Trustmark (TRMK) 10-K2 Mar 152014 FY Annual reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Jan. 31, 2015	Jun. 30, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	TRUSTMARK CORP
Entity Central Index Key	36146
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$1,118
Entity Common Stock, Shares Outstanding		67,525,041
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Assets
Cash and due from banks (noninterest-bearing)	$315,973	$345,761
Federal funds sold and securities purchased under reverse repurchase agreements	1,885	7,253
Securities available for sale (at fair value)	2,374,567	2,194,154
Securities held to maturity (fair value: $1,182,846-2014; $1,150,833-2013)	1,170,685	1,168,728
Loans held for sale (LHFS) (2014 includes $91,182 measured at fair value)	132,196	149,169
Loans held for investment (LHFI)	6,449,469	5,798,881
Less allowance for loan losses, LHFI	69,616	66,448
Net LHFI	6,379,853	5,732,433
Acquired loans:
Noncovered loans	525,783	769,990
Covered loans	23,626	34,216
Less allowance for loan losses, acquired loans	12,059	9,636
Net acquired loans	537,350	794,570
Net LHFI and acquired loans	6,917,203	6,527,003
Premises and equipment, net	200,781	207,283
Mortgage servicing rights	64,358	67,834
Goodwill	365,500	372,851
Identifiable intangible assets	33,234	41,990
Other real estate, excluding covered other real estate	92,509	106,539
Covered other real estate	6,060	5,108
FDIC indemnification asset	6,997	14,347
Other assets	568,685	582,363
Total Assets	12,250,633	11,790,383
Deposits:
Noninterest-bearing	2,748,635	2,663,503
Interest-bearing	6,949,723	7,196,399
Total deposits	9,698,358	9,859,902
Federal funds purchased and securities sold under repurchase agreements	443,543	251,587
Short-term borrowings	425,077	66,385
Long-term FHLB advances	1,253	8,458
Subordinated notes	49,936	49,904
Junior subordinated debt securities	61,856	61,856
Other liabilities	150,670	137,338
Total Liabilities	10,830,693	10,435,430
Shareholders' Equity
Common stock, no par value: Authorized: 250,000,000 shares Issued and outstanding: 67,481,992 shares - 2014; 67,372,980 shares - 2013	14,060	14,038
Capital surplus	356,244	349,680
Retained earnings	1,092,120	1,034,966
Accumulated other comprehensive loss, net of tax	-42,484	-43,731
Total Shareholders' Equity	1,419,940	1,354,953
Total Liabilities and Shareholders' Equity	$12,250,633	$11,790,383

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Assets
Securities held to maturity, fair value	$1,182,846	$1,150,833
Loans held for sale (LHFS) measured at fair value	$91,182
Shareholders' Equity
Common stock, par value (in dollars per share)	$0	$0
Common stock, authorized (in shares)	250,000,000	250,000,000
Common stock, issued (in shares)	67,481,992	67,372,980
Common stock, outstanding (in shares)	67,481,992	67,372,980

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest Income
Interest and fees on LHFS & LHFI	$263,582	$258,550	$279,796
Interest and fees on acquired loans	76,736	76,336	18,122
Interest on securities:
Taxable	80,148	72,818	66,950
Tax exempt	4,869	5,145	5,423
Interest on federal funds sold and securities purchased under reverse repurchase agreements	23	31	26
Other interest income	1,524	1,466	1,342
Total Interest Income	426,882	414,346	371,659
Interest Expense
Interest on deposits	15,323	19,718	24,604
Interest on federal funds purchased and securities sold under repurchase agreements	550	379	588
Other interest expense	5,673	5,762	5,477
Total Interest Expense	21,546	25,859	30,669
Net Interest Income	405,336	388,487	340,990
Provision for loan losses, LHFI	1,211	-13,421	6,766
Provision for loan losses, acquired loans	6,171	6,039	5,528
Net Interest Income After Provision for Loan Losses	397,954	395,869	328,696
Noninterest Income
Service charges on deposit accounts	48,671	51,576	50,351
Bank card and other fees	32,966	35,961	30,445
Mortgage banking, net	24,780	33,504	40,960
Insurance commissions	33,468	30,826	28,205
Wealth management	32,343	29,480	23,056
Other, net	614	-7,973	1,113
Securities gains, net	300	485	1,059
Total Noninterest Income	173,142	173,859	175,189
Noninterest Expense
Salaries and employee benefits	226,694	221,727	190,519
Services and fees	56,598	53,904	46,751
Net occupancy - premises	26,468	25,961	20,267
Equipment expense	23,860	24,538	20,478
ORE/Foreclosure expense	11,321	15,039	11,165
FDIC assessment expense	10,197	9,001	6,502
Other expense	53,867	65,561	48,820
Total Noninterest Expense	409,005	415,731	344,502
Income Before Income Taxes	162,091	153,997	159,383
Income taxes	38,529	36,937	42,100
Net Income	$123,562	$117,060	$117,283
Earnings Per Share
Basic (in dollars per share)	$1.83	$1.75	$1.81
Diluted (in dollars per share)	$1.83	$1.75	$1.81

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Consolidated Statements of Comprehensive Income [Abstract]
Net income per consolidated statements of income	$123,562	$117,060	$117,283
Unrealized gains (losses) on available for sale securities and transferred securities:
Unrealized holding gains (losses) arising during the period	10,933	-41,456	60
Less: adjustment for net gains realized in net income	-185	-299	-654
Change in net unrealized holding losses on securities transferred to held to maturity	3,711	-28,642	0
Pension and other postretirement benefit plans:
Net change in prior service costs	154	155	32
Recognized net loss due to BancTrust termination	837	0	0
Recognized net loss due to lump sum settlements	559	1,374	0
Recognized net actuarial (loss) gain	-13,374	20,218	836
Derivatives:
Change in the accumulated gain on effective cash flow hedge derivatives	-1,387	1,524	0
Less: adjustment for loss realized in net income	-1	0	0
Other comprehensive income (loss), net of tax	1,247	-47,126	274
Comprehensive income	$124,809	$69,934	$117,557

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Shareholders' Equity (USD $)	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2011	$13,364,000	$266,026,000	$932,526,000	$3,121,000	$1,215,037,000
Balance (in shares) at Dec. 31, 2011	64,142,498
Net income per consolidated statements of income	0	0	117,283,000	0	117,283,000
Other comprehensive income (loss)	0	0	0	274,000	274,000
Cash dividends paid on common stock	0	0	-59,961,000	0	-59,961,000
Common stock issued, long-term incentive plan (in shares)	167,715
Common stock issued, long-term incentive plan	36,000	4,012,000	-5,285,000	0	-1,237,000
Common stock issued, business combination (in shares)	510,201
Common stock issued, business combination	106,000	11,894,000	0	0	12,000,000
Compensation expense, long-term incentive plan	0	3,973,000	0	0	3,973,000
Balance at Dec. 31, 2012	13,506,000	285,905,000	984,563,000	3,395,000	1,287,369,000
Balance (in shares) at Dec. 31, 2012	64,820,414
Net income per consolidated statements of income	0	0	117,060,000	0	117,060,000
Other comprehensive income (loss)	0	0	0	-47,126,000	-47,126,000
Cash dividends paid on common stock	0	0	-62,276,000	0	-62,276,000
Common stock issued, long-term incentive plan (in shares)	307,696
Common stock issued, long-term incentive plan	64,000	7,149,000	-4,381,000	0	2,832,000
Common stock issued, business combination (in shares)	2,244,870
Common stock issued, business combination	468,000	53,027,000	0	0	53,495,000
Compensation expense, long-term incentive plan	0	3,599,000	0	0	3,599,000
Balance at Dec. 31, 2013	14,038,000	349,680,000	1,034,966,000	-43,731,000	1,354,953,000
Balance (in shares) at Dec. 31, 2013	67,372,980				67,372,980
Net income per consolidated statements of income	0	0	123,562,000	0	123,562,000
Other comprehensive income (loss)	0	0	0	1,247,000	1,247,000
Cash dividends paid on common stock	0	0	-62,474,000	0	-62,474,000
Common stock issued, long-term incentive plan (in shares)	109,012
Common stock issued, long-term incentive plan	22,000	2,412,000	-3,934,000	0	-1,500,000
Compensation expense, long-term incentive plan	0	4,152,000	0	0	4,152,000
Balance at Dec. 31, 2014	$14,060,000	$356,244,000	$1,092,120,000	($42,484,000)	$1,419,940,000
Balance (in shares) at Dec. 31, 2014	67,481,992				67,481,992

Consolidated_Statements_of_Cha1

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Consolidated Statements of Changes in Shareholders' Equity [Abstract]
Cash dividends paid on common stock (in dollars per share)	$0.92	$0.92	$0.92

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Activities
Net income	$123,562	$117,060	$117,283
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses, net	7,382	-7,382	12,294
Depreciation and amortization	36,072	37,153	29,275
Net amortization of securities	7,701	6,427	7,008
Securities gains, net	-300	-485	-1,059
Gains on sales of loans, net	-10,762	-26,422	-33,918
Bargain purchase gain on acquisitions	0	0	-3,635
Deferred income tax provision (benefit)	18,700	21,163	-8,452
Proceeds from sales of loans held for sale	924,289	1,383,967	1,849,712
Purchases and originations of loans held for sale	-893,569	-1,270,460	-1,856,293
Originations and sales of mortgage servicing rights, net	-12,293	-18,481	-23,253
Increase in bank-owned life insurance	-4,728	-1,446	-423
Net decrease (increase) in other assets	4,886	54,885	-15,241
Net (decrease) increase in other liabilities	-6,010	-2,319	16,482
Other operating activities, net	16,337	7,523	22,497
Net cash provided by operating activities	211,267	301,183	112,277
Investing Activities
Proceeds from calls and maturities of securities held to maturity	93,471	13,374	15,534
Proceeds from calls and maturities of securities available for sale	405,186	766,858	917,316
Proceeds from sales of securities available for sale	56,814	227,930	34,826
Purchases of securities held to maturity	-90,114	-35,045	0
Purchases of securities available for sale	-631,713	-1,227,860	-1,122,480
Purchase of bank owned life insurance	0	-100,000	0
Net decrease (increase) in federal funds sold and securities purchased under reverse repurchase agreements	5,368	-207	2,212
Net (increase) decrease in loans	-437,240	18,266	250,508
Purchases of premises and equipment	-12,389	-15,989	-17,172
Proceeds from sales of premises and equipment	4,641	4,168	4
Proceeds from sales of other real estate	48,119	46,267	34,992
Investments in tax credit and other partnerships	-5,435	-45,766	-20,152
Distributions received for investments in tax credit and other partnerships	7,037	0	0
Net cash received in business combination	0	89,037	78,151
Net cash (used in) provided by investing activities	-556,255	-258,967	173,739
Financing Activities
Net (decrease) increase in deposits	-161,544	223,131	121,358
Net increase (decrease) in federal funds purchased and securities sold under repurchase agreements	191,956	-37,242	-315,671
Net increase (decrease) in short-term borrowings	348,920	-20,858	-1,641
Payments on long-term FHLB advances	-156	-531	0
Redemption of junior subordinated debt securities	0	-33,000	0
Common stock dividends	-62,474	-62,276	-59,961
Common stock issued-net, long-term incentive plan	-1,307	3,640	-1,318
Excess tax (expense) benefit from stock-based compensation arrangements	-195	-808	81
Net cash provided by (used in) financing activities	315,200	72,056	-257,152
(Decrease) Increase in cash and cash equivalents	-29,788	114,272	28,864
Cash and cash equivalents at beginning of year	345,761	231,489	202,625
Cash and cash equivalents at end of year	$315,973	$345,761	$231,489

Significant_Accounting_Policie

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Significant Accounting Policies [Abstract]
Significant Accounting Policies	Note 1 – Significant Accounting Policies

	Business

	Trustmark Corporation (Trustmark) is a bank holding company headquartered in Jackson, Mississippi. Through its subsidiaries, Trustmark operates as a financial services organization providing banking and financial solutions to corporate institutions and individual customers through 205 offices in Alabama, Florida, Mississippi, Tennessee and Texas.

	Basis of Financial Statement Presentation

	The consolidated financial statements include the accounts of Trustmark and all other entities in which Trustmark has a controlling financial interest. All significant intercompany accounts and transactions have been eliminated in consolidation. Certain reclassifications have been made to prior period amounts to conform to the current period presentation.

	The consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (GAAP). The preparation of financial statements in conformity with these accounting principles requires Management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and income and expense during the reporting period and the related disclosures. Although Management’s estimates contemplate current conditions and how they are expected to change in the future, it is reasonably possible that in 2015 actual conditions could vary from those anticipated, which could affect Trustmark’s results of operations and financial condition. The allowance for loan losses, the amount and timing of expected cash flows from acquired loans and the Federal Deposit Insurance Corporation (FDIC) indemnification asset, the valuation of other real estate, the fair value of mortgage servicing rights, the valuation of goodwill and other identifiable intangibles, the status of contingencies and the fair values of financial instruments are particularly subject to change. Actual results could differ from those estimates.
	Securities

	Securities are classified as either held to maturity, available for sale or trading. Securities are classified as held to maturity and carried at amortized cost when Management has the positive intent and the ability to hold them until maturity. Securities to be held for indefinite periods of time are classified as available for sale and carried at fair value, with the unrealized holding gains and losses reported as a component of other comprehensive income (loss), net of tax. Securities available for sale are used as part of Trustmark’s interest rate risk management strategy and may be sold in response to changes in interest rates, changes in prepayment rates and other factors. Management determines the appropriate classification of securities at the time of purchase. Trustmark currently has no securities classified as trading.

	The amortized cost of debt securities classified as securities held to maturity or securities available for sale is adjusted for amortization of premiums and accretion of discounts to maturity over the estimated life of the security using the interest method. Such amortization or accretion is included in interest on securities. Realized gains and losses are determined using the specific identification method and are included in noninterest income as securities gains, net.

	Securities transferred from the available for sale category to the held to maturity category are recorded at fair value at the date of transfer. Unrealized holding gains or losses associated with the transfer of securities from available for sale to held to maturity are included in the balance of accumulated other comprehensive loss in the consolidated balance sheets. These unrealized holding gains or losses are amortized over the remaining life of the security as a yield adjustment in a manner consistent with the amortization or accretion of the original purchase premium or discount on the associated security.

	Trustmark reviews securities for impairment quarterly. Declines in the fair value of held to maturity and available for sale securities below their cost that are deemed to be other than temporary are reflected in earnings as realized losses to the extent the impairment is related to credit losses. The amount of the impairment related to other factors is recognized as a component of other comprehensive income (loss), net of tax. In estimating other-than-temporary impairment losses, Management considers, among other things, the length of time and the extent to which the fair value has been less than cost, the financial condition and near-term prospects of the issuer and Trustmark’s intent and ability to hold the security for a period of time sufficient to allow for any anticipated recovery in fair value.

	Loans Held for Sale (LHFS)

	Primarily, all mortgage loans purchased from wholesale customers or originated in Trustmark’s General Banking Division are considered to be held for sale. In certain circumstances, Trustmark will retain a mortgage loan in its portfolio based on banking relationships or certain investment strategies. Mortgage LHFS in the secondary market that are hedged using fair value hedges are carried at estimated fair value on an aggregate basis. Substantially, all mortgage LHFS are hedged. These loans are primarily first-lien mortgage loans originated or purchased by Trustmark. Deferred loan fees and costs are reflected in the basis of LHFS and, as such, impact the resulting gain or loss when loans are sold. Adjustments to reflect fair value and realized gains and losses upon ultimate sale of the loans are recorded in noninterest income in mortgage banking, net.

	Government National Mortgage Association (GNMA) optional repurchase programs allow financial institutions to buy back individual delinquent mortgage loans that meet certain criteria from the securitized loan pool for which the institution provides servicing. At the servicer’s option and without GNMA’s prior authorization, the servicer may repurchase such a delinquent loan for an amount equal to 100 percent of the remaining principal balance of the loan. Under Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic 860, “Transfers and Servicing,” this buy-back option is considered a conditional option until the delinquency criteria are met, at which time the option becomes unconditional. When Trustmark is deemed to have regained effective control over these loans under the unconditional buy-back option, the loans can no longer be reported as sold and must be brought back onto the balance sheet as LHFS, regardless of whether Trustmark intends to exercise the buy-back option. These loans are reported as LHFS with the offsetting liability being reported as short-term borrowings.

	During the quarter ended December 31, 2014, Trustmark elected to measure all mortgage loans purchased or originated which are held for sale under the fair value option permitted by FASB ASC Topic 825, “Financial Instruments.” The fair value option election applies to mortgage LHFS purchased or originated by Trustmark on or after October 1, 2014. The fair value option election does not apply to GNMA optional repurchase loans. Trustmark elected the fair value option for its mortgage LHFS in order to report these loans at fair value without having to apply hedge accounting provisions.

	As a result of this election, Trustmark unrealized gains and losses resulting from changes in the fair value of the mortgage LHFS are reported as noninterest income in mortgage banking, net. Prior to this election, Trustmark deferred the upfront loan fees and costs related to the mortgage LHFS. In general, the mortgage LHFS are only retained on Trustmark’s balance sheet for 30 to 45 days before they are pooled and sold in the secondary market. The difference between deferring these loan fees and costs until the loans are sold and recognizing them in earnings as incurred as required by FASB ASC Topic 825-10 is considered immaterial. Therefore, Trustmark has chosen to continue to defer the upfront loan fees and costs. There was no impact to Trustmark’s consolidated financial statements on the date of the election.

	Loans Held for Investment (LHFI)

	LHFI are stated at the amount of unpaid principal, adjusted for the net amount of direct costs and nonrefundable loan fees associated with lending. The net amount of nonrefundable loan origination fees and direct costs associated with the lending process, including commitment fees, is deferred and accreted to interest income over the lives of the loans using a method that approximates the interest method. Interest on LHFI is accrued and recorded as interest income based on the outstanding principal balance.

	Trustmark has established acceptable ranges or limits for specific types of credit. Within these categories, the overall risk of individual credits is controlled through maximum advance rates and repayment periods and minimum debt service coverage ratios as defined in policy as well as continuous monitoring of these measures throughout the life of the loan. These policy directives are periodically reviewed to ensure that they continue to reflect underwriting considerations deemed essential to maintaining a sound loan portfolio. It is recognized that not all extensions of credit will fully comply with policy limitations. Accordingly, such exceptions to loan policy must be justified by other mitigating features of the loan and must receive proper approval as designated in the loan policy.

	Past due LHFI are loans contractually past due 30 days or more as to principal or interest payments. A LHFI is classified as nonaccrual, and the accrual of interest on such loan is discontinued, when the contractual payment of principal or interest becomes 90 days past due on commercial credits and 120 days past due on non-business purpose credits. In addition, a credit may be placed on nonaccrual at any other time Management has serious doubts about further collectibility of principal or interest according to the contractual terms, even though the loan is currently performing. A LHFI may remain in accrual status if it is in the process of collection and well secured. When a LHFI is placed in nonaccrual status, unpaid interest is reversed against interest income. Interest received on nonaccrual LHFI is applied against principal. LHFI are restored to accrual status when the obligation is brought current or has performed in accordance with the contractual terms for a reasonable period of time, and the ultimate collectibility of the total contractual principal and interest is no longer in doubt.

	A LHFI is considered impaired when, based on current information and events, it is probable that Trustmark will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. If a LHFI is impaired, a specific valuation allowance is allocated, if necessary, so that the loan is reported net, at the present value of estimated future cash flows using the loan’s existing rate or at the fair value of collateral if repayment is expected solely from the collateral. All classes of commercial LHFI of $500,000 or more, which are classified as nonaccrual, are identified for impairment analysis (specifically evaluated impaired LHFI). Consistent with the policy for nonaccrual LHFI, interest payments on impaired LHFI are applied to principal. Impaired LHFI, or portions thereof, are charged off when deemed uncollectible.

	Commercial purpose LHFI are charged off when a determination is made that the loan is uncollectible and continuance as a bankable asset is not warranted. Consumer LHFI secured by 1-4 family residential real estate are generally charged off or written down to the fair value of the collateral less cost to sell at no later than 180 days of delinquency. Non-real estate consumer purpose LHFI, including both secured and unsecured loans, are generally charged off by 120 days of delinquency. Consumer revolving lines of credit and credit card debt are generally charged off on or prior to 180 days of delinquency.

	Allowance for Loan Losses, LHFI

	The allowance for loan losses, LHFI is established through provisions for estimated loan losses charged against net income. The allowance account is maintained at a level which is believed to be adequate by Management based on estimated probable losses within the LHFI portfolio. Evaluations of the portfolio and individual credits are inherently subjective, as they require estimates, assumptions and judgments as to the facts and circumstances of particular situations. Some of the factors considered, such as amounts and timing of future cash flows expected to be received, may be susceptible to significant change.

	Trustmark's allowance methodology is based on guidance provided in Securities and Exchange Commission (SEC) Staff Accounting Bulletin (SAB) No. 102, "Selected Loan Loss Allowance Methodology and Documentation Issues," as well as other regulatory guidance. The allowance for loan losses, LHFI consists of three components: (i) a historical valuation allowance determined in accordance with FASB ASC Topic 450, "Contingencies," based on historical loan loss experience for LHFI with similar characteristics and trends, (ii) a specific valuation allowance determined in accordance with FASB ASC Topic 310 "Receivables," based on probable losses on specific LHFI and (iii) a qualitative risk valuation allowance determined in accordance with FASB ASC Topic 450 based on general economic conditions and other specific internal and external qualitative risk factors. Each of these components calls for estimates, assumptions and judgments as described below.

	Historical Valuation Allowance

	The historical valuation allowance is derived by application of a historical net loss percentage to the outstanding balances of LHFI contained in designated pools and risk rating categories. Pools are established by grouping credits that display similar characteristics and trends such as commercial LHFI for working capital purposes and non-working capital purposes, commercial real estate LHFI (which are further segregated into construction, land, lots and development, owner-occupied and non-owner occupied categories), 1-4 family LHFI and other consumer LHFI. Within these pools, LHFI are further segregated based on Trustmark's internal credit risk rating process that evaluates, among other things: the obligor's ability and willingness to pay, the value of underlying collateral, the ability of guarantors to meet their payment obligations, management experience and effectiveness, and the economic environment and industry in which the borrower operates. The historical net loss percentages, calculated on a quarterly basis, are proportionally distributed to each grade within loan groups based upon degree of risk.

	The historical net loss percentages are calculated using a 12 quarter look-back period, which is the period that best reflects losses inherent in the current loan portfolio. The look-back period sufficiently captures the volatility in net charge-off rates from quarter to quarter and affects the qualitative adjustments that are required to capture the differences in conditions between the current period and those that were prevailing during the look-back period.

	The loss emergence period refers to the period of time between the events that trigger a loss and charge-off of that loss. Losses are usually not immediately known and determining the loss event can be difficult. It takes time for the borrower and extent of loss to be identified and determined. Management may not be aware that the loss event has occurred until the borrower exhibits the inability to pay or other evidence of credit deterioration. Based upon its analysis, Trustmark has determined that a one year loss emergence period is appropriate.

	Loans-Specific Valuation Allowance

	Once a LHFI is classified, it is subject to periodic review to determine whether or not the loan is impaired. If determined to be impaired, the loan is evaluated using one of the valuation criteria contained in FASB ASC Topic 310. A formal impairment analysis is performed on all commercial non-accrual LHFI with an outstanding balance of $500,000 or more, and based upon this analysis LHFI are written down to net realizable value.

	Qualitative Risk Valuation Allowance

	The qualitative risk valuation allowance is based on general economic conditions and other internal and external factors affecting Trustmark as a whole as well as specific LHFI. Factors considered include the following within Trustmark's five key market regions: the experience, ability, and effectiveness of Trustmark's lending management and staff; adherence to Trustmark's loans policies, procedures, and internal controls; the volume of exceptions relating to collateral, underwriting and financial documentation; credit concentrations; recent performance trends; regional economic trends; the impact of recent acquisitions; and the impact of significant natural disasters. These factors are evaluated on a quarterly basis with the results incorporated into qualitative factor allocation matrices which are used to establish an appropriate allowance.

Other factors included in the qualitative risk valuation allowance include consideration of: commercial loan facility risk that embodies the nature, frequency and duration of the repayment structure as it pertains to the actual source of loan repayment, commercial nonaccrual loans under $500 thousand which are below the threshold to perform an impairment analysis, and independent consumer credit bureau scores that are monitored to identify shifts in risk that are represented in the retail portfolio. These factors are also evaluated on a quarterly basis with the exception of the commercial nonaccrual loans under $500 thousand which are evaluated monthly.

Acquired Loans

Acquired loans are accounted for under the acquisition method of accounting. The acquired loans are recorded at their estimated fair values at the time of acquisition. The fair value of acquired loans is determined using a discounted cash flow model based on assumptions regarding the amount and timing of principal and interest payments, estimated prepayments, estimated default rates, estimated loss severity in the event of defaults and current market rates. Estimated credit losses are included in the determination of fair value; therefore, an allowance for loan losses is not recorded on the acquisition date.

Trustmark accounts for acquired impaired loans under FASB ASC Topic 310-30, “Loans and Debt Securities Acquired with Deteriorated Credit Quality.” An acquired loan is considered impaired when there is evidence of credit deterioration since origination and it is probable at the date of acquisition that Trustmark would be unable to collect all contractually required payments. Acquired loans accounted for under FASB ASC Topic 310-30 are referred to as “acquired impaired loans.” Revolving credit agreements, such as home equity lines, and commercial leases are excluded from acquired impaired loan accounting requirements.

For acquired impaired loans, Trustmark (a) calculates the contractual amount and timing of undiscounted principal and interest payments (the “undiscounted contractual cash flows”) and (b) estimates the amount and timing of undiscounted expected principal and interest payments (the “undiscounted expected cash flows”). Under FASB ASC Topic 310-30, the difference between the undiscounted contractual cash flows and the undiscounted expected cash flows is the nonaccretable difference. The nonaccretable difference represents an estimate of the loss exposure of principal and interest related to the acquired impaired loan portfolio, and such amount is subject to change over time based on the performance of such loans. The excess of undiscounted expected cash flows at acquisition over the initial fair value of acquired impaired loans is referred to as the “accretable yield” and is recorded as interest income over the estimated life of the loans using the effective yield method if the timing and amount of the future cash flows is reasonably estimable. Under the effective yield method, the accretable yield is recorded as an accretion of interest income over the life of the loan at the market interest rate.

Trustmark aggregates certain acquired loans into pools of loans with common credit risk characteristics such as loan type and risk rating. To establish accounting pools of acquired loans, loans are first categorized by similar purpose, collateral and geographic region. Within each category, loans are further segmented by ranges of risk determinants observed at the time of acquisition. For commercial loans, the primary risk determinant is the risk rating as assigned by Trustmark. For consumer loans, the risk determinants include delinquency, delinquency history and FICO scores. Statistical comparison of the pools reflect that each pool is comprised of loans generally of similar characteristics, including loan type, loan risk and weighted average life. Each pool is then reviewed for similarity of the pool constituents, including standard deviation of purchase price, weighted average life and concentration of the largest loans. Loan pools are initially booked at the aggregate fair value of the loan pool constituents, based on the present value of Trustmark's expected cash flows from the loans. An acquired loan is removed from a pool of loans only if the loan is sold, foreclosed, payment is received in full satisfaction of the loan or the loan is fully charged off. The acquired loan is removed from the pool at the carrying value. If an individual acquired loan is removed from a pool of loans, the difference between its relative carrying amount and its cash, fair value of the collateral, or other assets received will be recognized as a gain or loss immediately in interest income on loans and would not affect the effective yield used to recognize the accretable yield on the remaining pool. Certain acquired loans are not pooled and are accounted for individually. Such loans are withheld from pools due to the inherent uncertainty of the timing and amount of their cash flows or because they are not a suitable similar constituent to the established pools.

As required by FASB ASC Topic 310-30, Trustmark periodically re-estimates the expected cash flows to be collected over the life of the acquired impaired loans. If, based on current information and events, it is probable that Trustmark will be unable to collect all cash flows expected at acquisition plus additional cash flows expected to be collected arising from changes in estimate after acquisition, the acquired loans are considered impaired. The decrease in the expected cash flows reduces the carrying value of the acquired impaired loans as well as the accretable yield and results in a charge to income through the provision for loan losses, acquired loans and the establishment of an allowance for loan losses, acquired loans. If, based on current information and events, it is probable that there is a significant increase in the cash flows previously expected to be collected or if actual cash flows are significantly greater than cash flows previously expected, Trustmark will reduce any remaining allowance for loan losses, acquired loans established on the acquired impaired loans for the increase in the present value of cash flows expected to be collected. The increase in the expected cash flows for the acquired impaired loans over those originally estimated at acquisition increases the carrying value of the acquired impaired loans as well as the accretable yield. The increase in the accretable yield is recognized as interest income prospectively over the remaining life of the acquired impaired loans. The carrying value of acquired impaired loans is reduced by payments received, both principal and interest, and increased by the portion of the accretable yield recognized as interest income.

Under FASB ASC Topic 310-30, acquired impaired loans are generally considered accruing and performing loans as the loans accrete interest income over the estimated life of the loan when expected cash flows are reasonably estimable. Accordingly, acquired impaired loans that are contractually past due are still considered to be accruing and performing loans as long as the estimated cash flows are received as expected. If the timing and amount of cash flows is not reasonably estimable, the loans may be classified as nonaccrual loans and interest income may be recognized on a cash basis or as a reduction of the principal amount outstanding.

Covered Loans

Loans acquired in a FDIC-assisted transaction and covered under loss-share agreements are referred to as “covered loans” and are reported separately in Trustmark’s consolidated financial statements. Covered loans are recorded at their estimated fair value at the time of acquisition exclusive of the expected reimbursement cash flows from the FDIC.

FDIC Indemnification Asset

Trustmark has elected to account for amounts receivable under a loss-share agreement as an indemnification asset in accordance with FASB ASC Topic 805, “Business Combinations.” A FDIC indemnification asset is initially recorded at fair value, based on the discounted value of expected future cash flows under the loss-share agreement. The difference between the present value at the acquisition date and the undiscounted cash flows Trustmark expects to collect from the FDIC is accreted into noninterest income over the life of the FDIC indemnification asset. Pursuant to the provisions of the loss-share agreement, the FDIC indemnification asset is presented net of any true-up provision due to the FDIC at the termination of the loss-share agreement.

The FDIC indemnification asset is reduced as expected losses on covered loans and covered other real estate decline or as loss-share claims are submitted to the FDIC. The FDIC indemnification asset is revalued concurrent with the loan re-estimation and adjusted for any changes in expected cash flows based on recent performance and expectations for future performance of covered loans and covered other real estate. These adjustments are measured on the same basis as the related covered loans and covered other real estate. Increases in the cash flows of the covered loans and covered other real estate over those expected reduce the FDIC indemnification asset, and decreases in the cash flows of the covered loans and covered other real estate below those expected increase the FDIC indemnification asset. Increases and decreases to the FDIC indemnification asset are recorded as adjustments to noninterest income.

Write-downs of the FDIC indemnification asset resulting from improvements in expected cash flows and covered losses based on the re-estimation of acquired covered loans are amortized over the lesser of the remaining life or contractual FDIC agreement period of the acquired covered loan as a yield adjustment consistent with the associated acquired covered loan. All other valuation changes of the FDIC indemnification asset (i.e., pay-offs of acquired covered loans, sales of covered other real estate, and reductions of FDIC loss claims) are accounted for under the “collectibility method,” which recognized write-downs of the FDIC indemnification asset immediately in noninterest income.

Premises and Equipment, Net

Premises and equipment are stated at cost, less accumulated depreciation and amortization. Depreciation is charged to expense over the estimated useful lives of the assets, which are up to thirty-nine years for buildings and three to ten years for furniture and equipment. Leasehold improvements are amortized over the terms of the respective leases or the estimated useful lives of the improvements, whichever is shorter. In cases where Trustmark has the right to renew the lease for additional periods, the lease term for the purpose of calculating amortization of the capitalized cost of the leasehold improvements is extended when Trustmark is “reasonably assured” that it will renew the lease. Depreciation and amortization expenses are computed using the straight-line method. Trustmark continually evaluates whether events and circumstances have occurred that indicate that such long-lived assets have become impaired. Measurement of any impairment of such long-lived assets is based on the fair values of those assets. There were no impairment losses on premises and equipment recorded during 2014, 2013 or 2012.

Mortgage Servicing Rights (MSR)

Trustmark recognizes as assets the rights to service mortgage loans based on the estimated fair value of the MSR when loans are sold and the associated servicing rights are retained. Trustmark has elected to account for MSR at fair value.

The fair value of MSR is determined using discounted cash flow techniques benchmarked against third-party valuations. Estimates of fair value involve several assumptions, including the key valuation assumptions about market expectations of future prepayment rates, interest rates and discount rates which are provided by a third-party firm. Prepayment rates are projected using an industry standard prepayment model. The model considers other key factors, such as a wide range of standard industry assumptions tied to specific portfolio characteristics such as remittance cycles, escrow payment requirements, geographic factors, foreclosure loss exposure, VA no-bid exposure, delinquency rates and cost of servicing, including base cost and cost to service delinquent mortgages. Prevailing market conditions at the time of analysis are factored into the accumulation of assumptions and determination of servicing value.

Trustmark economically hedges changes in fair value of the MSR attributable to interest rates. See Note 1 – Significant Accounting Policies, “Derivative Financial Instruments – Derivatives not Designated as Hedging Instruments” for information regarding these derivative instruments.

Goodwill and Identifiable Intangible Assets

Trustmark accounts for goodwill and other intangible assets in accordance with FASB ASC Topic 350, “Intangibles – Goodwill and Other.” Goodwill, which represents the excess of cost over the fair value of the net assets of an acquired business, is not amortized but tested for impairment on an annual basis, which is October 1 for Trustmark, or more often if events or circumstances indicate that there may be impairment.

Identifiable intangible assets are acquired assets that lack physical substance but can be distinguished from goodwill because of contractual or legal rights or because the assets are capable of being sold or exchanged either on their own or in combination with a related contract, asset or liability. Trustmark’s identifiable intangible assets primarily relate to core deposits, insurance customer relationships and borrower relationships. These intangibles, which have definite useful lives, are amortized on an accelerated basis over their estimated useful lives. In addition, these intangibles are evaluated annually for impairment or whenever events and changes in circumstances indicate that the carrying amount should be reevaluated. Trustmark also purchased banking charters in order to facilitate its entry into the states of Florida and Texas. These identifiable intangible assets are being amortized on a straight-line method over 20 years.

Other Real Estate

Other real estate includes assets that have been acquired in satisfaction of debt through foreclosure and is recorded at the lower of cost or estimated fair value less the estimated cost of disposition. Fair value is based on independent appraisals and other relevant factors. Valuation adjustments required at foreclosure are charged to the allowance for loan losses. Other real estate is revalued on an annual basis or more often if market conditions necessitate. Subsequent to foreclosure, losses on the periodic revaluation of the property are charged against an existing other real estate specific reserve or to noninterest expense in ORE/Foreclosure expense if a reserve does not exist. Costs of operating and maintaining the properties as well as gains or losses on their disposition are also included in ORE/Foreclosure expense as incurred. Improvements made to properties are capitalized if the expenditures are expected to be recovered upon the sale of the properties.

Covered Other Real Estate

All other real estate acquired in a FDIC-assisted acquisition that is subject to a FDIC loss-share agreement is referred to as “covered other real estate” and reported separately in Trustmark’s consolidated balance sheets. Covered other real estate is initially recorded at its estimated fair value on the acquisition date based on an independent appraisal less estimated selling costs. Foreclosed covered loan collateral is transferred into covered other real estate at the collateral’s net realizable value. Covered other real estate is reported exclusive of expected reimbursement cash flows from the FDIC. Any subsequent valuation adjustments due to declines in fair value are charged to noninterest expense in ORE/Foreclosure expense and are mostly offset by other noninterest income representing the corresponding increase to the FDIC indemnification asset for the offsetting loss reimbursement amount. Any recoveries of previous valuation adjustments are credited to ORE/Foreclosure expense with a corresponding charge to other noninterest income for the portion of the recovery that is due to the FDIC.

Federal Home Loan Bank (FHLB) and Federal Reserve Bank (FRB) of Atlanta Stock

Securities with limited marketability, such as stock in the FRB of Atlanta and the FHLB, are carried at cost. Trustmark’s investment in member bank stock is included in other assets because these equity securities do not have a readily determinable fair value, which places them outside the scope of FASB ASC Topic 320, “Investments – Debt and Equity Securities.” At December 31, 2014 and 2013, Trustmark’s investment in member bank stock totaled $44.1 million and $28.4 million, respectively. The carrying value of Trustmark’s member bank stock gave rise to no other-than-temporary impairment for the years ended December 31, 2014, 2013 and 2012.

Insurance Commissions

Commission revenue is recognized as of the effective date of the insurance policy or the date the customer is billed, whichever is later. Trustmark also receives contingent commissions from insurance companies as additional incentive for achieving specified premium volume goals and/or the loss experience of the insurance placed by Trustmark. Contingent commissions from insurance companies are recognized throughout the calendar year using reasonable estimates that are continuously reviewed and revised to reflect current experience. Trustmark maintains reserves for commission adjustments and doubtful accounts receivable which were not considered significant at December 31, 2014 or 2013.

Wealth Management

Assets under administration held by Trustmark in a fiduciary or agency capacity for customers are not included in the Trustmark’s consolidated balance sheets. Investment management and trust fee income is recorded on a cash basis, which because of the regularity of the billing cycles, approximates the accrual method, in accordance with industry practice.

Derivative Financial Instruments

Trustmark maintains an overall interest rate risk management strategy that incorporates the use of derivative instruments to minimize significant unplanned fluctuations in earnings and cash flows caused by interest rate volatility. Trustmark’s interest rate risk management strategy involves modifying the repricing characteristics of certain assets and liabilities so that changes in interest rates do not adversely affect the net interest margin and cash flows. Under the guidelines of FASB ASC Topic 815, “Derivatives and Hedging,” all derivative instruments are required to be recognized as either assets or liabilities and carried at fair value on the balance sheet. The fair value of derivative positions outstanding is included in other assets and/or other liabilities in the accompanying consolidated balance sheets and in the net change in these financial statement line items in the accompanying consolidated statements of cash flows as well as included in noninterest income in the accompanying consolidated statements of income and other comprehensive income (loss) in the accompanying consolidated statements of comprehensive income. Trustmark’s derivative instruments are subject to master netting agreements, and therefore, eligible for offsetting in the consolidated balance sheets. Trustmark has elected to not offset any derivative instruments in its consolidated balance sheets.

Derivatives Designated as Hedging Instruments

As part of Trustmark’s risk management strategy in the mortgage banking area, derivative instruments such as forward sales contracts are utilized. Trustmark’s obligations under forward contracts consist of commitments to deliver mortgage loans, originated and/or purchased, in the secondary market at a future date. The ineffective portion of changes in the fair value of the forward contracts and changes in the fair value of the loans designated as LHFS was recorded in noninterest income in mortgage banking, net. On October 1, 2014, Trustmark elected to account for its mortgage LHFS purchased or originated on or after the election date under the fair value option with unrealized gains and losses reported in noninterest income in mortgage banking, net. As a result of this election, the forward sales contracts no longer qualify as derivative instruments designated as fair value hedges under FASB ASC Topic 815. Subsequent to the election, changes in the fair value of these derivative instruments are recorded in noninterest income in mortgage banking, net and are offset by changes in the fair value of LHFS. See Note 1 – Significant Accounting Policies, “Loans Held for Sale (LHFS)” for information regarding the fair value option election.

During 2013, Trustmark entered into a forward interest rate swap contract on its junior subordinated debentures, with the objective of protecting the quarterly interest payments from the risk of variability of those payments resulting from changes in the three-month LIBOR interest rate for the five-year period beginning December 31, 2014 and ending December 31, 2019. This derivative instrument was designated as a cash flow hedge under FASB ASC Topic 815. Any accumulated net after-tax gains related to effective cash flow hedge are included in accumulated other comprehensive loss. Any ineffective portion of the interest rate swap is reclassified from accumulated other comprehensive loss to noninterest expense in the consolidated statements of income for the relevant periods. Beginning December 31, 2014, the effective date of the interest rate swap, amounts reported in accumulated other comprehensive loss related to this derivative will be reclassified to other interest expense as interest payments are made on Trustmark’s variable rate junior subordinated debentures.

Derivatives not Designated as Hedging Instruments

Trustmark utilizes a portfolio of exchange-traded derivative instruments, such as Treasury note futures contracts and option contracts, to achieve a fair value return that economically hedges changes in fair value of MSR attributable to interest rates. These transactions are considered freestanding derivatives that do not otherwise qualify for hedge accounting. These exchange-traded derivative instruments are accounted for at fair value with changes in the fair value recorded in noninterest income in mortgage banking, net and are offset by changes in the fair value of MSR. The MSR fair value represents the present value of future cash flows, which among other things includes decay and the effect of changes in interest rates. Ineffectiveness of hedging the MSR fair value is measured by comparing the change in value of hedge instruments to the change in the fair value of the MSR asset attributable to changes in interest rates and other market driven changes in valuation inputs and assumptions.

Trustmark also utilizes derivative instruments such as interest rate lock commitments in its mortgage banking area. Rate lock commitments are residential mortgage loan commitments with customers, which guarantee a specified interest rate for a specified time period. Changes in the fair value of these derivative instruments are recorded in noninterest income in mortgage banking, net and are offset by the changes in the fair value of forward sales contracts.

Trustmark offers certain derivatives products directly to qualified commercial lending clients seeking to manage their interest rate risk. Trustmark economically hedges interest rate swap transactions executed with commercial lending clients by entering into offsetting interest rate swap transactions with institutional derivatives market participants. Derivative transactions executed as part of this program are not designated as qualifying hedging relationships and are, therefore, carried at fair value with the change in fair value recorded in noninterest income in bank card and other fees. Because these derivatives have mirror-image contractual terms, in addition to collateral provisions which mitigate the impact of non-performance risk, the changes in fair value are expected to substantially offset.

Income Taxes

Trustmark accounts for uncertain tax positions in accordance with FASB ASC Topic 740, “Income Taxes,” which clarifies the accounting and disclosure for uncertainty in tax positions. Under the guidance of FASB ASC Topic 740, Trustmark accounts for deferred income taxes using the liability method. Deferred tax assets and liabilities are based on temporary differences between the financial statement carrying amounts and the tax basis of Trustmark’s assets and liabilities. Deferred tax assets and liabilities are measured using the enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be realized or settled and are presented net in the balance sheet in other assets.

Stock-Based Compensation

Trustmark accounts for the stock and incentive compensation under the provisions of FASB ASC Topic 718, “Compensation – Stock Compensation.” Under this accounting guidance, fair value is established as the measurement objective in accounting for stock awards and requires the application of a fair value based measurement method in accounting for compensation cost, which is recognized over the requisite service period.

Statements of Cash Flows

For purposes of reporting cash flows, cash and cash equivalents include cash on hand and amounts due from banks. The following table reflects specific transaction amounts for the periods presented ($ in thousands):

		Years Ended December 31,
		2014			2013			2012
Income taxes paid		$	13,710		$	14,520		$	57,834
Interest expense paid on deposits and borrowings			22,268			25,715			31,496
Noncash transfers from loans to foreclosed properties (1)			39,778			41,042			37,635
Transfer of long-term FHLB advances to short-term			6,644			-			-
Assets acquired in business combination			-			1,845,543			234,960
Liabilities assumed in business combination			-			1,821,066			209,322

-1	Includes transfers from covered loans to foreclosed properties.

During the first quarter of 2014, Trustmark identified an error in its Consolidated Statements of Cash Flows for the year ended December 31, 2013. Trustmark incorrectly reported its investment in bank-owned life insurance during the third quarter of 2013 as an operating activity instead of as an investing activity. During the third quarter of 2014, Trustmark identified an error in its Consolidated Statements of Cash Flows for the years ended December 31, 2013 and 2012. Trustmark incorrectly reported its investments in tax credit and other partnerships as an operating activity instead of as an investing activity. The errors occurred in the reported Consolidated Statements of Cash Flows and had no impact on the cash and cash equivalents at the end of the period within the Consolidated Statements of Cash Flows for the affected, or any prior or subsequent, periods. The errors did not affect any reported amounts in any other component of Trustmark’s consolidated financial statements for the affected, or any prior or subsequent, periods. Trustmark has evaluated the impact of the errors in accordance with FASB ASC Topic 250-10, “Accounting Changes and Error Corrections,” and deemed these changes immaterial to its consolidated financial statements taken as a whole and no restatement of Trustmark’s previously filed consolidated financial statements was required. In addition, Management has identified the cause of the errors and taken steps to prevent a future reoccurrence.

The following table reflects the changes to the Consolidated Statements of Cash Flows for the periods presented ($ in thousands):

		As Reported			Adjustment			As Adjusted
Year Ended December 31, 2013:
Net cash provided by operating activities		$	155,417		$	145,766		$	301,183
Net cash used in investing activities			(113,201	)		(145,766	)		(258,967	)
Net cash provided by financing activities			72,056			-			72,056
Increase in cash and cash equivalents			114,272			-			114,272
Cash and cash equivalents at beginning of year			231,489			-			231,489
Cash and cash equivalents at end of year		$	345,761		$	-		$	345,761

Year Ended December 31, 2012:
Net cash provided by operating activities		$	92,125		$	20,152		$	112,277
Net cash provided by (used in) investing activities			193,891			(20,152	)		173,739
Net cash used in financing activities			(257,152	)		-			(257,152	)
Increase in cash and cash equivalents			28,864			-			28,864
Cash and cash equivalents at beginning of year			202,625			-			202,625
Cash and cash equivalents at end of year		$	231,489		$	-		$	231,489

Per Share Data

Trustmark accounts for per share data in accordance with FASB ASC Topic 260, “Earnings Per Share,” which provides that unvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are participating securities and shall be included in the computation of earnings per share (EPS) pursuant to the two-class method. Trustmark has determined that its outstanding unvested stock awards and deferred stock units are not participating securities. Based on this determination, no change has been made to Trustmark’s current computation for basic and diluted EPS.

Basic EPS is computed by dividing net income by the weighted-average shares of common stock outstanding. Diluted EPS is computed by dividing net income by the weighted-average shares of common stock outstanding, adjusted for the effect of potentially dilutive stock awards outstanding during the period.

The following table reflects weighted-average shares used to calculate basic and diluted EPS for the periods presented (in thousands):

		Years Ended December 31,
		2014			2013			2012
Basic shares			67,434			66,897			64,659
Dilutive shares			160			176			192
Diluted shares			67,594			67,073			64,851

Weighted-average antidilutive stock awards were excluded in determining diluted EPS. The following table reflects weighted-average antidilutive stock awards for the periods presented (in thousands):

		Years Ended December 31,
		2014			2013			2012

Weighted-average antidilutive stock awards			32			333			653

Fair Value Measurements

FASB ASC Topic 820, “Fair Value Measurements and Disclosures,” defines fair value, establishes a framework for measuring fair value in generally accepted accounting principles, and requires certain disclosures about fair value measurements. The fair value of an asset or liability is the price that would be received to sell that asset or paid to transfer that liability in an orderly transaction occurring in the principal market (or most advantageous market in the absence of a principal market) for such asset or liability. Depending on the nature of the asset or liability, Trustmark uses various valuation techniques and assumptions when estimating fair value. Inputs to valuation techniques include the assumptions that market participants would use in pricing an asset or liability. FASB ASC Topic 820 establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows:

Level 1 Inputs – Valuation is based upon quoted prices (unadjusted) in active markets for identical assets or liabilities that Trustmark has the ability to access at the measurement date.

Level 2 Inputs – Valuation is based upon quoted prices in active markets for similar assets or liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability such as interest rates, yield curves, volatilities and default rates and inputs that are derived principally from or corroborated by observable market data.

Level 3 Inputs – Unobservable inputs reflecting the reporting entity’s own determination about the assumptions that market participants would use in pricing the asset or liability based on the best information available.

In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the fair value measurement in its entirety is classified is based on the lowest level input that is significant to the fair value measurement in its entirety. Trustmark’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.

Accounting Policies Recently Adopted and Pending Accounting Pronouncements
ASU 2014-14, “Receivables – Troubled Debt Restructurings by Creditors (Subtopic 310-40): Classification of Certain Government-Guaranteed Residential Mortgage Loans upon Foreclosure (a consensus of the FASB Emerging Issues Task Force).” Issued in August 2014, ASU 2014-14 requires that a mortgage loan be derecognized and that a separate other receivable be recognized upon foreclosure if (1) the loan has a government guarantee that is not separable from the loan before foreclosure; (2) at the time of foreclosure, the creditor has the intent to convey the real estate property to the guarantor and make a claim on the guarantee, and the creditor has the ability to recover under the claim; and (3) at the time of foreclosure, any amount of the claim that is determined on the basis of the fair value of the real estate is fixed. ASU 2014-14 also provides that upon foreclosure, the separate other receivable would be measured based on the current amount of the loan balance (principal and interest) expected to be recovered under the guarantee. The amendments of ASU 2014-14 are effective for interim and annual periods beginning after December 15, 2014, and may be applied using either a modified retrospective transition method or a prospective transition method as described in ASU 2014-14. The adoption of ASU 2014-14 is not expected to have a material impact to Trustmark’s consolidated financial statements.

ASU 2014-11, “Transfers and Servicing (Topic 860) – Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures.” Issued in June 2014, ASU 2014-11 changes the accounting for repurchase-to-maturity transactions to secured borrowing accounting, and for repurchase financing arrangements requires separate accounting for a transfer of a financial asset executed contemporaneously with a repurchase agreement with the same counterparty, which will result in secured borrowing accounting for the repurchase agreement. ASU 2014-11 also requires disclosures for certain transactions comprising a transfer of a financial asset accounted for as a sale and an agreement with the same transferee entered into in contemplation of the initial transfer that results in the transferor retaining substantially all of the exposure to the economic return on the transferred financial asset throughout the term of the transaction. ASU 2014-11 requires interim and annual disclosures for repurchase agreements, securities lending transactions and repurchase-to-maturity transactions that are accounted for as secured borrowings, which include a disaggregation of the gross obligation by class of collateral pledged; the remaining contractual tenor of the agreements; and a discussion of the potential risks associated with the agreements and the related collateral pledged, including obligations arising from a decline in the fair value of the collateral pledged and how those risks are managed. The accounting changes and disclosure requirements for certain transactions accounted for as a sale in ASU 2014-11 are effective for interim and annual periods beginning after December 15, 2014. The disclosures for transactions accounted for as secured borrowings are required to be presented for annual periods beginning after December 15, 2014, and for interim periods beginning after March 15, 2015. Trustmark currently accounts for its repurchase agreements as secured borrowings; therefore, the adoption of ASU 2014-11 will be a change in presentation only for the newly required disclosures and will not have a material impact to Trustmark’s consolidated financial statements.

ASU 2014-09, “Revenue from Contracts with Customers (Topic 606).” Issued in May 2014, ASU 2014-09 will add FASB ASC Topic 606, “Revenue from Contracts with Customers,” and will supersede revenue recognition requirements in FASB ASC Topic 605, “Revenue Recognition,” as well as certain cost guidance in FASB ASC Topic 605-35, “Revenue Recognition – Construction-Type and Production-Type Contracts.” ASU 2014-09 provides a framework for revenue recognition that replaces the existing industry and transaction specific requirements under the existing standards. ASU 2014-09 requires an entity to apply a five-step model to determine when to recognize revenue and at what amount. The model specifies that revenue should be recognized when (or as) an entity transfers control of goods or services to a customer at the amount in which the entity expects to be entitled. Depending on whether certain criteria are met, revenue should be recognized either over time, in a manner that depicts the entity’s performance, or at a point in time, when control of the goods or services are transferred to the customer. ASU 2014-09 provides that an entity should apply the following steps: (1) identify the contract(s) with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when, or as, the entity satisfies a performance obligation. In addition, the existing requirements for the recognition of a gain or loss on the transfer of non-financial assets that are not in a contract with a customer are amended to be consistent with the guidance on recognition and measurement in ASU 2014-09. The amendments of ASU 2014-09 are effective for interim and annual periods beginning after December 15, 2016, and may be applied either retrospectively to each prior reporting period presented or retrospectively with the cumulative effect of initially applying ASU 2014-09 recognized at the date of initial application. If the transition method of application is elected, the entity should also provide the additional disclosures in reporting periods that include the date of initial application of (1) the amount by which each financial statement line item is affected in the current reporting period, as compared to the guidance that was in effect before the change, and (2) an explanation of the reasons for significant changes. Management is currently evaluating the impact this ASU will have on Trustmark’s consolidated financial statements as well as the most appropriate method of application; however, regardless of the method of application selected, the adoption of ASU 2014-09 is not expected to have a material impact to Trustmark’s consolidated financial statements.

ASU 2014-04, “Receivables – Troubled Debt Restructurings by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure (a consensus of the FASB Emerging Issues Task Force).” Issued in January 2014, ASU 2014-04 clarifies when an “in substance repossession or foreclosure” occurs, that is, when a creditor should be considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loans, such that all or a portion of the loan should be derecognized and the real estate property recognized. ASU 2014-04 states that a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure, or the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. The amendments of ASU 2014-04 also require interim and annual disclosure of both the amount of foreclosed residential real estate property held by the creditor and the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure. The amendments of ASU 2014-04 are effective for interim and annual periods beginning after December 15, 2014, and may be applied using either a modified retrospective transition method or a prospective transition method as described in ASU 2014-04. For Trustmark, the adoption of ASU 2014-04 will result in a change in presentation only for the newly required disclosures and is not expected to have a material impact to Trustmark’s consolidated financial statements.

ASU 2014-01, “Investments – Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Qualified Affordable Housing Projects (a consensus of the FASB Emerging Issues Task Force).” Issued in January 2014, ASU 2014-01 permits reporting entities that invest in qualified affordable housing projects to elect to account for those investments using the “proportional amortization method” if certain conditions are met. Under this method, an entity amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). The decision to apply the proportional amortization method of accounting is an accounting policy decision and should be applied consistently to all qualifying affordable housing project investments. ASU 2014-01 should be applied retrospectively to all periods presented and is effective for annual and interim reporting periods beginning after December 15, 2014. Trustmark currently accounts for its tax credit investments utilizing the equity method of accounting and does not have a significant amount of investments in qualified affordable housing projects that qualify for the low income housing tax credit. At this time, Trustmark does not intend to elect the proportional amortization method of accounting for its investments in low income housing tax credits; however, management will review any future investments in qualified affordable housing projects to determine if the investments meet the conditions required for using the proportional amortization method of accounting and make a decision regarding the accounting policy. The adoption of ASU 2014-01 is not expected to have a material impact to Trustmark’s consolidated financial statements.

ASU 2013-11, “Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (a consensus of the FASB Emerging Issues Task Force).” Issued in July 2013, ASU 2013-11 provides that an entity’s unrecognized tax benefit, or a portion of its unrecognized tax benefit, should be presented in its financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, with one exception. The exception states that to the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position, or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. ASU 2013-11 applies prospectively for all entities that have unrecognized tax benefits when a net operating loss carryforward, a similar tax loss, or tax credit carryforward exists at the reporting date. ASU 2013-11 became effective for Trustmark’s financial statements on January 1, 2014, and the adoption did not have a material impact to Trustmark’s consolidated financial statements.

Business_Combinations

Business Combinations	12 Months Ended
Business Combinations	Dec. 31, 2014
Business Combinations [Abstract]
Business Combinations	Note 2 – Business Combinations

	Somerville Bank & Trust Company

	Immediately following the close of business on December 31, 2013, Trustmark National Bank (TNB), a subsidiary of Trustmark, completed its merger with Somerville Bank & Trust Company (Somerville), also a subsidiary of Trustmark, with TNB as the surviving entity in the merger. Somerville, headquartered in Somerville, Tennessee, provided banking services in the eastern Memphis metropolitan statistical area through five offices. At December 31, 2013, Somerville had total assets of $219.6 million. TNB and Somerville were both wholly owned subsidiaries of Trustmark; as such, the merger represented a business reorganization between affiliates under common control.

	Oxford, Mississippi Branches

	On July 26, 2013, TNB completed its acquisition of two branches of SOUTHBank, F.S.B. (SOUTHBank), located in Oxford, Mississippi. As a result of this acquisition, TNB assumed deposit accounts of approximately $11.7 million in addition to purchasing the two physical branch offices. The transaction was not material to Trustmark’s consolidated financial statements and was not considered a business combination in accordance with FASB ASC Topic 805.

	BancTrust Financial Group, Inc.

	On February 15, 2013, Trustmark completed its merger with BancTrust Financial Group, Inc. (BancTrust), a 26-year-old bank holding company headquartered in Mobile, Alabama. In accordance with the terms of the definitive agreement, the holders of BancTrust common stock received 0.125 of a share of Trustmark common stock for each share of BancTrust common stock in a tax-free exchange. Trustmark issued approximately 2.24 million shares of its common stock for all issued and outstanding shares of BancTrust common stock. The total value of the 2.24 million shares of Trustmark common stock issued to the BancTrust shareholders on the merger date was approximately $53.5 million, based on a closing stock price of $23.83 per share of Trustmark common stock on February 15, 2013. At closing, Trustmark repurchased the $50.0 million of BancTrust preferred stock and associated warrant issued to the U.S. Department of Treasury under the Capital Purchase Program for approximately $52.6 million.

	The merger with BancTrust was consistent with Trustmark’s strategic plan to selectively expand the Trustmark franchise. The merger provided Trustmark entry into more than 15 markets in Alabama and enhanced the Trustmark franchise in the Florida Panhandle.

	This merger was accounted for under the acquisition method in accordance with FASB ASC Topic 805. Accordingly, the assets and liabilities, both tangible and intangible, were recorded at their estimated fair values as of the merger date.

	Trustmark recorded fair value adjustments based on the estimated fair value of certain acquired loans, premises and equipment, net and other real estate. During 2013, these measurement period adjustments resulted in a decrease in acquired noncovered loans of $6.8 million, a decrease in premises and equipment, net of $627 thousand, a decrease in other real estate of $2.6 million, an increase in the deferred tax asset of $3.4 million and an increase in goodwill of $6.3 million. Trustmark also recorded an adjustment to transfer $1.6 million of acquired property from premises and equipment, net to other real estate during 2013. During the first quarter of 2014, Trustmark recorded an additional measurement period adjustment that resulted in a $7.4 million decrease in goodwill with a corresponding increase in the deferred tax asset. These measurement period adjustments were presented on a retrospective basis, consistent with applicable accounting guidance. The purchase price allocation was finalized during the first quarter of 2014.

	The statement of assets purchased and liabilities assumed in the BancTrust merger is presented below at their adjusted estimated fair values as of the merger date of February 15, 2013 ($ in thousands):

	Assets:
	Cash and due from banks		$	141,616
	Securities available for sale			528,016
	Loans held for sale			1,050
	Acquired noncovered loans			944,235
	Premises and equipment, net			54,952
	Identifiable intangible assets			33,498
	Other real estate			40,103
	Other assets			109,423
	Total Assets			1,852,893

	Liabilities:
	Deposits			1,740,254
	Other borrowings			64,051
	Other liabilities			16,761
	Total Liabilities			1,821,066

	Net identified assets acquired at fair value			31,827
	Goodwill			74,247
	Net assets acquired at fair value		$	106,074

	The excess of the consideration paid over the estimated fair value of the net assets acquired was $74.2 million, which was recorded as goodwill under FASB ASC Topic 805. The identifiable intangible assets acquired represent the core deposit intangible at fair value at the acquisition date. The core deposit intangible is being amortized on an accelerated basis over the estimated useful life, currently expected to be approximately 10 years.

	Loans, excluding LHFS, acquired from BancTrust were evaluated under a fair value process involving various degrees of deterioration in credit quality since origination, and also for those loans for which it was probable at acquisition that Trustmark would not be able to collect all contractually required payments. These loans, with the exception of revolving credit agreements and leases, are referred to as acquired impaired loans and are accounted for in accordance with FASB ASC Topic 310-30. Refer to Note 6 – Acquired Loans for further information on acquired loans.

	The operations of BancTrust are included in Trustmark’s operating results from February 15, 2013. Trustmark’s noninterest expense during the first quarter of 2013 included non-routine BancTrust transaction expenses totaling approximately $9.4 million (change in control and severance expense of $1.4 million included in salaries and benefits; professional fees, contract termination and other expenses of $7.9 million included in other expense).

	Bay Bank & Trust Company

	On March 16, 2012, Trustmark completed its merger with Bay Bank & Trust Co. (Bay Bank), a 76-year old financial institution headquartered in Panama City, Florida. Trustmark acquired all outstanding common stock of Bay Bank for approximately $22 million in cash and stock, comprised of $10 million in cash and the issuance of approximately 510 thousand shares of Trustmark common stock valued at $12 million. This merger was accounted for under the acquisition method in accordance with FASB ASC Topic 805. Accordingly, the assets and liabilities, both tangible and intangible, are recorded at their estimated fair values as of the merger date. The purchase price allocation was finalized in the second quarter of 2012.

	The statement of assets purchased and liabilities assumed in the Bay Bank merger is presented below at their estimated fair values as of the merger date of March 16, 2012 ($ in thousands):

	Assets:
	Cash and due from banks		$	88,154
	Securities available for sale			26,369
	Acquired noncovered loans			97,914
	Premises and equipment, net			9,466
	Identifiable intangible assets			7,017
	Other real estate			2,569
	Other assets			3,471
	Total Assets			234,960

Liabilities:
Deposits			208,796
Other liabilities			526
Total Liabilities			209,322

Net assets acquired at fair value			25,638
Consideration paid to Bay Bank			22,003

Bargain purchase gain			3,635
Income taxes			-
Bargain purchase gain, net of taxes		$	3,635

The bargain purchase gain represents the excess of the net of the estimated fair value of the assets acquired and liabilities assumed over the consideration paid to Bay Bank. Initially, Trustmark recognized a bargain purchase gain of $2.8 million during the first quarter of 2012 and subsequently increased the bargain purchase gain by $881 thousand during the second quarter of 2012 as the fair values associated with the Bay Bank acquisition were finalized. The gain of $3.6 million recognized by Trustmark was considered a gain from a bargain purchase under FASB ASC Topic 805 and was included in other noninterest income for 2012. Included in noninterest expense for 2012 are non-routine Bay Bank transaction expenses totaling approximately $2.6 million (change in control and severance expense of $672 thousand included in salaries and benefits; contract termination and other expenses of $1.9 million included in other expense).

The identifiable intangible assets represent the core deposit intangible at fair value at the acquisition date. The core deposit intangible is being amortized on an accelerated basis over the estimated useful life, currently expected to be approximately 10 years.

Loans acquired from Bay Bank were evaluated under a fair value process involving various degrees of deterioration in credit quality since origination, and also for those loans for which it was probable at acquisition that Trustmark would not be able to collect all contractually required payments. These loans, with the exception of revolving credit agreements, are referred to as acquired impaired loans and are accounted for in accordance with FASB ASC Topic 310-30.

Fair Value of Acquired Financial Instruments

For financial instruments measured at fair value, Trustmark utilized Level 2 inputs to determine the fair value of securities available for sale, time deposits (included in deposits above) and FHLB advances (shown as other borrowings above). Level 3 inputs were used to determine the fair value of acquired loans, identifiable intangible assets and other real estate. The methodology and significant assumptions used in estimating the fair values of these financial assets and liabilities are as follows:

Securities Available for Sale

Estimated fair values for securities available for sale are based on quoted market prices where available. If quoted market prices are not available, estimated fair values are based on quoted market prices of comparable instruments.

Acquired Loans

Fair value of acquired loans is determined using a discounted cash flow model based on assumptions regarding the amount and timing of principal and interest payments, estimated prepayments, estimated default rates, estimated loss severity in the event of defaults and current market rates.

Identifiable Intangible Assets

The fair value assigned to the identifiable intangible assets, in this case core deposit intangibles, represent the future economic benefit of the potential cost savings from acquiring core deposits in the acquisition compared to the cost of obtaining alternative funding from market sources.

Other Real Estate

Other real estate was initially recorded at its estimated fair value on the acquisition date based on similar market comparable valuations less estimated selling costs.

Time Deposits

Time deposits were valued by projecting expected cash flows into the future based on each account’s contracted rate and then determining the present value of those expected cash flows using current rates for deposits with similar maturities.

FHLB Advances

FHLB advances were valued by projecting expected cash flows into the future based on each advance’s contracted rate and then determining the present value of those expected cash flows using current rates for advances with similar maturities.

Please refer to Note 19 – Fair Value for more information on Trustmark’s classification of financial instruments based on valuation inputs within the fair value hierarchy.

Cash_and_Due_from_Banks

Cash and Due from Banks	12 Months Ended
Cash and Due from Banks	Dec. 31, 2014
Cash and Due from Banks [Abstract]
Cash and Due from Banks	Note 3 – Cash and Due from Banks

	Trustmark is required to maintain average reserve balances with the FRB of Atlanta based on a percentage of deposits. The average amounts of those reserves for the years ended December 31, 2014 and 2013 were $75.6 million and $57.6 million, respectively.

Securities_Available_for_Sale_

Securities Available for Sale and Held to Maturity	12 Months Ended
Securities Available for Sale and Held to Maturity	Dec. 31, 2014
Securities Available for Sale and Held to Maturity [Abstract]
Securities Available for Sale and Held to Maturity			Securities Available for Sale															Securities Held to Maturity
	31-Dec-14		Amortized			Gross				Gross				Estimated				Amortized			Gross			Gross			Estimated
			Cost			Unrealized				Unrealized				Fair				Cost			Unrealized			Unrealized			Fair
						Gains				(Losses)				Value							Gains			(Losses)			Value
	U.S. Treasury securities		$	100		$	-			$	-			$	100			$	-		$	-		$	-		$	-
	U.S. Government agency obligations
	Issued by U.S. Government agencies			79,788			694				(826	)			79,656				-			-			-			-
	Issued by U.S. Government sponsored agencies			32,725			170				(77	)			32,818				100,971			2,631			-			103,602
	Obligations of states and political subdivisions			157,001			5,325				(68	)			162,258				63,505			3,398			-			66,903
	Mortgage-backed securities
	Residential mortgage pass-through securities
	Guaranteed by GNMA			11,897			544				(14	)			12,427				19,115			466			(16	)		19,565
	Issued by FNMA and FHLMC			199,599			4,842				-				204,441				11,437			471			-			11,908
	Other residential mortgage-backed securities
	Issued or guaranteed by FNMA, FHLMC or GNMA			1,655,733			16,664				(10,564	)			1,661,833				834,176			6,440			(1,916	)		838,700
	Commercial mortgage-backed securities
	Issued or guaranteed by FNMA, FHLMC or GNMA			184,394			4,968				(28	)			189,334				141,481			1,750			(1,063	)		142,168
	Asset-backed securities and structured financial products			30,776			924				-				31,700				-			-			-			-
	Total		$	2,352,013		$	34,131			$	(11,577	)		$	2,374,567			$	1,170,685		$	15,156		$	(2,995	)	$	1,182,846

	31-Dec-13
	U.S. Treasury securities		$	501		$	1			$	-			$	502			$	-		$	-		$	-		$	-
	U.S. Government agency obligations
	Issued by U.S. Government agencies			129,653			1,125				(1,485	)			129,293				-			-			-			-
	Issued by U.S. Government sponsored agencies			40,681			19				(521	)			40,179				100,159			-			(1,580	)		98,579
	Obligations of states and political subdivisions			165,810			6,243				(315	)			171,738				65,987			2,806			(281	)		68,512
	Mortgage-backed securities
	Residential mortgage pass-through securities
	Guaranteed by GNMA			14,099			459				(84	)			14,474				9,433			142			(72	)		9,503
	Issued by FNMA and FHLMC			239,880			3,147				(1,909	)			241,118				12,724			30			(162	)		12,592
	Other residential mortgage-backed securities
	Issued or guaranteed by FNMA, FHLMC or GNMA			1,300,375			12,459				(22,093	)			1,290,741				837,393			-			(15,072	)		822,321
	Commercial mortgage-backed securities
	Issued or guaranteed by FNMA, FHLMC or GNMA			235,317			7,278				(423	)			242,172				143,032			85			(3,791	)		139,326
	Asset-backed securities and structured financial products			62,689			1,248				-				63,937				-			-			-			-
	Total		$	2,189,005		$	31,979			$	(26,830	)		$	2,194,154			$	1,168,728		$	3,063		$	(20,958	)	$	1,150,833

	During the fourth quarter of 2013, Trustmark reclassified approximately $1.099 billion of securities available for sale to securities held to maturity. The securities were transferred at fair value, which became the cost basis for the securities held to maturity. At the date of transfer, the net unrealized holding loss on the available for sale securities totaled approximately $46.6 million ($28.8 million, net of tax). The net unrealized holding loss is amortized over the remaining life of the securities as a yield adjustment in a manner consistent with the amortization or accretion of the original purchase premium or discount on the associated security. There were no gains or losses recognized as a result of the transfer. At December 31, 2014, the net unamortized, unrealized loss on the transferred securities included in accumulated other comprehensive loss in the accompanying balance sheet totaled approximately $40.4 million ($24.9 million, net of tax).

	During the fourth quarter of 2013, Trustmark sold $135.6 million of Collateralized Loan Obligations (CLO) securities generating a net gain of $1.3 million. These securities were identified as available for sale and had been carried in the asset-backed securities and structured financial products line item in the table shown above. During the first quarter of 2014, Trustmark sold its remaining $25.9 million of CLO securities generating a net gain of $389 thousand.

	Temporarily Impaired Securities

	The table below includes securities with gross unrealized losses segregated by length of impairment at December 31, 2014 and 2013 ($ in thousands):

			Less than 12 Months							12 Months or More								Total
	31-Dec-14		Estimated			Gross				Estimated				Gross				Estimated			Gross
			Fair Value			Unrealized				Fair Value				Unrealized				Fair Value			Unrealized
						Losses								Losses							Losses
	U.S. Government agency obligations
	Issued by U.S. Government agencies		$	19,220		$	(115	)		$	32,656			$	(711	)		$	51,876		$	(826	)
	Issued by U.S. Government sponsored agencies			9,948			(52	)			9,956				(25	)			19,904			(77	)
	Obligations of states and political subdivisions			8,431			(22	)			3,800				(46	)			12,231			(68	)
	Mortgage-backed securities
	Residential mortgage pass-through securities
	Guaranteed by GNMA			7,199			(22	)			647				(8	)			7,846			(30	)
	Other residential mortgage-backed securities
	Issued or guaranteed by FNMA, FHLMC or GNMA			537,033			(2,449	)			395,342				(10,031	)			932,375			(12,480	)
	Commercial mortgage-backed securities
	Issued or guaranteed by FNMA, FHLMC or GNMA			9,134			(3	)			79,829				(1,088	)			88,963			(1,091	)
	Total		$	590,965		$	(2,663	)		$	522,230			$	(11,909	)		$	1,113,195		$	(14,572	)

	31-Dec-13
	U.S. Government agency obligations
Issued by U.S. Government agencies		$	68,908		$	(1,485	)		$	-			$	-			$	68,908		$	(1,485	)
Issued by U.S. Government sponsored agencies			138,478			(2,101	)			-				-				138,478			(2,101	)
Obligations of states and political subdivisions			55,963			(586	)			796				(10	)			56,759			(596	)
Mortgage-backed securities
Residential mortgage pass-through securities
Guaranteed by GNMA			14,732			(155	)			161				(1	)			14,893			(156	)
Issued by FNMA and FHLMC			118,466			(2,071	)			-				-				118,466			(2,071	)
Other residential mortgage-backed securities
Issued or guaranteed by FNMA, FHLMC or GNMA			1,534,381			(36,750	)			23,458				(415	)			1,557,839			(37,165	)
Commercial mortgage-backed securities
Issued or guaranteed by FNMA, FHLMC or GNMA			177,412			(4,214	)			-				-				177,412			(4,214	)
Total		$	2,108,340		$	(47,362	)		$	24,415			$	(426	)		$	2,132,755		$	(47,788	)

The unrealized losses shown above are due to increases in market rates over the yields available at the time of purchase of the underlying securities and not credit quality. Because Trustmark does not intend to sell these securities and it is more likely than not that Trustmark will not be required to sell the investments before recovery of their amortized cost bases, which may be maturity, Trustmark does not consider these investments to be other-than-temporarily impaired at December 31, 2014. There were no other-than-temporary impairments for the years ended December 31, 2014, 2013 and 2012.

Security Gains and Losses

For the periods presented, gains and losses as a result of calls and dispositions of securities, as well as any associated proceeds, were as follows ($ in thousands):

		Years Ended December 31,
Available for Sale		2014			2013				2012
Proceeds from calls and sales of securities		$	56,815		$	224,853			$	38,364
Gross realized gains			456			1,680				1,052
Gross realized losses			(156	)		(1,195	)			(2	)

Held to Maturity
Proceeds from calls of securities		$	-		$	-			$	335
Gross realized gains			-			-				9

Securities Pledged

Securities with a carrying value of $2.457 billion and $2.475 billion at December 31, 2014 and 2013, respectively, were pledged to collateralize public deposits and securities sold under repurchase agreements and for other purposes as permitted by law. Of the amount pledged at December 31, 2014, $6.0 million was pledged to the FRB of Atlanta under the Federal Reserve Discount Window program to provide additional contingency funding capacity. At year-end, these securities were not required to collateralize any borrowings from the FRB of Atlanta.

Contractual Maturities

The amortized cost and estimated fair value of securities available for sale and held to maturity at December 31, 2014, by contractual maturity, are shown below ($ in thousands). Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

		Securities							Securities
		Available for Sale							Held to Maturity
					Estimated								Estimated
		Amortized			Fair				Amortized				Fair
		Cost			Value				Cost				Value
Due in one year or less		$	18,088		$	18,236			$	2,496			$	2,513
Due after one year through five years			137,976			142,016				11,693				12,298
Due after five years through ten years			61,738			63,811				137,991				142,604
Due after ten years			82,588			82,469				12,296				13,090
			300,390			306,532				164,476				170,505
Mortgage-backed securities			2,051,623			2,068,035				1,006,209				1,012,341
Total		$	2,352,013		$	2,374,567			$	1,170,685			$	1,182,846

Loans_Held_for_Investment_LHFI

Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI	12 Months Ended
	Dec. 31, 2014
Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI [Abstract]
Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI	Note 5 – LHFI and Allowance for Loan Losses, LHFI

	At December 31, 2014 and 2013, LHFI consisted of the following ($ in thousands):

			2014			2013
	Loans secured by real estate:
	Construction, land development and other land		$	619,877		$	596,889
	Secured by 1-4 family residential properties			1,634,397			1,485,564
	Secured by nonfarm, nonresidential properties			1,553,193			1,415,139
	Other			253,787			189,362
	Commercial and industrial loans			1,270,350			1,157,614
	Consumer loans			167,964			165,308
	Other loans			949,901			789,005
	LHFI			6,449,469			5,798,881
	Less allowance for loan losses, LHFI			69,616			66,448
	Net LHFI		$	6,379,853		$	5,732,433

	Loan Concentrations

	Trustmark does not have any loan concentrations other than those reflected in the preceding table, which exceed 10% of total LHFI. At December 31, 2014, Trustmark's geographic loan distribution was concentrated primarily in its five key market regions: Alabama, Florida, Mississippi, Tennessee and Texas. Accordingly, the ultimate collectability of a substantial portion of these loans and the recovery of a substantial portion of the carrying amount of other real estate are susceptible to changes in market conditions in these areas.

	Related Party Loans

	Trustmark makes loans in the normal course of business to certain executive officers and directors, including their immediate families and companies in which they are principal owners. Such loans are made on substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with unrelated persons and do not involve more than the normal risk of collectability at the time of the transaction. At December 31, 2014 and 2013, total loans to these borrowers were $95.2 million and $89.0 million, respectively. During 2014, $643.1 million of new loan advances were made, while repayments were $636.5 million. In addition, decreases in loans due to changes in executive officers and directors totaled $372 thousand.

	Nonaccrual/Impaired LHFI

	At December 31, 2014 and December 31, 2013, the carrying amounts of nonaccrual LHFI, which are individually evaluated for impairment, were $79.3 million and $65.2 million, respectively. Of this total, all commercial nonaccrual LHFI over $500 thousand were specifically evaluated for impairment (specifically evaluated impaired LHFI) using a fair value approach. The remaining nonaccrual LHFI were not specifically reviewed and not written down to fair value less cost to sell. No material interest income was recognized in the income statement on impaired or nonaccrual LHFI for each of the years in the three-year period ended December 31, 2014.

	All of Trustmark’s specifically evaluated impaired LHFI are collateral dependent loans. At December 31, 2014 and December 31, 2013, specifically evaluated impaired LHFI totaled $47.1 million and $31.6 million, respectively. These specifically evaluated impaired LHFI had a related allowance of $11.3 million and $2.2 million at the end of the respective periods. For collateral dependent loans, when a loan is deemed impaired the full difference between the carrying amount of the loan and the most likely estimate of the collateral’s fair value less cost to sell is charged off. Charge-offs related to specifically evaluated impaired LHFI totaled $137 thousand, $2.5 million and $13.1 million for 2014, 2013 and 2012, respectively. Provision expense on specifically evaluated impaired LHFI totaled $3.5 million for 2014, compared to provision recapture of $2.9 million for 2013 and provision expense of $1.1 million for 2012.

	Fair value estimates for specifically evaluated impaired LHFI are derived from appraised values based on the current market value or as is value of the collateral, normally from recently received and reviewed appraisals. Current appraisals are ordered on an annual basis based on the inspection date. Appraisals are obtained from state-certified appraisers and are based on certain assumptions, which may include construction or development status and the highest and best use of the property. These appraisals are reviewed by Trustmark’s Appraisal Review Department to ensure they are acceptable, and values are adjusted down for costs associated with asset disposal. Once this estimated net realizable value has been determined, the value used in the impairment assessment is updated. At the time a specifically evaluated impaired LHFI is deemed to be impaired, the full difference between book value and the most likely estimate of the collateral’s net realizable value is charged off. As subsequent events dictate and estimated net realizable values decline, required reserves may be established or further adjustments recorded.

	At December 31, 2014 and December 31, 2013, nonaccrual LHFI not specifically reviewed for impairment and not written down to fair value less cost to sell, totaled $32.2 million and $33.7 million, respectively. In addition, these nonaccrual LHFI had allocated allowance for loan losses of $1.5 million and $3.0 million at the end of the respective periods.

	The following table details LHFI individually and collectively evaluated for impairment at December 31, 2014 and 2013 ($ in thousands):

			31-Dec-14
			LHFI Evaluated for Impairment
			Individually			Collectively			Total
	Loans secured by real estate:
	Construction, land development and other land		$	13,867		$	606,010		$	619,877
	Secured by 1-4 family residential properties			25,621			1,608,776			1,634,397
	Secured by nonfarm, nonresidential properties			25,717			1,527,476			1,553,193
	Other			1,318			252,469			253,787
	Commercial and industrial loans			12,104			1,258,246			1,270,350
	Consumer loans			88			167,876			167,964
	Other loans			628			949,273			949,901
	Total		$	79,343		$	6,370,126		$	6,449,469


			31-Dec-13
			LHFI Evaluated for Impairment
			Individually			Collectively			Total
	Loans secured by real estate:
	Construction, land development and other land		$	13,327		$	583,562		$	596,889
	Secured by 1-4 family residential properties			21,603			1,463,961			1,485,564
	Secured by nonfarm, nonresidential properties			21,809			1,393,330			1,415,139
	Other			1,327			188,035			189,362
	Commercial and industrial loans			6,286			1,151,328			1,157,614
	Consumer loans			151			165,157			165,308
	Other loans			735			788,270			789,005
	Total		$	65,238		$	5,733,643		$	5,798,881

At December 31, 2014 and 2013, the carrying amount of LHFI individually evaluated for impairment consisted of the following ($ in thousands):

		31-Dec-14
		LHFI
		Unpaid			With No Related			With an			Total					Average
		Principal			Allowance			Allowance			Carrying			Related		Recorded
		Balance			Recorded			Recorded			Amount			Allowance		Investment
Loans secured by real estate:
Construction, land development and other land		$	20,849		$	7,411		$	6,456		$	13,867		$	2,767	$	13,597
Secured by 1-4 family residential properties			31,151			1,650			23,971			25,621			450		23,612
Secured by nonfarm, nonresidential properties			27,969			12,868			12,849			25,717			2,787		23,763
Other			1,594			-			1,318			1,318			52		1,322
Commercial and industrial loans			13,916			1,206			10,898			12,104			6,449		9,195
Consumer loans			152			-			88			88			-		120
Other loans			734			-			628			628			259		682
Total		$	96,365		$	23,135		$	56,208		$	79,343		$	12,764	$	72,291

		31-Dec-13
		LHFI
		Unpaid			With No Related			With an			Total					Average
		Principal			Allowance			Allowance			Carrying			Related		Recorded
		Balance			Recorded			Recorded			Amount			Allowance		Investment
Loans secured by real estate:
Construction, land development and other land		$	24,350		$	9,817		$	3,510		$	13,327		$	989	$	20,216
Secured by 1-4 family residential properties			26,541			3,095			18,508			21,603			191		24,359
Secured by nonfarm, nonresidential properties			24,879			10,225			11,584			21,809			2,307		20,049
Other			1,375			-			1,327			1,327			122		2,641
Commercial and industrial loans			8,702			2,506			3,780			6,286			1,253		5,513
Consumer loans			286			-			151			151			2		255
Other loans			849			-			735			735			317		767
Total		$	86,982		$	25,643		$	39,595		$	65,238		$	5,181	$	73,800

A troubled debt restructuring (TDR) occurs when a borrower is experiencing financial difficulties, and for related economic or legal reasons, a concession is granted to the borrower that Trustmark would not otherwise consider. Whatever the form of concession that might be granted by Trustmark, Management’s objective is to enhance collectibility by obtaining more cash or other value from the borrower or by increasing the probability of receipt by granting the concession than by not granting it. Other concessions may arise from court proceedings or may be imposed by law. In addition, TDRs also include those credits that are extended or renewed to a borrower who is not able to obtain funds from sources other than Trustmark at a market interest rate for new debt with similar risk.

A formal TDR may include, but is not necessarily limited to, one or a combination of the following situations:

	·	Trustmark accepts a third-party receivable or other asset(s) of the borrower, in lieu of the receivable from the borrower.
	·	Trustmark accepts an equity interest in the borrower in lieu of the receivable.
	·	Trustmark accepts modification of the terms of the debt including but not limited to:
	o	Reduction of (absolute or contingent) the stated interest rate to below the current market rate.
	o	Extension of the maturity date or dates at a stated interest rate lower than the current market rate for new debt with similar risk.
	o	Reduction (absolute or contingent) of the face amount or maturity amount of the debt as stated in the note or other agreement.
	o	Reduction (absolute or contingent) of accrued interest.

Troubled debt restructurings are addressed in Trustmark’s loan policy, and in accordance with that policy, any modifications or concessions that may result in a TDR are subject to a special approval process which allows for control, identification, and monitoring of these arrangements. Prior to granting a concession, a revised borrowing arrangement is proposed which is structured so as to improve collectability of the loan in accordance with a reasonable repayment schedule with any loss promptly identified. It is supported by a thorough evaluation of the borrower’s financial condition and prospects for repayment under those revised terms. Other TDRs arising from renewals or extensions of existing debt are routinely identified through the processes utilized in the Problem Loan Committees and in the Credit Quality Review Committee. All TDRs are subsequently reported to the Director Credit Policy Committee on a quarterly basis and are disclosed in Trustmark’s consolidated financial statements in accordance with GAAP and regulatory reporting guidance.

All loans whose terms have been modified in a troubled debt restructuring are evaluated for impairment under FASB ASC Topic 310. Accordingly, Trustmark measures any loss on the restructuring in accordance with that guidance. A TDR in which Trustmark receives physical possession of the borrower’s assets, regardless of whether formal foreclosure or repossession proceedings take place, is accounted for in accordance with FASB ASC Subtopic 310-40, “Troubled Debt Restructurings by Creditors.” Thus, the loan is treated as if assets have been received in satisfaction of the loan and reported as a foreclosed asset.

A TDR may be returned to accrual status if Trustmark is reasonably assured of repayment of principal and interest under the modified terms and the borrower has demonstrated sustained performance under those terms for a period of at least six months. Otherwise, the restructured loan must remain on nonaccrual.

At December 31, 2014, 2013 and 2012, LHFI classified as TDRs totaled $11.3 million, $14.8 million and $24.3 million, respectively, and were primarily comprised of credits with interest-only payments for an extended period of time which totaled $7.4 million, $11.1 million and $21.6 million, respectively. The remaining TDRs at December 31, 2014, 2013 and 2012 resulted from real estate loans discharged through Chapter 7 bankruptcy that were not reaffirmed or from payment or maturity extensions.

For TDRs, Trustmark had a related loan loss allowance of $1.7 million at December 31, 2014, $1.6 million at December 31, 2013 and $4.3 million at December 31, 2012. LHFI classified as TDRs are charged down to the most likely fair value estimate less an estimated cost to sell for collateral dependent loans, which would approximate net realizable value. Specific charge-offs related to TDRs totaled $75 thousand, $816 thousand and $6.0 million for the years ended December 31, 2014, 2013 and 2012, respectively.

The following table illustrates the impact of modifications classified as TDRs as well as those TDRs modified within the last 12 months for which there was a payment default during the period for the years ended December 31, 2014, 2013 and 2012 ($ in thousands):

		Year Ended December 31, 2014
Troubled Debt Restructurings		Number of Contracts			Pre-Modification			Post-Modification
					Outstanding			Outstanding
					Recorded			Recorded
					Investment			Investment
Loans secured by 1-4 family residential properties			17		$	1,248		$	1,234

		Year Ended December 31, 2013
Troubled Debt Restructurings		Number of Contracts			Pre-Modification			Post-Modification
					Outstanding			Outstanding
					Recorded			Recorded
					Investment			Investment
Loans secured by 1-4 family residential properties			10		$	498		$	441
Loans secured by nonfarm, nonresidential properties			1			952			952
Commercial and industrial loans			2			944			937
Other loans			1			2,490			2,490
Total			14		$	4,884		$	4,820

		Year Ended December 31, 2012
Troubled Debt Restructurings		Number of Contracts			Pre-Modification			Post-Modification
					Outstanding			Outstanding
					Recorded			Recorded
					Investment			Investment
Construction, land development and other land loans			12		$	4,092		$	4,092
Loans secured by 1-4 family residential properties			48			5,399			5,383
Loans secured by nonfarm, nonresidential properties			2			1,210			1,210
Other loans secured by real estate			1			199			199
Commercial and industrial loans			1			148			-
Total			64		$	11,048		$	10,884

		Years Ended December 31,
		2014						2013						2012
Troubled Debt Restructurings that Subsequently Defaulted		Number of Contracts			Recorded Investment			Number of Contracts			Recorded Investment			Number of Contracts		Recorded Investment
Construction, land development and other land loans			-		$	-			-		$	-			7	$	1,881
Loans secured by 1-4 family residential properties			1			103			5			345			16		1,469
Loans secured by nonfarm, nonresidential properties			-			-			-			-			1		862
Total			1		$	103			5		$	345			24	$	4,212

Trustmark’s TDRs have resulted primarily from allowing the borrower to pay interest-only for an extended period of time rather than from forgiveness. Accordingly, as shown above, these TDRs have a similar recorded investment for both the pre-modification and post-modification disclosure. Trustmark has utilized loans 90 days or more past due to define payment default in determining TDRs that have subsequently defaulted.

The following tables detail LHFI classified as TDRs by loan type at December 31, 2014, 2013 and 2012 ($ in thousands):

		31-Dec-14
		Accruing			Nonaccrual			Total
Construction, land development and other land loans		$	-		$	3,665		$	3,665
Loans secured by 1-4 family residential properties			1,385			3,733			5,118
Loans secured by nonfarm, nonresidential properties			-			1,854			1,854
Other loans secured by real estate			-			149			149
Commercial and industrial loans			-			509			509
Total TDRs by type		$	1,385		$	9,910		$	11,295

		31-Dec-13
		Accruing			Nonaccrual			Total
Construction, land development and other land loans		$	-		$	6,247		$	6,247
Loans secured by 1-4 family residential properties			1,320			4,201			5,521
Loans secured by nonfarm, nonresidential properties			-			2,292			2,292
Other loans secured by real estate			-			167			167
Commercial and industrial loans			-			549			549
Total TDRs by type		$	1,320		$	13,456		$	14,776

		31-Dec-12
		Accruing			Nonaccrual			Total
Construction, land development and other land loans		$	233		$	12,073		$	12,306
Loans secured by 1-4 family residential properties			1,280			5,908			7,188
Loans secured by nonfarm, nonresidential properties			-			4,582			4,582
Other loans secured by real estate			-			197			197
Total TDRs by type		$	1,513		$	22,760		$	24,273

Credit Quality Indicators

Trustmark’s loan portfolio credit quality indicators focus on six key quality ratios that are compared against bank tolerances. The loan indicators are total classified outstanding, total criticized outstanding, nonperforming loans, nonperforming assets, delinquencies and net loan losses. Due to the homogenous nature of consumer loans, Trustmark does not assign a formal internal risk rating to each credit and therefore the criticized and classified measures are unique to commercial loans.

In addition to monitoring portfolio credit quality indicators, Trustmark also measures how effectively the lending process is being managed and risks are being identified. As part of an ongoing monitoring process, Trustmark grades the commercial portfolio as it relates to credit file completion and financial statement exceptions, underwriting, collateral documentation and compliance with law as shown below:

	·	Credit File Completeness and Financial Statement Exceptions – evaluates the quality and condition of credit files in terms of content, completeness and organization and focuses on efforts to obtain and document sufficient information to determine the quality and status of credits. Also included is an evaluation of the systems/procedures used to insure compliance with policy such as financial statements, review memos and loan agreements.
	·	Underwriting – evaluates whether credits are adequately analyzed, appropriately structured and properly approved within requirements of bank loan policy. A properly approved credit is approved by adequate authority in a timely manner with all conditions of approval fulfilled. Total policy exceptions measure the level of underwriting and other policy exceptions within a loan portfolio.
	·	Collateral Documentation – focuses on the adequacy of documentation to support the obligation, perfect Trustmark’s collateral position and protect collateral value. There are two parts to this measure:
	✓	Collateral exceptions are where certain collateral documentation is either not present, is not considered current or has expired.
	✓	90 days and over collateral exceptions are where certain collateral documentation is either not present, is not considered current or has expired and the exception has been identified in excess of 90 days.
	·	Compliance with Law – focuses on underwriting, documentation, approval and reporting in compliance with banking laws and regulations. Primary emphasis is directed to the Financial Institutions Reform, Recovery and Enforcement Act of 1989 (FIRREA) and Regulation O requirements.

Commercial Credits

Trustmark has established a loan grading system that consists of ten individual credit risk grades (risk ratings) that encompass a range from loans where the expectation of loss is negligible to loans where loss has been established. The model is based on the risk of default for an individual credit and establishes certain criteria to delineate the level of risk across the ten unique credit risk grades. Credit risk grade definitions are as follows:

	·	Risk Rate (RR) 1 through RR 6 – Grades one through six represent groups of loans that are not subject to adverse criticism as defined in regulatory guidance. Loans in these groups exhibit characteristics that represent low to moderate risk measured by using a variety of credit risk criteria such as cash flow coverage, debt service coverage, balance sheet leverage, liquidity, management experience, industry position, prevailing economic conditions, support from secondary sources of repayment and other credit factors that may be relevant to a specific loan. In general, these loans are supported by properly margined collateral and guarantees of principal parties.
	·	Other Assets Especially Mentioned (special mention) - (RR 7) – a loan that has a potential weakness that if not corrected will lead to a more severe rating. This rating is for credits that are currently protected but potentially weak because of an adverse feature or condition that if not corrected will lead to a further downgrade.
	·	Substandard (RR 8) – a loan that has at least one identified weakness that is well defined. This rating is for credits where the primary sources of repayment are not viable at the time of evaluation or where either the capital or collateral is not adequate to support the loan and the secondary means of repayment do not provide a sufficient level of support to offset the identified weakness. Loss potential exists in the aggregate amount of substandard loans but does not necessarily exist in individual loans.
	·	Doubtful (RR 9) – a loan with an identified weakness that does not have a valid secondary source of repayment. Generally these credits have an impaired primary source of repayment and secondary sources are not sufficient to prevent a loss in the credit. The exact amount of the loss has not been determined at this time.
	·	Loss (RR 10) – a loan or a portion of a loan that is deemed to be uncollectible.

By definition, credit risk grades special mention (RR 7), substandard (RR 8), doubtful (RR 9) and loss (RR 10) are criticized loans while substandard (RR 8), doubtful (RR 9) and loss (RR 10) are classified loans. These definitions are standardized by all bank regulatory agencies and are generally equally applied to each individual lending institution. The remaining credit risk grades are considered pass credits and are solely defined by Trustmark.

Each commercial loan is assigned a credit risk grade that is an indication for the likelihood of default and is not a direct indication of loss at default. The loss at default aspect of the subject risk ratings is neither uniform across the nine primary commercial loan groups or constant between the geographic areas. To account for the variance in the loss at default aspects of the risk rate system, the loss expectations for each risk rating is integrated into the allowance for loan loss methodology where the calculated loss at default is allotted for each individual risk rating with respect to the individual loan group and unique geographic area. The loss at default aspect of the reserve methodology is calculated each quarter as a component of the overall reserve factor for each risk grade by loan group and geographic area.

To enhance this process, loans of a certain size that are rated in one of the criticized categories are routinely reviewed to establish an expectation of loss, if any, and if such examination indicates that the level of reserve is not adequate to cover the expectation of loss, a special reserve or impairment is generally applied.

The distribution of the losses is accomplished by means of a loss distribution model that assigns a loss factor to each risk rating (1 to 9) in each commercial loan pool. A factor is not applied to risk rate 10 as loans classified as Losses are not carried on Trustmark’s books over quarter-end as they are charged off within the period that the loss is determined.

The expected loss distribution is spread across the various risk ratings by the perceived level of risk for loss. The nine grade scale described above ranges from a negligible risk of loss to an identified loss across its breadth. The loss distribution factors are graduated through the scale on a basis proportional to the degree of risk that appears manifest in each individual rating and assumes that migration through the loan grading system will occur.

Each loan officer assesses the appropriateness of the internal risk rating assigned to their credits on an ongoing basis. Trustmark’s Asset Review area conducts independent credit quality reviews of the majority of Trustmark’s commercial loan portfolio concentrations both on the underlying credit quality of each individual loan portfolio as well as the adherence to Trustmark’s loan policy and the loan administration process. In general, Asset Review conducts reviews of each lending area within a six to eighteen month window depending on the overall credit quality results of the individual area.

In addition to the ongoing internal risk rate monitoring described above, Trustmark’s Credit Quality Review Committee meets monthly and performs a review of all loans of $100 thousand or more that are either delinquent thirty days or more or on nonaccrual. This review includes recommendations regarding risk ratings, accrual status, charge-offs and appropriate servicing officer as well as evaluation of problem credits for determination of TDRs. Quarterly, the Credit Quality Review Committee reviews and modifies continuous action plans for all credits risk rated seven or worse for relationships of $100 thousand or more. In addition, the Credit Quality Review Committee performs the following reviews on an annual basis:

	·	Residential real estate developments - a development project analysis is performed on all projects regardless of size. Performance of the development is assessed through an evaluation of the number of lots remaining, payout ratios, and loan-to-value ratios. Results are stress tested as to absorption and price of lots. This analysis is reviewed by each senior credit officer for the respective market to determine the need for any risk rate or accrual status changes.
	·	Non-owner occupied commercial real estate - a cash flow analysis is performed on all projects with an outstanding balance of $1.0 million or more. In addition, credits are stress tested for vacancies and rate sensitivity. Confirmation is obtained that guarantor financial statements are current, taxes have been paid and there are no other issues that need to be addressed. This analysis is reviewed by each senior credit officer in the respective market to determine the need for any risk rate or accrual status changes.

Consumer Credits

Consumer LHFI that do not meet a minimum custom credit score are reviewed quarterly by Management. The Retail Credit Review Committee reviews the volume and percentage of approvals that did not meet the minimum passing custom score by region, individual location, and officer. To assure that Trustmark continues to originate quality loans, this process allows Management to make necessary changes such as revisions to underwriting procedures and credit policies, or changes in loan authority to Trustmark personnel.

Trustmark monitors the levels and severity of past due consumer LHFI on a daily basis through its collection activities. A detailed assessment of consumer LHFI delinquencies is performed monthly at both a product and market level by delivery channel, which incorporates the perceived level of risk at time of underwriting. Trustmark also monitors its consumer LHFI delinquency trends by comparing them to quarterly industry averages.

The table below illustrates the carrying amount of LHFI by credit quality indicator at December 31, 2014 and 2013 ($ in thousands):

					31-Dec-14
					Commercial LHFI
					Pass –			Special Mention -			Substandard –			Doubtful –		Subtotal
					Categories 1-6			Category 7			Category 8			Category 9		Subtotal
Loans secured by real estate:
Construction, land development and other land					$	518,944		$	479		$	37,022		$	196	$	556,641
Secured by 1-4 family residential properties						125,203			1,652			7,483			213		134,551
Secured by nonfarm, nonresidential properties						1,462,226			8,431			81,661			-		1,552,318
Other						246,099			306			4,975			-		251,380
Commercial and industrial loans						1,239,247			4,245			26,133			719		1,270,344
Consumer loans						-			-			-			-		-
Other loans						928,251			7,550			6,779			564		943,144
					$	4,519,970		$	22,663		$	164,053		$	1,692	$	4,708,378

		Consumer LHFI
		Current			Past Due			Past Due			Nonaccrual			Subtotal		Total LHFI
		Current			30-89 Days			90 Days or More			Nonaccrual			Subtotal		Total LHFI
Loans secured by real estate:
Construction, land development and other land		$	62,897		$	199		$	59		$	81		$	63,236	$	619,877
Secured by 1-4 family residential properties			1,465,355			10,429			2,367			21,695			1,499,846		1,634,397
Secured by nonfarm, nonresidential properties			875			-			-			-			875		1,553,193
Other			2,407			-			-			-			2,407		253,787
Commercial and industrial loans			-			5			1			-			6		1,270,350
Consumer loans			165,504			2,162			211			87			167,964		167,964
Other loans			6,757			-			-			-			6,757		949,901
		$	1,703,795		$	12,795		$	2,638		$	21,863		$	1,741,091	$	6,449,469

					31-Dec-13
					Commercial LHFI
					Pass –			Special Mention -			Substandard –			Doubtful –		Subtotal
					Categories 1-6			Category 7			Category 8			Category 9		Subtotal
Loans secured by real estate:
Construction, land development and other land					$	493,380		$	4,383		$	47,610		$	318	$	545,691
Secured by 1-4 family residential properties						119,640			479			7,839			110		128,068
Secured by nonfarm, nonresidential properties						1,313,470			12,620			87,203			399		1,413,692
Other						178,951			-			6,756			235		185,942
Commercial and industrial loans						1,099,429			18,771			37,209			2,187		1,157,596
Consumer loans						496			-			-			-		496
Other loans						777,395			60			4,126			669		782,250
					$	3,982,761		$	36,313		$	190,743		$	3,918	$	4,213,735

		Consumer LHFI
		Current			Past Due			Past Due			Nonaccrual			Subtotal		Total LHFI
		Current			30-89 Days			90 Days or More			Nonaccrual			Subtotal		Total LHFI
Loans secured by real estate:
Construction, land development and other land		$	50,850		$	131		$	-		$	217		$	51,198	$	596,889
Secured by 1-4 family residential properties			1,327,624			8,937			2,996			17,939			1,357,496		1,485,564
Secured by nonfarm, nonresidential properties			1,439			8			-			-			1,447		1,415,139
Other			3,418			2			-			-			3,420		189,362
Commercial and industrial loans			13			5			-			-			18		1,157,614
Consumer loans			162,348			2,012			302			150			164,812		165,308
Other loans			6,755			-			-			-			6,755		789,005
		$	1,552,447		$	11,095		$	3,298		$	18,306		$	1,585,146	$	5,798,881


Past Due LHFI

LHFI past due 90 days or more totaled $2.8 million and $3.3 million at December 31, 2014 and 2013, respectively. The following table provides an aging analysis of past due and nonaccrual LHFI by class at December 31, 2014 and 2013 ($ in thousands):

		31-Dec-14
		Past Due
		30-59 Days			60-89 Days			90 Days			Total			Nonaccrual		Current		Total LHFI
		30-59 Days			60-89 Days			or More (1)			Total			Nonaccrual		Loans		Total LHFI
Loans secured by real estate:
Construction, land development and other land		$	248		$	17		$	60		$	325		$	13,867	$	605,685	$	619,877
Secured by 1-4 family residential properties			8,424			2,428			2,367			13,219			25,621		1,595,557		1,634,397
Secured by nonfarm, nonresidential properties			1,960			34			-			1,994			25,717		1,525,482		1,553,193
Other			80			-			-			80			1,318		252,389		253,787
Commercial and industrial loans			2,491			306			126			2,923			12,104		1,255,323		1,270,350
Consumer loans			1,811			351			211			2,373			88		165,503		167,964
Other loans			132			9			-			141			628		949,132		949,901
Total		$	15,146		$	3,145		$	2,764		$	21,055		$	79,343	$	6,349,071	$	6,449,469

(1) Past due 90 days or more but still accruing interest.

		31-Dec-13
		Past Due
		30-59 Days			60-89 Days			90 Days			Total			Nonaccrual		Current		Total LHFI
		30-59 Days			60-89 Days			or More (1)			Total			Nonaccrual		Loans		Total LHFI
Loans secured by real estate:
Construction, land development and other land		$	656		$	267		$	-		$	923		$	13,327	$	582,639	$	596,889
Secured by 1-4 family residential properties			7,322			2,115			2,996			12,433			21,603		1,451,528		1,485,564
Secured by nonfarm, nonresidential properties			1,934			110			-			2,044			21,809		1,391,286		1,415,139
Other			2			3			-			5			1,327		188,030		189,362
Commercial and industrial loans			809			198			-			1,007			6,286		1,150,321		1,157,614
Consumer loans			1,866			146			302			2,314			151		162,843		165,308
Other loans			17			-			-			17			735		788,253		789,005
Total		$	12,606		$	2,839		$	3,298		$	18,743		$	65,238	$	5,714,900	$	5,798,881

(1) Past due 90 days or more but still accruing interest.

Past Due LHFS

LHFS past due 90 days or more totaled $25.9 million and $21.5 million at December 31, 2014 and 2013, respectively. LHFS past due 90 days or more are serviced loans eligible for repurchase, which are fully guaranteed by the GNMA. GNMA optional repurchase programs allow financial institutions to buy back individual delinquent mortgage loans that meet certain criteria from the securitized loan pool for which the institution provides servicing. At the servicer's option and without GNMA's prior authorization, the servicer may repurchase such a delinquent loan for an amount equal to 100 percent of the remaining principal balance of the loan. This buy-back option is considered a conditional option until the delinquency criteria are met, at which time the option becomes unconditional. When Trustmark is deemed to have regained effective control over these loans under the unconditional buy-back option, the loans can no longer be reported as sold and must be brought back onto the balance sheet as loans held for sale, regardless of whether Trustmark intends to exercise the buy-back option. These loans are reported as held for sale with the offsetting liability being reported as short-term borrowings.

Trustmark did not exercise its buy-back option on any delinquent loans serviced for GNMA during 2014. During 2013, Trustmark exercised its option to repurchase approximately $57.4 million delinquent loans serviced for GNMA. These loans were subsequently sold to a third party under different repurchase provisions. Trustmark retained the servicing for these loans, which are fully guaranteed by FHA/VA. As a result of this repurchase and sale, the loans were no longer carried as LHFS. The transaction resulted in a gain of $534 thousand, which was included in mortgage banking, net for 2013.

Allowance for Loan Losses, LHFI

Trustmark’s allowance for loan loss methodology for commercial LHFI is based upon regulatory guidance from its primary regulator and GAAP. The methodology segregates the commercial purpose and commercial construction LHFI portfolios into nine separate loan types (or pools) which have similar characteristics such as repayment, collateral and risk profiles. The nine basic loan pools are further segregated into Trustmark’s five key market regions, Alabama, Florida, Mississippi, Tennessee and Texas, to take into consideration the uniqueness of each market. A 10-point risk rating system is utilized for each separate loan pool to apply a reserve factor consisting of quantitative and qualitative components to determine the needed allowance by each loan type. As a result, there are 450 risk rate factors for commercial loan types. The nine separate pools are shown below:

Commercial Purpose LHFI

	·	Real Estate – Owner-Occupied
	·	Real Estate – Non-Owner Occupied
	·	Working Capital
	·	Non-Working Capital
	·	Land
	·	Lots and Development
	·	Political Subdivisions

Commercial Construction LHFI

	·	1 to 4 Family
	·	Non-1 to 4 Family

The quantitative factors of the allowance methodology reflect a twelve-quarter rolling average of net charge-offs by loan type within each key market region. This allows for a greater sensitivity to current trends, such as economic changes, as well as current loss profiles and creates a more accurate depiction of historical losses.

Qualitative factors used in the allowance methodology include the following:

	·	National and regional economic trends and conditions
	·	Impact of recent performance trends
	·	Experience, ability and effectiveness of management
	·	Adherence to Trustmark’s loan policies, procedures and internal controls
	·	Collateral, financial and underwriting exception trends
	·	Credit concentrations
	·	Acquisitions
	·	Catastrophe

Each qualitative factor is converted to a scale ranging from 0 (No risk) to 100 (High Risk), other than the last two factors, which are applied on a dollar-for-dollar basis to ensure that the combination of such factors is proportional. The resulting ratings from the individual factors are weighted and summed to establish the weighted-average qualitative factor of a specific loan portfolio within each key market region. This weighted-average qualitative factor is then distributed over the nine primary loan pools within each key market region based on the ranking by risk of each.

During 2014, Trustmark revised the qualitative portion of the allowance for loan loss methodology for commercial LHFI to incorporate an additional reserve component for commercial nonaccrual loans under $500 thousand. A LHFI is considered impaired when, based on current information and events, it is probable that Trustmark will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. A formal impairment analysis is performed on all commercial nonaccrual LHFI with an outstanding balance of $500 thousand or more, and based upon this analysis LHFI are written down to net realizable value. The implementation of this commercial qualitative factor will allow Trustmark to address additional credit risk and loss potential due to inadequate source of repayment and collateral for commercial nonaccrual LHFI below the $500 thousand threshold for a formal analysis. For such loans, it is currently unlikely that full repayment of both principal and interest will be realized. An additional provision of approximately $822 thousand was recorded in 2014 as result of this revision to the qualitative portion of the allowance for loan loss methodology for commercial LHFI.

During 2013, Trustmark revised the qualitative portion of the allowance for loan loss methodology for commercial LHFI to incorporate a loan facility risk component. Loan facility risk embodies the nature, frequency and duration of the repayment structure as it pertains to the actual source of loan repayment. The underlying loan structure and nature of the credit either is risk neutral for standard structure or adds risk to the credit for any variance that represents additional credit risk from the standard structure. If the facility structure adds additional credit risk, qualitative reserves are added to individual loans based on their respective commercial loan pools. Factors considered in assigning facility risk include whether the principal is amortizing or not amortizing, revolving or not revolving, the payment frequency and the duration of the payment structure. An additional provision of approximately $1.6 million was recorded in 2013 as a result of this revision to the qualitative portion of the allowance for loan loss methodology for commercial LHFI.

For each commercial loan portfolio, the loan facility risk factor’s percentage of the balances are summed and weighted based on commercial loan portfolio rankings. This weighted-average facility factor is then distributed over the nine primary loan pools within each key market region based on the ranking by risk of each.

During 2012, Trustmark revised the quantitative portion of the allowance for loan loss methodology for consumer and residential LHFI. Trustmark converted the historical loss factor from a 20-quarter net charge-off rolling average to a 12-quarter rolling average and developed a separate reserve for junior liens on 1-4 family LHFI. The change in quantitative methodology allowed Trustmark to more readily correlate portfolio risk to the current market environment as the impact of more recent experience is emphasized. This change also allowed for a greater sensitivity to current trends such as economic and performance changes, which included current loss profiles, and created a more accurate depiction of historical losses. Loans and lines of credit secured by junior liens on 1-4 family residential properties were being reserved for separately in light of continued uncertainty in the economy and the housing market in particular. An additional provision of approximately $1.4 million was recorded in 2012 as a result of this revision to the quantitative portion of the allowance for loan loss methodology for consumer and residential LHFI.

The allowance for loan loss methodology segregates the consumer LHFI portfolio into homogeneous pools of loans that contain similar structure, repayment, collateral and risk profiles. These homogeneous pools of loans are shown below:

	·	Residential Mortgage
	·	Direct Consumer
	·	Auto Finance
	·	Junior Lien on 1-4 Family Residential Properties
	·	Credit Cards
	·	Overdrafts

The historical loss experience for these pools is determined by calculating a 12-quarter rolling average of net charge-offs, which is applied to each pool to establish the quantitative aspect of the methodology. Where, in Management’s estimation, the calculated loss experience does not fully cover the anticipated loss for a pool, an estimate is also applied to each pool to establish the qualitative aspect of the methodology, which represents the perceived risks across the loan portfolio at the current point in time. This qualitative methodology utilizes five separate factors made up of unique components that when weighted and combined produce an estimated level of reserve for each of the loan pools. The five qualitative factors include the following:

	·	Economic indicators
	·	Performance trends
	·	Management experience
	·	Lending policy measures
	·	Credit concentrations

The risk measure for each factor is converted to a scale ranging from 0 (No risk) to 100 (High Risk) to ensure that the combination of such factors is proportional. The determination of the risk measurement for each qualitative factor is done for all markets combined. The resulting estimated reserve factor is then applied to each pool.

During 2014, Trustmark revised the qualitative portion of the allowance for loan loss methodology for consumer LHFI to incorporate the use of consumer credit bureau scores developed and provided by an independent third party. The credit bureau scores reflect the customer’s historical willingness and ability to service their debt. These credit bureau scores are monitored on an ongoing basis and represent a consumer’s credit payment history with all of their creditors including their repayment performance with Trustmark. The implementation of this consumer qualitative factor will allow Trustmark to better monitor shifts in risk that are represented in the retail portfolio and ensure that it is reflective in the allowance for loan loss calculation. An additional provision of approximately $1.4 million was recorded in 2014 as a result of this revision to the qualitative portion of the allowance for loan loss methodology for consumer LHFI.

The resulting ratings from the individual factors are weighted and summed to establish the weighted-average qualitative factor of a specific loan portfolio. This weighted-average qualitative factor is then applied over the six loan pools.

Changes in the allowance for loan losses, LHFI were as follows for the periods presented ($ in thousands):

		Years Ended December31,
		2014			2013			2012
Balance at beginning of period		$	66,448		$	78,738		$	89,518
Loans charged-off			(13,226	)		(13,478	)		(31,376	)
Recoveries			15,183			14,609			13,830
Net recoveries (charge-offs)			1,957			1,131			(17,546	)
Provision for loan losses, LHFI			1,211			(13,421	)		6,766
Balance at end of period		$	69,616		$	66,448		$	78,738

The following tables detail the balance in the allowance for loan losses, LHFI by portfolio segment at December 31, 2014 and 2013, respectively ($ in thousands):

		2014
		Balance									Provision for			Balance
		January 1,			Charge-offs			Recoveries			Loan Losses			December 31,
Loans secured by real estate:
Construction, land development and other land		$	13,165		$	(1,100	)	$	3,608		$	(2,600	)	$	13,073
Secured by 1-4 family residential properties			9,633			(2,505	)		922			1,627			9,677
Secured by nonfarm, nonresidential properties			19,672			(390	)		944			(1,703	)		18,523
Other			2,080			(277	)		-			338			2,141
Commercial and industrial loans			15,522			(2,092	)		2,657			3,830			19,917
Consumer loans			2,405			(1,965	)		3,883			(2,174	)		2,149
Other loans			3,971			(4,897	)		3,169			1,893			4,136
Total allowance for loan losses, LHFI		$	66,448		$	(13,226	)	$	15,183		$	1,211		$	69,616

		Disaggregated by Impairment Method
		Individually			Collectively			Total
Loans secured by real estate:
Construction, land development and other land		$	2,767		$	10,306		$	13,073
Secured by 1-4 family residential properties			450			9,227			9,677
Secured by nonfarm, nonresidential properties			2,787			15,736			18,523
Other			52			2,089			2,141
Commercial and industrial loans			6,449			13,468			19,917
Consumer loans			-			2,149			2,149
Other loans			259			3,877			4,136
Total allowance for loan losses, LHFI		$	12,764		$	56,852		$	69,616
		2013
		Balance									Provision for			Balance
		January 1,			Charge-offs			Recoveries			Loan Losses			December 31,
Loans secured by real estate:
Construction, land development and other land		$	21,838		$	(1,441	)	$	3,077		$	(10,309	)	$	13,165
Secured by 1-4 family residential properties			12,957			(1,298	)		427			(2,453	)		9,633
Secured by nonfarm, nonresidential properties			21,096			(1,002	)		225			(647	)		19,672
Other			2,197			(910	)		229			564			2,080
Commercial and industrial loans			14,319			(1,371	)		2,298			276			15,522
Consumer loans			3,087			(2,425	)		4,798			(3,055	)		2,405
Other loans			3,244			(5,031	)		3,555			2,203			3,971
Total allowance for loan losses, LHFI		$	78,738		$	(13,478	)	$	14,609		$	(13,421	)	$	66,448

		Disaggregated by Impairment Method
		Individually			Collectively			Total
Loans secured by real estate:
Construction, land development and other land		$	988		$	12,177		$	13,165
Secured by 1-4 family residential properties			191			9,442			9,633
Secured by nonfarm, nonresidential properties			2,307			17,365			19,672
Other			123			1,957			2,080
Commercial and industrial loans			1,253			14,269			15,522
Consumer loans			2			2,403			2,405
Other loans			317			3,654			3,971
Total allowance for loan losses, LHFI		$	5,181		$	61,267		$	66,448

Acquired_Loans

Acquired Loans	12 Months Ended
Acquired Loans	Dec. 31, 2014
Acquired Loans [Abstract]
Acquired Loans	Note 6 – Acquired Loans

	At December 31, 2014 and 2013, acquired loans consisted of the following ($ in thousands):

			31-Dec-14								31-Dec-13
			Noncovered				Covered				Noncovered				Covered
	Loans secured by real estate:
	Construction, land development and other land		$	58,309			$	1,197			$	98,928			$	2,363
	Secured by 1-4 family residential properties			116,920				13,180				157,914				16,416
	Secured by nonfarm, nonresidential properties			202,323				7,672				287,136				10,945
	Other			27,813				1,096				33,948				2,644
	Commercial and industrial loans			88,256				277				149,495				394
	Consumer loans			9,772				-				18,428				119
	Other loans			22,390				204				24,141				1,335
	Acquired loans			525,783				23,626				769,990				34,216
	Less allowance for loan losses, acquired loans			10,541				1,518				7,249				2,387
	Net acquired loans		$	515,242			$	22,108			$	762,741			$	31,829

	On February 15, 2013, Trustmark completed its merger with BancTrust. Loans acquired in the BancTrust merger were evaluated for evidence of credit deterioration since origination and collectability of contractually required payments. Trustmark elected to account for all loans acquired in the BancTrust merger as acquired impaired loans under FASB ASC Topic 310-30 except for $153.9 million of acquired loans with revolving privileges and acquired commercial leases, which are outside the scope of the guidance. While not all loans acquired from BancTrust exhibited evidence of significant credit deterioration, accounting for these acquired loans under FASB ASC Topic 310-30 would have materially the same result as the alternative accounting treatment. During the second and third quarters of 2013, Trustmark recorded fair value adjustments based on the estimated fair value of certain acquired loans which resulted in a net decrease in acquired noncovered loans totaling $6.8 million. The purchase price allocation for these loans was considered final as of December 31, 2013.

	The following table presents the adjusted fair value of loans acquired as of the date of the BancTrust merger ($ in thousands):

	At acquisition date:		15-Feb-13
	Contractually required principal and interest		$	1,256,669
	Nonaccretable difference			201,324
	Cash flows expected to be collected			1,055,345
	Accretable yield			98,394
	FASB ASC Topic 310-20 discount			12,716
	Fair value of loans at acquisition		$	944,235

	The following table presents changes in the net carrying value of the acquired loans for the periods presented ($ in thousands):

			Noncovered								Covered
			Acquired				Acquired				Acquired				Acquired
			Impaired				Not ASC 310-30 (1)				Impaired				Not ASC 310-30 (1)
	Carrying value, net at January 1, 2013		$	72,942			$	6,696			$	45,391			$	2,460
	Loans acquired (2)			790,335				153,900				-				-
	Accretion to interest income			35,538				2,628				5,150				159
	Payments received, net			(229,618	)			(39,281	)			(18,976	)			(819	)
	Other (3)			(24,177	)			(858	)			(3,202	)			(137	)
	Less change in allowance for loan losses, acquired loans			(5,364	)			-				1,803				-
	Carrying value, net at December 31, 2013			639,656				123,085				30,166				1,663
	Accretion to interest income			44,575				1,706				4,052				1
	Payments received, net			(216,378	)			(42,284	)			(12,396	)			(30	)
	Other (3)			(29,724	)			(2,102	)			(1,733	)			(484	)
	Less change in allowance for loan losses, acquired loans			(3,978	)			686				415				454
	Carrying value, net at December 31, 2014		$	434,151			$	81,091			$	20,504			$	1,604

	(1) "Acquired Not ASC 310-30" loans consist of revolving credit agreements and commercial leases that are not in scope for FASB ASC Topic 310-30.
	(2) Adjusted fair value of loans acquired from BancTrust on February 15, 2013.
	(3) Includes acquired loan terminations through foreclosure, charge-off, pool recovery and other terminations.

	Under FASB ASC Topic 310-30, the accretable yield is the excess of expected cash flows at acquisition over the initial fair value of acquired impaired loans and is recorded as interest income over the estimated life of the loans using the effective yield method if the timing and amount of the future cash flows is reasonably estimable. The following table presents changes in the accretable yield for the years ended December 31, 2014 and 2013 ($ in thousands):

			Years Ended December 31,
			2014				2013
	Accretable yield at beginning of period		$	(109,006	)		$	(26,383	)
	Additions due to acquisition (1)			-				(98,394	)
	Accretion to interest income			48,627				40,688
	Disposals			16,383				18,438
	Reclassification to / (from) nonaccretable difference (2)			(33,153	)			(43,355	)
	Accretable yield at end of period		$	(77,149	)		$	(109,006	)

	(1) Accretable yield on loans acquired from BancTrust on February 15, 2013, including measurement period adjustments.
(2) Reclassifications from nonaccretable difference are due to lower loss expectations and improvements in expected cashflows.

The following tables present the components of the allowance for loan losses on acquired impaired loans for the years ended December 31, 2014, 2013 and 2012 ($ in thousands):

		Noncovered				Covered				Total
Balance at January 1, 2014		$	7,249			$	2,387			$	9,636
Provision for loan losses, acquired loans			7,149				(978	)			6,171
Loans charged-off			(6,274	)			127				(6,147	)
Recoveries			2,417				(18	)			2,399
Net (charge-offs) recoveries			(3,857	)			109				(3,748	)
Balance at December 31, 2014		$	10,541			$	1,518			$	12,059

		Noncovered				Covered				Total
Balance at January 1, 2013		$	1,885			$	4,190			$	6,075
Provision for loan losses, acquired loans			7,367				(1,328	)			6,039
Loans charged-off			(3,634	)			(460	)			(4,094	)
Recoveries			1,631				(15	)			1,616
Net charge-offs			(2,003	)			(475	)			(2,478	)
Balance at December 31, 2013		$	7,249			$	2,387			$	9,636

		Noncovered				Covered				Total
Balance at January 1, 2012		$	-			$	502			$	502
Provision for loan losses, acquired loans			1,916				3,612				5,528
Loans charged-off			(290	)			(81	)			(371	)
Recoveries			259				157				416
Net (charge-offs) recoveries			(31	)			76				45
Balance at December 31, 2012		$	1,885			$	4,190			$	6,075

As discussed in Note 5 - LHFI and Allowance for Loan Losses, LHFI, Trustmark has established a loan grading system that consists of ten individual credit risk grades (risk ratings) that encompass a range from loans where the expectation of loss is negligible to loans where loss has been established. The model is based on the risk of default for an individual credit and establishes certain criteria to segregate the level of risk across the ten unique risk ratings. These credit quality measures are unique to commercial loans. Credit quality for consumer loans is based on individual credit scores, aging status of the loan and payment activity.

The tables below illustrate the carrying amount of acquired loans by credit quality indicator at December 31, 2014 and 2013 ($ in thousands):

		31-Dec-14
						Commercial Loans
						Pass -				Special Mention -				Substandard -				Doubtful -
						Categories 1-6				Category 7				Category 8				Category 9		Subtotal
Noncovered Loans:
Loans secured by real estate:
Construction, land development and other land						$	20,224			$	280			$	28,339			$	5,821	$	54,664
Secured by 1-4 family residential properties							30,796				760				8,466				388		40,410
Secured by nonfarm, nonresidential properties							157,753				3,452				39,408				1,710		202,323
Other							22,754				92				4,864				95		27,805
Commercial and industrial loans							64,720				17				19,706				3,813		88,256
Consumer loans							-				-				-				-		-
Other loans							19,706				45				2,617				-		22,368
Total noncovered loans							315,953				4,646				103,400				11,827		435,826

Covered Loans: (1)
Loans secured by real estate:
Construction, land development and other land							-				-				955				102		1,057
Secured by 1-4 family residential properties							194				235				1,045				-		1,474
Secured by nonfarm, nonresidential properties							4,419				88				2,879				-		7,386
Other							-				108				426				2		536
Commercial and industrial loans							145				24				108				-		277
Consumer loans							-				-				-				-		-
Other loans							204				-				-				-		204
Total covered loans							4,962				455				5,413				104		10,934
Total acquired loans						$	320,915			$	5,101			$	108,813			$	11,931	$	446,760

		Consumer Loans
						Past Due				Past Due										Total
		Current				30-89 Days				90 Days or More				Nonaccrual				Subtotal		Acquired Loans
Noncovered Loans:
Loans secured by real estate:
Construction, land development and other land			3,338				25				282			$	-			$	3,645	$	58,309
Secured by 1-4 family residential properties			71,316				2,335				2,742				117				76,510		116,920
Secured by nonfarm, nonresidential properties			-				-				-				-				-		202,323
Other			8				-				-				-				8		27,813
Commercial and industrial loans			-				-				-				-				-		88,256
Consumer loans			9,634				114				24				-				9,772		9,772
Other loans			22				-				-				-				22		22,390
Total noncovered loans			84,318				2,474				3,048				117				89,957		525,783

Covered Loans: (1)
Loans secured by real estate:
Construction, land development and other land			140				-				-				-				140		1,197
Secured by 1-4 family residential properties			10,925				473				308				-				11,706		13,180
Secured by nonfarm, nonresidential properties			286				-				-				-				286		7,672
Other			525				-				35				-				560		1,096
Commercial and industrial loans			-				-				-				-				-		277
Consumer loans			-				-				-				-				-		-
Other loans			-				-				-				-				-		204
Total covered loans			11,876				473				343				-				12,692		23,626
Total acquired loans		$	96,194			$	2,947			$	3,391			$	117			$	102,649	$	549,409

(1) Total dollar balances are presented in this table; however, these loans are covered by the loss-share agreement with the FDIC.
TNB is at risk for only 20% of the losses incurred on these loans.

		31-Dec-13
						Commercial Loans
						Pass -				Special Mention -				Substandard -				Doubtful -
						Categories 1-6				Category 7				Category 8				Category 9		Subtotal
Noncovered Loans:
Loans secured by real estate:
Construction, land development and other land						$	39,075			$	2,506			$	42,486			$	8,445	$	92,512
Secured by 1-4 family residential properties							33,810				2,983				17,422				538		54,753
Secured by nonfarm, nonresidential properties							184,594				9,027				88,952				4,563		287,136
Other							28,156				1,437				4,071				184		33,848
Commercial and industrial loans							116,818				2,248				24,084				6,039		149,189
Consumer loans							21				-				-				-		21
Other loans							21,881				-				882				1,306		24,069
Total noncovered loans							424,355				18,201				177,897				21,075		641,528

Covered Loans: (1)
Loans secured by real estate:
Construction, land development and other land							228				-				1,126				771		2,125
Secured by 1-4 family residential properties							1,629				430				1,798				-		3,857
Secured by nonfarm, nonresidential properties							5,446				109				4,723				-		10,278
Other							832				134				717				2		1,685
Commercial and industrial loans							254				28				112				-		394
Consumer loans							-				-				-				-		-
Other loans							271				-				414				646		1,331
Total covered loans							8,660				701				8,890				1,419		19,670
Total acquired loans						$	433,015			$	18,902			$	186,787			$	22,494	$	661,198

		Consumer Loans
						Past Due				Past Due										Total
		Current				30-89 Days				90 Days or More				Nonaccrual				Subtotal		Acquired Loans
Noncovered Loans:
Loans secured by real estate:
Construction, land development and other land		$	5,813			$	108			$	495			$	-			$	6,416	$	98,928
Secured by 1-4 family residential properties			95,987				3,599				3,466				109				103,161		157,914
Secured by nonfarm, nonresidential properties			-				-				-				-				-		287,136
Other			100				-				-				-				100		33,948
Commercial and industrial loans			306				-				-				-				306		149,495
Consumer loans			18,076				239				92				-				18,407		18,428
Other loans			72				-				-				-				72		24,141
Total noncovered loans			120,354				3,946				4,053				109				128,462		769,990

Covered Loans: (1)
Loans secured by real estate:
Construction, land development and other land			133				77				28				-				238		2,363
Secured by 1-4 family residential properties			11,179				428				952				-				12,559		16,416
Secured by nonfarm, nonresidential properties			495				-				172				-				667		10,945
Other			617				342				-				-				959		2,644
Commercial and industrial loans			-				-				-				-				-		394
Consumer loans			119				-				-				-				119		119
Other loans			4				-				-				-				4		1,335
Total covered loans			12,547				847				1,152				-				14,546		34,216
Total acquired loans		$	132,901			$	4,793			$	5,205			$	109			$	143,008	$	804,206

-1	Total dollar balances are presented in this table; however, these loans are covered by the loss-share agreement with the FDIC. TNB is at risk for only 20% of the losses incurred on these loans.

At December 31, 2014 and 2013, there were no acquired impaired loans accounted for under FASB ASC Topic 310-30 classified as nonaccrual loans. At December 31, 2014, approximately $1.1 million of acquired loans not accounted for under FASB ASC Topic 310-30 were classified as nonaccrual loans, compared to approximately $2.4 million of acquired loans at December 31, 2013.

The following tables provide an aging analysis of contractually past due and nonaccrual acquired loans, by class at December 31, 2014 and 2013 ($ in thousands):

		31-Dec-14
		Past Due
		30-59 Days				60-89 Days				90 Days				Total				Nonaccrual (2)		Current		Total Acquired
		30-59 Days				60-89 Days				or More (1)				Total				Nonaccrual (2)		Loans		Loans
Noncovered loans:
Loans secured by real estate:
Construction, land development and other land		$	246			$	7			$	21,985			$	22,238			$	194	$	35,877	$	58,309
Secured by 1-4 family residential properties			2,576				981				5,162				8,719				422		107,779		116,920
Secured by nonfarm, nonresidential properties			89				865				13,275				14,229				-		188,094		202,323
Other			-				-				604				604				-		27,209		27,813
Commercial and industrial loans			334				128				1,099				1,561				461		86,234		88,256
Consumer loans			86				29				24				139				-		9,633		9,772
Other loans			-				-				-				-				-		22,390		22,390
Total noncovered loans			3,331				2,010				42,149				47,490				1,077		477,216		525,783

Covered loans:
Loans secured by real estate:
Construction, land development and other land			-				-				376				376				-		821		1,197
Secured by 1-4 family residential properties			253				296				477				1,026				-		12,154		13,180
Secured by nonfarm, nonresidential properties			239				488				-				727				-		6,945		7,672
Other			-				-				368				368				-		728		1,096
Commercial and industrial loans			-				-				42				42				67		168		277
Consumer loans			-				-				-				-				-		-		-
Other loans			-				-				-				-				-		204		204
Total covered loans			492				784				1,263				2,539				67		21,020		23,626
Total acquired loans		$	3,823			$	2,794			$	43,412			$	50,029			$	1,144	$	498,236	$	549,409

(1) Past due 90 days or more but still accruing interest.
(2) Acquired loans not accounted for under FASB ASC Topic 310-30.

		31-Dec-13
		Past Due
		30-59 Days				60-89 Days				90 Days				Total				Nonaccrual (2)		Current		Total Acquired
		30-59 Days				60-89 Days				or More (1)				Total				Nonaccrual (2)		Loans		Loans
Noncovered loans:
Loans secured by real estate:
Construction, land development and other land		$	1,648			$	468			$	31,744			$	33,860			$	67	$	65,001	$	98,928
Secured by 1-4 family residential properties			3,901				1,166				7,589				12,656				116		145,142		157,914
Secured by nonfarm, nonresidential properties			4,851				3,127				15,421				23,399				461		263,276		287,136
Other			40				-				1,922				1,962				33		31,953		33,948
Commercial and industrial loans			526				217				3,387				4,130				1,170		144,195		149,495
Consumer loans			205				34				92				331				-		18,097		18,428
Other loans			-				-				153				153				20		23,968		24,141
Total noncovered loans			11,171				5,012				60,308				76,491				1,867		691,632		769,990

Covered loans:
Loans secured by real estate:
Construction, land development and other land			87				-				553				640				445		1,278		2,363
Secured by 1-4 family residential properties			515				358				1,142				2,015				-		14,401		16,416
Secured by nonfarm, nonresidential properties			243				1,662				793				2,698				-		8,247		10,945
Other			571				139				2				712				-		1,932		2,644
Commercial and industrial loans			13				-				-				13				41		340		394
Consumer loans			-				-				-				-				-		119		119
Other loans			-				-				646				646				-		689		1,335
Total covered loans			1,429				2,159				3,136				6,724				486		27,006		34,216
Total acquired loans		$	12,600			$	7,171			$	63,444			$	83,215			$	2,353	$	718,638	$	804,206

(1) Past due 90 days or more but still accruing interest.
(2) Acquired loans not accounted for under FASB ASC Topic 310-30.

Premises_and_Equipment_Net

Premises and Equipment, Net	12 Months Ended
Premises and Equipment, Net	Dec. 31, 2014
Premises and Equipment, Net [Abstract]
Premises and Equipment, Net	Note 7 – Premises and Equipment, Net

	At December 31, 2014 and 2013, premises and equipment are summarized as follows ($ in thousands):

		2014		2013
	Land	$	57,794	$	58,132
	Buildings and leasehold improvements		198,739		199,976
	Furniture and equipment		162,321		154,633
	Total cost of premises and equipment		418,854		412,741
	Less accumulated depreciation and amortization		218,073		205,458
	Premises and equipment, net	$	200,781	$	207,283

	Depreciation and amortization of premises and equipment totaled $14.1 million in 2014, $14.3 million in 2013 and $12.0 million in 2012.

Mortgage_Banking

Mortgage Banking	12 Months Ended
Mortgage Banking	Dec. 31, 2014
Mortgage Banking [Abstract]
Mortgage Banking	Note 8 – Mortgage Banking

	Mortgage Servicing Rights

	The activity in MSR is detailed in the table below for the periods presented ($ in thousands):

		Years Ended December 31,
		2014			2013
	Balance at beginning of period	$	67,834		$	47,341
	Origination of servicing assets		12,293			18,481
	Change in fair value:
	Due to market changes		(7,202	)		11,818
	Due to runoff		(8,567	)		(9,806	)
	Balance at end of period	$	64,358		$	67,834

	In the determination of the fair value of MSR at the date of securitization, certain key economic assumptions are made. For instance, Trustmark considers the conditional prepayment rate (CPR), which is an estimated loan prepayment rate that uses historical prepayment rates for previous loans similar to the loans being evaluated, and the discount rate in determining the fair value of MSR. An increase in either the CPR or discount rate assumption will result in a decrease in the fair value of the MSR, while a decrease in either assumption will result in an increase in the fair value of the MSR. At December 31, 2014, the fair value of MSR included an assumed average prepayment speed of 11.51 CPR and an average discount rate of 10.29% compared to an assumed average prepayment speed of 9.72 CPR and an average discount rate of 10.52% at December 31, 2013. In recent years, there have been significant market-driven fluctuations in loan prepayment speeds and discount rates. These fluctuations can be rapid and may continue to be significant. Therefore, estimating prepayment speed and/or discount rates within ranges that market participants would use in determining the fair value of MSR requires significant management judgment.

	Mortgage Loans Sold/Serviced

	During 2014, 2013 and 2012, Trustmark sold $913.5 million, $1.358 billion and $1.816 billion, respectively, of residential mortgage loans. Pretax gains on these sales were recorded to noninterest income in mortgage banking, net and totaled $10.8 million in 2014, $26.4 million in 2013 and $33.9 million in 2012. Trustmark receives annual servicing fee income approximating 0.34% of the outstanding balance of the underlying loans. Trustmark's mortgage loans serviced for others totaled $5.636 billion at December 31, 2014, compared with $5.461 billion at December 31, 2013. The investors and the securitization trusts have no recourse to the assets of Trustmark for failure of debtors to pay when due. The table below details the mortgage loans sold and serviced for others at December 31, 2014 and 2013 ($ in thousands):

		31-Dec-14			31-Dec-13
	Federal National Mortgage Association	$	3,579,987		$	3,499,659
	Government National Mortgage Association		1,948,565			1,830,420
	Federal Home Loan Mortgage Corporation		80,551			92,599
	Other		27,146			37,998
	Total mortage loans sold and serviced for others	$	5,636,249		$	5,460,676

	Trustmark is subject to losses in its loan servicing portfolio due to loan foreclosures. Trustmark has obligations to either repurchase the outstanding principal balance of a loan or make the purchaser whole for the economic benefits of a loan if it is determined that the loan sold was in violation of representations or warranties made by Trustmark at the time of the sale, herein referred to as mortgage loan servicing putback expenses. Such representations and warranties typically include those made regarding loans that had missing or insufficient file documentation, loans that do not meet investor guidelines, loans in which the appraisal does not support the value and/or loans obtained through fraud by the borrowers or other third parties. Generally, putback requests may be made until the loan is paid in full. However, mortgage loans delivered to Federal National Mortgage Association (FNMA) and Federal Home Loan Mortgage Corporation (FHLMC) on or after January 1, 2013 are subject to the Lending and Selling Representations and Warranties Framework updated in May 2014, which provides certain instances in which FNMA and FHLMC will not exercise their remedies, including a putback request, for breaches of certain selling representations and warranties, such as payment history and quality control review.

	When a putback request is received, Trustmark evaluates the request and takes appropriate actions based on the nature of the request. Effective January 1, 2013, Trustmark was required by FNMA and FHLMC to provide a response to putback requests within 60 days of the date of receipt. Currently, putback requests primarily relate to 2009 through 2013 vintage mortgage loans. The total mortgage loan servicing putback expenses, included in other noninterest expense, incurred by Trustmark during 2014, 2013 and 2012 were $600 thousand, $1.6 million and $8.0 million, respectively.

	Changes in the reserve for mortgage loan servicing putback expense were as follows for the periods presented ($ in thousands):

		Years Ended December 31,
		2014			2013			2012
	Balance at beginning of period	$	1,050		$	7,800		$	4,277
	Provision for putback expenses		600			1,561			8,015
	Losses		(480	)		(4,756	)		(4,492	)
	FNMA resolution		-			(3,555	)		-
	Balance at end of period	$	1,170		$	1,050		$	7,800

	During November 2013, Trustmark finalized its agreement with FNMA (the "Resolution Agreement") to resolve its existing and future repurchase and make whole obligations (collectively “Repurchase Obligations”) related to mortgage loans originated between January 1, 2000 and December 31, 2008 and delivered to FNMA. Under the terms of the Resolution Agreement, Trustmark paid FNMA approximately $3.6 million with respect to the Repurchase Obligations. Trustmark believes that it was in its best interests to execute the Resolution Agreement in order to bring finality to the loss reimbursement exposure with FNMA for these years and reduce the resources spent on individual file reviews and defending loss reimbursement requests. The Repurchase Obligations were covered by Trustmark’s existing reserve for mortgage loan servicing putback expenses.

	Mortgage loans covered by the Resolution Agreement executed with FNMA are only subject to putback risk due to borrower fraud or systemic risk. Trustmark’s exposure to putback requests for loans sold to FNMA, which were originated after 2008, has improved as a result of industry-wide guidelines and process enhancements implemented since that time. Trustmark’s exposure to putback requests for loans sold to GNMA has improved as a result of declining delinquency ratios. Please refer to the “Past Due LHFS” section included in Note 5 – LHFI and Allowance for Loan Losses, LHFI for additional information regarding mortgage loans sold to GNMA.

	There is inherent uncertainty in reasonably estimating the requirement for reserves against future mortgage loan servicing putback expenses. Future putback expenses are dependent on many subjective factors, including the review procedures of the purchasers and the potential refinance activity on loans sold with servicing released and the subsequent consequences under the representations and warranties. Trustmark believes that it has appropriately reserved for potential mortgage loan servicing putback requests.

Goodwill_and_Identifiable_Inta

Goodwill and Identifiable Intangible Assets	12 Months Ended
Goodwill and Identifiable Intangible Assets	Dec. 31, 2014
Goodwill and Identifiable Intangible Assets [Abstract]
Goodwill and Identifiable Intangible Assets	Note 9 – Goodwill and Identifiable Intangible Assets

	Goodwill

	The table below illustrates goodwill by segment for the years ended December 31, 2014 and 2013 ($ in thousands):

		General
		Banking			Insurance		Total
	Balance as of January 1, 2013	$	246,736		$	44,368	$	291,104
	Goodwill from acquisitions during 2013		81,747			-		81,747
	Balance as of December 31, 2013		328,483			44,368		372,851
	Measurement period adjustment during 2014		(7,351	)		-		(7,351	)
	Balance as of December 31, 2014	$	321,132		$	44,368	$	365,500

	Trustmark's General Banking segment delivers a full range of banking services to consumer, corporate, small and middle-market businesses through its extensive branch network. During 2013, Trustmark recorded as goodwill $81.6 million from its merger with BancTrust and $150 thousand from its acquisition of two SOUTHBank branches. During 2014, Trustmark recorded a measurement period adjustment that decreased goodwill $7.4 million as a result of fair value adjustments to BancTrust’s assets and liabilities.

	The Insurance segment includes TNB’s wholly-owned retail insurance subsidiary that offers a diverse mix of insurance products and services. Trustmark performed an impairment test of goodwill of reporting units in both the General Banking and Insurance segments during 2014, 2013 and 2012, which indicated that no impairment charge was required. Based on this analysis, Trustmark concluded that no impairment charge was required.

	Identifiable Intangible Assets

	At December 31, 2014 and 2013, identifiable intangible assets consisted of the following ($ in thousands):

		2014								2013
		Gross Carrying			Accumulated		Net Carrying			Gross Carrying		Accumulated		Net Carrying
		Amount			Amortization		Amount			Amount		Amortization		Amount
	Core deposit intangibles	$	85,824		$	54,464	$	31,360		$	85,824	$	46,437	$	39,387
	Insurance intangibles		11,693			10,566		1,127			11,693		9,967		1,726
	Banking charters		1,325			745		580			1,325		678		647
	Borrower relationship intangible		690			523		167			690		460		230
	Total	$	99,532		$	66,298	$	33,234		$	99,532	$	57,542	$	41,990

	In both 2014 and 2013, Trustmark recorded $8.8 million of amortization of identifiable intangible assets and recorded $3.8 million in 2012. Trustmark estimates that amortization expense for identifiable intangible assets will be $7.6 million in 2015, $6.7 million in 2016, $5.7 million in 2017, $4.8 million in 2018 and $3.6 million in 2019. Fully amortized intangibles are excluded from the table above. Trustmark continually evaluates whether events and circumstances have occurred that indicate that identifiable intangible assets have become impaired. Measurement of any impairment of such identifiable intangible assets is based on the fair values of those assets. There were no impairment losses on identifiable intangible assets recorded during 2014, 2013 or 2012.

	The following table illustrates the carrying amounts and remaining weighted-average amortization periods of identifiable intangible assets as of December 31, 2014 ($ in thousands):

					Remaining
					Weighted-
					Average
		Net Carrying			Amortization
		Amount			Period in Years
	Core deposit intangibles	$	31,360			7.5
	Insurance intangibles		1,127			4.9
	Banking charters		580			8.7
	Borrower relationship intangible		167			2.7
	Total	$	33,234			7.4

Other_Real_Estate_and_Covered_

Other Real Estate and Covered Other Real Estate	12 Months Ended
Other Real Estate and Covered Other Real Estate	Dec. 31, 2014
Other Real Estate and Covered Other Real Estate [Abstract]
Other Real Estate and Covered Other Real Estate	Note 10 – Other Real Estate and Covered Other Real Estate

	Other Real Estate, excluding Covered Other Real Estate

	At December 31, 2014, Trustmark's geographic other real estate distribution was concentrated primarily in its five key market regions: Alabama, Florida, Mississippi, Tennessee and Texas. The ultimate recovery of a substantial portion of the carrying amount of other real estate, excluding covered other real estate, is susceptible to changes in market conditions in these areas.

	For the years ended December 31, 2014, 2013 and 2012, changes and gains (losses), net on other real estate, excluding covered other real estate, were as follows ($ in thousands):

			2014			2013			2012
	Balance at beginning of period		$	106,539		$	78,189		$	79,053
	Additions (1)			37,428			80,256			38,894
	Disposals			(43,802	)		(45,545	)		(33,155	)
	Write-downs			(7,656	)		(6,361	)		(6,603	)
	Balance at end of period		$	92,509		$	106,539		$	78,189

	Gain (loss), net on the sale of other real estate included in ORE/Foreclosure expense		$	3,697		$	(881	)	$	(279	)

	-1	Includes $40.1 million of other real estate acquired from BancTrust on February 15, 2013, and $2.6 million of other real estate acquired from Bay Bank on March 16, 2012.

	At December 31, 2014 and 2013, other real estate, excluding covered other real estate, by type of property consisted of the following ($ in thousands):

			2014			2013
	Construction, land development and other land properties		$	61,015		$	65,273
	1-4 family residential properties			10,150			14,696
	Nonfarm, nonresidential properties			19,696			26,433
	Other real estate properties			1,648			137
	Total other real estate, excluding covered other real estate		$	92,509		$	106,539

	At December 31, 2014 and 2013, other real estate, excluding covered other real estate, by geographic location consisted of the following ($ in thousands):

			2014			2013
	Alabama		$	21,196		$	25,912
	Florida			35,324			34,480
	Mississippi (1)			17,397			22,766
	Tennessee (2)			10,292			12,892
	Texas			8,300			10,489
	Total other real estate, excluding covered other real estate		$	92,509		$	106,539

	-1	Mississippi includes Central and Southern Mississippi Regions
	-2	Tennessee includes Memphis, Tennessee and Northern Mississippi Regions

	Covered Other Real Estate

	For the years ended December 31, 2014, 2013 and 2012, changes and gains, net on covered other real estate were as follows ($ in thousands):

			2014			2013			2012
	Balance at beginning of period		$	5,108		$	5,741		$	6,331
	Transfers from covered loans			2,851			1,934			1,424
	FASB ASC 310-30 adjustment for the residual recorded investment			136			(345	)		(112	)
	Net transfers from covered loans			2,987			1,589			1,312
	Disposals			(1,232	)		(1,442	)		(1,631	)
	Write-downs			(803	)		(780	)		(271	)
	Balance at end of period		$	6,060		$	5,108		$	5,741

	Gain, net on the sale of covered other real estate included in ORE/Foreclosure expenses		$	24		$	119		$	485

	At December 31, 2014 and 2013, covered other real estate consisted of the following types of properties ($ in thousands):

			2014			2013
	Construction, land development and other land properties		$	1,917		$	733
	1-4 family residential properties			1,103			1,981
	Nonfarm, nonresidential properties			2,296			2,394
	Other real estate properties			744			-
	Total covered other real estate		$	6,060		$	5,108

FDIC_Indemnification_Asset

FDIC Indemnification Asset	12 Months Ended
FDIC Indemnification Asset	Dec. 31, 2014
FDIC Indemnification Asset [Abstract]
FDIC Indemnification Asset	Note 11 – FDIC Indemnification Asset

	On April 15, 2011, the Mississippi Department of Banking and Consumer Finance closed the Heritage Banking Group (Heritage) and appointed the FDIC as receiver. On the same date, TNB entered into a purchase and assumption agreement with the FDIC in which TNB agreed to assume all of the deposits and purchase essentially all of the assets of Heritage. The FDIC and TNB also entered into a loss-share agreement covering substantially all loans and all other real estate acquired. Under the loss-share agreement, the FDIC will cover 80% of covered loan and other real estate losses incurred. Pursuant to the provisions of the loss-share agreement, TNB may be required to make a true-up payment to the FDIC at the termination of the loss-share agreement should actual losses be less than certain thresholds established in the agreement. TNB calculates the projected true-up payable to the FDIC quarterly and records a FDIC true-up provision for the present value of the projected true-up payable to the FDIC at the termination of the loss-share agreement. TNB’s FDIC true-up provision totaled $2.1 million and $1.7 million at December 31, 2014 and 2013, respectively.

	Trustmark periodically re-estimates the expected cash flows on the acquired covered loans as required by FASB ASC Topic 310-30. For 2014, 2013 and 2012, this analysis resulted in improvements in the estimated future cash flows of the acquired covered loans that remain outstanding as well as lower expected remaining losses on those loans, primarily due to pay-offs of acquired covered loans. The pay-offs and improvements in the estimated expected cash flows of the acquired covered loans resulted in a reduction of the expected loss-share receivable from the FDIC. Reductions of the FDIC indemnification asset resulting from improvements in expected cash flows and covered losses based on the re-estimation of acquired covered loans are amortized over the lesser of the remaining life or contractual period of the acquired covered loan as a yield adjustment consistent with the associated acquired covered loan. Other noninterest income for 2014 and 2013 included $2.1 million and $2.5 million, respectively, of amortization of the FDIC indemnification asset, compared to $245 thousand of accretion during 2012. Amortization of the FDIC indemnification asset resulted from improvements in the expected cash flows and lower loss expectations. During 2014 and 2013, other noninterest income also included a reduction of the FDIC indemnification asset of $800 thousand and $3.4 million, respectively, primarily resulting from loan pay-offs partially offset by loan pools of acquired covered loans with increased loss expectations. Other noninterest income for 2012 included a reduction of the FDIC indemnification asset of $3.7 million as a result of loan pay-offs, improved cash flow projections and lower loss expectations for loan pools of acquired covered loans.

	For the years ended December 31, 2014, 2013 and 2012, changes in the FDIC indemnification asset were as follows ($ in thousands):

		2014			2013			2012
	Balance at beginning of period	$	14,347		$	21,774		$	28,348
	(Amortization) Accretion		(2,074	)		(2,469	)		245
	Transfers to FDIC claims		(4,443	)		(851	)		(2,544	)
	Change in expected cash flows		(517	)		(3,472	)		(3,761	)
	Change in FDIC true-up provision		(316	)		(635	)		(514	)
	Balance at end of period	$	6,997		$	14,347		$	21,774

Deposits

Deposits	12 Months Ended
Deposits	Dec. 31, 2014
Deposits [Abstract]
Deposits	Note 12 – Deposits

	At December 31, 2014 and 2013, deposits consisted of the following ($ in thousands):

		2014		2013
	Noninterest-bearing demand	$	2,748,635	$	2,663,503
	Interest-bearing demand		1,722,581		1,923,701
	Savings		3,280,060		2,997,294
	Time		1,947,082		2,275,404
	Total	$	9,698,358	$	9,859,902


	Interest expense on deposits by type consisted of the following for the years ended December 31, 2014, 2013 and 2012 ($ in thousands):

		2014		2013		2012
	Interest-bearing demand	$	3,151	$	3,948	$	3,975
	Savings		2,949		3,889		6,004
	Time		9,223		11,881		14,625
	Total	$	15,323	$	19,718	$	24,604

	The maturities on outstanding time deposits of $100,000 or more at December 31, 2014 and 2013 are as follows ($ in thousands):

		2014		2013
	3 months or less	$	199,087	$	242,757
	Over 3 months through 6 months		168,886		208,863
	Over 6 months through 12 months		227,130		312,189
	Over 12 months		222,119		208,208
	Total	$	817,222	$	972,017

	The maturities of interest-bearing deposits at December 31, 2014, are as follows ($ in thousands):

	2015	$	1,462,039
	2016		272,973
	2017		114,574
	2018		52,329
	2019 and thereafter		45,167
	Total time deposits		1,947,082
	Interest-bearing deposits with no stated maturity		5,002,641
	Total interest-bearing deposits	$	6,949,723

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2014
Borrowings [Abstract]
Borrowings	Note 13 - Borrowings

	Short-Term Borrowings

	At December 31, 2014 and 2013, short-term borrowings consisted of the following ($ in thousands):

		2014		2013
	FHLB advances	$	356,758	$	2,062
	Serviced GNMA loans eligible for repurchase		41,014		38,036
	Other		27,305		26,287
	Total short-term borrowings	$	425,077	$	66,385

	At December 31, 2014, Trustmark had four outstanding short-term FHLB advances totaling $350.0 million with the FHLB of Dallas. All of the outstanding advances with the FHLB of Dallas had fixed rates and ranged from $50.0 million to $100.0 million with interest rates ranging from 0.10% to 0.18%. At December 31, 2014, these advances had a weighted average remaining maturity of 9 days with a weighted-average cost of 0.14%. Trustmark had no outstanding short-term FHLB advances with the FHLB of Dallas at December 31, 2013. At December 31, 2014 and 2013, Trustmark had $1.678 billion and $1.768 billion, respectively, available in additional short and long-term borrowing capacity from the FHLB of Dallas.

	At both December 31, 2014 and 2013, Trustmark had two outstanding short-term FHLB advances with the FHLB of Atlanta. All of the advances with the FHLB of Atlanta were assumed through the BancTrust merger. The advances outstanding at December 31, 2014 had a weighted average remaining maturity of 297 days with a weighted-average cost of 3.96%. These advances had balances of $80 thousand and $6.5 million with fixed interest rates of 6.95% and 3.92%, respectively. The advances outstanding at December 31, 2013 had a weighted average remaining maturity of 134 days with a weighted-average cost of 4.24%. The advances had balances of $2.0 million and $34 thousand with fixed interest rates of 4.21% and 6.11%, respectively. A fair market value adjustment of $178 thousand and $28 thousand associated with the BancTrust merger was included in the short-term FHLB advances at December 31, 2014 and 2013, respectively. Trustmark has a non-member status and no additional borrowing capacity with the FHLB of Atlanta.

	Interest expense on short-term FHLB advances totaled $197 thousand in 2014, $6 thousand in 2013 and $81 thousand in 2012.

	Long-Term FHLB Advances

	At December 31, 2014, Trustmark had four outstanding long-term FHLB advances totaling $1.2 million with the FHLB of Atlanta, which were assumed through the BancTrust merger. All of the advances outstanding at December 31, 2014 had fixed rates and ranged from $23 thousand to $913 thousand with interest rates ranging from 0.08% to 6.50%. At December 31, 2014, these advances had a weighted average remaining maturity of 7.13 years with a weighted-average cost of 1.11%. At December 31, 2013, Trustmark had six outstanding long-term FHLB advances totaling $8.5 million with the FHLB of Atlanta, which were assumed through the BancTrust merger. All of the advances outstanding at December 31, 2013 had fixed rates and ranged from $30 thousand to $6.5 million with interest rates ranging from 0.08% to 6.95%. At December 31, 2013, these advances had a weighted average remaining maturity of 2.85 years with a weighted-average cost of 3.55%. A fair market value adjustment of $7 thousand and $412 thousand associated with the BancTrust merger was included in the long-term FHLB advances at December 31, 2014 and 2013, respectively. Trustmark’s long-term FHLB advances are collateralized by securities held in safekeeping with the FHLB of Atlanta. Trustmark incurred $45 thousand of interest expense on long-term FHLB advances in 2014, compared to $57 thousand of interest expense in 2013 and no interest expense in 2012.

	Subordinated Notes Payable

	During 2006, TNB issued $50.0 million aggregate principal amount of Subordinated Notes (the Notes) due December 15, 2016. Proceeds from the sale of the Notes were used for general corporate purposes. At December 31, 2014 and 2013, the carrying amount of the Notes was $49.9 million. The Notes have not been, and are not required to be, registered with the U.S. Securities and Exchange Commission (SEC) under the Securities Act of 1933, as amended. The Notes were sold pursuant to the terms of regulations issued by the OCC and in reliance upon an exemption provided by the Securities Act of 1933, as amended. The Notes bear interest at the rate of 5.673% per annum from December 13, 2006, until the principal of the Notes has been paid in full. Interest on the Notes is payable semi-annually in arrears on June 15 and December 15 of each year, commencing June 15, 2007, and through the date of maturity. The Notes are unsecured and subordinate and junior in right of payment to TNB’s obligations to its depositors, its obligations under bankers’ acceptances and letters of credit, its obligations to any Federal Reserve Bank or the FDIC and its obligations to its other creditors, and to any rights acquired by the FDIC as a result of loans made by the FDIC to TNB. The Notes, which are not redeemable prior to maturity, qualify as Tier 2 capital for both TNB and Trustmark. Because the Notes now have a remaining maturity of more than one year, but less than two years, only 20% of the remaining balance qualified as Tier 2 capital for both TNB and Trustmark at December 31, 2014. After December 15, 2015, no portion of the Notes will qualify as Tier 2 capital.

	Junior Subordinated Debt Securities

	On August 18, 2006, Trustmark completed a private placement of $60.0 million of trust preferred securities through a newly formed Delaware trust affiliate, Trustmark Preferred Capital Trust I (the Trust). The trust preferred securities mature September 30, 2036, are redeemable at Trustmark’s option and bear interest at a variable rate per annum equal to the three-month LIBOR plus 1.72%. Under applicable regulatory guidelines, these trust preferred securities qualify as Tier 1 capital. The proceeds from the sale of the trust preferred securities were used by the Trust to purchase $61.9 million in aggregate principal amount of Trustmark’s junior subordinated debentures.

	The debentures were issued pursuant to a Junior Subordinated Indenture, dated August 18, 2006, between Trustmark, as issuer, and Wilmington Trust Company, National Association, as trustee. Like the trust preferred securities, the debentures bear interest at a variable rate per annum equal to the three-month LIBOR plus 1.72% and mature on September 30, 2036. The debentures may be redeemed at Trustmark’s option at any time. The interest payments by Trustmark will be used to pay the quarterly distributions payable by the Trust to the holder of the trust preferred securities. However, so long as no event of default has occurred under the debentures, Trustmark may defer interest payments on the debentures (in which case the Trust will also defer distributions otherwise due on the trust preferred securities) for up to 20 consecutive quarters.

	The debentures are subordinated to the prior payment of any other indebtedness of Trustmark that, by its terms, is not similarly subordinated. The trust preferred securities are recorded as a long-term liability on Trustmark’s balance sheet; however, for regulatory purposes the trust preferred securities are treated as Tier 1 capital under rulings of the Federal Reserve Board, Trustmark’s primary federal regulatory agency.

	Trustmark also entered into a Guarantee Agreement, dated August 18, 2006, pursuant to which it has agreed to guarantee the payment by the Trust of distributions on the trust preferred securities and the payment of principal of the trust preferred securities when due, either at maturity or on redemption, but only if and to the extent that the Trust fails to pay distributions on or principal of the trust preferred securities after having received interest payments or principal payments on the junior subordinated debentures from Trustmark for the purpose of paying those distributions or the principal amount of the trust preferred securities.

	As defined in applicable accounting standards, the Trust, a wholly-owned subsidiary of Trustmark, is considered a variable interest entity for which Trustmark is not the primary beneficiary. Accordingly, the accounts of the Trust are not included in Trustmark’s consolidated financial statements.

	At December 31, 2014 and 2013, total assets for the Trust totaled $61.9 million, resulting from the investment in junior subordinated debentures issued by Trustmark. Liabilities and shareholder’s equity for the Trust also totaled $61.9 million at December 31, 2014 and 2013, resulting from the issuance of trust preferred securities in the amount of $60.0 million as well as $1.9 million in common securities issued to Trustmark. During 2014, net income for the Trust equaled $36.8 thousand resulting from interest income from the junior subordinated debt securities issued by Trustmark to the Trust, compared with net income of $37.6 thousand during 2013 and $41.3 thousand during 2012. Dividends issued to Trustmark by the Trust during 2014 totaled $36.8 thousand, compared to $37.6 thousand during 2013 and $41.3 thousand during 2012.

Income_Taxes

Income Taxes	12 Months Ended
Income Taxes	Dec. 31, 2014
Income Taxes [Abstract]
Income Taxes	Note 14 – Income Taxes

	The income tax provision included in the statements of income was as follows for the years ended December 31, 2014, 2013 and 2012 ($ in thousands):


	Current		2014			2013			2012
	Federal		$	17,761		$	14,537		$	48,186
	State			2,068			1,237			2,366
	Deferred
	Federal			16,256			18,394			(7,349	)
	State			2,444			2,769			(1,103	)
	Income tax provision		$	38,529		$	36,937		$	42,100

	For the years ended December 31, 2014, 2013 and 2012, the income tax provision differs from the amount computed by applying the statutory federal income tax rate of 35% to income before income taxes as a result of the following ($ in thousands):

			2014			2013			2012
	Income tax computed at statutory tax rate		$	56,732		$	53,899		$	55,784
	Tax exempt interest			(5,612	)		(5,222	)		(5,150	)
	Nondeductible interest expense			107			121			144
	State income taxes, net			2,933			2,604			821
	Income tax credits			(15,212	)		(15,755	)		(9,255	)
	Other			(419	)		1,290			(244	)
	Income tax provision		$	38,529		$	36,937		$	42,100

	Temporary differences between the financial statement carrying amounts and the tax basis of assets and liabilities gave rise to the following net deferred tax assets at December 31, 2014 and 2013, which are included in other assets ($ in thousands):

	Deferred tax assets:		2014			2013
	Loan purchase accounting		$	38,471		$	63,048
	Other real estate			36,086			47,981
	Allowance for loan losses			31,241			29,102
	Deferred compensation			20,825			20,000
	Realized built in losses			15,907			9,182
	Securities			15,443			17,741
	Pension and other postretirement benefit plans			14,904			7,511
	Nonaccrual loans			3,372			4,452
	Stock-based compensation			3,077			3,357
	Other			17,833			14,771
	Gross deferred tax asset			197,159			217,145
	Valuation allowance			(8,650	)		(16,000	)
	Deferred tax asset net of valuation allowance			188,509			201,145

	Deferred tax liabilities:
	Goodwill and other identifiable intangibles			28,010			29,809
	Premises and equipment			20,813			21,543
	Unrealized gains on securities available for sale			8,627			1,969
	Mortgage servicing rights			7,747			8,145
	Securities			1,353			1,270
	Leases			625			3,290
	Other			3,900			4,642
	Gross deferred tax liability			71,075			70,668
	Net deferred tax asset		$	117,434		$	130,477

	Trustmark has evaluated the need for a valuation allowance and, based on the weight of the available evidence, has determined that it is more likely than not that a portion of deferred tax assets will not be realized due to limitations on the deductibility of built in losses in future years. A valuation allowance, which was created as a result of the BancTrust merger in 2013 and reduced in 2014 as a result of measurement period adjustments, has been established to reduce deferred tax assets to the amount that will more likely than not be realized in future years. For additional information regarding the merger with BancTrust and the measurement period adjustments recorded, see Note 2 – Business Combinations located elsewhere in this report.

	The following table provides a summary of the changes during the 2014 calendar year in the amount of unrecognized tax benefits that are included in other liabilities in the consolidated balance sheet ($ in thousands):

	Balance at January 1, 2014		$	1,779
	Increases due to tax positions taken during the current year			670
	Increases due to tax positions taken during a prior year			60
	Decreases due to the lapse of applicable statute of limitations during the current year			(306	)
	Decreases due to settlements with taxing authorities during the current year			(43	)
	Balance at December 31, 2014		$	2,160

	Accrued interest, net of federal benefit, at December 31, 2014		$	437

Unrecognized tax benefits that would impact the effective tax rate, if recognized, at December 31, 2014		$	1,603

Interest and penalties related to unrecognized tax benefits, if any, are recorded in income tax expense. With limited exception, Trustmark is no longer subject to U.S. federal, state and local audits by tax authorities for 2008 and earlier tax years. Trustmark does not anticipate a significant change to the total amount of unrecognized tax benefits within the next twelve months.

Defined_Benefit_and_Other_Post

Defined Benefit and Other Postretirement Benefits	12 Months Ended
Defined Benefit and Other Postretirement Benefits	Dec. 31, 2014
Defined Benefit and Other Postretirement Benefits [Abstract]
Defined Benefit and Other Postretirement Benefits	Note 15 – Defined Benefit and Other Postretirement Benefits

	Qualified Pension Plans

	Trustmark maintains a noncontributory tax-qualified defined benefit pension plan (Trustmark Capital Accumulation Plan), in which substantially all associates employed prior to 2007 participate. The plan provides retirement benefits that are based on the length of credited service and final average compensation, as defined in the plan and vest upon three years of service. Benefit accruals under the plan were frozen during 2009, with the exception of certain associates covered through plans obtained by acquisitions that were subsequently merged into the Trustmark plan. Associates have not earned additional benefits, except for interest as required by Internal Revenue Service (IRS) regulations, since the plan was frozen. Current and former associates who participate in the plan retain their right to receive benefits that accrued before the plan was frozen.

	As a result of the BancTrust merger on February 15, 2013, Trustmark became the sponsor of the Retirement Plan for Employees of BancTrust Financial Group, Inc. (BancTrust Pension Plan), a tax-qualified defined benefit pension plan, which was frozen prior to the merger date. On January 28, 2014, Trustmark's Board of Directors authorized the termination of the BancTrust Pension Plan effective as of April 15, 2014. The IRS has been asked to review the BancTrust Pension Plan’s tax qualification at its termination, and it is anticipated that the IRS will issue a favorable determination letter with respect to the plan’s termination once its review is complete. In addition, as required by law, a termination notice has been filed with the Pension Benefit Guaranty Corporation (PBGC), and it is not anticipated that the PBGC will raise any issues with respect to the plan’s termination. During 2014, the assets of the BancTrust Pension plan were held in trust and distributed in conjunction with the plan termination. All assets of the BancTrust Pension Plan were distributed as of December 31, 2014. Benefits that were not paid to participants were annuitized under annuity contracts. As a result of the termination of the plan, Trustmark recognized a pre-tax gain of $1.2 million during 2014.

	The following tables present information regarding the benefit obligation, plan assets, funded status, amounts recognized in accumulated other comprehensive loss, net periodic benefit cost and other statistical disclosures for Trustmark’s qualified defined benefit pension plans (Trustmark Capital Accumulation Plan and BancTrust Pension Plan) ($ in thousands):

			December 31,
			2014				2013
	Change in benefit obligation:
	Benefit obligation, beginning of year		$	128,974			$	103,235
	Benefit obligation from business combination			-				43,138
	Service cost			495				595
	Interest cost			5,299				4,758
	Actuarial loss (gain)			11,675				(8,060	)
	Benefits paid for BancTrust Pension Plan			(38,853	)			-
	Benefits paid for Trustmark Capital Accumulation Plan			(7,041	)			(14,692	)
	Settlement loss from BancTrust termination			1,355				-
	Benefit obligation, end of year		$	101,904			$	128,974

	Change in plan assets:
	Fair value of plan assets, beginning of year		$	126,142			$	76,660
	Fair value of plan assets from business combination			-				40,391
	Actual return on plan assets			4,632				21,661
	Employer contributions			1,407				2,122
	Benefit payments for BancTrust Pension Plan			(38,853	)			-
	Benefit payments for Trustmark Capital Accumulation Plan			(7,041	)			(14,692	)
	Fair value of plan assets, end of year		$	86,287			$	126,142

	Funded status at end of year - net liability		$	(15,617	)		$	(2,832	)

	Amounts recognized in accumulated other comprehensive loss:
	Net loss - amount recognized		$	28,100			$	15,436

			Years Ended December 31,
			2014				2013				2012
	Net periodic benefit cost:
	Service cost		$	495			$	595			$	547
	Interest cost			5,299				4,758				3,942
	Expected return on plan assets			(6,245	)			(7,720	)			(5,983	)
	Recognized net loss due to BancTrust termination			1,355				-				-
	Recognized net loss due to lump sum settlements			905				2,225				-
	Recognized net actuarial (gain) loss			(283	)			5,516				5,225
	Net periodic benefit cost		$	1,526			$	5,374			$	3,731

	Other changes in plan assets and benefit obligation recognized in other comprehensive income (loss), before taxes:
	Net loss (gain) - Total recognized in other comprehensive income (loss)		$	12,664			$	(29,742	)		$	(3,861	)
	Total recognized in net periodic benefit cost and other comprehensive income (loss)		$	14,190			$	(24,368	)		$	(130	)

	Weighted-average assumptions as of end of year:
	Discount rate for benefit obligation			3.57	%			4.3	%			3.5	%
	Discount rate for net periodic benefit cost			4.3	%			3.5	%			4	%
	Expected long-term return on plan assets			7.5	%			7.5	%			8	%

	Plan Assets

	The weighted-average asset allocations by asset category for Trustmark’s qualified defined benefit pension plans at December 31, 2014 and 2013 are presented below. Due to the termination and full distribution of the BancTrust Pension Plan during 2014, December 31, 2014 includes only amounts related to the Trustmark Capital Accumulation Plan.

			2014				2013
	Money market fund			8.7	%			5.2	%
	Fixed income mutual funds			11.9	%			17.6	%
Equity mutual funds			72.2	%			58.4	%
Equity securities			7	%			18.7	%
Fixed income hedge fund			0.2	%			0.1	%
Total			100	%			100	%

The strategic objective of the investments of the assets in the Trustmark Capital Accumulation Plan is capital growth with moderate income. The qualified defined benefit pension plan is managed on a total return basis with the return objective set as a reasonable actuarial rate of return on plan assets net of investment management fees. Moderate risk is assumed given the average age of plan participants and the need to meet the required rate of return. Equity and fixed income securities are utilized to allow for capital appreciation while fully diversifying the portfolio with more conservative fixed income investments. The target asset allocation range for the portfolio is 0-10% Cash and Cash Equivalents, 10-30% Fixed Income, 30-55% Domestic Equity, 10-30% International Equity and 0-20% Other Investments. Changes in allocations are a result of tactical asset allocation decisions and fall within the aforementioned percentage range for each major asset class.

Trustmark selects the expected long-term rate-of-return-on-assets assumption in consultation with its investment advisors and actuary. This rate is intended to reflect the average rate of earnings expected to be earned on the funds invested or to be invested to provide plan benefits. Historical performance is reviewed, especially with respect to real rates of return (net of inflation), for the major asset classes held or anticipated to be held by the trust and for the trust itself. Undue weight is not given to recent experience that may not continue over the measurement period, with higher significance placed on current forecasts of future long-term economic conditions.

Because assets are held in a qualified trust, anticipated returns are not reduced for taxes. Further, solely for this purpose, the qualified defined benefit pension plans are assumed to continue in force and not terminate during the period in which assets are invested. However, consideration is given to the potential impact of current and future investment policy, cash flow into and out of the trust and expenses (both investment and non-investment) typically paid from plan assets (to the extent such expenses are not explicitly estimated within periodic cost).

Fair Value Measurements

At this time, Trustmark presents no fair values that are derived through internal modeling. Should positions requiring fair valuation arise that are not relevant to existing methodologies, Trustmark will make every reasonable effort to obtain market participant assumptions, or independent evaluation.

The following table sets forth by level, within the fair value hierarchy, the qualified defined benefit pension plans’ assets measured at fair value at December 31, 2014 and 2013 ($ in thousands):

		31-Dec-14
		Total				Level 1				Level 2				Level 3
Money market fund		$	7,544			$	7,544			$	-			$	-
Fixed income mutual funds			10,267				10,267				-				-
Equity mutual funds			62,265				62,265				-				-
Equity securities			6,057				6,057				-				-
Fixed income hedge fund			154				-				-				154
Total assets at fair value		$	86,287			$	86,133			$	-			$	154

		31-Dec-13
		Total				Level 1				Level 2				Level 3
Money market fund		$	6,563			$	6,563			$	-			$	-
Fixed income mutual funds			22,225				15,245				6,980				-
Equity mutual funds			73,608				73,608				-				-
Equity securities			23,583				23,583				-				-
Fixed income hedge fund			163				-				-				163
Total assets at fair value		$	126,142			$	118,999			$	6,980			$	163

The following table sets forth a summary of changes in fair value of the Level 3 plan assets for the years ended December 31, 2014 and 2013 ($ in thousands):

		Fixed Income Hedge Fund
Balance, January 1, 2013		$	163
Change in fair value			-
Balance, December 31, 2013			163
Change in fair value			(9	)
Balance, December 31, 2014		$	154

There have been no changes in the methodologies used in estimating the fair value of plan assets at December 31, 2014. The methodology and significant assumptions used in estimating the fair values presented above are as follows:

	·	Money market fund approximates fair value due to its immediate maturity.
	·	Fixed income hedge fund is valued in accordance with the valuation provided by the general partner of the underlying partnership.

The preceding methods described may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, although the qualified defined benefit pension plans believe their valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date.

Contributions

The range of potential contributions to Trustmark’s qualified defined benefit pension plans is determined annually by the plans’ actuary in accordance with applicable IRS rules and regulations. Trustmark's policy is to fund amounts that are sufficient to satisfy the annual minimum funding requirements and are deductible for federal income tax purposes. The actual amount of the contribution is determined annually based on the plans’ funded status and return on plan assets as of the measurement date, which is December 31. For the plan year ended December 31, 2013, Trustmark made minimum required contributions to the Trustmark Capital Accumulation Plan of $2.1 million. For the plan year ending December 31, 2014, the minimum required contribution for Trustmark’s Capital Accumulation Plan was expected to be $1.8 million prior to the passage of the Highway and Transportation Funding Act (HATFA). Trustmark contributed approximately $1.0 million to the Trustmark Capital Accumulation Plan prior to the passage of HATFA. HATFA extends the pension funding relief for several more years and was mandatory for 2014. As a result of HATFA, there was no minimum required contribution for the plan year ending December 31, 2014. Therefore, no additional contributions were made during 2014. For the plan year ending December 31, 2015, Trustmark’s minimum required contribution to the Trustmark Capital Accumulation Plan is expected to be zero; however, Management and the Board of Directors will monitor the plan throughout 2015 to determine any additional funding requirements by the plan’s measurement date. A contribution of $334 thousand was required during 2014 for the BancTrust Pension Plan in order to complete the plan termination. Since the plan has terminated, there will be no additional contributions required in the future.

Estimated Future Benefit Payments and Other Disclosures

The following table presents the expected benefit payments, which reflect expected future service, for Trustmark’s Capital Accumulation Plan ($ in thousands):

Year		Amount
2015		$	10,654
2016			8,402
2017			7,734
2018			6,346
2019			6,286
2020 - 2024			28,762

Amounts in accumulated other comprehensive loss expected to be recognized as components of net periodic benefit cost during 2015 include a net loss of $5.0 million.

Supplemental Retirement Plans

Trustmark maintains a nonqualified supplemental retirement plan covering directors who elected to defer fees, key executive officers and senior officers. The plan provides for defined death benefits and/or retirement benefits based on a participant's covered salary. Trustmark has acquired life insurance contracts on the participants covered under the plan, which may be used to fund future payments under the plan. The measurement date for the plan is December 31. As a result of the BancTrust merger on February 15, 2013, Trustmark became the administrator of an additional nonqualified supplemental retirement plan, for which the plan benefits were frozen prior to the merger date.

The following tables present information regarding the benefit obligation, plan assets, funded status, amounts recognized in accumulated other comprehensive loss, net periodic benefit cost and other statistical disclosures for Trustmark’s nonqualified supplemental retirement plans ($ in thousands):

		December 31,
		2014				2013
Change in benefit obligation:
Benefit obligation, beginning of year		$	52,489			$	56,619
Benefit obligation from business combination			-				1,658
Service cost			296				597
Interest cost			2,198				1,943
Actuarial loss (gain)			7,392				(4,187	)
Benefits paid			(2,631	)			(4,141	)
Benefit obligation, end of year		$	59,744			$	52,489

Change in plan assets:
Fair value of plan assets, beginning of year		$	-			$	-
Employer contributions			2,631				4,141
Benefit payments			(2,631	)			(4,141	)
Fair value of plan assets, end of year		$	-			$	-

Funded status at end of year - net liability		$	(59,744	)		$	(52,489	)

Amounts recognized in accumulated other comprehensive loss:
Net loss		$	21,242			$	14,509
Prior service cost			1,860				2,110
Amounts recognized		$	23,102			$	16,619


		Years Ended December 31,
		2014				2013				2012
Net periodic benefit cost:
Service cost		$	296			$	597			$	679
Interest cost			2,198				1,943				2,067
Amortization of prior service cost			250				250				250
Recognized net actuarial loss			661				1,038				861
Net periodic benefit cost		$	3,405			$	3,828			$	3,857

Other changes in plan assets and benefit obligation recognized in other comprehensive income (loss), before taxes:
Net loss (gain)		$	6,733			$	(5,224	)		$	2,507
Prior service cost			-				-				198
Amortization of prior service cost			(250	)			(250	)			(250	)
Total recognized in other comprehensive income (loss)		$	6,483			$	(5,474	)		$	2,455
Total recognized in net periodic benefit cost and other comprehensive income (loss)		$	9,888			$	(1,646	)		$	6,312

Weighted-average assumptions as of end of year:
Discount rate for benefit obligation			3.57	%			4.3	%			3.5	%
Discount rate for net periodic benefit cost			4.3	%			3.5	%			4	%

Estimated Supplemental Retirement Plan Payments and Other Disclosures

The following table presents the expected benefits payments for Trustmark’s supplemental retirement plans ($ in thousands):

Year		Amount
2015		$	2,868
2016			3,145
2017			3,479
2018			3,591
2019			3,656
2020 - 2024			19,504

Amounts in accumulated other comprehensive loss expected to be recognized as components of net periodic benefit cost during 2015 include a loss of $992 thousand and prior service cost of $250 thousand.

Other Benefit Plans

Defined Contribution Plan

Trustmark provides associates with a self-directed 401(k) retirement plan that allows associates to contribute a percentage of base pay, within limits provided by the Internal Revenue Code and accompanying regulations, into the plan. Trustmark matches 100% of associate contributions to the plan based on the amount of each participant’s contributions up to a maximum of 6% of eligible compensation. Associates may become eligible to make elective deferral contributions the first of the month following 30 days of employment. Eligible associates must complete one year of service in order to vest in Trustmark’s matching contributions. Trustmark's contributions to this plan were $6.7 million in 2014, $6.8 million in 2013 and $5.7 million in 2012.

Stock_and_Incentive_Compensati

Stock and Incentive Compensation Plans	12 Months Ended
Stock and Incentive Compensation Plans	Dec. 31, 2014
Stock and Incentive Compensation Plans [Abstract]
Stock and Incentive Compensation Plans	Note 16 – Stock and Incentive Compensation Plans

	Trustmark has granted stock and incentive compensation awards subject to the provisions of the 1997 Long Term Incentive Plan (the 1997 Plan) and the 2005 Stock and Incentive Compensation Plan (the 2005 Plan). New awards have not been issued under the 1997 Plan since it was replaced by the 2005 Plan. At December 31, 2014, no awards remain outstanding under the 1997 Plan. The 2005 Plan is designed to provide flexibility to Trustmark regarding its ability to motivate, attract and retain the services of key associates and directors. The 2005 Plan allows Trustmark to make grants of nonqualified stock options, incentive stock options, stock appreciation rights, restricted stock, restricted stock units and performance units to key associates and directors. At December 31, 2014, the maximum number of shares of Trustmark’s common stock available for issuance under the 2005 Plan was 5,466,172 shares.

	The following table summarizes the stock and incentive plans’ vesting periods and contractual terms in years:

			Vesting				Contractual
			Period				Term
	Stock option awards - 1997 plan			4				10
	Stock option awards - 2005 plan			5				7
	Performance awards (includes achievement shares for grants after 2013)			3				-
	Achievement shares from performance grants prior to 2013			3				-
	Time-vested awards			3				-

	Stock Option Grants

	Stock option awards under the 1997 Plan and the 2005 Plan were granted with an exercise price equal to the market price of Trustmark’s stock on the date of grant, and vested equally in annual increments. Compensation expense related to stock options was fully recognized during 2011. Compensation expense for stock options granted under these plans was estimated using the fair value of each option granted using the Black-Scholes option-pricing model and was recognized on the straight-line method over the requisite service period. No stock options have been granted since 2006, when Trustmark began granting restricted stock awards exclusively.

	The following table summarizes Trustmark’s stock option activity for the years ended December 31, 2014, 2013 and 2012:

			2014							2013							2012
	Options		Shares				Average			Shares				Average			Shares				Average
							Option							Option							Option
							Price							Price							Price
	Outstanding, beginning of year			105,450			$	27.43			699,600			$	27.58			1,205,100			$	27.31
	Exercised			-				-			(187,300	)			26.96			(11,125	)			24.09
	Expired			(105,450	)			27.43			(406,850	)			27.9			(494,375	)			27.01
	Outstanding, end of year			-				-			105,450			$	27.43			699,600			$	27.58

	Exercisable, end of year			-				-			105,450			$	27.43			699,600			$	27.58

	The total intrinsic value of options exercised was zero in 2014, $191 thousand in 2013 and $16 thousand in 2012.

	Restricted Stock Grants

	Performance Awards
	Trustmark’s performance awards are granted to Trustmark’s executive and senior management team. Performance awards granted vest based on performance goals of return on average tangible equity (ROATE) and total shareholder return (TSR) compared to a defined peer group. Performance awards are valued utilizing a Monte Carlo simulation model to estimate fair value of the awards at the grant date. These awards are recognized using the straight-line method over the requisite service period. These awards provide for achievement shares if performance measures exceed 100%. The restricted share agreement provides for voting rights and dividend privileges.

	The following table summarizes Trustmark’s performance award activity for the years ended December 31, 2014, 2013 and 2012:

			2014							2013							2012
			Shares				Weighted-			Shares				Weighted-			Shares				Weighted-
							Average							Average							Average
							Grant-Date							Grant-Date							Grant-Date
							Fair Value							Fair Value							Fair Value
	Nonvested shares, beginning of year			160,520			$	25.2			159,583			$	24.26			179,421			$	20.3
	Granted			73,726				25.58			62,119				23.65			55,295				25.66
	Released from restriction			(38,580	)			25.4			(54,784	)			24.15			(72,632	)			21.38
	Forfeited			(14,471	)			24.86			(6,398	)			25.42			(2,501	)			24.7
	Nonvested shares, end of year			181,195			$	24.98			160,520			$	25.2			159,583			$	24.26


	Time-Vested Awards

	Trustmark’s time-vested awards are granted to Trustmark’s Board of Directors, executive and senior management team. Time-vested awards are valued utilizing the fair value of Trustmark’s stock at the grant date. These awards are recognized on the straight-line method over the requisite service period.

	The following table summarizes Trustmark’s time-vested award activity for the years ended December 31, 2014, 2013 and 2012:

			2014							2013							2012
			Shares				Weighted-			Shares				Weighted			Shares				Weighted
							Average							Average							Average
							Grant-Date							Grant-Date							Grant-Date
							Fair Value							Fair Value							Fair Value
	Nonvested shares, beginning of year			291,634			$	24.48			317,573			$	23.28			334,356			$	21.04
Granted			105,690				24.91			112,964				24.47			141,616				24.66
Released from restriction			(124,869	)			24.74			(122,727	)			24.4			(151,331	)			23.14
Forfeited			(8,550	)			24.77			(16,176	)			25.14			(7,068	)			24.14
Nonvested shares, end of year			263,905			$	24.66			291,634			$	24.48			317,573			$	23.28

The following table presents information regarding compensation expense for all stock and incentive plans for the periods presented ($ in thousands):

		Recognized Compensation Expense											Unrecognized Compensation			Weighted
		for Years Ended December 31,														Average Life
																of Unrecognized
																Compensation
		2014				2013			2012				Expense			Expense
Performance awards		$	1,065			$	825		$	868			$	1,197			1.73
Time-vested awards			3,087				2,774			3,105				3,619			1.76
Total		$	4,152			$	3,599		$	3,973			$	4,816

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies [Abstract]
Commitments and Contingencies	Note 17 – Commitments and Contingencies

	Lending Related

	Trustmark makes commitments to extend credit and issues standby and commercial letters of credit (letters of credit) in the normal course of business in order to fulfill the financing needs of its customers. The carrying amount of commitments to extend credit and letters of credit approximates the fair value of such financial instruments. These amounts are not material to Trustmark’s financial statements.

	Commitments to extend credit are agreements to lend money to customers pursuant to certain specified conditions. Commitments generally have fixed expiration dates or other termination clauses. Because many of these commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The exposure to credit loss in the event of nonperformance by the other party to the commitments to extend credit is represented by the contract amount of those instruments. Trustmark applies the same credit policies and standards as it does in the lending process when making these commitments. The collateral obtained is based upon the assessed creditworthiness of the borrower. At December 31, 2014 and 2013, Trustmark had unused commitments to extend credit of $2.489 billion and $2.193 billion, respectively.

	Letters of credit are conditional commitments issued by Trustmark to insure the performance of a customer to a third-party. A financial standby letter of credit irrevocably obligates Trustmark to pay a third-party beneficiary when a customer fails to repay an outstanding loan or debt instrument. A performance standby letter of credit irrevocably obligates Trustmark to pay a third-party beneficiary when a customer fails to perform some contractual, nonfinancial obligation. When issuing letters of credit, Trustmark uses essentially the same policies regarding credit risk and collateral which are followed in the lending process. At December 31, 2014 and 2013, Trustmark’s maximum exposure to credit loss in the event of nonperformance by the other party for letters of credit was $132.8 million and $143.2 million, respectively. These amounts consist primarily of commitments with maturities of less than three years, which have an immaterial carrying value. Trustmark holds collateral to support standby letters of credit when deemed necessary. As of December 31, 2014, the fair value of collateral held was $31.5 million.

	Lease Commitments

	Trustmark currently has operating lease commitments for banking premises and equipment, which expire from 2015 to 2029. It is expected that certain leases will be renewed, or equipment replaced, as leases expire. Rental expense totaled $8.5 million in 2014, $8.4 million in 2013 and $7.4 million in 2012.

	At December 31, 2014, future minimum rental commitments under non-cancellable operating leases are as follows ($ in thousands):

	Year	Amount
	2015	$	6,010
	2016		4,034
	2017		3,568
	2018		3,140
	2019		2,585
	Thereafter		11,960
	Total	$	31,297

	Legal Proceedings

	Trustmark’s wholly-owned subsidiary, TNB, has been named as a defendant in two lawsuits related to the collapse of the Stanford Financial Group. The first is a purported class action complaint that was filed on August 23, 2009 in the District Court of Harris County, Texas, by Peggy Roif Rotstain, Guthrie Abbott, Catherine Burnell, Steven Queyrouze, Jaime Alexis Arroyo Bornstein and Juan C. Olano, on behalf of themselves and all others similarly situated, naming TNB and four other financial institutions unaffiliated with Trustmark as defendants. The complaint seeks to recover (i) alleged fraudulent transfers from each of the defendants in the amount of fees and other monies received by each defendant from entities controlled by R. Allen Stanford (collectively, the “Stanford Financial Group”) and (ii) damages allegedly attributable to alleged conspiracies by one or more of the defendants with the Stanford Financial Group to commit fraud and/or aid and abet fraud on the asserted grounds that defendants knew or should have known the Stanford Financial Group was conducting an illegal and fraudulent scheme. Plaintiffs have demanded a jury trial. Plaintiffs did not quantify damages. In November 2009, the lawsuit was removed to federal court by certain defendants and then transferred by the United States Panel on Multidistrict Litigation to federal court in the Northern District of Texas (Dallas) where multiple Stanford related matters are being consolidated for pre-trial proceedings. In May 2010, all defendants (including TNB) filed motions to dismiss the lawsuit, and the motions to dismiss have been fully briefed by all parties. The court has not yet ruled on TNB’s motion to dismiss. In August 2010, the court authorized and approved the formation of an Official Stanford Investors Committee (“OSIC”) to represent the interests of Stanford investors and, under certain circumstances, to file legal actions for the benefit of Stanford investors. In December 2011, the OSIC filed a motion to intervene in this action. In September 2012, the district court referred the case to a magistrate judge for hearing and determination of certain pretrial issues. In December 2012, the court granted the OSIC’s motion to intervene, and the OSIC filed an Intervenor Complaint against one of the other defendant financial institutions. In February 2013, the OSIC filed an additional Intervenor Complaint that asserts claims against TNB and the remaining defendant financial institutions. The OSIC seeks to recover: (i) alleged fraudulent transfers in the amount of the fees each of the defendants allegedly received from Stanford Financial Group, the profits each of the defendants allegedly made from Stanford Financial Group deposits, and other monies each of the defendants allegedly received from Stanford Financial Group; (ii) damages attributable to alleged conspiracies by each of the defendants with the Stanford Financial Group to commit fraud and/or aid and abet fraud and conversion on the asserted grounds that the defendants knew or should have known the Stanford Financial Group was conducting an illegal and fraudulent scheme; and (iii) punitive damages. The OSIC did not quantify damages. In July 2013, all defendants (including TNB) filed motions to dismiss the OSIC’s claims. The court has not yet ruled on TNB’s motion to dismiss the OSIC’s claims.

	The second Stanford-related lawsuit was filed on December 14, 2009 in the District Court of Ascension Parish, Louisiana, individually by Harold Jackson, Paul Blaine, Carolyn Bass Smith, Christine Nichols, and Ronald and Ramona Hebert naming TNB (misnamed as Trust National Bank) and other individuals and entities not affiliated with Trustmark as defendants. The complaint seeks to recover the money lost by these individual plaintiffs as a result of the collapse of the Stanford Financial Group (in addition to other damages) under various theories and causes of action, including negligence, breach of contract, breach of fiduciary duty, negligent misrepresentation, detrimental reliance, conspiracy, and violation of Louisiana’s uniform fiduciary, securities, and racketeering laws. The complaint does not quantify the amount of money the plaintiffs seek to recover. In January 2010, the lawsuit was removed to federal court by certain defendants and then transferred by the United States Panel on Multidistrict Litigation to federal court in the Northern District of Texas (Dallas) where multiple Stanford related matters are being consolidated for pre-trial proceedings. On March 29, 2010, the court stayed the case. TNB filed a motion to lift the stay, which was denied on February 28, 2012. In September 2012, the district court referred the case to a magistrate judge for hearing and determination of certain pretrial issues.

	TNB’s relationship with the Stanford Financial Group began as a result of Trustmark’s acquisition of a Houston-based bank in August 2006, and consisted of correspondent banking and other traditional banking services in the ordinary course of business. Both Stanford-related lawsuits are in their preliminary stages and have been previously disclosed by Trustmark.

	TNB was the defendant in two putative class actions challenging TNB’s practices regarding "overdraft" or "non-sufficient funds" fees charged by TNB in connection with customer use of debit cards, including TNB’s order of processing transactions, notices and calculations of charges, and calculations of fees. Both of those cases have now been dismissed pursuant to a court-approved class action settlement. The period has ended in which any party could appeal the order approving the settlement.

	The settlement of $4.0 million, or $2.5 million net of taxes, was included in other noninterest expense during 2013. The Settlement Administrator has begun distributing the settlement funds. The settlement resolved potential claims of more than 100,000 class members. A total of sixteen customers excluded themselves from the class action settlement. None of those customers have subsequently asserted any claim or made demands on TNB due to overdraft or non-sufficient funds fees.

	Trustmark and its subsidiaries are also parties to other lawsuits and other claims that arise in the ordinary course of business. Some of the lawsuits assert claims related to the lending, collection, servicing, investment, trust and other business activities, and some of the lawsuits allege substantial claims for damages.

	All pending legal proceedings described above are being vigorously contested. In the regular course of business, Management evaluates estimated losses or costs related to litigation, and provision is made for anticipated losses whenever Management believes that such losses are probable and can be reasonably estimated. At the present time, Management believes, based on the advice of legal counsel and Management’s evaluation, that (i) the final resolution of pending legal proceedings described above will not, individually or in the aggregate, have a material impact on Trustmark’s consolidated financial position or results of operations and (ii) a loss in any such case is not probable at this time, and thus no accrual is required under FASB ASC Topic 450-20, “Loss Contingencies.”

Shareholders_Equity

Shareholders' Equity	12 Months Ended
Shareholders' Equity	Dec. 31, 2014
Shareholders' Equity [Abstract]
Shareholders' Equity	Note 18 – Shareholders' Equity

	Regulatory Capital

	Trustmark and TNB are subject to minimum risk-based capital and leverage capital requirements, which are administered by the federal bank regulatory agencies. These capital requirements, as defined by federal regulations, involve quantitative and qualitative measures of assets, liabilities and certain off-balance sheet instruments. Failure to meet minimum capital requirements can result in certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the financial statements of Trustmark and TNB. As of December 31, 2014, Trustmark and TNB exceeded all applicable minimum capital standards for the parent company and its primary banking subsidiary. In addition, TNB met applicable regulatory guidelines to be considered well-capitalized at December 31, 2014. To be categorized in this manner, TNB maintained minimum total risk-based capital, Tier 1 risk-based capital and Tier 1 leverage ratios as set forth in the accompanying table. There are no significant conditions or events that have occurred since December 31, 2014, which Management believes have affected Trustmark’s or TNB's present classification. As of January 1, 2015, Trustmark and TNB were subject to revised capital requirements as described in the section captioned “Supervision and Regulation - Capital Adequacy” included in Part I. Item 1. – Business, located elsewhere in this report. Management believes that Trustmark and TNB are considered well-capitalized under these revised standards.

	The following table provides Trustmark's and TNB's actual regulatory capital amounts and ratios for the periods presented under regulatory capital standards then in effect ($ in thousands):

																		Minimum Regulatory
			Actual								Minimum Regulatory							Provision to be
			Regulatory Capital								Capital Required							Well-Capitalized
			Amount				Ratio				Amount				Ratio			Amount			Ratio
	At December 31, 2014:
	Total Capital (to Risk Weighted Assets)
	Trustmark Corporation		$	1,221,292				14.56	%		$	671,024				8	%		n/	a		n/	a
	Trustmark National Bank			1,198,697				14.32	%			669,856				8	%	$	837,320			10	%

	Tier 1 Capital (to Risk Weighted Assets)
	Trustmark Corporation		$	1,129,630				13.47	%		$	335,512				4	%		n/	a		n/	a
	Trustmark National Bank			1,108,399				13.24	%			334,928				4	%	$	502,392			6	%

	Tier 1 Capital (to Average Assets)
	Trustmark Corporation		$	1,129,630				9.63	%		$	469,411				4	%		n/	a		n/	a
	Trustmark National Bank			1,108,399				9.46	%			468,783				4	%	$	585,979			5	%

	At December 31, 2013:
	Total Capital (to Risk Weighted Assets)
	Trustmark Corporation		$	1,122,904				14.18	%		$	633,310				8	%		n/	a		n/	a
	Trustmark National Bank			1,076,391				13.74	%			626,672				8	%	$	783,340			10	%

	Tier 1 Capital (to Risk Weighted Assets)
	Trustmark Corporation		$	1,026,858				12.97	%		$	316,655				4	%		n/	a		n/	a
	Trustmark National Bank			982,925				12.55	%			313,336				4	%	$	470,004			6	%

	Tier 1 Capital (to Average Assets)
	Trustmark Corporation		$	1,026,858				9.06	%		$	453,487				4	%		n/	a		n/	a
	Trustmark National Bank			982,925				8.76	%			448,665				4	%	$	560,831			5	%

	Dividends on Common Stock

	Dividends paid by Trustmark are substantially funded from dividends received from TNB. Approval by TNB's regulators is required if the total of all dividends declared in any calendar year exceeds the total of its net income for that year combined with its retained net income of the preceding two years. TNB will have available in 2015 approximately $114.3 million plus its net income for that year to pay as dividends.

	Accumulated Other Comprehensive (Loss) Income

	The following table presents the components of accumulated other comprehensive (loss) income and the related tax effects allocated to each component for the years ended December 31, 2014, 2013 and 2012 ($ in thousands). Reclassification adjustments related to securities available for sale are included in securities gains, net in the accompanying consolidated statements of income. The amortization of prior service cost, recognized net loss due to BancTrust termination, recognized net loss due to lump sum settlements and recognized net actuarial (loss) gain on pension and other postretirement benefit plans are included in the computation of net periodic benefit cost (see Note 15 – Defined Benefit and Other Postretirement Benefits for additional details). Reclassification adjustments related to the cash flow hedge derivative are included in other interest expense in the accompanying consolidated statements of income.

			Before Tax				Tax (Expense)				Net of Tax
			Amount				Benefit				Amount
	Year Ended December 31, 2014:
	Securities available for sale and transferred securities:
	Unrealized holding gains arising during the period		$	17,705			$	(6,772	)		$	10,933
	Reclassification adjustment for net gains realized in net income			(300	)			115				(185	)
	Change in net unrealized holding loss on securities transferred to held to maturity			6,010				(2,299	)			3,711
	Total securities available for sale and transferred securities			23,415				(8,956	)			14,459
	Pension and other postretirement benefit plans:
	Net change in prior service costs			249				(95	)			154
	Recognized net loss due to BancTrust termination			1,355				(518	)			837
	Recognized net loss due to lump sum settlements			905				(346	)			559
	Recognized net actuarial loss			(21,657	)			8,283				(13,374	)
	Total pension and other postretirement benefit plans			(19,148	)			7,324				(11,824	)
	Derivatives:
	Change in accumulated gain on effective cash flow hedge derivatives			(2,246	)			859				(1,387	)
	Reclassification adjustment for loss realized in net income			(2	)			1				(1	)
	Total cash flow hedge derivatives			(2,248	)			860				(1,388	)
Total other comprehensive income		$	2,019			$	(772	)		$	1,247

Year Ended December 31, 2013:
Securities available for sale and transferred securities:
Unrealized holding losses arising during the period		$	(67,135	)		$	25,679			$	(41,456	)
Reclassification adjustment for net gains realized in net income			(485	)			186				(299	)
Net unrealized holding loss on securities transferred to held to maturity			(46,383	)			17,741				(28,642	)
Total securities available for sale and transferred securities			(114,003	)			43,606				(70,397	)
Pension and other postretirement benefit plans:
Net change in prior service costs			251				(96	)			155
Recognized net loss due to lump sum settlement			2,225				(851	)			1,374
Recognized net actuarial gain			32,742				(12,524	)			20,218
Total pension and other postretirement benefit plans			35,218				(13,471	)			21,747
Derivatives:
Change in accumulated gain on effective cash flow hedge derivatives			2,468				(944	)			1,524
Total other comprehensive loss		$	(76,317	)		$	29,191			$	(47,126	)

Year Ended December 31, 2012:
Securities available for sale:
Unrealized holding gains arising during the period		$	97			$	(37	)		$	60
Reclassification adjustment for net gains realized in net income			(1,059	)			405				(654	)
Total securities available for sale			(962	)			368				(594	)
Pension and other postretirement benefit plans:
Net change in prior service costs			52				(20	)			32
Recognized net actuarial gain			1,354				(518	)			836
Total pension and other postretirement benefit plans			1,406				(538	)			868
Total other comprehensive income		$	444			$	(170	)		$	274

The following table presents the changes in the balances of each component of accumulated other comprehensive (loss) income for the years ended December 31, 2014, 2013 and 2012 ($ in thousands). All amounts are presented net of tax.

		Securities				Defined				Cash Flow Hedge Derivatives				Total
		Available for Sale				Benefit
		and Transferred Securities				Pension Items
Balance at January 1, 2012		$	45,529			$	(42,408	)		$	-			$	3,121
Other comprehensive income before reclassification			60				868				-				928
Amounts reclassified from accumulated other comprehensive income			(654	)			-				-				(654	)
Net other comprehensive (loss) income			(594	)			868				-				274
Balance at December 31, 2012			44,935				(41,540	)			-				3,395
Other comprehensive loss before reclassification			(70,098	)			21,747				1,524				(46,827	)
Amounts reclassified from accumulated other comprehensive loss			(299	)			-				-				(299	)
Net other comprehensive (loss) income			(70,397	)			21,747				1,524				(47,126	)
Balance at December 31, 2013			(25,462	)			(19,793	)			1,524				(43,731	)
Other comprehensive income before reclassification			14,644				(11,824	)			(1,387	)			1,433
Amounts reclassified from accumulated other comprehensive loss			(185	)			-				(1	)			(186	)
Net other comprehensive income (loss)			14,459				(11,824	)			(1,388	)			1,247
Balance at December 31, 2014		$	(11,003	)		$	(31,617	)		$	136			$	(42,484	)

Fair_Value

Fair Value	12 Months Ended
Fair Value	Dec. 31, 2014
Fair Value [Abstract]
Fair Value	Note 19 – Fair Value

	Financial Instruments Measured at Fair Value

	The methodologies Trustmark uses in determining the fair values are based primarily on the use of independent, market-based data to reflect a value that would be reasonably expected upon exchange of the position in an orderly transaction between market participants at the measurement date. The predominant portion of assets that are stated at fair value are of a nature that can be valued using prices or inputs that are readily observable through a variety of independent data providers. The providers selected by Trustmark for fair valuation data are widely recognized and accepted vendors whose evaluations support the pricing functions of financial institutions, investment and mutual funds, and portfolio managers. Trustmark has documented and evaluated the pricing methodologies used by the vendors and maintains internal processes that regularly test valuations for anomalies.

	Trustmark utilizes an independent pricing service to advise it on the carrying value of the securities available for sale portfolio. As part of Trustmark’s procedures, the price provided from the service is evaluated for reasonableness given market changes. When a questionable price exists, Trustmark investigates further to determine if the price is valid. If needed, other market participants may be utilized to determine the correct fair value. Trustmark has also reviewed and confirmed its determinations in thorough discussions with the pricing source regarding their methods of price discovery.

	Mortgage loan commitments are valued based on the securities prices of similar collateral, term, rate and delivery for which the loan is eligible to deliver in place of the particular security. Trustmark acquires a broad array of mortgage security prices that are supplied by a market data vendor, which in turn accumulates prices from a broad list of securities dealers. Prices are processed through a mortgage pipeline management system that accumulates and segregates all loan commitment and forward-sale transactions according to the similarity of various characteristics (maturity, term, rate, and collateral). Prices are matched to those positions that are deemed to be an eligible substitute or offset (i.e., “deliverable”) for a corresponding security observed in the market place.

	Trustmark estimates fair value of MSR through the use of prevailing market participant assumptions and market participant valuation processes. This valuation is periodically tested and validated against other third-party firm valuations.

	Trustmark obtains the fair value of interest rate swaps from a third-party pricing service that uses an industry standard discounted cash flow methodology. In addition, credit valuation adjustments are incorporated in the fair values to account for potential nonperformance risk. In adjusting the fair value of its interest rate swap contracts for the effect of nonperformance risk, Trustmark has considered any applicable credit enhancements such as collateral postings, thresholds, mutual puts, and guarantees. In conjunction with the FASB’s fair value measurement guidance, Trustmark made an accounting policy election to measure the credit risk of these derivative financial instruments, which are subject to master netting agreements, on a net basis by counterparty portfolio.

	Trustmark has determined that the majority of the inputs used to value its interest rate swaps offered to qualified commercial borrowers fall within Level 2 of the fair value hierarchy, while the credit valuation adjustments associated with these derivatives utilize Level 3 inputs, such as estimates of current credit spreads. Trustmark has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its interest rate swaps and has determined that the credit valuation adjustment is not significant to the overall valuation of these derivatives. As a result, Trustmark classifies its interest rate swap valuations in Level 2 of the fair value hierarchy.

	Trustmark also utilizes exchange-traded derivative instruments such as Treasury note futures contracts and option contracts to achieve a fair value return that offsets the changes in fair value of MSR attributable to interest rates. Fair values of these derivative instruments are determined from quoted prices in active markets for identical assets therefore allowing them to be classified within Level 1 of the fair value hierarchy. In addition, Trustmark utilizes derivative instruments such as interest rate lock commitments in its mortgage banking area which lack observable inputs for valuation purposes resulting in their inclusion in Level 3 of the fair value hierarchy.

	At this time, Trustmark presents no fair values that are derived through internal modeling. Should positions requiring fair valuation arise that are not relevant to existing methodologies, Trustmark will make every reasonable effort to obtain market participant assumptions, or independent evaluation.

	Financial Assets and Liabilities

	The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of December 31, 2014 and 2013, segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value ($ in thousands). There were no transfers between fair value levels for the years ended December 31, 2014 and 2013.

			31-Dec-14
			Total				Level 1				Level 2			Level 3
	U.S. Treasury securities		$	100			$	-			$	100		$	-
	U.S. Government agency obligations			112,474				-				112,474			-
	Obligations of states and political subdivisions			162,258				-				162,258			-
	Mortgage-backed securities			2,068,035				-				2,068,035			-
	Asset-backed securities and structured financial products			31,700				-				31,700			-
	Securities available for sale			2,374,567				-				2,374,567			-
	Loans held for sale			132,196				-				132,196			-
	Mortgage servicing rights			64,358				-				-			64,358
	Other assets - derivatives			5,527				1,181				3,047			1,299
	Other liabilities - derivatives			4,338				490				3,848			-

			31-Dec-13
			Total				Level 1				Level 2			Level 3
	U.S. Treasury securities		$	502			$	-			$	502		$	-
	U.S. Government agency obligations			169,472				-				169,472			-
	Obligations of states and political subdivisions			171,738				-				171,738			-
	Mortgage-backed securities			1,788,505				-				1,788,505			-
	Asset-backed securities and structured financial products			63,937				-				63,937			-
	Securities available for sale			2,194,154				-				2,194,154			-
	Loans held for sale			149,169				-				149,169			-
	Mortgage servicing rights			67,834				-				-			67,834
	Other assets - derivatives			4,994				(2,579	)			7,447			126
	Other liabilities - derivatives			3,298				581				2,717			-

	The changes in Level 3 assets measured at fair value on a recurring basis for the years ended December 31, 2014 and 2013 are summarized as follows ($ in thousands):

			MSR				Other Assets - Derivatives
	Balance, January 1, 2014		$	67,834			$	126
	Total net (losses) gains included in Mortgage banking, net (1)			(15,769	)			4,554
	Additions			12,293				-
	Sales			-				(3,381	)
	Balance, December 31, 2014		$	64,358			$	1,299

	The amount of total (losses) gains for the period included in		$	(7,202	)		$	587
	earnings that are attributable to the change in unrealized
	gains or losses still held at December 31, 2014

	Balance, January 1, 2013		$	47,341			$	2,284
Total net gains included in Mortgage banking, net (1)			2,012				7,754
Additions			18,481				-
Sales			-				(9,912	)
Balance, December 31, 2013		$	67,834			$	126

The amount of total gains for the period included in		$	11,818			$	735
earnings that are attributable to the change in unrealized
gains or losses still held at December 31, 2013

-1	Total net (losses) gains included in Mortgage banking, net relating to MSR includes changes in fair value due to market changes and due to runoff.

Trustmark may be required, from time to time, to measure certain assets at fair value on a nonrecurring basis in accordance with GAAP. Assets at December 31, 2014, which have been measured at fair value on a nonrecurring basis, include impaired LHFI. Loans for which it is probable Trustmark will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement are considered impaired. Impaired LHFI have been determined to be collateral dependent and assessed using a fair value approach. Specific allowances for impaired LHFI are based on comparisons of the recorded carrying values of the loans to the present value of the estimated cash flows of these loans at each loan’s original effective interest rate, the fair value of the collateral or the observable market prices of the loans. Fair value estimates begin with appraised values based on the current market value or as-is value of the property being appraised, normally from recently received and reviewed appraisals. Appraisals are obtained from state-certified appraisers and are based on certain assumptions, which may include construction or development status and the highest and best use of the property. These appraisals are reviewed by Trustmark’s Appraisal Review Department to ensure they are acceptable. Appraised values are adjusted down for costs associated with asset disposal. At December 31, 2014, Trustmark had outstanding balances of $47.1 million in impaired LHFI that were specifically identified for evaluation and written down to fair value of the underlying collateral less cost to sell based on the fair value of the collateral or other unobservable input compared to $31.6 million at December 31, 2013. These specifically evaluated impaired LHFI are classified as Level 3 in the fair value hierarchy. Impaired LHFI are periodically reviewed and evaluated for additional impairment and adjusted accordingly based on the same factors identified above.

Please refer to Note 2 – Business Combinations, for financial assets and liabilities acquired, which were measured at fair value on a nonrecurring basis in accordance with GAAP.

Nonfinancial Assets and Liabilities

Certain nonfinancial assets measured at fair value on a nonrecurring basis include foreclosed assets (upon initial recognition or subsequent impairment), nonfinancial assets and nonfinancial liabilities measured at fair value in the second step of a goodwill impairment test, and intangible assets and other nonfinancial long-lived assets measured at fair value for impairment assessment.

Other real estate, excluding covered other real estate, includes assets that have been acquired in satisfaction of debt through foreclosure and is recorded at the lower of cost or estimated fair value less the estimated cost of disposition. Fair value is based on independent appraisals and other relevant factors. In the determination of fair value subsequent to foreclosure, Management also considers other factors or recent developments, such as changes in market conditions from the time of valuation and anticipated sales values considering plans for disposition, which could result in an adjustment to lower the collateral value estimates indicated in the appraisals. At December 31, 2014, Trustmark's geographic other real estate distribution was concentrated primarily in its five key market regions: Alabama, Florida, Mississippi, Tennessee and Texas. The ultimate recovery of a substantial portion of the carrying amount of other real estate, excluding covered other real estate, is susceptible to changes in market conditions in these areas. Periodic revaluations are classified as Level 3 in the fair value hierarchy since assumptions are used that may not be observable in the market.

Certain foreclosed assets, upon initial recognition, are remeasured and reported at fair value through a charge-off to the allowance for loan losses based upon the fair value of the foreclosed asset. The fair value of a foreclosed asset, upon initial recognition, is estimated using Level 3 inputs based on adjusted observable market data. Foreclosed assets measured at fair value upon initial recognition totaled $37.4 million (utilizing Level 3 valuation inputs) during the year ended December 31, 2014 compared with $80.3 million for the same period in 2013. Foreclosed assets measured at fair value upon initial recognition for the year ended December 31, 2013, included $40.1 million of other real estate acquired from BancTrust. In connection with the measurement and initial recognition of the foregoing foreclosed assets, Trustmark recognized charge-offs of the allowance for loan losses totaling $13.9 million and $11.4 million for 2014 and 2013, respectively. Other than foreclosed assets measured at fair value upon initial recognition, $48.7 million of foreclosed assets were remeasured during 2014 requiring write-downs of $7.7 million to reach their current fair values compared to $53.8 million of foreclosed assets were remeasured during 2013, requiring write-downs of $6.4 million.

Fair Value of Financial Instruments

The carrying amounts and estimated fair values of financial instruments at December 31, 2014 and 2013, were as follows ($ in thousands):

		2014								2013
		Carrying				Estimated				Carrying			Estimated
		Value				Fair Value				Value			Fair Value
Financial Assets:
Level 2 Inputs:
Cash and short-term investments		$	317,858			$	317,858			$	353,014		$	353,014
Securities held to maturity			1,170,685				1,182,846				1,168,728			1,150,833
Level 3 Inputs:
Net LHFI			6,379,853				6,453,618				5,732,433			5,787,408
Net acquired loans			537,350				537,350				794,570			794,570
FDIC indemnification asset			6,997				6,997				14,347			14,347

Financial Liabilities:
Level 2 Inputs:
Deposits			9,698,358				9,702,864				9,859,902			9,866,118
Short-term liabilities			868,620				868,620				317,972			317,972
Long-term FHLB advances			1,253				1,263				8,458			8,474
Subordinated notes			49,936				53,504				49,904			53,387
Junior subordinated debt securities			61,856				46,392				61,856			40,206

FASB ASC Topic 825 requires disclosure of the fair value of financial assets and financial liabilities, including those financial assets and financial liabilities that are not measured and reported at fair value on a recurring basis or non-recurring basis. The methodology and significant assumptions used in estimating the fair values presented above are as follows:

In cases where quoted market prices are not available, fair values are generally based on estimates using present value techniques. Trustmark’s premise in present value techniques is to represent the fair values on a basis of replacement value of the existing instrument given observed market rates on the measurement date. These techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. In that regard, the derived fair value estimates for those assets or liabilities cannot be necessarily substantiated by comparison to independent markets and, in many cases, may not be realizable in immediate settlement of the instruments. The estimated fair value of financial instruments with immediate and shorter-term maturities (generally 90 days or less) is assumed to be the same as the recorded book value. All nonfinancial instruments, by definition, have been excluded from these disclosure requirements. Accordingly, the aggregate fair value amounts presented do not represent the underlying value of Trustmark.

Cash and Short-Term Investments

The carrying amounts for cash and due from banks and short-term investments (federal funds sold and securities purchased under reverse repurchase agreements) approximate fair values due to their immediate and shorter-term maturities.

Securities Held to Maturity

Estimated fair values for securities held to maturity are based on quoted market prices where available. If quoted market prices are not available, estimated fair values are based on quoted market prices of comparable instruments.

Net LHFI

The fair values of net LHFI are estimated for portfolios of loans with similar financial characteristics. For variable rate LHFI that reprice frequently with no significant change in credit risk, fair values are based on carrying values. The fair values of certain mortgage LHFI, such as 1-4 family residential properties, are based on quoted market prices of similar loans sold in conjunction with securitization transactions, adjusted for differences in loan characteristics. The fair values of other types of LHFI are estimated by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities. The processes for estimating the fair value of net LHFI described above do not represent an exit price under FASB ASC Topic 820 and such an exit price could potentially produce a different fair value estimate at December 31, 2014 and 2013.

Net Acquired Loans

The fair value of net acquired loans is based on estimates of future loan cash flows and appropriate discount rates, which incorporate Trustmark’s assumptions about market funding cost and liquidity premium. The estimates of future loan cash flows are determined using Trustmark’s assumptions concerning the amount and timing of principal and interest payments, prepayments and credit losses.

FDIC Indemnification Asset

The fair value of the FDIC indemnification asset is estimated by discounting estimated future cash flows based on market rates observed at the time of acquisition.

Deposits

The fair values of deposits with no stated maturity, such as noninterest-bearing demand deposits, NOW accounts, MMDA products and savings accounts are, by definition, equal to the amount payable on demand, which is the carrying value. Fair values for certificates of deposit are based on the discounted value of contractual cash flows. The discount rate is estimated using the rates currently offered for deposits with similar remaining maturities.

Short-Term Liabilities

The carrying amounts for federal funds purchased, securities sold under repurchase agreements and other borrowings, including short-term FHLB advances, approximate their fair values.

Long-Term FHLB Advances

FHLB advances were valued by projecting expected cash flows into the future based on each advance’s contracted rate and then determining the present value of those expected cash flows using current rates for advances with similar maturities.

Subordinated Notes

The fair value of the subordinated notes equals quoted market prices, if available. If a quoted market price is not available, the fair value is estimated using quoted market prices for similar subordinated notes.

Junior Subordinated Debt Securities

The fair value of the junior subordinated debt securities equals quoted market prices, if available. If a quoted market price is not available, the fair value is estimated using quoted market prices for similar junior subordinated debt securities.

Fair Value Option

Trustmark has elected to account for its mortgage LHFS purchased or originated on or after October 1, 2014 under the fair value option with interest income on these LHFS reported in interest and fees-LHFI and LHFS. The fair value of the mortgage LHFS is determined using quoted prices for a similar asset, adjusted for specific attributes of that loan. The mortgage LHFS are actively managed and monitored and certain market risks of the loans may be mitigated through the use of derivatives. These derivative instruments are carried at fair value with changes in fair value recorded in noninterest income in mortgage banking, net. The changes in the fair value of the LHFS are largely offset by changes in the fair value of the derivative instruments. For the year ended December 31, 2014, $2.0 million was recorded in noninterest income in mortgage banking, net for changes in the fair value of the LHFS accounted for under the fair value option. Election of the fair value option allows Trustmark to reduce the accounting volatility that would otherwise result from the asymmetry created by accounting for the financial instruments at the lower of cost or fair value and the derivatives at fair value. The fair value option election does not apply to the GNMA optional repurchase loans.

The following table provides information about the fair value and the contractual principal outstanding of the LHFS accounted for under the fair value options as of December 31, 2014 ($ in thousands):

		31-Dec-14
Fair value of LHFS		$	91,182
LHFS contractual principal outstanding			88,106
Fair value less unpaid principal		$	3,076

Derivative_Financial_Instrumen

Derivative Financial Instruments	12 Months Ended
Derivative Financial Instruments	Dec. 31, 2014
Derivative Financial Instruments [Abstract]
Derivative Financial Instruments	Note 20 – Derivative Financial Instruments

	Derivatives Designated as Hedging Instruments

	As part of Trustmark’s risk management strategy in the mortgage banking area, derivative instruments such as forward sales contracts are utilized. Trustmark’s obligations under forward sales contracts consist of commitments to deliver mortgage loans, originated and/or purchased, in the secondary market at a future date. On October 1, 2014, Trustmark elected to account for its mortgage LHFS under the fair value option. As a result of this election, the forward sales contracts no longer qualify as derivative instruments designated as fair value hedges under FASB ASC Topic 815. Prior to this election, the ineffective portion of changes in the fair value of the forward sales contracts and changes in the fair value of the loans designated as loans held for sale was recorded in noninterest income in mortgage banking, net. Subsequent to the election, changes in the fair value of these derivative instruments are recorded in noninterest income in mortgage banking, net and are offset by changes in the fair value of LHFS. Trustmark’s off-balance sheet obligations under these derivative instruments totaled $142.0 million at December 31, 2014, with a negative valuation adjustment of $1.0 million, compared to $155.8 million, with a positive valuation adjustment of $1.9 million as of December 31, 2013.

	On April 4, 2013, Trustmark entered into a forward interest rate swap contract on junior subordinated debentures with a total notional amount of $60.0 million. The interest rate swap contract was designated as a derivative instrument in a cash flow hedge under FASB ASC Topic 815, with the objective of protecting the quarterly interest payments on Trustmark’s $60.0 million of junior subordinated debentures issued to Trustmark Preferred Capital Trust I throughout the five-year period beginning December 31, 2014 and ending December 31, 2019 from the risk of variability of those payments resulting from changes in the three-month LIBOR interest rate. Under the swap, which became effective on December 31, 2014, Trustmark will pay a fixed interest rate of 1.66% and receive a variable interest rate based on three-month LIBOR on a total notional amount of $60.0 million, with quarterly net settlements.

	No ineffectiveness related to the interest rate swap designated as a cash flow hedge was recognized in the consolidated statements of income for the year ended December 31, 2014. The accumulated net after-tax gain related to the effective cash flow hedge included in accumulated other comprehensive loss totaled $136 thousand at December 31, 2014 compared to $1.5 million at December 31, 2013. Amounts reported in accumulated other comprehensive loss related to this derivative are reclassified to other interest expense as interest payments are made on Trustmark’s variable rate junior subordinated debentures. During the next twelve months, Trustmark estimates that $747 thousand will be reclassified as an increase to other interest expense.

	Derivatives not Designated as Hedging Instruments

	Trustmark utilizes a portfolio of exchange-traded derivative instruments, such as Treasury note futures contracts and option contracts, to achieve a fair value return that economically hedges changes in the fair value of MSR attributable to interest rates. These transactions are considered freestanding derivatives that do not otherwise qualify for hedge accounting. Changes in the fair value of these exchange-traded derivative instruments are recorded in noninterest income in mortgage banking, net and are offset by changes in the fair value of MSR. The impact of this strategy resulted in a net positive ineffectiveness of $3.1 million and $3.7 million for the years ended December 31, 2014 and 2013, respectively.

	Trustmark also utilizes derivative instruments such as interest rate lock commitments in its mortgage banking area. Interest rate lock commitments are residential mortgage loan commitments with customers, which guarantee a specified interest rate for a specified time period. Changes in the fair value of these derivative instruments are recorded in noninterest income in mortgage banking, net and are offset by the changes in the fair value of forward sales contracts. Trustmark’s off-balance sheet obligations under these derivative instruments totaled $88.4 million at December 31, 2014, with a positive valuation adjustment of $1.3 million, compared to $58.5 million, with a positive valuation adjustment of $126 thousand as of December 31, 2013.

	Trustmark offers certain derivatives products directly to qualified commercial lending clients seeking to manage their interest rate risk. Trustmark economically hedges interest rate swap transactions executed with commercial lending clients by entering into offsetting interest rate swap transactions with institutional derivatives market participants. Derivative transactions executed as part of this program are not designated as qualifying hedging relationships and are, therefore, carried at fair value with the change in fair value recorded in noninterest income in bank card and other fees. Because these derivatives have mirror-image contractual terms, in addition to collateral provisions which mitigate the impact of non-performance risk, the changes in fair value are expected to substantially offset. As of December 31, 2014, Trustmark had interest rate swaps with an aggregate notional amount of $349.4 million related to this program, compared to $355.9 million as of December 31, 2013.

	Credit-risk-related Contingent Features

	Trustmark has agreements with its financial institution counterparties that contain provisions where if Trustmark defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then Trustmark could also be declared in default on its derivative obligations.

	As of December 31, 2014, the termination value of interest rate swaps in a liability position, which includes accrued interest but excludes any adjustment for nonperformance risk, related to these agreements was $1.9 million compared to $508 thousand as of December 31, 2013. As of December 31, 2014, Trustmark had posted collateral with a market value of $1.0 million against its obligations because of negotiated thresholds and minimum transfer amounts under these agreements. If Trustmark had breached any of these triggering provisions at December 31, 2014, it could have been required to settle its obligations under the agreements at the termination value.

	Credit risk participation agreements arise when Trustmark contracts with other financial institutions, as a guarantor or beneficiary, to share credit risk associated with certain interest rate swaps. These agreements provide for reimbursement of losses resulting from a third party default on the underlying swap. As of December 31, 2014 and 2013, Trustmark had entered into three risk participation agreements as a beneficiary with an aggregate notional amount of $19.1 million and $19.7 million, respectively. As of December 31, 2014, Trustmark had entered into one risk participation agreement as a guarantor with an aggregate notional amount of $6.2 million, compared to none at December 31, 2013. The fair values of these risk participation agreements were immaterial at December 31, 2014 and 2013.

	Tabular Disclosures

	The following tables disclose the fair value of derivative instruments in Trustmark’s balance sheets as of December 31, 2014 and 2013 as well as the effect of these derivative instruments on Trustmark’s results of operations for the years ended December 31, 2014, 2013 and 2012 ($ in thousands):

			31-Dec-14				31-Dec-13
	Derivatives in hedging relationships
	Interest rate contracts:
	Interest rate swaps included in other assets		$	221			$	2,469
	Forward contracts included in other liabilities (1)			-				(1,911	)

	Derivatives not designated as hedging instruments
	Interest rate contracts:
	Futures contracts included in other assets		$	928			$	(2,662	)
	Exchange traded purchased options included in other assets			253				83
	OTC written options (rate locks) included in other assets			1,299				126
	Interest rate swaps included in other assets			2,804				4,962
	Credit risk participation agreements included in other assets			22				16
	Forward contracts included in other liabilities (1)			1,014				-
	Exchange traded written options included in other liabilities			490				581
	Interest rate swaps included in other liabilities			2,813				4,628
	Credit risk participation agreements included in other liabilities			21				-

	-1	At December 31, 2014, forward contracts were no longer designated as hedging.

			Years ended December 31,
			2014				2013				2012
	Derivatives in hedging relationships
	Amount of loss reclassified from accumulated other		$	(2	)		$	-			$	-
	comprehensive (loss) income and recognized in other interest expense		$	(2	)		$	-			$	-
	Amount of (loss) gain recognized in mortgage banking, net			(2,534	)			2,649				1,479

	Derivatives not designated as hedging instruments
	Amount of gain (loss) recognized in mortgage banking, net		$	11,038			$	(10,459	)		$	7,585
	Amount of (loss) gain recognized in bankcard and other fees			(223	)			290				(82	)

	The following table discloses the amount included in other comprehensive income (loss) for derivative instruments designated as cash flow hedges for the years ended December 31, 2014, 2013 and 2012 ($ in thousands):

			Years Ended December 31,
		2014				2013				2012
Derivatives in cash flow hedging relationship
Amount of (loss) gain recognized in other comprehensive income (loss)		$	(1,387	)		$	1,524			$	-

Certain financial instruments, including resell and repurchase agreements, securities lending arrangements and derivatives, may be eligible for offset in the consolidated balance sheet and/or subject to master netting arrangements or similar agreements. Information about financial instruments that are eligible for offset in the consolidated balance sheets as of December 31, 2014 and 2013 is presented in the following tables ($ in thousands):

Offsetting of Derivative Assets


As of December 31, 2014

														Gross Amounts Not Offset in the Statement of Financial Position
		Gross				Gross Amounts				Net Amounts of				Financial Instruments			Cash Collateral Received			Net Amount
		Amounts of				Offset in the				Assets presented in
		Recognized				Statement of				the Statement of
		Assets				Financial Position				Financial Position
Derivatives		$	3,025			$	-			$	3,025			$	(347	)	$	-		$	2,678

Offsetting of Derivative Liabilities


As of December 31, 2014

														Gross Amounts Not Offset in the Statement of Financial Position
		Gross Amounts of Recognized Liabilities				Gross Amounts				Net Amounts of				Financial Instruments			Cash Collateral			Net Amount
						Offset in the				Liabilities presented							Posted
						Statement of				in the Statement of
						Financial Position				Financial Position
Derivatives		$	2,813			$	-			$	2,813			$	(347	)	$	-		$	2,466

Offsetting of Derivative Assets


As of December 31, 2013

														Gross Amounts Not Offset in the Statement of Financial Position
		Gross Amounts of Recognized Assets				Gross Amounts				Net Amounts of				Financial Instruments			Cash Collateral			Net Amount
						Offset in the				Assets presented in							Received
						Statement of				the Statement of
						Financial Position				Financial Position
Derivatives		$	7,431			$	-			$	7,431			$	(967	)	$	(1,920	)	$	4,544

Offsetting of Derivative Liabilities


As of December 31, 2013

														Gross Amounts Not Offset in the Statement of Financial Position
		Gross Amounts of Recognized Liabilities				Gross Amounts				Net Amounts of				Financial Instruments			Cash Collateral			Net Amount
						Offset in the				Liabilities presented							Posted
						Statement of				in the Statement of
						Financial Position				Financial Position
Derivatives		$	4,628			$	-			$	4,628			$	(967	)	$	-		$	3,661

Segment_Information

Segment Information	12 Months Ended
Segment Information	Dec. 31, 2014
Segment Information [Abstract]
Segment Information	Note 21 – Segment Information

	Trustmark’s management reporting structure includes three segments: General Banking, Wealth Management and Insurance. General Banking is primarily responsible for all traditional banking products and services, including loans and deposits. General Banking also consists of internal operations such as Human Resources, Executive Administration, Treasury, Funds Management, Public Affairs and Corporate Finance. Wealth Management provides customized solutions for affluent customers by integrating financial services with traditional banking products and services such as money management, full-service brokerage, financial planning, personal and institutional trust and retirement services. Through Fisher Brown Bottrell Insurance, Inc. (FBBI), a wholly owned subsidiary of TNB, Trustmark’s Insurance Division provides a full range of retail insurance products including commercial risk management products, bonding, group benefits and personal lines coverage. During the second quarter of 2014, Trustmark revised the composition of its operating segments by moving the Private Banking group from the Wealth Management Division to the General Banking Division as the result of a change in supervision of this group for segment reporting purposes. Prior period amounts presented below include reclassifications to conform to the current period presentation.

	The accounting policies of each reportable segment are the same as those of Trustmark except for its internal allocations. Noninterest expenses for back-office operations support are allocated to segments based on estimated uses of those services. Trustmark measures the net interest income of its business segments with a process that assigns cost of funds or earnings credit on a matched-term basis. This process, called "funds transfer pricing", charges an appropriate cost of funds to assets held by a business unit, or credits the business unit for potential earnings for carrying liabilities. The net of these charges and credits flows through to the General Banking segment, which contains the management team responsible for determining the bank's funding and interest rate risk strategies.

	The following table discloses financial information by reportable segment for the years ended December 31, 2014, 2013 and 2012 ($ in thousands):

		Years Ended December 31,
		2014		2013			2012
	General Banking
	Net interest income	$	404,214	$	387,586		$	340,130
	Provision for loan losses, net		7,382		(7,382	)		12,294
	Noninterest income		107,457		113,571			122,565
	Noninterest expense		355,693		367,031			302,234
	Income before income taxes		148,596		141,508			148,167
	Income taxes		33,726		32,499			38,079
	General banking net income	$	114,870	$	109,009		$	110,088

	Selected Financial Information
	Average assets	$	11,958,078	$	11,463,789		$	9,737,230
	Depreciation and amortization	$	35,038	$	35,971		$	27,886

	Wealth Management
	Net interest income	$	851	$	582		$	559
	Noninterest income		32,209		29,446			24,421
	Noninterest expense		26,733		24,713			20,916
	Income before income taxes		6,327		5,315			4,064
	Income taxes		2,105		1,754			1,354
	Wealth Management net income	$	4,222	$	3,561		$	2,710

	Selected Financial Information
	Average assets	$	1,504	$	304		$	261
	Depreciation and amortization	$	190	$	157		$	164

	Insurance
	Net interest income	$	271	$	319		$	301
	Noninterest income		33,476		30,842			28,203
	Noninterest expense		26,579		23,987			21,352
	Income before income taxes		7,168		7,174			7,152
	Income taxes		2,698		2,684			2,667
	Insurance net income	$	4,470	$	4,490		$	4,485

	Selected Financial Information
	Average assets	$	68,448	$	66,876		$	65,560
	Depreciation and amortization	$	844	$	1,025		$	1,225

	Consolidated
	Net interest income	$	405,336	$	388,487		$	340,990
	Provision for loan losses, net		7,382		(7,382	)		12,294
	Noninterest income		173,142		173,859			175,189
	Noninterest expense		409,005		415,731			344,502
	Income before income taxes		162,091		153,997			159,383
	Income taxes		38,529		36,937			42,100
	Consolidated net income	$	123,562	$	117,060		$	117,283

	Selected Financial Information
	Average assets	$	12,028,030	$	11,530,969		$	9,803,051
	Depreciation and amortization	$	36,072	$	37,153		$	29,275

Parent_Company_Only_Financial_

Parent Company Only Financial Information	12 Months Ended
Parent Company Only Financial Information	Dec. 31, 2014
Parent Company Only Financial Information [Abstract]
Parent Company Only Financial Information	Note 22 – Parent Company Only Financial Information
	($ in thousands)

	Condensed Balance Sheets	December 31,
	Assets:	2014			2013
	Investment in banks	$	1,463,676		$	1,394,250
	Other assets		18,663			25,314
	Total Assets	$	1,482,339		$	1,419,564

	Liabilities and Shareholders' Equity:
	Accrued expense	$	543		$	2,755
	Junior subordinated debt securities		61,856			61,856
	Shareholders' equity		1,419,940			1,354,953
	Total Liabilities and Shareholders' Equity	$	1,482,339		$	1,419,564

	Condensed Statements of Income	Years Ended December 31,
	Revenue:	2014			2013			2012
	Dividends received from banks	$	64,351		$	64,155		$	72,216
	Earnings of subsidiaries over distributions		60,783			54,195			46,220
	Other income		55			64			59
	Total Revenue		125,189			118,414			118,495
	Expense:
	Other expense		1,627			1,354			1,212
	Total Expense		1,627			1,354			1,212
	Net Income	$	123,562		$	117,060		$	117,283

	Condensed Statements of Cash Flows	Years Ended December 31,
	Operating Activities:	2014			2013			2012
	Net income	$	123,562		$	117,060		$	117,283
	Adjustments to reconcile net income to net cash provided by operating activities:
	Increase in investment in subsidiaries		(60,783	)		(54,195	)		(46,220	)
	Other		(2,158	)		962			(376	)
	Net cash provided by operating activities		60,621			63,827			70,687

	Investing Activities:
	Payment for investments in subsidiaries		-			(73,263	)		(10,003	)
	Repayment for investments in subsidiaries		-			106,000			-
	Net cash provided by (used in) investing activities		-			32,737			(10,003	)

	Financing Activities:
	Repayments of advances from subsidiaries		-			(33,000	)		-
	Cash dividends paid on common stock		(62,474	)		(62,276	)		(59,961	)
	Other common stock transactions, net		(1,502	)		2,832			(1,237	)
	Net cash used in financing activities		(63,976	)		(92,444	)		(61,198	)
	(Decrease) increase in cash and cash equivalents		(3,355	)		4,120			(514	)
	Cash and cash equivalents at beginning of year		21,776			17,656			18,170
	Cash and cash equivalents at end of year	$	18,421		$	21,776		$	17,656

	Trustmark (parent company only) paid income taxes of approximately $13.7 million in 2014, $14.5 million in 2013 and $57.8 million in 2012. Trustmark paid no interest for the years 2014, 2013 or 2012.

Significant_Accounting_Policie1

Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2014

Significant Accounting Policies [Abstract]

Business

Trustmark Corporation (Trustmark) is a bank holding company headquartered in Jackson, Mississippi. Through its subsidiaries, Trustmark operates as a financial services organization providing banking and financial solutions to corporate institutions and individual customers through 205 offices in Alabama, Florida, Mississippi, Tennessee and Texas.

Basis of Financial Statement Presentation

The consolidated financial statements include the accounts of Trustmark and all other entities in which Trustmark has a controlling financial interest. All significant intercompany accounts and transactions have been eliminated in consolidation. Certain reclassifications have been made to prior period amounts to conform to the current period presentation.

The consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (GAAP). The preparation of financial statements in conformity with these accounting principles requires Management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and income and expense during the reporting period and the related disclosures. Although Management’s estimates contemplate current conditions and how they are expected to change in the future, it is reasonably possible that in 2015 actual conditions could vary from those anticipated, which could affect Trustmark’s results of operations and financial condition. The allowance for loan losses, the amount and timing of expected cash flows from acquired loans and the Federal Deposit Insurance Corporation (FDIC) indemnification asset, the valuation of other real estate, the fair value of mortgage servicing rights, the valuation of goodwill and other identifiable intangibles, the status of contingencies and the fair values of financial instruments are particularly subject to change. Actual results could differ from those estimates.

Securities

Securities are classified as either held to maturity, available for sale or trading. Securities are classified as held to maturity and carried at amortized cost when Management has the positive intent and the ability to hold them until maturity. Securities to be held for indefinite periods of time are classified as available for sale and carried at fair value, with the unrealized holding gains and losses reported as a component of other comprehensive income (loss), net of tax. Securities available for sale are used as part of Trustmark’s interest rate risk management strategy and may be sold in response to changes in interest rates, changes in prepayment rates and other factors. Management determines the appropriate classification of securities at the time of purchase. Trustmark currently has no securities classified as trading.

The amortized cost of debt securities classified as securities held to maturity or securities available for sale is adjusted for amortization of premiums and accretion of discounts to maturity over the estimated life of the security using the interest method. Such amortization or accretion is included in interest on securities. Realized gains and losses are determined using the specific identification method and are included in noninterest income as securities gains, net.

Securities transferred from the available for sale category to the held to maturity category are recorded at fair value at the date of transfer. Unrealized holding gains or losses associated with the transfer of securities from available for sale to held to maturity are included in the balance of accumulated other comprehensive loss in the consolidated balance sheets. These unrealized holding gains or losses are amortized over the remaining life of the security as a yield adjustment in a manner consistent with the amortization or accretion of the original purchase premium or discount on the associated security.

Trustmark reviews securities for impairment quarterly. Declines in the fair value of held to maturity and available for sale securities below their cost that are deemed to be other than temporary are reflected in earnings as realized losses to the extent the impairment is related to credit losses. The amount of the impairment related to other factors is recognized as a component of other comprehensive income (loss), net of tax. In estimating other-than-temporary impairment losses, Management considers, among other things, the length of time and the extent to which the fair value has been less than cost, the financial condition and near-term prospects of the issuer and Trustmark’s intent and ability to hold the security for a period of time sufficient to allow for any anticipated recovery in fair value.

Loans Held for Sale (LHFS)

Primarily, all mortgage loans purchased from wholesale customers or originated in Trustmark’s General Banking Division are considered to be held for sale. In certain circumstances, Trustmark will retain a mortgage loan in its portfolio based on banking relationships or certain investment strategies. Mortgage LHFS in the secondary market that are hedged using fair value hedges are carried at estimated fair value on an aggregate basis. Substantially, all mortgage LHFS are hedged. These loans are primarily first-lien mortgage loans originated or purchased by Trustmark. Deferred loan fees and costs are reflected in the basis of LHFS and, as such, impact the resulting gain or loss when loans are sold. Adjustments to reflect fair value and realized gains and losses upon ultimate sale of the loans are recorded in noninterest income in mortgage banking, net.

Government National Mortgage Association (GNMA) optional repurchase programs allow financial institutions to buy back individual delinquent mortgage loans that meet certain criteria from the securitized loan pool for which the institution provides servicing. At the servicer’s option and without GNMA’s prior authorization, the servicer may repurchase such a delinquent loan for an amount equal to 100 percent of the remaining principal balance of the loan. Under Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic 860, “Transfers and Servicing,” this buy-back option is considered a conditional option until the delinquency criteria are met, at which time the option becomes unconditional. When Trustmark is deemed to have regained effective control over these loans under the unconditional buy-back option, the loans can no longer be reported as sold and must be brought back onto the balance sheet as LHFS, regardless of whether Trustmark intends to exercise the buy-back option. These loans are reported as LHFS with the offsetting liability being reported as short-term borrowings.

During the quarter ended December 31, 2014, Trustmark elected to measure all mortgage loans purchased or originated which are held for sale under the fair value option permitted by FASB ASC Topic 825, “Financial Instruments.” The fair value option election applies to mortgage LHFS purchased or originated by Trustmark on or after October 1, 2014. The fair value option election does not apply to GNMA optional repurchase loans. Trustmark elected the fair value option for its mortgage LHFS in order to report these loans at fair value without having to apply hedge accounting provisions.

As a result of this election, Trustmark unrealized gains and losses resulting from changes in the fair value of the mortgage LHFS are reported as noninterest income in mortgage banking, net. Prior to this election, Trustmark deferred the upfront loan fees and costs related to the mortgage LHFS. In general, the mortgage LHFS are only retained on Trustmark’s balance sheet for 30 to 45 days before they are pooled and sold in the secondary market. The difference between deferring these loan fees and costs until the loans are sold and recognizing them in earnings as incurred as required by FASB ASC Topic 825-10 is considered immaterial. Therefore, Trustmark has chosen to continue to defer the upfront loan fees and costs. There was no impact to Trustmark’s consolidated financial statements on the date of the election.

Loans Held for Investment (LHFI)

LHFI are stated at the amount of unpaid principal, adjusted for the net amount of direct costs and nonrefundable loan fees associated with lending. The net amount of nonrefundable loan origination fees and direct costs associated with the lending process, including commitment fees, is deferred and accreted to interest income over the lives of the loans using a method that approximates the interest method. Interest on LHFI is accrued and recorded as interest income based on the outstanding principal balance.

Trustmark has established acceptable ranges or limits for specific types of credit. Within these categories, the overall risk of individual credits is controlled through maximum advance rates and repayment periods and minimum debt service coverage ratios as defined in policy as well as continuous monitoring of these measures throughout the life of the loan. These policy directives are periodically reviewed to ensure that they continue to reflect underwriting considerations deemed essential to maintaining a sound loan portfolio. It is recognized that not all extensions of credit will fully comply with policy limitations. Accordingly, such exceptions to loan policy must be justified by other mitigating features of the loan and must receive proper approval as designated in the loan policy.

Past due LHFI are loans contractually past due 30 days or more as to principal or interest payments. A LHFI is classified as nonaccrual, and the accrual of interest on such loan is discontinued, when the contractual payment of principal or interest becomes 90 days past due on commercial credits and 120 days past due on non-business purpose credits. In addition, a credit may be placed on nonaccrual at any other time Management has serious doubts about further collectibility of principal or interest according to the contractual terms, even though the loan is currently performing. A LHFI may remain in accrual status if it is in the process of collection and well secured. When a LHFI is placed in nonaccrual status, unpaid interest is reversed against interest income. Interest received on nonaccrual LHFI is applied against principal. LHFI are restored to accrual status when the obligation is brought current or has performed in accordance with the contractual terms for a reasonable period of time, and the ultimate collectibility of the total contractual principal and interest is no longer in doubt.

A LHFI is considered impaired when, based on current information and events, it is probable that Trustmark will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. If a LHFI is impaired, a specific valuation allowance is allocated, if necessary, so that the loan is reported net, at the present value of estimated future cash flows using the loan’s existing rate or at the fair value of collateral if repayment is expected solely from the collateral. All classes of commercial LHFI of $500,000 or more, which are classified as nonaccrual, are identified for impairment analysis (specifically evaluated impaired LHFI). Consistent with the policy for nonaccrual LHFI, interest payments on impaired LHFI are applied to principal. Impaired LHFI, or portions thereof, are charged off when deemed uncollectible.

Commercial purpose LHFI are charged off when a determination is made that the loan is uncollectible and continuance as a bankable asset is not warranted. Consumer LHFI secured by 1-4 family residential real estate are generally charged off or written down to the fair value of the collateral less cost to sell at no later than 180 days of delinquency. Non-real estate consumer purpose LHFI, including both secured and unsecured loans, are generally charged off by 120 days of delinquency. Consumer revolving lines of credit and credit card debt are generally charged off on or prior to 180 days of delinquency.

Allowance for Loan Losses, LHFI

The allowance for loan losses, LHFI is established through provisions for estimated loan losses charged against net income. The allowance account is maintained at a level which is believed to be adequate by Management based on estimated probable losses within the LHFI portfolio. Evaluations of the portfolio and individual credits are inherently subjective, as they require estimates, assumptions and judgments as to the facts and circumstances of particular situations. Some of the factors considered, such as amounts and timing of future cash flows expected to be received, may be susceptible to significant change.

Trustmark's allowance methodology is based on guidance provided in Securities and Exchange Commission (SEC) Staff Accounting Bulletin (SAB) No. 102, "Selected Loan Loss Allowance Methodology and Documentation Issues," as well as other regulatory guidance. The allowance for loan losses, LHFI consists of three components: (i) a historical valuation allowance determined in accordance with FASB ASC Topic 450, "Contingencies," based on historical loan loss experience for LHFI with similar characteristics and trends, (ii) a specific valuation allowance determined in accordance with FASB ASC Topic 310 "Receivables," based on probable losses on specific LHFI and (iii) a qualitative risk valuation allowance determined in accordance with FASB ASC Topic 450 based on general economic conditions and other specific internal and external qualitative risk factors. Each of these components calls for estimates, assumptions and judgments as described below.

Historical Valuation Allowance

The historical valuation allowance is derived by application of a historical net loss percentage to the outstanding balances of LHFI contained in designated pools and risk rating categories. Pools are established by grouping credits that display similar characteristics and trends such as commercial LHFI for working capital purposes and non-working capital purposes, commercial real estate LHFI (which are further segregated into construction, land, lots and development, owner-occupied and non-owner occupied categories), 1-4 family LHFI and other consumer LHFI. Within these pools, LHFI are further segregated based on Trustmark's internal credit risk rating process that evaluates, among other things: the obligor's ability and willingness to pay, the value of underlying collateral, the ability of guarantors to meet their payment obligations, management experience and effectiveness, and the economic environment and industry in which the borrower operates. The historical net loss percentages, calculated on a quarterly basis, are proportionally distributed to each grade within loan groups based upon degree of risk.

The historical net loss percentages are calculated using a 12 quarter look-back period, which is the period that best reflects losses inherent in the current loan portfolio. The look-back period sufficiently captures the volatility in net charge-off rates from quarter to quarter and affects the qualitative adjustments that are required to capture the differences in conditions between the current period and those that were prevailing during the look-back period.

The loss emergence period refers to the period of time between the events that trigger a loss and charge-off of that loss. Losses are usually not immediately known and determining the loss event can be difficult. It takes time for the borrower and extent of loss to be identified and determined. Management may not be aware that the loss event has occurred until the borrower exhibits the inability to pay or other evidence of credit deterioration. Based upon its analysis, Trustmark has determined that a one year loss emergence period is appropriate.

Loans-Specific Valuation Allowance

Once a LHFI is classified, it is subject to periodic review to determine whether or not the loan is impaired. If determined to be impaired, the loan is evaluated using one of the valuation criteria contained in FASB ASC Topic 310. A formal impairment analysis is performed on all commercial non-accrual LHFI with an outstanding balance of $500,000 or more, and based upon this analysis LHFI are written down to net realizable value.

Qualitative Risk Valuation Allowance

The qualitative risk valuation allowance is based on general economic conditions and other internal and external factors affecting Trustmark as a whole as well as specific LHFI. Factors considered include the following within Trustmark's five key market regions: the experience, ability, and effectiveness of Trustmark's lending management and staff; adherence to Trustmark's loans policies, procedures, and internal controls; the volume of exceptions relating to collateral, underwriting and financial documentation; credit concentrations; recent performance trends; regional economic trends; the impact of recent acquisitions; and the impact of significant natural disasters. These factors are evaluated on a quarterly basis with the results incorporated into qualitative factor allocation matrices which are used to establish an appropriate allowance.

Other factors included in the qualitative risk valuation allowance include consideration of: commercial loan facility risk that embodies the nature, frequency and duration of the repayment structure as it pertains to the actual source of loan repayment, commercial nonaccrual loans under $500 thousand which are below the threshold to perform an impairment analysis, and independent consumer credit bureau scores that are monitored to identify shifts in risk that are represented in the retail portfolio. These factors are also evaluated on a quarterly basis with the exception of the commercial nonaccrual loans under $500 thousand which are evaluated monthly.

Acquired Loans

Acquired loans are accounted for under the acquisition method of accounting. The acquired loans are recorded at their estimated fair values at the time of acquisition. The fair value of acquired loans is determined using a discounted cash flow model based on assumptions regarding the amount and timing of principal and interest payments, estimated prepayments, estimated default rates, estimated loss severity in the event of defaults and current market rates. Estimated credit losses are included in the determination of fair value; therefore, an allowance for loan losses is not recorded on the acquisition date.

Trustmark accounts for acquired impaired loans under FASB ASC Topic 310-30, “Loans and Debt Securities Acquired with Deteriorated Credit Quality.” An acquired loan is considered impaired when there is evidence of credit deterioration since origination and it is probable at the date of acquisition that Trustmark would be unable to collect all contractually required payments. Acquired loans accounted for under FASB ASC Topic 310-30 are referred to as “acquired impaired loans.” Revolving credit agreements, such as home equity lines, and commercial leases are excluded from acquired impaired loan accounting requirements.

For acquired impaired loans, Trustmark (a) calculates the contractual amount and timing of undiscounted principal and interest payments (the “undiscounted contractual cash flows”) and (b) estimates the amount and timing of undiscounted expected principal and interest payments (the “undiscounted expected cash flows”). Under FASB ASC Topic 310-30, the difference between the undiscounted contractual cash flows and the undiscounted expected cash flows is the nonaccretable difference. The nonaccretable difference represents an estimate of the loss exposure of principal and interest related to the acquired impaired loan portfolio, and such amount is subject to change over time based on the performance of such loans. The excess of undiscounted expected cash flows at acquisition over the initial fair value of acquired impaired loans is referred to as the “accretable yield” and is recorded as interest income over the estimated life of the loans using the effective yield method if the timing and amount of the future cash flows is reasonably estimable. Under the effective yield method, the accretable yield is recorded as an accretion of interest income over the life of the loan at the market interest rate.

Trustmark aggregates certain acquired loans into pools of loans with common credit risk characteristics such as loan type and risk rating. To establish accounting pools of acquired loans, loans are first categorized by similar purpose, collateral and geographic region. Within each category, loans are further segmented by ranges of risk determinants observed at the time of acquisition. For commercial loans, the primary risk determinant is the risk rating as assigned by Trustmark. For consumer loans, the risk determinants include delinquency, delinquency history and FICO scores. Statistical comparison of the pools reflect that each pool is comprised of loans generally of similar characteristics, including loan type, loan risk and weighted average life. Each pool is then reviewed for similarity of the pool constituents, including standard deviation of purchase price, weighted average life and concentration of the largest loans. Loan pools are initially booked at the aggregate fair value of the loan pool constituents, based on the present value of Trustmark's expected cash flows from the loans. An acquired loan is removed from a pool of loans only if the loan is sold, foreclosed, payment is received in full satisfaction of the loan or the loan is fully charged off. The acquired loan is removed from the pool at the carrying value. If an individual acquired loan is removed from a pool of loans, the difference between its relative carrying amount and its cash, fair value of the collateral, or other assets received will be recognized as a gain or loss immediately in interest income on loans and would not affect the effective yield used to recognize the accretable yield on the remaining pool. Certain acquired loans are not pooled and are accounted for individually. Such loans are withheld from pools due to the inherent uncertainty of the timing and amount of their cash flows or because they are not a suitable similar constituent to the established pools.

As required by FASB ASC Topic 310-30, Trustmark periodically re-estimates the expected cash flows to be collected over the life of the acquired impaired loans. If, based on current information and events, it is probable that Trustmark will be unable to collect all cash flows expected at acquisition plus additional cash flows expected to be collected arising from changes in estimate after acquisition, the acquired loans are considered impaired. The decrease in the expected cash flows reduces the carrying value of the acquired impaired loans as well as the accretable yield and results in a charge to income through the provision for loan losses, acquired loans and the establishment of an allowance for loan losses, acquired loans. If, based on current information and events, it is probable that there is a significant increase in the cash flows previously expected to be collected or if actual cash flows are significantly greater than cash flows previously expected, Trustmark will reduce any remaining allowance for loan losses, acquired loans established on the acquired impaired loans for the increase in the present value of cash flows expected to be collected. The increase in the expected cash flows for the acquired impaired loans over those originally estimated at acquisition increases the carrying value of the acquired impaired loans as well as the accretable yield. The increase in the accretable yield is recognized as interest income prospectively over the remaining life of the acquired impaired loans. The carrying value of acquired impaired loans is reduced by payments received, both principal and interest, and increased by the portion of the accretable yield recognized as interest income.

Under FASB ASC Topic 310-30, acquired impaired loans are generally considered accruing and performing loans as the loans accrete interest income over the estimated life of the loan when expected cash flows are reasonably estimable. Accordingly, acquired impaired loans that are contractually past due are still considered to be accruing and performing loans as long as the estimated cash flows are received as expected. If the timing and amount of cash flows is not reasonably estimable, the loans may be classified as nonaccrual loans and interest income may be recognized on a cash basis or as a reduction of the principal amount outstanding.

Covered Loans

Loans acquired in a FDIC-assisted transaction and covered under loss-share agreements are referred to as “covered loans” and are reported separately in Trustmark’s consolidated financial statements. Covered loans are recorded at their estimated fair value at the time of acquisition exclusive of the expected reimbursement cash flows from the FDIC.

FDIC Indemnification Asset

Trustmark has elected to account for amounts receivable under a loss-share agreement as an indemnification asset in accordance with FASB ASC Topic 805, “Business Combinations.” A FDIC indemnification asset is initially recorded at fair value, based on the discounted value of expected future cash flows under the loss-share agreement. The difference between the present value at the acquisition date and the undiscounted cash flows Trustmark expects to collect from the FDIC is accreted into noninterest income over the life of the FDIC indemnification asset. Pursuant to the provisions of the loss-share agreement, the FDIC indemnification asset is presented net of any true-up provision due to the FDIC at the termination of the loss-share agreement.

The FDIC indemnification asset is reduced as expected losses on covered loans and covered other real estate decline or as loss-share claims are submitted to the FDIC. The FDIC indemnification asset is revalued concurrent with the loan re-estimation and adjusted for any changes in expected cash flows based on recent performance and expectations for future performance of covered loans and covered other real estate. These adjustments are measured on the same basis as the related covered loans and covered other real estate. Increases in the cash flows of the covered loans and covered other real estate over those expected reduce the FDIC indemnification asset, and decreases in the cash flows of the covered loans and covered other real estate below those expected increase the FDIC indemnification asset. Increases and decreases to the FDIC indemnification asset are recorded as adjustments to noninterest income.

Write-downs of the FDIC indemnification asset resulting from improvements in expected cash flows and covered losses based on the re-estimation of acquired covered loans are amortized over the lesser of the remaining life or contractual FDIC agreement period of the acquired covered loan as a yield adjustment consistent with the associated acquired covered loan. All other valuation changes of the FDIC indemnification asset (i.e., pay-offs of acquired covered loans, sales of covered other real estate, and reductions of FDIC loss claims) are accounted for under the “collectibility method,” which recognized write-downs of the FDIC indemnification asset immediately in noninterest income.

Premises and Equipment, Net

Premises and equipment are stated at cost, less accumulated depreciation and amortization. Depreciation is charged to expense over the estimated useful lives of the assets, which are up to thirty-nine years for buildings and three to ten years for furniture and equipment. Leasehold improvements are amortized over the terms of the respective leases or the estimated useful lives of the improvements, whichever is shorter. In cases where Trustmark has the right to renew the lease for additional periods, the lease term for the purpose of calculating amortization of the capitalized cost of the leasehold improvements is extended when Trustmark is “reasonably assured” that it will renew the lease. Depreciation and amortization expenses are computed using the straight-line method. Trustmark continually evaluates whether events and circumstances have occurred that indicate that such long-lived assets have become impaired. Measurement of any impairment of such long-lived assets is based on the fair values of those assets. There were no impairment losses on premises and equipment recorded during 2014, 2013 or 2012.

Mortgage Servicing Rights (MSR)

Trustmark recognizes as assets the rights to service mortgage loans based on the estimated fair value of the MSR when loans are sold and the associated servicing rights are retained. Trustmark has elected to account for MSR at fair value.

The fair value of MSR is determined using discounted cash flow techniques benchmarked against third-party valuations. Estimates of fair value involve several assumptions, including the key valuation assumptions about market expectations of future prepayment rates, interest rates and discount rates which are provided by a third-party firm. Prepayment rates are projected using an industry standard prepayment model. The model considers other key factors, such as a wide range of standard industry assumptions tied to specific portfolio characteristics such as remittance cycles, escrow payment requirements, geographic factors, foreclosure loss exposure, VA no-bid exposure, delinquency rates and cost of servicing, including base cost and cost to service delinquent mortgages. Prevailing market conditions at the time of analysis are factored into the accumulation of assumptions and determination of servicing value.

Trustmark economically hedges changes in fair value of the MSR attributable to interest rates. See Note 1 – Significant Accounting Policies, “Derivative Financial Instruments – Derivatives not Designated as Hedging Instruments” for information regarding these derivative instruments.

Goodwill and Identifiable Intangible Assets

Trustmark accounts for goodwill and other intangible assets in accordance with FASB ASC Topic 350, “Intangibles – Goodwill and Other.” Goodwill, which represents the excess of cost over the fair value of the net assets of an acquired business, is not amortized but tested for impairment on an annual basis, which is October 1 for Trustmark, or more often if events or circumstances indicate that there may be impairment.

Identifiable intangible assets are acquired assets that lack physical substance but can be distinguished from goodwill because of contractual or legal rights or because the assets are capable of being sold or exchanged either on their own or in combination with a related contract, asset or liability. Trustmark’s identifiable intangible assets primarily relate to core deposits, insurance customer relationships and borrower relationships. These intangibles, which have definite useful lives, are amortized on an accelerated basis over their estimated useful lives. In addition, these intangibles are evaluated annually for impairment or whenever events and changes in circumstances indicate that the carrying amount should be reevaluated. Trustmark also purchased banking charters in order to facilitate its entry into the states of Florida and Texas. These identifiable intangible assets are being amortized on a straight-line method over 20 years.

Other Real Estate

Other real estate includes assets that have been acquired in satisfaction of debt through foreclosure and is recorded at the lower of cost or estimated fair value less the estimated cost of disposition. Fair value is based on independent appraisals and other relevant factors. Valuation adjustments required at foreclosure are charged to the allowance for loan losses. Other real estate is revalued on an annual basis or more often if market conditions necessitate. Subsequent to foreclosure, losses on the periodic revaluation of the property are charged against an existing other real estate specific reserve or to noninterest expense in ORE/Foreclosure expense if a reserve does not exist. Costs of operating and maintaining the properties as well as gains or losses on their disposition are also included in ORE/Foreclosure expense as incurred. Improvements made to properties are capitalized if the expenditures are expected to be recovered upon the sale of the properties.

Covered Other Real Estate

All other real estate acquired in a FDIC-assisted acquisition that is subject to a FDIC loss-share agreement is referred to as “covered other real estate” and reported separately in Trustmark’s consolidated balance sheets. Covered other real estate is initially recorded at its estimated fair value on the acquisition date based on an independent appraisal less estimated selling costs. Foreclosed covered loan collateral is transferred into covered other real estate at the collateral’s net realizable value. Covered other real estate is reported exclusive of expected reimbursement cash flows from the FDIC. Any subsequent valuation adjustments due to declines in fair value are charged to noninterest expense in ORE/Foreclosure expense and are mostly offset by other noninterest income representing the corresponding increase to the FDIC indemnification asset for the offsetting loss reimbursement amount. Any recoveries of previous valuation adjustments are credited to ORE/Foreclosure expense with a corresponding charge to other noninterest income for the portion of the recovery that is due to the FDIC.

Federal Home Loan Bank (FHLB) and Federal Reserve Bank (FRB) of Atlanta Stock

Securities with limited marketability, such as stock in the FRB of Atlanta and the FHLB, are carried at cost. Trustmark’s investment in member bank stock is included in other assets because these equity securities do not have a readily determinable fair value, which places them outside the scope of FASB ASC Topic 320, “Investments – Debt and Equity Securities.” At December 31, 2014 and 2013, Trustmark’s investment in member bank stock totaled $44.1 million and $28.4 million, respectively. The carrying value of Trustmark’s member bank stock gave rise to no other-than-temporary impairment for the years ended December 31, 2014, 2013 and 2012.

Insurance Commissions

Commission revenue is recognized as of the effective date of the insurance policy or the date the customer is billed, whichever is later. Trustmark also receives contingent commissions from insurance companies as additional incentive for achieving specified premium volume goals and/or the loss experience of the insurance placed by Trustmark. Contingent commissions from insurance companies are recognized throughout the calendar year using reasonable estimates that are continuously reviewed and revised to reflect current experience. Trustmark maintains reserves for commission adjustments and doubtful accounts receivable which were not considered significant at December 31, 2014 or 2013.

Wealth Management

Assets under administration held by Trustmark in a fiduciary or agency capacity for customers are not included in the Trustmark’s consolidated balance sheets. Investment management and trust fee income is recorded on a cash basis, which because of the regularity of the billing cycles, approximates the accrual method, in accordance with industry practice.

Derivative Financial Instruments

Trustmark maintains an overall interest rate risk management strategy that incorporates the use of derivative instruments to minimize significant unplanned fluctuations in earnings and cash flows caused by interest rate volatility. Trustmark’s interest rate risk management strategy involves modifying the repricing characteristics of certain assets and liabilities so that changes in interest rates do not adversely affect the net interest margin and cash flows. Under the guidelines of FASB ASC Topic 815, “Derivatives and Hedging,” all derivative instruments are required to be recognized as either assets or liabilities and carried at fair value on the balance sheet. The fair value of derivative positions outstanding is included in other assets and/or other liabilities in the accompanying consolidated balance sheets and in the net change in these financial statement line items in the accompanying consolidated statements of cash flows as well as included in noninterest income in the accompanying consolidated statements of income and other comprehensive income (loss) in the accompanying consolidated statements of comprehensive income. Trustmark’s derivative instruments are subject to master netting agreements, and therefore, eligible for offsetting in the consolidated balance sheets. Trustmark has elected to not offset any derivative instruments in its consolidated balance sheets.

Derivatives Designated as Hedging Instruments

As part of Trustmark’s risk management strategy in the mortgage banking area, derivative instruments such as forward sales contracts are utilized. Trustmark’s obligations under forward contracts consist of commitments to deliver mortgage loans, originated and/or purchased, in the secondary market at a future date. The ineffective portion of changes in the fair value of the forward contracts and changes in the fair value of the loans designated as LHFS was recorded in noninterest income in mortgage banking, net. On October 1, 2014, Trustmark elected to account for its mortgage LHFS purchased or originated on or after the election date under the fair value option with unrealized gains and losses reported in noninterest income in mortgage banking, net. As a result of this election, the forward sales contracts no longer qualify as derivative instruments designated as fair value hedges under FASB ASC Topic 815. Subsequent to the election, changes in the fair value of these derivative instruments are recorded in noninterest income in mortgage banking, net and are offset by changes in the fair value of LHFS. See Note 1 – Significant Accounting Policies, “Loans Held for Sale (LHFS)” for information regarding the fair value option election.

During 2013, Trustmark entered into a forward interest rate swap contract on its junior subordinated debentures, with the objective of protecting the quarterly interest payments from the risk of variability of those payments resulting from changes in the three-month LIBOR interest rate for the five-year period beginning December 31, 2014 and ending December 31, 2019. This derivative instrument was designated as a cash flow hedge under FASB ASC Topic 815. Any accumulated net after-tax gains related to effective cash flow hedge are included in accumulated other comprehensive loss. Any ineffective portion of the interest rate swap is reclassified from accumulated other comprehensive loss to noninterest expense in the consolidated statements of income for the relevant periods. Beginning December 31, 2014, the effective date of the interest rate swap, amounts reported in accumulated other comprehensive loss related to this derivative will be reclassified to other interest expense as interest payments are made on Trustmark’s variable rate junior subordinated debentures.

Derivatives not Designated as Hedging Instruments

Trustmark utilizes a portfolio of exchange-traded derivative instruments, such as Treasury note futures contracts and option contracts, to achieve a fair value return that economically hedges changes in fair value of MSR attributable to interest rates. These transactions are considered freestanding derivatives that do not otherwise qualify for hedge accounting. These exchange-traded derivative instruments are accounted for at fair value with changes in the fair value recorded in noninterest income in mortgage banking, net and are offset by changes in the fair value of MSR. The MSR fair value represents the present value of future cash flows, which among other things includes decay and the effect of changes in interest rates. Ineffectiveness of hedging the MSR fair value is measured by comparing the change in value of hedge instruments to the change in the fair value of the MSR asset attributable to changes in interest rates and other market driven changes in valuation inputs and assumptions.

Trustmark also utilizes derivative instruments such as interest rate lock commitments in its mortgage banking area. Rate lock commitments are residential mortgage loan commitments with customers, which guarantee a specified interest rate for a specified time period. Changes in the fair value of these derivative instruments are recorded in noninterest income in mortgage banking, net and are offset by the changes in the fair value of forward sales contracts.

Trustmark offers certain derivatives products directly to qualified commercial lending clients seeking to manage their interest rate risk. Trustmark economically hedges interest rate swap transactions executed with commercial lending clients by entering into offsetting interest rate swap transactions with institutional derivatives market participants. Derivative transactions executed as part of this program are not designated as qualifying hedging relationships and are, therefore, carried at fair value with the change in fair value recorded in noninterest income in bank card and other fees. Because these derivatives have mirror-image contractual terms, in addition to collateral provisions which mitigate the impact of non-performance risk, the changes in fair value are expected to substantially offset.

Income Taxes

Trustmark accounts for uncertain tax positions in accordance with FASB ASC Topic 740, “Income Taxes,” which clarifies the accounting and disclosure for uncertainty in tax positions. Under the guidance of FASB ASC Topic 740, Trustmark accounts for deferred income taxes using the liability method. Deferred tax assets and liabilities are based on temporary differences between the financial statement carrying amounts and the tax basis of Trustmark’s assets and liabilities. Deferred tax assets and liabilities are measured using the enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be realized or settled and are presented net in the balance sheet in other assets.

Stock-Based Compensation

Trustmark accounts for the stock and incentive compensation under the provisions of FASB ASC Topic 718, “Compensation – Stock Compensation.” Under this accounting guidance, fair value is established as the measurement objective in accounting for stock awards and requires the application of a fair value based measurement method in accounting for compensation cost, which is recognized over the requisite service period.

Statements of Cash Flows

For purposes of reporting cash flows, cash and cash equivalents include cash on hand and amounts due from banks. The following table reflects specific transaction amounts for the periods presented ($ in thousands):

Years Ended December 31,

2014

2013

2012

Income taxes paid

13,710

14,520

57,834

Interest expense paid on deposits and borrowings

22,268

25,715

31,496

Noncash transfers from loans to foreclosed properties (1)

39,778

41,042

37,635

Transfer of long-term FHLB advances to short-term

6,644

Assets acquired in business combination

1,845,543

234,960

Liabilities assumed in business combination

1,821,066

209,322

-1

Includes transfers from covered loans to foreclosed properties.

During the first quarter of 2014, Trustmark identified an error in its Consolidated Statements of Cash Flows for the year ended December 31, 2013. Trustmark incorrectly reported its investment in bank-owned life insurance during the third quarter of 2013 as an operating activity instead of as an investing activity. During the third quarter of 2014, Trustmark identified an error in its Consolidated Statements of Cash Flows for the years ended December 31, 2013 and 2012. Trustmark incorrectly reported its investments in tax credit and other partnerships as an operating activity instead of as an investing activity. The errors occurred in the reported Consolidated Statements of Cash Flows and had no impact on the cash and cash equivalents at the end of the period within the Consolidated Statements of Cash Flows for the affected, or any prior or subsequent, periods. The errors did not affect any reported amounts in any other component of Trustmark’s consolidated financial statements for the affected, or any prior or subsequent, periods. Trustmark has evaluated the impact of the errors in accordance with FASB ASC Topic 250-10, “Accounting Changes and Error Corrections,” and deemed these changes immaterial to its consolidated financial statements taken as a whole and no restatement of Trustmark’s previously filed consolidated financial statements was required. In addition, Management has identified the cause of the errors and taken steps to prevent a future reoccurrence.

The following table reflects the changes to the Consolidated Statements of Cash Flows for the periods presented ($ in thousands):

As Reported

Adjustment

As Adjusted

Year Ended December 31, 2013:

Net cash provided by operating activities

155,417

145,766

301,183

Net cash used in investing activities

(113,201

)

(145,766

)

(258,967

)

Net cash provided by financing activities

72,056

Increase in cash and cash equivalents

114,272

Cash and cash equivalents at beginning of year

231,489

Cash and cash equivalents at end of year

345,761

Year Ended December 31, 2012:

Net cash provided by operating activities

92,125

20,152

112,277

Net cash provided by (used in) investing activities

193,891

(20,152

)

173,739

Net cash used in financing activities

(257,152

)

(257,152

)

Increase in cash and cash equivalents

28,864

Cash and cash equivalents at beginning of year

202,625

Cash and cash equivalents at end of year

231,489

Per Share Data

Trustmark accounts for per share data in accordance with FASB ASC Topic 260, “Earnings Per Share,” which provides that unvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are participating securities and shall be included in the computation of earnings per share (EPS) pursuant to the two-class method. Trustmark has determined that its outstanding unvested stock awards and deferred stock units are not participating securities. Based on this determination, no change has been made to Trustmark’s current computation for basic and diluted EPS.

Basic EPS is computed by dividing net income by the weighted-average shares of common stock outstanding. Diluted EPS is computed by dividing net income by the weighted-average shares of common stock outstanding, adjusted for the effect of potentially dilutive stock awards outstanding during the period.

The following table reflects weighted-average shares used to calculate basic and diluted EPS for the periods presented (in thousands):

Years Ended December 31,

2014

2013

2012

Basic shares

67,434

66,897

64,659

Dilutive shares

160

176

192

Diluted shares

67,594

67,073

64,851

Weighted-average antidilutive stock awards were excluded in determining diluted EPS. The following table reflects weighted-average antidilutive stock awards for the periods presented (in thousands):

Years Ended December 31,

2014

2013

2012

Weighted-average antidilutive stock awards

333

653

Fair Value Measurements

FASB ASC Topic 820, “Fair Value Measurements and Disclosures,” defines fair value, establishes a framework for measuring fair value in generally accepted accounting principles, and requires certain disclosures about fair value measurements. The fair value of an asset or liability is the price that would be received to sell that asset or paid to transfer that liability in an orderly transaction occurring in the principal market (or most advantageous market in the absence of a principal market) for such asset or liability. Depending on the nature of the asset or liability, Trustmark uses various valuation techniques and assumptions when estimating fair value. Inputs to valuation techniques include the assumptions that market participants would use in pricing an asset or liability. FASB ASC Topic 820 establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows:

Level 1 Inputs – Valuation is based upon quoted prices (unadjusted) in active markets for identical assets or liabilities that Trustmark has the ability to access at the measurement date.

Level 2 Inputs – Valuation is based upon quoted prices in active markets for similar assets or liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability such as interest rates, yield curves, volatilities and default rates and inputs that are derived principally from or corroborated by observable market data.

Level 3 Inputs – Unobservable inputs reflecting the reporting entity’s own determination about the assumptions that market participants would use in pricing the asset or liability based on the best information available.

In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the fair value measurement in its entirety is classified is based on the lowest level input that is significant to the fair value measurement in its entirety. Trustmark’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.

Accounting Policies Recently Adopted and Pending Accounting Pronouncements

ASU 2014-14, “Receivables – Troubled Debt Restructurings by Creditors (Subtopic 310-40): Classification of Certain Government-Guaranteed Residential Mortgage Loans upon Foreclosure (a consensus of the FASB Emerging Issues Task Force).” Issued in August 2014, ASU 2014-14 requires that a mortgage loan be derecognized and that a separate other receivable be recognized upon foreclosure if (1) the loan has a government guarantee that is not separable from the loan before foreclosure; (2) at the time of foreclosure, the creditor has the intent to convey the real estate property to the guarantor and make a claim on the guarantee, and the creditor has the ability to recover under the claim; and (3) at the time of foreclosure, any amount of the claim that is determined on the basis of the fair value of the real estate is fixed. ASU 2014-14 also provides that upon foreclosure, the separate other receivable would be measured based on the current amount of the loan balance (principal and interest) expected to be recovered under the guarantee. The amendments of ASU 2014-14 are effective for interim and annual periods beginning after December 15, 2014, and may be applied using either a modified retrospective transition method or a prospective transition method as described in ASU 2014-14. The adoption of ASU 2014-14 is not expected to have a material impact to Trustmark’s consolidated financial statements.

ASU 2014-11, “Transfers and Servicing (Topic 860) – Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures.” Issued in June 2014, ASU 2014-11 changes the accounting for repurchase-to-maturity transactions to secured borrowing accounting, and for repurchase financing arrangements requires separate accounting for a transfer of a financial asset executed contemporaneously with a repurchase agreement with the same counterparty, which will result in secured borrowing accounting for the repurchase agreement. ASU 2014-11 also requires disclosures for certain transactions comprising a transfer of a financial asset accounted for as a sale and an agreement with the same transferee entered into in contemplation of the initial transfer that results in the transferor retaining substantially all of the exposure to the economic return on the transferred financial asset throughout the term of the transaction. ASU 2014-11 requires interim and annual disclosures for repurchase agreements, securities lending transactions and repurchase-to-maturity transactions that are accounted for as secured borrowings, which include a disaggregation of the gross obligation by class of collateral pledged; the remaining contractual tenor of the agreements; and a discussion of the potential risks associated with the agreements and the related collateral pledged, including obligations arising from a decline in the fair value of the collateral pledged and how those risks are managed. The accounting changes and disclosure requirements for certain transactions accounted for as a sale in ASU 2014-11 are effective for interim and annual periods beginning after December 15, 2014. The disclosures for transactions accounted for as secured borrowings are required to be presented for annual periods beginning after December 15, 2014, and for interim periods beginning after March 15, 2015. Trustmark currently accounts for its repurchase agreements as secured borrowings; therefore, the adoption of ASU 2014-11 will be a change in presentation only for the newly required disclosures and will not have a material impact to Trustmark’s consolidated financial statements.

ASU 2014-09, “Revenue from Contracts with Customers (Topic 606).” Issued in May 2014, ASU 2014-09 will add FASB ASC Topic 606, “Revenue from Contracts with Customers,” and will supersede revenue recognition requirements in FASB ASC Topic 605, “Revenue Recognition,” as well as certain cost guidance in FASB ASC Topic 605-35, “Revenue Recognition – Construction-Type and Production-Type Contracts.” ASU 2014-09 provides a framework for revenue recognition that replaces the existing industry and transaction specific requirements under the existing standards. ASU 2014-09 requires an entity to apply a five-step model to determine when to recognize revenue and at what amount. The model specifies that revenue should be recognized when (or as) an entity transfers control of goods or services to a customer at the amount in which the entity expects to be entitled. Depending on whether certain criteria are met, revenue should be recognized either over time, in a manner that depicts the entity’s performance, or at a point in time, when control of the goods or services are transferred to the customer. ASU 2014-09 provides that an entity should apply the following steps: (1) identify the contract(s) with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when, or as, the entity satisfies a performance obligation. In addition, the existing requirements for the recognition of a gain or loss on the transfer of non-financial assets that are not in a contract with a customer are amended to be consistent with the guidance on recognition and measurement in ASU 2014-09. The amendments of ASU 2014-09 are effective for interim and annual periods beginning after December 15, 2016, and may be applied either retrospectively to each prior reporting period presented or retrospectively with the cumulative effect of initially applying ASU 2014-09 recognized at the date of initial application. If the transition method of application is elected, the entity should also provide the additional disclosures in reporting periods that include the date of initial application of (1) the amount by which each financial statement line item is affected in the current reporting period, as compared to the guidance that was in effect before the change, and (2) an explanation of the reasons for significant changes. Management is currently evaluating the impact this ASU will have on Trustmark’s consolidated financial statements as well as the most appropriate method of application; however, regardless of the method of application selected, the adoption of ASU 2014-09 is not expected to have a material impact to Trustmark’s consolidated financial statements.

ASU 2014-04, “Receivables – Troubled Debt Restructurings by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure (a consensus of the FASB Emerging Issues Task Force).” Issued in January 2014, ASU 2014-04 clarifies when an “in substance repossession or foreclosure” occurs, that is, when a creditor should be considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loans, such that all or a portion of the loan should be derecognized and the real estate property recognized. ASU 2014-04 states that a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure, or the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. The amendments of ASU 2014-04 also require interim and annual disclosure of both the amount of foreclosed residential real estate property held by the creditor and the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure. The amendments of ASU 2014-04 are effective for interim and annual periods beginning after December 15, 2014, and may be applied using either a modified retrospective transition method or a prospective transition method as described in ASU 2014-04. For Trustmark, the adoption of ASU 2014-04 will result in a change in presentation only for the newly required disclosures and is not expected to have a material impact to Trustmark’s consolidated financial statements.

ASU 2014-01, “Investments – Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Qualified Affordable Housing Projects (a consensus of the FASB Emerging Issues Task Force).” Issued in January 2014, ASU 2014-01 permits reporting entities that invest in qualified affordable housing projects to elect to account for those investments using the “proportional amortization method” if certain conditions are met. Under this method, an entity amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). The decision to apply the proportional amortization method of accounting is an accounting policy decision and should be applied consistently to all qualifying affordable housing project investments. ASU 2014-01 should be applied retrospectively to all periods presented and is effective for annual and interim reporting periods beginning after December 15, 2014. Trustmark currently accounts for its tax credit investments utilizing the equity method of accounting and does not have a significant amount of investments in qualified affordable housing projects that qualify for the low income housing tax credit. At this time, Trustmark does not intend to elect the proportional amortization method of accounting for its investments in low income housing tax credits; however, management will review any future investments in qualified affordable housing projects to determine if the investments meet the conditions required for using the proportional amortization method of accounting and make a decision regarding the accounting policy. The adoption of ASU 2014-01 is not expected to have a material impact to Trustmark’s consolidated financial statements.

ASU 2013-11, “Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (a consensus of the FASB Emerging Issues Task Force).” Issued in July 2013, ASU 2013-11 provides that an entity’s unrecognized tax benefit, or a portion of its unrecognized tax benefit, should be presented in its financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, with one exception. The exception states that to the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position, or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. ASU 2013-11 applies prospectively for all entities that have unrecognized tax benefits when a net operating loss carryforward, a similar tax loss, or tax credit carryforward exists at the reporting date. ASU 2013-11 became effective for Trustmark’s financial statements on January 1, 2014, and the adoption did not have a material impact to Trustmark’s consolidated financial statements.

Significant_Accounting_Policie2

Significant Accounting Policies (Tables)	12 Months Ended
Significant Accounting Policies (Tables)	Dec. 31, 2014
Significant Accounting Policies [Abstract]
Supplemental cash flow information	For purposes of reporting cash flows, cash and cash equivalents include cash on hand and amounts due from banks. The following table reflects specific transaction amounts for the periods presented ($ in thousands):

			Years Ended December 31,
			2014			2013			2012
	Income taxes paid		$	13,710		$	14,520		$	57,834
	Interest expense paid on deposits and borrowings			22,268			25,715			31,496
	Noncash transfers from loans to foreclosed properties (1)			39,778			41,042			37,635
	Transfer of long-term FHLB advances to short-term			6,644			-			-
	Assets acquired in business combination			-			1,845,543			234,960
	Liabilities assumed in business combination			-			1,821,066			209,322

	-1	Includes transfers from covered loans to foreclosed properties.
Schedule of changes in consolidated statements of cash flows	The following table reflects the changes to the Consolidated Statements of Cash Flows for the periods presented ($ in thousands):

			As Reported			Adjustment			As Adjusted
	Year Ended December 31, 2013:
	Net cash provided by operating activities		$	155,417		$	145,766		$	301,183
	Net cash used in investing activities			(113,201	)		(145,766	)		(258,967	)
	Net cash provided by financing activities			72,056			-			72,056
	Increase in cash and cash equivalents			114,272			-			114,272
	Cash and cash equivalents at beginning of year			231,489			-			231,489
	Cash and cash equivalents at end of year		$	345,761		$	-		$	345,761

	Year Ended December 31, 2012:
	Net cash provided by operating activities		$	92,125		$	20,152		$	112,277
	Net cash provided by (used in) investing activities			193,891			(20,152	)		173,739
	Net cash used in financing activities			(257,152	)		-			(257,152	)
	Increase in cash and cash equivalents			28,864			-			28,864
	Cash and cash equivalents at beginning of year			202,625			-			202,625
	Cash and cash equivalents at end of year		$	231,489		$	-		$	231,489
Weighted-average shares used to calculate basic and diluted EPS	The following table reflects weighted-average shares used to calculate basic and diluted EPS for the periods presented (in thousands):

			Years Ended December 31,
			2014			2013			2012
	Basic shares			67,434			66,897			64,659
	Dilutive shares			160			176			192
	Diluted shares			67,594			67,073			64,851
Weighted-average antidilutive stock awards excluded from determining diluted EPS	Weighted-average antidilutive stock awards were excluded in determining diluted EPS. The following table reflects weighted-average antidilutive stock awards for the periods presented (in thousands):

			Years Ended December 31,
			2014			2013			2012

	Weighted-average antidilutive stock awards			32			333			653

Business_Combinations_Tables

Business Combinations (Tables)	12 Months Ended
Business Combinations (Tables)	Dec. 31, 2014
BancTrust acquisition [Member]
Business Acquisition [Line Items]
Statement of assets purchased and liabilities assumed	Trustmark recorded fair value adjustments based on the estimated fair value of certain acquired loans, premises and equipment, net and other real estate. During 2013, these measurement period adjustments resulted in a decrease in acquired noncovered loans of $6.8 million, a decrease in premises and equipment, net of $627 thousand, a decrease in other real estate of $2.6 million, an increase in the deferred tax asset of $3.4 million and an increase in goodwill of $6.3 million. Trustmark also recorded an adjustment to transfer $1.6 million of acquired property from premises and equipment, net to other real estate during 2013. During the first quarter of 2014, Trustmark recorded an additional measurement period adjustment that resulted in a $7.4 million decrease in goodwill with a corresponding increase in the deferred tax asset. These measurement period adjustments were presented on a retrospective basis, consistent with applicable accounting guidance. The purchase price allocation was finalized during the first quarter of 2014.

	The statement of assets purchased and liabilities assumed in the BancTrust merger is presented below at their adjusted estimated fair values as of the merger date of February 15, 2013 ($ in thousands):

	Assets:
	Cash and due from banks	$	141,616
	Securities available for sale		528,016
	Loans held for sale		1,050
	Acquired noncovered loans		944,235
	Premises and equipment, net		54,952
	Identifiable intangible assets		33,498
	Other real estate		40,103
	Other assets		109,423
	Total Assets		1,852,893

	Liabilities:
	Deposits		1,740,254
	Other borrowings		64,051
	Other liabilities		16,761
	Total Liabilities		1,821,066

	Net identified assets acquired at fair value		31,827
	Goodwill		74,247
	Net assets acquired at fair value	$	106,074
Bay Bank and Trust Company [Member]
Business Acquisition [Line Items]
Statement of assets purchased and liabilities assumed	The statement of assets purchased and liabilities assumed in the Bay Bank merger is presented below at their estimated fair values as of the merger date of March 16, 2012 ($ in thousands):

	Assets:
	Cash and due from banks	$	88,154
	Securities available for sale		26,369
	Acquired noncovered loans		97,914
	Premises and equipment, net		9,466
	Identifiable intangible assets		7,017
	Other real estate		2,569
	Other assets		3,471
	Total Assets		234,960

	Liabilities:
	Deposits		208,796
	Other liabilities		526
	Total Liabilities		209,322

	Net assets acquired at fair value		25,638
	Consideration paid to Bay Bank		22,003

	Bargain purchase gain		3,635
	Income taxes		-
	Bargain purchase gain, net of taxes	$	3,635

Securities_Available_for_Sale_1

Securities Available for Sale and Held to Maturity (Tables)	12 Months Ended
Securities Available for Sale and Held to Maturity (Tables)	Dec. 31, 2014
Securities Available for Sale and Held to Maturity [Abstract]
Amortized cost and estimated fair value of available for sale and held to maturity securities	The following table is a summary of the amortized cost and estimated fair value of securities available for sale and held to maturity at December 31, 2014 and 2013 ($ in thousands):

		Securities Available for Sale												Securities Held to Maturity
	31-Dec-14	Amortized			Gross			Gross			Estimated			Amortized		Gross			Gross			Estimated
		Cost			Unrealized			Unrealized			Fair			Cost		Unrealized			Unrealized			Fair
					Gains			(Losses)			Value					Gains			(Losses)			Value
	U.S. Treasury securities	$	100		$	-		$	-		$	100		$	-	$	-		$	-		$	-
	U.S. Government agency obligations
	Issued by U.S. Government agencies		79,788			694			(826	)		79,656			-		-			-			-
	Issued by U.S. Government sponsored agencies		32,725			170			(77	)		32,818			100,971		2,631			-			103,602
	Obligations of states and political subdivisions		157,001			5,325			(68	)		162,258			63,505		3,398			-			66,903
	Mortgage-backed securities
	Residential mortgage pass-through securities
	Guaranteed by GNMA		11,897			544			(14	)		12,427			19,115		466			(16	)		19,565
	Issued by FNMA and FHLMC		199,599			4,842			-			204,441			11,437		471			-			11,908
	Other residential mortgage-backed securities
	Issued or guaranteed by FNMA, FHLMC or GNMA		1,655,733			16,664			(10,564	)		1,661,833			834,176		6,440			(1,916	)		838,700
	Commercial mortgage-backed securities
	Issued or guaranteed by FNMA, FHLMC or GNMA		184,394			4,968			(28	)		189,334			141,481		1,750			(1,063	)		142,168
	Asset-backed securities and structured financial products		30,776			924			-			31,700			-		-			-			-
	Total	$	2,352,013		$	34,131		$	(11,577	)	$	2,374,567		$	1,170,685	$	15,156		$	(2,995	)	$	1,182,846

	31-Dec-13
	U.S. Treasury securities	$	501		$	1		$	-		$	502		$	-	$	-		$	-		$	-
	U.S. Government agency obligations
	Issued by U.S. Government agencies		129,653			1,125			(1,485	)		129,293			-		-			-			-
	Issued by U.S. Government sponsored agencies		40,681			19			(521	)		40,179			100,159		-			(1,580	)		98,579
	Obligations of states and political subdivisions		165,810			6,243			(315	)		171,738			65,987		2,806			(281	)		68,512
	Mortgage-backed securities
	Residential mortgage pass-through securities
	Guaranteed by GNMA		14,099			459			(84	)		14,474			9,433		142			(72	)		9,503
	Issued by FNMA and FHLMC		239,880			3,147			(1,909	)		241,118			12,724		30			(162	)		12,592
	Other residential mortgage-backed securities
	Issued or guaranteed by FNMA, FHLMC or GNMA		1,300,375			12,459			(22,093	)		1,290,741			837,393		-			(15,072	)		822,321
	Commercial mortgage-backed securities
	Issued or guaranteed by FNMA, FHLMC or GNMA		235,317			7,278			(423	)		242,172			143,032		85			(3,791	)		139,326
	Asset-backed securities and structured financial products		62,689			1,248			-			63,937			-		-			-			-
	Total	$	2,189,005		$	31,979		$	(26,830	)	$	2,194,154		$	1,168,728	$	3,063		$	(20,958	)	$	1,150,833
Securities with gross unrealized losses, segregated by length of impairment	The table below includes securities with gross unrealized losses segregated by length of impairment at December 31, 2014 and 2013 ($ in thousands):

		Less than 12 Months						12 Months or More						Total
	31-Dec-14	Estimated			Gross			Estimated			Gross			Estimated		Gross
		Fair Value			Unrealized			Fair Value			Unrealized			Fair Value		Unrealized
					Losses						Losses					Losses
	U.S. Government agency obligations
	Issued by U.S. Government agencies	$	19,220		$	(115	)	$	32,656		$	(711	)	$	51,876	$	(826	)
	Issued by U.S. Government sponsored agencies		9,948			(52	)		9,956			(25	)		19,904		(77	)
	Obligations of states and political subdivisions		8,431			(22	)		3,800			(46	)		12,231		(68	)
	Mortgage-backed securities
	Residential mortgage pass-through securities
	Guaranteed by GNMA		7,199			(22	)		647			(8	)		7,846		(30	)
	Other residential mortgage-backed securities
	Issued or guaranteed by FNMA, FHLMC or GNMA		537,033			(2,449	)		395,342			(10,031	)		932,375		(12,480	)
	Commercial mortgage-backed securities
	Issued or guaranteed by FNMA, FHLMC or GNMA		9,134			(3	)		79,829			(1,088	)		88,963		(1,091	)
	Total	$	590,965		$	(2,663	)	$	522,230		$	(11,909	)	$	1,113,195	$	(14,572	)

	31-Dec-13
	U.S. Government agency obligations
	Issued by U.S. Government agencies	$	68,908		$	(1,485	)	$	-		$	-		$	68,908	$	(1,485	)
	Issued by U.S. Government sponsored agencies		138,478			(2,101	)		-			-			138,478		(2,101	)
	Obligations of states and political subdivisions		55,963			(586	)		796			(10	)		56,759		(596	)
	Mortgage-backed securities
	Residential mortgage pass-through securities
	Guaranteed by GNMA		14,732			(155	)		161			(1	)		14,893		(156	)
	Issued by FNMA and FHLMC		118,466			(2,071	)		-			-			118,466		(2,071	)
	Other residential mortgage-backed securities
	Issued or guaranteed by FNMA, FHLMC or GNMA		1,534,381			(36,750	)		23,458			(415	)		1,557,839		(37,165	)
	Commercial mortgage-backed securities
	Issued or guaranteed by FNMA, FHLMC or GNMA		177,412			(4,214	)		-			-			177,412		(4,214	)
	Total	$	2,108,340		$	(47,362	)	$	24,415		$	(426	)	$	2,132,755	$	(47,788	)
Gains and losses as a result of calls and disposition of securities	For the periods presented, gains and losses as a result of calls and dispositions of securities, as well as any associated proceeds, were as follows ($ in thousands):

		Years Ended December 31,
	Available for Sale	2014			2013			2012
	Proceeds from calls and sales of securities	$	56,815		$	224,853		$	38,364
	Gross realized gains		456			1,680			1,052
	Gross realized losses		(156	)		(1,195	)		(2	)

	Held to Maturity
	Proceeds from calls of securities	$	-		$	-		$	335
	Gross realized gains		-			-			9
Contractual maturities of available for sale and held to maturity securities	The amortized cost and estimated fair value of securities available for sale and held to maturity at December 31, 2014, by contractual maturity, are shown below ($ in thousands). Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

		Securities						Securities
		Available for Sale						Held to Maturity
					Estimated						Estimated
		Amortized			Fair			Amortized			Fair
		Cost			Value			Cost			Value
	Due in one year or less	$	18,088		$	18,236		$	2,496		$	2,513
	Due after one year through five years		137,976			142,016			11,693			12,298
	Due after five years through ten years		61,738			63,811			137,991			142,604
	Due after ten years		82,588			82,469			12,296			13,090
			300,390			306,532			164,476			170,505
	Mortgage-backed securities		2,051,623			2,068,035			1,006,209			1,012,341
	Total	$	2,352,013		$	2,374,567		$	1,170,685		$	1,182,846

Loans_Held_for_Investment_LHFI1

Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI (Tables)	12 Months Ended
	Dec. 31, 2014
Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI [Abstract]
Loan portfolio held for investment	At December 31, 2014 and 2013, LHFI consisted of the following ($ in thousands):

		2014			2013
	Loans secured by real estate:
	Construction, land development and other land	$	619,877		$	596,889
	Secured by 1-4 family residential properties		1,634,397			1,485,564
	Secured by nonfarm, nonresidential properties		1,553,193			1,415,139
	Other		253,787			189,362
	Commercial and industrial loans		1,270,350			1,157,614
	Consumer loans		167,964			165,308
	Other loans		949,901			789,005
	LHFI		6,449,469			5,798,881
	Less allowance for loan losses, LHFI		69,616			66,448
	Net LHFI	$	6,379,853		$	5,732,433
Summary of LHFI evaluated for impairment	The following table details LHFI individually and collectively evaluated for impairment at December 31, 2014 and 2013 ($ in thousands):

		31-Dec-14
		LHFI Evaluated for Impairment
		Individually			Collectively			Total
	Loans secured by real estate:
	Construction, land development and other land	$	13,867		$	606,010		$	619,877
	Secured by 1-4 family residential properties		25,621			1,608,776			1,634,397
	Secured by nonfarm, nonresidential properties		25,717			1,527,476			1,553,193
	Other		1,318			252,469			253,787
	Commercial and industrial loans		12,104			1,258,246			1,270,350
	Consumer loans		88			167,876			167,964
	Other loans		628			949,273			949,901
	Total	$	79,343		$	6,370,126		$	6,449,469


		31-Dec-13
		LHFI Evaluated for Impairment
		Individually			Collectively			Total
	Loans secured by real estate:
	Construction, land development and other land	$	13,327		$	583,562		$	596,889
	Secured by 1-4 family residential properties		21,603			1,463,961			1,485,564
	Secured by nonfarm, nonresidential properties		21,809			1,393,330			1,415,139
	Other		1,327			188,035			189,362
	Commercial and industrial loans		6,286			1,151,328			1,157,614
	Consumer loans		151			165,157			165,308
	Other loans		735			788,270			789,005
	Total	$	65,238		$	5,733,643		$	5,798,881
Impaired financing receivables	At December 31, 2014 and 2013, the carrying amount of LHFI individually evaluated for impairment consisted of the following ($ in thousands):

		31-Dec-14
		LHFI
		Unpaid			With No Related			With an			Total					Average
		Principal			Allowance			Allowance			Carrying			Related		Recorded
		Balance			Recorded			Recorded			Amount			Allowance		Investment
	Loans secured by real estate:
	Construction, land development and other land	$	20,849		$	7,411		$	6,456		$	13,867		$	2,767	$	13,597
	Secured by 1-4 family residential properties		31,151			1,650			23,971			25,621			450		23,612
	Secured by nonfarm, nonresidential properties		27,969			12,868			12,849			25,717			2,787		23,763
	Other		1,594			-			1,318			1,318			52		1,322
	Commercial and industrial loans		13,916			1,206			10,898			12,104			6,449		9,195
	Consumer loans		152			-			88			88			-		120
	Other loans		734			-			628			628			259		682
	Total	$	96,365		$	23,135		$	56,208		$	79,343		$	12,764	$	72,291

		31-Dec-13
		LHFI
		Unpaid			With No Related			With an			Total					Average
		Principal			Allowance			Allowance			Carrying			Related		Recorded
		Balance			Recorded			Recorded			Amount			Allowance		Investment
	Loans secured by real estate:
	Construction, land development and other land	$	24,350		$	9,817		$	3,510		$	13,327		$	989	$	20,216
	Secured by 1-4 family residential properties		26,541			3,095			18,508			21,603			191		24,359
	Secured by nonfarm, nonresidential properties		24,879			10,225			11,584			21,809			2,307		20,049
	Other		1,375			-			1,327			1,327			122		2,641
	Commercial and industrial loans		8,702			2,506			3,780			6,286			1,253		5,513
	Consumer loans		286			-			151			151			2		255
	Other loans		849			-			735			735			317		767
	Total	$	86,982		$	25,643		$	39,595		$	65,238		$	5,181	$	73,800
Impact of modifications classified as troubled debt restructurings	The following table illustrates the impact of modifications classified as TDRs as well as those TDRs modified within the last 12 months for which there was a payment default during the period for the years ended December 31, 2014, 2013 and 2012 ($ in thousands):

		Year Ended December 31, 2014
	Troubled Debt Restructurings	Number of Contracts			Pre-Modification			Post-Modification
					Outstanding			Outstanding
					Recorded			Recorded
					Investment			Investment
	Loans secured by 1-4 family residential properties		17		$	1,248		$	1,234

		Year Ended December 31, 2013
	Troubled Debt Restructurings	Number of Contracts			Pre-Modification			Post-Modification
					Outstanding			Outstanding
					Recorded			Recorded
					Investment			Investment
	Loans secured by 1-4 family residential properties		10		$	498		$	441
	Loans secured by nonfarm, nonresidential properties		1			952			952
	Commercial and industrial loans		2			944			937
	Other loans		1			2,490			2,490
	Total		14		$	4,884		$	4,820

		Year Ended December 31, 2012
	Troubled Debt Restructurings	Number of Contracts			Pre-Modification			Post-Modification
					Outstanding			Outstanding
					Recorded			Recorded
					Investment			Investment
	Construction, land development and other land loans		12		$	4,092		$	4,092
	Loans secured by 1-4 family residential properties		48			5,399			5,383
	Loans secured by nonfarm, nonresidential properties		2			1,210			1,210
	Other loans secured by real estate		1			199			199
	Commercial and industrial loans		1			148			-
	Total		64		$	11,048		$	10,884
Troubled debt restructuring subsequently defaulted		Years Ended December 31,
		2014						2013						2012
	Troubled Debt Restructurings that Subsequently Defaulted	Number of Contracts			Recorded Investment			Number of Contracts			Recorded Investment			Number of Contracts		Recorded Investment
	Construction, land development and other land loans		-		$	-			-		$	-			7	$	1,881
	Loans secured by 1-4 family residential properties		1			103			5			345			16		1,469
	Loans secured by nonfarm, nonresidential properties		-			-			-			-			1		862
	Total		1		$	103			5		$	345			24	$	4,212
Troubled debt restructuring related to loans held for investment, excluding covered loans, by loan type	The following tables detail LHFI classified as TDRs by loan type at December 31, 2014, 2013 and 2012 ($ in thousands):

		31-Dec-14
		Accruing			Nonaccrual			Total
	Construction, land development and other land loans	$	-		$	3,665		$	3,665
	Loans secured by 1-4 family residential properties		1,385			3,733			5,118
	Loans secured by nonfarm, nonresidential properties		-			1,854			1,854
	Other loans secured by real estate		-			149			149
	Commercial and industrial loans		-			509			509
	Total TDRs by type	$	1,385		$	9,910		$	11,295

		31-Dec-13
		Accruing			Nonaccrual			Total
	Construction, land development and other land loans	$	-		$	6,247		$	6,247
	Loans secured by 1-4 family residential properties		1,320			4,201			5,521
	Loans secured by nonfarm, nonresidential properties		-			2,292			2,292
	Other loans secured by real estate		-			167			167
	Commercial and industrial loans		-			549			549
	Total TDRs by type	$	1,320		$	13,456		$	14,776

		31-Dec-12
		Accruing			Nonaccrual			Total
	Construction, land development and other land loans	$	233		$	12,073		$	12,306
	Loans secured by 1-4 family residential properties		1,280			5,908			7,188
	Loans secured by nonfarm, nonresidential properties		-			4,582			4,582
	Other loans secured by real estate		-			197			197
	Total TDRs by type	$	1,513		$	22,760		$	24,273
Carrying amount of loans by credit quality indicator	The table below illustrates the carrying amount of LHFI by credit quality indicator at December 31, 2014 and 2013 ($ in thousands):

					31-Dec-14
					Commercial LHFI
					Pass –			Special Mention -			Substandard –			Doubtful –		Subtotal
					Categories 1-6			Category 7			Category 8			Category 9		Subtotal
	Loans secured by real estate:
	Construction, land development and other land				$	518,944		$	479		$	37,022		$	196	$	556,641
	Secured by 1-4 family residential properties					125,203			1,652			7,483			213		134,551
	Secured by nonfarm, nonresidential properties					1,462,226			8,431			81,661			-		1,552,318
	Other					246,099			306			4,975			-		251,380
	Commercial and industrial loans					1,239,247			4,245			26,133			719		1,270,344
	Consumer loans					-			-			-			-		-
	Other loans					928,251			7,550			6,779			564		943,144
					$	4,519,970		$	22,663		$	164,053		$	1,692	$	4,708,378

		Consumer LHFI
		Current			Past Due			Past Due			Nonaccrual			Subtotal		Total LHFI
		Current			30-89 Days			90 Days or More			Nonaccrual			Subtotal		Total LHFI
	Loans secured by real estate:
	Construction, land development and other land	$	62,897		$	199		$	59		$	81		$	63,236	$	619,877
	Secured by 1-4 family residential properties		1,465,355			10,429			2,367			21,695			1,499,846		1,634,397
	Secured by nonfarm, nonresidential properties		875			-			-			-			875		1,553,193
	Other		2,407			-			-			-			2,407		253,787
	Commercial and industrial loans		-			5			1			-			6		1,270,350
	Consumer loans		165,504			2,162			211			87			167,964		167,964
	Other loans		6,757			-			-			-			6,757		949,901
		$	1,703,795		$	12,795		$	2,638		$	21,863		$	1,741,091	$	6,449,469

					31-Dec-13
					Commercial LHFI
					Pass –			Special Mention -			Substandard –			Doubtful –		Subtotal
					Categories 1-6			Category 7			Category 8			Category 9		Subtotal
	Loans secured by real estate:
	Construction, land development and other land				$	493,380		$	4,383		$	47,610		$	318	$	545,691
	Secured by 1-4 family residential properties					119,640			479			7,839			110		128,068
	Secured by nonfarm, nonresidential properties					1,313,470			12,620			87,203			399		1,413,692
	Other					178,951			-			6,756			235		185,942
	Commercial and industrial loans					1,099,429			18,771			37,209			2,187		1,157,596
	Consumer loans					496			-			-			-		496
	Other loans					777,395			60			4,126			669		782,250
					$	3,982,761		$	36,313		$	190,743		$	3,918	$	4,213,735

		Consumer LHFI
		Current			Past Due			Past Due			Nonaccrual			Subtotal		Total LHFI
		Current			30-89 Days			90 Days or More			Nonaccrual			Subtotal		Total LHFI
	Loans secured by real estate:
	Construction, land development and other land	$	50,850		$	131		$	-		$	217		$	51,198	$	596,889
	Secured by 1-4 family residential properties		1,327,624			8,937			2,996			17,939			1,357,496		1,485,564
	Secured by nonfarm, nonresidential properties		1,439			8			-			-			1,447		1,415,139
	Other		3,418			2			-			-			3,420		189,362
	Commercial and industrial loans		13			5			-			-			18		1,157,614
	Consumer loans		162,348			2,012			302			150			164,812		165,308
	Other loans		6,755			-			-			-			6,755		789,005
		$	1,552,447		$	11,095		$	3,298		$	18,306		$	1,585,146	$	5,798,881
Aging analysis of past due loans and nonaccrual loans, excluding covered loans by class	LHFI past due 90 days or more totaled $2.8 million and $3.3 million at December 31, 2014 and 2013, respectively. The following table provides an aging analysis of past due and nonaccrual LHFI by class at December 31, 2014 and 2013 ($ in thousands):

		31-Dec-14
		Past Due
		30-59 Days			60-89 Days			90 Days			Total			Nonaccrual		Current		Total LHFI
		30-59 Days			60-89 Days			or More (1)			Total			Nonaccrual		Loans		Total LHFI
	Loans secured by real estate:
	Construction, land development and other land	$	248		$	17		$	60		$	325		$	13,867	$	605,685	$	619,877
	Secured by 1-4 family residential properties		8,424			2,428			2,367			13,219			25,621		1,595,557		1,634,397
	Secured by nonfarm, nonresidential properties		1,960			34			-			1,994			25,717		1,525,482		1,553,193
	Other		80			-			-			80			1,318		252,389		253,787
	Commercial and industrial loans		2,491			306			126			2,923			12,104		1,255,323		1,270,350
	Consumer loans		1,811			351			211			2,373			88		165,503		167,964
	Other loans		132			9			-			141			628		949,132		949,901
	Total	$	15,146		$	3,145		$	2,764		$	21,055		$	79,343	$	6,349,071	$	6,449,469

	(1) Past due 90 days or more but still accruing interest.

		31-Dec-13
		Past Due
		30-59 Days			60-89 Days			90 Days			Total			Nonaccrual		Current		Total LHFI
		30-59 Days			60-89 Days			or More (1)			Total			Nonaccrual		Loans		Total LHFI
	Loans secured by real estate:
	Construction, land development and other land	$	656		$	267		$	-		$	923		$	13,327	$	582,639	$	596,889
	Secured by 1-4 family residential properties		7,322			2,115			2,996			12,433			21,603		1,451,528		1,485,564
	Secured by nonfarm, nonresidential properties		1,934			110			-			2,044			21,809		1,391,286		1,415,139
	Other		2			3			-			5			1,327		188,030		189,362
	Commercial and industrial loans		809			198			-			1,007			6,286		1,150,321		1,157,614
	Consumer loans		1,866			146			302			2,314			151		162,843		165,308
	Other loans		17			-			-			17			735		788,253		789,005
	Total	$	12,606		$	2,839		$	3,298		$	18,743		$	65,238	$	5,714,900	$	5,798,881

	(1) Past due 90 days or more but still accruing interest.
Change in allowance for loan losses	Changes in the allowance for loan losses, LHFI were as follows for the periods presented ($ in thousands):

		Years Ended December31,
		2014			2013			2012
	Balance at beginning of period	$	66,448		$	78,738		$	89,518
	Loans charged-off		(13,226	)		(13,478	)		(31,376	)
	Recoveries		15,183			14,609			13,830
	Net recoveries (charge-offs)		1,957			1,131			(17,546	)
	Provision for loan losses, LHFI		1,211			(13,421	)		6,766
	Balance at end of period	$	69,616		$	66,448		$	78,738

	The following tables detail the balance in the allowance for loan losses, LHFI by portfolio segment at December 31, 2014 and 2013, respectively ($ in thousands):

		2014
		Balance									Provision for			Balance
		January 1,			Charge-offs			Recoveries			Loan Losses			December 31,
	Loans secured by real estate:
	Construction, land development and other land	$	13,165		$	(1,100	)	$	3,608		$	(2,600	)	$	13,073
	Secured by 1-4 family residential properties		9,633			(2,505	)		922			1,627			9,677
	Secured by nonfarm, nonresidential properties		19,672			(390	)		944			(1,703	)		18,523
	Other		2,080			(277	)		-			338			2,141
	Commercial and industrial loans		15,522			(2,092	)		2,657			3,830			19,917
	Consumer loans		2,405			(1,965	)		3,883			(2,174	)		2,149
	Other loans		3,971			(4,897	)		3,169			1,893			4,136
	Total allowance for loan losses, LHFI	$	66,448		$	(13,226	)	$	15,183		$	1,211		$	69,616

		Disaggregated by Impairment Method
		Individually			Collectively			Total
	Loans secured by real estate:
	Construction, land development and other land	$	2,767		$	10,306		$	13,073
	Secured by 1-4 family residential properties		450			9,227			9,677
	Secured by nonfarm, nonresidential properties		2,787			15,736			18,523
	Other		52			2,089			2,141
	Commercial and industrial loans		6,449			13,468			19,917
	Consumer loans		-			2,149			2,149
	Other loans		259			3,877			4,136
	Total allowance for loan losses, LHFI	$	12,764		$	56,852		$	69,616
		2013
		Balance									Provision for			Balance
		January 1,			Charge-offs			Recoveries			Loan Losses			December 31,
	Loans secured by real estate:
	Construction, land development and other land	$	21,838		$	(1,441	)	$	3,077		$	(10,309	)	$	13,165
	Secured by 1-4 family residential properties		12,957			(1,298	)		427			(2,453	)		9,633
	Secured by nonfarm, nonresidential properties		21,096			(1,002	)		225			(647	)		19,672
	Other		2,197			(910	)		229			564			2,080
	Commercial and industrial loans		14,319			(1,371	)		2,298			276			15,522
	Consumer loans		3,087			(2,425	)		4,798			(3,055	)		2,405
	Other loans		3,244			(5,031	)		3,555			2,203			3,971
	Total allowance for loan losses, LHFI	$	78,738		$	(13,478	)	$	14,609		$	(13,421	)	$	66,448

		Disaggregated by Impairment Method
		Individually			Collectively			Total
	Loans secured by real estate:
	Construction, land development and other land	$	988		$	12,177		$	13,165
	Secured by 1-4 family residential properties		191			9,442			9,633
	Secured by nonfarm, nonresidential properties		2,307			17,365			19,672
	Other		123			1,957			2,080
	Commercial and industrial loans		1,253			14,269			15,522
	Consumer loans		2			2,403			2,405
	Other loans		317			3,654			3,971
	Total allowance for loan losses, LHFI	$	5,181		$	61,267		$	66,448

Acquired_Loans_Tables

Acquired Loans (Tables)	12 Months Ended
Acquired Loans (Tables)	Dec. 31, 2014
Acquired Loans [Abstract]
Schedule of covered and noncovered acquired loans by type	At December 31, 2014 and 2013, acquired loans consisted of the following ($ in thousands):

			31-Dec-14								31-Dec-13
			Noncovered				Covered				Noncovered				Covered
	Loans secured by real estate:
	Construction, land development and other land		$	58,309			$	1,197			$	98,928			$	2,363
	Secured by 1-4 family residential properties			116,920				13,180				157,914				16,416
	Secured by nonfarm, nonresidential properties			202,323				7,672				287,136				10,945
	Other			27,813				1,096				33,948				2,644
	Commercial and industrial loans			88,256				277				149,495				394
	Consumer loans			9,772				-				18,428				119
	Other loans			22,390				204				24,141				1,335
	Acquired loans			525,783				23,626				769,990				34,216
	Less allowance for loan losses, acquired loans			10,541				1,518				7,249				2,387
	Net acquired loans		$	515,242			$	22,108			$	762,741			$	31,829
Fair value of acquired loans	The following table presents the adjusted fair value of loans acquired as of the date of the BancTrust merger ($ in thousands):

	At acquisition date:		15-Feb-13
	Contractually required principal and interest		$	1,256,669
	Nonaccretable difference			201,324
	Cash flows expected to be collected			1,055,345
	Accretable yield			98,394
	FASB ASC Topic 310-20 discount			12,716
	Fair value of loans at acquisition		$	944,235
Changes in the carrying value of acquired loans	The following table presents changes in the net carrying value of the acquired loans for the periods presented ($ in thousands):

			Noncovered								Covered
			Acquired				Acquired				Acquired				Acquired
			Impaired				Not ASC 310-30 (1)				Impaired				Not ASC 310-30 (1)
	Carrying value, net at January 1, 2013		$	72,942			$	6,696			$	45,391			$	2,460
	Loans acquired (2)			790,335				153,900				-				-
	Accretion to interest income			35,538				2,628				5,150				159
	Payments received, net			(229,618	)			(39,281	)			(18,976	)			(819	)
	Other (3)			(24,177	)			(858	)			(3,202	)			(137	)
	Less change in allowance for loan losses, acquired loans			(5,364	)			-				1,803				-
	Carrying value, net at December 31, 2013			639,656				123,085				30,166				1,663
	Accretion to interest income			44,575				1,706				4,052				1
	Payments received, net			(216,378	)			(42,284	)			(12,396	)			(30	)
	Other (3)			(29,724	)			(2,102	)			(1,733	)			(484	)
	Less change in allowance for loan losses, acquired loans			(3,978	)			686				415				454
	Carrying value, net at December 31, 2014		$	434,151			$	81,091			$	20,504			$	1,604

	(1) "Acquired Not ASC 310-30" loans consist of revolving credit agreements and commercial leases that are not in scope for FASB ASC Topic 310-30.
	(2) Adjusted fair value of loans acquired from BancTrust on February 15, 2013.
	(3) Includes acquired loan terminations through foreclosure, charge-off, pool recovery and other terminations.
Changes in accretable yield of acquired loans	The following table presents changes in the accretable yield for the years ended December 31, 2014 and 2013 ($ in thousands):

			Years Ended December 31,
			2014				2013
	Accretable yield at beginning of period		$	(109,006	)		$	(26,383	)
	Additions due to acquisition (1)			-				(98,394	)
	Accretion to interest income			48,627				40,688
	Disposals			16,383				18,438
	Reclassification to / (from) nonaccretable difference (2)			(33,153	)			(43,355	)
	Accretable yield at end of period		$	(77,149	)		$	(109,006	)

	(1) Accretable yield on loans acquired from BancTrust on February 15, 2013, including measurement period adjustments.
	(2) Reclassifications from nonaccretable difference are due to lower loss expectations and improvements in expected cashflows.
Components of the allowance for loan losses on acquired impaired loans	The following tables present the components of the allowance for loan losses on acquired impaired loans for the years ended December 31, 2014, 2013 and 2012 ($ in thousands):

			Noncovered				Covered				Total
	Balance at January 1, 2014		$	7,249			$	2,387			$	9,636
	Provision for loan losses, acquired loans			7,149				(978	)			6,171
	Loans charged-off			(6,274	)			127				(6,147	)
	Recoveries			2,417				(18	)			2,399
	Net (charge-offs) recoveries			(3,857	)			109				(3,748	)
	Balance at December 31, 2014		$	10,541			$	1,518			$	12,059

			Noncovered				Covered				Total
	Balance at January 1, 2013		$	1,885			$	4,190			$	6,075
	Provision for loan losses, acquired loans			7,367				(1,328	)			6,039
	Loans charged-off			(3,634	)			(460	)			(4,094	)
	Recoveries			1,631				(15	)			1,616
	Net charge-offs			(2,003	)			(475	)			(2,478	)
	Balance at December 31, 2013		$	7,249			$	2,387			$	9,636

			Noncovered				Covered				Total
	Balance at January 1, 2012		$	-			$	502			$	502
	Provision for loan losses, acquired loans			1,916				3,612				5,528
	Loans charged-off			(290	)			(81	)			(371	)
	Recoveries			259				157				416
	Net (charge-offs) recoveries			(31	)			76				45
	Balance at December 31, 2012		$	1,885			$	4,190			$	6,075
Carrying amount of acquired loans by credit quality indicator	The tables below illustrate the carrying amount of acquired loans by credit quality indicator at December 31, 2014 and 2013 ($ in thousands):

			31-Dec-14
							Commercial Loans
							Pass -				Special Mention -				Substandard -				Doubtful -
							Categories 1-6				Category 7				Category 8				Category 9			Subtotal
	Noncovered Loans:
	Loans secured by real estate:
	Construction, land development and other land						$	20,224			$	280			$	28,339			$	5,821		$	54,664
	Secured by 1-4 family residential properties							30,796				760				8,466				388			40,410
	Secured by nonfarm, nonresidential properties							157,753				3,452				39,408				1,710			202,323
	Other							22,754				92				4,864				95			27,805
	Commercial and industrial loans							64,720				17				19,706				3,813			88,256
	Consumer loans							-				-				-				-			-
	Other loans							19,706				45				2,617				-			22,368
	Total noncovered loans							315,953				4,646				103,400				11,827			435,826

	Covered Loans: (1)
	Loans secured by real estate:
	Construction, land development and other land							-				-				955				102			1,057
	Secured by 1-4 family residential properties							194				235				1,045				-			1,474
	Secured by nonfarm, nonresidential properties							4,419				88				2,879				-			7,386
	Other							-				108				426				2			536
	Commercial and industrial loans							145				24				108				-			277
	Consumer loans							-				-				-				-			-
	Other loans							204				-				-				-			204
	Total covered loans							4,962				455				5,413				104			10,934
	Total acquired loans						$	320,915			$	5,101			$	108,813			$	11,931		$	446,760

			Consumer Loans
							Past Due				Past Due											Total
			Current				30-89 Days				90 Days or More				Nonaccrual				Subtotal			Acquired Loans
	Noncovered Loans:
	Loans secured by real estate:
	Construction, land development and other land			3,338				25				282			$	-			$	3,645		$	58,309
	Secured by 1-4 family residential properties			71,316				2,335				2,742				117				76,510			116,920
	Secured by nonfarm, nonresidential properties			-				-				-				-				-			202,323
	Other			8				-				-				-				8			27,813
	Commercial and industrial loans			-				-				-				-				-			88,256
	Consumer loans			9,634				114				24				-				9,772			9,772
	Other loans			22				-				-				-				22			22,390
	Total noncovered loans			84,318				2,474				3,048				117				89,957			525,783

	Covered Loans: (1)
	Loans secured by real estate:
	Construction, land development and other land			140				-				-				-				140			1,197
	Secured by 1-4 family residential properties			10,925				473				308				-				11,706			13,180
	Secured by nonfarm, nonresidential properties			286				-				-				-				286			7,672
	Other			525				-				35				-				560			1,096
	Commercial and industrial loans			-				-				-				-				-			277
	Consumer loans			-				-				-				-				-			-
	Other loans			-				-				-				-				-			204
	Total covered loans			11,876				473				343				-				12,692			23,626
	Total acquired loans		$	96,194			$	2,947			$	3,391			$	117			$	102,649		$	549,409

	(1) Total dollar balances are presented in this table; however, these loans are covered by the loss-share agreement with the FDIC.
	TNB is at risk for only 20% of the losses incurred on these loans.

			31-Dec-13
							Commercial Loans
							Pass -				Special Mention -				Substandard -				Doubtful -
							Categories 1-6				Category 7				Category 8				Category 9			Subtotal
	Noncovered Loans:
	Loans secured by real estate:
Construction, land development and other land						$	39,075			$	2,506			$	42,486			$	8,445		$	92,512
Secured by 1-4 family residential properties							33,810				2,983				17,422				538			54,753
Secured by nonfarm, nonresidential properties							184,594				9,027				88,952				4,563			287,136
Other							28,156				1,437				4,071				184			33,848
Commercial and industrial loans							116,818				2,248				24,084				6,039			149,189
Consumer loans							21				-				-				-			21
Other loans							21,881				-				882				1,306			24,069
Total noncovered loans							424,355				18,201				177,897				21,075			641,528

Covered Loans: (1)
Loans secured by real estate:
Construction, land development and other land							228				-				1,126				771			2,125
Secured by 1-4 family residential properties							1,629				430				1,798				-			3,857
Secured by nonfarm, nonresidential properties							5,446				109				4,723				-			10,278
Other							832				134				717				2			1,685
Commercial and industrial loans							254				28				112				-			394
Consumer loans							-				-				-				-			-
Other loans							271				-				414				646			1,331
Total covered loans							8,660				701				8,890				1,419			19,670
Total acquired loans						$	433,015			$	18,902			$	186,787			$	22,494		$	661,198

		Consumer Loans
						Past Due				Past Due											Total
		Current				30-89 Days				90 Days or More				Nonaccrual				Subtotal			Acquired Loans
Noncovered Loans:
Loans secured by real estate:
Construction, land development and other land		$	5,813			$	108			$	495			$	-			$	6,416		$	98,928
Secured by 1-4 family residential properties			95,987				3,599				3,466				109				103,161			157,914
Secured by nonfarm, nonresidential properties			-				-				-				-				-			287,136
Other			100				-				-				-				100			33,948
Commercial and industrial loans			306				-				-				-				306			149,495
Consumer loans			18,076				239				92				-				18,407			18,428
Other loans			72				-				-				-				72			24,141
Total noncovered loans			120,354				3,946				4,053				109				128,462			769,990

Covered Loans: (1)
Loans secured by real estate:
Construction, land development and other land			133				77				28				-				238			2,363
Secured by 1-4 family residential properties			11,179				428				952				-				12,559			16,416
Secured by nonfarm, nonresidential properties			495				-				172				-				667			10,945
Other			617				342				-				-				959			2,644
Commercial and industrial loans			-				-				-				-				-			394
Consumer loans			119				-				-				-				119			119
Other loans			4				-				-				-				4			1,335
Total covered loans			12,547				847				1,152				-				14,546			34,216
Total acquired loans		$	132,901			$	4,793			$	5,205			$	109			$	143,008		$	804,206

-1	Total dollar balances are presented in this table; however, these loans are covered by the loss-share agreement with the FDIC. TNB is at risk for only 20% of the losses incurred on these loans.
Aging analysis of past due and nonaccrual acquired loans, by class	The following tables provide an aging analysis of contractually past due and nonaccrual acquired loans, by class at December 31, 2014 and 2013 ($ in thousands):

			31-Dec-14
			Past Due
			30-59 Days				60-89 Days				90 Days				Total				Nonaccrual (2)			Current		Total Acquired
			30-59 Days				60-89 Days				or More (1)				Total				Nonaccrual (2)			Loans		Loans
	Noncovered loans:
	Loans secured by real estate:
	Construction, land development and other land		$	246			$	7			$	21,985			$	22,238			$	194		$	35,877	$	58,309
	Secured by 1-4 family residential properties			2,576				981				5,162				8,719				422			107,779		116,920
	Secured by nonfarm, nonresidential properties			89				865				13,275				14,229				-			188,094		202,323
	Other			-				-				604				604				-			27,209		27,813
	Commercial and industrial loans			334				128				1,099				1,561				461			86,234		88,256
	Consumer loans			86				29				24				139				-			9,633		9,772
	Other loans			-				-				-				-				-			22,390		22,390
	Total noncovered loans			3,331				2,010				42,149				47,490				1,077			477,216		525,783

	Covered loans:
	Loans secured by real estate:
	Construction, land development and other land			-				-				376				376				-			821		1,197
	Secured by 1-4 family residential properties			253				296				477				1,026				-			12,154		13,180
	Secured by nonfarm, nonresidential properties			239				488				-				727				-			6,945		7,672
	Other			-				-				368				368				-			728		1,096
	Commercial and industrial loans			-				-				42				42				67			168		277
	Consumer loans			-				-				-				-				-			-		-
	Other loans			-				-				-				-				-			204		204
	Total covered loans			492				784				1,263				2,539				67			21,020		23,626
	Total acquired loans		$	3,823			$	2,794			$	43,412			$	50,029			$	1,144		$	498,236	$	549,409

	(1) Past due 90 days or more but still accruing interest.
	(2) Acquired loans not accounted for under FASB ASC Topic 310-30.

			31-Dec-13
			Past Due
			30-59 Days				60-89 Days				90 Days				Total				Nonaccrual (2)			Current		Total Acquired
			30-59 Days				60-89 Days				or More (1)				Total				Nonaccrual (2)			Loans		Loans
	Noncovered loans:
	Loans secured by real estate:
	Construction, land development and other land		$	1,648			$	468			$	31,744			$	33,860			$	67		$	65,001	$	98,928
	Secured by 1-4 family residential properties			3,901				1,166				7,589				12,656				116			145,142		157,914
	Secured by nonfarm, nonresidential properties			4,851				3,127				15,421				23,399				461			263,276		287,136
	Other			40				-				1,922				1,962				33			31,953		33,948
	Commercial and industrial loans			526				217				3,387				4,130				1,170			144,195		149,495
	Consumer loans			205				34				92				331				-			18,097		18,428
	Other loans			-				-				153				153				20			23,968		24,141
	Total noncovered loans			11,171				5,012				60,308				76,491				1,867			691,632		769,990

	Covered loans:
	Loans secured by real estate:
	Construction, land development and other land			87				-				553				640				445			1,278		2,363
	Secured by 1-4 family residential properties			515				358				1,142				2,015				-			14,401		16,416
	Secured by nonfarm, nonresidential properties			243				1,662				793				2,698				-			8,247		10,945
	Other			571				139				2				712				-			1,932		2,644
	Commercial and industrial loans			13				-				-				13				41			340		394
	Consumer loans			-				-				-				-				-			119		119
	Other loans			-				-				646				646				-			689		1,335
	Total covered loans			1,429				2,159				3,136				6,724				486			27,006		34,216
	Total acquired loans		$	12,600			$	7,171			$	63,444			$	83,215			$	2,353		$	718,638	$	804,206

	(1) Past due 90 days or more but still accruing interest.
	(2) Acquired loans not accounted for under FASB ASC Topic 310-30.

Premises_and_Equipment_Net_Tab

Premises and Equipment, Net (Tables)	12 Months Ended
Premises and Equipment, Net (Tables)	Dec. 31, 2014
Premises and Equipment, Net [Abstract]
Premises and equipment	At December 31, 2014 and 2013, premises and equipment are summarized as follows ($ in thousands):

		2014		2013
	Land	$	57,794	$	58,132
	Buildings and leasehold improvements		198,739		199,976
	Furniture and equipment		162,321		154,633
	Total cost of premises and equipment		418,854		412,741
	Less accumulated depreciation and amortization		218,073		205,458
	Premises and equipment, net	$	200,781	$	207,283

Mortgage_Banking_Tables

Mortgage Banking (Tables)	12 Months Ended
Mortgage Banking (Tables)	Dec. 31, 2014
Mortgage Banking [Abstract]
Schedule of activity in mortgage servicing rights	The activity in MSR is detailed in the table below for the periods presented ($ in thousands):

		Years Ended December 31,
		2014			2013
	Balance at beginning of period	$	67,834		$	47,341
	Origination of servicing assets		12,293			18,481
	Change in fair value:
	Due to market changes		(7,202	)		11,818
	Due to runoff		(8,567	)		(9,806	)
	Balance at end of period	$	64,358		$	67,834
Schedule of mortgage loans sold and serviced for others	The table below details the mortgage loans sold and serviced for others at December 31, 2014 and 2013 ($ in thousands):

		31-Dec-14			31-Dec-13
	Federal National Mortgage Association	$	3,579,987		$	3,499,659
	Government National Mortgage Association		1,948,565			1,830,420
	Federal Home Loan Mortgage Corporation		80,551			92,599
	Other		27,146			37,998
	Total mortage loans sold and serviced for others	$	5,636,249		$	5,460,676
Changes in the reserve for mortgage loan servicing putback expense	Changes in the reserve for mortgage loan servicing putback expense were as follows for the periods presented ($ in thousands):

		Years Ended December 31,
		2014			2013			2012
	Balance at beginning of period	$	1,050		$	7,800		$	4,277
	Provision for putback expenses		600			1,561			8,015
	Losses		(480	)		(4,756	)		(4,492	)
	FNMA resolution		-			(3,555	)		-
	Balance at end of period	$	1,170		$	1,050		$	7,800

Goodwill_and_Identifiable_Inta1

Goodwill and Identifiable Intangible Assets (Tables)	12 Months Ended
Goodwill and Identifiable Intangible Assets (Tables)	Dec. 31, 2014
Goodwill and Identifiable Intangible Assets [Abstract]
Goodwill by segment	The table below illustrates goodwill by segment for the years ended December 31, 2014 and 2013 ($ in thousands):

		General
		Banking			Insurance		Total
	Balance as of January 1, 2013	$	246,736		$	44,368	$	291,104
	Goodwill from acquisitions during 2013		81,747			-		81,747
	Balance as of December 31, 2013		328,483			44,368		372,851
	Measurement period adjustment during 2014		(7,351	)		-		(7,351	)
	Balance as of December 31, 2014	$	321,132		$	44,368	$	365,500
Schedule of identifiable intangible assets	At December 31, 2014 and 2013, identifiable intangible assets consisted of the following ($ in thousands):

		2014								2013
		Gross Carrying			Accumulated		Net Carrying			Gross Carrying		Accumulated		Net Carrying
		Amount			Amortization		Amount			Amount		Amortization		Amount
	Core deposit intangibles	$	85,824		$	54,464	$	31,360		$	85,824	$	46,437	$	39,387
	Insurance intangibles		11,693			10,566		1,127			11,693		9,967		1,726
	Banking charters		1,325			745		580			1,325		678		647
	Borrower relationship intangible		690			523		167			690		460		230
	Total	$	99,532		$	66,298	$	33,234		$	99,532	$	57,542	$	41,990
	The following table illustrates the carrying amounts and remaining weighted-average amortization periods of identifiable intangible assets as of December 31, 2014 ($ in thousands):

					Remaining
					Weighted-
					Average
		Net Carrying			Amortization
		Amount			Period in Years
	Core deposit intangibles	$	31,360			7.5
	Insurance intangibles		1,127			4.9
	Banking charters		580			8.7
	Borrower relationship intangible		167			2.7
	Total	$	33,234			7.4

Other_Real_Estate_and_Covered_1

Other Real Estate and Covered Other Real Estate (Tables)	12 Months Ended
Other Real Estate and Covered Other Real Estate (Tables)	Dec. 31, 2014
Other Real Estate and Covered Other Real Estate [Abstract]
Changes and losses, net on non-covered other real estate	For the years ended December 31, 2014, 2013 and 2012, changes and gains (losses), net on other real estate, excluding covered other real estate, were as follows ($ in thousands):

			2014			2013			2012
	Balance at beginning of period		$	106,539		$	78,189		$	79,053
	Additions (1)			37,428			80,256			38,894
	Disposals			(43,802	)		(45,545	)		(33,155	)
	Write-downs			(7,656	)		(6,361	)		(6,603	)
	Balance at end of period		$	92,509		$	106,539		$	78,189

	Gain (loss), net on the sale of other real estate included in ORE/Foreclosure expense		$	3,697		$	(881	)	$	(279	)

	-1	Includes $40.1 million of other real estate acquired from BancTrust on February 15, 2013, and $2.6 million of other real estate acquired from Bay Bank on March 16, 2012.
Other real estate by type of property	At December 31, 2014 and 2013, other real estate, excluding covered other real estate, by type of property consisted of the following ($ in thousands):

			2014			2013
	Construction, land development and other land properties		$	61,015		$	65,273
	1-4 family residential properties			10,150			14,696
	Nonfarm, nonresidential properties			19,696			26,433
	Other real estate properties			1,648			137
	Total other real estate, excluding covered other real estate		$	92,509		$	106,539
Other real estate by geographic location	At December 31, 2014 and 2013, other real estate, excluding covered other real estate, by geographic location consisted of the following ($ in thousands):

			2014			2013
	Alabama		$	21,196		$	25,912
	Florida			35,324			34,480
	Mississippi (1)			17,397			22,766
	Tennessee (2)			10,292			12,892
	Texas			8,300			10,489
	Total other real estate, excluding covered other real estate		$	92,509		$	106,539

	-1	Mississippi includes Central and Southern Mississippi Regions
	-2	Tennessee includes Memphis, Tennessee and Northern Mississippi Regions
Changes, gains and losses, net on covered other real estate	For the years ended December 31, 2014, 2013 and 2012, changes and gains, net on covered other real estate were as follows ($ in thousands):

			2014			2013			2012
	Balance at beginning of period		$	5,108		$	5,741		$	6,331
	Transfers from covered loans			2,851			1,934			1,424
	FASB ASC 310-30 adjustment for the residual recorded investment			136			(345	)		(112	)
	Net transfers from covered loans			2,987			1,589			1,312
	Disposals			(1,232	)		(1,442	)		(1,631	)
	Write-downs			(803	)		(780	)		(271	)
	Balance at end of period		$	6,060		$	5,108		$	5,741

	Gain, net on the sale of covered other real estate included in ORE/Foreclosure expenses		$	24		$	119		$	485
Covered other real estate by type of property	At December 31, 2014 and 2013, covered other real estate consisted of the following types of properties ($ in thousands):

			2014			2013
	Construction, land development and other land properties		$	1,917		$	733
	1-4 family residential properties			1,103			1,981
	Nonfarm, nonresidential properties			2,296			2,394
	Other real estate properties			744			-
	Total covered other real estate		$	6,060		$	5,108

FDIC_Indemnification_Asset_Tab

FDIC Indemnification Asset (Tables)	12 Months Ended
FDIC Indemnification Asset (Tables)	Dec. 31, 2014
FDIC Indemnification Asset [Abstract]
Changes in FDIC indemnification asset	For the years ended December 31, 2014, 2013 and 2012, changes in the FDIC indemnification asset were as follows ($ in thousands):

		2014			2013			2012
	Balance at beginning of period	$	14,347		$	21,774		$	28,348
	(Amortization) Accretion		(2,074	)		(2,469	)		245
	Transfers to FDIC claims		(4,443	)		(851	)		(2,544	)
	Change in expected cash flows		(517	)		(3,472	)		(3,761	)
	Change in FDIC true-up provision		(316	)		(635	)		(514	)
	Balance at end of period	$	6,997		$	14,347		$	21,774

Deposits_Tables

Deposits (Tables)	12 Months Ended
Deposits (Tables)	Dec. 31, 2014
Deposits [Abstract]
Deposits summary	At December 31, 2014 and 2013, deposits consisted of the following ($ in thousands):

		2014		2013
	Noninterest-bearing demand	$	2,748,635	$	2,663,503
	Interest-bearing demand		1,722,581		1,923,701
	Savings		3,280,060		2,997,294
	Time		1,947,082		2,275,404
	Total	$	9,698,358	$	9,859,902
Interest expense on deposits by type	Interest expense on deposits by type consisted of the following for the years ended December 31, 2014, 2013 and 2012 ($ in thousands):

		2014		2013		2012
	Interest-bearing demand	$	3,151	$	3,948	$	3,975
	Savings		2,949		3,889		6,004
	Time		9,223		11,881		14,625
	Total	$	15,323	$	19,718	$	24,604
Maturities on outstanding time deposits of $100,000 or more	The maturities on outstanding time deposits of $100,000 or more at December 31, 2014 and 2013 are as follows ($ in thousands):

		2014		2013
	3 months or less	$	199,087	$	242,757
	Over 3 months through 6 months		168,886		208,863
	Over 6 months through 12 months		227,130		312,189
	Over 12 months		222,119		208,208
	Total	$	817,222	$	972,017
Maturities of interest-bearing deposits	The maturities of interest-bearing deposits at December 31, 2014, are as follows ($ in thousands):

	2015	$	1,462,039
	2016		272,973
	2017		114,574
	2018		52,329
	2019 and thereafter		45,167
	Total time deposits		1,947,082
	Interest-bearing deposits with no stated maturity		5,002,641
	Total interest-bearing deposits	$	6,949,723

Borrowings_Tables

Borrowings (Tables)	12 Months Ended
Borrowings (Tables)	Dec. 31, 2014
Borrowings [Abstract]
Short-term borrowings	At December 31, 2014 and 2013, short-term borrowings consisted of the following ($ in thousands):

		2014		2013
	FHLB advances	$	356,758	$	2,062
	Serviced GNMA loans eligible for repurchase		41,014		38,036
	Other		27,305		26,287
	Total short-term borrowings	$	425,077	$	66,385

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Dec. 31, 2014
Income Taxes [Abstract]
Income tax provision	The income tax provision included in the statements of income was as follows for the years ended December 31, 2014, 2013 and 2012 ($ in thousands):


	Current	2014			2013			2012
	Federal	$	17,761		$	14,537		$	48,186
	State		2,068			1,237			2,366
	Deferred
	Federal		16,256			18,394			(7,349	)
	State		2,444			2,769			(1,103	)
	Income tax provision	$	38,529		$	36,937		$	42,100
Income tax reconciliation	For the years ended December 31, 2014, 2013 and 2012, the income tax provision differs from the amount computed by applying the statutory federal income tax rate of 35% to income before income taxes as a result of the following ($ in thousands):

		2014			2013			2012
	Income tax computed at statutory tax rate	$	56,732		$	53,899		$	55,784
	Tax exempt interest		(5,612	)		(5,222	)		(5,150	)
	Nondeductible interest expense		107			121			144
	State income taxes, net		2,933			2,604			821
	Income tax credits		(15,212	)		(15,755	)		(9,255	)
	Other		(419	)		1,290			(244	)
	Income tax provision	$	38,529		$	36,937		$	42,100
Deferred tax assets and liabilities	Temporary differences between the financial statement carrying amounts and the tax basis of assets and liabilities gave rise to the following net deferred tax assets at December 31, 2014 and 2013, which are included in other assets ($ in thousands):

	Deferred tax assets:	2014			2013
	Loan purchase accounting	$	38,471		$	63,048
	Other real estate		36,086			47,981
	Allowance for loan losses		31,241			29,102
	Deferred compensation		20,825			20,000
	Realized built in losses		15,907			9,182
	Securities		15,443			17,741
	Pension and other postretirement benefit plans		14,904			7,511
	Nonaccrual loans		3,372			4,452
	Stock-based compensation		3,077			3,357
	Other		17,833			14,771
	Gross deferred tax asset		197,159			217,145
	Valuation allowance		(8,650	)		(16,000	)
	Deferred tax asset net of valuation allowance		188,509			201,145

	Deferred tax liabilities:
	Goodwill and other identifiable intangibles		28,010			29,809
	Premises and equipment		20,813			21,543
	Unrealized gains on securities available for sale		8,627			1,969
	Mortgage servicing rights		7,747			8,145
	Securities		1,353			1,270
	Leases		625			3,290
	Other		3,900			4,642
	Gross deferred tax liability		71,075			70,668
	Net deferred tax asset	$	117,434		$	130,477
Changes in unrecognized tax benefits	The following table provides a summary of the changes during the 2014 calendar year in the amount of unrecognized tax benefits that are included in other liabilities in the consolidated balance sheet ($ in thousands):

	Balance at January 1, 2014	$	1,779
	Increases due to tax positions taken during the current year		670
	Increases due to tax positions taken during a prior year		60
	Decreases due to the lapse of applicable statute of limitations during the current year		(306	)
	Decreases due to settlements with taxing authorities during the current year		(43	)
	Balance at December 31, 2014	$	2,160

	Accrued interest, net of federal benefit, at December 31, 2014	$	437

	Unrecognized tax benefits that would impact the effective tax rate, if recognized, at December 31, 2014	$	1,603

Defined_Benefit_and_Other_Post1

Defined Benefit and Other Postretirement Benefits (Tables)	12 Months Ended
Defined Benefit and Other Postretirement Benefits (Tables)	Dec. 31, 2014
Trustmark Capital Accumulation Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan benefit obligation, plan assets and funded status of the plan	The following tables present information regarding the benefit obligation, plan assets, funded status, amounts recognized in accumulated other comprehensive loss, net periodic benefit cost and other statistical disclosures for Trustmark’s qualified defined benefit pension plans (Trustmark Capital Accumulation Plan and BancTrust Pension Plan) ($ in thousands):

		December 31,
		2014			2013
	Change in benefit obligation:
	Benefit obligation, beginning of year	$	128,974		$	103,235
	Benefit obligation from business combination		-			43,138
	Service cost		495			595
	Interest cost		5,299			4,758
	Actuarial loss (gain)		11,675			(8,060	)
	Benefits paid for BancTrust Pension Plan		(38,853	)		-
	Benefits paid for Trustmark Capital Accumulation Plan		(7,041	)		(14,692	)
	Settlement loss from BancTrust termination		1,355			-
	Benefit obligation, end of year	$	101,904		$	128,974

	Change in plan assets:
	Fair value of plan assets, beginning of year	$	126,142		$	76,660
	Fair value of plan assets from business combination		-			40,391
	Actual return on plan assets		4,632			21,661
	Employer contributions		1,407			2,122
	Benefit payments for BancTrust Pension Plan		(38,853	)		-
	Benefit payments for Trustmark Capital Accumulation Plan		(7,041	)		(14,692	)
	Fair value of plan assets, end of year	$	86,287		$	126,142

	Funded status at end of year - net liability	$	(15,617	)	$	(2,832	)

	Amounts recognized in accumulated other comprehensive loss:
	Net loss - amount recognized	$	28,100		$	15,436
Net periodic benefit Cost		Years Ended December 31,
		2014			2013			2012
	Net periodic benefit cost:
	Service cost	$	495		$	595		$	547
	Interest cost		5,299			4,758			3,942
	Expected return on plan assets		(6,245	)		(7,720	)		(5,983	)
	Recognized net loss due to BancTrust termination		1,355			-			-
	Recognized net loss due to lump sum settlements		905			2,225			-
	Recognized net actuarial (gain) loss		(283	)		5,516			5,225
	Net periodic benefit cost	$	1,526		$	5,374		$	3,731

	Other changes in plan assets and benefit obligation recognized in other comprehensive income (loss), before taxes:
	Net loss (gain) - Total recognized in other comprehensive income (loss)	$	12,664		$	(29,742	)	$	(3,861	)
	Total recognized in net periodic benefit cost and other comprehensive income (loss)	$	14,190		$	(24,368	)	$	(130	)

	Weighted-average assumptions as of end of year:
	Discount rate for benefit obligation		3.57	%		4.3	%		3.5	%
	Discount rate for net periodic benefit cost		4.3	%		3.5	%		4	%
	Expected long-term return on plan assets		7.5	%		7.5	%		8	%
Weighted-average asset allocation	The weighted-average asset allocations by asset category for Trustmark’s qualified defined benefit pension plans at December 31, 2014 and 2013 are presented below. Due to the termination and full distribution of the BancTrust Pension Plan during 2014, December 31, 2014 includes only amounts related to the Trustmark Capital Accumulation Plan.

		2014			2013
	Money market fund		8.7	%		5.2	%
	Fixed income mutual funds		11.9	%		17.6	%
	Equity mutual funds		72.2	%		58.4	%
	Equity securities		7	%		18.7	%
	Fixed income hedge fund		0.2	%		0.1	%
	Total		100	%		100	%
Plan assets measured at fair value	The following table sets forth by level, within the fair value hierarchy, the qualified defined benefit pension plans’ assets measured at fair value at December 31, 2014 and 2013 ($ in thousands):

		31-Dec-14
		Total			Level 1			Level 2			Level 3
	Money market fund	$	7,544		$	7,544		$	-		$	-
	Fixed income mutual funds		10,267			10,267			-			-
	Equity mutual funds		62,265			62,265			-			-
	Equity securities		6,057			6,057			-			-
	Fixed income hedge fund		154			-			-			154
	Total assets at fair value	$	86,287		$	86,133		$	-		$	154

		31-Dec-13
		Total			Level 1			Level 2			Level 3
	Money market fund	$	6,563		$	6,563		$	-		$	-
	Fixed income mutual funds		22,225			15,245			6,980			-
	Equity mutual funds		73,608			73,608			-			-
	Equity securities		23,583			23,583			-			-
	Fixed income hedge fund		163			-			-			163
	Total assets at fair value	$	126,142		$	118,999		$	6,980		$	163
Changes in fair value of plan level three assets	The following table sets forth a summary of changes in fair value of the Level 3 plan assets for the years ended December 31, 2014 and 2013 ($ in thousands):

		Fixed Income Hedge Fund
	Balance, January 1, 2013	$	163
	Change in fair value		-
	Balance, December 31, 2013		163
	Change in fair value		(9	)
	Balance, December 31, 2014	$	154
Estimated future benefit payments and other disclosures	The following table presents the expected benefit payments, which reflect expected future service, for Trustmark’s Capital Accumulation Plan ($ in thousands):

	Year	Amount
	2015	$	10,654
	2016		8,402
	2017		7,734
	2018		6,346
	2019		6,286
	2020 - 2024		28,762
Supplemental Retirement Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan benefit obligation, plan assets and funded status of the plan	Trustmark maintains a nonqualified supplemental retirement plan covering directors who elected to defer fees, key executive officers and senior officers. The plan provides for defined death benefits and/or retirement benefits based on a participant's covered salary. Trustmark has acquired life insurance contracts on the participants covered under the plan, which may be used to fund future payments under the plan. The measurement date for the plan is December 31. As a result of the BancTrust merger on February 15, 2013, Trustmark became the administrator of an additional nonqualified supplemental retirement plan, for which the plan benefits were frozen prior to the merger date.

	The following tables present information regarding the benefit obligation, plan assets, funded status, amounts recognized in accumulated other comprehensive loss, net periodic benefit cost and other statistical disclosures for Trustmark’s nonqualified supplemental retirement plans ($ in thousands):

		December 31,
		2014			2013
	Change in benefit obligation:
	Benefit obligation, beginning of year	$	52,489		$	56,619
	Benefit obligation from business combination		-			1,658
	Service cost		296			597
	Interest cost		2,198			1,943
	Actuarial loss (gain)		7,392			(4,187	)
	Benefits paid		(2,631	)		(4,141	)
	Benefit obligation, end of year	$	59,744		$	52,489

	Change in plan assets:
	Fair value of plan assets, beginning of year	$	-		$	-
	Employer contributions		2,631			4,141
	Benefit payments		(2,631	)		(4,141	)
	Fair value of plan assets, end of year	$	-		$	-

	Funded status at end of year - net liability	$	(59,744	)	$	(52,489	)

	Amounts recognized in accumulated other comprehensive loss:
	Net loss	$	21,242		$	14,509
	Prior service cost		1,860			2,110
	Amounts recognized	$	23,102		$	16,619
Net periodic benefit Cost		Years Ended December 31,
		2014			2013			2012
	Net periodic benefit cost:
	Service cost	$	296		$	597		$	679
	Interest cost		2,198			1,943			2,067
	Amortization of prior service cost		250			250			250
	Recognized net actuarial loss		661			1,038			861
	Net periodic benefit cost	$	3,405		$	3,828		$	3,857

	Other changes in plan assets and benefit obligation recognized in other comprehensive income (loss), before taxes:
	Net loss (gain)	$	6,733		$	(5,224	)	$	2,507
	Prior service cost		-			-			198
	Amortization of prior service cost		(250	)		(250	)		(250	)
	Total recognized in other comprehensive income (loss)	$	6,483		$	(5,474	)	$	2,455
	Total recognized in net periodic benefit cost and other comprehensive income (loss)	$	9,888		$	(1,646	)	$	6,312

	Weighted-average assumptions as of end of year:
	Discount rate for benefit obligation		3.57	%		4.3	%		3.5	%
	Discount rate for net periodic benefit cost		4.3	%		3.5	%		4	%
Estimated future benefit payments and other disclosures	The following table presents the expected benefits payments for Trustmark’s supplemental retirement plans ($ in thousands):

	Year	Amount
	2015	$	2,868
	2016		3,145
	2017		3,479
	2018		3,591
	2019		3,656
	2020 - 2024		19,504

Stock_and_Incentive_Compensati1

Stock and Incentive Compensation Plans (Tables)	12 Months Ended
Stock and Incentive Compensation Plans (Tables)	Dec. 31, 2014
Stock and Incentive Compensation Plans [Abstract]
Summary of stock and incentive plans' vesting periods and contractual terms [Table Text Block]	The following table summarizes the stock and incentive plans’ vesting periods and contractual terms in years:

		Vesting			Contractual
		Period			Term
	Stock option awards - 1997 plan		4			10
	Stock option awards - 2005 plan		5			7
	Performance awards (includes achievement shares for grants after 2013)		3			-
	Achievement shares from performance grants prior to 2013		3			-
	Time-vested awards		3			-
Stock option activity	The following table summarizes Trustmark’s stock option activity for the years ended December 31, 2014, 2013 and 2012:

		2014					2013					2012
	Options	Shares			Average		Shares			Average		Shares			Average
					Option					Option					Option
					Price					Price					Price
	Outstanding, beginning of year		105,450		$	27.43		699,600		$	27.58		1,205,100		$	27.31
	Exercised		-			-		(187,300	)		26.96		(11,125	)		24.09
	Expired		(105,450	)		27.43		(406,850	)		27.9		(494,375	)		27.01
	Outstanding, end of year		-			-		105,450		$	27.43		699,600		$	27.58

	Exercisable, end of year		-			-		105,450		$	27.43		699,600		$	27.58
Restricted stock grants	The following table summarizes Trustmark’s performance award activity for the years ended December 31, 2014, 2013 and 2012:

		2014					2013					2012
		Shares			Weighted-		Shares			Weighted-		Shares			Weighted-
					Average					Average					Average
					Grant-Date					Grant-Date					Grant-Date
					Fair Value					Fair Value					Fair Value
	Nonvested shares, beginning of year		160,520		$	25.2		159,583		$	24.26		179,421		$	20.3
	Granted		73,726			25.58		62,119			23.65		55,295			25.66
	Released from restriction		(38,580	)		25.4		(54,784	)		24.15		(72,632	)		21.38
	Forfeited		(14,471	)		24.86		(6,398	)		25.42		(2,501	)		24.7
	Nonvested shares, end of year		181,195		$	24.98		160,520		$	25.2		159,583		$	24.26
	The following table summarizes Trustmark’s time-vested award activity for the years ended December 31, 2014, 2013 and 2012:

		2014					2013					2012
		Shares			Weighted-		Shares			Weighted		Shares			Weighted
					Average					Average					Average
					Grant-Date					Grant-Date					Grant-Date
					Fair Value					Fair Value					Fair Value
	Nonvested shares, beginning of year		291,634		$	24.48		317,573		$	23.28		334,356		$	21.04
	Granted		105,690			24.91		112,964			24.47		141,616			24.66
	Released from restriction		(124,869	)		24.74		(122,727	)		24.4		(151,331	)		23.14
	Forfeited		(8,550	)		24.77		(16,176	)		25.14		(7,068	)		24.14
	Nonvested shares, end of year		263,905		$	24.66		291,634		$	24.48		317,573		$	23.28
Compensation expense for all stock and incentive plans	The following table presents information regarding compensation expense for all stock and incentive plans for the periods presented ($ in thousands):

		Recognized Compensation Expense								Unrecognized Compensation		Weighted
		for Years Ended December 31,										Average Life
												of Unrecognized
												Compensation
		2014			2013		2012			Expense		Expense
	Performance awards	$	1,065		$	825	$	868		$	1,197		1.73
	Time-vested awards		3,087			2,774		3,105			3,619		1.76
	Total	$	4,152		$	3,599	$	3,973		$	4,816

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
Commitments and Contingencies (Tables)	Dec. 31, 2014
Commitments and Contingencies [Abstract]
Future minimum rental commitments under noncancellable operating leases	At December 31, 2014, future minimum rental commitments under non-cancellable operating leases are as follows ($ in thousands):

	Year	Amount
	2015	$	6,010
	2016		4,034
	2017		3,568
	2018		3,140
	2019		2,585
	Thereafter		11,960
	Total	$	31,297

Shareholders_Equity_Tables

Shareholders' Equity (Tables)	12 Months Ended
Shareholders' Equity (Tables)	Dec. 31, 2014
Shareholders' Equity [Abstract]
Table of actual regulatory capital amounts and ratios	The following table provides Trustmark's and TNB's actual regulatory capital amounts and ratios for the periods presented under regulatory capital standards then in effect ($ in thousands):

														Minimum Regulatory
		Actual						Minimum Regulatory						Provision to be
		Regulatory Capital						Capital Required						Well-Capitalized
		Amount			Ratio			Amount			Ratio			Amount			Ratio
	At December 31, 2014:
	Total Capital (to Risk Weighted Assets)
	Trustmark Corporation	$	1,221,292			14.56	%	$	671,024			8	%		n/	a		n/	a
	Trustmark National Bank		1,198,697			14.32	%		669,856			8	%	$	837,320			10	%

	Tier 1 Capital (to Risk Weighted Assets)
	Trustmark Corporation	$	1,129,630			13.47	%	$	335,512			4	%		n/	a		n/	a
	Trustmark National Bank		1,108,399			13.24	%		334,928			4	%	$	502,392			6	%

	Tier 1 Capital (to Average Assets)
	Trustmark Corporation	$	1,129,630			9.63	%	$	469,411			4	%		n/	a		n/	a
	Trustmark National Bank		1,108,399			9.46	%		468,783			4	%	$	585,979			5	%

	At December 31, 2013:
	Total Capital (to Risk Weighted Assets)
	Trustmark Corporation	$	1,122,904			14.18	%	$	633,310			8	%		n/	a		n/	a
	Trustmark National Bank		1,076,391			13.74	%		626,672			8	%	$	783,340			10	%

	Tier 1 Capital (to Risk Weighted Assets)
	Trustmark Corporation	$	1,026,858			12.97	%	$	316,655			4	%		n/	a		n/	a
	Trustmark National Bank		982,925			12.55	%		313,336			4	%	$	470,004			6	%

	Tier 1 Capital (to Average Assets)
	Trustmark Corporation	$	1,026,858			9.06	%	$	453,487			4	%		n/	a		n/	a
	Trustmark National Bank		982,925			8.76	%		448,665			4	%	$	560,831			5	%
Components of accumulated other comprehensive (loss) income and the related tax effects	The following table presents the components of accumulated other comprehensive (loss) income and the related tax effects allocated to each component for the years ended December 31, 2014, 2013 and 2012 ($ in thousands). Reclassification adjustments related to securities available for sale are included in securities gains, net in the accompanying consolidated statements of income. The amortization of prior service cost, recognized net loss due to BancTrust termination, recognized net loss due to lump sum settlements and recognized net actuarial (loss) gain on pension and other postretirement benefit plans are included in the computation of net periodic benefit cost (see Note 15 – Defined Benefit and Other Postretirement Benefits for additional details). Reclassification adjustments related to the cash flow hedge derivative are included in other interest expense in the accompanying consolidated statements of income.

		Before Tax			Tax (Expense)			Net of Tax
		Amount			Benefit			Amount
	Year Ended December 31, 2014:
	Securities available for sale and transferred securities:
	Unrealized holding gains arising during the period	$	17,705		$	(6,772	)	$	10,933
	Reclassification adjustment for net gains realized in net income		(300	)		115			(185	)
	Change in net unrealized holding loss on securities transferred to held to maturity		6,010			(2,299	)		3,711
	Total securities available for sale and transferred securities		23,415			(8,956	)		14,459
	Pension and other postretirement benefit plans:
	Net change in prior service costs		249			(95	)		154
	Recognized net loss due to BancTrust termination		1,355			(518	)		837
	Recognized net loss due to lump sum settlements		905			(346	)		559
	Recognized net actuarial loss		(21,657	)		8,283			(13,374	)
	Total pension and other postretirement benefit plans		(19,148	)		7,324			(11,824	)
	Derivatives:
	Change in accumulated gain on effective cash flow hedge derivatives		(2,246	)		859			(1,387	)
	Reclassification adjustment for loss realized in net income		(2	)		1			(1	)
	Total cash flow hedge derivatives		(2,248	)		860			(1,388	)
	Total other comprehensive income	$	2,019		$	(772	)	$	1,247

	Year Ended December 31, 2013:
	Securities available for sale and transferred securities:
	Unrealized holding losses arising during the period	$	(67,135	)	$	25,679		$	(41,456	)
	Reclassification adjustment for net gains realized in net income		(485	)		186			(299	)
	Net unrealized holding loss on securities transferred to held to maturity		(46,383	)		17,741			(28,642	)
	Total securities available for sale and transferred securities		(114,003	)		43,606			(70,397	)
	Pension and other postretirement benefit plans:
	Net change in prior service costs		251			(96	)		155
	Recognized net loss due to lump sum settlement		2,225			(851	)		1,374
	Recognized net actuarial gain		32,742			(12,524	)		20,218
	Total pension and other postretirement benefit plans		35,218			(13,471	)		21,747
	Derivatives:
	Change in accumulated gain on effective cash flow hedge derivatives		2,468			(944	)		1,524
	Total other comprehensive loss	$	(76,317	)	$	29,191		$	(47,126	)

	Year Ended December 31, 2012:
	Securities available for sale:
	Unrealized holding gains arising during the period	$	97		$	(37	)	$	60
	Reclassification adjustment for net gains realized in net income		(1,059	)		405			(654	)
	Total securities available for sale		(962	)		368			(594	)
	Pension and other postretirement benefit plans:
	Net change in prior service costs		52			(20	)		32
	Recognized net actuarial gain		1,354			(518	)		836
	Total pension and other postretirement benefit plans		1,406			(538	)		868
	Total other comprehensive income	$	444		$	(170	)	$	274
Components of accumulated other comprehensive (loss) income	The following table presents the changes in the balances of each component of accumulated other comprehensive (loss) income for the years ended December 31, 2014, 2013 and 2012 ($ in thousands). All amounts are presented net of tax.

		Securities			Defined			Cash Flow Hedge Derivatives			Total
		Available for Sale			Benefit
		and Transferred Securities			Pension Items
	Balance at January 1, 2012	$	45,529		$	(42,408	)	$	-		$	3,121
	Other comprehensive income before reclassification		60			868			-			928
	Amounts reclassified from accumulated other comprehensive income		(654	)		-			-			(654	)
	Net other comprehensive (loss) income		(594	)		868			-			274
	Balance at December 31, 2012		44,935			(41,540	)		-			3,395
	Other comprehensive loss before reclassification		(70,098	)		21,747			1,524			(46,827	)
	Amounts reclassified from accumulated other comprehensive loss		(299	)		-			-			(299	)
	Net other comprehensive (loss) income		(70,397	)		21,747			1,524			(47,126	)
	Balance at December 31, 2013		(25,462	)		(19,793	)		1,524			(43,731	)
	Other comprehensive income before reclassification		14,644			(11,824	)		(1,387	)		1,433
	Amounts reclassified from accumulated other comprehensive loss		(185	)		-			(1	)		(186	)
	Net other comprehensive income (loss)		14,459			(11,824	)		(1,388	)		1,247
	Balance at December 31, 2014	$	(11,003	)	$	(31,617	)	$	136		$	(42,484	)

Fair_Value_Tables

Fair Value (Tables)	12 Months Ended
Fair Value (Tables)	Dec. 31, 2014
Fair Value [Abstract]
Financial assets and liabilities measured at fair value -recurring basis	The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of December 31, 2014 and 2013, segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value ($ in thousands). There were no transfers between fair value levels for the years ended December 31, 2014 and 2013.

			31-Dec-14
			Total			Level 1			Level 2		Level 3
	U.S. Treasury securities		$	100		$	-		$	100	$	-
	U.S. Government agency obligations			112,474			-			112,474		-
	Obligations of states and political subdivisions			162,258			-			162,258		-
	Mortgage-backed securities			2,068,035			-			2,068,035		-
	Asset-backed securities and structured financial products			31,700			-			31,700		-
	Securities available for sale			2,374,567			-			2,374,567		-
	Loans held for sale			132,196			-			132,196		-
	Mortgage servicing rights			64,358			-			-		64,358
	Other assets - derivatives			5,527			1,181			3,047		1,299
	Other liabilities - derivatives			4,338			490			3,848		-

			31-Dec-13
			Total			Level 1			Level 2		Level 3
	U.S. Treasury securities		$	502		$	-		$	502	$	-
	U.S. Government agency obligations			169,472			-			169,472		-
	Obligations of states and political subdivisions			171,738			-			171,738		-
	Mortgage-backed securities			1,788,505			-			1,788,505		-
	Asset-backed securities and structured financial products			63,937			-			63,937		-
	Securities available for sale			2,194,154			-			2,194,154		-
	Loans held for sale			149,169			-			149,169		-
	Mortgage servicing rights			67,834			-			-		67,834
	Other assets - derivatives			4,994			(2,579	)		7,447		126
	Other liabilities - derivatives			3,298			581			2,717		-
Changes in level 3 assets measured at fair value on a recurring basis	The changes in Level 3 assets measured at fair value on a recurring basis for the years ended December 31, 2014 and 2013 are summarized as follows ($ in thousands):

			MSR			Other Assets - Derivatives
	Balance, January 1, 2014		$	67,834		$	126
	Total net (losses) gains included in Mortgage banking, net (1)			(15,769	)		4,554
	Additions			12,293			-
	Sales			-			(3,381	)
	Balance, December 31, 2014		$	64,358		$	1,299

	The amount of total (losses) gains for the period included in		$	(7,202	)	$	587
	earnings that are attributable to the change in unrealized
	gains or losses still held at December 31, 2014

	Balance, January 1, 2013		$	47,341		$	2,284
	Total net gains included in Mortgage banking, net (1)			2,012			7,754
	Additions			18,481			-
	Sales			-			(9,912	)
	Balance, December 31, 2013		$	67,834		$	126

	The amount of total gains for the period included in		$	11,818		$	735
	earnings that are attributable to the change in unrealized
	gains or losses still held at December 31, 2013

	-1	Total net (losses) gains included in Mortgage banking, net relating to MSR includes changes in fair value due to market changes and due to runoff.
Carrying amounts and estimated fair values of financial instruments	The carrying amounts and estimated fair values of financial instruments at December 31, 2014 and 2013, were as follows ($ in thousands):

			2014						2013
			Carrying			Estimated			Carrying		Estimated
			Value			Fair Value			Value		Fair Value
	Financial Assets:
	Level 2 Inputs:
	Cash and short-term investments		$	317,858		$	317,858		$	353,014	$	353,014
	Securities held to maturity			1,170,685			1,182,846			1,168,728		1,150,833
	Level 3 Inputs:
	Net LHFI			6,379,853			6,453,618			5,732,433		5,787,408
	Net acquired loans			537,350			537,350			794,570		794,570
	FDIC indemnification asset			6,997			6,997			14,347		14,347

	Financial Liabilities:
	Level 2 Inputs:
	Deposits			9,698,358			9,702,864			9,859,902		9,866,118
	Short-term liabilities			868,620			868,620			317,972		317,972
	Long-term FHLB advances			1,253			1,263			8,458		8,474
	Subordinated notes			49,936			53,504			49,904		53,387
	Junior subordinated debt securities			61,856			46,392			61,856		40,206
Fair value and the contractual principal outstanding of the LHFS	The following table provides information about the fair value and the contractual principal outstanding of the LHFS accounted for under the fair value options as of December 31, 2014 ($ in thousands):

			31-Dec-14
	Fair value of LHFS		$	91,182
	LHFS contractual principal outstanding			88,106
	Fair value less unpaid principal		$	3,076

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Tables)	12 Months Ended
Derivative Financial Instruments (Tables)	Dec. 31, 2014
Derivative Financial Instruments [Abstract]
Fair value of derivative instruments	The following tables disclose the fair value of derivative instruments in Trustmark’s balance sheets as of December 31, 2014 and 2013 as well as the effect of these derivative instruments on Trustmark’s results of operations for the years ended December 31, 2014, 2013 and 2012 ($ in thousands):

			31-Dec-14			31-Dec-13
	Derivatives in hedging relationships
	Interest rate contracts:
	Interest rate swaps included in other assets		$	221		$	2,469
	Forward contracts included in other liabilities (1)			-			(1,911	)

	Derivatives not designated as hedging instruments
	Interest rate contracts:
	Futures contracts included in other assets		$	928		$	(2,662	)
	Exchange traded purchased options included in other assets			253			83
	OTC written options (rate locks) included in other assets			1,299			126
	Interest rate swaps included in other assets			2,804			4,962
	Credit risk participation agreements included in other assets			22			16
	Forward contracts included in other liabilities (1)			1,014			-
	Exchange traded written options included in other liabilities			490			581
	Interest rate swaps included in other liabilities			2,813			4,628
	Credit risk participation agreements included in other liabilities			21			-

	-1	At December 31, 2014, forward contracts were no longer designated as hedging.
Effects of derivative instruments on statements of operations			Years ended December 31,
			2014			2013			2012
	Derivatives in hedging relationships
	Amount of loss reclassified from accumulated other		$	(2	)	$	-		$	-
	comprehensive (loss) income and recognized in other interest expense		$	(2	)	$	-		$	-
	Amount of (loss) gain recognized in mortgage banking, net			(2,534	)		2,649			1,479

	Derivatives not designated as hedging instruments
	Amount of gain (loss) recognized in mortgage banking, net		$	11,038		$	(10,459	)	$	7,585
	Amount of (loss) gain recognized in bankcard and other fees			(223	)		290			(82	)
Schedule of amount included in other comprehensive loss for derivative instruments designated as hedges of cash flows	The following table discloses the amount included in other comprehensive income (loss) for derivative instruments designated as cash flow hedges for the years ended December 31, 2014, 2013 and 2012 ($ in thousands):

			Years Ended December 31,
			2014			2013			2012
	Derivatives in cash flow hedging relationship
	Amount of (loss) gain recognized in other comprehensive income (loss)		$	(1,387	)	$	1,524		$	-
Information about financial instruments that are eligible for offset in the consolidated balance sheets	Certain financial instruments, including resell and repurchase agreements, securities lending arrangements and derivatives, may be eligible for offset in the consolidated balance sheet and/or subject to master netting arrangements or similar agreements. Information about financial instruments that are eligible for offset in the consolidated balance sheets as of December 31, 2014 and 2013 is presented in the following tables ($ in thousands):

	Offsetting of Derivative Assets


	As of December 31, 2014

												Gross Amounts Not Offset in the Statement of Financial Position
			Gross			Gross Amounts			Net Amounts of			Financial Instruments			Cash Collateral Received			Net Amount
			Amounts of			Offset in the			Assets presented in
			Recognized			Statement of			the Statement of
			Assets			Financial Position			Financial Position
	Derivatives		$	3,025		$	-		$	3,025		$	(347	)	$	-		$	2,678

	Offsetting of Derivative Liabilities


	As of December 31, 2014

												Gross Amounts Not Offset in the Statement of Financial Position
			Gross Amounts of Recognized Liabilities			Gross Amounts			Net Amounts of			Financial Instruments			Cash Collateral			Net Amount
						Offset in the			Liabilities presented						Posted
						Statement of			in the Statement of
						Financial Position			Financial Position
	Derivatives		$	2,813		$	-		$	2,813		$	(347	)	$	-		$	2,466

	Offsetting of Derivative Assets


	As of December 31, 2013

												Gross Amounts Not Offset in the Statement of Financial Position
			Gross Amounts of Recognized Assets			Gross Amounts			Net Amounts of			Financial Instruments			Cash Collateral			Net Amount
						Offset in the			Assets presented in						Received
						Statement of			the Statement of
						Financial Position			Financial Position
	Derivatives		$	7,431		$	-		$	7,431		$	(967	)	$	(1,920	)	$	4,544

	Offsetting of Derivative Liabilities


	As of December 31, 2013

												Gross Amounts Not Offset in the Statement of Financial Position
			Gross Amounts of Recognized Liabilities			Gross Amounts			Net Amounts of			Financial Instruments			Cash Collateral			Net Amount
						Offset in the			Liabilities presented						Posted
						Statement of			in the Statement of
						Financial Position			Financial Position
	Derivatives		$	4,628		$	-		$	4,628		$	(967	)	$	-		$	3,661

Segment_Information_Tables

Segment Information (Tables)	12 Months Ended
Segment Information (Tables)	Dec. 31, 2014
Segment Information [Abstract]
Schedule of Segment Information	The following table discloses financial information by reportable segment for the years ended December 31, 2014, 2013 and 2012 ($ in thousands):

		Years Ended December 31,
		2014		2013			2012
	General Banking
	Net interest income	$	404,214	$	387,586		$	340,130
	Provision for loan losses, net		7,382		(7,382	)		12,294
	Noninterest income		107,457		113,571			122,565
	Noninterest expense		355,693		367,031			302,234
	Income before income taxes		148,596		141,508			148,167
	Income taxes		33,726		32,499			38,079
	General banking net income	$	114,870	$	109,009		$	110,088

	Selected Financial Information
	Average assets	$	11,958,078	$	11,463,789		$	9,737,230
	Depreciation and amortization	$	35,038	$	35,971		$	27,886

	Wealth Management
	Net interest income	$	851	$	582		$	559
	Noninterest income		32,209		29,446			24,421
	Noninterest expense		26,733		24,713			20,916
	Income before income taxes		6,327		5,315			4,064
	Income taxes		2,105		1,754			1,354
	Wealth Management net income	$	4,222	$	3,561		$	2,710

	Selected Financial Information
	Average assets	$	1,504	$	304		$	261
	Depreciation and amortization	$	190	$	157		$	164

	Insurance
	Net interest income	$	271	$	319		$	301
	Noninterest income		33,476		30,842			28,203
	Noninterest expense		26,579		23,987			21,352
	Income before income taxes		7,168		7,174			7,152
	Income taxes		2,698		2,684			2,667
	Insurance net income	$	4,470	$	4,490		$	4,485

	Selected Financial Information
	Average assets	$	68,448	$	66,876		$	65,560
	Depreciation and amortization	$	844	$	1,025		$	1,225

	Consolidated
	Net interest income	$	405,336	$	388,487		$	340,990
	Provision for loan losses, net		7,382		(7,382	)		12,294
	Noninterest income		173,142		173,859			175,189
	Noninterest expense		409,005		415,731			344,502
	Income before income taxes		162,091		153,997			159,383
	Income taxes		38,529		36,937			42,100
	Consolidated net income	$	123,562	$	117,060		$	117,283

	Selected Financial Information
	Average assets	$	12,028,030	$	11,530,969		$	9,803,051
	Depreciation and amortization	$	36,072	$	37,153		$	29,275

Parent_Company_Only_Financial_1

Parent Company Only Financial Information (Tables)	12 Months Ended
Parent Company Only Financial Information (Tables)	Dec. 31, 2014
Parent Company Only Financial Information [Abstract]
Parent Only Financial Statements	Condensed Balance Sheets	December 31,
	Assets:	2014			2013
	Investment in banks	$	1,463,676		$	1,394,250
	Other assets		18,663			25,314
	Total Assets	$	1,482,339		$	1,419,564

	Liabilities and Shareholders' Equity:
	Accrued expense	$	543		$	2,755
	Junior subordinated debt securities		61,856			61,856
	Shareholders' equity		1,419,940			1,354,953
	Total Liabilities and Shareholders' Equity	$	1,482,339		$	1,419,564

	Condensed Statements of Income	Years Ended December 31,
	Revenue:	2014			2013			2012
	Dividends received from banks	$	64,351		$	64,155		$	72,216
	Earnings of subsidiaries over distributions		60,783			54,195			46,220
	Other income		55			64			59
	Total Revenue		125,189			118,414			118,495
	Expense:
	Other expense		1,627			1,354			1,212
	Total Expense		1,627			1,354			1,212
	Net Income	$	123,562		$	117,060		$	117,283

	Condensed Statements of Cash Flows	Years Ended December 31,
	Operating Activities:	2014			2013			2012
	Net income	$	123,562		$	117,060		$	117,283
	Adjustments to reconcile net income to net cash provided by operating activities:
	Increase in investment in subsidiaries		(60,783	)		(54,195	)		(46,220	)
	Other		(2,158	)		962			(376	)
	Net cash provided by operating activities		60,621			63,827			70,687

	Investing Activities:
	Payment for investments in subsidiaries		-			(73,263	)		(10,003	)
	Repayment for investments in subsidiaries		-			106,000			-
	Net cash provided by (used in) investing activities		-			32,737			(10,003	)

	Financing Activities:
	Repayments of advances from subsidiaries		-			(33,000	)		-
	Cash dividends paid on common stock		(62,474	)		(62,276	)		(59,961	)
	Other common stock transactions, net		(1,502	)		2,832			(1,237	)
	Net cash used in financing activities		(63,976	)		(92,444	)		(61,198	)
	(Decrease) increase in cash and cash equivalents		(3,355	)		4,120			(514	)
	Cash and cash equivalents at beginning of year		21,776			17,656			18,170
	Cash and cash equivalents at end of year	$	18,421		$	21,776		$	17,656

Significant_Accounting_Policie3

Significant Accounting Policies (Details) (USD $)	12 Months Ended
Share data in Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
	Factor
	Region
	Office
Business [Abstract]
Number of offices	205
Loans Held-for-sale [Abstract]
Percentage of remaining principal balance of the loan servicer may repurchase (in hundredths)	100.00%
Loans Held for Sale [Abstract]
Number of days loan is contractually past due to be classified as a past due loan	30 days
Balance of commercial nonaccrual loans identified for impairment analysis, minimum	$500,000
Allowance for loan losses [Abstract]
Methodology elements in allowance for loan losses guidance	3
Key market regions	5
Goodwill and Identifiable Intangible Assets [Abstract]
Finite-lived intangible assets, average useful life	20 years
Federal Home Loan Bank and Federal Reserve stock
Securities with limited marketability	44,100,000		28,400,000
Statement of cash flows specific transaction amounts [Abstract]
Income taxes paid	13,710,000		14,520,000		57,834,000
Interest expense paid on deposits and borrowings	22,268,000		25,715,000		31,496,000
Noncash transfers from loans to foreclosed properties	39,778,000	[1]	41,042,000	[1]	37,635,000	[1]
Transfer of long-term FHLB advances to short-term	6,644,000		0		0
Assets acquired in business combination	0		1,845,543,000		234,960,000
Liabilities assumed in business combination	0		1,821,066,000		209,322,000
Statement [Line Items]
Net cash provided by operating activities	211,267,000		301,183,000		112,277,000
Net cash provided by (used in) investing activities	-556,255,000		-258,967,000		173,739,000
Net cash provided by (used in) financing activities	315,200,000		72,056,000		-257,152,000
(Decrease) increase in cash and cash equivalents	-29,788,000		114,272,000		28,864,000
Cash and cash equivalents at beginning of year	345,761,000		231,489,000		202,625,000
Cash and cash equivalents at end of year	315,973,000		345,761,000		231,489,000
Weighted-average shares used to calculate basic and diluted EPS [Abstract]
Basic shares (in shares)	67,434		66,897		64,659
Dilutive shares (in shares)	160		176		192
Diluted shares (in shares)	67,594		67,073		64,851
Weighted-average antidilutive stock awards (in shares)	32		333		653
Designated as Hedging Instrument [Member] \| Interest Rate Swap [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Variable interest rate, description	three-month LIBOR
Period for which cash flow hedges will be used to hedge quarterly interest payments	5 years
As Reported [Member]
Statement [Line Items]
Net cash provided by operating activities			155,417,000		92,125,000
Net cash provided by (used in) investing activities			-113,201,000		193,891,000
Net cash provided by (used in) financing activities			72,056,000		-257,152,000
(Decrease) increase in cash and cash equivalents			114,272,000		28,864,000
Cash and cash equivalents at beginning of year			231,489,000		202,625,000
Cash and cash equivalents at end of year			345,761,000		231,489,000
Adjustment [Member]
Statement [Line Items]
Net cash provided by operating activities			145,766,000		20,152,000
Net cash provided by (used in) investing activities			-145,766,000		-20,152,000
Net cash provided by (used in) financing activities			0		0
(Decrease) increase in cash and cash equivalents			0		0
Cash and cash equivalents at beginning of year			0		0
Cash and cash equivalents at end of year			$0		$0
Maximum [Member]
Loans Held for Sale [Abstract]
Number of days mortgage LHFS are retained on Trustmark's balance sheet	45 days
Maximum [Member] \| Buildings [Member]
Premises and Equipment, Net [Abstract]
Estimated useful lives of the assets	39 years
Maximum [Member] \| Furniture and Equipment [Member]
Premises and Equipment, Net [Abstract]
Estimated useful lives of the assets	10 years
Minimum [Member]
Loans Held for Sale [Abstract]
Number of days mortgage LHFS are retained on Trustmark's balance sheet	30 days
Minimum [Member] \| Furniture and Equipment [Member]
Premises and Equipment, Net [Abstract]
Estimated useful lives of the assets	3 years
Commercial Credits [Member]
Loans Held for Investment [Abstract]
Number of days past due on credits for loan to be classified as nonaccrual	90 days
Non-Business Purpose Credits [Member]
Loans Held for Investment [Abstract]
Number of days past due on credits for loan to be classified as nonaccrual	120 days
Consumer Loans [Member]
Loans Held for Investment [Abstract]
Number of days past due loans are generally charged-off	180 days
Non-real Estate Consumer Purpose Loans [Member]
Loans Held for Investment [Abstract]
Number of days past due loans are generally charged-off	120 days
Credit Card Loans [Member]
Loans Held for Investment [Abstract]
Number of days past due loans are generally charged-off	180 days

[1]	Includes transfers from covered loans to foreclosed properties.

Business_Combinations_Details

Business Combinations (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jul. 26, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Branch
Business Acquisition [Line Items]
Total Assets	$0	$1,845,543	$234,960
Somerville Bank & Trust Company [Member]
Business Acquisition [Line Items]
Number of branches acquired	5
Total Assets	219,600
Oxford, Mississippi Branches [Member]
Business Acquisition [Line Items]
Number of branches acquired				2
Deposits				$11,700

Business_Combinations_BancTrus

Business Combinations, BancTrust Financial Group (Details) (USD $)	3 Months Ended	12 Months Ended	0 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2014	Feb. 15, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Decrease in goodwill with a corresponding increase in deferred tax asset as measurement period adjustment	$7,400,000
Assets [Abstract]
Total Assets		0		1,845,543,000	1,845,543,000	234,960,000
Liabilities [Abstract]
Total Liabilities		0		1,821,066,000	1,821,066,000	209,322,000
Goodwill		365,500,000		372,851,000	372,851,000	291,104,000
Amortization period of acquired intangible asset		20 years
BancTrust Financial Group, Inc. [Member]
Business Acquisition [Line Items]
Age of acquired entity			26 years
Preferred stock and warrants repurchased			50,000,000
Issued value of preferred stock associated warrant under capital purchase program			52,600,000
Equity issued, per share of acquired company (in shares)			0.125
Decrease in acquired non covered loans as measurement period adjustment				6,800,000	6,800,000
Decrease in Premises and equipment as measurement period adjustment					627,000
Decrease in other real estate as measurement period adjustment					2,600,000
Increase in deferred tax asset as measurement period adjustment					3,400,000
Increase in goodwill as measurement period adjustment					6,300,000
Transfer to other real estate as measurement period adjustment					1,600,000
Assets [Abstract]
Cash and due from banks			141,616,000
Securities available for sale			528,016,000
Loans held for sale			1,050,000
Acquired noncovered loans			944,235,000
Premises and equipment, net			54,952,000
Identifiable intangible assets			33,498,000
Other real estate			40,103,000
Other assets			109,423,000
Total Assets			1,852,893,000
Liabilities [Abstract]
Deposits			1,740,254,000
Other borrowings			64,051,000
Other liabilities			16,761,000
Total Liabilities			1,821,066,000
Net identified assets acquired at fair value			31,827,000
Goodwill			74,247,000
Equity issued (in shares)			2,240,000
Business acquisition, equity issued, value assigned			53,500,000
Business acquisition, closing stock price (in dollars per share)			$23.83
Number of markets entered due to acquisition		15
Amortization period of acquired intangible asset		10 years
Net assets acquired at fair value			106,074,000
Business acquisition, total transaction expenses					9,400,000
Business acquisition, severance expense					1,400,000
Business acquisition, contract termination and other expenses					$7,900,000

Business_Combinations_Bay_Bank

Business Combinations, (Bay Bank and Trust Company) (Details) (USD $)	12 Months Ended			0 Months Ended	3 Months Ended
Share data in Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 16, 2012	Jun. 30, 2012	Mar. 31, 2012
Assets:
Total Assets	$0	$1,845,543,000	$234,960,000
Liabilities:
Total Liabilities	0	1,821,066,000	209,322,000
Bargain purchase gain	0	0	3,635,000
Amortization period of acquired intangible asset	20 years
Bay Bank and Trust Company [Member]
Business Acquisition [Line Items]
Age of acquired entity				76 years
Business acquisition, cost of acquired entity, cash paid				10,000,000
Business acquisition, equity issued (in shares)				510
Business acquisition, equity issued, value assigned				12,000,000
Assets:
Cash and due from banks				88,154,000
Securities available for sale				26,369,000
Acquired noncovered loans				97,914,000
Premises and equipment, net				9,466,000
Identifiable intangible assets				7,017,000
Other real estate				2,569,000
Other assets				3,471,000
Total Assets				234,960,000
Liabilities:
Deposits				208,796,000
Other liabilities				526,000
Total Liabilities				209,322,000
Net assets acquired at fair value				25,638,000
Consideration paid to Bay Bank				22,003,000
Bargain purchase gain				3,635,000	881,000	2,800,000
Income taxes				0
Bargain purchase gain, net of taxes				3,635,000
Business acquisition, total transaction expenses						2,600,000
Business acquisition, severance expense						672,000
Business acquisition, contract termination and other expenses						$1,900,000
Amortization period of acquired intangible asset						10 years

Cash_and_Due_from_Banks_Detail

Cash and Due from Banks (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Cash and Due from Banks [Abstract]
Average reserve balances with Federal Reserve Bank	$75.60	$57.60

Securities_Available_for_Sale_2

Securities Available for Sale and Held to Maturity (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Securities available for sale [Abstract]
Amortized cost	$2,352,013	$2,189,005
Gross unrealized gains	34,131	31,979
Gross unrealized (losses)	-11,577	-26,830
Estimated fair value	2,374,567	2,194,154
Securities held to maturity [Abstract]
Amortized cost	1,170,685	1,168,728
Gross unrealized gains	15,156	3,063
Gross unrealized (losses)	-2,995	-20,958
Estimated fair value	1,182,846	1,150,833
US Treasury Securities [Member]
Securities held to maturity [Abstract]
Amortized cost	0	0
Gross unrealized gains	0	0
Gross unrealized (losses)	0	0
Estimated fair value	0	0
U.S. Government Agency Obligations Issued by U.S. Government Agencies [Member]
Securities held to maturity [Abstract]
Amortized cost	0	0
Gross unrealized gains	0	0
Gross unrealized (losses)	0	0
Estimated fair value	0	0
U.S. Government Agency Obligations Issued by U.S. Government Sponsored Agencies [Member]
Securities held to maturity [Abstract]
Amortized cost	100,971	100,159
Gross unrealized gains	2,631	0
Gross unrealized (losses)	0	-1,580
Estimated fair value	103,602	98,579
Obligations of States and Political Subdivisions [Member]
Securities held to maturity [Abstract]
Amortized cost	63,505	65,987
Gross unrealized gains	3,398	2,806
Gross unrealized (losses)	0	-281
Estimated fair value	66,903	68,512
Residential Mortgage Pass-Through Securities Guaranteed by GNMA [Member]
Securities held to maturity [Abstract]
Amortized cost	19,115	9,433
Gross unrealized gains	466	142
Gross unrealized (losses)	-16	-72
Estimated fair value	19,565	9,503
Residential Mortgage Pass-Through Securities Issued by FNMA and FHLMC [Member]
Securities held to maturity [Abstract]
Amortized cost	11,437	12,724
Gross unrealized gains	471	30
Gross unrealized (losses)	0	-162
Estimated fair value	11,908	12,592
Other Residential Mortgage-Backed Securities Issued or Guaranteed by FNMA, FHLMC or GNMA [Member]
Securities held to maturity [Abstract]
Amortized cost	834,176	837,393
Gross unrealized gains	6,440	0
Gross unrealized (losses)	-1,916	-15,072
Estimated fair value	838,700	822,321
Commercial Mortgage-Backed Securities Issued or Guaranteed by FNMA, FHLMC or GNMA [Member]
Securities held to maturity [Abstract]
Amortized cost	141,481	143,032
Gross unrealized gains	1,750	85
Gross unrealized (losses)	-1,063	-3,791
Estimated fair value	142,168	139,326
Asset-Backed Securities and Structured Financial Products [Member]
Securities held to maturity [Abstract]
Amortized cost	0	0
Gross unrealized gains	0	0
Gross unrealized (losses)	0	0
Estimated fair value	0	0
US Treasury Securities [Member]
Securities available for sale [Abstract]
Amortized cost	100	501
Gross unrealized gains	0	1
Gross unrealized (losses)	0	0
Estimated fair value	100	502
U.S. Government Agency Obligations Issued by U.S. Government Agencies [Member]
Securities available for sale [Abstract]
Amortized cost	79,788	129,653
Gross unrealized gains	694	1,125
Gross unrealized (losses)	-826	-1,485
Estimated fair value	79,656	129,293
U.S. Government Agency Obligations Issued by U.S. Government Sponsored Agencies [Member]
Securities available for sale [Abstract]
Amortized cost	32,725	40,681
Gross unrealized gains	170	19
Gross unrealized (losses)	-77	-521
Estimated fair value	32,818	40,179
Obligations of States and Political Subdivisions [Member]
Securities available for sale [Abstract]
Amortized cost	157,001	165,810
Gross unrealized gains	5,325	6,243
Gross unrealized (losses)	-68	-315
Estimated fair value	162,258	171,738
Residential Mortgage Pass-Through Securities Guaranteed by GNMA [Member]
Securities available for sale [Abstract]
Amortized cost	11,897	14,099
Gross unrealized gains	544	459
Gross unrealized (losses)	-14	-84
Estimated fair value	12,427	14,474
Residential Mortgage Pass-Through Securities Issued by FNMA and FHLMC [Member]
Securities available for sale [Abstract]
Amortized cost	199,599	239,880
Gross unrealized gains	4,842	3,147
Gross unrealized (losses)	0	-1,909
Estimated fair value	204,441	241,118
Other Residential Mortgage-Backed Securities Issued or Guaranteed by FNMA, FHLMC or GNMA [Member]
Securities available for sale [Abstract]
Amortized cost	1,655,733	1,300,375
Gross unrealized gains	16,664	12,459
Gross unrealized (losses)	-10,564	-22,093
Estimated fair value	1,661,833	1,290,741
Commercial Mortgage-Backed Securities Issued or Guaranteed by FNMA, FHLMC or GNMA [Member]
Securities available for sale [Abstract]
Amortized cost	184,394	235,317
Gross unrealized gains	4,968	7,278
Gross unrealized (losses)	-28	-423
Estimated fair value	189,334	242,172
Asset-Backed Securities and Structured Financial Products [Member]
Securities available for sale [Abstract]
Amortized cost	30,776	62,689
Gross unrealized gains	924	1,248
Gross unrealized (losses)	0	0
Estimated fair value	$31,700	$63,937

Securities_Available_for_Sale_3

Securities Available for Sale and Held to Maturity (1) (Details) (USD $)	3 Months Ended	12 Months Ended			3 Months Ended
	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2014
Estimated fair value [Abstract]
Estimated fair value, less than 12 months	$2,108,340,000	$590,965,000	$2,108,340,000
Estimated fair value, 12 months or more	24,415,000	522,230,000	24,415,000
Total estimated fair value	2,132,755,000	1,113,195,000	2,132,755,000
Gross unrealized losses [Abstract]
Gross unrealized (losses), less than 12 months	-47,362,000	-2,663,000	-47,362,000
Gross unrealized (losses), 12 months or more	-426,000	-11,909,000	-426,000
Total gross unrealized (losses)	-47,788,000	-14,572,000	-47,788,000
Gains (losses) on investments [Abstract]
Gross realized (losses)		300,000	485,000	1,059,000
Pledged to collateralize public deposits and securities sold under repurchase agreements and for other purposes as permitted by law	2,475,000,000	2,457,000,000	2,475,000,000
Pledged securities providing additional contingency funding		6,000,000
Available for Sale, amortized cost [Abstract]
Due in one year or less		18,088,000
Due after one year through five years		137,976,000
Due after five years through ten years		61,738,000
Due after ten years		82,588,000
Total amortized cost, before mortgage-backed-securities		300,390,000
Mortgage-backed securities		2,051,623,000
Securities available for sale (at amortized cost)		2,352,013,000
Available for Sale, estimated fair value [Abstract]
Due in one year or less		18,236,000
Due after one year through five years		142,016,000
Due after five years through ten years		63,811,000
Due after ten years		82,469,000
Total fair value, before mortgage-backed-securities		306,532,000
Mortgage-backed securities		2,068,035,000
Securities available for sale (at fair value)	2,194,154,000	2,374,567,000	2,194,154,000
Held to maturity, amortized cost [Abstract]
Due in one year or less		2,496,000
Due after one year through five years		11,693,000
Due after five years through ten years		137,991,000
Due after ten years		12,296,000
Total amortized cost, before mortgage-backed-securities		164,476,000
Mortgage-backed securities		1,006,209,000
Securities held to maturity (at amortized cost)	1,168,728,000	1,170,685,000	1,168,728,000
Held to maturity, estimated fair value [Abstract]
Due in one year or less		2,513,000
Due after one year through five years		12,298,000
Due after five years through ten years		142,604,000
Due after ten years		13,090,000
Total fair value, before mortgage-backed-securities		170,505,000
Mortgage-backed securities		1,012,341,000
Securities held to maturity (at fair value)	1,150,833,000	1,182,846,000	1,150,833,000
Reclassification of Securities available for sale to securities held to maturity	1,099,000,000
Net unrealized holding loss on AFS Securities at date of transfer	46,600,000
Net unrealized holding loss on AFS Securities, net of tax at date of transfer	28,800,000
Net unamortized, unrealized loss on transfer of securities		40,400,000
Net unamortized, unrealized loss on transfer of securities, net of tax		24,900,000
Other-than-temporary impairments		0	0	0
Available-for-sale Securities [Member]
Gains (losses) on investments [Abstract]
Proceeds from calls and sales of securities		56,815,000	224,853,000	38,364,000
Gross realized gains		456,000	1,680,000	1,052,000
Gross realized (losses)		-156,000	-1,195,000	-2,000
Held-to-maturity Securities [Member]
Gains (losses) on investments [Abstract]
Proceeds from calls and sales of securities		0	0	335,000
Gross realized gains		0	0	9,000
U.S. Government Agency Obligations Issued by U.S. Government Agencies [Member]
Estimated fair value [Abstract]
Estimated fair value, less than 12 months	68,908,000	19,220,000	68,908,000
Estimated fair value, 12 months or more	0	32,656,000	0
Total estimated fair value	68,908,000	51,876,000	68,908,000
Gross unrealized losses [Abstract]
Gross unrealized (losses), less than 12 months	-1,485,000	-115,000	-1,485,000
Gross unrealized (losses), 12 months or more	0	-711,000	0
Total gross unrealized (losses)	-1,485,000	-826,000	-1,485,000
Held to maturity, amortized cost [Abstract]
Securities held to maturity (at amortized cost)	0	0	0
Held to maturity, estimated fair value [Abstract]
Securities held to maturity (at fair value)	0	0	0
U.S. Government Agency Obligations Issued by U.S. Government Sponsored Agencies [Member]
Estimated fair value [Abstract]
Estimated fair value, less than 12 months	138,478,000	9,948,000	138,478,000
Estimated fair value, 12 months or more	0	9,956,000	0
Total estimated fair value	138,478,000	19,904,000	138,478,000
Gross unrealized losses [Abstract]
Gross unrealized (losses), less than 12 months	-2,101,000	-52,000	-2,101,000
Gross unrealized (losses), 12 months or more	0	-25,000	0
Total gross unrealized (losses)	-2,101,000	-77,000	-2,101,000
Held to maturity, amortized cost [Abstract]
Securities held to maturity (at amortized cost)	100,159,000	100,971,000	100,159,000
Held to maturity, estimated fair value [Abstract]
Securities held to maturity (at fair value)	98,579,000	103,602,000	98,579,000
Obligations of States and Political Subdivisions [Member]
Estimated fair value [Abstract]
Estimated fair value, less than 12 months	55,963,000	8,431,000	55,963,000
Estimated fair value, 12 months or more	796,000	3,800,000	796,000
Total estimated fair value	56,759,000	12,231,000	56,759,000
Gross unrealized losses [Abstract]
Gross unrealized (losses), less than 12 months	-586,000	-22,000	-586,000
Gross unrealized (losses), 12 months or more	-10,000	-46,000	-10,000
Total gross unrealized (losses)	-596,000	-68,000	-596,000
Held to maturity, amortized cost [Abstract]
Securities held to maturity (at amortized cost)	65,987,000	63,505,000	65,987,000
Held to maturity, estimated fair value [Abstract]
Securities held to maturity (at fair value)	68,512,000	66,903,000	68,512,000
Residential Mortgage Pass-Through Securities Guaranteed by GNMA [Member]
Estimated fair value [Abstract]
Estimated fair value, less than 12 months	14,732,000	7,199,000	14,732,000
Estimated fair value, 12 months or more	161,000	647,000	161,000
Total estimated fair value	14,893,000	7,846,000	14,893,000
Gross unrealized losses [Abstract]
Gross unrealized (losses), less than 12 months	-155,000	-22,000	-155,000
Gross unrealized (losses), 12 months or more	-1,000	-8,000	-1,000
Total gross unrealized (losses)	-156,000	-30,000	-156,000
Held to maturity, amortized cost [Abstract]
Securities held to maturity (at amortized cost)	9,433,000	19,115,000	9,433,000
Held to maturity, estimated fair value [Abstract]
Securities held to maturity (at fair value)	9,503,000	19,565,000	9,503,000
Residential Mortgage Pass-Through Securities Issued by FNMA and FHLMC [Member]
Estimated fair value [Abstract]
Estimated fair value, less than 12 months	118,466,000		118,466,000
Estimated fair value, 12 months or more	0		0
Total estimated fair value	118,466,000		118,466,000
Gross unrealized losses [Abstract]
Gross unrealized (losses), less than 12 months	-2,071,000		-2,071,000
Gross unrealized (losses), 12 months or more	0		0
Total gross unrealized (losses)	-2,071,000		-2,071,000
Held to maturity, amortized cost [Abstract]
Securities held to maturity (at amortized cost)	12,724,000	11,437,000	12,724,000
Held to maturity, estimated fair value [Abstract]
Securities held to maturity (at fair value)	12,592,000	11,908,000	12,592,000
Other Residential Mortgage-Backed Securities Issued or Guaranteed by FNMA, FHLMC or GNMA [Member]
Estimated fair value [Abstract]
Estimated fair value, less than 12 months	1,534,381,000	537,033,000	1,534,381,000
Estimated fair value, 12 months or more	23,458,000	395,342,000	23,458,000
Total estimated fair value	1,557,839,000	932,375,000	1,557,839,000
Gross unrealized losses [Abstract]
Gross unrealized (losses), less than 12 months	-36,750,000	-2,449,000	-36,750,000
Gross unrealized (losses), 12 months or more	-415,000	-10,031,000	-415,000
Total gross unrealized (losses)	-37,165,000	-12,480,000	-37,165,000
Held to maturity, amortized cost [Abstract]
Securities held to maturity (at amortized cost)	837,393,000	834,176,000	837,393,000
Held to maturity, estimated fair value [Abstract]
Securities held to maturity (at fair value)	822,321,000	838,700,000	822,321,000
Commercial Mortgage-Backed Securities Issued or Guaranteed by FNMA, FHLMC or GNMA [Member]
Estimated fair value [Abstract]
Estimated fair value, less than 12 months	177,412,000	9,134,000	177,412,000
Estimated fair value, 12 months or more	0	79,829,000	0
Total estimated fair value	177,412,000	88,963,000	177,412,000
Gross unrealized losses [Abstract]
Gross unrealized (losses), less than 12 months	-4,214,000	-3,000	-4,214,000
Gross unrealized (losses), 12 months or more	0	-1,088,000	0
Total gross unrealized (losses)	-4,214,000	-1,091,000	-4,214,000
Held to maturity, amortized cost [Abstract]
Securities held to maturity (at amortized cost)	143,032,000	141,481,000	143,032,000
Held to maturity, estimated fair value [Abstract]
Securities held to maturity (at fair value)	139,326,000	142,168,000	139,326,000
Asset-Backed Securities and Structured Financial Products [Member]
Held to maturity, amortized cost [Abstract]
Securities held to maturity (at amortized cost)	0	0	0
Held to maturity, estimated fair value [Abstract]
Securities held to maturity (at fair value)	0	0	0
Collateralized Loan Obligations [Member]
Gross unrealized losses [Abstract]
Sale of collateralized loan obligations	135,600,000
Net gain on sale of collateralized loan obligations	1,300,000				389,000
Collateralized loan obligations sold during the first quarter of 2014					$25,900,000

Loans_Held_for_Investment_LHFI2

Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Loan Portfolio [Abstract]
Total LHFI	$6,449,469	$5,798,881
Less Allowance For Loan Losses, LHFI	69,616	66,448	78,738	89,518
Net LHFI	6,379,853	5,732,433
Loans and Leases Receivable, Other Information [Abstract]
LHFI, Individually Evaluated For Impairment	79,343	65,238
LHFI, Collectively Evaluated For Impairment	6,370,126	5,733,643
Total LHFI	6,449,469	5,798,881
Loans Secured by Real Estate [Member] \| Construction, Land Development and Other Land [Member]
Loan Portfolio [Abstract]
Total LHFI	619,877	596,889
Loans and Leases Receivable, Other Information [Abstract]
LHFI, Individually Evaluated For Impairment	13,867	13,327
LHFI, Collectively Evaluated For Impairment	606,010	583,562
Total LHFI	619,877	596,889
Loans Secured by Real Estate [Member] \| Secured by 1-4 Family Residential Properties [Member]
Loan Portfolio [Abstract]
Total LHFI	1,634,397	1,485,564
Loans and Leases Receivable, Other Information [Abstract]
LHFI, Individually Evaluated For Impairment	25,621	21,603
LHFI, Collectively Evaluated For Impairment	1,608,776	1,463,961
Total LHFI	1,634,397	1,485,564
Loans Secured by Real Estate [Member] \| Nonfarm, Nonresidential Properties [Member]
Loan Portfolio [Abstract]
Total LHFI	1,553,193	1,415,139
Loans and Leases Receivable, Other Information [Abstract]
LHFI, Individually Evaluated For Impairment	25,717	21,809
LHFI, Collectively Evaluated For Impairment	1,527,476	1,393,330
Total LHFI	1,553,193	1,415,139
Loans Secured by Real Estate [Member] \| Other Real Estate Properties [Member]
Loan Portfolio [Abstract]
Total LHFI	253,787	189,362
Loans and Leases Receivable, Other Information [Abstract]
LHFI, Individually Evaluated For Impairment	1,318	1,327
LHFI, Collectively Evaluated For Impairment	252,469	188,035
Total LHFI	253,787	189,362
Commercial and Industrial Loans [Member]
Loan Portfolio [Abstract]
Total LHFI	1,270,350	1,157,614
Loans and Leases Receivable, Other Information [Abstract]
LHFI, Individually Evaluated For Impairment	12,104	6,286
LHFI, Collectively Evaluated For Impairment	1,258,246	1,151,328
Total LHFI	1,270,350	1,157,614
Consumer Loans [Member]
Loan Portfolio [Abstract]
Total LHFI	167,964	165,308
Loans and Leases Receivable, Other Information [Abstract]
LHFI, Individually Evaluated For Impairment	88	151
LHFI, Collectively Evaluated For Impairment	167,876	165,157
Total LHFI	167,964	165,308
Other Loans [Member]
Loan Portfolio [Abstract]
Total LHFI	949,901	789,005
Loans and Leases Receivable, Other Information [Abstract]
LHFI, Individually Evaluated For Impairment	628	735
LHFI, Collectively Evaluated For Impairment	949,273	788,270
Total LHFI	$949,901	$789,005

Loans_Held_for_Investment_LHFI3

Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI (1) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	Region	Dec. 31, 2013	Dec. 31, 2012
Loan and Lease Receivables, Impaired [Abstract]
Unpaid Principal Balance	$96,365,000	$86,982,000
Total LHFI With No Related Allowance Recorded	23,135,000	25,643,000
Total LHFI With an Allowance Recorded	56,208,000	39,595,000
Total Carrying Amount	79,343,000	65,238,000
Related Allowance	12,764,000	5,181,000
Average Recorded Investment	72,291,000	73,800,000
Maximum Concentration Of Loan as a Percentage of Total LHFI (in hundredths)	10.00%
Key market regions	5
Loans and Leases Receivable, Related Parties	95,200,000	89,000,000
New loan advances to related party	643,100,000
Loan repayment by related party	636,500,000
Loan decreases from changes in executive officers and directors	372,000
Carrying amounts of nonaccrual LHFI considered for impairment analysis	79,300,000	65,200,000
Minimum loan amount for loan to be individually assessed for impairment	500,000
Nonaccrual Financing Receivable, Specifically Evaluated For Impairment	47,100,000	31,600,000
Nonaccrual Financing Receivable, Allowance for Credit Losses, Specifically Evaluated For Impairment	11,300,000	2,200,000
Nonaccrual Financing Receivable, Allowance For Credit Losses, Charge-offs, Specifically Evaluated For Impairment	137,000	2,500,000	13,100,000
Nonaccrual Financing Receivable Specifically Evaluated For Impairment Allowance For Credit Losses Provisions	3,500,000	2,900,000	1,100,000
Nonaccrual Financing Receivable, Not Specifically Evaluated for Impairment	32,200,000	33,700,000
Nonaccrual Financing Receivable, Allowance for Credit Losses, Not Specifically Evaluated for Impairment	1,500,000	3,000,000
Classified as Troubled Debt Restructuring LHFI	11,300,000	14,800,000	24,300,000
TDRs comprised of credits with interest only payments	7,400,000	11,100,000	21,600,000
Financing Receivable, Related Allowance	1,700,000	1,600,000	4,300,000
Financing Receivable, Related Charge-offs	75,000	816,000	6,000,000
Loans Secured by Real Estate [Member] \| Construction, Land Development and Other Land [Member]
Loan and Lease Receivables, Impaired [Abstract]
Unpaid Principal Balance	20,849,000	24,350,000
Total LHFI With No Related Allowance Recorded	7,411,000	9,817,000
Total LHFI With an Allowance Recorded	6,456,000	3,510,000
Total Carrying Amount	13,867,000	13,327,000
Related Allowance	2,767,000	989,000
Average Recorded Investment	13,597,000	20,216,000
Loans Secured by Real Estate [Member] \| Secured by 1-4 Family Residential Properties [Member]
Loan and Lease Receivables, Impaired [Abstract]
Unpaid Principal Balance	31,151,000	26,541,000
Total LHFI With No Related Allowance Recorded	1,650,000	3,095,000
Total LHFI With an Allowance Recorded	23,971,000	18,508,000
Total Carrying Amount	25,621,000	21,603,000
Related Allowance	450,000	191,000
Average Recorded Investment	23,612,000	24,359,000
Loans Secured by Real Estate [Member] \| Nonfarm, Nonresidential Properties [Member]
Loan and Lease Receivables, Impaired [Abstract]
Unpaid Principal Balance	27,969,000	24,879,000
Total LHFI With No Related Allowance Recorded	12,868,000	10,225,000
Total LHFI With an Allowance Recorded	12,849,000	11,584,000
Total Carrying Amount	25,717,000	21,809,000
Related Allowance	2,787,000	2,307,000
Average Recorded Investment	23,763,000	20,049,000
Loans Secured by Real Estate [Member] \| Other Real Estate Secured Financing Receivable [Member]
Loan and Lease Receivables, Impaired [Abstract]
Unpaid Principal Balance	1,594,000	1,375,000
Total LHFI With No Related Allowance Recorded	0	0
Total LHFI With an Allowance Recorded	1,318,000	1,327,000
Total Carrying Amount	1,318,000	1,327,000
Related Allowance	52,000	122,000
Average Recorded Investment	1,322,000	2,641,000
Commercial and Industrial Loans [Member]
Loan and Lease Receivables, Impaired [Abstract]
Unpaid Principal Balance	13,916,000	8,702,000
Total LHFI With No Related Allowance Recorded	1,206,000	2,506,000
Total LHFI With an Allowance Recorded	10,898,000	3,780,000
Total Carrying Amount	12,104,000	6,286,000
Related Allowance	6,449,000	1,253,000
Average Recorded Investment	9,195,000	5,513,000
Consumer Loans [Member]
Loan and Lease Receivables, Impaired [Abstract]
Unpaid Principal Balance	152,000	286,000
Total LHFI With No Related Allowance Recorded	0	0
Total LHFI With an Allowance Recorded	88,000	151,000
Total Carrying Amount	88,000	151,000
Related Allowance	0	2,000
Average Recorded Investment	120,000	255,000
Other Loans [Member]
Loan and Lease Receivables, Impaired [Abstract]
Unpaid Principal Balance	734,000	849,000
Total LHFI With No Related Allowance Recorded	0	0
Total LHFI With an Allowance Recorded	628,000	735,000
Total Carrying Amount	628,000	735,000
Related Allowance	259,000	317,000
Average Recorded Investment	$682,000	$767,000

Loans_Held_for_Investment_LHFI4

Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI (2) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	Contract	Contract	Contract
Troubled Debt Restructurings [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts	17	14	64
Pre-Modification Outstanding Recorded Investment	$1,248	$4,884	$11,048
Post-Modification Outstanding Recorded Investment	1,234	4,820	10,884
Troubled Debt Restructurings [Member] \| Construction, Land Development and Other Land [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts			12
Pre-Modification Outstanding Recorded Investment			4,092
Post-Modification Outstanding Recorded Investment			4,092
Troubled Debt Restructurings [Member] \| Secured by 1-4 Family Residential Properties [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts	17	10	48
Pre-Modification Outstanding Recorded Investment	1,248	498	5,399
Post-Modification Outstanding Recorded Investment	1,234	441	5,383
Troubled Debt Restructurings [Member] \| Loans secured by Nonfarm, Nonresidential Properties [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts		1	2
Pre-Modification Outstanding Recorded Investment		952	1,210
Post-Modification Outstanding Recorded Investment		952	1,210
Troubled Debt Restructurings [Member] \| Other Loans Secured by Real Estate [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts			1
Pre-Modification Outstanding Recorded Investment			199
Post-Modification Outstanding Recorded Investment			199
Troubled Debt Restructurings [Member] \| Commercial and Industrial [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts		2	1
Pre-Modification Outstanding Recorded Investment		944	148
Post-Modification Outstanding Recorded Investment		937	0
Troubled Debt Restructurings [Member] \| Other Loans [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts		1
Pre-Modification Outstanding Recorded Investment		2,490
Post-Modification Outstanding Recorded Investment		2,490
Troubled Debt Restructurings that Subsequently Defaulted [Member]
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Contracts	1	5	24
Recorded Investment	103	345	4,212
Troubled Debt Restructurings that Subsequently Defaulted [Member] \| Construction, Land Development and Other Land [Member]
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Contracts	0	0	7
Recorded Investment	0	0	1,881
Troubled Debt Restructurings that Subsequently Defaulted [Member] \| Secured by 1-4 Family Residential Properties [Member]
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Contracts	1	5	16
Recorded Investment	103	345	1,469
Troubled Debt Restructurings that Subsequently Defaulted [Member] \| Loans secured by Nonfarm, Nonresidential Properties [Member]
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Contracts	0	0	1
Recorded Investment	$0	$0	$862

Loans_Held_for_Investment_LHFI5

Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI (3) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Modifications [Line Items]
Nonaccrual	$79,343	$65,238
Troubled Debt Restructurings [Member]
Financing Receivable, Modifications [Line Items]
Accruing	1,385	1,320	1,513
Nonaccrual	9,910	13,456	22,760
Total	11,295	14,776	24,273
Troubled Debt Restructurings [Member] \| Construction, Land Development and Other Land [Member]
Financing Receivable, Modifications [Line Items]
Accruing	0	0	233
Nonaccrual	3,665	6,247	12,073
Total	3,665	6,247	12,306
Troubled Debt Restructurings [Member] \| Secured by 1-4 Family Residential Properties [Member]
Financing Receivable, Modifications [Line Items]
Accruing	1,385	1,320	1,280
Nonaccrual	3,733	4,201	5,908
Total	5,118	5,521	7,188
Troubled Debt Restructurings [Member] \| Nonfarm, Nonresidential Properties [Member]
Financing Receivable, Modifications [Line Items]
Accruing	0	0	0
Nonaccrual	1,854	2,292	4,582
Total	1,854	2,292	4,582
Troubled Debt Restructurings [Member] \| Other Loans Secured by Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Accruing	0	0	0
Nonaccrual	149	167	197
Total	149	167	197
Troubled Debt Restructurings [Member] \| Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Accruing	0	0
Nonaccrual	509	549
Total	$509	$549

Loans_Held_for_Investment_LHFI6

Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI (4) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
	CreditRiskGrade
	KeyRatios
	Loan
Financing Receivable Aging [Abstract]
Current	$6,349,071,000	$5,714,900,000
Nonaccrual	79,343,000	65,238,000
Total LHFI	6,449,469,000	5,798,881,000
Credit amount used as baseline in evaluating residential real estate development and non-owner occupied commercial real estate for loan policy	1,000,000
Number of days used as baseline in evaluating collateral documentation exceptions for loan policy (in days)	90 days
Loan amount used as baseline in credit quality review for loan policy	100,000
Number of key quality ratios	6
Number of individual credit risk grades	10
Number of primary commercial loan groups	9
Minimum [Member]
Financing Receivable Aging [Abstract]
Period to conduct asset review	6 months
Maximum [Member]
Financing Receivable Aging [Abstract]
Period to conduct asset review	18 months
Loans Secured by Real Estate [Member] \| Construction, Land Development and Other Land [Member]
Financing Receivable Aging [Abstract]
Current	605,685,000	582,639,000
Nonaccrual	13,867,000	13,327,000
Total LHFI	619,877,000	596,889,000
Loans Secured by Real Estate [Member] \| Secured by 1-4 Family Residential Properties [Member]
Financing Receivable Aging [Abstract]
Current	1,595,557,000	1,451,528,000
Nonaccrual	25,621,000	21,603,000
Total LHFI	1,634,397,000	1,485,564,000
Loans Secured by Real Estate [Member] \| Nonfarm, Nonresidential Properties [Member]
Financing Receivable Aging [Abstract]
Current	1,525,482,000	1,391,286,000
Nonaccrual	25,717,000	21,809,000
Total LHFI	1,553,193,000	1,415,139,000
Loans Secured by Real Estate [Member] \| Other Real Estate Secured Financing Receivable [Member]
Financing Receivable Aging [Abstract]
Current	252,389,000	188,030,000
Nonaccrual	1,318,000	1,327,000
Total LHFI	253,787,000	189,362,000
Consumer Loans [Member]
Financing Receivable Aging [Abstract]
Current	165,503,000	162,843,000
Nonaccrual	88,000	151,000
Total LHFI	167,964,000	165,308,000
Other Loans [Member]
Financing Receivable Aging [Abstract]
Current	949,132,000	788,253,000
Nonaccrual	628,000	735,000
Total LHFI	949,901,000	789,005,000
Commercial Portfolio Segment [Member]
Financing Receivable [Abstract]
Financing receivable commercial	4,708,378,000	4,213,735,000
Commercial Portfolio Segment [Member] \| Pass [Member]
Financing Receivable [Abstract]
Financing receivable commercial	4,519,970,000	3,982,761,000
Commercial Portfolio Segment [Member] \| Special Mention [Member]
Financing Receivable [Abstract]
Financing receivable commercial	22,663,000	36,313,000
Commercial Portfolio Segment [Member] \| Substandard [Member]
Financing Receivable [Abstract]
Financing receivable commercial	164,053,000	190,743,000
Commercial Portfolio Segment [Member] \| Doubtful [Member]
Financing Receivable [Abstract]
Financing receivable commercial	1,692,000	3,918,000
Commercial Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Construction, Land Development and Other Land [Member]
Financing Receivable [Abstract]
Financing receivable commercial	556,641,000	545,691,000
Commercial Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Construction, Land Development and Other Land [Member] \| Pass [Member]
Financing Receivable [Abstract]
Financing receivable commercial	518,944,000	493,380,000
Commercial Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Construction, Land Development and Other Land [Member] \| Special Mention [Member]
Financing Receivable [Abstract]
Financing receivable commercial	479,000	4,383,000
Commercial Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Construction, Land Development and Other Land [Member] \| Substandard [Member]
Financing Receivable [Abstract]
Financing receivable commercial	37,022,000	47,610,000
Commercial Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Construction, Land Development and Other Land [Member] \| Doubtful [Member]
Financing Receivable [Abstract]
Financing receivable commercial	196,000	318,000
Commercial Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Secured by 1-4 Family Residential Properties [Member]
Financing Receivable [Abstract]
Financing receivable commercial	134,551,000	128,068,000
Commercial Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Pass [Member]
Financing Receivable [Abstract]
Financing receivable commercial	125,203,000	119,640,000
Commercial Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Special Mention [Member]
Financing Receivable [Abstract]
Financing receivable commercial	1,652,000	479,000
Commercial Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Substandard [Member]
Financing Receivable [Abstract]
Financing receivable commercial	7,483,000	7,839,000
Commercial Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Doubtful [Member]
Financing Receivable [Abstract]
Financing receivable commercial	213,000	110,000
Commercial Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Nonfarm, Nonresidential Properties [Member]
Financing Receivable [Abstract]
Financing receivable commercial	1,552,318,000	1,413,692,000
Commercial Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Nonfarm, Nonresidential Properties [Member] \| Pass [Member]
Financing Receivable [Abstract]
Financing receivable commercial	1,462,226,000	1,313,470,000
Commercial Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Nonfarm, Nonresidential Properties [Member] \| Special Mention [Member]
Financing Receivable [Abstract]
Financing receivable commercial	8,431,000	12,620,000
Commercial Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Nonfarm, Nonresidential Properties [Member] \| Substandard [Member]
Financing Receivable [Abstract]
Financing receivable commercial	81,661,000	87,203,000
Commercial Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Nonfarm, Nonresidential Properties [Member] \| Doubtful [Member]
Financing Receivable [Abstract]
Financing receivable commercial	0	399,000
Commercial Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Other Real Estate Secured Financing Receivable [Member]
Financing Receivable [Abstract]
Financing receivable commercial	251,380,000	185,942,000
Commercial Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Pass [Member]
Financing Receivable [Abstract]
Financing receivable commercial	246,099,000	178,951,000
Commercial Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Special Mention [Member]
Financing Receivable [Abstract]
Financing receivable commercial	306,000	0
Commercial Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Substandard [Member]
Financing Receivable [Abstract]
Financing receivable commercial	4,975,000	6,756,000
Commercial Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Doubtful [Member]
Financing Receivable [Abstract]
Financing receivable commercial	0	235,000
Commercial Portfolio Segment [Member] \| Commercial and Industrial Loans [Member]
Financing Receivable [Abstract]
Financing receivable commercial	1,270,344,000	1,157,596,000
Commercial Portfolio Segment [Member] \| Commercial and Industrial Loans [Member] \| Pass [Member]
Financing Receivable [Abstract]
Financing receivable commercial	1,239,247,000	1,099,429,000
Commercial Portfolio Segment [Member] \| Commercial and Industrial Loans [Member] \| Special Mention [Member]
Financing Receivable [Abstract]
Financing receivable commercial	4,245,000	18,771,000
Commercial Portfolio Segment [Member] \| Commercial and Industrial Loans [Member] \| Substandard [Member]
Financing Receivable [Abstract]
Financing receivable commercial	26,133,000	37,209,000
Commercial Portfolio Segment [Member] \| Commercial and Industrial Loans [Member] \| Doubtful [Member]
Financing Receivable [Abstract]
Financing receivable commercial	719,000	2,187,000
Commercial Portfolio Segment [Member] \| Consumer Loans [Member]
Financing Receivable [Abstract]
Financing receivable commercial	0	496,000
Commercial Portfolio Segment [Member] \| Consumer Loans [Member] \| Pass [Member]
Financing Receivable [Abstract]
Financing receivable commercial	0	496,000
Commercial Portfolio Segment [Member] \| Consumer Loans [Member] \| Special Mention [Member]
Financing Receivable [Abstract]
Financing receivable commercial	0	0
Commercial Portfolio Segment [Member] \| Consumer Loans [Member] \| Substandard [Member]
Financing Receivable [Abstract]
Financing receivable commercial	0	0
Commercial Portfolio Segment [Member] \| Consumer Loans [Member] \| Doubtful [Member]
Financing Receivable [Abstract]
Financing receivable commercial	0	0
Commercial Portfolio Segment [Member] \| Other Loans [Member]
Financing Receivable [Abstract]
Financing receivable commercial	943,144,000	782,250,000
Commercial Portfolio Segment [Member] \| Other Loans [Member] \| Pass [Member]
Financing Receivable [Abstract]
Financing receivable commercial	928,251,000	777,395,000
Commercial Portfolio Segment [Member] \| Other Loans [Member] \| Special Mention [Member]
Financing Receivable [Abstract]
Financing receivable commercial	7,550,000	60,000
Commercial Portfolio Segment [Member] \| Other Loans [Member] \| Substandard [Member]
Financing Receivable [Abstract]
Financing receivable commercial	6,779,000	4,126,000
Commercial Portfolio Segment [Member] \| Other Loans [Member] \| Doubtful [Member]
Financing Receivable [Abstract]
Financing receivable commercial	564,000	669,000
Consumer Portfolio Segment [Member]
Financing Receivable Aging [Abstract]
Current	1,703,795,000	1,552,447,000
Past Due 30 - 89 Days	12,795,000	11,095,000
Past Due Greater Than 90 Days	2,638,000	3,298,000
Nonaccrual	21,863,000	18,306,000
Subtotal	1,741,091,000	1,585,146,000
Total LHFI	6,449,469,000	5,798,881,000
Consumer Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Construction, Land Development and Other Land [Member]
Financing Receivable Aging [Abstract]
Current	62,897,000	50,850,000
Past Due 30 - 89 Days	199,000	131,000
Past Due Greater Than 90 Days	59,000	0
Nonaccrual	81,000	217,000
Subtotal	63,236,000	51,198,000
Total LHFI	619,877,000	596,889,000
Consumer Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Secured by 1-4 Family Residential Properties [Member]
Financing Receivable Aging [Abstract]
Current	1,465,355,000	1,327,624,000
Past Due 30 - 89 Days	10,429,000	8,937,000
Past Due Greater Than 90 Days	2,367,000	2,996,000
Nonaccrual	21,695,000	17,939,000
Subtotal	1,499,846,000	1,357,496,000
Total LHFI	1,634,397,000	1,485,564,000
Consumer Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Nonfarm, Nonresidential Properties [Member]
Financing Receivable Aging [Abstract]
Current	875,000	1,439,000
Past Due 30 - 89 Days	0	8,000
Past Due Greater Than 90 Days	0	0
Nonaccrual	0	0
Subtotal	875,000	1,447,000
Total LHFI	1,553,193,000	1,415,139,000
Consumer Portfolio Segment [Member] \| Loans Secured by Real Estate [Member] \| Other Real Estate Secured Financing Receivable [Member]
Financing Receivable Aging [Abstract]
Current	2,407,000	3,418,000
Past Due 30 - 89 Days	0	2,000
Past Due Greater Than 90 Days	0	0
Nonaccrual	0	0
Subtotal	2,407,000	3,420,000
Total LHFI	253,787,000	189,362,000
Consumer Portfolio Segment [Member] \| Commercial and Industrial Loans [Member]
Financing Receivable Aging [Abstract]
Current	0	13,000
Past Due 30 - 89 Days	5,000	5,000
Past Due Greater Than 90 Days	1,000	0
Nonaccrual	0	0
Subtotal	6,000	18,000
Total LHFI	1,270,350,000	1,157,614,000
Consumer Portfolio Segment [Member] \| Consumer Loans [Member]
Financing Receivable Aging [Abstract]
Current	165,504,000	162,348,000
Past Due 30 - 89 Days	2,162,000	2,012,000
Past Due Greater Than 90 Days	211,000	302,000
Nonaccrual	87,000	150,000
Subtotal	167,964,000	164,812,000
Total LHFI	167,964,000	165,308,000
Consumer Portfolio Segment [Member] \| Other Loans [Member]
Financing Receivable Aging [Abstract]
Current	6,757,000	6,755,000
Past Due 30 - 89 Days	0	0
Past Due Greater Than 90 Days	0	0
Nonaccrual	0	0
Subtotal	6,757,000	6,755,000
Total LHFI	$949,901,000	$789,005,000

Loans_Held_for_Investment_LHFI7

Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI (5) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Financing Receivable, Recorded Investment, Aging [Abstract]
Past Due 30 - 59 Days	$15,146,000		$12,606,000
Past Due 60 - 89 Days	3,145,000		2,839,000
Past Due Greater Than 90 Days	2,764,000	[1]	3,298,000	[1]
Total Past Due	21,055,000		18,743,000
Nonaccrual	79,343,000		65,238,000
Current Loans	6,349,071,000		5,714,900,000
Total LHFI	6,449,469,000		5,798,881,000
LHFI past due 90 days or more	2,800,000		3,300,000
LHFS past due 90 days or more	25,900,000		21,500,000
Percentage of outstanding principal to be repurchased under GNMA optional repurchase program (in hundredths)	100.00%
Amount of delinquent loans repurchased			57,400,000
Repurchase gain included in gain on sales of loans			534,000
Loans Secured by Real Estate [Member] \| Construction, Land Development and Other Land [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Past Due 30 - 59 Days	248,000		656,000
Past Due 60 - 89 Days	17,000		267,000
Past Due Greater Than 90 Days	60,000	[1]	0	[1]
Total Past Due	325,000		923,000
Nonaccrual	13,867,000		13,327,000
Current Loans	605,685,000		582,639,000
Total LHFI	619,877,000		596,889,000
Loans Secured by Real Estate [Member] \| Secured by 1-4 Family Residential Properties [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Past Due 30 - 59 Days	8,424,000		7,322,000
Past Due 60 - 89 Days	2,428,000		2,115,000
Past Due Greater Than 90 Days	2,367,000	[1]	2,996,000	[1]
Total Past Due	13,219,000		12,433,000
Nonaccrual	25,621,000		21,603,000
Current Loans	1,595,557,000		1,451,528,000
Total LHFI	1,634,397,000		1,485,564,000
Loans Secured by Real Estate [Member] \| Nonfarm, Nonresidential Properties [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Past Due 30 - 59 Days	1,960,000		1,934,000
Past Due 60 - 89 Days	34,000		110,000
Past Due Greater Than 90 Days	0	[1]	0	[1]
Total Past Due	1,994,000		2,044,000
Nonaccrual	25,717,000		21,809,000
Current Loans	1,525,482,000		1,391,286,000
Total LHFI	1,553,193,000		1,415,139,000
Loans Secured by Real Estate [Member] \| Other Real Estate Secured Financing Receivable [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Past Due 30 - 59 Days	80,000		2,000
Past Due 60 - 89 Days	0		3,000
Past Due Greater Than 90 Days	0	[1]	0	[1]
Total Past Due	80,000		5,000
Nonaccrual	1,318,000		1,327,000
Current Loans	252,389,000		188,030,000
Total LHFI	253,787,000		189,362,000
Commercial And Industrial Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Past Due 30 - 59 Days	2,491,000		809,000
Past Due 60 - 89 Days	306,000		198,000
Past Due Greater Than 90 Days	126,000	[1]	0	[1]
Total Past Due	2,923,000		1,007,000
Nonaccrual	12,104,000		6,286,000
Current Loans	1,255,323,000		1,150,321,000
Total LHFI	1,270,350,000		1,157,614,000
Consumer Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Past Due 30 - 59 Days	1,811,000		1,866,000
Past Due 60 - 89 Days	351,000		146,000
Past Due Greater Than 90 Days	211,000	[1]	302,000	[1]
Total Past Due	2,373,000		2,314,000
Nonaccrual	88,000		151,000
Current Loans	165,503,000		162,843,000
Total LHFI	167,964,000		165,308,000
Other Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Past Due 30 - 59 Days	132,000		17,000
Past Due 60 - 89 Days	9,000		0
Past Due Greater Than 90 Days	0	[1]	0	[1]
Total Past Due	141,000		17,000
Nonaccrual	628,000		735,000
Current Loans	949,132,000		788,253,000
Total LHFI	$949,901,000		$789,005,000

[1]	Past due 90 days or more but still accruing interest.

Loans_Held_for_Investment_LHFI8

Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI (6) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	Scale
	Factor
	Loan
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	$66,448	$78,738	$89,518
Loans charged-off	-13,226	-13,478	-31,376
Recoveries	15,183	14,609	13,830
Net recoveries (charge-offs)	1,957	1,131	-17,546
Provision for loan losses, LHFI	1,211	-13,421	6,766
Balance at end of period	69,616	66,448	78,738
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total	69,616	66,448	78,738
Number of Loan Types For Commercial Portfolio	9
Maximum value of commercial LHFI which were subject to further refinement of allowance for loan loss methodology	500
Number Of Unique Qualitative Factors Used To Analyze Consumer Loans	5
Number of Risk Rate Factors For Commercial Loans	450
The Minimum Score For Qualitative Risk Factor	0
The Maximum Score For Qualitative Risk Factor	100
Additional provision due to revision of methodology	2,222	1,600	1,400
Allowance for Loan Loses, LHFI [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	66,448	78,738
Loans charged-off	-13,226	-13,478
Recoveries	15,183	14,609
Provision for loan losses, LHFI	1,211	-13,421
Balance at end of period	69,616	66,448
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually	12,764	5,181
Collectively	56,852	61,267
Total	69,616	66,448
Real Estate Secured Financing Receivable [Member] \| Construction, Land Development and Other Land [Member] \| Allowance for Loan Loses, LHFI [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	13,165	21,838
Loans charged-off	-1,100	-1,441
Recoveries	3,608	3,077
Provision for loan losses, LHFI	-2,600	-10,309
Balance at end of period	13,073	13,165
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually	2,767	988
Collectively	10,306	12,177
Total	13,073	13,165
Real Estate Secured Financing Receivable [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Allowance for Loan Loses, LHFI [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	9,633	12,957
Loans charged-off	-2,505	-1,298
Recoveries	922	427
Provision for loan losses, LHFI	1,627	-2,453
Balance at end of period	9,677	9,633
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually	450	191
Collectively	9,227	9,442
Total	9,677	9,633
Real Estate Secured Financing Receivable [Member] \| Nonfarm, Nonresidential Properties [Member] \| Allowance for Loan Loses, LHFI [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	19,672	21,096
Loans charged-off	-390	-1,002
Recoveries	944	225
Provision for loan losses, LHFI	-1,703	-647
Balance at end of period	18,523	19,672
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually	2,787	2,307
Collectively	15,736	17,365
Total	18,523	19,672
Real Estate Secured Financing Receivable [Member] \| Other Loans Secured by Real Estate [Member] \| Allowance for Loan Loses, LHFI [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	2,080	2,197
Loans charged-off	-277	-910
Recoveries	0	229
Provision for loan losses, LHFI	338	564
Balance at end of period	2,141	2,080
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually	52	123
Collectively	2,089	1,957
Total	2,141	2,080
Commercial And Industrial Loans [Member] \| Allowance for Loan Loses, LHFI [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	15,522	14,319
Loans charged-off	-2,092	-1,371
Recoveries	2,657	2,298
Provision for loan losses, LHFI	3,830	276
Balance at end of period	19,917	15,522
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually	6,449	1,253
Collectively	13,468	14,269
Total	19,917	15,522
Consumer Loans [Member] \| Allowance for Loan Loses, LHFI [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	2,405	3,087
Loans charged-off	-1,965	-2,425
Recoveries	3,883	4,798
Provision for loan losses, LHFI	-2,174	-3,055
Balance at end of period	2,149	2,405
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually	0	2
Collectively	2,149	2,403
Total	2,149	2,405
Other Loans [Member] \| Allowance for Loan Loses, LHFI [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	3,971	3,244
Loans charged-off	-4,897	-5,031
Recoveries	3,169	3,555
Provision for loan losses, LHFI	1,893	2,203
Balance at end of period	4,136	3,971
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually	259	317
Collectively	3,877	3,654
Total	$4,136	$3,971

Acquired_Loans_Details

Acquired Loans (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Noncovered [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Acquired loans	$525,783	$769,990
Less allowance for loan losses, acquired loans	10,541	7,249
Net acquired loans	515,242	762,741
Covered [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Acquired loans	23,626	34,216
Less allowance for loan losses, acquired loans	1,518	2,387
Net acquired loans	22,108	31,829
Real Estate Secured Financing Receivable [Member] \| Construction Land Development And Other Financing Receivable [Member] \| Noncovered [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Acquired loans	58,309	98,928
Real Estate Secured Financing Receivable [Member] \| Construction Land Development And Other Financing Receivable [Member] \| Covered [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Acquired loans	1,197	2,363
Real Estate Secured Financing Receivable [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Noncovered [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Acquired loans	116,920	157,914
Real Estate Secured Financing Receivable [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Covered [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Acquired loans	13,180	16,416
Real Estate Secured Financing Receivable [Member] \| Nonfarm, Nonresidential Properties [Member] \| Noncovered [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Acquired loans	202,323	287,136
Real Estate Secured Financing Receivable [Member] \| Nonfarm, Nonresidential Properties [Member] \| Covered [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Acquired loans	7,672	10,945
Real Estate Secured Financing Receivable [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Noncovered [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Acquired loans	27,813	33,948
Real Estate Secured Financing Receivable [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Covered [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Acquired loans	1,096	2,644
Commercial And Industrial Loans [Member] \| Noncovered [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Acquired loans	88,256	149,495
Commercial And Industrial Loans [Member] \| Covered [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Acquired loans	277	394
Consumer Loans Financing Receivable [Member] \| Noncovered [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Acquired loans	9,772	18,428
Consumer Loans Financing Receivable [Member] \| Covered [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Acquired loans	0	119
Other Loans Financing Receivable [Member] \| Noncovered [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Acquired loans	22,390	24,141
Other Loans Financing Receivable [Member] \| Covered [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Acquired loans	$204	$1,335

Acquired_Loans_Part_1_Details

Acquired Loans Part 1 (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 15, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 15, 2013
At acquisition date [Abstract]
Accretable yield	($77,149)	($109,006)	($26,383)
BancTrust Financial Group, Inc. [Member]
At acquisition date [Abstract]
Contractually required principal and interest				1,256,669
Nonaccretable difference				201,324
Cash flows expected to be collected				1,055,345
Accretable yield				98,394
FASB ASC Topic 310-20 discount				12,716
Fair value of loans at acquisition				$944,235

Acquired_Loans_Part_2_Details

Acquired Loans Part 2 (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Carrying value of acquired loans [Abstract]
Accretion to interest income	$48,627		$40,688
Acquired Impaired [Member] \| Noncovered Loans [Member]
Carrying value of acquired loans [Abstract]
Net carrying value, beginning	639,656		72,942
Loans acquired			790,335	[1]
Accretion to interest income	44,575		35,538
Payments received, net	-216,378		-229,618
Other	-29,724	[2]	-24,177	[2]
Less allowance for loan losses, acquired loans	-3,978		-5,364
Net carrying value, ending	434,151		639,656
Acquired Impaired [Member] \| Covered Loans [Member]
Carrying value of acquired loans [Abstract]
Net carrying value, beginning	30,166		45,391
Loans acquired			0	[1]
Accretion to interest income	4,052		5,150
Payments received, net	-12,396		-18,976
Other	-1,733	[2]	-3,202	[2]
Less allowance for loan losses, acquired loans	415		1,803
Net carrying value, ending	20,504		30,166
Acquired Not ASC 310-30 [Member] \| Noncovered Loans [Member]
Carrying value of acquired loans [Abstract]
Net carrying value, beginning	123,085	[3]	6,696	[3]
Loans acquired			153,900	[1],[3]
Accretion to interest income	1,706	[3]	2,628	[3]
Payments received, net	-42,284	[3]	-39,281	[3]
Other	-2,102	[2],[3]	-858	[2],[3]
Less allowance for loan losses, acquired loans	686	[3]	0	[3]
Net carrying value, ending	81,091	[3]	123,085	[3]
Acquired Not ASC 310-30 [Member] \| Covered Loans [Member]
Carrying value of acquired loans [Abstract]
Net carrying value, beginning	1,663	[3]	2,460	[3]
Loans acquired			0	[1],[3]
Accretion to interest income	1	[3]	159	[3]
Payments received, net	-30	[3]	-819	[3]
Other	-484	[2],[3]	-137	[2],[3]
Less allowance for loan losses, acquired loans	454	[3]	0	[3]
Net carrying value, ending	$1,604	[3]	$1,663	[3]

[1]	Adjusted fair value of loans acquired from BancTrust on February 15, 2013.
[2]	Includes acquired loan terminations through foreclosure, charge-off, pool recovery and other terminations.
[3]	"Acquired Not ASC 310-30" loans consist of revolving credit agreements and commercial leases that are not in scope for FASB ASC Topic 310-30.

Acquired_Loans_Part_3_Details

Acquired Loans Part 3 (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Feb. 15, 2013
Change in accretable difference on acquired loans [Abstract]
Accretable yield, beginning	($109,006)		($26,383)
Additions due to acquisition	0	[1]	-98,394	[1]
Accretion to interest income	48,627		40,688
Disposals	16,383		18,438
Reclassification to / (from) nonaccretable difference	-33,153	[2]	-43,355	[2]
Accretable yield, ending	-77,149		-109,006
BancTrust Financial Group, Inc. [Member]
Change in accretable difference on acquired loans [Abstract]
Accretable yield, beginning					98,394
Accretable yield, ending					$98,394

[1]	Accretable yield on loans acquired from BancTrust on February 15, 2013, including measurement period adjustments.
[2]	Reclassifications from nonaccretable difference are due to lower loss expectations and improvements in expected cashflows.

Acquired_Loans_Part_4_Details

Acquired Loans Part 4 (Details) (USD $)	12 Months Ended			3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Feb. 15, 2013
	CreditRiskGrade	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Feb. 15, 2013
Allowance for loan loss [Abstract]
Balance, beginning	$9,636,000	$6,075,000	$502,000
Provision for loan losses, acquired loans	6,171,000	6,039,000	5,528,000
Loans charged-off	-6,147,000	-4,094,000	-371,000
Recoveries	2,399,000	1,616,000	416,000
Net (charge-offs) recoveries	-3,748,000	-2,478,000	45,000
Balance, ending	12,059,000	9,636,000	6,075,000	9,636,000
Number of individual credit risk grades	10
Nonaccrual loans not accounted for under FASB ASC Topic 310-30	1,100,000	2,400,000		2,400,000
BancTrust Financial Group, Inc. [Member]
Allowance for loan loss [Abstract]
Revolving credit agreements acquired					153,900,000
Decrease in acquired non covered loans as measurement period adjustment		6,800,000		6,800,000
Covered Loans [Member]
Allowance for loan loss [Abstract]
Balance, beginning	2,387,000	4,190,000	502,000
Provision for loan losses, acquired loans	-978,000	-1,328,000	3,612,000
Loans charged-off	127,000	-460,000	-81,000
Recoveries	-18,000	-15,000	157,000
Net (charge-offs) recoveries	109,000	-475,000	76,000
Balance, ending	1,518,000	2,387,000	4,190,000	2,387,000
Noncovered Loans [Member]
Allowance for loan loss [Abstract]
Balance, beginning	7,249,000	1,885,000	0
Provision for loan losses, acquired loans	7,149,000	7,367,000	1,916,000
Loans charged-off	-6,274,000	-3,634,000	-290,000
Recoveries	2,417,000	1,631,000	259,000
Net (charge-offs) recoveries	-3,857,000	-2,003,000	-31,000
Balance, ending	$10,541,000	$7,249,000	$1,885,000	$7,249,000

Acquired_Loans_Part_5_Details

Acquired Loans Part 5 (Details) (USD $)	Dec. 31, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Acquired Loans, Aging [Abstract]
Current	$498,236		$718,638
Past Due Greater Than 90 Days	43,412	[1]	63,444	[1]
Nonaccrual	1,144	[2]	2,353	[2]
Total acquired loans	549,409		804,206
Percentage of risk of losses incurred on acquired covered loans (in hundredths)	20.00%		20.00%
Noncovered [Member]
Acquired Loans, Aging [Abstract]
Current	477,216		691,632
Past Due Greater Than 90 Days	42,149	[1]	60,308	[1]
Nonaccrual	1,077	[2]	1,867	[2]
Total acquired loans	525,783		769,990
Covered [Member]
Acquired Loans, Aging [Abstract]
Current	21,020		27,006
Past Due Greater Than 90 Days	1,263	[1]	3,136	[1]
Nonaccrual	67	[2]	486	[2]
Total acquired loans	23,626		34,216
Real Estate Secured Financing Receivable [Member] \| Construction Land Development And Other Financing Receivable [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Current	35,877		65,001
Past Due Greater Than 90 Days	21,985	[1]	31,744	[1]
Nonaccrual	194	[2]	67	[2]
Total acquired loans	58,309		98,928
Real Estate Secured Financing Receivable [Member] \| Construction Land Development And Other Financing Receivable [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Current	821		1,278
Past Due Greater Than 90 Days	376	[1]	553	[1]
Nonaccrual	0	[2]	445	[2]
Total acquired loans	1,197		2,363
Real Estate Secured Financing Receivable [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Current	107,779		145,142
Past Due Greater Than 90 Days	5,162	[1]	7,589	[1]
Nonaccrual	422	[2]	116	[2]
Total acquired loans	116,920		157,914
Real Estate Secured Financing Receivable [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Current	12,154		14,401
Past Due Greater Than 90 Days	477	[1]	1,142	[1]
Nonaccrual	0	[2]	0	[2]
Total acquired loans	13,180		16,416
Real Estate Secured Financing Receivable [Member] \| Nonfarm, Nonresidential Properties [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Current	188,094		263,276
Past Due Greater Than 90 Days	13,275	[1]	15,421	[1]
Nonaccrual	0	[2]	461	[2]
Total acquired loans	202,323		287,136
Real Estate Secured Financing Receivable [Member] \| Nonfarm, Nonresidential Properties [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Current	6,945		8,247
Past Due Greater Than 90 Days	0	[1]	793	[1]
Nonaccrual	0	[2]	0	[2]
Total acquired loans	7,672		10,945
Real Estate Secured Financing Receivable [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Current	27,209		31,953
Past Due Greater Than 90 Days	604	[1]	1,922	[1]
Nonaccrual	0	[2]	33	[2]
Total acquired loans	27,813		33,948
Real Estate Secured Financing Receivable [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Current	728		1,932
Past Due Greater Than 90 Days	368	[1]	2	[1]
Nonaccrual	0	[2]	0	[2]
Total acquired loans	1,096		2,644
Commercial And Industrial Loans Financing Receivable [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Current	86,234		144,195
Past Due Greater Than 90 Days	1,099	[1]	3,387	[1]
Nonaccrual	461	[2]	1,170	[2]
Total acquired loans	88,256		149,495
Commercial And Industrial Loans Financing Receivable [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Current	168		340
Past Due Greater Than 90 Days	42	[1]	0	[1]
Nonaccrual	67	[2]	41	[2]
Total acquired loans	277		394
Consumer Loans Financing Receivable [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Current	9,633		18,097
Past Due Greater Than 90 Days	24	[1]	92	[1]
Nonaccrual	0	[2]	0	[2]
Total acquired loans	9,772		18,428
Consumer Loans Financing Receivable [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Current	0		119
Past Due Greater Than 90 Days	0	[1]	0	[1]
Nonaccrual	0	[2]	0	[2]
Total acquired loans	0		119
Other Loans Financing Receivable [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Current	22,390		23,968
Past Due Greater Than 90 Days	0	[1]	153	[1]
Nonaccrual	0	[2]	20	[2]
Total acquired loans	22,390		24,141
Other Loans Financing Receivable [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Current	204		689
Past Due Greater Than 90 Days	0	[1]	646	[1]
Nonaccrual	0	[2]	0	[2]
Total acquired loans	204		1,335
Commercial Portfolio Segment [Member] \| Pass [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	320,915		433,015
Commercial Portfolio Segment [Member] \| Pass [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	315,953		424,355
Commercial Portfolio Segment [Member] \| Pass [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	4,962	[3]	8,660	[3]
Commercial Portfolio Segment [Member] \| Special Mention [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	5,101		18,902
Commercial Portfolio Segment [Member] \| Special Mention [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	4,646		18,201
Commercial Portfolio Segment [Member] \| Special Mention [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	455	[3]	701	[3]
Commercial Portfolio Segment [Member] \| Substandard [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	108,813		186,787
Commercial Portfolio Segment [Member] \| Substandard [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	103,400		177,897
Commercial Portfolio Segment [Member] \| Substandard [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	5,413	[3]	8,890	[3]
Commercial Portfolio Segment [Member] \| Doubtful [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	11,931		22,494
Commercial Portfolio Segment [Member] \| Doubtful [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	11,827		21,075
Commercial Portfolio Segment [Member] \| Doubtful [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	104	[3]	1,419	[3]
Commercial Portfolio Segment [Member] \| Commercial Subtotal [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	446,760		661,198
Commercial Portfolio Segment [Member] \| Commercial Subtotal [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	435,826		641,528
Commercial Portfolio Segment [Member] \| Commercial Subtotal [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	10,934	[3]	19,670	[3]
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Construction Land Development And Other Financing Receivable [Member] \| Pass [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	20,224		39,075
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Construction Land Development And Other Financing Receivable [Member] \| Pass [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	0	[3]	228	[3]
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Construction Land Development And Other Financing Receivable [Member] \| Special Mention [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	280		2,506
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Construction Land Development And Other Financing Receivable [Member] \| Special Mention [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	0	[3]	0	[3]
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Construction Land Development And Other Financing Receivable [Member] \| Substandard [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	28,339		42,486
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Construction Land Development And Other Financing Receivable [Member] \| Substandard [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	955	[3]	1,126	[3]
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Construction Land Development And Other Financing Receivable [Member] \| Doubtful [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	5,821		8,445
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Construction Land Development And Other Financing Receivable [Member] \| Doubtful [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	102	[3]	771	[3]
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Construction Land Development And Other Financing Receivable [Member] \| Commercial Subtotal [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	54,664		92,512
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Construction Land Development And Other Financing Receivable [Member] \| Commercial Subtotal [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	1,057	[3]	2,125	[3]
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Pass [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	30,796		33,810
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Pass [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	194	[3]	1,629	[3]
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Special Mention [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	760		2,983
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Special Mention [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	235	[3]	430	[3]
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Substandard [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	8,466		17,422
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Substandard [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	1,045	[3]	1,798	[3]
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Doubtful [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	388		538
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Doubtful [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	0	[3]	0	[3]
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Commercial Subtotal [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	40,410		54,753
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Commercial Subtotal [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	1,474	[3]	3,857	[3]
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Nonfarm, Nonresidential Properties [Member] \| Pass [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	157,753		184,594
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Nonfarm, Nonresidential Properties [Member] \| Pass [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	4,419	[3]	5,446	[3]
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Nonfarm, Nonresidential Properties [Member] \| Special Mention [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	3,452		9,027
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Nonfarm, Nonresidential Properties [Member] \| Special Mention [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	88	[3]	109	[3]
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Nonfarm, Nonresidential Properties [Member] \| Substandard [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	39,408		88,952
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Nonfarm, Nonresidential Properties [Member] \| Substandard [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	2,879	[3]	4,723	[3]
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Nonfarm, Nonresidential Properties [Member] \| Doubtful [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	1,710		4,563
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Nonfarm, Nonresidential Properties [Member] \| Doubtful [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	0	[3]	0	[3]
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Nonfarm, Nonresidential Properties [Member] \| Commercial Subtotal [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	202,323		287,136
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Nonfarm, Nonresidential Properties [Member] \| Commercial Subtotal [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	7,386	[3]	10,278	[3]
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Pass [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	22,754		28,156
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Pass [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	0	[3]	832	[3]
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Special Mention [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	92		1,437
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Special Mention [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	108	[3]	134	[3]
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Substandard [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	4,864		4,071
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Substandard [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	426	[3]	717	[3]
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Doubtful [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	95		184
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Doubtful [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	2	[3]	2	[3]
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Commercial Subtotal [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	27,805		33,848
Commercial Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Commercial Subtotal [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	536	[3]	1,685	[3]
Commercial Portfolio Segment [Member] \| Commercial And Industrial Loans Financing Receivable [Member] \| Pass [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	64,720		116,818
Commercial Portfolio Segment [Member] \| Commercial And Industrial Loans Financing Receivable [Member] \| Pass [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	145	[3]	254	[3]
Commercial Portfolio Segment [Member] \| Commercial And Industrial Loans Financing Receivable [Member] \| Special Mention [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	17		2,248
Commercial Portfolio Segment [Member] \| Commercial And Industrial Loans Financing Receivable [Member] \| Special Mention [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	24	[3]	28	[3]
Commercial Portfolio Segment [Member] \| Commercial And Industrial Loans Financing Receivable [Member] \| Substandard [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	19,706		24,084
Commercial Portfolio Segment [Member] \| Commercial And Industrial Loans Financing Receivable [Member] \| Substandard [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	108	[3]	112	[3]
Commercial Portfolio Segment [Member] \| Commercial And Industrial Loans Financing Receivable [Member] \| Doubtful [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	3,813		6,039
Commercial Portfolio Segment [Member] \| Commercial And Industrial Loans Financing Receivable [Member] \| Doubtful [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	0	[3]	0	[3]
Commercial Portfolio Segment [Member] \| Commercial And Industrial Loans Financing Receivable [Member] \| Commercial Subtotal [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	88,256		149,189
Commercial Portfolio Segment [Member] \| Commercial And Industrial Loans Financing Receivable [Member] \| Commercial Subtotal [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	277	[3]	394	[3]
Commercial Portfolio Segment [Member] \| Consumer Loans Financing Receivable [Member] \| Pass [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	0		21
Commercial Portfolio Segment [Member] \| Consumer Loans Financing Receivable [Member] \| Pass [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	0	[3]	0	[3]
Commercial Portfolio Segment [Member] \| Consumer Loans Financing Receivable [Member] \| Special Mention [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	0		0
Commercial Portfolio Segment [Member] \| Consumer Loans Financing Receivable [Member] \| Special Mention [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	0	[3]	0	[3]
Commercial Portfolio Segment [Member] \| Consumer Loans Financing Receivable [Member] \| Substandard [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	0		0
Commercial Portfolio Segment [Member] \| Consumer Loans Financing Receivable [Member] \| Substandard [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	0	[3]	0	[3]
Commercial Portfolio Segment [Member] \| Consumer Loans Financing Receivable [Member] \| Doubtful [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	0		0
Commercial Portfolio Segment [Member] \| Consumer Loans Financing Receivable [Member] \| Doubtful [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	0	[3]	0	[3]
Commercial Portfolio Segment [Member] \| Consumer Loans Financing Receivable [Member] \| Commercial Subtotal [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	0		21
Commercial Portfolio Segment [Member] \| Consumer Loans Financing Receivable [Member] \| Commercial Subtotal [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	0	[3]	0	[3]
Commercial Portfolio Segment [Member] \| Other Loans Financing Receivable [Member] \| Pass [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	19,706		21,881
Commercial Portfolio Segment [Member] \| Other Loans Financing Receivable [Member] \| Pass [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	204	[3]	271	[3]
Commercial Portfolio Segment [Member] \| Other Loans Financing Receivable [Member] \| Special Mention [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	45		0
Commercial Portfolio Segment [Member] \| Other Loans Financing Receivable [Member] \| Special Mention [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	0	[3]	0	[3]
Commercial Portfolio Segment [Member] \| Other Loans Financing Receivable [Member] \| Substandard [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	2,617		882
Commercial Portfolio Segment [Member] \| Other Loans Financing Receivable [Member] \| Substandard [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	0	[3]	414	[3]
Commercial Portfolio Segment [Member] \| Other Loans Financing Receivable [Member] \| Doubtful [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	0		1,306
Commercial Portfolio Segment [Member] \| Other Loans Financing Receivable [Member] \| Doubtful [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	0	[3]	646	[3]
Commercial Portfolio Segment [Member] \| Other Loans Financing Receivable [Member] \| Commercial Subtotal [Member] \| Noncovered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	22,368		24,069
Commercial Portfolio Segment [Member] \| Other Loans Financing Receivable [Member] \| Commercial Subtotal [Member] \| Covered [Member]
Acquired Loans, Commercial Loans [Abstract]
Acquired loans	204	[3]	1,331	[3]
Consumer Portfolio Segment [Member]
Acquired Loans, Aging [Abstract]
Current	96,194		132,901
Past Due 30-89 Days	2,947		4,793
Past Due Greater Than 90 Days	3,391		5,205
Nonaccrual	117		109
Subtotal	102,649		143,008
Total acquired loans	549,409		804,206
Consumer Portfolio Segment [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Current	84,318		120,354
Past Due 30-89 Days	2,474		3,946
Past Due Greater Than 90 Days	3,048		4,053
Nonaccrual	117		109
Subtotal	89,957		128,462
Total acquired loans	525,783		769,990
Consumer Portfolio Segment [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Current	11,876	[3]	12,547	[3]
Past Due 30-89 Days	473	[3]	847	[3]
Past Due Greater Than 90 Days	343	[3]	1,152	[3]
Nonaccrual	0	[3]	0	[3]
Subtotal	12,692	[3]	14,546	[3]
Total acquired loans	23,626	[3]	34,216	[3]
Consumer Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Construction Land Development And Other Financing Receivable [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Current	3,338		5,813
Past Due 30-89 Days	25		108
Past Due Greater Than 90 Days	282		495
Nonaccrual	0		0
Subtotal	3,645		6,416
Total acquired loans	58,309		98,928
Consumer Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Construction Land Development And Other Financing Receivable [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Current	140	[3]	133	[3]
Past Due 30-89 Days	0	[3]	77	[3]
Past Due Greater Than 90 Days	0	[3]	28	[3]
Nonaccrual	0	[3]	0	[3]
Subtotal	140	[3]	238	[3]
Total acquired loans	1,197	[3]	2,363	[3]
Consumer Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Current	71,316		95,987
Past Due 30-89 Days	2,335		3,599
Past Due Greater Than 90 Days	2,742		3,466
Nonaccrual	117		109
Subtotal	76,510		103,161
Total acquired loans	116,920		157,914
Consumer Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Current	10,925	[3]	11,179	[3]
Past Due 30-89 Days	473	[3]	428	[3]
Past Due Greater Than 90 Days	308	[3]	952	[3]
Nonaccrual	0	[3]	0	[3]
Subtotal	11,706	[3]	12,559	[3]
Total acquired loans	13,180	[3]	16,416	[3]
Consumer Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Nonfarm, Nonresidential Properties [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Current	0		0
Past Due 30-89 Days	0		0
Past Due Greater Than 90 Days	0		0
Nonaccrual	0		0
Subtotal	0		0
Total acquired loans	202,323		287,136
Consumer Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Nonfarm, Nonresidential Properties [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Current	286	[3]	495	[3]
Past Due 30-89 Days	0	[3]	0	[3]
Past Due Greater Than 90 Days	0	[3]	172	[3]
Nonaccrual	0	[3]	0	[3]
Subtotal	286	[3]	667	[3]
Total acquired loans	7,672	[3]	10,945	[3]
Consumer Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Current	8		100
Past Due 30-89 Days	0		0
Past Due Greater Than 90 Days	0		0
Nonaccrual	0		0
Subtotal	8		100
Total acquired loans	27,813		33,948
Consumer Portfolio Segment [Member] \| Real Estate Secured Financing Receivable [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Current	525	[3]	617	[3]
Past Due 30-89 Days	0	[3]	342	[3]
Past Due Greater Than 90 Days	35	[3]	0	[3]
Nonaccrual	0	[3]	0	[3]
Subtotal	560	[3]	959	[3]
Total acquired loans	1,096	[3]	2,644	[3]
Consumer Portfolio Segment [Member] \| Commercial And Industrial Loans Financing Receivable [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Current	0		306
Past Due 30-89 Days	0		0
Past Due Greater Than 90 Days	0		0
Nonaccrual	0		0
Subtotal	0		306
Total acquired loans	88,256		149,495
Consumer Portfolio Segment [Member] \| Commercial And Industrial Loans Financing Receivable [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Current	0	[3]	0	[3]
Past Due 30-89 Days	0	[3]	0	[3]
Past Due Greater Than 90 Days	0	[3]	0	[3]
Nonaccrual	0	[3]	0	[3]
Subtotal	0	[3]	0	[3]
Total acquired loans	277	[3]	394	[3]
Consumer Portfolio Segment [Member] \| Consumer Loans Financing Receivable [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Current	9,634		18,076
Past Due 30-89 Days	114		239
Past Due Greater Than 90 Days	24		92
Nonaccrual	0		0
Subtotal	9,772		18,407
Total acquired loans	9,772		18,428
Consumer Portfolio Segment [Member] \| Consumer Loans Financing Receivable [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Current	0	[3]	119	[3]
Past Due 30-89 Days	0	[3]	0	[3]
Past Due Greater Than 90 Days	0	[3]	0	[3]
Nonaccrual	0	[3]	0	[3]
Subtotal	0	[3]	119	[3]
Total acquired loans	0	[3]	119	[3]
Consumer Portfolio Segment [Member] \| Other Loans Financing Receivable [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Current	22		72
Past Due 30-89 Days	0		0
Past Due Greater Than 90 Days	0		0
Nonaccrual	0		0
Subtotal	22		72
Total acquired loans	22,390		24,141
Consumer Portfolio Segment [Member] \| Other Loans Financing Receivable [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Current	0	[3]	4	[3]
Past Due 30-89 Days	0	[3]	0	[3]
Past Due Greater Than 90 Days	0	[3]	0	[3]
Nonaccrual	0	[3]	0	[3]
Subtotal	0	[3]	4	[3]
Total acquired loans	$204	[3]	$1,335	[3]

[1]	Past due 90 days or more but still accruing interest.
[2]	Acquired loans not accounted for under FASB ASC Topic 310-30.
[3]	Total dollar balances are presented in this table; however, these loans are covered by the loss-share agreement with the FDIC. TNB is at risk for only 20% of the losses incurred on these loans.

Acquired_Loans_Part_6_Details

Acquired Loans Part 6 (Details) (USD $)	Dec. 31, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Acquired Loans, Aging [Abstract]
Past Due 30 - 59 Days	$3,823		$12,600
Past Due 60 - 89 Days	2,794		7,171
Past Due Greater Than 90 Days	43,412	[1]	63,444	[1]
Total Past Due	50,029		83,215
Nonaccrual	1,144	[2]	2,353	[2]
Current Loans	498,236		718,638
Acquired loans	549,409		804,206
Noncovered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 59 Days	3,331		11,171
Past Due 60 - 89 Days	2,010		5,012
Past Due Greater Than 90 Days	42,149	[1]	60,308	[1]
Total Past Due	47,490		76,491
Nonaccrual	1,077	[2]	1,867	[2]
Current Loans	477,216		691,632
Acquired loans	525,783		769,990
Covered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 59 Days	492		1,429
Past Due 60 - 89 Days	784		2,159
Past Due Greater Than 90 Days	1,263	[1]	3,136	[1]
Total Past Due	2,539		6,724
Nonaccrual	67	[2]	486	[2]
Current Loans	21,020		27,006
Acquired loans	23,626		34,216
Real Estate Secured Financing Receivable [Member] \| Construction Land Development And Other Financing Receivable [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 59 Days	246		1,648
Past Due 60 - 89 Days	7		468
Past Due Greater Than 90 Days	21,985	[1]	31,744	[1]
Total Past Due	22,238		33,860
Nonaccrual	194	[2]	67	[2]
Current Loans	35,877		65,001
Acquired loans	58,309		98,928
Real Estate Secured Financing Receivable [Member] \| Construction Land Development And Other Financing Receivable [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 59 Days	0		87
Past Due 60 - 89 Days	0		0
Past Due Greater Than 90 Days	376	[1]	553	[1]
Total Past Due	376		640
Nonaccrual	0	[2]	445	[2]
Current Loans	821		1,278
Acquired loans	1,197		2,363
Real Estate Secured Financing Receivable [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 59 Days	2,576		3,901
Past Due 60 - 89 Days	981		1,166
Past Due Greater Than 90 Days	5,162	[1]	7,589	[1]
Total Past Due	8,719		12,656
Nonaccrual	422	[2]	116	[2]
Current Loans	107,779		145,142
Acquired loans	116,920		157,914
Real Estate Secured Financing Receivable [Member] \| Secured by 1-4 Family Residential Properties [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 59 Days	253		515
Past Due 60 - 89 Days	296		358
Past Due Greater Than 90 Days	477	[1]	1,142	[1]
Total Past Due	1,026		2,015
Nonaccrual	0	[2]	0	[2]
Current Loans	12,154		14,401
Acquired loans	13,180		16,416
Real Estate Secured Financing Receivable [Member] \| Nonfarm, Nonresidential Properties [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 59 Days	89		4,851
Past Due 60 - 89 Days	865		3,127
Past Due Greater Than 90 Days	13,275	[1]	15,421	[1]
Total Past Due	14,229		23,399
Nonaccrual	0	[2]	461	[2]
Current Loans	188,094		263,276
Acquired loans	202,323		287,136
Real Estate Secured Financing Receivable [Member] \| Nonfarm, Nonresidential Properties [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 59 Days	239		243
Past Due 60 - 89 Days	488		1,662
Past Due Greater Than 90 Days	0	[1]	793	[1]
Total Past Due	727		2,698
Nonaccrual	0	[2]	0	[2]
Current Loans	6,945		8,247
Acquired loans	7,672		10,945
Real Estate Secured Financing Receivable [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 59 Days	0		40
Past Due 60 - 89 Days	0		0
Past Due Greater Than 90 Days	604	[1]	1,922	[1]
Total Past Due	604		1,962
Nonaccrual	0	[2]	33	[2]
Current Loans	27,209		31,953
Acquired loans	27,813		33,948
Real Estate Secured Financing Receivable [Member] \| Other Real Estate Secured Financing Receivable [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 59 Days	0		571
Past Due 60 - 89 Days	0		139
Past Due Greater Than 90 Days	368	[1]	2	[1]
Total Past Due	368		712
Nonaccrual	0	[2]	0	[2]
Current Loans	728		1,932
Acquired loans	1,096		2,644
Commercial And Industrial Loans Financing Receivable [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 59 Days	334		526
Past Due 60 - 89 Days	128		217
Past Due Greater Than 90 Days	1,099	[1]	3,387	[1]
Total Past Due	1,561		4,130
Nonaccrual	461	[2]	1,170	[2]
Current Loans	86,234		144,195
Acquired loans	88,256		149,495
Commercial And Industrial Loans Financing Receivable [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 59 Days	0		13
Past Due 60 - 89 Days	0		0
Past Due Greater Than 90 Days	42	[1]	0	[1]
Total Past Due	42		13
Nonaccrual	67	[2]	41	[2]
Current Loans	168		340
Acquired loans	277		394
Consumer Loans Financing Receivable [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 59 Days	86		205
Past Due 60 - 89 Days	29		34
Past Due Greater Than 90 Days	24	[1]	92	[1]
Total Past Due	139		331
Nonaccrual	0	[2]	0	[2]
Current Loans	9,633		18,097
Acquired loans	9,772		18,428
Consumer Loans Financing Receivable [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 59 Days	0		0
Past Due 60 - 89 Days	0		0
Past Due Greater Than 90 Days	0	[1]	0	[1]
Total Past Due	0		0
Nonaccrual	0	[2]	0	[2]
Current Loans	0		119
Acquired loans	0		119
Other Loans Financing Receivable [Member] \| Noncovered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 59 Days	0		0
Past Due 60 - 89 Days	0		0
Past Due Greater Than 90 Days	0	[1]	153	[1]
Total Past Due	0		153
Nonaccrual	0	[2]	20	[2]
Current Loans	22,390		23,968
Acquired loans	22,390		24,141
Other Loans Financing Receivable [Member] \| Covered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 59 Days	0		0
Past Due 60 - 89 Days	0		0
Past Due Greater Than 90 Days	0	[1]	646	[1]
Total Past Due	0		646
Nonaccrual	0	[2]	0	[2]
Current Loans	204		689
Acquired loans	$204		$1,335

[1]	Past due 90 days or more but still accruing interest.
[2]	Acquired loans not accounted for under FASB ASC Topic 310-30.

Premises_and_Equipment_Net_Det

Premises and Equipment, Net (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Premises and Equipment, Net, by Type [Abstract]
Total cost of premises and equipment	$418,854	$412,741
Less accumulated depreciation and amortization	218,073	205,458
Premises and equipment, net	200,781	207,283
Depreciation and amortization of premises and equipment	14,100	14,300	12,000
Land [Member]
Premises and Equipment, Net, by Type [Abstract]
Total cost of premises and equipment	57,794	58,132
Building and Leasehold Improvements [Member]
Premises and Equipment, Net, by Type [Abstract]
Total cost of premises and equipment	198,739	199,976
Furniture and Equipment [Member]
Premises and Equipment, Net, by Type [Abstract]
Total cost of premises and equipment	$162,321	$154,633

Mortgage_Banking_Details

Mortgage Banking (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	CPR	CPR	Dec. 31, 2012
Mortgage servicing rights [Abstract]
Balance at beginning of period	$67,834,000	$47,341,000
Origination of servicing assets	12,293,000	18,481,000
Change in fair value:
Due to market changes	-7,202,000	11,818,000
Due to runoff	-8,567,000	-9,806,000
Balance at end of period	64,358,000	67,834,000	47,341,000
Mortgage Loans on Real Estate [Line Items]
Total mortgage loans sold and serviced for others	5,636,249,000	5,460,676,000
Schedule of changes in the reserve for mortgage loan [Abstract]
Balance at beginning of period	1,050,000	7,800,000	4,277,000
Provision for putback expenses	600,000	1,561,000	8,015,000
Losses	-480,000	-4,756,000	-4,492,000
FNMA resolution	0	-3,555,000	0
Balance at end of period	1,170,000	1,050,000	7,800,000
Assumed average prepayment speed	11.51	9.72
Average discount rate (in hundredths)	10.29%	10.52%
Residential mortgage loans sold	913,500,000,000	1,358,000,000	1,816,000,000
Gains on sales of residential mortgage loans, before tax	10,800,000	26,400,000	33,900,000
Servicing fee income percentage of outstanding balance of underlying loans (in hundredths)	0.34%
Mortgage loans serviced for others	5,636,000,000	5,461,000,000
Period of putback response	60 days
Mortgage loan servicing representation and warranty expenses	600,000	1,600,000	8,000,000
Federal National Mortgage Association [Member]
Mortgage Loans on Real Estate [Line Items]
Total mortgage loans sold and serviced for others	3,579,987,000	3,499,659,000
Government National Mortgage Association [Member]
Mortgage Loans on Real Estate [Line Items]
Total mortgage loans sold and serviced for others	1,948,565,000	1,830,420,000
Federal Home Loan Mortgage Corporation [Member]
Mortgage Loans on Real Estate [Line Items]
Total mortgage loans sold and serviced for others	80,551,000	92,599,000
Other [Member]
Mortgage Loans on Real Estate [Line Items]
Total mortgage loans sold and serviced for others	$27,146,000	$37,998,000

Goodwill_and_Identifiable_Inta2

Goodwill and Identifiable Intangible Assets (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Roll Forward]
Goodwill, beginning of period	$372,851,000	$291,104,000
Goodwill from acquisitions		81,747,000
Measurement period adjustment during 2014	-7,351,000
Balance, end of period	365,500,000	372,851,000	291,104,000
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	99,532,000	99,532,000
Accumulated Amortization	66,298,000	57,542,000
Net Carrying Amount	33,234,000	41,990,000
Remaining Weighted-Average Amortization Period in Years	7 years 4 months 24 days
Amortization expense of identifiable intangible assets	8,800,000	8,800,000	3,800,000
Future amortization expense for identifiable intangible assets [Abstract]
2015	7,600,000
2016	6,700,000
2017	5,700,000
2018	4,800,000
2019	3,600,000
Impairment losses on identifiable intangible assets	0	0	0
Core Deposit Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	85,824,000	85,824,000
Accumulated Amortization	54,464,000	46,437,000
Net Carrying Amount	31,360,000	39,387,000
Remaining Weighted-Average Amortization Period in Years	7 years 6 months
Insurance Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,693,000	11,693,000
Accumulated Amortization	10,566,000	9,967,000
Net Carrying Amount	1,127,000	1,726,000
Remaining Weighted-Average Amortization Period in Years	4 years 10 months 24 days
Banking Charters [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,325,000	1,325,000
Accumulated Amortization	745,000	678,000
Net Carrying Amount	580,000	647,000
Remaining Weighted-Average Amortization Period in Years	8 years 8 months 12 days
Borrower Relationship Intangible [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	690,000	690,000
Accumulated Amortization	523,000	460,000
Net Carrying Amount	167,000	230,000
Remaining Weighted-Average Amortization Period in Years	2 years 8 months 12 days
General Banking [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	328,483,000	246,736,000
Goodwill from acquisitions		81,747,000
Measurement period adjustment during 2014	-7,351,000
Balance, end of period	321,132,000	328,483,000
Insurance [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	44,368,000	44,368,000
Goodwill from acquisitions		0
Measurement period adjustment during 2014	0
Balance, end of period	44,368,000	44,368,000
BancTrust acquisition [Member]
Goodwill [Roll Forward]
Goodwill acquisition		81,600,000
SOUTHBank Branches [Member]
Goodwill [Roll Forward]
Goodwill acquisition		$150,000
Number of branches		2

Other_Real_Estate_and_Covered_2

Other Real Estate and Covered Other Real Estate (Details) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012		Feb. 15, 2013	Mar. 16, 2012
	Market		Dec. 31, 2013		Dec. 31, 2012		Feb. 15, 2013	Mar. 16, 2012
Other real estate, excluding covered other real estate [Rollforward]
Balance at beginning of period	$106,539,000		$78,189,000		$79,053,000
Additions	37,428,000	[1]	80,256,000	[1]	38,894,000	[1]
Disposals	-43,802,000		-45,545,000		-33,155,000
Write-downs	-7,656,000		-6,361,000		-6,603,000
Balance at end of period	92,509,000		106,539,000		78,189,000
Gain (loss), net on the sale of other real estate included in ORE/Foreclosure expense	3,697,000		-881,000		-279,000
Other real estate, excluding covered other real estate [Line Items]
Total other real estate, excluding covered other real estate	92,509,000		106,539,000		78,189,000
Covered other real estate, beginning of period	5,108,000		5,741,000		6,331,000
Transfers from covered loans	2,851,000		1,934,000		1,424,000
FASB ASC 310-30 adjustment for the residual recorded investment	136,000		-345,000		-112,000
Net transfers from covered loans	2,987,000		1,589,000		1,312,000
Disposals	-1,232,000		-1,442,000		-1,631,000
Write-downs	-803,000		-780,000		-271,000
Covered other real estate, end of period	6,060,000		5,108,000		5,741,000
Gain, net on the sale of covered other real estate included in ORE/Foreclosure expenses	24,000		119,000		485,000
Business Acquisition [Line Items]
Key market regions	5
Schedule Of Covered Loans And Other Real Estate Acquired [Line Items]
Total covered other real estate	6,060,000		5,108,000		5,741,000
Construction Land Development And Other Land Properties [Member]
Other real estate, excluding covered other real estate [Line Items]
Covered other real estate, end of period	1,917,000		733,000
Schedule Of Covered Loans And Other Real Estate Acquired [Line Items]
Total covered other real estate	1,917,000		733,000
1-4 Family Residential Properties [Member]
Other real estate, excluding covered other real estate [Line Items]
Covered other real estate, end of period	1,103,000		1,981,000
Schedule Of Covered Loans And Other Real Estate Acquired [Line Items]
Total covered other real estate	1,103,000		1,981,000
Nonfarm, Nonresidential Properties [Member]
Other real estate, excluding covered other real estate [Line Items]
Covered other real estate, end of period	2,296,000		2,394,000
Schedule Of Covered Loans And Other Real Estate Acquired [Line Items]
Total covered other real estate	2,296,000		2,394,000
Other Real Estate Properties [Member]
Other real estate, excluding covered other real estate [Line Items]
Covered other real estate, end of period	744,000		0
Schedule Of Covered Loans And Other Real Estate Acquired [Line Items]
Total covered other real estate	744,000		0
BancTrust Financial Group, Inc. [Member]
Business Acquisition [Line Items]
Business acquisition, covered other real estate acquired							40,100,000
Bay Bank and Trust Company [Member]
Business Acquisition [Line Items]
Business acquisition, covered other real estate acquired								2,600,000
Construction, Land Development And Other Land Properties [Member]
Other real estate, excluding covered other real estate [Rollforward]
Balance at end of period	61,015,000		65,273,000
Other real estate, excluding covered other real estate [Line Items]
Total other real estate, excluding covered other real estate	61,015,000		65,273,000
1 - 4 Family Residential Properties [Member]
Other real estate, excluding covered other real estate [Rollforward]
Balance at end of period	10,150,000		14,696,000
Other real estate, excluding covered other real estate [Line Items]
Total other real estate, excluding covered other real estate	10,150,000		14,696,000
Nonfarm, Nonresidential Properties [Member]
Other real estate, excluding covered other real estate [Rollforward]
Balance at end of period	19,696,000		26,433,000
Other real estate, excluding covered other real estate [Line Items]
Total other real estate, excluding covered other real estate	19,696,000		26,433,000
Other Real Estate Properties [Member]
Other real estate, excluding covered other real estate [Rollforward]
Balance at end of period	1,648,000		137,000
Other real estate, excluding covered other real estate [Line Items]
Total other real estate, excluding covered other real estate	$1,648,000		$137,000

[1]	Includes $40.1 million of other real estate acquired from BancTrust on February 15, 2013, and $2.6 million of other real estate acquired from Bay Bank on March 16, 2012.

Other_Real_Estate_and_Covered_3

Other Real Estate and Covered Other Real Estate, by geographical location (Details) (USD $)	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011
Other real estate, excluding covered other real estate by geographic location [Line Items]
Total other real estate, excluding covered other real estate	$92,509		$106,539		$78,189	$79,053
Alabama [Member]
Other real estate, excluding covered other real estate by geographic location [Line Items]
Total other real estate, excluding covered other real estate	21,196		25,912
Florida [Member]
Other real estate, excluding covered other real estate by geographic location [Line Items]
Total other real estate, excluding covered other real estate	35,324		34,480
Mississippi [Member]
Other real estate, excluding covered other real estate by geographic location [Line Items]
Total other real estate, excluding covered other real estate	17,397	[1]	22,766	[1]
Tennessee [Member]
Other real estate, excluding covered other real estate by geographic location [Line Items]
Total other real estate, excluding covered other real estate	10,292	[2]	12,892	[2]
Texas [Member]
Other real estate, excluding covered other real estate by geographic location [Line Items]
Total other real estate, excluding covered other real estate	$8,300		$10,489

[1]	Mississippi includes Central and Southern Mississippi Regions.
[2]	Tennessee includes Memphis, Tennessee and Northern Mississippi Regions.

FDIC_Indemnification_Asset_Det

FDIC Indemnification Asset (Details) (USD $)	0 Months Ended	12 Months Ended
FDIC Indemnification Asset (Details) (USD $)	Apr. 15, 2011	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
FDIC Indemnification Asset [Abstract]
FDIC loss-share agreement covered loans and other real estate losses (in hundredths)	80.00%
FDIC True-up provisions		$2,100,000	$1,700,000
Reduction of FDIC indemnification asset included in other noninterest income		800,000	3,400,000	3,700,000
Balance, beginning of period		14,347,000	21,774,000	28,348,000
(Amortization) Accretion		-2,074,000	-2,469,000	245,000
Transfers to FDIC claims		-4,443,000	-851,000	-2,544,000
Change in expected cash flows		-517,000	-3,472,000	-3,761,000
Change in FDIC true-up provision		-316,000	-635,000	-514,000
Balance, end of period		$6,997,000	$14,347,000	$21,774,000

Deposits_Details

Deposits (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Deposits [Abstract]
Noninterest-bearing demand	$2,748,635	$2,663,503
Interest-bearing demand	1,722,581	1,923,701
Savings	3,280,060	2,997,294
Time	1,947,082	2,275,404
Total deposits	9,698,358	9,859,902
Interest expense on deposits by type [Abstract]
Interest-bearing demand	3,151	3,948	3,975
Savings	2,949	3,889	6,004
Time	9,223	11,881	14,625
Total	15,323	19,718	24,604
Maturities of time deposits of $ 100000 or more [Abstract]
3 months or less	199,087	242,757
Over 3 months through 6 months	168,886	208,863
Over 6 months through 12 months	227,130	312,189
Over 12 months	222,119	208,208
Total	817,222	972,017
Maturities of interest-bearing deposits [Abstract]
2015	1,462,039
2016	272,973
2017	114,574
2018	52,329
2019 and thereafter	45,167
Total time deposits	1,947,082	2,275,404
Interest-bearing deposits with no stated maturity	5,002,641
Total interest-bearing deposits	$6,949,723	$7,196,399

Borrowings_Details

Borrowings (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	Loan	Dec. 31, 2013	Dec. 31, 2012
Short-Term Borrowings [Abstract]
Total short-term borrowings	$425,077,000	$66,385,000
Fair Market Value Adjustment [Member]
Short-Term Borrowings [Abstract]
Total short-term borrowings	178,000	28,000
Atlanta [Member]
Short-Term Borrowings [Abstract]
Number of outstanding short-term FHLB advances	2
Interest expense, short-term borrowings	197,000	6,000	81,000
Dallas [Member]
Short-Term Borrowings [Abstract]
Additional debt instrument borrowing capacity	1,678,000,000	1,768,000,000
Federal Home Loan Bank Advances [Member]
Short-Term Borrowings [Abstract]
Total short-term borrowings	356,758,000	2,062,000
Federal Home Loan Bank Advances [Member] \| Atlanta [Member]
Short-Term Borrowings [Abstract]
Number of outstanding short-term FHLB advances		2
Weighted average remaining maturity	297 days	134 days
Weighted average cost related to FHLB advances (in hundredths)	3.96%	4.24%
Federal Home Loan Bank Advances [Member] \| Dallas [Member]
Short-Term Borrowings [Abstract]
Number of outstanding short-term FHLB advances	4
Total short-term borrowings	350,000,000	0
Weighted average remaining maturity	9 days
Weighted average cost related to FHLB advances (in hundredths)	0.14%
Federal Home Loan Bank Advances [Member] \| Dallas [Member] \| Maximum [Member]
Short-Term Borrowings [Abstract]
Total short-term borrowings	100,000,000
Interest rate (in hundredths)	0.18%
Federal Home Loan Bank Advances [Member] \| Dallas [Member] \| Minimum [Member]
Short-Term Borrowings [Abstract]
Total short-term borrowings	50,000,000
Interest rate (in hundredths)	0.10%
Federal Home Loan Bank Advances [Member] \| Advance One [Member] \| Atlanta [Member]
Short-Term Borrowings [Abstract]
Total short-term borrowings	80,000	2,000,000
Interest rate (in hundredths)	6.95%	4.21%
Federal Home Loan Bank Advances [Member] \| Advance Two [Member] \| Atlanta [Member]
Short-Term Borrowings [Abstract]
Total short-term borrowings	6,500,000	34,000
Interest rate (in hundredths)	3.92%	6.11%
Serviced GNMA Loans Eligible for Repurchase [Member]
Short-Term Borrowings [Abstract]
Total short-term borrowings	41,014,000	38,036,000
Other [Member]
Short-Term Borrowings [Abstract]
Total short-term borrowings	$27,305,000	$26,287,000

Borrowings_Longterm_Debt_Instr

Borrowings, Long-term Debt Instruments (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	Loan	Loan	Dec. 31, 2012
Long-Term Borrowings [Abstract]
Long-term FHLB advance	$1,253,000	$8,458,000
Subordinated notes	49,936,000	49,904,000
Federal Home Loan Bank Advances [Member] \| Fair Market Value Adjustment [Member]
Long-Term Borrowings [Abstract]
Long-term FHLB advance	7,000	412,000
Federal Home Loan Bank Advances [Member] \| Atlanta [Member]
Long-Term Borrowings [Abstract]
Number of outstanding long-term FHLB advances	4	6
Long-term FHLB advance	1,200,000	8,500,000
Weighted average remaining maturity	7 years 1 month 17 days	2 years 10 months 6 days
Weighted average cost related to FHLB advances (in hundredths)	1.11%	3.55%
Interest expense, long-term	45,000	57,000	0
Federal Home Loan Bank Advances [Member] \| Atlanta [Member] \| Minimum [Member]
Long-Term Borrowings [Abstract]
Long-term FHLB advance	23,000	30,000
Interest rate (in hundredths)	0.08%	0.08%
Federal Home Loan Bank Advances [Member] \| Atlanta [Member] \| Maximum [Member]
Long-Term Borrowings [Abstract]
Long-term FHLB advance	913,000	6,500,000
Interest rate (in hundredths)	6.50%	6.95%
Subordinated Notes Payable [Member]
Long-Term Borrowings [Abstract]
Interest rate (in hundredths)	5.67%
Face amount of debt issued	50,000,000
Maturity date	15-Dec-16
Subordinated notes	$49,900,000	$49,900,000
Percentage of debt qualify as Tier 2 Capital (in hundredths)	20.00%
Subordinated Notes Payable [Member] \| Minimum [Member]
Long-Term Borrowings [Abstract]
Maturity period	1 year
Subordinated Notes Payable [Member] \| Maximum [Member]
Long-Term Borrowings [Abstract]
Maturity period	2 years

Borrowings_Junior_Subordinated

Borrowings, Junior Subordinated Debt Securities (Details) (USD $)	12 Months Ended			0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Aug. 18, 2006
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Quarter
Variable Interest Entity [Line Items]
Junior subordinated debt securities	$61,856,000	$61,856,000
Total assets	12,250,633,000	11,790,383,000
Total liabilities and shareholders' equity	12,250,633,000	11,790,383,000
Common securities	14,060,000	14,038,000
Net income	123,562,000	117,060,000	117,283,000
Trustmark Preferred Capital Trust I [Member]
Variable Interest Entity [Line Items]
Total assets	61,900,000	61,900,000
Total liabilities and shareholders' equity	61,900,000	61,900,000
Common securities	1,900,000	1,900,000
Net income	36,800	37,600	41,300
Dividends paid	36,800	37,600	41,300
Trustmark Preferred Capital Trust I [Member] \| Junior Subordinated Debt Securities [Member]
Variable Interest Entity [Line Items]
Face amount of debt issued				60,000,000
Maturity date				30-Sep-36
Variable interest rate, description				three-month LIBOR
Basis spread over LIBOR rate (in hundredths)				1.72%
Junior subordinated debt securities				$61,900,000
Consecutive quarters that Trustmark may defer interest payments				20

Income_Taxes_Details

Income Taxes (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current [Abstract]
Federal	$17,761	$14,537	$48,186
State	2,068	1,237	2,366
Deferred [Abstract]
Federal	16,256	18,394	-7,349
State	2,444	2,769	-1,103
Income tax provision	38,529	36,937	42,100
Reconciliation of provision for tax from the federal rate to the effective tax rate [Abstract]
Income tax computed at statutory tax rate	56,732	53,899	55,784
Tax exempt interest	-5,612	-5,222	-5,150
Nondeductible interest expense	107	121	144
State income taxes, net	2,933	2,604	821
Income tax credits	-15,212	-15,755	-9,255
Other	-419	1,290	-244
Income tax provision	38,529	36,937	42,100
Statutory federal income tax rate (in hundredths)	35.00%	35.00%	35.00%
Deferred tax assets [Abstract]
Loan purchase accounting	38,471	63,048
Other real estate	36,086	47,981
Allowance for loan losses	31,241	29,102
Deferred compensation	20,825	20,000
Realized built in losses	15,907	9,182
Securities	15,443	17,741
Pension and other postretirement benefit plans	14,904	7,511
Nonaccrual loans	3,372	4,452
Stock-based compensation	3,077	3,357
Other	17,833	14,771
Gross deferred tax asset	197,159	217,145
Valuation allowance	-8,650	-16,000
Deferred tax asset net of valuation allowance	188,509	201,145
Deferred tax liabilities [Abstract]
Goodwill and other identifiable intangibles	28,010	29,809
Premises and equipment	20,813	21,543
Unrealized gains on securities available for sale	8,627	1,969
Mortgage servicing rights	7,747	8,145
Securities	1,353	1,270
Leases	625	3,290
Other	3,900	4,642
Gross deferred tax liability	71,075	70,668
Net deferred tax asset	117,434	130,477
Changes in unrecognized tax benefits [Roll Forward]
Balance at beginning of period	1,779
Increases due to tax positions taken during the current year	670
Increases due to tax positions taken during a prior year	60
Decreases due to the lapse of applicable statute of limitations during the current year	-306
Decreases due to settlements with taxing authorities during the current year	-43
Balance at end of period	2,160	1,779
Accrued interest, net of federal benefit, at end of period	437
Unrecognized tax benefits that would impact the effective tax rate, if recognized, at end of period	$1,603

Defined_Benefit_and_Other_Post2

Defined Benefit and Other Postretirement Benefits (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Trustmark Capital Accumulation Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Years of service required to vest	3 years
Change in benefit obligation [Roll Forward]
Benefit obligation, beginning of year	$128,974,000	$103,235,000
Benefit obligation from business combination	0	43,138,000
Service cost	495,000	595,000	547,000
Interest cost	5,299,000	4,758,000	3,942,000
Actuarial loss (gain)	11,675,000	-8,060,000
Benefits paid	-7,041,000	-14,692,000
Settlement loss from BancTrust termination	1,355,000	0
Benefit obligation, end of year	101,904,000	128,974,000	103,235,000
Change in plan assets [ Roll Forward]
Fair value of plan assets, beginning of year	126,142,000	76,660,000
Fair value of plan assets from business combination	0	40,391,000
Actual return on plan assets	4,632,000	21,661,000
Employer contributions	1,407,000	2,122,000
Benefit payments	-7,041,000	-14,692,000
Fair value of plan assets, end of year	86,287,000	126,142,000	76,660,000
Funded status at end of year - net liability	-15,617,000	-2,832,000
Balance, end of period	86,287,000	126,142,000	76,660,000
Amounts recognized in accumulated other comprehensive income (loss) [Abstract]
Net loss	28,100,000	15,436,000
Net periodic benefit cost [Abstract]
Service cost	495,000	595,000	547,000
Interest cost	5,299,000	4,758,000	3,942,000
Expected return on plan assets	-6,245,000	-7,720,000	-5,983,000
Recognized net loss due to BancTrust termination	1,355,000	0	0
Recognized net loss due to lump sum settlements	905,000	2,225,000	0
Recognized net actuarial (gain) loss	-283,000	5,516,000	5,225,000
Net periodic benefit cost	1,526,000	5,374,000	3,731,000
Other changes in plan assets and benefit obligation recognized in other comprehensive (loss), before taxes [Abstract]
Total recognized in other comprehensive income (loss)	12,664,000	-29,742,000	-3,861,000
Total recognized in net periodic benefit cost and other comprehensive income (loss)	14,190,000	-24,368,000	-130,000
Weighted-average assumptions as of end of year [Abstract]
Discount rate for benefit obligation (in hundredths)	3.57%	4.30%	3.50%
Discount rate for net periodic benefit cost (in hundredths)	4.30%	3.50%	4.00%
Expected long-term return on plan assets (in hundredths)	7.50%	7.50%	8.00%
Asset target allocations [Abstract]
Weighted-average asset allocation (in hundredths)	100.00%	100.00%
Fair value of plan assets	86,287,000	126,142,000	76,660,000
Contributions [Abstract]
Expected minimum required contribution, Prior to HAFTA	1,800,000	2,100,000
Expected minimum required contribution in the next fiscal year	0
Expected minimum required contribution, after HAFTA	0
Actual contribution	1,000,000
Estimated future benefit payments [Abstract]
2015	10,654,000
2016	8,402,000
2017	7,734,000
2018	6,346,000
2019	6,286,000
2020 - 2024	28,762,000
Accumulated other comprehensive loss expected to be recognized during next fiscal year as components of net periodic benefit cost	-5,000,000
Other Benefit Plans - Defined Contribution Plan [Abstract]
Trustmarks contribution to defined contribution plan	6,700,000	6,800,000	5,700,000
Trustmark contributions to the plan	100.00%
Contributions up to a maximum of eligible compensation	6.00%
Period when associates may become eligible to make elective deferral contributions after employment	30 days
Eligible associates must complete number of years of service	1 year
Trustmark Capital Accumulation Plan [Member] \| Level 1 [ Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	86,133,000	118,999,000
Balance, end of period	86,133,000	118,999,000
Asset target allocations [Abstract]
Fair value of plan assets	86,133,000	118,999,000
Trustmark Capital Accumulation Plan [Member] \| Level 2 [Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	0	6,980,000
Balance, end of period	0	6,980,000
Asset target allocations [Abstract]
Fair value of plan assets	0	6,980,000
Trustmark Capital Accumulation Plan [Member] \| Level 3 [Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	154,000	163,000
Balance, end of period	154,000	163,000
Asset target allocations [Abstract]
Fair value of plan assets	154,000	163,000
Trustmark Capital Accumulation Plan [Member] \| Money Market Funds [Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	7,544,000	6,563,000
Balance, end of period	7,544,000	6,563,000
Asset target allocations [Abstract]
Weighted-average asset allocation (in hundredths)	8.70%	5.20%
Fair value of plan assets	7,544,000	6,563,000
Trustmark Capital Accumulation Plan [Member] \| Money Market Funds [Member] \| Level 1 [ Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	7,544,000	6,563,000
Balance, end of period	7,544,000	6,563,000
Asset target allocations [Abstract]
Fair value of plan assets	7,544,000	6,563,000
Trustmark Capital Accumulation Plan [Member] \| Money Market Funds [Member] \| Level 2 [Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	0	0
Balance, end of period	0	0
Asset target allocations [Abstract]
Fair value of plan assets	0	0
Trustmark Capital Accumulation Plan [Member] \| Money Market Funds [Member] \| Level 3 [Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	0	0
Balance, end of period	0	0
Asset target allocations [Abstract]
Fair value of plan assets	0	0
Trustmark Capital Accumulation Plan [Member] \| Fixed Income Mutual Funds [Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	10,267,000	22,225,000
Balance, end of period	10,267,000	22,225,000
Asset target allocations [Abstract]
Weighted-average asset allocation (in hundredths)	11.90%	17.60%
Fair value of plan assets	10,267,000	22,225,000
Trustmark Capital Accumulation Plan [Member] \| Fixed Income Mutual Funds [Member] \| Level 1 [ Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	10,267,000	15,245,000
Balance, end of period	10,267,000	15,245,000
Asset target allocations [Abstract]
Fair value of plan assets	10,267,000	15,245,000
Trustmark Capital Accumulation Plan [Member] \| Fixed Income Mutual Funds [Member] \| Level 2 [Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	0	6,980,000
Balance, end of period	0	6,980,000
Asset target allocations [Abstract]
Fair value of plan assets	0	6,980,000
Trustmark Capital Accumulation Plan [Member] \| Fixed Income Mutual Funds [Member] \| Level 3 [Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	0	0
Balance, end of period	0	0
Asset target allocations [Abstract]
Fair value of plan assets	0	0
Trustmark Capital Accumulation Plan [Member] \| Equity Mutual Funds [Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	62,265,000	73,608,000
Balance, end of period	62,265,000	73,608,000
Asset target allocations [Abstract]
Weighted-average asset allocation (in hundredths)	72.20%	58.40%
Fair value of plan assets	62,265,000	73,608,000
Trustmark Capital Accumulation Plan [Member] \| Equity Mutual Funds [Member] \| Level 1 [ Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	62,265,000	73,608,000
Balance, end of period	62,265,000	73,608,000
Asset target allocations [Abstract]
Fair value of plan assets	62,265,000	73,608,000
Trustmark Capital Accumulation Plan [Member] \| Equity Mutual Funds [Member] \| Level 2 [Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	0	0
Balance, end of period	0	0
Asset target allocations [Abstract]
Fair value of plan assets	0	0
Trustmark Capital Accumulation Plan [Member] \| Equity Mutual Funds [Member] \| Level 3 [Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	0	0
Balance, end of period	0	0
Asset target allocations [Abstract]
Fair value of plan assets	0	0
Trustmark Capital Accumulation Plan [Member] \| Equity Securities [Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	6,057,000	23,583,000
Balance, end of period	6,057,000	23,583,000
Asset target allocations [Abstract]
Weighted-average asset allocation (in hundredths)	7.00%	18.70%
Fair value of plan assets	6,057,000	23,583,000
Trustmark Capital Accumulation Plan [Member] \| Equity Securities [Member] \| Level 1 [ Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	6,057,000	23,583,000
Balance, end of period	6,057,000	23,583,000
Asset target allocations [Abstract]
Fair value of plan assets	6,057,000	23,583,000
Trustmark Capital Accumulation Plan [Member] \| Equity Securities [Member] \| Level 2 [Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	0	0
Balance, end of period	0	0
Asset target allocations [Abstract]
Fair value of plan assets	0	0
Trustmark Capital Accumulation Plan [Member] \| Equity Securities [Member] \| Level 3 [Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	0	0
Balance, end of period	0	0
Asset target allocations [Abstract]
Fair value of plan assets	0	0
Trustmark Capital Accumulation Plan [Member] \| Fixed Income Hedge Funds [Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	154,000	163,000
Balance, end of period	154,000	163,000
Asset target allocations [Abstract]
Weighted-average asset allocation (in hundredths)	0.20%	0.10%
Fair value of plan assets	154,000	163,000
Trustmark Capital Accumulation Plan [Member] \| Fixed Income Hedge Funds [Member] \| Level 1 [ Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	0	0
Balance, end of period	0	0
Asset target allocations [Abstract]
Fair value of plan assets	0	0
Trustmark Capital Accumulation Plan [Member] \| Fixed Income Hedge Funds [Member] \| Level 2 [Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, end of year	0	0
Balance, end of period	0	0
Asset target allocations [Abstract]
Fair value of plan assets	0	0
Trustmark Capital Accumulation Plan [Member] \| Fixed Income Hedge Funds [Member] \| Level 3 [Member]
Change in plan assets [ Roll Forward]
Fair value of plan assets, beginning of year	163,000	163,000
Fair value of plan assets, end of year	154,000	163,000
Change in fair value	-9,000	0
Balance, end of period	154,000	163,000
Asset target allocations [Abstract]
Fair value of plan assets	154,000	163,000
Trustmark Capital Accumulation Plan [Member] \| Cash and Cash Equivalents [Member]
Asset target allocations [Abstract]
Target asset allocation, minimum (in hundredths)	0.00%
Target asset allocation, maximum (in hundredths)	10.00%
Trustmark Capital Accumulation Plan [Member] \| Fixed Income Funds [Member]
Asset target allocations [Abstract]
Target asset allocation, minimum (in hundredths)	10.00%
Target asset allocation, maximum (in hundredths)	30.00%
Trustmark Capital Accumulation Plan [Member] \| Domestic Equity [Member]
Asset target allocations [Abstract]
Target asset allocation, minimum (in hundredths)	30.00%
Target asset allocation, maximum (in hundredths)	55.00%
Trustmark Capital Accumulation Plan [Member] \| International Equity [Member]
Asset target allocations [Abstract]
Target asset allocation, minimum (in hundredths)	10.00%
Target asset allocation, maximum (in hundredths)	30.00%
Trustmark Capital Accumulation Plan [Member] \| Other Investments [Member]
Asset target allocations [Abstract]
Target asset allocation, minimum (in hundredths)	0.00%
Target asset allocation, maximum (in hundredths)	20.00%
Supplemental Retirement Plans [Member]
Change in benefit obligation [Roll Forward]
Benefit obligation, beginning of year	52,489,000	56,619,000
Benefit obligation from business combination	0	1,658,000
Service cost	296,000	597,000	679,000
Interest cost	2,198,000	1,943,000	2,067,000
Actuarial loss (gain)	7,392,000	-4,187,000
Benefits paid	-2,631,000	-4,141,000
Prior service cost due to amendment	0	0
Benefit obligation, end of year	59,744,000	52,489,000	56,619,000
Change in plan assets [ Roll Forward]
Fair value of plan assets, beginning of year	0	0
Employer contributions	2,631,000	4,141,000
Benefit payments	-2,631,000	-4,141,000
Fair value of plan assets, end of year	0	0	0
Funded status at end of year - net liability	-59,744,000	-52,489,000
Balance, end of period	0	0	0
Amounts recognized in accumulated other comprehensive income (loss) [Abstract]
Net loss	21,242,000	14,509,000
Prior service cost	1,860,000	2,110,000
Amounts recognized	23,102,000	16,619,000
Net periodic benefit cost [Abstract]
Service cost	296,000	597,000	679,000
Interest cost	2,198,000	1,943,000	2,067,000
Amortization of prior service credits	250,000	250,000	250,000
Recognized net actuarial (gain) loss	661,000	1,038,000	861,000
Net periodic benefit cost	3,405,000	3,828,000	3,857,000
Other changes in plan assets and benefit obligation recognized in other comprehensive (loss), before taxes [Abstract]
Net (gain) loss	6,733,000	-5,224,000	2,507,000
Prior service cost	0	0	198,000
Amortization of prior service cost	-250,000	-250,000	-250,000
Total recognized in other comprehensive income (loss)	6,483,000	-5,474,000	2,455,000
Total recognized in net periodic benefit cost and other comprehensive income (loss)	9,888,000	-1,646,000	6,312,000
Weighted-average assumptions as of end of year [Abstract]
Discount rate for benefit obligation (in hundredths)	3.57%	4.30%	3.50%
Discount rate for net periodic benefit cost (in hundredths)	4.30%	3.50%	4.00%
Asset target allocations [Abstract]
Fair value of plan assets	0	0	0
Estimated future benefit payments [Abstract]
2015	2,868,000
2016	3,145,000
2017	3,479,000
2018	3,591,000
2019	3,656,000
2020 - 2024	19,504,000
Accumulated other comprehensive loss expected to be recognized during next fiscal year as components of net periodic benefit cost	-992,000
Accumulated other comprehensive loss expected to be recognized during next fiscal year as prior service cost	250,000
BancTrust Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pre-tax gain recognized in OCI as a result of the termination of the plan	1,200,000
Change in benefit obligation [Roll Forward]
Benefits paid	-38,853,000	0
Change in plan assets [ Roll Forward]
Benefit payments	-38,853,000	0
Other Benefit Plans - Defined Contribution Plan [Abstract]
Contribution to complete the plan termination	$334,000

Stock_and_Incentive_Compensati2

Stock and Incentive Compensation Plans (Details) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Options [Roll Forward]
Outstanding, beginning of year (in shares)	105,450	699,600	1,205,100
Exercised (in shares)	0	-187,300	-11,125
Expired (in shares)	-105,450	-406,850	-494,375
Outstanding, end of year (in shares)	0	105,450	699,600
Exercisable, end of year (in shares)	0	105,450	699,600
Average Option Price [Abstract]
Outstanding, beginning of year (in dollars per share)	$27.43	$27.58	$27.31
Exercised (in dollars per share)	$0	$26.96	$24.09
Expired (in dollars per share)	$27.43	$27.90	$27.01
Outstanding, end of year (in dollars per share)	$0	$27.43	$27.58
Exercisable, end of year (in dollars per share)	$0	$27.43	$27.58
Compensation expense for all stock incentive plans [Abstract]
Recognized compensation expense	$4,152	$3,599	$3,973
Unrecognized compensation expense	4,816
Performance Based Award [Member]
Shares [Roll Forward]
Nonvested shares, beginning of year (in shares)	160,520	159,583	179,421
Granted (in shares)	73,726	62,119	55,295
Released from restriction (in shares)	-38,580	-54,784	-72,632
Forfeited (in shares)	-14,471	-6,398	-2,501
Nonvested shares, end of year (in shares)	181,195	160,520	159,583
Weighted-Average Grant Date Fair Value [Abstract]
Nonvested shares, beginning of year (in dollars per share)	$25.20	$24.26	$20.30
Granted (in dollars per share)	$25.58	$23.65	$25.66
Released from restriction (in dollars per share)	$25.40	$24.15	$21.38
Forfeited (in dollars per share)	$24.86	$25.42	$24.70
Nonvested shares, end of year (in dollars per share)	$24.98	$25.20	$24.26
Compensation expense for all stock incentive plans [Abstract]
Recognized compensation expense	1,065	825	868
Unrecognized compensation expense	1,197
Weighted average life of unrecognized compensation expense	1 year 8 months 23 days
Performance Awards Includes Achievement Shares for Grants after 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Achievement Shares from Performance Grants Prior to 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Time-vested Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Shares [Roll Forward]
Nonvested shares, beginning of year (in shares)	291,634	317,573	334,356
Granted (in shares)	105,690	112,964	141,616
Released from restriction (in shares)	-124,869	-122,727	-151,331
Forfeited (in shares)	-8,550	-16,176	-7,068
Nonvested shares, end of year (in shares)	263,905	291,634	317,573
Weighted-Average Grant Date Fair Value [Abstract]
Nonvested shares, beginning of year (in dollars per share)	$24.48	$23.28	$21.04
Granted (in dollars per share)	$24.91	$24.47	$24.66
Released from restriction (in dollars per share)	$24.74	$24.40	$23.14
Forfeited (in dollars per share)	$24.77	$25.14	$24.14
Nonvested shares, end of year (in dollars per share)	$24.66	$24.48	$23.28
Compensation expense for all stock incentive plans [Abstract]
Recognized compensation expense	3,087	2,774	3,105
Unrecognized compensation expense	3,619
Weighted average life of unrecognized compensation expense	1 year 9 months 4 days
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ROATE Performance measure (in hundredths)	100.00%
TSR Performance measure (in hundredths)	100.00%
Stock Option-based Awards [Member]
Average Option Price [Abstract]
Total intrinsic value of options exercised	$0	$191	$16
1997 Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Stock and incentive compensation plan, contractual term	10 years
2005 Stock and Incentive Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock available for issuance (in shares)	5,466,172
Vesting period	5 years
Stock and incentive compensation plan, contractual term	7 years

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	12 Months Ended
Commitments and Contingencies (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Loss Contingencies [Line Items]
Unused commitments to extend credit	$2,489,000,000	$2,193,000,000
Lease Commitments [Abstract]
Rental expense	8,500,000	8,400,000	7,400,000
Future minimum rental commitments under noncancellable operating leases [Abstract]
2015	6,010,000
2016	4,034,000
2017	3,568,000
2018	3,140,000
2019	2,585,000
Thereafter	11,960,000
Total	31,297,000
Standby Letters of Credit [Member]
Loss Contingencies [Line Items]
Maximum potential exposure to credit loss in the event of nonperformance	132,800,000	143,200,000
Letters of credit, maturity term - maximum	3 years
Collateral held, fair value	31,500,000
Pending or Threatened Litigation, Stanford Financial Group [Member]
Legal Proceedings [Abstract]
Lawsuits naming entity as defendant, number	2
Pending or Threatened Litigation, Overdraft Fees [Member]
Legal Proceedings [Abstract]
Lawsuits naming entity as defendant, number	2
Litigation settlement amount	4,000,000
Litigation settlement amount, net of taxes	$2,500,000
Potential claims resolved by settlement	100,000
Number of customers excluded themselves from the class action settlement	16

Shareholders_Equity_Details

Shareholders' Equity (Details) (USD $)	12 Months Ended
Shareholders' Equity (Details) (USD $)	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Securities available for sale and transferred securities, Before tax amount [Abstract]
Unrealized holding (losses) gains arising during the period, Before tax amount	$17,705,000		($67,135,000)		$97,000
Reclassification adjustment for net gains realized in net income, Before tax amount	-300,000		-485,000		-1,059,000
Change in net unrealized holding loss on securities transferred to held to maturity, Before tax amount	6,010,000		-46,383,000
Total securities available for sale and transferred securities, Before tax amount	23,415,000		-114,003,000		-962,000
Securities available for sale and transferred securities, Tax (expense) benefit [Abstract]
Unrealized holding losses (gains) arising during the period, Tax (expense) benefit	-6,772,000		25,679,000		-37,000
Reclassification adjustment for net gains realized in net income, Tax (expense) benefit	115,000		186,000		405,000
Change in net unrealized holding loss on securities transferred to held to maturity, Tax (expense) benefit	-2,299,000		17,741,000
Total securities available for sale and transferred securities, Tax (expense) benefit	-8,956,000		43,606,000		368,000
Securities available for sale and transferred securities, Net of tax amount: [Abstract]
Unrealized holding (losses) gains arising during the period, after tax income (expense)	10,933,000		-41,456,000		60,000
Reclassification adjustment for net gains realized in net income, after tax income (expense)	-185,000		-299,000		-654,000
Change in net unrealized holding loss on securities transferred to held to maturity, after tax income (expense)	3,711,000		-28,642,000		0
Total securities available for sale and transferred securities, after tax income (expense)	14,459,000		-70,397,000		-594,000
Pension and other postretirement benefit plans, Before tax amount: [Abstract]
Net change in prior service costs, before tax amount	249,000		251,000		52,000
Recognized net loss due to BancTrust terminations, before tax amount	1,355,000
Recognized net loss due to lump sum settlements, before tax amount	905,000		2,225,000
Recognized net actuarial (loss) gain, before tax amount	-21,657,000		32,742,000		1,354,000
Total pension and other postretirement benefit plans, before tax amount	-19,148,000		35,218,000		1,406,000
Pension and other postretirement benefit plans, Tax (expense) benefit: [Abstract]
Net change in prior service costs, tax (expense) benefit	-95,000		-96,000		-20,000
Recognized net loss due to BancTrust Terminations, tax (expense) benefit	-518,000
Recognized net loss due to lump sum settlement, tax (expense) benefit	-346,000		-851,000
Recognized net actuarial (loss) gain, tax (expense) benefit	8,283,000		-12,524,000		-518,000
Total pension and other postretirement benefit plans, tax (expense) benefit	7,324,000		-13,471,000		-538,000
Pension and other postretirement benefit plans, Net of tax amount [Abstract]
Net change in prior service costs, after tax income (expense)	154,000		155,000		32,000
Recognized net loss due to BancTrust terminations after tax income (expense)	837,000
Recognized net loss due to settlement after tax income (expense)	559,000		1,374,000		0
Recognized net actuarial (loss) gain, after tax income (expense)	-13,374,000		20,218,000		836,000
Total pension and other postretirement benefit plans, after tax income (expense)	-11,824,000		21,747,000		868,000
Derivatives, Before tax amount: [Abstract]
Change in accumulated gain on effective cash flow hedge derivatives, before tax amount	-2,246,000		2,468,000
Reclassification adjustment for loss realized in net income, before tax amount	-2,000
Total cash flow hedge derivatives, before tax benefit	-2,248,000
Derivatives, Tax (expense) benefit: [Abstract]
Change in accumulated gain on effective cash flow hedge derivatives, tax (expense) benefit	859,000		-944,000
Reclassification adjustment for loss realized in net income, tax (expense) benefit	1,000
Total cash flow hedge derivatives, tax (expense) benefit	860,000
Derivatives, Net of tax amount: [Abstract]
Change in the accumulated gain on effective cash flow hedge derivatives, after tax amount	-1,387,000		1,524,000		0
Reclassification adjustment for loss realized in net income, after tax amount	-1,000		0		0
Total cash flow hedge derivatives, after tax amount	-1,388,000		1,524,000
Total other comprehensive income (loss), Before tax amount	2,019,000		-76,317,000		444,000
Total other comprehensive income (loss), Tax expense (benefit)	-772,000		29,191,000		-170,000
Total other comprehensive income (loss), Net of tax	1,247,000		-47,126,000		274,000
Accumulated Other Comprehensive Income (Loss) [Line Items]
Opening balance	-43,731,000		3,395,000		3,121,000
Other comprehensive income (loss) before reclassification	1,433,000		-46,827,000		928,000
Amounts reclassified from accumulated other comprehensive income (loss)	-186,000		-299,000		-654,000
Net other comprehensive (loss) income	1,247,000		-47,126,000		274,000
Ending balance	-42,484,000		-43,731,000		3,395,000
Securities Available for Sale and Transferred Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Opening balance	-25,462,000		44,935,000		45,529,000
Other comprehensive income (loss) before reclassification	14,644,000		-70,098,000		60,000
Amounts reclassified from accumulated other comprehensive income (loss)	-185,000		-299,000		-654,000
Net other comprehensive (loss) income	14,459,000		-70,397,000		-594,000
Ending balance	-11,003,000		-25,462,000		44,935,000
Defined Benefit Pension Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Opening balance	-19,793,000		-41,540,000		-42,408,000
Other comprehensive income (loss) before reclassification	-11,824,000		21,747,000		868,000
Amounts reclassified from accumulated other comprehensive income (loss)	0		0		0
Net other comprehensive (loss) income	-11,824,000		21,747,000		868,000
Ending balance	-31,617,000		-19,793,000		-41,540,000
Cash Flow Hedge Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Opening balance	1,524,000		0		0
Other comprehensive income (loss) before reclassification	-1,387,000		1,524,000		0
Amounts reclassified from accumulated other comprehensive income (loss)	-1,000		0		0
Net other comprehensive (loss) income	-1,388,000		1,524,000		0
Ending balance	136,000		1,524,000		0
Common Shares [Member]
Dividends on common stock [Abstract]
Dividend potential for next fiscal year	114,300,000
Period for which retained net income considered for approval	2 years
Trustmark Corporation [Member] \| Total Capital (to Risk Weighted Assets) [Member]
Total Capital (to Risk Weighted Assets) [Abstract]
Actual Regulatory Capital Amount	1,221,292,000		1,122,904,000
Actual Regulatory Capital Ratio (in hundredths)	14.56%		14.18%
Minimum Regulatory Capital Required Amount	671,024,000		633,310,000
Minimum Regulatory Capital Required Ratio (in hundredths)	8.00%		8.00%
Minimum Regulatory Provision to be Well-Capitalized Amount		[1]		[1]
Minimum Regulatory Provision to be Well-Capitalized Ratio (in hundredths)		[1]		[1]
Trustmark Corporation [Member] \| Tier 1 Capital (to Risk Weighted Assets) [Member]
Tier 1 Capital (to Risk Weighted Assets) [Abstract]
Actual Regulatory Capital Amount	1,129,630,000		1,026,858,000
Actual Regulatory Capital Ratio (in hundredths)	13.47%		12.97%
Minimum Regulatory Capital Required Amount	335,512,000		316,655,000
Minimum Regulatory Capital Required Ratio (in hundredths)	4.00%		4.00%
Minimum Regulatory Provision to be Well-Capitalized Amount		[1]		[1]
Minimum Regulatory Provision to be Well-Capitalized Ratio (in hundredths)		[1]		[1]
Trustmark Corporation [Member] \| Tier 1 Capital (to Average Assets) [Member]
Tier 1 Capital (to Average Assets) [Abstract]
Actual Regulatory Capital Amount	1,129,630,000		1,026,858,000
Actual Regulatory Capital Ratio (in hundredths)	9.63%		9.06%
Minimum Regulatory Capital Required Amount	469,411,000		453,487,000
Minimum Regulatory Capital Required Ratio (in hundredths)	4.00%		4.00%
Minimum Regulatory Provision to be Well-Capitalized Amount		[1]		[1]
Minimum Regulatory Provision to be Well-Capitalized Ratio (in hundredths)		[1]		[1]
Trustmark National Bank [Member] \| Total Capital (to Risk Weighted Assets) [Member]
Total Capital (to Risk Weighted Assets) [Abstract]
Actual Regulatory Capital Amount	1,198,697,000		1,076,391,000
Actual Regulatory Capital Ratio (in hundredths)	14.32%		13.74%
Minimum Regulatory Capital Required Amount	669,856,000		626,672,000
Minimum Regulatory Capital Required Ratio (in hundredths)	8.00%		8.00%
Minimum Regulatory Provision to be Well-Capitalized Amount	837,320,000		783,340,000
Minimum Regulatory Provision to be Well-Capitalized Ratio (in hundredths)	10.00%		10.00%
Trustmark National Bank [Member] \| Tier 1 Capital (to Risk Weighted Assets) [Member]
Tier 1 Capital (to Risk Weighted Assets) [Abstract]
Actual Regulatory Capital Amount	1,108,399,000		982,925,000
Actual Regulatory Capital Ratio (in hundredths)	13.24%		12.55%
Minimum Regulatory Capital Required Amount	334,928,000		313,336,000
Minimum Regulatory Capital Required Ratio (in hundredths)	4.00%		4.00%
Minimum Regulatory Provision to be Well-Capitalized Amount	502,392,000		470,004,000
Minimum Regulatory Provision to be Well-Capitalized Ratio (in hundredths)	6.00%		6.00%
Trustmark National Bank [Member] \| Tier 1 Capital (to Average Assets) [Member]
Tier 1 Capital (to Average Assets) [Abstract]
Actual Regulatory Capital Amount	1,108,399,000		982,925,000
Actual Regulatory Capital Ratio (in hundredths)	9.46%		8.76%
Minimum Regulatory Capital Required Amount	468,783,000		448,665,000
Minimum Regulatory Capital Required Ratio (in hundredths)	4.00%		4.00%
Minimum Regulatory Provision to be Well-Capitalized Amount	$585,979,000		$560,831,000
Minimum Regulatory Provision to be Well-Capitalized Ratio (in hundredths)	5.00%		5.00%

[1]	n/a

Fair_Value_Part_1_Details

Fair Value Part 1 (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$2,374,567	$2,194,154
Loans held for sale	132,196	149,169
Mortgage servicing rights	64,358	67,834	47,341
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
U.S. Treasury securities	100	502
U.S. Government agency obligations	112,474	169,472
Obligations of states and political subdivisions	162,258	171,738
Mortgage-backed securities	2,068,035	1,788,505
Asset-backed securities and structured financial products	31,700	63,937
Securities available for sale	2,374,567	2,194,154
Loans held for sale	132,196	149,169
Mortgage servicing rights	64,358	67,834
Other assets - derivatives	5,527	4,994
Other liabilities - derivatives	4,338	3,298
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
U.S. Treasury securities	0	0
U.S. Government agency obligations	0	0
Obligations of states and political subdivisions	0	0
Mortgage-backed securities	0	0
Asset-backed securities and structured financial products	0	0
Securities available for sale	0	0
Loans held for sale	0	0
Mortgage servicing rights	0	0
Other assets - derivatives	1,181	-2,579
Other liabilities - derivatives	490	581
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
U.S. Treasury securities	100	502
U.S. Government agency obligations	112,474	169,472
Obligations of states and political subdivisions	162,258	171,738
Mortgage-backed securities	2,068,035	1,788,505
Asset-backed securities and structured financial products	31,700	63,937
Securities available for sale	2,374,567	2,194,154
Loans held for sale	132,196	149,169
Mortgage servicing rights	0	0
Other assets - derivatives	3,047	7,447
Other liabilities - derivatives	3,848	2,717
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
U.S. Treasury securities	0	0
U.S. Government agency obligations	0	0
Obligations of states and political subdivisions	0	0
Mortgage-backed securities	0	0
Asset-backed securities and structured financial products	0	0
Securities available for sale	0	0
Loans held for sale	0	0
Mortgage servicing rights	64,358	67,834
Other assets - derivatives	1,299	126
Other liabilities - derivatives	$0	$0

Fair_Value_Part_2_Details

Fair Value Part 2 (Details) (Recurring Basis [Member], Level 3 [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
MSR [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$67,834		$47,341
Total net (losses) gains included in Mortgage banking, net	-15,769	[1]	2,012	[1]
Additions	12,293		18,481
Sales	0		0
Ending Balance	64,358		67,834
The amount of total (losses) gains for the period included in earnings that are attributable to the change in unrealized gains or losses still held, end of period	-7,202		11,818
Other Assets - Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	126		2,284
Total net (losses) gains included in Mortgage banking, net	4,554	[1]	7,754	[1]
Additions	0		0
Sales	-3,381		-9,912
Ending Balance	1,299		126
The amount of total (losses) gains for the period included in earnings that are attributable to the change in unrealized gains or losses still held, end of period	$587		$735

[1]	Total net (losses) gains included in Mortgage banking, net relating to MSR includes changes in fair value due to market changes and due to runoff.

Fair_Value_Part_3_Details

Fair Value Part 3 (Details) (USD $)	12 Months Ended
Fair Value Part 3 (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity	$1,170,685,000	$1,168,728,000
Net LHFI	6,379,853,000	5,732,433,000
FDIC indemnification asset	6,997,000	14,347,000	21,774,000	28,348,000
Deposits	9,698,358,000	9,859,902,000
Long-term FHLB advances	1,253,000	8,458,000
Subordinated notes	49,936,000	49,904,000
Junior subordinated debt securities	61,856,000	61,856,000
Nonfinancial Assets and Liabilities [Abstract]
Outstanding balances in impaired loans	47,100,000	31,600,000
Foreclosed assets measured at fair value	37,400,000	80,300,000
Allowance for possible loan losses, Charge-offs	13,900,000	11,400,000
Foreclosed assets re-measured after initial recognition	48,700,000	53,800,000
Write-downs of Allowance for Foreclosed Assets after Initial Recognition	7,700,000	6,400,000
Estimated fair value of financial instruments with immediate and shorter-term maturities maximum	90 days
Noninterest income in Mortgage banking, net for changes in fair value of LHFS	2,000,000
Fair value and the contractual principal outstanding of the LHFS [Abstract]
Fair value of LHFS	91,182,000
LHFS contractual principal outstanding	88,106,000
Fair value less unpaid principal	3,076,000
BancTrust Financial Group, Inc. [Member]
Nonfinancial Assets and Liabilities [Abstract]
Foreclosed assets measured at fair value		40,100,000
Level 2 [Member] \| Carrying Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and short-term investments	317,858,000	353,014,000
Securities held to maturity	1,170,685,000	1,168,728,000
Deposits	9,698,358,000	9,859,902,000
Short-term liabilities	868,620,000	317,972,000
Long-term FHLB advances	1,253,000	8,458,000
Subordinated notes	49,936,000	49,904,000
Junior subordinated debt securities	61,856,000	61,856,000
Level 2 [Member] \| Estimated Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and short-term investments	317,858,000	353,014,000
Securities held to maturity	1,182,846,000	1,150,833,000
Deposits	9,702,864,000	9,866,118,000
Short-term liabilities	868,620,000	317,972,000
Long-term FHLB advances	1,263,000	8,474,000
Subordinated notes	53,504,000	53,387,000
Junior subordinated debt securities	46,392,000	40,206,000
Level 3 [Member] \| Carrying Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net LHFI	6,379,853,000	5,732,433,000
Net acquired loans	537,350,000	794,570,000
FDIC indemnification asset	6,997,000	14,347,000
Level 3 [Member] \| Estimated Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net LHFI	6,453,618,000	5,787,408,000
Net acquired loans	537,350,000	794,570,000
FDIC indemnification asset	$6,997,000	$14,347,000

Derivative_Financial_Instrumen2

Derivative Financial Instruments Part 1 (Details) (USD $)	12 Months Ended
Derivative Financial Instruments Part 1 (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Designated as Hedging Instrument [Member] \| Forward Contracts [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet obligations		$155,800,000
Valuation adjustment		1,900,000
Designated as Hedging Instrument [Member] \| Interest Rate Swap [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount of mirror-image derivative contracts	60,000,000
Derivative inception date	31-Dec-14
Derivative maturity date	31-Dec-19
Description of variable rate basis for derivative	three-month LIBOR
Swap fixed interest rate to be paid (in hundredths)	1.66%
Period for which cash flow hedges will be used to hedge quarterly interest payments	5 years
Amount of ineffective derivative	0
Estimated amount to be reclassified as an increase to interest expense during the next twelve months	747,000
Accumulated net, after tax gain included in other comprehensive loss	136,000	1,500,000
Derivatives not Designated as Hedging Instruments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet obligations	142,000,000
Valuation adjustment	-1,000,000
Net positive ineffectiveness on MSR fair value	3,100,000	3,700,000
Derivatives not Designated as Hedging Instruments [Member] \| Beneficiary [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Number of risk participation agreements	3	3
Aggregate notional amount of credit risk participation agreements	19,100,000	19,700,000
Derivatives not Designated as Hedging Instruments [Member] \| Guarantor [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Number of risk participation agreements	1
Aggregate notional amount of credit risk participation agreements	6,200,000	0
Derivatives not Designated as Hedging Instruments [Member] \| Interest Rate Lock Commitments Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet obligations	88,400,000	58,500,000
Positive valuation adjustment	1,300,000	126,000
Derivatives not Designated as Hedging Instruments [Member] \| Interest Rate Swap [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount of mirror-image derivative contracts	349,400,000	355,900,000
Termination value of derivatives	1,900,000	508,000
Market value of posted collateral	$1,000,000

Derivative_Financial_Instrumen3

Derivative Financial Instruments Part 2 (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative asset	$3,025		$7,431
Fair value of derivative liability	2,813		4,628
Derivatives in Hedging Relationships [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized	-2		0		0
Derivatives in Hedging Relationships [Member] \| Mortgage Banking, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in mortgage banking, net	-2,534		2,649		1,479
Derivatives in Hedging Relationships [Member] \| Other Comprehensive Income (Loss) [Member]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net [Abstract]
Amount of (loss) gain recognized in other comprehensive income (loss)	-1,387		1,524		0
Derivatives in Hedging Relationships [Member] \| Interest Rate Swap [Member] \| Other Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative asset	221		2,469
Derivatives in Hedging Relationships [Member] \| Forward Contracts [Member] \| Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liability	0	[1]	-1,911	[1]
Derivatives not Designated as Hedging Instruments [Member] \| Mortgage Banking, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in mortgage banking, net	11,038		-10,459		7,585
Derivatives not Designated as Hedging Instruments [Member] \| Bank card and Other Fees [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (loss) gain recognized in bank card and other fees	-223		290		-82
Derivatives not Designated as Hedging Instruments [Member] \| Interest Rate Swap [Member] \| Other Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative asset	2,804		4,962
Derivatives not Designated as Hedging Instruments [Member] \| Interest Rate Swap [Member] \| Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liability	2,813		4,628
Derivatives not Designated as Hedging Instruments [Member] \| Forward Contracts [Member] \| Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liability	1,014	[1]	0	[1]
Derivatives not Designated as Hedging Instruments [Member] \| Future Contracts [Member] \| Other Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative asset	928		-2,662
Derivatives not Designated as Hedging Instruments [Member] \| Exchange Traded Purchased Options [Member] \| Other Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative asset	253		83
Derivatives not Designated as Hedging Instruments [Member] \| OTC Written Options (Rate Locks) [Member] \| Other Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative asset	1,299		126
Derivatives not Designated as Hedging Instruments [Member] \| Credit Risk Participation Agreement [Member] \| Other Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative asset	22		16
Derivatives not Designated as Hedging Instruments [Member] \| Credit Risk Participation Agreement [Member] \| Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liability	21		0
Derivatives not Designated as Hedging Instruments [Member] \| Exchange Traded Written Options [Member] \| Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liability	$490		$581

[1]	At December 31, 2014, forward contracts were no longer designated as hedging.

Derivative_Financial_Instrumen4

Derivative Financial Instruments, Offsetting Derivative Assets and Liabilities (Details) (Interest Rate Swap [Member], USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Interest Rate Swap [Member]
Offsetting Derivative Assets [Abstract]
Gross Amounts of Recognized Assets, Offsetting of Derivative Assets	$3,025	$7,431
Gross Amounts Offset in the Statement of Financial Position, Offsetting of Derivative Assets	0	0
Net Amounts of Assets presented in the Statement of Financial Position, Offsetting of Derivative Assets	3,025	7,431
Financial Instruments, Gross Amounts Not Offset in the Statement of Financial Position, Offsetting of Derivative Assets	-347	-967
Cash Collateral Received, Gross Amounts Not Offset in the Statement of Financial Position, Offsetting of Derivative Assets	0	-1,920
Net Amount, Offsetting of Derivative Assets	2,678	4,544
Offsetting Derivative Liabilities [Abstract]
Gross Amounts of Recognized Liabilities, Offsetting of Derivative Liabilities	2,813	4,628
Gross Amounts Offset in the Statement of Financial Position, Offsetting of Derivative Liabilities	0	0
Net Amounts of Liabilities presented in the Statement of Financial Position, Offsetting of Derivative Liabilities	2,813	4,628
Financial Instruments, Gross Amounts Not Offset in the Statement of Financial Position, Offsetting of Derivative Liabilities	-347	-967
Cash Collateral Posted, Gross Amounts Not Offset in the Statement of Financial Position, Offsetting of Derivative Liabilities	0	0
Net Amount, Offsetting of Derivative Liabilities	$2,466	$3,661

Segment_Information_Details

Segment Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	Segment	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Number of segments in which the business operates	3
Net interest income	$405,336,000	$388,487,000	$340,990,000
Provision for loan losses, net	7,382,000	-7,382,000	12,294,000
Noninterest income	173,142,000	173,859,000	175,189,000
Noninterest expense	409,005,000	415,731,000	344,502,000
Income before income taxes	162,091,000	153,997,000	159,383,000
Income taxes	38,529,000	36,937,000	42,100,000
Net Income	123,562,000	117,060,000	117,283,000
Selected Financial Information [Abstract]
Average assets	12,028,030,000	11,530,969,000	9,803,051,000
Depreciation and amortization	36,072,000	37,153,000	29,275,000
General Banking [Member] \| Reportable Segments [Member]
Segment Reporting Information [Line Items]
Net interest income	404,214,000	387,586,000	340,130,000
Provision for loan losses, net	7,382,000	-7,382,000	12,294,000
Noninterest income	107,457,000	113,571,000	122,565,000
Noninterest expense	355,693,000	367,031,000	302,234,000
Income before income taxes	148,596,000	141,508,000	148,167,000
Income taxes	33,726,000	32,499,000	38,079,000
Net Income	114,870,000	109,009,000	110,088,000
Selected Financial Information [Abstract]
Average assets	11,958,078,000	11,463,789,000	9,737,230,000
Depreciation and amortization	35,038,000	35,971,000	27,886,000
Wealth Management [Member] \| Reportable Segments [Member]
Segment Reporting Information [Line Items]
Net interest income	851,000	582,000	559,000
Noninterest income	32,209,000	29,446,000	24,421,000
Noninterest expense	26,733,000	24,713,000	20,916,000
Income before income taxes	6,327,000	5,315,000	4,064,000
Income taxes	2,105,000	1,754,000	1,354,000
Net Income	4,222,000	3,561,000	2,710,000
Selected Financial Information [Abstract]
Average assets	1,504,000	304,000	261,000
Depreciation and amortization	190,000	157,000	164,000
Insurance [Member] \| Reportable Segments [Member]
Segment Reporting Information [Line Items]
Net interest income	271,000	319,000	301,000
Noninterest income	33,476,000	30,842,000	28,203,000
Noninterest expense	26,579,000	23,987,000	21,352,000
Income before income taxes	7,168,000	7,174,000	7,152,000
Income taxes	2,698,000	2,684,000	2,667,000
Net Income	4,470,000	4,490,000	4,485,000
Selected Financial Information [Abstract]
Average assets	68,448,000	66,876,000	65,560,000
Depreciation and amortization	$844,000	$1,025,000	$1,225,000

Parent_Company_Only_Financial_2

Parent Company Only Financial Information (Details) (USD $)	12 Months Ended
Parent Company Only Financial Information (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Assets [Abstract]
Other assets	$568,685,000	$582,363,000
Total Assets	12,250,633,000	11,790,383,000
Liabilities and Shareholders' Equity [Abstract]
Junior subordinated debt securities	61,856,000	61,856,000
Shareholders' equity	1,419,940,000	1,354,953,000	1,287,369,000	1,215,037,000
Total Liabilities and Shareholders' Equity	12,250,633,000	11,790,383,000
Expense [Abstract]
Net Income	123,562,000	117,060,000	117,283,000
Operating Activities [Abstract]
Net income	123,562,000	117,060,000	117,283,000
Adjustments to reconcile net income to net cash provided by operating activities [Abstract]
Other	16,337,000	7,523,000	22,497,000
Net cash provided by operating activities	211,267,000	301,183,000	112,277,000
Investing Activities: [Abstract]
Net cash (used in) provided by investing activities	-556,255,000	-258,967,000	173,739,000
Financing Activities [Abstract]
Cash dividends paid on common stock	-62,474,000	-62,276,000	-59,961,000
Net cash provided by (used in) financing activities	315,200,000	72,056,000	-257,152,000
(Decrease) Increase in cash and cash equivalents	-29,788,000	114,272,000	28,864,000
Cash and cash equivalents at beginning of year	345,761,000	231,489,000	202,625,000
Cash and cash equivalents at end of year	315,973,000	345,761,000	231,489,000
Income taxes paid	13,710,000	14,520,000	57,834,000
Interest paid	22,268,000	25,715,000	31,496,000
Trustmark Corp (Parent Company Only) [Member]
Assets [Abstract]
Investment in banks	1,463,676,000	1,394,250,000
Other assets	18,663,000	25,314,000
Total Assets	1,482,339,000	1,419,564,000
Liabilities and Shareholders' Equity [Abstract]
Accrued expense	543,000	2,755,000
Junior subordinated debt securities	61,856,000	61,856,000
Shareholders' equity	1,419,940,000	1,354,953,000
Total Liabilities and Shareholders' Equity	1,482,339,000	1,419,564,000
Revenue [Abstract]
Dividends received from banks	64,351,000	64,155,000	72,216,000
Earnings of subsidiaries over distributions	60,783,000	54,195,000	46,220,000
Other income	55,000	64,000	59,000
Total Revenue	125,189,000	118,414,000	118,495,000
Expense [Abstract]
Other expense	1,627,000	1,354,000	1,212,000
Total Expense	1,627,000	1,354,000	1,212,000
Net Income	123,562,000	117,060,000	117,283,000
Operating Activities [Abstract]
Net income	123,562,000	117,060,000	117,283,000
Adjustments to reconcile net income to net cash provided by operating activities [Abstract]
Increase in investment in subsidiaries	-60,783,000	-54,195,000	-46,220,000
Other	-2,158,000	962,000	-376,000
Net cash provided by operating activities	60,621,000	63,827,000	70,687,000
Investing Activities: [Abstract]
Payment for investments in subsidiaries	0	-73,263,000	-10,003,000
Repayment for investments in subsidiaries	0	106,000,000	0
Net cash (used in) provided by investing activities	0	32,737,000	-10,003,000
Financing Activities [Abstract]
Repayments of advances from subsidiaries	0	-33,000,000	0
Cash dividends paid on common stock	-62,474,000	-62,276,000	-59,961,000
Other common stock transactions, net	-1,502,000	2,832,000	-1,237,000
Net cash provided by (used in) financing activities	-63,976,000	-92,444,000	-61,198,000
(Decrease) Increase in cash and cash equivalents	-3,355,000	4,120,000	-514,000
Cash and cash equivalents at beginning of year	21,776,000	17,656,000	18,170,000
Cash and cash equivalents at end of year	18,421,000	21,776,000	17,656,000
Income taxes paid	13,700,000	14,500,000	57,800,000
Interest paid	$0	$0	$0