Simmons First National (SFNC) 10-K 28 Feb 18 2017 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2017	Feb. 12, 2018	Jun. 30, 2017
Document Information [Line Items]
Entity Registrant Name	SIMMONS FIRST NATIONAL CORP
Entity Central Index Key	90,498
Trading Symbol	sfnc
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	Yes
Entity Common Stock, Shares Outstanding (in shares)		92,203,928
Entity Public Float			$ 1,603,088,900
Document Type	10-K
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
ASSETS
Cash and non-interest bearing balances due from banks	$ 205,025	$ 117,007
Interest bearing balances due from banks and federal funds sold	393,017	168,652
Cash and cash equivalents	598,042	285,659
Interest bearing balances due from banks – time	3,314	4,563
Investment securities:
Held-to-maturity	368,058	462,096
Available-for-sale	1,589,517	1,157,354
Total investments	1,957,575	1,619,450
Mortgage loans held for sale	24,038	27,788
Assets held in trading accounts		41
Other assets held for sale	165,780
Loans:
Legacy loans	5,705,609	4,327,207
Allowance for loan losses	(41,668)	(36,286)
Loans acquired, net of discount and allowance	5,074,076	1,305,683
Net loans	10,738,017	5,596,604
Premises and equipment	287,249	199,359
Premises held for sale		6,052
Foreclosed assets and other real estate owned	32,118	26,895
Interest receivable	43,528	27,788
Bank owned life insurance	185,984	138,620
Goodwill	842,651	348,505
Other intangible assets	106,071	52,959
Other assets	71,439	65,773
Total assets	15,055,806	8,400,056
Deposits:
Non-interest bearing transaction accounts	2,665,249	1,491,676
Interest bearing transaction accounts and savings deposits	6,494,896	3,956,483
Time deposits	1,932,730	1,287,060
Total deposits	11,092,875	6,735,219
Federal funds purchased and securities sold under agreements to repurchase	122,444	115,029
Other borrowings	1,380,024	273,159
Subordinated debentures	140,565	60,397
Other liabilities held for sale	157,366
Accrued interest and other liabilities	77,968	65,141
Total liabilities	12,971,242	7,248,945
Stockholders’ equity:
Common stock, Class A, $0.01 par value; 120,000,000 shares authorized; 92,029,118 and 62,555,446 shares issued and outstanding at December 31, 2017 and 2016, respectively	920	626
Surplus	1,586,034	711,663
Undivided profits	514,874	454,034
Accumulated other comprehensive loss	(17,264)	(15,212)
Total stockholders’ equity	2,084,564	1,151,111
Total liabilities and stockholders’ equity	$ 15,055,806	$ 8,400,056

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - $ / shares	Dec. 31, 2017	Dec. 31, 2016
Common stock, Class A, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, Class A, shares authorized (in shares)	120,000,000	120,000,000
Common stock, Class A, shares issued (in shares)	92,029,118	62,555,446
Common stock, Class A, shares outstanding (in shares)	92,029,118	62,555,446

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($)		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
INTEREST INCOME
Loans		$ 352,351,000	$ 265,652,000	$ 268,367,000
Interest bearing balances due from banks and federal funds sold		1,933,000	756,000	899,000
Investment securities		40,115,000	33,479,000	30,613,000
Mortgage loans held for sale		605,000	1,102,000	1,051,000
Assets held in trading accounts			16,000	18,000
TOTAL INTEREST INCOME		395,004,000	301,005,000	300,948,000
INTEREST EXPENSE
Deposits		27,756,000	15,217,000	15,248,000
Federal funds purchased and securities sold under agreements to repurchase		347,000	273,000	236,000
Other borrowings		8,621,000	4,148,000	5,097,000
Subordinated debentures		3,350,000	2,161,000	1,772,000
TOTAL INTEREST EXPENSE		40,074,000	21,799,000	22,353,000
NET INTEREST INCOME		354,930,000	279,206,000	278,595,000
Provision for loan losses		26,393,000	20,065,000	9,022,000
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES		328,537,000	259,141,000	269,573,000
NON-INTEREST INCOME
Trust income		18,570,000	15,442,000	9,261,000
Service charges on deposit accounts		36,079,000	32,414,000	30,985,000
Other service charges and fees		9,919,000	12,872,000	8,756,000
Mortgage and SBA lending income		13,316,000	16,483,000	11,452,000
Investment banking income		2,793,000	3,471,000	2,590,000
Debit and credit card fees		34,258,000	30,740,000	26,660,000
Bank owned life insurance income		3,503,000	3,324,000	2,680,000
Gain on sale of securities, net		1,059,000	5,848,000	307,000
Net loss on assets covered by FDIC loss share agreements				(14,812,000)
Other income		19,268,000	18,788,000	16,782,000
TOTAL NON-INTEREST INCOME		138,765,000	139,382,000	94,661,000
NON-INTEREST EXPENSE
Salaries and employee benefits		154,314,000	133,457,000	138,243,000
Occupancy expense, net		21,159,000	18,667,000	16,858,000
Furniture and equipment expense		19,366,000	16,683,000	14,352,000
Other real estate and foreclosure expense		3,042,000	4,461,000	4,861,000
Deposit insurance		3,696,000	3,469,000	4,201,000
Merger related costs		21,923,000	4,835,000	13,760,000
Other operating expenses		88,879,000	73,513,000	64,695,000
TOTAL NON-INTEREST EXPENSE		312,379,000	255,085,000	256,970,000
INCOME BEFORE INCOME TAXES		154,923,000	143,438,000	107,264,000
Provision for income taxes		61,983,000	46,624,000	32,900,000
NET INCOME		92,940,000	96,814,000	74,364,000
Preferred stock dividends			24,000	257,000
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS		$ 92,940,000	$ 96,790,000	$ 74,107,000
BASIC EARNINGS PER SHARE (in dollars per share)	[1]	$ 1.34	$ 1.58	$ 1.32
DILUTED EARNINGS PER SHARE (in dollars per share)	[1]	$ 1.33	$ 1.56	$ 1.31
[1]	All per share amounts have been restated to reflect the effect of the two-for-one stock split on February 8, 2018.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
NET INCOME	$ 92,940	$ 96,814	$ 74,364
OTHER COMPREHENSIVE INCOME (LOSS)
Unrealized holding gains (losses) arising during the period on available-for-sale loans and securities	2,645	(14,797)	(1,880)
Less: Reclassification adjustment for realized gains included in net income	1,059	5,848	307
Other comprehensive income (loss), before tax effect	1,586	(20,645)	(2,187)
Less: Tax effect of other comprehensive income (loss)	622	(8,098)	(858)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	964	(12,547)	(1,329)
COMPREHENSIVE INCOME	$ 93,904	$ 84,267	$ 73,035

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
OPERATING ACTIVITIES
Net income	$ 92,940,000	$ 96,814,000	$ 74,364,000
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	21,062,000	16,978,000	13,654,000
Provision for loan losses	26,393,000	20,065,000	9,022,000
Gain on sale of investments	(1,059,000)	(5,848,000)	(307,000)
Net accretion of investment securities and assets not covered by FDIC loss share	(38,090,000)	(31,928,000)	(32,933,000)
Net amortization on borrowings	561,000	421,000	375,000
Stock-based compensation expense	10,681,000	3,418,000	4,018,000
Net accretion on assets covered by FDIC loss share			(2,709,000)
(Gain) loss on sale of premises and equipment, net of impairment	(615,000)	(225,000)	381,000
Gain on sale of foreclosed assets and other real estate owned	(1,076,000)	(2,432,000)	(4,339,000)
Gain on sale of mortgage loans held for sale	(12,186,000)	(14,683,000)	(11,625,000)
Fair value write-down of closed branches	325,000	3,000,000	1,958,000
Deferred income taxes	23,251,000	9,832,000	13,599,000
FDIC loss share indemnification loss			7,476,000
Gain on sale of banking operation			(2,110,000)
Gain on sale of insurance lines of business	(3,708,000)
Increase in cash surrender value of bank owned life insurance income	(3,503,000)	(3,324,000)	(2,680,000)
Originations of mortgage loans held for sale	(507,907,000)	(618,453,000)	(571,750,000)
Proceeds from sale of mortgage loans held for sale	526,245,000	635,613,000	574,375,000
Changes in assets and liabilities:
Interest receivable	(2,432,000)	(1,197,000)	713,000
Assets held in trading accounts	41,000	4,381,000	2,565,000
Other assets	12,456,000	(8,254,000)	5,453,000
Accrued interest and other liabilities	(14,194,000)	(14,959,000)	1,393,000
Income taxes payable	(14,604,000)	1,915,000	3,466,000
Net cash provided by operating activities	114,581,000	91,134,000	84,359,000
INVESTING ACTIVITIES
Net originations of loans not covered by FDIC loss share	(698,532,000)	(368,162,000)	(301,323,000)
Net collections of loans covered by FDIC loss share			23,646,000
Decrease in due from banks - time	3,233,000	9,544,000	10,879,000
Purchases of premises and equipment, net	(34,216,000)	(18,892,000)	(14,832,000)
Proceeds from sale of premises and equipment	3,475,000	1,628,000	5,738,000
Purchases of other real estate owned	(1,021,000)
Proceeds from sale of foreclosed assets and other real estate owned	18,255,000	29,055,000	40,988,000
Proceeds from sale of foreclosed assets held for sale, covered by FDIC loss share			2,858,000
Proceeds from sale of available-for-sale securities	679,613,000	346,273,000	32,007,000
Proceeds from maturities of available-for-sale securities	487,717,000	257,388,000	435,438,000
Purchases of available-for-sale securities	(854,708,000)	(861,572,000)	(445,281,000)
Proceeds from maturities of held-to-maturity securities	97,494,000	250,636,000	281,120,000
Purchases of held-to-maturity securities	(860,000)	(6,162,000)	(59,486,000)
Proceeds from bank owned life insurance death benefits		3,039,000
Purchases of bank owned life insurance	(143,000)	(143,000)	(12,143,000)
Settlement of FDIC loss share agreements			2,368,000
Cash received on FDIC loss share			3,980,000
Cash paid on sale of banking operations, net of cash received			(68,273,000)
Proceeds from the sale of insurance lines of business	9,296,000
Cash paid in business combinations, net of cash received	(48,092,000)
Cash received in business combinations, net of cash paid		106,419,000	197,029,000
Net cash (used in) provided by investing activities	(338,489,000)	(250,949,000)	134,713,000
FINANCING ACTIVITIES
Net change in deposits	120,667,000	139,266,000	(107,633,000)
Repayments of subordinated debentures and subordinated debt	(3,000,000)	(594,000)
Dividends paid on preferred stock		(24,000)	(257,000)
Dividends paid on common stock	(35,116,000)	(28,743,000)	(27,026,000)
Net change in other borrowed funds	521,865,000	106,823,000	(143,914,000)
Net change in federal funds purchased and securities sold under agreements to repurchase	(71,003,000)	2,398,000	(27,418,000)
Net shares issued under stock compensation plans	2,260,000	4,352,000	3,303,000
Shares issued under employee stock purchase plan	618,000	586,000	226,000
Redemption of preferred stock		(30,852,000)
Net cash provided by (used in) financing activities	536,291,000	193,212,000	(302,719,000)
INCREASE (DECREASE) IN CASH EQUIVALENTS	312,383,000	33,397,000	(83,647,000)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	285,659,000	252,262,000	335,909,000
CASH AND CASH EQUIVALENTS, END OF YEAR	$ 598,042,000	$ 285,659,000	$ 252,262,000

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Community First Bancshares Inc [Member]Preferred Stock [Member]	Community First Bancshares Inc [Member]Common Stock [Member]	Community First Bancshares Inc [Member]Additional Paid-in Capital [Member]	Community First Bancshares Inc [Member]	Liberty Bancshares, Inc. [Member]Common Stock [Member]	Liberty Bancshares, Inc. [Member]Additional Paid-in Capital [Member]	Liberty Bancshares, Inc. [Member]	Ozark Trust [Member]Common Stock [Member]	Ozark Trust [Member]Additional Paid-in Capital [Member]	Ozark Trust [Member]	Citizens National Bank [Member]Common Stock [Member]	Citizens National Bank [Member]Additional Paid-in Capital [Member]	Citizens National Bank [Member]	Hardeman County Investment Company, Inc. [Member]Common Stock [Member]	Hardeman County Investment Company, Inc. [Member]Additional Paid-in Capital [Member]	Hardeman County Investment Company, Inc. [Member]	OKSB Merger [Member]Common Stock [Member]	OKSB Merger [Member]Additional Paid-in Capital [Member]	OKSB Merger [Member]	First Texas Merger [Member]Common Stock [Member]	First Texas Merger [Member]Additional Paid-in Capital [Member]	First Texas Merger [Member]	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2014																								$ 361	$ 156,388	$ (1,336)	$ 338,906	$ 494,319
Comprehensive income																										(1,329)	74,364	73,035
Stock issued for employee stock purchase plan																									226			226
Stock-based compensation plans, net																								3	7,318			7,321
Stock issued for acquisition	$ 30,852	$ 131	$ 268,211	$ 299,194	$ 104	$ 212,072	$ 212,176	$ 7	$ 17,860	$ 17,867
Dividends on preferred stock																											(257)	(257)
Cash dividends																											(27,026)	(27,026)
Balance at Dec. 31, 2015																							$ 30,852	606	662,075	(2,665)	385,987	1,076,855
Comprehensive income																										(12,547)	96,814	84,267
Stock issued for employee stock purchase plan																									586			586
Stock-based compensation plans, net																								3	7,767			7,770
Stock issued for acquisition											$ 17	$ 41,235	$ 41,252
Dividends on preferred stock																											(24)	(24)
Preferred stock redeemed																							$ (30,852)					(30,852)
Dividends on common stock																											(28,743)	(28,743)
Balance at Dec. 31, 2016																								626	711,663	(15,212)	454,034	1,151,111
Comprehensive income																										964	92,940	93,904
Stock issued for employee stock purchase plan																									618			618
Stock-based compensation plans, net																								3	12,938			12,941
Stock issued for acquisition														$ 16	$ 42,622	$ 42,638	$ 145	$ 431,253	$ 431,398	$ 130	$ 386,940	$ 387,070
Dividends on common stock																											(35,116)	(35,116)
Reclassify stranded tax effects due to 2017 tax law changes																										(3,016)	3,016
Balance at Dec. 31, 2017																								$ 920	$ 1,586,034	$ (17,264)	$ 514,874	$ 2,084,564

Consolidated Statements of Sto8

Consolidated Statements of Stockholders' Equity (Parentheticals) - $ / shares		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Additional Paid-in Capital [Member]
Stock issued for employee stock purchase plan, shares (in shares)	[1]	26,002	31,470	13,056
Common Stock [Member] | Community First Bancshares Inc [Member]
Stock issued for acquisition, shares (in shares)	[1]			13,105,832
Common Stock [Member] | Liberty Bancshares, Inc. [Member]
Stock issued for acquisition, shares (in shares)	[1]			10,362,674
Common Stock [Member] | Ozark Trust [Member]
Stock issued for acquisition, shares (in shares)	[1]			678,580
Common Stock [Member] | Citizens National Bank [Member]
Stock issued for acquisition, shares (in shares)	[1]		1,671,482
Common Stock [Member] | Hardeman County Investment Company, Inc. [Member]
Stock issued for acquisition, shares (in shares)	[1]	1,599,940
Common Stock [Member] | OKSB Merger [Member]
Stock issued for acquisition, shares (in shares)	[1]	14,488,604
Common Stock [Member] | First Texas Merger [Member]
Stock issued for acquisition, shares (in shares)	[1]	12,999,840
Common Stock [Member]
Stock issued for compensation plans, shares (in shares)	[1]	359,286	295,630	291,746
Preferred Stock [Member] | Community First Bancshares Inc [Member]
Stock issued for acquisition, shares (in shares)	[1]			30,852
Retained Earnings [Member]
Cash dividends, per share (in dollars per share)	[1]	$ 0.50	$ 0.48	$ 0.46
Stock issued for acquisition, shares (in shares)				132,000
[1]	All share and per share amounts have been restated to reflect the effect of the two-for-one stock split on February 8, 2018.

Note 1 - Summary of Significant

Note 1 - Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Significant Accounting Policies [Text Block]	NOTE 1: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of Operations and Principles of Consolidation Simmons First National Corporation (the “Company”) is primarily engaged in providing a full range of banking services to individual and corporate customers through its subsidiaries and their branch banks with offices. We are headquartered in Pine Bluff, Arkansas and conduct banking operations in communities throughout Arkansas, Colorado, Kansas, Missouri, Oklahoma, Tennessee and Texas. We offer consumer, real estate and commercial loans, checking, savings and time deposits from our 200 The consolidated financial statements include the accounts of Simmons First National Corporation and its subsidiaries, including Simmons Bank, Bank SNB and Southwest Bank. Significant intercompany accounts and transactions have been eliminated in consolidation. Operating Segments Operating segments are components of an enterprise about which separate financial information is available that is regularly evaluated by the chief operating decision maker in deciding how to allocate resources and in assessing performance. The Company is organized on a divisional basis. Each of the divisions provide a group of similar community banking services, including such products and services as loans; time deposits, checking and savings accounts; personal and corporate trust services; credit cards; investment management; insurance; and securities and investment services. Loan products include consumer, real estate, commercial, agricultural, equipment and SBA lending. The individual bank divisions have similar operating and economic characteristics. While the chief operating decision maker monitors the revenue streams of the various products, services, branch locations and divisions, operations are managed, financial performance is evaluated, and management makes decisions on how to allocate resources on a Company-wide basis. Accordingly, the divisions are considered by management to be aggregated into one The Company also considers its trust, investment and insurance services to be operating segments. Information on these segments is not not 280 10 50 12. Use of Estimates The preparation of financial statements, in accordance with accounting principles generally accepted in the United States (“US GAAP”), requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, income and expenses and disclosure of contingent assets and liabilities. The estimates and assumptions used in the accompanying consolidated financial statements are based upon management’s evaluation of the relevant facts and circumstances as of the date of the consolidated financial statements and actual results may Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan losses, the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans and the valuation of acquired loans and related indemnification asset. Management obtains independent appraisals for significant properties in connection with the determination of the allowance for loan losses and the valuation of foreclosed assets. Reclassifications Certain gains and fees were reclassified within non-interest income categories in the 2016 2017 not Cash Equivalents The Company considers all liquid investments with original maturities of three Investment Securities Held-to-maturity securities, which include any security for which the Company has the positive intent and ability to hold until maturity, are carried at historical cost adjusted for amortization of premiums and accretion of discounts. Premiums and discounts are amortized and accreted, respectively, to interest income using the constant yield method over the period to maturity. Available-for-sale securities, which include any security for which the Company has no may Trading securities, which include any security held primarily for near-term sale, are carried at fair value. Gains and losses on trading securities are included in other income. The Company applies accounting guidance related to recognition and presentation of other-than-temporary impairment under ASC Topic 320 10. not not, not As a result of this guidance, the Company’s consolidated statements of income reflect the full impairment (that is, the difference between the security’s amortized cost basis and fair value) on debt securities that the Company intends to sell or would more likely than not no not not not Mortgage Loans Held For Sale Mortgage loans held for sale are carried at the lower of cost or fair value, determined using an aggregate basis. Write-downs to fair value are recognized as a charge to earnings at the time the decline in value occurs. Forward commitments to sell mortgage loans are acquired to reduce market risk on mortgage loans in the process of origination and mortgage loans held for sale. The forward commitments acquired by the Company for mortgage loans in process of origination are not not not December 31, 2017 2016 not not Loans Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-offs are reported at their outstanding principal adjusted for any loans charged off, the allowance for loan losses and any unamortized deferred fees or costs on originated loans and unamortized premiums or discounts on purchased loans. For loans amortized at cost, interest income is accrued based on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, as well as premiums and discounts, are deferred and amortized as a level yield adjustment over the respective term of the loan. The accrual of interest on loans, except on certain government guaranteed loans, is discontinued at the time the loan is 90 Discounts and premiums on purchased residential real estate loans are amortized to income using the interest method over the remaining period to contractual maturity, adjusted for anticipated prepayments. Discounts and premiums on purchased consumer loans are recognized over the expected lives of the loans using methods that approximate the interest method. For discussion of the Company’s accounting for acquired loans, see Acquisition Accounting, Covered Loans and Related Indemnification Asset later in this section. Allowance for Loan Losses The allowance for loan losses is management’s estimate of probable losses in the loan portfolio. Loan losses are charged against the allowance when management believes the uncollectability of a loan balance is confirmed. Subsequent recoveries, if any, are credited to the allowance. Allocations to the allowance for loan losses are categorized as either general reserves or specific reserves. The allowance for loan losses is calculated monthly based on management’s assessment of several factors such as ( 1 2 3 4 5 6 7 8 one four Specific reserves are provided on loans that are considered impaired when it is probable that we will not 90 not 90 Management’s evaluation of the allowance for loan losses is inherently subjective as it requires material estimates. The actual amounts of loan losses realized in the near term could differ from the amounts estimated in arriving at the allowance for loan losses reported in the financial statements. Reserve for Unfunded Commitments In addition to the allowance for loan losses, the Company has established a reserve for unfunded commitments, classified in other liabilities. This reserve is maintained at a level sufficient to absorb losses arising from unfunded loan commitments. The adequacy of the reserve for unfunded commitments is determined monthly based on methodology similar to the Company’s methodology for determining the allowance for loan losses. Net adjustments to the reserve for unfunded commitments are included in other non-interest expense. Acquisition Accounting, Acquired Loans The Company accounts for its acquisitions under ASC Topic 805, Business Combinations No 820. The Company evaluates non-impaired loans acquired in accordance with the provisions of ASC Topic 310 20, Nonrefundable Fees and Other Costs 310 30, Loans and Debt Securities Acquired with Deteriorated Credit Quality not For impaired loans accounted for under ASC Topic 310 30, Covered Loans and Related Indemnification Asset In September 2015, 2010 2012 four Under the terms of the agreement, the FDIC made a net payment of $2,368,000 one $7,476,000. For further discussion of our acquisition and loan accounting, see Note 2, 6, Trust Assets Trust assets (other than cash deposits) held by the Company in fiduciary or agency capacities for its customers are not not Premises and Equipment Depreciable assets are stated at cost less accumulated depreciation. Depreciation is charged to expense using the straight-line method over the estimated useful lives of the assets. Leasehold improvements are capitalized and amortized by the straight-line method over the terms of the respective leases or the estimated useful lives of the improvements, whichever is shorter. Premises Held for Sale The Company records premises held for sale at the lower of ( 1 2 Foreclosed Assets Held For Sale Assets acquired by foreclosure or in settlement of debt and held for sale are valued at estimated fair value as of the date of foreclosure, and a related valuation allowance is provided for estimated costs to sell the assets. Management evaluates the value of foreclosed assets held for sale periodically and increases the valuation allowance for any subsequent declines in fair value. Changes in the valuation allowance are charged or credited to other expense. Bank Owned Life Insurance The Company maintains bank-owned life insurance policies on certain current and former employees and directors, which are recorded at their cash surrender values as determined by the insurance carriers. The appreciation in the cash surrender value of the policies is recognized as a component of non-interest income in the Company’s consolidated statements of income. Goodwill and Intangible Assets Goodwill represents the excess of the cost of an acquisition over the fair value of the net assets acquired. Other intangible assets represent purchased assets that also lack physical substance but can be separately distinguished from goodwill because of contractual or other legal rights or because the asset is capable of being sold or exchanged either on its own or in combination with a related contract, asset or liability. The Company performs an annual goodwill impairment test, and more frequently if circumstances warrant, in accordance with ASC Topic 350, Intangibles – Goodwill and Other 350 may not Derivative Financial Instruments The Company may For derivatives designated as hedging the exposure to changes in the fair value of the hedged item, the gain or loss is recognized in earnings in the period of change together with the offsetting loss or gain of the hedging instrument. The fair value hedges are considered to be highly effective and any hedge ineffectiveness was deemed not The notional amount of the swaps was $303.5 December 31, 2017, $99.2 December 31, 2016. Securities Sold Under Agreements to Repurchase The Company sells securities under agreements to repurchase to meet customer needs for sweep accounts. At the point funds deposited by customers become investable, those funds are used to purchase securities owned by the Company and held in its general account with the designation of Customers’ Securities. A third not Bankcard Fee Income Periodic bankcard fees, net of direct origination costs, are recognized as revenue on a straight-line basis over the period the fee entitles the cardholder to use the card. Income Taxes The Company accounts for income taxes in accordance with income tax accounting guidance in ASC Topic 740, Income Taxes two Deferred income tax expense results from changes in deferred tax assets and liabilities between periods. Deferred tax assets are recognized if it is more likely than not, not 50 not 50 not not not not The Company files consolidated income tax returns with its subsidiaries. Earnings Per Share Basic earnings per share are computed based on the weighted average number of shares outstanding during each year. Diluted earnings per share are computed using the weighted average common shares and all potential dilutive common shares outstanding during the period. All share and per share amounts have been restated to reflect the effect of the two one February 2018. The computation of per share earnings is as follows: (In thousands, except per share data) 2017 2016 2015 Net income available to common shareholders $ 92,940 $ 96,790 $ 74,107 Average common shares outstanding 69,385 61,291 56,168 Average potential dilutive common shares 468 636 252 Average diluted common shares 69,853 61,927 56,420 Basic earnings per share $ 1.34 $ 1.58 $ 1.32 Diluted earnings per share $ 1.33 $ 1.56 $ 1.31 There were no December 31, 2017, 2016 2015. Stock-Based Compensation The Company has adopted various stock-based compensation plans. The plans provide for the grant of incentive stock options, nonqualified stock options, stock appreciation rights and bonus stock awards. Pursuant to the plans, shares are reserved for future issuance by the Company, upon exercise of stock options or awarding of bonus shares granted to directors, officers and other key employees. In accordance with ASC Topic 718, Compensation – Stock Compensation 14,

Note 2 - Acquisitions

Note 2 - Acquisitions	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Mergers, Acquisitions and Dispositions Disclosures [Text Block]	NOTE 2: ACQUISITIONS Southwest Bancorp, Inc. On October 19, 2017, 14,488,604 $431.4 October 19, 2017, $95.0 Prior to the acquisition, OKSB conducted banking business from 29 $2.7 $2.0 $2.0 May 2018, Goodwill of $228.9 not A summary, at fair value, of the assets acquired and liabilities assumed in the OKSB transaction, as of the acquisition date, is as follows: (In thousands) Acquired from Fair Value Fair Assets Acquired Cash and due from banks $ 79,517 $ -- $ 79,517 Investment securities 485,468 (1,295 ) 484,173 Loans acquired 2,039,524 (43,071 ) 1,996,453 Allowance for loan losses (26,957 ) 26,957 -- Foreclosed assets 6,284 (1,127 ) 5,157 Premises and equipment 21,210 5,457 26,667 Bank owned life insurance 28,704 -- 28,704 Goodwill 13,545 (13,545 ) -- Core deposit intangible 1,933 40,191 42,124 Other intangibles 3,806 -- 3,806 Other assets 33,455 (8,929 ) 24,526 Total assets acquired $ 2,686,489 $ 4,638 $ 2,691,127 Liabilities Assumed Deposits: Non-interest bearing transaction accounts $ 485,971 $ -- $ 485,971 Interest bearing transaction accounts and savings deposits 869,252 -- 869,252 Time deposits 613,345 (2,213 ) 611,132 Total deposits 1,968,568 (2,213 ) 1,966,355 Securities sold under agreement to repurchase 11,256 -- 11,256 Other borrowings 347,000 -- 347,000 Subordinated debentures 46,393 -- 46,393 Accrued interest and other liabilities 17,440 5,364 22,804 Total liabilities assumed 2,390,657 3,151 2,393,808 Equity 295,832 (295,832 ) -- Total equity assumed 295,832 (295,832 ) -- Total liabilities and equity assumed $ 2,686,489 $ (292,681 ) $ 2,393,808 Net assets acquired 297,319 Purchase price 526,251 Goodwill $ 228,932 The purchase price allocation and certain fair value measurements remain preliminary due to the timing of the acquisition. Management will continue to review the estimated fair values and evaluate the assumed tax positions. The Company expects to finalize its analysis of the acquired assets and assumed liabilities in this transaction over the next few months, within one may The Company’s operating results for 2017 First Texas BHC, Inc. On October 19, 2017, 12,999,840 $387.1 October 19, 2017, $70.0 Prior to the acquisition, First Texas operated 15 $2.4 $2.2 $1.9 February 2018. Goodwill of $238.0 not A summary, at fair value, of the assets acquired and liabilities assumed in the First Texas transaction, as of the acquisition date, is as follows: (In thousands) Acquired from Fair Value Fair Assets Acquired Cash and due from banks $ 59,277 $ -- $ 59,277 Investment securities 81,114 (596 ) 80,518 Loans acquired 2,246,212 (37,834 ) 2,208,378 Allowance for loan losses (20,864 ) 20,664 (200 ) Premises and equipment 24,864 10,123 34,987 Bank owned life insurance 7,190 -- 7,190 Goodwill 37,227 (37,227 ) -- Core deposit intangible -- 7,328 7,328 Other assets 18,263 12,703 30,966 Total assets acquired $ 2,453,283 $ (24,839 ) $ 2,428,444 Liabilities Assumed Deposits: Non-interest bearing transaction accounts $ 74,410 $ -- $ 74,410 Interest bearing transaction accounts and savings deposits 1,683,298 -- 1,683,298 Time deposits 124,233 (283 ) 123,950 Total deposits 1,881,941 (283 ) 1,881,658 Securities sold under agreement to repurchase 50,000 -- 50,000 Other borrowings 235,000 -- 235,000 Subordinated debentures 30,323 (811 ) 29,512 Accrued interest and other liabilities 11,727 1,463 13,190 Total liabilities assumed 2,208,991 369 2,209,360 Equity 244,292 (244,292 ) -- Total equity assumed 244,292 (244,292 ) -- Total liabilities and equity assumed $ 2,453,283 $ (243,923 ) $ 2,209,360 Net assets acquired 219,084 Purchase price 457,103 Goodwill $ 238,019 The purchase price allocation and certain fair value measurements remain preliminary due to the timing of the acquisition. Management will continue to review the estimated fair values and evaluate the assumed tax positions. The Company expects to finalize its analysis of the acquired assets and assumed liabilities in this transaction over the next few months, within one may The Company’s operating results for 2017 Summary of Unaudited Pro forma Information The unaudited pro forma information below for the years ended December 31, 2017 2016 January 1, 2016. December 31, 2017 $9.4 2017. not (In thousands, except per share data) 2017 2016 Revenue (1) $ 654,358 $ 620,461 Net income $ 130,947 $ 136,199 Diluted earnings per share $ 1.43 $ 1.52 _________________________ ( 1 Consolidated year-to-date 2017 $29.2 $10.5 $27.6 $5.7 Hardeman County Investment Company, Inc. On May 15, 2017, 1,599,940 $42.6 May 15, 2017, $30.0 Prior to the acquisition, Hardeman conducted banking business from 10 $462.9 $251.6 $389.0 September 2017. five Goodwill of $29.4 two not A summary, at fair value, of the assets acquired and liabilities assumed in the Hardeman transaction, as of the acquisition date, is as follows: (In thousands) Acquired from Fair Value Fair Assets Acquired Cash and due from banks $ 8,001 $ -- $ 8,001 Interest bearing balances due from banks - time 1,984 -- 1,984 Investment securities 170,654 (285 ) 170,369 Loans acquired 257,641 (5,992 ) 251,649 Allowance for loan losses (2,382 ) 2,382 -- Foreclosed assets 1,083 (452 ) 631 Premises and equipment 9,905 1,258 11,163 Bank owned life insurance 7,819 -- 7,819 Goodwill 11,485 (11,485 ) -- Core deposit intangible -- 7,840 7,840 Other intangibles -- 830 830 Other assets 2,639 (1 ) 2,638 Total assets acquired $ 468,829 $ (5,905 ) $ 462,924 Liabilities Assumed Deposits: Non-interest bearing transaction accounts $ 76,555 $ -- $ 76,555 Interest bearing transaction accounts and savings deposits 214,872 -- 214,872 Time deposits 97,917 (368 ) 97,549 Total deposits 389,344 (368 ) 388,976 Securities sold under agreement to repurchase 17,163 -- 17,163 Other borrowings 3,000 -- 3,000 Subordinated debentures 6,702 -- 6,702 Accrued interest and other liabilities 1,891 1,924 3,815 Total liabilities assumed 418,100 1,556 419,656 Equity 50,729 (50,729 ) -- Total equity assumed 50,729 (50,729 ) -- Total liabilities and equity assumed $ 468,829 $ (49,173 ) $ 419,656 Net assets acquired 43,268 Purchase price 72,639 Goodwill $ 29,371 The purchase price allocation and certain fair value measurements remain preliminary due to the timing of the acquisition. Management will continue to review the estimated fair values and evaluate the assumed tax positions. The Company expects to finalize its analysis of the acquired assets and assumed liabilities in this transaction over the next few months, within one may The Company’s operating results for 2017 Citizens National Bank On September 9, 2016, 1,671,482 $41.3 September 9, 2016, $35.0 Prior to the acquisition, Citizens conducted banking business from 9 $585.1 $340.9 $509.9 October 2016. Goodwill of $23.4 two A summary, at fair value, of the assets acquired and liabilities assumed in the Citizens transaction, as of the acquisition date, is as follows: (In thousands) Acquired from Fair Value Fair Assets Acquired Cash and due from banks $ 131,467 $ (351 ) $ 131,116 Federal funds sold 10,000 -- 10,000 Investment securities 61,987 1 61,988 Loans acquired 350,361 (9,511 ) 340,850 Allowance for loan losses (4,313 ) 4,313 -- Foreclosed assets 4,960 (1,518 ) 3,442 Premises and equipment 6,746 1,339 8,085 Bank owned life insurance 6,632 -- 6,632 Core deposit intangible -- 5,075 5,075 Other intangibles -- 591 591 Other assets 17,364 6 17,370 Total assets acquired $ 585,204 $ (55 ) $ 585,149 Liabilities Assumed Deposits: Non-interest bearing transaction accounts $ 109,281 $ -- $ 109,281 Interest bearing transaction accounts and savings deposits 204,912 -- 204,912 Time deposits 195,664 -- 195,664 Total deposits 509,857 -- 509,857 Securities sold under agreement to repurchase 13,233 -- 13,233 FHLB borrowings 4,000 47 4,047 Accrued interest and other liabilities 3,558 1,530 5,088 Total liabilities assumed 530,648 1,577 532,225 Equity 54,556 (54,556 ) -- Total equity assumed 54,556 (54,556 ) -- Total liabilities and equity assumed $ 585,204 $ (52,979 ) $ 532,225 Net assets acquired 52,924 Purchase price 76,300 Goodwill $ 23,376 During 2017, The Company’s operating results for 2017 2016 Liberty Bancshares, Inc. On February 27, 2015, 10,362,674 $212.2 February 27, 2015 Prior to the acquisition, Liberty conducted banking business from 24 $1.1 $780.7 $874.7 April 2015. Goodwill of $95.2 two not A summary, at fair value, of the assets acquired and liabilities assumed in the Liberty transaction, as of the acquisition date, is as follows: (In thousands) Acquired from Fair Value Fair Assets Acquired Cash and due from banks, including time deposits $ 102,637 $ (14 ) $ 102,623 Federal funds sold 7,060 -- 7,060 Investment securities 99,123 (335 ) 98,788 Loans acquired, not covered by FDIC loss share 790,493 (9,835 ) 780,658 Allowance for loan losses (10,422 ) 10,422 -- Premises and equipment 34,239 (3,215 ) 31,024 Bank owned life insurance 16,972 -- 16,972 Core deposit intangible 699 13,857 14,556 Other intangibles 3,063 (3,063 ) -- Other assets 17,703 (3,112 ) 14,591 Total assets acquired $ 1,061,567 $ 4,705 $ 1,066,272 Liabilities Assumed Deposits: Non-interest bearing transaction accounts $ 146,618 $ -- $ 146,618 Interest bearing transaction accounts and savings deposits 543,183 -- 543,183 Time deposits 184,913 -- 184,913 Total deposits 874,714 -- 874,714 FHLB borrowings 46,128 223 46,351 Subordinated debentures 20,620 (510 ) 20,110 Accrued interest and other liabilities 7,828 300 8,128 Total liabilities assumed 949,290 13 949,303 Equity 112,277 (112,277 ) -- Total equity assumed 112,277 (112,277 ) -- Total liabilities and equity assumed $ 1,061,567 $ (112,264 ) $ 949,303 Net assets acquired 116,969 Purchase price 212,176 Goodwill $ 95,207 During 2015 The Company’s operating results for all periods presented include the operating results of the acquired assets and assumed liabilities of Liberty subsequent to the acquisition date. Community First Bancshares, Inc. On February 27, 2015, 13,105,830 $268.3 February 27, 2015, $9,974 $30.9 January 29, 2016, Prior to the acquisition, Community First conducted banking business from 33 $1.9 $1.1 $1.5 September 2015. Goodwill of $110.4 two not A summary, at fair value, of the assets acquired and liabilities assumed in the Community First transaction, as of the acquisition date, is as follows: (In thousands) Acquired from Fair Value Fair Assets Acquired Cash and due from banks $ 39,848 $ -- $ 39,848 Federal funds sold 76,508 -- 76,508 Investment securities 570,199 (3,381 ) 566,818 Loans acquired, not covered by FDIC loss share 1,163,398 (26,855 ) 1,136,543 Allowance for loan losses (14,635 ) 14,635 -- Foreclosed assets not covered by FDIC loss share 747 -- 747 Premises and equipment 44,837 (2,794 ) 42,043 Bank owned life insurance 22,149 -- 22,149 Goodwill 100 (100 ) -- Core deposit intangible -- 11,273 11,273 Other intangibles -- 420 420 Deferred tax asset 3,700 3,538 7,238 Other assets 11,474 -- 11,474 Total assets acquired $ 1,918,325 $ (3,264 ) $ 1,915,061 Liabilities Assumed Deposits: Non-interest bearing transaction accounts $ 103,825 $ -- $ 103,825 Interest bearing transaction accounts and savings deposits 995,207 -- 995,207 Time deposits 436,181 849 437,030 Total deposits 1,535,213 849 1,536,062 Federal funds purchased and securities sold under agreement to repurchase 16,230 -- 16,230 FHLB borrowings 143,047 674 143,721 Subordinated debentures 21,754 (840 ) 20,914 Accrued interest and other liabilities 8,769 601 9,370 Total liabilities assumed 1,725,013 1,284 1,726,297 Equity 193,312 (193,312 ) -- Total equity assumed 193,312 (193,312 ) -- Total liabilities and equity assumed $ 1,918,325 $ (192,028 ) $ 1,726,297 Net assets acquired 188,764 Purchase price 299,204 Goodwill $ 110,440 During 2015 The Company’s operating results for all periods presented include the operating results of the acquired assets and assumed liabilities of Community First subsequent to the acquisition date. Ozark Trust & Investment Corporation On October 29, 2015, 678,580 $17.9 October 29, 2015, $5.8 Prior to the acquisition, Ozark Trust had over $1 1,000 February 2015. A summary, at fair value, of the assets acquired and liabilities assumed in the Ozark Trust transaction, as of the acquisition date, is as follows: (In thousands) Acquired from Fair Value Fair Assets Acquired Cash $ 1,756 $ -- $ 1,756 Investment securities 241 -- 241 Premises and equipment 1,126 418 1,544 Other intangibles -- 9,733 9,733 Other assets 752 869 1,621 Total assets acquired $ 3,875 $ 11,020 $ 14,895 Liabilities Assumed Deferred tax liability 63 4,175 4,238 Accrued and other liabilities 302 -- 302 Total liabilities assumed 365 4,175 4,540 Equity 3,510 (3,510 ) -- Total equity assumed 3,510 (3,510 ) -- Total liabilities and equity assumed $ 3,875 $ 665 $ 4,540 Net assets acquired 10,355 Purchase price 23,623 Goodwill $ 13,268 During 2015 The Company’s operating results for all periods presented include the operating results of the acquired assets and assumed liabilities of Ozark Trust subsequent to the acquisition date. The following is a description of the methods used to determine the fair values of significant assets and liabilities presented in the acquisitions above. Cash and due from banks, time deposits due from banks and federal funds sold Investment securities Loans acquired not not Foreclosed assets Premises and equipment Bank owned life insurance Goodwill Core deposit intangible Other intangibles Other assets Deposits Federal funds purchased and securities sold under agreement to repurchase FHLB and other borrowings Subordinated debentures – Accrued interest and other liabilities

Note 3 - Investment Securities

Note 3 - Investment Securities	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	NOTE 3: The amortized cost and fair value of investment securities that are classified as held-to-maturity (“HTM”) and available-for-sale (“AFS”) are as follows: Years Ended December 31 2017 2016 (In thousands) Amortized Gross Gross Estimated Amortized Gross Gross Estimated Held-to-Maturity U.S. Government agencies $ 46,945 $ 7 $ (228 ) $ 46,724 $ 76,875 $ 107 $ (182 ) $ 76,800 Mortgage-backed securities 16,132 8 (287 ) 15,853 19,773 63 (249 ) 19,587 State and political subdivisions 301,491 5,962 (222 ) 307,231 362,532 4,967 (842 ) 366,657 Other securities 3,490 -- -- 3,490 2,916 -- -- 2,916 Total HTM $ 368,058 $ 5,977 $ (737 ) $ 373,298 $ 462,096 $ 5,137 $ (1,273 ) $ 465,960 Available-for-Sale U.S. Treasury $ -- $ -- $ -- $ -- $ 300 $ -- $ -- $ 300 U.S. Government agencies 141,559 116 (1,951 ) 139,724 140,005 67 (2,301 ) 137,771 Mortgage-backed securities 1,208,017 246 (20,946 ) 1,187,317 885,783 178 (17,637 ) 868,324 State and political subdivisions 144,642 532 (2,009 ) 143,165 108,374 38 (5,469 ) 102,943 Other securities 118,106 1,206 (1 ) 119,311 47,022 996 (2 ) 48,016 Total AFS $ 1,612,324 $ 2,100 $ (24,907 ) $ 1,589,517 $ 1,181,484 $ 1,279 $ (25,409 ) $ 1,157,354 Securities with limited marketability, such as stock in the Federal Reserve Bank and the Federal Home Loan Bank, are carried at cost and are reported as other AFS securities in the table above. Certain investment securities are valued at less than their historical cost. Total fair value of these investments at December 31, 2017 2016, $1.4 $1.2 73.5% 75.7%, The following table shows the gross unrealized losses and fair value of the Company’s investments with unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at: Less Than 12 Months 12 Months or More Total (In thousands) Estimated Gross Estimated Gross Estimated Gross December 31, 2017 Held-to-Maturity U.S. Government agencies $ 11,961 $ 6 $ 32,778 $ 222 $ 44,739 $ 228 Mortgage-backed securities 5,471 47 8,946 240 14,417 287 State and political subdivisions 40,299 198 1,887 24 42,186 222 Total HTM $ 57,731 $ 251 $ 43,611 $ 486 $ 101,342 $ 737 Available-for-Sale U.S. Government agencies $ 91,988 $ 921 $ 25,742 $ 1,030 $ 117,730 $ 1,951 Mortgage-backed securities 510,770 4,516 609,329 16,430 1,120,099 20,946 State and political subdivisions 25,049 202 75,404 1,807 100,453 2,009 Other securities -- -- 99 1 99 1 Total AFS $ 627,807 $ 5,639 $ 710,574 $ 19,268 $ 1,338,381 $ 24,907 December 31, 2016 Held-to-Maturity U.S. Government agencies $ 32,859 $ 141 $ 19,959 $ 41 $ 52,818 $ 182 Mortgage-backed securities 11,833 205 1,465 44 13,298 249 State and political subdivisions 104,974 841 330 1 105,304 842 Total HTM $ 149,666 $ 1,187 $ 21,754 $ 86 $ 171,420 $ 1,273 Available-for-Sale U.S. Government agencies $ 126,325 $ 2,301 $ -- $ -- $ 126,325 $ 2,301 Mortgage-backed securities 833,393 17,637 -- -- 833,393 17,637 State and political subdivisions 94,922 5,469 -- -- 94,922 5,469 Other securities 99 2 -- -- 99 2 Total AFS $ 1,054,739 $ 25,409 $ -- $ -- $ 1,054,739 $ 25,409 These declines primarily resulted from the rate for these investments yielding less than current market rates. Based on evaluation of available evidence, management believes the declines in fair value for these securities are temporary. Management does not not not Declines in the fair value of HTM and AFS securities below their cost that are deemed to be other than temporary are reflected in earnings as realized losses. In estimating other-than-temporary impairment losses, management considers, among other things, (i) the length of time and the extent to which the fair value has been less than cost, (ii) the financial condition and near-term prospects of the issuer, and (iii) the intent and ability of the Company to retain its investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value. Management has the ability and intent to hold the securities classified as HTM until they mature, at which time the Company expects to receive full value for the securities. Furthermore, as of December 31, 2017, not December 31, 2017, Income earned on securities for the years ended December 31, 2017, 2016 2015, (In thousands) 2017 2016 2015 Taxable Held-to-maturity $ 2,521 $ 3,778 $ 5,162 Available-for-sale 25,996 17,928 12,129 Non-taxable Held-to-maturity 8,693 10,641 11,635 Available-for-sale 2,905 1,132 1,687 Total $ 40,115 $ 33,479 $ 30,613 The amortized cost and estimated fair value by maturity of securities are shown in the following table. Securities are classified according to their contractual maturities without consideration of principal amortization, potential prepayments or call options. Accordingly, actual maturities may Held-to-Maturity Available-for-Sale (In thousands) Amortized Fair Amortized Fair Value One year or less $ 46,377 $ 46,255 $ 590 $ 591 After one through five years 85,451 85,581 35,616 35,246 After five through ten years 92,361 93,400 24,203 23,953 After ten years 127,737 132,209 225,892 223,198 Securities not due on a single maturity date 16,132 15,853 1,208,017 1,187,317 Other securities (no maturity) -- -- 118,006 119,212 Total $ 368,058 $ 373,298 $ 1,612,324 $ 1,589,517 The carrying value, which approximates the fair value, of securities pledged as collateral, to secure public deposits and for other purposes, amounted to $1.2 December 31, 2017 $915.2 December 31, 2016. There were $2.4 $1.3 December 31, 2017. $5.8 no December 31, 2016. $350,000 $43,000 December 31, 2015. 39.225% The state and political subdivision debt obligations are predominately non-rated bonds representing small issuances, primarily in Arkansas, Missouri, Oklahoma, Tennessee and Texas issues, which are evaluated on an ongoing basis.

Note 4 - Other Assets and Other

Note 4 - Other Assets and Other Liabilities Held for Sale	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]	NOTE 4: In August 2017, $165.8 $157.4 December 31, 2017. In December 2017, March 2018 one The following is a description of the methods used to determine the purchase price allocation for fair values of significant assets and liabilities presented in the Heartland Bank transaction. Cash and due from banks, time deposits due from banks and federal funds sold Investment securities no Loans acquired not not Premises and equipment Core deposit intangible Deposits not

Note 5 - Loans and Allowance fo

Note 5 - Loans and Allowance for Loan Losses	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	NOTE 5: LOANS AND ALLOWANCE FOR LOAN LOSSES At December 31, 2017, $10.78 $5.63 December 31, 2016. (In thousands) 2017 2016 Consumer: Credit cards $ 185,422 $ 184,591 Other consumer 280,094 303,972 Total consumer 465,516 488,563 Real estate: Construction 614,155 336,759 Single family residential 1,094,633 904,245 Other commercial 2,530,824 1,787,075 Total real estate 4,239,612 3,028,079 Commercial: Commercial 825,217 639,525 Agricultural 148,302 150,378 Total commercial 973,519 789,903 Other 26,962 20,662 Loans 5,705,609 4,327,207 Loans acquired, net of discount and allowance (1) 5,074,076 1,305,683 Total loans $ 10,779,685 $ 5,632,890 ______________________ ( 1 See Note 6, Loan Origination/Risk Management may eight Consumer Real estate one Commercial one three Nonaccrual and Past Due Loans not may may not Nonaccrual loans, excluding loans acquired, at December 31, 2017 2016, (In thousands) 2017 2016 Consumer: Credit cards $ 170 $ 373 Other consumer 4,605 1,793 Total consumer 4,775 2,166 Real estate: Construction 2,242 3,411 Single family residential 13,431 12,139 Other commercial 16,054 12,385 Total real estate 31,727 27,935 Commercial: Commercial 6,980 7,765 Agricultural 2,160 1,238 Total commercial 9,140 9,003 Total $ 45,642 $ 39,104 An age analysis of past due loans, excluding loans acquired, segregated by class of loans, is as follows: (In thousands) Gross 90 Days Total Current Total 90 Days December 31, 2017 Consumer: Credit cards $ 707 $ 672 $ 1,379 $ 184,043 $ 185,422 $ 332 Other consumer 5,009 3,298 8,307 271,787 280,094 10 Total consumer 5,716 3,970 9,686 455,830 465,516 342 Real estate: Construction 411 1,210 1,621 612,534 614,155 -- Single family residential 8,071 6,460 14,531 1,080,102 1,094,633 1 Other commercial 2,388 8,031 10,419 2,520,405 2,530,824 -- Total real estate 10,870 15,701 26,571 4,213,041 4,239,612 1 Commercial: Commercial 1,523 6,125 7,648 817,569 825,217 -- Agricultural 50 2,120 2,170 146,132 148,302 Total commercial 1,573 8,245 9,818 963,701 973,519 -- Other -- -- -- 26,962 26,962 -- Total $ 18,159 $ 27,916 $ 46,075 $ 5,659,534 $ 5,705,609 $ 343 December 31, 2016 Consumer: Credit cards $ 716 $ 275 $ 991 $ 183,600 $ 184,591 $ 275 Other consumer 3,786 1,027 4,813 299,159 303,972 11 Total consumer 4,502 1,302 5,804 482,759 488,563 286 Real estate: Construction 1,420 1,246 2,666 334,093 336,759 -- Single family residential 6,310 5,927 12,237 892,008 904,245 14 Other commercial 4,212 6,722 10,934 1,776,141 1,787,075 -- Total real estate 11,942 13,895 25,837 3,002,242 3,028,079 14 Commercial: Commercial 2,040 5,296 7,336 632,189 639,525 -- Agricultural 121 1,215 1,336 149,042 150,378 -- Total commercial 2,161 6,511 8,672 781,231 789,903 -- Other -- -- -- 20,662 20,662 -- Total $ 18,605 $ 21,708 $ 40,313 $ 4,286,894 $ 4,327,207 $ 300 Impaired Loans not 90 Impairment is evaluated in total for smaller-balance loans of a similar nature and on an individual loan basis for other loans. Impaired loans, or portions thereof, are charged-off when deemed uncollectible. Impaired loans, net of government guarantees and excluding loans acquired, segregated by class of loans, are as follows: (In thousands) Unpaid Recorded Recorded Total Related Average Interest December 31, 2017 Consumer: Credit cards $ 170 $ 170 $ -- $ 170 $ -- $ 268 $ 47 Other consumer 4,755 4,605 -- 4,605 -- 3,089 106 Total consumer 4,925 4,775 -- 4,775 -- 3,357 153 Real estate: Construction 2,522 1,347 895 2,242 249 2,711 93 Single family residential 14,347 12,725 706 13,431 53 12,904 443 Other commercial 22,308 6,732 9,133 15,865 36 18,624 639 Total real estate 39,177 20,804 10,734 31,538 338 34,239 1,175 Commercial: Commercial 9,954 4,306 2,269 6,575 -- 11,670 400 Agricultural 3,278 1,035 -- 1,035 -- 1,522 52 Total commercial 13,232 5,341 2,269 7,610 -- 13,192 452 Total $ 57,334 $ 30,920 $ 13,003 $ 43,923 $ 338 $ 50,788 $ 1,780 December 31, 2016 Consumer: Credit cards $ 373 $ 373 $ -- $ 373 $ -- $ 346 $ 20 Other consumer 1,836 1,797 3 1,800 1 1,066 47 Total consumer 2,209 2,170 3 2,173 1 1,412 67 Real estate: Construction 4,275 1,038 2,374 3,412 156 4,436 196 Single family residential 12,970 10,630 1,753 12,383 162 9,486 419 Other commercial 20,993 6,891 7,315 14,206 99 14,932 659 Total real estate 38,238 18,559 11,442 30,001 417 28,854 1,274 Commercial: Commercial 11,848 2,734 7,573 10,307 262 4,666 206 Agricultural 2,226 1,215 -- 1,215 -- 1,046 46 Total commercial 14,074 3,949 7,573 11,522 262 5,712 252 Total $ 54,521 $ 24,678 $ 19,018 $ 43,696 $ 680 $ 35,978 $ 1,593 At December 31, 2017, December 31, 2016, $43.9 $43.7 $338,000 $680,000 December 31, 2017 2016, $1.8 $1.6 $1.2 $50.8 $36.0 $16.7 2017, 2016 2015, 2017, 2016 2015 not Included in certain impaired loan categories are troubled debt restructurings (“TDRs”). When the Company restructures a loan to a borrower that is experiencing financial difficulty and grants a concession that it would not Under ASC Topic 310 10 35 Subsequent Measurement Once an obligation has been restructured because of such credit problems, it continues to be considered a TDR until paid in full; or, if an obligation yields a market interest rate and no not 1 2 six The following table presents a summary of troubled debt restructurings, excluding loans acquired, segregated by class of loans. Accruing TDR Loans Nonaccrual TDR Loans Total TDR Loans (Dollars in thousands) Number Balance Number Balance Number Balance December 31, 2017 Real estate: Construction -- $ -- $ 1 $ 420 $ 1 $ 420 Single-family residential 4 141 15 954 19 1,095 Other commercial 4 4,322 5 3,712 9 8,034 Total real estate 8 4,463 21 5,086 29 9,549 Commercial: Commercial 5 2,644 6 745 11 3,389 Total commercial 5 2,644 6 745 11 3,389 Total 13 $ 7,107 27 $ 5,831 40 $ 12,938 December 31, 2016 Consumer: Other consumer -- $ -- 1 $ 3 1 $ 3 Total consumer -- -- 1 3 1 3 Real estate: Construction -- -- 1 18 1 18 Single-family residential 3 167 29 2,078 32 2,245 Other commercial 23 9,048 2 780 25 9,828 Total real estate 26 9,215 32 2,876 58 12,091 Commercial: Commercial 15 1,783 5 297 20 2,080 Total commercial 15 1,783 5 297 20 2,080 Total 41 $ 10,998 38 $ 3,176 79 $ 14,174 The following table presents loans that were restructured as TDRs during the years ended December 31, 2017 2016, Modification Type (Dollars in thousands) Number of Balance Prior Balance at Change in Change in Financial Impact Year Ended December 31, 2017 Real estate: Construction 1 $ 456 $ 456 $ 456 $ -- $ -- Single-family residential 1 139 130 130 -- -- Other commercial 3 7,715 7,715 7,715 -- 33 Total real estate 5 8,310 8,301 8,301 -- 33 Commercial: Commercial 11 2,691 2,604 2,565 39 -- Total commercial 11 2,691 2,604 2,565 39 -- Total 16 $ 11,001 $ 10,905 $ 10,866 $ 39 $ 33 Year Ended December 31, 2016 Consumer: Other consumer 2 $ 50 $ 11 $ 11 $ -- $ -- Total consumer 2 50 11 11 -- -- Real estate: Single-family residential 23 1,570 1,518 964 554 -- Other commercial 28 10,291 10,260 9,128 1,132 -- Total real estate 51 11,861 11,778 10,092 1,686 -- Commercial: Commercial 17 1,996 1,968 1,968 -- -- Total commercial 17 1,996 1,968 1,968 -- -- Total 70 $ 13,907 $ 13,757 $ 12,071 $ 1,686 $ -- During the year ended December 31, 2017, sixteen $11.0 12 $26,000 $33,000 December 31, 2017, thirteen $1.2 During year ended December 31, 2016, seventy $13.9 12 $402,000 no not December 31, 2016, fifteen $3.7 There was one December 31, 2017, 12 $440,000 third 2017. one December 31, 2017, 12 90 During the year ended December 31, 2016, one 12 $39,000 one December 31, 2016, 12 $31,000 $69,000 In addition to the TDRs that occurred during the period provided in the preceding tables, the Company had TDRs with pre-modification loan balances of $236,000 December 31, 2016 no December 31, 2017 December 31, 2017 2016, $5,057,000 $1,714,000, December 31, 2017 2016, $3,828,000 $5,094,000, Credit Quality Indicators The Company utilizes a risk rating matrix to assign a risk rate to each of its commercial and real estate loans. Loans are rated on a scale of 1 8. 8 · Risk Rate 1 · Risk Rate 2 · Risk Rate 3 · Risk Rate 4 may may first may one may one · Risk Rate 5 may not not may may · Risk Rate 6 not not may · Risk Rate 7 may · Risk Rate 8 not not no not may Loans acquired are evaluated using this internal grading system. Loans acquired are evaluated individually and include purchased credit impaired loans of $17.1 $17.8 310 30 6 December 31, 2017 2016, 310 20, $76.3 $47.8 6, 7 8 December 31, 2017 2016, Loans acquired, covered by loss share agreements, had additional protection provided by the FDIC prior to the termination of the loss share agreements. During the 2015 $954,000 $0.4 December 31, 2015. no no 2016 2017. $954,000 6, Purchased credit impaired loans are loans that showed evidence of deterioration of credit quality since origination and for which it is probable, at acquisition, that the Company will be unable to collect all amounts contractually owed. Their fair value was initially based on the estimate of cash flows, both principal and interest, expected to be collected or estimated collateral values if cash flows are not not Classified loans for the Company include loans in Risk Ratings 6, 7 8. may not one 1 6 8 not not 2 not not 310 30, $175.6 $166.0 December 31, 2017 December 31, 2016, The following table presents a summary of loans by credit risk rating, segregated by class of loans. (In thousands) Risk Rate Risk Rate Risk Rate Risk Rate Risk Rate Total December 31, 2017 Consumer: Credit cards $ 184,920 $ -- $ 502 $ -- $ -- $ 185,422 Other consumer 275,160 -- 4,934 -- -- 280,094 Total consumer 460,080 -- 5,436 -- -- 465,516 Real estate: Construction 603,126 5,795 5,218 16 -- 614,155 Single family residential 1,066,902 3,954 23,490 287 -- 1,094,633 Other commercial 2,480,293 19,581 30,950 -- -- 2,530,824 Total real estate 4,150,321 29,330 59,658 303 -- 4,239,612 Commercial: Commercial 736,377 74,254 14,402 50 134 825,217 Agricultural 146,065 24 2,190 23 -- 148,302 Total commercial 882,442 74,278 16,592 73 134 973,519 Other 26,962 -- -- -- -- 26,962 Loans acquired 4,782,384 198,314 93,378 -- -- 5,074,076 Total $ 10,302,189 $ 301,922 $ 175,064 $ 376 $ 134 $ 10,779,685 (In thousands) Risk Rate Risk Rate Risk Rate Risk Rate Risk Rate Total December 31, 2016 Consumer: Credit cards $ 183,943 $ -- $ 648 $ -- $ -- $ 184,591 Other consumer 301,632 26 2,314 -- -- 303,972 Total consumer 485,575 26 2,962 -- -- 488,563 Real estate: Construction 330,080 98 6,565 16 -- 336,759 Single family residential 875,603 4,024 24,460 158 -- 904,245 Other commercial 1,738,207 6,874 41,994 -- -- 1,787,075 Total real estate 2,943,890 10,996 73,019 174 -- 3,028,079 Commercial: Commercial 616,805 558 22,162 -- -- 639,525 Agricultural 148,218 104 2,033 -- 23 150,378 Total commercial 765,023 662 24,195 -- 23 789,903 Other 20,662 -- -- -- -- 20,662 Loans acquired 1,217,886 22,181 64,075 1,541 -- 1,305,683 Total $ 5,433,036 $ 33,865 $ 164,251 $ 1,715 $ 23 $ 5,632,890 Net (charge-offs)/recoveries for the years ended December 31, 2017 2016, (In thousands) 2017 2016 Consumer: Credit cards $ (2,884 ) $ (2,288 ) Other consumer (1,528 ) (1,459 ) Total consumer (4,412 ) (3,747 ) Real estate: Construction 100 (16 ) Single family residential (1,045 ) (706 ) Other commercial (6,054 ) (6,444 ) Total real estate (6,999 ) (7,166 ) Commercial: Commercial (7,734 ) (1,255 ) Agricultural -- (2,336 ) Total commercial (7,734 ) (3,591 ) Total $ (19,145 ) $ (14,504 ) Allowance for Loan Losses Allowance for Loan Losses 310 10, Receivables 450 20, Loss Contingencies As mentioned above, allocations to the allowance for loan losses are categorized as either specific allocations or general allocations. A loan is considered impaired when it is probable that the Company will not not The general allocation is calculated monthly based on management’s assessment of several factors such as ( 1 2 3 4 5 6 7 8 one four The following table details activity in the allowance for loan losses by portfolio segment for the years ended December 31, 2017 2016. one not (In thousands) Commercial Real Credit Other Total December 31, 2017 Balance, beginning of year (2) $ 7,739 $ 21,817 $ 3,779 $ 2,951 $ 36,286 Provision for loan losses (1) 7,002 12,463 2,889 2,173 24,527 Charge-offs (7,837 ) (7,989 ) (3,905 ) (3,767 ) (23,498 ) Recoveries 103 990 1,021 2,239 4,353 Net charge-offs (7,734 ) (6,999 ) (2,884 ) (1,528 ) (19,145 ) Balance, end of year (2) $ 7,007 $ 27,281 $ 3,784 $ 3,596 $ 41,668 Period-end amount allocated to: Loans individually evaluated for impairment $ -- $ 338 $ -- $ -- $ 338 Loans collectively evaluated for impairment 7,007 26,943 3,784 3,596 41,330 Balance, end of year (2) $ 7,007 $ 27,281 $ 3,784 $ 3,596 $ 41,668 December 31, 2016 Balance, beginning of year (2) $ 5,985 $ 19,522 $ 3,893 $ 1,951 $ 31,351 Provision for loan losses (1) 5,345 9,461 2,174 2,459 19,439 Charge-offs (3,956 ) (7,517 ) (3,195 ) (1,975 ) (16,643 ) Recoveries 365 351 907 516 2,139 Net charge-offs (3,591 ) (7,166 ) (2,288 ) (1,459 ) (14,504 ) Balance, end of year (2) $ 7,739 $ 21,817 $ 3,779 $ 2,951 $ 36,286 Period-end amount allocated to: Loans individually evaluated for impairment $ 262 $ 417 $ -- $ 1 $ 680 Loans collectively evaluated for impairment 7,477 21,400 3,779 2,950 35,606 Balance, end of year (2) $ 7,739 $ 21,817 $ 3,779 $ 2,951 $ 36,286 ( 1 Provision for loan losses of $1,866,000 December 31, 2017 ( December 31, 2017 $26,393,000 $2.4 December 31, 2017 $418,000. $626,000 December 31, 2016 ( December 31, 2016 $20,065,000 $626,000 no ( 2 Allowance for loan losses at December 31, 2017 $418,000 not December 31, 2016 2015 $954,000 December 31, 2017, 2016 2015 $42,086,000, $37,240,000 $32,305,000, Activity in the allowance for loan losses for the year ended December 31, 2015 (In thousands) Commercial Real Credit Other Total December 31, 2015 Balance, beginning of year $ 6,962 $ 15,161 $ 5,445 $ 1,460 $ 29,028 Provision for loan losses 258 5,738 665 1,625 8,286 Charge-offs (1,415 ) (1,580 ) (3,107 ) (1,672 ) (7,774 ) Recoveries 180 203 890 538 1,811 Net charge-offs (1,235 ) (1,377 ) (2,217 ) (1,134 ) (5,963 ) Balance, end of year $ 5,985 $ 19,522 $ 3,893 $ 1,951 $ 31,351 The Company’s recorded investment in loans, excluding loans acquired, as of December 31, 2017 2016 (In thousands) Commercial Real Credit Other Total December 31, 2017 Loans individually evaluated for impairment $ 7,610 $ 31,538 $ 170 $ 4,605 $ 43,923 Loans collectively evaluated for impairment 965,909 4,208,074 185,252 302,451 5,661,686 Balance, end of period $ 973,519 $ 4,239,612 $ 185,422 $ 307,056 $ 5,705,609 December 31, 2016 Loans individually evaluated for impairment $ 11,522 $ 30,001 $ 373 $ 1,800 $ 43,696 Loans collectively evaluated for impairment 778,381 2,998,078 184,218 322,834 4,283,511 Balance, end of period $ 789,903 $ 3,028,079 $ 184,591 $ 324,634 $ 4,327,207

Note 6 - Loans Acquired

Note 6 - Loans Acquired	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Loans Acquired [Text Block]	NOTE 6: LOANS ACQUIRED During the fourth 2017, $1.985 $2.021 $36.3 2, 310 20, Nonrefundable Fees and Other Costs not $11.4 $18.1 $6.7 310 30, Loans and Debt Securities Acquired with Deteriorated Credit Quality not Also during the fourth 2017, $2.208 $2.246 $37.8 2, 310 20, Nonrefundable Fees and Other Costs not During the second 2017, $249.2 $254.2 $5.0 2, 310 20, Nonrefundable Fees and Other Costs not $2.4 $3.4 $990,000 310 30, Loans and Debt Securities Acquired with Deteriorated Credit Quality During the third 2016, $340.1 $348.8 $8.7 2, 310 20, Nonrefundable Fees and Other Costs not $757,000 $1.6 $848,000 310 30, Loans and Debt Securities Acquired with Deteriorated Credit Quality During the first 2015, $769.9 $774.8 $4.9 2, 310 20, Nonrefundable Fees and Other Costs not $10.7 $15.7 $5.0 310 30. Also during the first 2015, $1.13 $1.15 $23.7 2, 310 20. not $7.0 $10.1 $3.1 310 30. See Note 2, On September 15, 2015, 2010 2012 four Under the terms of the agreement, the FDIC made a net payment of $2,368,000 one $7,476,000. not not The following table reflects the carrying value of all loans acquired as of December 31, 2017 2016: Loans Acquired (In thousands) 2017 2016 Consumer: Other consumer $ 51,467 $ 49,677 Total consumer 51,467 49,677 Real estate: Construction 637,032 57,587 Single family residential 793,228 423,176 Other commercial 2,387,777 690,108 Total real estate 3,818,037 1,170,871 Commercial: Commercial 995,587 81,837 Agricultural 66,576 3,298 Total commercial 1,062,163 85,135 Other 142,409 -- Total loans acquired (1) $ 5,074,076 $ 1,305,683 ( 1 Loans acquired are reported net of a $418,000 $954,000 December 31, 2017 2016, Nonaccrual loans acquired, excluding purchased credit impaired loans accounted for under ASC Topic 310 30, 5, (In thousands) December 31, December 31, Consumer: Other consumer $ 334 $ 456 Total consumer 334 456 Real estate: Construction 1,767 7,961 Single family residential 12,151 13,366 Other commercial 7,401 22,045 Total real estate 21,319 43,372 Commercial: Commercial 1,748 2,806 Agricultural 84 198 Total commercial 1,832 3,004 Total $ 23,485 $ 46,832 An age analysis of past due loans acquired segregated by class of loans, is as follows (see Note 5, (In thousands) Gross 90 Days Total Current Total 90 Days December 31, 2017 Consumer: Other consumer $ 889 $ 260 $ 1,149 $ 50,318 $ 51,467 $ 108 Total consumer 889 260 1,149 50,318 51,467 108 Real estate: Construction 2,577 1,448 4,025 633,007 637,032 279 Single family residential 12,936 3,302 16,238 776,990 793,228 126 Other commercial 17,176 5,647 22,823 2,364,954 2,387,777 2,565 Total real estate 32,689 10,397 43,086 3,774,951 3,818,037 2,970 Commercial: Commercial 2,344 1,039 3,383 992,204 995,587 67 Agricultural 51 -- 51 66,525 66,576 -- Total commercial 2,395 1,039 3,434 1,058,729 1,062,163 67 Other 15 -- 15 142,394 142,409 -- Total $ 35,988 $ 11,696 $ 47,684 $ 5,026,392 $ 5,074,076 $ 3,145 December 31, 2016 Consumer: Other consumer $ 571 $ 189 $ 760 $ 48,917 $ 49,677 $ -- Total consumer 571 189 760 48,917 49,677 -- Real estate: Construction 132 7,332 7,464 50,123 57,587 -- Single family residential 8,358 4,857 13,215 409,961 423,176 11 Other commercial 2,836 10,741 13,577 676,531 690,108 -- Total real estate 11,326 22,930 34,256 1,136,615 1,170,871 11 Commercial: Commercial 723 2,153 2,876 78,961 81,837 -- Agricultural 48 -- 48 3,250 3,298 -- Total commercial 771 2,153 2,924 82,211 85,135 -- Total $ 12,668 $ 25,272 $ 37,940 $ 1,267,743 $ 1,305,683 $ 11 The following table presents a summary of loans acquired by credit risk rating, segregated by class of loans (see Note 5, 310 30 1 4 (In thousands) Risk Rate Risk Rate Risk Rate Risk Rate Risk Rate Total December 31, 2017 Consumer: Other consumer $ 50,625 $ 21 $ 821 $ -- $ -- $ 51,467 Total consumer Real estate: Construction 468,610 166,710 1,712 -- -- 637,032 Single family residential 770,954 2,618 19,656 -- -- 793,228 Other commercial 2,337,097 15,064 35,616 -- -- 2,387,777 Total real estate 3,576,661 184,392 56,984 3,818,037 Commercial: Commercial 946,322 13,901 35,364 -- -- 995,587 Agricultural 66,367 -- 209 -- -- 66,576 Total commercial 1,012,689 13,901 35,573 -- -- 1,062,163 Other 142,409 -- -- -- -- 142,409 Total $ 4,782,384 $ 198,314 $ 93,378 $ -- $ -- $ 5,074,076 December 31, 2016 Consumer: Other consumer $ 48,992 $ 14 $ 671 $ -- $ -- $ 49,677 Total consumer 48,992 14 671 -- -- 49,677 Real estate: Construction 50,704 88 6,795 -- -- 57,587 Single family residential 400,553 2,696 18,392 1,535 -- 423,176 Other commercial 641,018 17,384 31,706 -- -- 690,108 Total real estate 1,092,275 20,168 56,893 1,535 -- 1,170,871 Commercial: Commercial 73,609 1,965 6,257 6 -- 81,837 Agricultural 3,010 34 254 -- -- 3,298 Total commercial 76,619 1,999 6,511 6 -- 85,135 Total $ 1,217,886 $ 22,181 $ 64,075 $ 1,541 $ -- $ 1,305,683 Loans acquired were individually evaluated and recorded at estimated fair value, including estimated credit losses, at the time of acquisition. These loans are systematically reviewed by the Company to determine the risk of losses that may The following is a summary of the loans acquired in the OKSB acquisition on October 19, 2017, (In thousands) Not Impaired Impaired Contractually required principal and interest at acquisition $ 2,021,388 $ 18,136 Non-accretable difference (expected losses and foregone interest) -- (6,731 ) Cash flows expected to be collected at acquisition 2,021,388 11,405 Accretable yield (36,340 ) -- Basis in acquired loans at acquisition $ 1,985,048 $ 11,405 The following is a summary of the loans acquired in the First Texas acquisition on October 19, 2017, (In thousands) Not Impaired Impaired Contractually required principal and interest at acquisition $ 2,246,212 $ -- Non-accretable difference (expected losses and foregone interest) -- -- Cash flows expected to be collected at acquisition 2,246,212 -- Accretable yield (37,834 ) -- Basis in acquired loans at acquisition $ 2,208,378 $ -- The following is a summary of the loans acquired in the Hardeman acquisition on May 15, 2017, (In thousands) Not Impaired Impaired Contractually required principal and interest at acquisition $ 254,189 $ 3,452 Non-accretable difference (expected losses and foregone interest) -- (990 ) Cash flows expected to be collected at acquisition 254,189 2,462 Accretable yield (5,002 ) -- Basis in acquired loans at acquisition $ 249,187 $ 2,462 The following is a summary of the loans acquired in the Citizens acquisition on September 9, 2016, (In thousands) Not Impaired Impaired Contractually required principal and interest at acquisition $ 348,756 $ 1,605 Non-accretable difference (expected losses and foregone interest) -- (848 ) Cash flows expected to be collected at acquisition 348,756 757 Accretable yield (8,663 ) -- Basis in acquired loans at acquisition $ 340,093 $ 757 The following is a summary of the loans acquired in the Liberty acquisition on February 27, 2015, (In thousands) Not Impaired Impaired Contractually required principal and interest at acquisition $ 774,777 $ 15,716 Non-accretable difference (expected losses and foregone interest) -- (4,978 ) Cash flows expected to be collected at acquisition 774,777 10,738 Accretable yield (4,869 ) 12 Basis in acquired loans at acquisition $ 769,908 $ 10,750 The following is a summary of the loans acquired in the Community First acquisition on February 27, 2015, (In thousands) Not Impaired Impaired Contractually required principal and interest at acquisition $ 1,153,255 $ 10,143 Non-accretable difference (expected losses and foregone interest) -- (3,247 ) Cash flows expected to be collected at acquisition 1,153,255 6,896 Accretable yield (23,712 ) 104 Basis in acquired loans at acquisition $ 1,129,543 $ 7,000 In addition to the accretable yield on acquired loans not may may not no The impact of these adjustments on the Company’s financial results for the years ended December 31, 2017, 2016 2015 (In thousands) 2017 2016 2015 Impact on net interest income $ 4,105 $ 3,072 $ 19,995 Non-interest income (1) -- -- (7,719 ) Net impact to pre-tax income 4,105 3,072 12,276 Net impact, net of taxes $ 2,495 $ 1,867 $ 7,461 ( 1 Negative non-interest income resulted from the amortization of the FDIC indemnification assets. Because the Company’s loss share agreements with the FDIC have been terminated, there will be no These adjustments will be recognized over the remaining lives of the purchased credit impaired loans. The accretable yield adjustments recorded in future periods will change as the Company continues to evaluate expected cash flows from the purchased credit impaired loans. Changes in the carrying amount of the accretable yield for all purchased impaired loans were as follows for the years ended December 31, 2017, 2016 2015. (In thousands) Accretable Carrying Balance, January 1, 2015 $ 20,635 $ 169,098 Additions (116 ) 17,750 Accretable yield adjustments 6,593 -- Accretion (21,038 ) 21,038 Payments and other reductions, net (5,120 ) (184,417 ) Balance, December 31, 2015 954 23,469 Additions 19 757 Accretable yield adjustments 5,122 -- Accretion (4,440 ) 4,440 Payments and other reductions, net -- (10,864 ) Balance, December 31, 2016 1,655 17,802 Additions -- 13,793 Accretable yield adjustments 4,893 -- Accretion (5,928 ) 5,928 Payments and other reductions, net -- (20,407 ) Balance, December 31, 2017 $ 620 $ 17,116 Purchased impaired loans are evaluated on an individual borrower basis. Because some loans evaluated by the Company were determined to have experienced impairment in the estimated credit quality or cash flows, the Company recorded a provision and established an allowance for loan losses for loans acquired resulting in a total allowance on loans acquired of $418,000 December 31, 2017 $954,000 December 31, 2016 2015. The purchase and assumption agreements for the FDIC-assisted acquisitions allowed for the FDIC to recover a portion of the funds previously paid out under the indemnification agreement in the event losses failed to reach the expected loss level under a claw back provision (“true-up provision”). The amount of the true-up provision for each acquisition was measured and recorded at Day 1 Under the terms of the loss share termination agreement, the FDIC made a net payment of $2.4 one $7.5 The following table presents a summary of the changes in the FDIC true-up provision for the year ended December 31, 2015 September 2015 no December 31, 2017 2016. (In thousands) FDIC True-up Balance, January 1, 2015 $ 8,308 Amortization expense 107 Adjustments related to changes in expected losses 720 Loss share termination agreement (9,135 ) Balance, December 31, 2015 $ --

Note 7 - Goodwill and Other Int

Note 7 - Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Goodwill and Intangible Assets Disclosure [Text Block]	NOTE 7: GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill is tested annually, or more often than annually, if circumstances warrant, for impairment. If the implied fair value of goodwill is lower than its carrying amount, goodwill impairment is indicated, and goodwill is written down to its implied fair value. Subsequent increases in goodwill value are not $842.7 December 31, 2017 $348.5 December 31, 2016. The Company recorded $228.9 $238.0 $29.4 $4.1 third 2017. $21.5 2016 $95.2 $110.4 $13.3 2015 2017, 2016 2015. Core deposit premiums are amortized over periods ranging from 10 15 $42.1 $7.3 $7.8 2017 $5.1 2016 $11.3 $14.6 2015 third 2015, $382,000. Intangible assets are being amortized over various periods ranging from 10 15 $830,000 2017 $591,000 2016 $420,000 2015. 2015, $9.7 $1.3 third 2017. The Company recorded $3.8 2017 The Company’s goodwill and other intangibles (carrying basis and accumulated amortization) at December 31, 2017 2016 (In thousands) 2017 2016 Goodwill $ 842,651 $ 348,505 Core deposit premiums: Gross carrying amount 105,984 48,692 Accumulated amortization (16,659 ) (10,625 ) Core deposit premiums, net 89,325 38,067 Books of business intangible: Gross carrying amount 15,414 15,884 Accumulated amortization (2,827 ) (1,716 ) Books of business intangible, net 12,587 14,168 Other intangibles: Gross carrying amount 6,037 2,068 Accumulated amortization (1,878 ) (1,344 ) Other intangibles, net 4,159 724 Other intangible assets, net 106,071 52,959 Total goodwill and other intangible assets $ 948,722 $ 401,464 Core deposit premium amortization expense recorded for the years ended December 31, 2017, 2016 2015 $6.0 $4.4 $3.9 December 31, 2017, 2016 2015 $414,000 December 31, 2017, 2016 2015 $1.1 $1.1 $528,000, The Company’s estimated remaining amortization expense on intangibles as of December 31, 2017 Year (In thousands) 2018 $ 11,355 2019 11,045 2020 11,032 2021 10,970 2022 10,918 Thereafter 50,751 Total $ 106,071

Note 8 - Time Deposits

Note 8 - Time Deposits	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Deposit Liabilities Disclosures [Text Block]	NOTE 8: TIME DEPOSITS Time deposits included approximately $735,970,000 $600,280,000 $100,000 December 31, 2017 2016, $396,771,000 $193,596,000 $250,000 December 31, 2017 2016, Brokered time deposits were $159,586,000 $7,040,000 December 31, 2017 2016, 2018 $966,158,000; 2019 $660,371,000; 2020 $170,969,000; 2021 $75,599,000; 2022 $59,633,000. Deposits are the Company's primary funding source for loans and investment securities. The mix and repricing alternatives can significantly affect the cost of this source of funds and, therefore, impact the interest margin.

Note 9 - Income Taxes

Note 9 - Income Taxes	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Income Tax Disclosure [Text Block]	NOTE 9: INCOME TAXES The provision for income taxes for the years ended December 31 (In thousands) 2017 2016 2015 Income taxes currently payable $ 38,732 $ 36,792 $ 19,301 Deferred income taxes 23,251 9,832 13,599 Provision for income taxes $ 61,983 $ 46,624 $ 32,900 The tax effects of temporary differences between the tax basis of assets and liabilities and their financial reporting amounts that give rise to deferred income tax assets and liabilities, and their approximate tax effects, are as follows as of December 31, 2017 2016: (In thousands) 2017 2016 Deferred tax assets: Loans acquired $ 19,885 $ 7,986 Allowance for loan losses 10,773 14,754 Valuation of foreclosed assets 2,852 3,958 Tax NOLs from acquisition 7,821 13,077 Deferred compensation payable 2,433 2,785 Accrued equity and other compensation 5,302 8,107 Acquired securities 578 1,098 Unrealized loss on available-for-sale securities 6,107 9,559 Other 8,813 7,101 Gross deferred tax assets 64,564 68,425 Deferred tax liabilities: Goodwill and other intangible amortization (32,572 ) (29,601 ) Accumulated depreciation (8,945 ) (5,370 ) Other (4,413 ) (5,877 ) Gross deferred tax liabilities (45,930 ) (40,848 ) Net deferred tax asset, included in other assets $ 18,634 $ 27,577 A reconciliation of income tax expense at the statutory rate to the Company's actual income tax expense is shown below for the years ended December 31: (In thousands) 2017 2016 2015 Computed at the statutory rate (35%) $ 54,223 $ 50,203 $ 37,543 Increase (decrease) in taxes resulting from: State income taxes, net of federal tax benefit 1,582 2,121 2,097 Discrete items related to ASU 2016-09 (1,480 ) -- -- Tax exempt interest income (5,135 ) (5,112 ) (5,432 ) Impact of DTA remeasurement 11,471 -- -- Section 382 adjustment -- -- (2,293 ) Other differences, net 1,322 (588 ) 985 Actual tax provision $ 61,983 $ 46,624 $ 32,900 The Company follows ASC Topic 740, Income Taxes not not fifty not first no not first no 740 no 2018 On December 22, 2017, “2017 2017 35% 21% December 31, 2017. December 22, 2017 21% 2017 one $11.5 On December 22, 2017, No. 118 118” 2017 118 not one 2017 740, 2017 740 2017 740 not 2017 not not December 31, 2017. 2017 2017 may In February 2018, No. 2018 02, Income Statement-Reporting Comprehensive Income (Topic 220 2018 02” 2017 2018 02 2018 02 fourth 2017, $3.0 The amount of unrecognized tax benefits may Section 382 2015 382 $35.6 382 2028 2035. The Company files income tax returns in the U.S. federal jurisdiction. The Company’s U.S. federal income tax returns are open and subject to examinations from the 2014 2014

Note 10 - Securities Sold Under

Note 10 - Securities Sold Under Agreements to Repurchase	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block]	NOTE 10: We utilize securities sold under agreements to repurchase to facilitate the needs of our customers and to facilitate secured short-term funding needs. Securities sold under agreements to repurchase are stated at the amount of cash received in connection with the transaction. We monitor collateral levels on a continuous basis. We may The gross amount of recognized liabilities for repurchase agreements was $122.0 $102.4 December 31, 2017 2016, December 31, 2017 2016 Remaining Contractual Maturity of the Agreements (In thousands) Overnight and Up to 30 Days 30-90 Days Greater than Total December 31, 2017 Repurchase agreements: U.S. Government agencies $ 122,019 $ -- $ -- $ -- $ 122,019 December 31, 2016 Repurchase agreements: U.S. Government agencies $ 101,647 $ -- $ -- $ 757 $ 102,404

Note 11 - Other Borrowings and

Note 11 - Other Borrowings and Subordinated Debentures	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Debt Disclosure [Text Block]	NOTE 11: OTHER BORROWINGS AND SUBORDINATED DEBENTURES Debt at December 31, 2017 2016 (In thousands) 2017 2016 Other Borrowings FHLB advances, net of discount, due 2018 to 2033, 1.20% to 7.37% secured by residential real estate loans $ 1,261,642 $ 225,230 Revolving credit agreement, due 10/5/2018, floating rate of 1.50% above the one month LIBOR rate, unsecured 75,000 -- Notes payable, due 10/15/2020, 3.85%, fixed rate, unsecured 43,382 47,929 Total other borrowings 1,380,024 273,159 Subordinated Debentures Trust preferred securities, due 12/30/2033, floating rate of 2.80% above the three month LIBOR rate, reset quarterly, callable without penalty 20,620 20,620 Trust preferred securities, net of discount, due 6/30/2035, floating rate of 1.75% above the three month LIBOR rate, reset quarterly, callable without penalty 9,327 9,225 Trust preferred securities, net of discount, due 9/15/2037, floating rate of 1.37% above the three month LIBOR rate, reset quarterly 10,284 10,130 Trust preferred securities, net of discount, due 12/5/2033, floating rate of 2.88% above the three month LIBOR rate, reset quarterly, callable without penalty 5,156 5,161 Trust preferred securities, net of discount, due 10/18/2034, floating rate of 2.00% above the three month LIBOR rate, reset quarterly, callable without penalty 5,148 5,105 Trust preferred securities, net of discount, due 6/6/2037, floating rate of 1.57% above the three month LIBOR rate, reset quarterly, callable without penalty 10,288 10,156 Trust preferred securities, due 12/15/2035, floating rate of 1.45% above the three month LIBOR rate, reset quarterly, callable without penalty 6,702 -- Trust preferred securities, due 6/26/2033, floating rate of 3.10% above the three month LIBOR rate, reset quarterly, callable without penalty 20,619 -- Trust preferred securities, due 10/7/2033, floating rate of 2.85% above the three month LIBOR rate, reset quarterly, callable without penalty 25,774 -- Trust preferred securities, due 9/15/2037, floating rate of 2.00% above the three month LIBOR rate, reset quarterly, callable without penalty 8,248 -- Other subordinated debentures, net of discount, due 9/30/2023, floating rate equal to daily average of prime rate, reset quarterly 18,399 -- Total subordinated debentures 140,565 60,397 Total other borrowings and subordinated debentures $ 1,520,589 $ 333,556 In connection with the OKSB and First Texas acquisitions on October 19, 2017, $75.9 $6.7 May 15, 2017. In October 2017, may $75.0 October 5, 2018, During October 2015, $52.3 3.85% 10 5 October 2020. $36.0 2013 At December 31, 2017, $1.1 one The Company had total FHLB advances of $1.3 December 31, 2017, $2.258 $3.785 December 31, 2017. The trust preferred securities are tax-advantaged issues that qualified for Tier 1 December 31, 2017, $15 2 December 31, 2017. The Company’s long-term debt includes subordinated debt, notes payable and FHLB advances with an original maturity of greater than one December 31, 2017 Year (In thousands) 2018 $ 23,093 2019 7,486 2020 36,222 2021 2,165 2022 1,314 Thereafter 148,307 Total $ 218,587

Note 12 - Capital Stock

Note 12 - Capital Stock	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Capital Stock Disclosure [Text Block]	NOTE 12: CAPITAL STOCK On February 27, 2009, 40,040,000 $0.01 $80,000,000. On January 18, 2018, two one 100% January 30, 2018 ( February 9, 2018. two one On February 27, 2015, 30,852 1 1% February 18, 2016, 9%. January 29, 2016, On July 23, 2012, 850,000 5% no may not

Note 13 - Transactions With Rel

Note 13 - Transactions With Related Parties	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Related Party Transactions Disclosure [Text Block]	NOTE 13: TRANSACTIONS WITH RELATED PARTIES At December 31, 2017 2016, $58.9 2017 $65.8 2016. (In thousands) 2017 2016 Balance, beginning of year $ 65,834 $ 58,404 New extensions of credit 9,092 18,298 Repayments (16,059 ) (10,868 ) Balance, end of year $ 58,867 $ 65,834 In management's opinion, such loans and other extensions of credit and deposits (which were not not

Note 14 - Employee Benefit Plan

Note 14 - Employee Benefit Plans	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	NOTE 14: EMPLOYEE BENEFIT PLANS Retirement Plans The Company has a 401 December 31, 2016, 401 one $6,343,000, $5,488,000 $6,278,000 2017, 2016 2015, The Company also provides deferred compensation agreements with certain active and retired officers. The agreements provide monthly payments of retirement compensation for either stated periods or for the life of the participant. The charges to income for the plans were $1,596,000 2017, $1,056,000 2016 $804,000 2015. Employee Stock Purchase Plan The Company established an Employee Stock Purchase Plan in 2015 $25,000 95% 95% The special stock offering is available to substantially all non-highly compensated employees with at least six may $10,000 85% 85% Stock-Based Compensation Plans The Company’s Board of Directors has adopted various stock-based compensation plans. The plans provide for the grant of incentive stock options, nonqualified stock options, stock appreciation rights and bonus stock awards. Pursuant to the plans, shares are reserved for future issuance by the Company upon exercise of stock options or awarding of bonus shares granted to directors, officers and other key employees. Stock-based compensation expense for all stock-based compensation awards granted after January 1, 2006, may not not The fair value of each option award is estimated on the date of grant using the Black-Scholes option-pricing model that uses various assumptions. Expected volatility is based on historical volatility of the Company’s stock and other factors. The Company uses historical data to estimate option exercise and employee termination within the valuation model. The expected term of options granted is derived from the output of the option valuation model and represents the period of time that options granted are expected to be outstanding. The risk-free rate for periods within the contractual life of the option is based on the U.S. Treasury yield curve in effect at the time of grant. Forfeitures are estimated at the time of grant, and are based partially on historical experience. Share and per share information regarding Stock-Based Compensation Plans has been adjusted to reflect the effects of the Company’s two one February 8, 2018. December 31, 2017, 2016 2015, Stock Options Stock Awards Stock Units Number Weighted Number Weighted Number Weighted Balance, December 31, 2014 240 $ 13.86 454 $ 15.94 -- $ -- Granted 750 22.35 190 21.73 40 18.58 Stock Options Exercised (142 ) 11.29 -- -- -- -- Stock Options from Acquisitions 132 10.22 -- -- -- -- Stock Awards/Units Vested -- -- (262 ) 17.39 -- -- Forfeited/Expired (10 ) 12.25 (40 ) 17.68 -- -- Balance, December 31, 2015 970 20.31 342 17.83 40 18.58 Granted 116 23.51 272 23.46 216 23.48 Stock Options Exercised (128 ) 15.14 -- -- -- -- Stock Awards/Units Vested -- -- (318 ) 20.96 (25 ) 22.77 Forfeited/Expired (12 ) 17.53 (18 ) 21.85 (6 ) 23.51 Balance, December 31, 2016 946 21.43 278 20.48 225 22.70 Granted -- -- -- -- 849 28.86 Stock Options Exercised (122 ) 17.66 -- -- -- -- Stock Awards/Units Vested -- -- (91 ) 19.40 (392 ) 27.13 Forfeited/Expired (12 ) 22.67 (25 ) 21.91 (30 ) 25.76 Balance, December 31, 2017 812 $ 21.98 162 $ 20.86 652 $ 27.92 Exercisable, December 31, 2017 711 $ 21.85 The following table summarizes information about stock options under the plans outstanding at December 31, 2017: Options Outstanding Options Exercisable Range of Number Weighted Weighted Number Weighted $8.78 - $10.57 7 2.36 $ 9.64 7 $ 9.64 10.65 - 10.65 7 5.06 10.65 4 10.65 10.76 - 10.76 3 2.05 10.76 3 10.76 15.16 - 15.16 36 0.41 15.16 36 15.16 20.29 - 20.29 78 7.00 20.29 78 20.29 20.36 - 20.36 3 6.88 20.36 2 20.36 22.20 - 22.20 82 6.93 22.20 57 22.20 22.75 - 22.75 481 7.15 22.75 481 22.75 23.51 - 23.51 108 7.82 23.51 36 23.51 24.07 - 24.07 7 7.71 24.07 7 24.07 $8.78 - $24.07 812 6.83 $ 21.98 711 $ 21.85 Stock-based compensation expense was $11,763,000 2017, $5,451,000 2016 $4,018,000 2015. $264,000 December 31, 2017. $23.3 December 31, 2017. 2.3 The intrinsic value of stock options outstanding and stock options exercisable at December 31, 2017 $5,342,000 $4,761,000. $28.55 December 31, 2017, 122,012 2017, $1,329,000. 127,424 2016, $2,031,000. 142,736 2015, $2,054,000. The fair value of the Company’s employee stock options granted is estimated on the date of grant using the Black-Scholes option-pricing model. This model requires the input of highly subjective assumptions, changes to which can materially affect the fair value estimate. There were no December 31, 2017. December 31, 2016 $5.82 December 31, 2015 $3.91 December 31, 2016 2015 2016 2015 Expected dividend yield 1.96 % 2.06 % Expected stock price volatility 27.34 % 16.96 % Risk-free interest rate 2.01 % 2.17 % Expected life of options (in years) 7 10

Note 15 - Additional Cash Flow

Note 15 - Additional Cash Flow Information	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Cash Flow, Supplemental Disclosures [Text Block]	NOTE 15: ADDITIONAL CASH FLOW INFORMATION The following is a summary of the Company’s additional cash flow information during the years ended December 31: (In thousands) 2017 2016 2015 Interest paid $ 39,384 $ 22,069 $ 21,700 Income taxes paid 35,770 39,824 20,127 Transfers of loans not covered by FDIC loss share to foreclosed assets and other real estate owned 6,983 4,604 16,456 Transfers of loans acquired covered by FDIC loss share to foreclosed assets covered by FDIC loss share -- -- 4,349 Transfers of foreclosed assets covered by FDIC loss share to foreclosed assets and other real estate owned -- -- 13,895 Transfers of loans acquired covered by FDIC loss share to loans acquired not covered by FDIC loss share -- -- 88,922 Transfers of premises to foreclosed assets and other real estate owned 5,422 -- -- Transfers of premises held for sale to foreclosed assets and other real estate owned 3,188 652 6,126 In connection with the OKSB, First Texas, Hardeman, Citizens, Community First, Liberty, and Ozark Trust acquisitions, accounted for by using the purchase method, the Company acquired assets and assumed liabilities as follows: (In thousands) 2017 2016 2015 Assets acquired $ 5,582,495 $ 585,500 $ 2,996,228 Liabilities assumed 5,022,824 530,695 2,680,140 Purchase price 1,055,993 76,300 535,003 Goodwill $ 496,322 $ 21,495 $ 218,915

Note 16 - Other Operating Expen

Note 16 - Other Operating Expenses	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Other Income and Other Expense Disclosure [Text Block]	NOTE 16: OTHER OPERATING EXPENSES Other operating expenses consist of the following: (In thousands) 2017 2016 2015 Professional services $ 19,500 $ 14,630 $ 9,583 Postage 4,686 4,599 4,219 Telephone 4,262 4,294 4,817 Credit card expense 12,188 11,328 9,157 Marketing 11,141 6,929 6,337 Operating supplies 1,980 1,824 2,395 Amortization of intangibles 7,668 5,945 4,889 Branch right sizing expense 434 3,600 3,297 Other expense 27,020 20,364 20,001 Total other operating expenses $ 88,879 $ 73,513 $ 64,695 The Company had aggregate annual equipment rental expense of approximately $2.2 2017, $2.3 2016 $2.6 2015. $1,335,000, $1,338,000 $1,463,000 2017, 2016 2015, $5,580,000 2017, $4,643,000 2016 $4,216,000 2015.

Note 17 - Fair Value Measuremen

Note 17 - Fair Value Measurements	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Fair Value Disclosures [Text Block]	NOTE 17: FAIR VALUE MEASUREMENTS ASC Topic 820, Fair Value Measurements ASC Topic 820 820 three may · Level 1 · Level 2 1 not · Level 3 no In general, fair value is based upon quoted market prices, where available. If such quoted market prices are not may may may may not not may Following is a description of the inputs and valuation methodologies used for assets measured at fair value on a recurring basis and recognized in the accompanying consolidated balance sheets, as well as the general classification of such assets pursuant to the valuation hierarchy. Available-for-sale securities 1 1 2 may 820, 2 third 16 1 2 not 3 1 2 Assets held in trading accounts 2 Derivative instruments – 2 The following table sets forth the Company’s financial assets by level within the fair value hierarchy that were measured at fair value on a recurring basis as of December 31, 2017 2016. Fair Value Measurements (In thousands) Fair Value Quoted Prices in Significant Other Significant December 31, 2017 Available-for-sale securities U.S. Government agencies $ 139,724 $ -- $ 139,724 $ -- Mortgage-backed securities 1,187,317 -- 1,187,317 -- States and political subdivisions 143,165 -- 143,165 -- Other securities 119,311 -- 119,311 -- Other assets held for sale 165,780 -- -- 165,780 Derivative asset 3,634 -- 3,634 -- Other liabilities held for sale (157,366 ) -- -- (157,366 ) Derivative liability (3,068 ) -- (3,068 ) -- December 31, 2016 Available-for-sale securities U.S. Treasury $ 300 $ 300 $ -- $ -- U.S. Government agencies 137,771 -- 137,771 -- Mortgage-backed securities 868,324 -- 868,324 -- States and political subdivisions 102,943 -- 102,943 -- Other securities 48,016 -- 48,016 -- Assets held in trading accounts 41 -- 41 -- Derivative asset 1,199 -- 1,199 -- Derivative liability (1,274 ) -- (1,274 ) -- Certain financial assets and liabilities are measured at fair value on a nonrecurring basis; that is, the instruments are not Impaired loans (collateral dependent) not 3 Appraisals are updated at renewal, if not $1.5 one two may 1 3 310 Foreclosed assets and other real estate owned 3 December 31, 2017 2016, $32.1 $26.9 The significant unobservable inputs (Level 3 may 3 10% 40% Mortgage loans held for sale not may 2 3 3. December 31, 2017 2016, no The following table sets forth the Company’s financial assets by level within the fair value hierarchy that were measured at fair value on a nonrecurring basis as of December 31, 2017 2016. Fair Value Measurements Using (In thousands) Fair Value Quoted Prices in Significant Other Significant December 31, 2017 Impaired loans (1) (2) $ 11,229 $ -- $ -- $ 11,229 Foreclosed assets and other real estate owned (1) 24,093 -- -- 24,093 December 31, 2016 Impaired loans (1) (2) $ 17,154 $ -- $ -- $ 17,154 Foreclosed assets held for sale (1) 17,806 -- -- 17,806 ( 1 ( 2 $2,195,000 $2,384,000 December 31, 2017 2016, ASC Topic 825, Financial Instruments not not Cash and cash equivalents 1 Interest bearing balances due from banks 2 Held-to-maturity securities 1 not may 2 1 2 not 3 Loans 3 Loans acquired 3 Deposits 2 3 Federal Funds purchased, securities sold under agreement to repurchase and short-term debt 2 Other borrowings 2 Subordinated debentures 2 Accrued interest receivable/payable 2 Commitments to extend credit, letters of credit and lines of credit The fair value of a financial instrument is the current amount that would be exchanged between willing parties, other than in a forced liquidation. Fair value is best determined based upon quoted market prices. However, in many instances, there are no not may not The estimated fair values, and related carrying amounts, of the Company’s financial instruments are as follows: Carrying Fair Value Measurements (In thousands) Amount Level 1 Level 2 Level 3 Total December 31, 2017 Financial assets: Cash and cash equivalents $ 598,042 $ 598,042 $ -- $ -- $ 598,042 Interest bearing balances due from banks - time 3,314 -- 3,314 -- 3,314 Held-to-maturity securities 368,058 -- 373,298 -- 373,298 Mortgage loans held for sale 24,038 -- -- 24,038 24,038 Interest receivable 43,528 -- 43,528 -- 43,528 Legacy loans (net of allowance) 5,663,941 -- -- 5,646,505 5,646,505 Loans acquired (net of allowance) 5,074,076 -- -- 5,058,455 5,058,455 Financial liabilities: Non-interest bearing transaction accounts 2,665,249 -- 2,665,249 -- 2,665,249 Interest bearing transaction accounts and savings deposits 6,494,896 -- 6,494,896 -- 6,494,896 Time deposits 1,932,730 -- -- 1,915,539 1,915,539 Federal funds purchased and securities sold under agreements to repurchase 122,444 -- 122,444 -- 122,444 Other borrowings 1,380,024 -- 1,381,365 -- 1,381,365 Subordinated debentures 140,565 -- 136,474 -- 136,474 Interest payable 4,564 -- 4,564 -- 4,564 December 31, 2016 Financial assets Cash and cash equivalents $ 285,659 $ 285,659 $ -- $ -- $ 285,659 Interest bearing balances due from banks - time 4,563 -- 4,563 -- 4,563 Held-to-maturity securities 462,096 -- 465,960 -- 465,960 Mortgage loans held for sale 27,788 -- -- 27,788 27,788 Interest receivable 27,788 -- 27,788 -- 27,788 Legacy loans (net of allowance) 4,290,921 -- -- 4,305,165 4,305,165 Loans acquired (net of allowance) 1,305,683 -- -- 1,310,017 1,310,017 Financial liabilities: Non-interest bearing transaction accounts 1,491,676 -- 1,491,676 -- 1,491,676 Interest bearing transaction accounts and savings deposits 3,956,483 -- 3,956,483 -- 3,956,483 Time deposits 1,287,060 -- -- 1,278,339 1,278,339 Federal funds purchased and securities sold under agreements to repurchase 115,029 -- 115,029 -- 115,029 Other borrowings 273,159 -- 292,367 -- 292,367 Subordinated debentures 60,397 -- 55,318 -- 55,318 Interest payable 1,668 -- 1,668 -- 1,668 The fair value of commitments to extend credit, letters of credit and lines of credit is not

Note 18 - Commitments and Credi

Note 18 - Commitments and Credit Risk	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Commitments Disclosure [Text Block]	NOTE 18: COMMITMENTS AND CREDIT RISK The Company grants agri-business, commercial and residential loans to customers throughout Arkansas, Colorado, Kansas, Missouri, Oklahoma, Tennessee and Texas, along with credit card loans to customers throughout the United States. Commitments to extend credit are agreements to lend to a customer as long as there is no may may not may At December 31, 2017, $564,592,000 $3,086,696,000 December 31, 2016, $562,527,000 $1,220,137,000 Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third $47,621,000 $29,362,000 December 31, 2017 2016, 9 15 December 31, 2017 2016, no At December 31, 2017, not 5%

Note 19 - New Accounting Standa

Note 19 - New Accounting Standards	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Description of New Accounting Pronouncements Not yet Adopted [Text Block]	NOTE 19: NEW ACCOUNTING STANDARDS Recently Adopted Accounting Standards Reporting Comprehensive Income February 2018, No. 2018 02, Income Statement-Reporting Comprehensive Income (Topic 220 2018 02” 2017 2018 02 1 2 December 15, 2018, 2018 02 fourth 2017, $3.0 Premium Amortization on Purchased Callable Debt Securities March 2017, No. 2017 08, Receivables – Nonrefundable Fees and Other Costs (Topic 310 20 2017 08” not December 15, 2018, 2017 08 first 2017. not Employee Share-Based Payments March 2016, No. 2016 09, Compensation – Stock Compensation (Topic 718 2016 09” no 2016 09 2016 09 2016 09 December 15, 2016. not $1.7 December 31, 2017. Business Combinations: Pushdown Accounting September 2015, 2015 16 Business Combinations: Simplifying the Accounting for Measurement-Period Adjustments 2015 16” 2015 16 2015 16 2015 16 December 15, 2016 not Business Combinations: Pushdown Accounting May 2015, 2015 08 Business Combinations: Pushdown Accounting – Amendments to SEC Paragraphs Pursuant to Staff Accounting Bulletin No. 115 2015 08” 2015 08 5.J 805 50, 2015 08 not Consolidation Analysis February 2015, 2015 02, Consolidation (Topic 810 2015 02” 2015 02 810 2015 02 December 15, 2015. not Recently Issued Accounting Standards Derivatives and Hedging: Targeted Improvements August 2017, No. 2017 12, Derivatives and Hedging (Topic 815 2017 12” 1 2 3 4 5 December 15, 2018, not Stock Compensation: Scope of Modification Accounting May 2017, No. 2017 09, Compensation – Stock Compensation (Topic 718 2017 09” 1 2 718, may 2017 09 December 15, 2017, not 2017 09 not Goodwill Impairment January 2017, No. 2017 04, Intangibles – Goodwill and Other (Topic 350 2017 04” 2 not December 15, 2019, 2017. 2017 04 not Statement of Cash Flows August 2016, No. 2016 15, Statement of Cash Flows (Topic 230 2016 15” December 15, 2017, may no not Credit Losses on Financial Instruments June 2016, No. 2016 13, Financial Instruments – Credit Losses (Topic 326 2016 13” 2016 13 December 15, 2019, one first one Leases February 2016, No. 2016 02, Leases (Topic 842 2016 02” December 15, 2018, December 31, 2017, not Financial Assets and Financial Liabilities January 2016, No. 2016 01, Financial Instruments – Overall (Subtopic 825 10 2016 01” December 15, 2017, 2016 01 not not Revenue Recognition May 2014, No. 2014 09, Revenue from Contracts with Customers (Topic 606 2014 09” July 2015, No. 2015 14, December 15, 2017. not not 2015 14, not 2014 09 not not Presently, the Company is not

Note 20 - Contingent Liabilitie

Note 20 - Contingent Liabilities	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	NOTE 20: CONTINGENT LIABILITIES The Company and/or its subsidiaries have various unrelated legal proceedings, which, in the aggregate, are not

Note 21 - Stockholders' Equity

Note 21 - Stockholders' Equity	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Restrictions on Dividends, Loans and Advances [Text Block]	NOTE 21: STOCKHOLDERS’ EQUITY The Company’s subsidiary banks are subject to a legal limitations on dividends that can be paid to the parent company without prior approval of the applicable regulatory agencies. For the lead subsidiary bank, Simmons Bank, the approval of the Commissioner of the Arkansas State Bank Department is required if the total of all dividends declared by an Arkansas state bank in any calendar year exceeds seventy-five 75% seventy-five 75% December 31, 2017 December 31, 2017, $7.5 The Company’s subsidiary banks are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company must meet specific capital guidelines that involve quantitative measures of the Company’s assets, liabilities and certain off-balance-sheet items as calculated under regulatory accounting practices. The Company’s capital amounts and classifications are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. Furthermore, the Company’s regulators could require adjustments to regulatory capital not Effective January 1, 2015, July 2013 1 CET1 4.5% 1 2.5% CET1 January 1, 2016 0.625% January 1, 2019. Quantitative measures established by regulation to ensure capital adequacy require the Company to maintain minimum amounts and ratios (set forth in the table below) of total, Tier 1 1 1 December 31, 2017, As of the most recent notification from regulatory agencies, the bank subsidiaries were well capitalized under the regulatory framework for prompt corrective action. To be categorized as well capitalized, the Company and its subsidiary banks must maintain minimum total risk-based, Tier 1 1 1 no The Company’s and the subsidiary banks’ actual capital amounts and ratios are presented in the following table. Actual Minimum To Be Well (In thousands) Amount Ratio (%) Amount Ratio (%) Amount Ratio (%) As of December 31, 2017 Total Risk-Based Capital Ratio Simmons First National Corporation $ 1,388,970 11.4 $ 974,716 8.0 $ N/A Simmons Bank 877,728 12.1 580,316 8.0 725,395 10.0 Bank SNB 259,077 10.9 190,148 8.0 237,685 10.0 Southwest Bank 297,164 11.0 216,119 8.0 270,149 10.0 Tier 1 Risk-Based Capital Ratio Simmons First National Corporation 1,199,457 9.8 734,361 6.0 N/A Simmons Bank 835,787 11.5 436,063 6.0 581,417 8.0 Bank SNB 255,360 10.7 143,193 6.0 190,923 8.0 Southwest Bank 294,874 10.9 162,316 6.0 216,421 8.0 Common Equity Tier 1 Capital Ratio Simmons First National Corporation 1,199,457 9.8 550,771 4.5 N/A Simmons Bank 835,787 11.5 327,047 4.5 472,401 6.5 Bank SNB 255,360 10.7 107,394 4.5 155,125 6.5 Southwest Bank 294,874 10.9 121,737 4.5 175,842 6.5 Tier 1 Leverage Ratio Simmons First National Corporation 1,199,457 9.2 521,503 4.0 N/A Simmons Bank 835,787 9.2 363,386 4.0 454,232 5.0 Bank SNB 255,360 10.1 101,133 4.0 126,416 5.0 Southwest Bank 294,874 12.2 96,680 4.0 120,850 5.0 As of December 31, 2016 Total Risk-Based Capital Ratio Simmons First National Corporation $ 912,948 15.1 $ 483,681 8.0 $ N/A Simmons Bank 830,921 13.8 481,693 8.0 602,117 10.0 Tier 1 Risk-Based Capital Ratio Simmons First National Corporation 872,707 14.5 361,120 6.0 N/A Simmons Bank 790,673 13.2 359,397 6.0 479,196 8.0 Common Equity Tier 1 Capital Ratio Simmons First National Corporation 812,310 13.5 270,770 4.5 N/A Simmons Bank 790,673 13.2 269,548 4.5 389,347 6.5 Tier 1 Leverage Ratio Simmons First National Corporation 872,707 11.0 317,348 4.0 N/A Simmons Bank 790,673 10.0 316,269 4.0 395,337 5.0

Note 22 - Condensed Financial I

Note 22 - Condensed Financial Information (Parent Company Only)	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Condensed Financial Information of Parent Company Only Disclosure [Text Block]	NOTE 22: CONDENSED FINANCIAL INFORMATION (PARENT COMPANY ONLY) CONDENSED BALANCE SHEETS DECEMBER 31, 2017 2016 (In thousands) 2017 2016 ASSETS Cash and cash equivalents $ 19,101 $ 93,266 Investment securities 2,789 79 Investments in wholly-owned subsidiaries 2,288,687 1,141,294 Loans 993 1,083 Intangible assets, net 133 133 Premises and equipment 10,369 11,534 Other assets 31,181 27,955 TOTAL ASSETS $ 2,353,253 $ 1,275,344 LIABILITIES Short-term debt $ 75,000 $ -- Long-term debt 183,947 108,326 Other liabilities 9,742 15,907 Total liabilities 268,689 124,233 STOCKHOLDERS’ EQUITY Common stock 920 626 Surplus 1,586,034 711,663 Undivided profits 514,874 454,034 Accumulated other comprehensive loss Unrealized depreciation on available-for-sale securities, net of income taxes of ($6,108) and ($9,818) at December 31, 2017 and 2016 respectively (17,264 ) (15,212 ) Total stockholders’ equity 2,084,564 1,151,111 TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY $ 2,353,253 $ 1,275,344 CONDENSED STATEMENTS OF INCOME YEARS ENDED DECEMBER 31, 2017, 2016 2015 (In thousands) 2017 2016 2015 INCOME Dividends from subsidiaries $ 69,107 $ 83,710 $ 84,128 Other income 4,111 2,465 2,303 Income 73,218 86,175 86,431 EXPENSE 32,234 21,990 24,594 Income before income taxes and equity in undistributed net income of subsidiaries 40,984 64,185 61,837 Provision for income taxes (12,311 ) (7,557 ) (8,251 ) Income before equity in undistributed net income of subsidiaries 53,295 71,742 70,088 Equity in undistributed net income of subsidiaries 39,645 25,072 4,276 NET INCOME 92,940 96,814 74,364 Preferred stock dividends -- 24 257 NET INCOME AVAILABLE TO COMMON SHAREHOLDERS $ 92,940 $ 96,790 $ 74,107 CONDENSED STATEMENTS OF COMPREHENSIVE INCOME YEARS ENDED DECEMBER 31, 2017, 2016 2015 (In thousands) 2017 2016 2015 NET INCOME $ 92,940 $ 96,814 $ 74,364 OTHER COMPREHENSIVE INCOME Equity in other comprehensive income (loss) income of subsidiaries 964 (12,547 ) (1,329 ) COMPREHENSIVE INCOME $ 93,904 $ 84,267 $ 73,035 CONDENSED STATEMENTS OF CASH FLOWS YEARS ENDED DECEMBER 31, 2017, 2016 2015 (In thousands) 2017 2016 2015 CASH FLOWS FROM OPERATING ACTIVITIES Net income $ 92,940 $ 96,814 $ 74,364 Items not requiring (providing) cash Stock-based compensation expense 10,681 3,418 4,018 Depreciation and amortization 1,183 700 317 Deferred income taxes 1,190 (2,526 ) 1,287 Equity in undistributed net income of bank subsidiaries (39,645 ) (25,072 ) (4,276 ) Changes in Other assets 8,585 2,816 (15,232 ) Other liabilities (6,769 ) (1,358 ) 13,121 Net cash provided by operating activities 68,165 74,792 73,599 CASH FLOWS FROM INVESTING ACTIVITIES Net originations of loans 90 (1,710 ) -- Net purchases of premises and equipment (18 ) (6,896 ) 56 Additional investment in subsidiary (15,000 ) -- -- Proceeds from maturities of available-for-sale securities 42 1,973 -- Purchases of available-for-sale securities (2,752 ) (3 ) (354 ) Cash received (paid) in business combinations (100,468 ) (35,048 ) 44,173 Net cash (used in) provided by investing activities (118,106 ) (41,684 ) 43,875 CASH FLOWS FROM FINANCING ACTIVITIES Issuance (repayment) of long-term debt, net 8,014 (4,544 ) 8,126 Issuance of common stock, net 2,878 4,938 3,529 Dividends paid on preferred stock -- (24 ) (257 ) Dividends paid on common stock (35,116 ) (28,743 ) (27,026 ) Redemption of preferred stock -- (30,852 ) -- Net cash used in financing activities (24,224 ) (59,225 ) (15,628 ) (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS (74,165 ) (26,117 ) 101,846 CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR 93,266 119,383 17,537 CASH AND CASH EQUIVALENTS, END OF YEAR $ 19,101 $ 93,266 $ 119,383

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Nature of Operations and Principles of Consolidation Simmons First National Corporation (the “Company”) is primarily engaged in providing a full range of banking services to individual and corporate customers through its subsidiaries and their branch banks with offices. We are headquartered in Pine Bluff, Arkansas and conduct banking operations in communities throughout Arkansas, Colorado, Kansas, Missouri, Oklahoma, Tennessee and Texas. We offer consumer, real estate and commercial loans, checking, savings and time deposits from our 200 The consolidated financial statements include the accounts of Simmons First National Corporation and its subsidiaries, including Simmons Bank, Bank SNB and Southwest Bank. Significant intercompany accounts and transactions have been eliminated in consolidation.
Segment Reporting, Policy [Policy Text Block]	Operating Segments Operating segments are components of an enterprise about which separate financial information is available that is regularly evaluated by the chief operating decision maker in deciding how to allocate resources and in assessing performance. The Company is organized on a divisional basis. Each of the divisions provide a group of similar community banking services, including such products and services as loans; time deposits, checking and savings accounts; personal and corporate trust services; credit cards; investment management; insurance; and securities and investment services. Loan products include consumer, real estate, commercial, agricultural, equipment and SBA lending. The individual bank divisions have similar operating and economic characteristics. While the chief operating decision maker monitors the revenue streams of the various products, services, branch locations and divisions, operations are managed, financial performance is evaluated, and management makes decisions on how to allocate resources on a Company-wide basis. Accordingly, the divisions are considered by management to be aggregated into one The Company also considers its trust, investment and insurance services to be operating segments. Information on these segments is not not 280 10 50 12.
Use of Estimates, Policy [Policy Text Block]	Use of Estimates The preparation of financial statements, in accordance with accounting principles generally accepted in the United States (“US GAAP”), requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, income and expenses and disclosure of contingent assets and liabilities. The estimates and assumptions used in the accompanying consolidated financial statements are based upon management’s evaluation of the relevant facts and circumstances as of the date of the consolidated financial statements and actual results may Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan losses, the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans and the valuation of acquired loans and related indemnification asset. Management obtains independent appraisals for significant properties in connection with the determination of the allowance for loan losses and the valuation of foreclosed assets.
Reclassification, Policy [Policy Text Block]	Reclassifications Certain gains and fees were reclassified within non-interest income categories in the 2016 2017 not
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash Equivalents The Company considers all liquid investments with original maturities of three
Investment, Policy [Policy Text Block]	Investment Securities Held-to-maturity securities, which include any security for which the Company has the positive intent and ability to hold until maturity, are carried at historical cost adjusted for amortization of premiums and accretion of discounts. Premiums and discounts are amortized and accreted, respectively, to interest income using the constant yield method over the period to maturity. Available-for-sale securities, which include any security for which the Company has no may Trading securities, which include any security held primarily for near-term sale, are carried at fair value. Gains and losses on trading securities are included in other income. The Company applies accounting guidance related to recognition and presentation of other-than-temporary impairment under ASC Topic 320 10. not not, not As a result of this guidance, the Company’s consolidated statements of income reflect the full impairment (that is, the difference between the security’s amortized cost basis and fair value) on debt securities that the Company intends to sell or would more likely than not no not not not
Loans and Leases Receivable, Mortgage Banking Activities, Policy [Policy Text Block]	Mortgage Loans Held For Sale Mortgage loans held for sale are carried at the lower of cost or fair value, determined using an aggregate basis. Write-downs to fair value are recognized as a charge to earnings at the time the decline in value occurs. Forward commitments to sell mortgage loans are acquired to reduce market risk on mortgage loans in the process of origination and mortgage loans held for sale. The forward commitments acquired by the Company for mortgage loans in process of origination are not not not December 31, 2017 2016 not not
Finance, Loan and Lease Receivables, Held-for-investment, Policy [Policy Text Block]	Loans Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-offs are reported at their outstanding principal adjusted for any loans charged off, the allowance for loan losses and any unamortized deferred fees or costs on originated loans and unamortized premiums or discounts on purchased loans. For loans amortized at cost, interest income is accrued based on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, as well as premiums and discounts, are deferred and amortized as a level yield adjustment over the respective term of the loan. The accrual of interest on loans, except on certain government guaranteed loans, is discontinued at the time the loan is 90 Discounts and premiums on purchased residential real estate loans are amortized to income using the interest method over the remaining period to contractual maturity, adjusted for anticipated prepayments. Discounts and premiums on purchased consumer loans are recognized over the expected lives of the loans using methods that approximate the interest method. For discussion of the Company’s accounting for acquired loans, see Acquisition Accounting, Covered Loans and Related Indemnification Asset later in this section.
Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]	Allowance for Loan Losses The allowance for loan losses is management’s estimate of probable losses in the loan portfolio. Loan losses are charged against the allowance when management believes the uncollectability of a loan balance is confirmed. Subsequent recoveries, if any, are credited to the allowance. Allocations to the allowance for loan losses are categorized as either general reserves or specific reserves. The allowance for loan losses is calculated monthly based on management’s assessment of several factors such as ( 1 2 3 4 5 6 7 8 one four Specific reserves are provided on loans that are considered impaired when it is probable that we will not 90 not 90 Management’s evaluation of the allowance for loan losses is inherently subjective as it requires material estimates. The actual amounts of loan losses realized in the near term could differ from the amounts estimated in arriving at the allowance for loan losses reported in the financial statements.
Commitments and Contingencies, Policy [Policy Text Block]	Reserve for Unfunded Commitments In addition to the allowance for loan losses, the Company has established a reserve for unfunded commitments, classified in other liabilities. This reserve is maintained at a level sufficient to absorb losses arising from unfunded loan commitments. The adequacy of the reserve for unfunded commitments is determined monthly based on methodology similar to the Company’s methodology for determining the allowance for loan losses. Net adjustments to the reserve for unfunded commitments are included in other non-interest expense.
Business Combinations Policy [Policy Text Block]	Acquisition Accounting, Acquired Loans The Company accounts for its acquisitions under ASC Topic 805, Business Combinations No 820. The Company evaluates non-impaired loans acquired in accordance with the provisions of ASC Topic 310 20, Nonrefundable Fees and Other Costs 310 30, Loans and Debt Securities Acquired with Deteriorated Credit Quality not For impaired loans accounted for under ASC Topic 310 30,
Deteriorated Loans Transferred in, Policy [Policy Text Block]	Covered Loans and Related Indemnification Asset In September 2015, 2010 2012 four Under the terms of the agreement, the FDIC made a net payment of $2,368,000 one $7,476,000. For further discussion of our acquisition and loan accounting, see Note 2, 6,
Trust Assets Policy [Policy Text Block]	Trust Assets Trust assets (other than cash deposits) held by the Company in fiduciary or agency capacities for its customers are not not
Property, Plant and Equipment, Policy [Policy Text Block]	Premises and Equipment Depreciable assets are stated at cost less accumulated depreciation. Depreciation is charged to expense using the straight-line method over the estimated useful lives of the assets. Leasehold improvements are capitalized and amortized by the straight-line method over the terms of the respective leases or the estimated useful lives of the improvements, whichever is shorter.
Premises Held-for-sale, Policy [Policy Text Block]	Premises Held for Sale The Company records premises held for sale at the lower of ( 1 2
Real Estate Held for Development and Sale, Policy [Policy Text Block]	Foreclosed Assets Held For Sale Assets acquired by foreclosure or in settlement of debt and held for sale are valued at estimated fair value as of the date of foreclosure, and a related valuation allowance is provided for estimated costs to sell the assets. Management evaluates the value of foreclosed assets held for sale periodically and increases the valuation allowance for any subsequent declines in fair value. Changes in the valuation allowance are charged or credited to other expense.
Bank Owned Life Insurance [Policy Text Block]	Bank Owned Life Insurance The Company maintains bank-owned life insurance policies on certain current and former employees and directors, which are recorded at their cash surrender values as determined by the insurance carriers. The appreciation in the cash surrender value of the policies is recognized as a component of non-interest income in the Company’s consolidated statements of income.
Goodwill and Intangible Assets, Policy [Policy Text Block]	Goodwill and Intangible Assets Goodwill represents the excess of the cost of an acquisition over the fair value of the net assets acquired. Other intangible assets represent purchased assets that also lack physical substance but can be separately distinguished from goodwill because of contractual or other legal rights or because the asset is capable of being sold or exchanged either on its own or in combination with a related contract, asset or liability. The Company performs an annual goodwill impairment test, and more frequently if circumstances warrant, in accordance with ASC Topic 350, Intangibles – Goodwill and Other 350 may not
Derivatives, Policy [Policy Text Block]	Derivative Financial Instruments The Company may For derivatives designated as hedging the exposure to changes in the fair value of the hedged item, the gain or loss is recognized in earnings in the period of change together with the offsetting loss or gain of the hedging instrument. The fair value hedges are considered to be highly effective and any hedge ineffectiveness was deemed not The notional amount of the swaps was $303.5 December 31, 2017, $99.2 December 31, 2016.
Repurchase and Resale Agreements Policy [Policy Text Block]	Securities Sold Under Agreements to Repurchase The Company sells securities under agreements to repurchase to meet customer needs for sweep accounts. At the point funds deposited by customers become investable, those funds are used to purchase securities owned by the Company and held in its general account with the designation of Customers’ Securities. A third not
Investment Banking Fees, Policy [Policy Text Block]	Bankcard Fee Income Periodic bankcard fees, net of direct origination costs, are recognized as revenue on a straight-line basis over the period the fee entitles the cardholder to use the card.
Income Tax, Policy [Policy Text Block]	Income Taxes The Company accounts for income taxes in accordance with income tax accounting guidance in ASC Topic 740, Income Taxes two Deferred income tax expense results from changes in deferred tax assets and liabilities between periods. Deferred tax assets are recognized if it is more likely than not, not 50 not 50 not not not not The Company files consolidated income tax returns with its subsidiaries.
Earnings Per Share, Policy [Policy Text Block]	Earnings Per Share Basic earnings per share are computed based on the weighted average number of shares outstanding during each year. Diluted earnings per share are computed using the weighted average common shares and all potential dilutive common shares outstanding during the period. All share and per share amounts have been restated to reflect the effect of the two one February 2018. The computation of per share earnings is as follows: (In thousands, except per share data) 2017 2016 2015 Net income available to common shareholders $ 92,940 $ 96,790 $ 74,107 Average common shares outstanding 69,385 61,291 56,168 Average potential dilutive common shares 468 636 252 Average diluted common shares 69,853 61,927 56,420 Basic earnings per share $ 1.34 $ 1.58 $ 1.32 Diluted earnings per share $ 1.33 $ 1.56 $ 1.31 There were no December 31, 2017, 2016 2015.
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]	Stock-Based Compensation The Company has adopted various stock-based compensation plans. The plans provide for the grant of incentive stock options, nonqualified stock options, stock appreciation rights and bonus stock awards. Pursuant to the plans, shares are reserved for future issuance by the Company, upon exercise of stock options or awarding of bonus shares granted to directors, officers and other key employees. In accordance with ASC Topic 718, Compensation – Stock Compensation 14,

Note 1 - Summary of Significa32

Note 1 - Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	(In thousands, except per share data) 2017 2016 2015 Net income available to common shareholders $ 92,940 $ 96,790 $ 74,107 Average common shares outstanding 69,385 61,291 56,168 Average potential dilutive common shares 468 636 252 Average diluted common shares 69,853 61,927 56,420 Basic earnings per share $ 1.34 $ 1.58 $ 1.32 Diluted earnings per share $ 1.33 $ 1.56 $ 1.31

Note 2 - Acquisitions (Tables)

Note 2 - Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	(In thousands) Acquired from Fair Value Fair Assets Acquired Cash and due from banks $ 79,517 $ -- $ 79,517 Investment securities 485,468 (1,295 ) 484,173 Loans acquired 2,039,524 (43,071 ) 1,996,453 Allowance for loan losses (26,957 ) 26,957 -- Foreclosed assets 6,284 (1,127 ) 5,157 Premises and equipment 21,210 5,457 26,667 Bank owned life insurance 28,704 -- 28,704 Goodwill 13,545 (13,545 ) -- Core deposit intangible 1,933 40,191 42,124 Other intangibles 3,806 -- 3,806 Other assets 33,455 (8,929 ) 24,526 Total assets acquired $ 2,686,489 $ 4,638 $ 2,691,127 Liabilities Assumed Deposits: Non-interest bearing transaction accounts $ 485,971 $ -- $ 485,971 Interest bearing transaction accounts and savings deposits 869,252 -- 869,252 Time deposits 613,345 (2,213 ) 611,132 Total deposits 1,968,568 (2,213 ) 1,966,355 Securities sold under agreement to repurchase 11,256 -- 11,256 Other borrowings 347,000 -- 347,000 Subordinated debentures 46,393 -- 46,393 Accrued interest and other liabilities 17,440 5,364 22,804 Total liabilities assumed 2,390,657 3,151 2,393,808 Equity 295,832 (295,832 ) -- Total equity assumed 295,832 (295,832 ) -- Total liabilities and equity assumed $ 2,686,489 $ (292,681 ) $ 2,393,808 Net assets acquired 297,319 Purchase price 526,251 Goodwill $ 228,932 (In thousands) Acquired from Fair Value Fair Assets Acquired Cash and due from banks $ 59,277 $ -- $ 59,277 Investment securities 81,114 (596 ) 80,518 Loans acquired 2,246,212 (37,834 ) 2,208,378 Allowance for loan losses (20,864 ) 20,664 (200 ) Premises and equipment 24,864 10,123 34,987 Bank owned life insurance 7,190 -- 7,190 Goodwill 37,227 (37,227 ) -- Core deposit intangible -- 7,328 7,328 Other assets 18,263 12,703 30,966 Total assets acquired $ 2,453,283 $ (24,839 ) $ 2,428,444 Liabilities Assumed Deposits: Non-interest bearing transaction accounts $ 74,410 $ -- $ 74,410 Interest bearing transaction accounts and savings deposits 1,683,298 -- 1,683,298 Time deposits 124,233 (283 ) 123,950 Total deposits 1,881,941 (283 ) 1,881,658 Securities sold under agreement to repurchase 50,000 -- 50,000 Other borrowings 235,000 -- 235,000 Subordinated debentures 30,323 (811 ) 29,512 Accrued interest and other liabilities 11,727 1,463 13,190 Total liabilities assumed 2,208,991 369 2,209,360 Equity 244,292 (244,292 ) -- Total equity assumed 244,292 (244,292 ) -- Total liabilities and equity assumed $ 2,453,283 $ (243,923 ) $ 2,209,360 Net assets acquired 219,084 Purchase price 457,103 Goodwill $ 238,019 (In thousands) Acquired from Fair Value Fair Assets Acquired Cash and due from banks $ 8,001 $ -- $ 8,001 Interest bearing balances due from banks - time 1,984 -- 1,984 Investment securities 170,654 (285 ) 170,369 Loans acquired 257,641 (5,992 ) 251,649 Allowance for loan losses (2,382 ) 2,382 -- Foreclosed assets 1,083 (452 ) 631 Premises and equipment 9,905 1,258 11,163 Bank owned life insurance 7,819 -- 7,819 Goodwill 11,485 (11,485 ) -- Core deposit intangible -- 7,840 7,840 Other intangibles -- 830 830 Other assets 2,639 (1 ) 2,638 Total assets acquired $ 468,829 $ (5,905 ) $ 462,924 Liabilities Assumed Deposits: Non-interest bearing transaction accounts $ 76,555 $ -- $ 76,555 Interest bearing transaction accounts and savings deposits 214,872 -- 214,872 Time deposits 97,917 (368 ) 97,549 Total deposits 389,344 (368 ) 388,976 Securities sold under agreement to repurchase 17,163 -- 17,163 Other borrowings 3,000 -- 3,000 Subordinated debentures 6,702 -- 6,702 Accrued interest and other liabilities 1,891 1,924 3,815 Total liabilities assumed 418,100 1,556 419,656 Equity 50,729 (50,729 ) -- Total equity assumed 50,729 (50,729 ) -- Total liabilities and equity assumed $ 468,829 $ (49,173 ) $ 419,656 Net assets acquired 43,268 Purchase price 72,639 Goodwill $ 29,371 (In thousands) Acquired from Fair Value Fair Assets Acquired Cash and due from banks $ 131,467 $ (351 ) $ 131,116 Federal funds sold 10,000 -- 10,000 Investment securities 61,987 1 61,988 Loans acquired 350,361 (9,511 ) 340,850 Allowance for loan losses (4,313 ) 4,313 -- Foreclosed assets 4,960 (1,518 ) 3,442 Premises and equipment 6,746 1,339 8,085 Bank owned life insurance 6,632 -- 6,632 Core deposit intangible -- 5,075 5,075 Other intangibles -- 591 591 Other assets 17,364 6 17,370 Total assets acquired $ 585,204 $ (55 ) $ 585,149 Liabilities Assumed Deposits: Non-interest bearing transaction accounts $ 109,281 $ -- $ 109,281 Interest bearing transaction accounts and savings deposits 204,912 -- 204,912 Time deposits 195,664 -- 195,664 Total deposits 509,857 -- 509,857 Securities sold under agreement to repurchase 13,233 -- 13,233 FHLB borrowings 4,000 47 4,047 Accrued interest and other liabilities 3,558 1,530 5,088 Total liabilities assumed 530,648 1,577 532,225 Equity 54,556 (54,556 ) -- Total equity assumed 54,556 (54,556 ) -- Total liabilities and equity assumed $ 585,204 $ (52,979 ) $ 532,225 Net assets acquired 52,924 Purchase price 76,300 Goodwill $ 23,376 (In thousands) Acquired from Fair Value Fair Assets Acquired Cash and due from banks, including time deposits $ 102,637 $ (14 ) $ 102,623 Federal funds sold 7,060 -- 7,060 Investment securities 99,123 (335 ) 98,788 Loans acquired, not covered by FDIC loss share 790,493 (9,835 ) 780,658 Allowance for loan losses (10,422 ) 10,422 -- Premises and equipment 34,239 (3,215 ) 31,024 Bank owned life insurance 16,972 -- 16,972 Core deposit intangible 699 13,857 14,556 Other intangibles 3,063 (3,063 ) -- Other assets 17,703 (3,112 ) 14,591 Total assets acquired $ 1,061,567 $ 4,705 $ 1,066,272 Liabilities Assumed Deposits: Non-interest bearing transaction accounts $ 146,618 $ -- $ 146,618 Interest bearing transaction accounts and savings deposits 543,183 -- 543,183 Time deposits 184,913 -- 184,913 Total deposits 874,714 -- 874,714 FHLB borrowings 46,128 223 46,351 Subordinated debentures 20,620 (510 ) 20,110 Accrued interest and other liabilities 7,828 300 8,128 Total liabilities assumed 949,290 13 949,303 Equity 112,277 (112,277 ) -- Total equity assumed 112,277 (112,277 ) -- Total liabilities and equity assumed $ 1,061,567 $ (112,264 ) $ 949,303 Net assets acquired 116,969 Purchase price 212,176 Goodwill $ 95,207 (In thousands) Acquired from Fair Value Fair Assets Acquired Cash and due from banks $ 39,848 $ -- $ 39,848 Federal funds sold 76,508 -- 76,508 Investment securities 570,199 (3,381 ) 566,818 Loans acquired, not covered by FDIC loss share 1,163,398 (26,855 ) 1,136,543 Allowance for loan losses (14,635 ) 14,635 -- Foreclosed assets not covered by FDIC loss share 747 -- 747 Premises and equipment 44,837 (2,794 ) 42,043 Bank owned life insurance 22,149 -- 22,149 Goodwill 100 (100 ) -- Core deposit intangible -- 11,273 11,273 Other intangibles -- 420 420 Deferred tax asset 3,700 3,538 7,238 Other assets 11,474 -- 11,474 Total assets acquired $ 1,918,325 $ (3,264 ) $ 1,915,061 Liabilities Assumed Deposits: Non-interest bearing transaction accounts $ 103,825 $ -- $ 103,825 Interest bearing transaction accounts and savings deposits 995,207 -- 995,207 Time deposits 436,181 849 437,030 Total deposits 1,535,213 849 1,536,062 Federal funds purchased and securities sold under agreement to repurchase 16,230 -- 16,230 FHLB borrowings 143,047 674 143,721 Subordinated debentures 21,754 (840 ) 20,914 Accrued interest and other liabilities 8,769 601 9,370 Total liabilities assumed 1,725,013 1,284 1,726,297 Equity 193,312 (193,312 ) -- Total equity assumed 193,312 (193,312 ) -- Total liabilities and equity assumed $ 1,918,325 $ (192,028 ) $ 1,726,297 Net assets acquired 188,764 Purchase price 299,204 Goodwill $ 110,440 (In thousands) Acquired from Fair Value Fair Assets Acquired Cash $ 1,756 $ -- $ 1,756 Investment securities 241 -- 241 Premises and equipment 1,126 418 1,544 Other intangibles -- 9,733 9,733 Other assets 752 869 1,621 Total assets acquired $ 3,875 $ 11,020 $ 14,895 Liabilities Assumed Deferred tax liability 63 4,175 4,238 Accrued and other liabilities 302 -- 302 Total liabilities assumed 365 4,175 4,540 Equity 3,510 (3,510 ) -- Total equity assumed 3,510 (3,510 ) -- Total liabilities and equity assumed $ 3,875 $ 665 $ 4,540 Net assets acquired 10,355 Purchase price 23,623 Goodwill $ 13,268
Business Acquisition, Pro Forma Information [Table Text Block]	(In thousands, except per share data) 2017 2016 Revenue (1) $ 654,358 $ 620,461 Net income $ 130,947 $ 136,199 Diluted earnings per share $ 1.43 $ 1.52

Note 3 - Investment Securities

Note 3 - Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Investment [Table Text Block]	Years Ended December 31 2017 2016 (In thousands) Amortized Gross Gross Estimated Amortized Gross Gross Estimated Held-to-Maturity U.S. Government agencies $ 46,945 $ 7 $ (228 ) $ 46,724 $ 76,875 $ 107 $ (182 ) $ 76,800 Mortgage-backed securities 16,132 8 (287 ) 15,853 19,773 63 (249 ) 19,587 State and political subdivisions 301,491 5,962 (222 ) 307,231 362,532 4,967 (842 ) 366,657 Other securities 3,490 -- -- 3,490 2,916 -- -- 2,916 Total HTM $ 368,058 $ 5,977 $ (737 ) $ 373,298 $ 462,096 $ 5,137 $ (1,273 ) $ 465,960 Available-for-Sale U.S. Treasury $ -- $ -- $ -- $ -- $ 300 $ -- $ -- $ 300 U.S. Government agencies 141,559 116 (1,951 ) 139,724 140,005 67 (2,301 ) 137,771 Mortgage-backed securities 1,208,017 246 (20,946 ) 1,187,317 885,783 178 (17,637 ) 868,324 State and political subdivisions 144,642 532 (2,009 ) 143,165 108,374 38 (5,469 ) 102,943 Other securities 118,106 1,206 (1 ) 119,311 47,022 996 (2 ) 48,016 Total AFS $ 1,612,324 $ 2,100 $ (24,907 ) $ 1,589,517 $ 1,181,484 $ 1,279 $ (25,409 ) $ 1,157,354
Schedule of Unrealized Loss on Investments [Table Text Block]	Less Than 12 Months 12 Months or More Total (In thousands) Estimated Gross Estimated Gross Estimated Gross December 31, 2017 Held-to-Maturity U.S. Government agencies $ 11,961 $ 6 $ 32,778 $ 222 $ 44,739 $ 228 Mortgage-backed securities 5,471 47 8,946 240 14,417 287 State and political subdivisions 40,299 198 1,887 24 42,186 222 Total HTM $ 57,731 $ 251 $ 43,611 $ 486 $ 101,342 $ 737 Available-for-Sale U.S. Government agencies $ 91,988 $ 921 $ 25,742 $ 1,030 $ 117,730 $ 1,951 Mortgage-backed securities 510,770 4,516 609,329 16,430 1,120,099 20,946 State and political subdivisions 25,049 202 75,404 1,807 100,453 2,009 Other securities -- -- 99 1 99 1 Total AFS $ 627,807 $ 5,639 $ 710,574 $ 19,268 $ 1,338,381 $ 24,907 December 31, 2016 Held-to-Maturity U.S. Government agencies $ 32,859 $ 141 $ 19,959 $ 41 $ 52,818 $ 182 Mortgage-backed securities 11,833 205 1,465 44 13,298 249 State and political subdivisions 104,974 841 330 1 105,304 842 Total HTM $ 149,666 $ 1,187 $ 21,754 $ 86 $ 171,420 $ 1,273 Available-for-Sale U.S. Government agencies $ 126,325 $ 2,301 $ -- $ -- $ 126,325 $ 2,301 Mortgage-backed securities 833,393 17,637 -- -- 833,393 17,637 State and political subdivisions 94,922 5,469 -- -- 94,922 5,469 Other securities 99 2 -- -- 99 2 Total AFS $ 1,054,739 $ 25,409 $ -- $ -- $ 1,054,739 $ 25,409
Investment Income [Table Text Block]	(In thousands) 2017 2016 2015 Taxable Held-to-maturity $ 2,521 $ 3,778 $ 5,162 Available-for-sale 25,996 17,928 12,129 Non-taxable Held-to-maturity 8,693 10,641 11,635 Available-for-sale 2,905 1,132 1,687 Total $ 40,115 $ 33,479 $ 30,613
Investments Classified by Contractual Maturity Date [Table Text Block]	Held-to-Maturity Available-for-Sale (In thousands) Amortized Fair Amortized Fair Value One year or less $ 46,377 $ 46,255 $ 590 $ 591 After one through five years 85,451 85,581 35,616 35,246 After five through ten years 92,361 93,400 24,203 23,953 After ten years 127,737 132,209 225,892 223,198 Securities not due on a single maturity date 16,132 15,853 1,208,017 1,187,317 Other securities (no maturity) -- -- 118,006 119,212 Total $ 368,058 $ 373,298 $ 1,612,324 $ 1,589,517

Note 5 - Loans and Allowance 35

Note 5 - Loans and Allowance for Loan Losses (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	(In thousands) 2017 2016 Consumer: Credit cards $ 185,422 $ 184,591 Other consumer 280,094 303,972 Total consumer 465,516 488,563 Real estate: Construction 614,155 336,759 Single family residential 1,094,633 904,245 Other commercial 2,530,824 1,787,075 Total real estate 4,239,612 3,028,079 Commercial: Commercial 825,217 639,525 Agricultural 148,302 150,378 Total commercial 973,519 789,903 Other 26,962 20,662 Loans 5,705,609 4,327,207 Loans acquired, net of discount and allowance (1) 5,074,076 1,305,683 Total loans $ 10,779,685 $ 5,632,890
Schedule of Financing Receivables, Non Accrual Status [Table Text Block]	(In thousands) 2017 2016 Consumer: Credit cards $ 170 $ 373 Other consumer 4,605 1,793 Total consumer 4,775 2,166 Real estate: Construction 2,242 3,411 Single family residential 13,431 12,139 Other commercial 16,054 12,385 Total real estate 31,727 27,935 Commercial: Commercial 6,980 7,765 Agricultural 2,160 1,238 Total commercial 9,140 9,003 Total $ 45,642 $ 39,104
Past Due Financing Receivables [Table Text Block]	(In thousands) Gross 90 Days Total Current Total 90 Days December 31, 2017 Consumer: Credit cards $ 707 $ 672 $ 1,379 $ 184,043 $ 185,422 $ 332 Other consumer 5,009 3,298 8,307 271,787 280,094 10 Total consumer 5,716 3,970 9,686 455,830 465,516 342 Real estate: Construction 411 1,210 1,621 612,534 614,155 -- Single family residential 8,071 6,460 14,531 1,080,102 1,094,633 1 Other commercial 2,388 8,031 10,419 2,520,405 2,530,824 -- Total real estate 10,870 15,701 26,571 4,213,041 4,239,612 1 Commercial: Commercial 1,523 6,125 7,648 817,569 825,217 -- Agricultural 50 2,120 2,170 146,132 148,302 Total commercial 1,573 8,245 9,818 963,701 973,519 -- Other -- -- -- 26,962 26,962 -- Total $ 18,159 $ 27,916 $ 46,075 $ 5,659,534 $ 5,705,609 $ 343 December 31, 2016 Consumer: Credit cards $ 716 $ 275 $ 991 $ 183,600 $ 184,591 $ 275 Other consumer 3,786 1,027 4,813 299,159 303,972 11 Total consumer 4,502 1,302 5,804 482,759 488,563 286 Real estate: Construction 1,420 1,246 2,666 334,093 336,759 -- Single family residential 6,310 5,927 12,237 892,008 904,245 14 Other commercial 4,212 6,722 10,934 1,776,141 1,787,075 -- Total real estate 11,942 13,895 25,837 3,002,242 3,028,079 14 Commercial: Commercial 2,040 5,296 7,336 632,189 639,525 -- Agricultural 121 1,215 1,336 149,042 150,378 -- Total commercial 2,161 6,511 8,672 781,231 789,903 -- Other -- -- -- 20,662 20,662 -- Total $ 18,605 $ 21,708 $ 40,313 $ 4,286,894 $ 4,327,207 $ 300
Impaired Financing Receivables [Table Text Block]	(In thousands) Unpaid Recorded Recorded Total Related Average Interest December 31, 2017 Consumer: Credit cards $ 170 $ 170 $ -- $ 170 $ -- $ 268 $ 47 Other consumer 4,755 4,605 -- 4,605 -- 3,089 106 Total consumer 4,925 4,775 -- 4,775 -- 3,357 153 Real estate: Construction 2,522 1,347 895 2,242 249 2,711 93 Single family residential 14,347 12,725 706 13,431 53 12,904 443 Other commercial 22,308 6,732 9,133 15,865 36 18,624 639 Total real estate 39,177 20,804 10,734 31,538 338 34,239 1,175 Commercial: Commercial 9,954 4,306 2,269 6,575 -- 11,670 400 Agricultural 3,278 1,035 -- 1,035 -- 1,522 52 Total commercial 13,232 5,341 2,269 7,610 -- 13,192 452 Total $ 57,334 $ 30,920 $ 13,003 $ 43,923 $ 338 $ 50,788 $ 1,780 December 31, 2016 Consumer: Credit cards $ 373 $ 373 $ -- $ 373 $ -- $ 346 $ 20 Other consumer 1,836 1,797 3 1,800 1 1,066 47 Total consumer 2,209 2,170 3 2,173 1 1,412 67 Real estate: Construction 4,275 1,038 2,374 3,412 156 4,436 196 Single family residential 12,970 10,630 1,753 12,383 162 9,486 419 Other commercial 20,993 6,891 7,315 14,206 99 14,932 659 Total real estate 38,238 18,559 11,442 30,001 417 28,854 1,274 Commercial: Commercial 11,848 2,734 7,573 10,307 262 4,666 206 Agricultural 2,226 1,215 -- 1,215 -- 1,046 46 Total commercial 14,074 3,949 7,573 11,522 262 5,712 252 Total $ 54,521 $ 24,678 $ 19,018 $ 43,696 $ 680 $ 35,978 $ 1,593
Troubled Debt Restructurings on Financing Receivables [Table Text Block]	Accruing TDR Loans Nonaccrual TDR Loans Total TDR Loans (Dollars in thousands) Number Balance Number Balance Number Balance December 31, 2017 Real estate: Construction -- $ -- $ 1 $ 420 $ 1 $ 420 Single-family residential 4 141 15 954 19 1,095 Other commercial 4 4,322 5 3,712 9 8,034 Total real estate 8 4,463 21 5,086 29 9,549 Commercial: Commercial 5 2,644 6 745 11 3,389 Total commercial 5 2,644 6 745 11 3,389 Total 13 $ 7,107 27 $ 5,831 40 $ 12,938 December 31, 2016 Consumer: Other consumer -- $ -- 1 $ 3 1 $ 3 Total consumer -- -- 1 3 1 3 Real estate: Construction -- -- 1 18 1 18 Single-family residential 3 167 29 2,078 32 2,245 Other commercial 23 9,048 2 780 25 9,828 Total real estate 26 9,215 32 2,876 58 12,091 Commercial: Commercial 15 1,783 5 297 20 2,080 Total commercial 15 1,783 5 297 20 2,080 Total 41 $ 10,998 38 $ 3,176 79 $ 14,174
Schedule of Loans Restructured as TDRs [Table Text Block]	Modification Type (Dollars in thousands) Number of Balance Prior Balance at Change in Change in Financial Impact Year Ended December 31, 2017 Real estate: Construction 1 $ 456 $ 456 $ 456 $ -- $ -- Single-family residential 1 139 130 130 -- -- Other commercial 3 7,715 7,715 7,715 -- 33 Total real estate 5 8,310 8,301 8,301 -- 33 Commercial: Commercial 11 2,691 2,604 2,565 39 -- Total commercial 11 2,691 2,604 2,565 39 -- Total 16 $ 11,001 $ 10,905 $ 10,866 $ 39 $ 33 Year Ended December 31, 2016 Consumer: Other consumer 2 $ 50 $ 11 $ 11 $ -- $ -- Total consumer 2 50 11 11 -- -- Real estate: Single-family residential 23 1,570 1,518 964 554 -- Other commercial 28 10,291 10,260 9,128 1,132 -- Total real estate 51 11,861 11,778 10,092 1,686 -- Commercial: Commercial 17 1,996 1,968 1,968 -- -- Total commercial 17 1,996 1,968 1,968 -- -- Total 70 $ 13,907 $ 13,757 $ 12,071 $ 1,686 $ --
Financing Receivable Credit Quality Indicators [Table Text Block]	(In thousands) Risk Rate Risk Rate Risk Rate Risk Rate Risk Rate Total December 31, 2017 Consumer: Credit cards $ 184,920 $ -- $ 502 $ -- $ -- $ 185,422 Other consumer 275,160 -- 4,934 -- -- 280,094 Total consumer 460,080 -- 5,436 -- -- 465,516 Real estate: Construction 603,126 5,795 5,218 16 -- 614,155 Single family residential 1,066,902 3,954 23,490 287 -- 1,094,633 Other commercial 2,480,293 19,581 30,950 -- -- 2,530,824 Total real estate 4,150,321 29,330 59,658 303 -- 4,239,612 Commercial: Commercial 736,377 74,254 14,402 50 134 825,217 Agricultural 146,065 24 2,190 23 -- 148,302 Total commercial 882,442 74,278 16,592 73 134 973,519 Other 26,962 -- -- -- -- 26,962 Loans acquired 4,782,384 198,314 93,378 -- -- 5,074,076 Total $ 10,302,189 $ 301,922 $ 175,064 $ 376 $ 134 $ 10,779,685 (In thousands) Risk Rate Risk Rate Risk Rate Risk Rate Risk Rate Total December 31, 2016 Consumer: Credit cards $ 183,943 $ -- $ 648 $ -- $ -- $ 184,591 Other consumer 301,632 26 2,314 -- -- 303,972 Total consumer 485,575 26 2,962 -- -- 488,563 Real estate: Construction 330,080 98 6,565 16 -- 336,759 Single family residential 875,603 4,024 24,460 158 -- 904,245 Other commercial 1,738,207 6,874 41,994 -- -- 1,787,075 Total real estate 2,943,890 10,996 73,019 174 -- 3,028,079 Commercial: Commercial 616,805 558 22,162 -- -- 639,525 Agricultural 148,218 104 2,033 -- 23 150,378 Total commercial 765,023 662 24,195 -- 23 789,903 Other 20,662 -- -- -- -- 20,662 Loans acquired 1,217,886 22,181 64,075 1,541 -- 1,305,683 Total $ 5,433,036 $ 33,865 $ 164,251 $ 1,715 $ 23 $ 5,632,890
Schedule of Net (charge-offs)/recoveries, excluding loans acquired [Table Text Block]	(In thousands) 2017 2016 Consumer: Credit cards $ (2,884 ) $ (2,288 ) Other consumer (1,528 ) (1,459 ) Total consumer (4,412 ) (3,747 ) Real estate: Construction 100 (16 ) Single family residential (1,045 ) (706 ) Other commercial (6,054 ) (6,444 ) Total real estate (6,999 ) (7,166 ) Commercial: Commercial (7,734 ) (1,255 ) Agricultural -- (2,336 ) Total commercial (7,734 ) (3,591 ) Total $ (19,145 ) $ (14,504 )
Allowance for Credit Losses on Financing Receivables [Table Text Block]	(In thousands) Commercial Real Credit Other Total December 31, 2017 Balance, beginning of year (2) $ 7,739 $ 21,817 $ 3,779 $ 2,951 $ 36,286 Provision for loan losses (1) 7,002 12,463 2,889 2,173 24,527 Charge-offs (7,837 ) (7,989 ) (3,905 ) (3,767 ) (23,498 ) Recoveries 103 990 1,021 2,239 4,353 Net charge-offs (7,734 ) (6,999 ) (2,884 ) (1,528 ) (19,145 ) Balance, end of year (2) $ 7,007 $ 27,281 $ 3,784 $ 3,596 $ 41,668 Period-end amount allocated to: Loans individually evaluated for impairment $ -- $ 338 $ -- $ -- $ 338 Loans collectively evaluated for impairment 7,007 26,943 3,784 3,596 41,330 Balance, end of year (2) $ 7,007 $ 27,281 $ 3,784 $ 3,596 $ 41,668 December 31, 2016 Balance, beginning of year (2) $ 5,985 $ 19,522 $ 3,893 $ 1,951 $ 31,351 Provision for loan losses (1) 5,345 9,461 2,174 2,459 19,439 Charge-offs (3,956 ) (7,517 ) (3,195 ) (1,975 ) (16,643 ) Recoveries 365 351 907 516 2,139 Net charge-offs (3,591 ) (7,166 ) (2,288 ) (1,459 ) (14,504 ) Balance, end of year (2) $ 7,739 $ 21,817 $ 3,779 $ 2,951 $ 36,286 Period-end amount allocated to: Loans individually evaluated for impairment $ 262 $ 417 $ -- $ 1 $ 680 Loans collectively evaluated for impairment 7,477 21,400 3,779 2,950 35,606 Balance, end of year (2) $ 7,739 $ 21,817 $ 3,779 $ 2,951 $ 36,286 (In thousands) Commercial Real Credit Other Total December 31, 2015 Balance, beginning of year $ 6,962 $ 15,161 $ 5,445 $ 1,460 $ 29,028 Provision for loan losses 258 5,738 665 1,625 8,286 Charge-offs (1,415 ) (1,580 ) (3,107 ) (1,672 ) (7,774 ) Recoveries 180 203 890 538 1,811 Net charge-offs (1,235 ) (1,377 ) (2,217 ) (1,134 ) (5,963 ) Balance, end of year $ 5,985 $ 19,522 $ 3,893 $ 1,951 $ 31,351
Schedule of Loans by impairment evaluation [Table Text Block]	(In thousands) Commercial Real Credit Other Total December 31, 2017 Loans individually evaluated for impairment $ 7,610 $ 31,538 $ 170 $ 4,605 $ 43,923 Loans collectively evaluated for impairment 965,909 4,208,074 185,252 302,451 5,661,686 Balance, end of period $ 973,519 $ 4,239,612 $ 185,422 $ 307,056 $ 5,705,609 December 31, 2016 Loans individually evaluated for impairment $ 11,522 $ 30,001 $ 373 $ 1,800 $ 43,696 Loans collectively evaluated for impairment 778,381 2,998,078 184,218 322,834 4,283,511 Balance, end of period $ 789,903 $ 3,028,079 $ 184,591 $ 324,634 $ 4,327,207

Note 6 - Loans Acquired (Tables

Note 6 - Loans Acquired (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Carrying Value Of All Acquired Impaired Loans [Table Text Block]	Loans Acquired (In thousands) 2017 2016 Consumer: Other consumer $ 51,467 $ 49,677 Total consumer 51,467 49,677 Real estate: Construction 637,032 57,587 Single family residential 793,228 423,176 Other commercial 2,387,777 690,108 Total real estate 3,818,037 1,170,871 Commercial: Commercial 995,587 81,837 Agricultural 66,576 3,298 Total commercial 1,062,163 85,135 Other 142,409 -- Total loans acquired (1) $ 5,074,076 $ 1,305,683
Schedule of Financing Receivables, Non Accrual Status [Table Text Block]	(In thousands) 2017 2016 Consumer: Credit cards $ 170 $ 373 Other consumer 4,605 1,793 Total consumer 4,775 2,166 Real estate: Construction 2,242 3,411 Single family residential 13,431 12,139 Other commercial 16,054 12,385 Total real estate 31,727 27,935 Commercial: Commercial 6,980 7,765 Agricultural 2,160 1,238 Total commercial 9,140 9,003 Total $ 45,642 $ 39,104
Past Due Financing Receivables [Table Text Block]	(In thousands) Gross 90 Days Total Current Total 90 Days December 31, 2017 Consumer: Credit cards $ 707 $ 672 $ 1,379 $ 184,043 $ 185,422 $ 332 Other consumer 5,009 3,298 8,307 271,787 280,094 10 Total consumer 5,716 3,970 9,686 455,830 465,516 342 Real estate: Construction 411 1,210 1,621 612,534 614,155 -- Single family residential 8,071 6,460 14,531 1,080,102 1,094,633 1 Other commercial 2,388 8,031 10,419 2,520,405 2,530,824 -- Total real estate 10,870 15,701 26,571 4,213,041 4,239,612 1 Commercial: Commercial 1,523 6,125 7,648 817,569 825,217 -- Agricultural 50 2,120 2,170 146,132 148,302 Total commercial 1,573 8,245 9,818 963,701 973,519 -- Other -- -- -- 26,962 26,962 -- Total $ 18,159 $ 27,916 $ 46,075 $ 5,659,534 $ 5,705,609 $ 343 December 31, 2016 Consumer: Credit cards $ 716 $ 275 $ 991 $ 183,600 $ 184,591 $ 275 Other consumer 3,786 1,027 4,813 299,159 303,972 11 Total consumer 4,502 1,302 5,804 482,759 488,563 286 Real estate: Construction 1,420 1,246 2,666 334,093 336,759 -- Single family residential 6,310 5,927 12,237 892,008 904,245 14 Other commercial 4,212 6,722 10,934 1,776,141 1,787,075 -- Total real estate 11,942 13,895 25,837 3,002,242 3,028,079 14 Commercial: Commercial 2,040 5,296 7,336 632,189 639,525 -- Agricultural 121 1,215 1,336 149,042 150,378 -- Total commercial 2,161 6,511 8,672 781,231 789,903 -- Other -- -- -- 20,662 20,662 -- Total $ 18,605 $ 21,708 $ 40,313 $ 4,286,894 $ 4,327,207 $ 300
Financing Receivable Credit Quality Indicators [Table Text Block]	(In thousands) Risk Rate Risk Rate Risk Rate Risk Rate Risk Rate Total December 31, 2017 Consumer: Credit cards $ 184,920 $ -- $ 502 $ -- $ -- $ 185,422 Other consumer 275,160 -- 4,934 -- -- 280,094 Total consumer 460,080 -- 5,436 -- -- 465,516 Real estate: Construction 603,126 5,795 5,218 16 -- 614,155 Single family residential 1,066,902 3,954 23,490 287 -- 1,094,633 Other commercial 2,480,293 19,581 30,950 -- -- 2,530,824 Total real estate 4,150,321 29,330 59,658 303 -- 4,239,612 Commercial: Commercial 736,377 74,254 14,402 50 134 825,217 Agricultural 146,065 24 2,190 23 -- 148,302 Total commercial 882,442 74,278 16,592 73 134 973,519 Other 26,962 -- -- -- -- 26,962 Loans acquired 4,782,384 198,314 93,378 -- -- 5,074,076 Total $ 10,302,189 $ 301,922 $ 175,064 $ 376 $ 134 $ 10,779,685 (In thousands) Risk Rate Risk Rate Risk Rate Risk Rate Risk Rate Total December 31, 2016 Consumer: Credit cards $ 183,943 $ -- $ 648 $ -- $ -- $ 184,591 Other consumer 301,632 26 2,314 -- -- 303,972 Total consumer 485,575 26 2,962 -- -- 488,563 Real estate: Construction 330,080 98 6,565 16 -- 336,759 Single family residential 875,603 4,024 24,460 158 -- 904,245 Other commercial 1,738,207 6,874 41,994 -- -- 1,787,075 Total real estate 2,943,890 10,996 73,019 174 -- 3,028,079 Commercial: Commercial 616,805 558 22,162 -- -- 639,525 Agricultural 148,218 104 2,033 -- 23 150,378 Total commercial 765,023 662 24,195 -- 23 789,903 Other 20,662 -- -- -- -- 20,662 Loans acquired 1,217,886 22,181 64,075 1,541 -- 1,305,683 Total $ 5,433,036 $ 33,865 $ 164,251 $ 1,715 $ 23 $ 5,632,890
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Table Text Block]	(In thousands) Not Impaired Impaired Contractually required principal and interest at acquisition $ 2,021,388 $ 18,136 Non-accretable difference (expected losses and foregone interest) -- (6,731 ) Cash flows expected to be collected at acquisition 2,021,388 11,405 Accretable yield (36,340 ) -- Basis in acquired loans at acquisition $ 1,985,048 $ 11,405 (In thousands) Not Impaired Impaired Contractually required principal and interest at acquisition $ 2,246,212 $ -- Non-accretable difference (expected losses and foregone interest) -- -- Cash flows expected to be collected at acquisition 2,246,212 -- Accretable yield (37,834 ) -- Basis in acquired loans at acquisition $ 2,208,378 $ -- (In thousands) Not Impaired Impaired Contractually required principal and interest at acquisition $ 254,189 $ 3,452 Non-accretable difference (expected losses and foregone interest) -- (990 ) Cash flows expected to be collected at acquisition 254,189 2,462 Accretable yield (5,002 ) -- Basis in acquired loans at acquisition $ 249,187 $ 2,462 (In thousands) Not Impaired Impaired Contractually required principal and interest at acquisition $ 348,756 $ 1,605 Non-accretable difference (expected losses and foregone interest) -- (848 ) Cash flows expected to be collected at acquisition 348,756 757 Accretable yield (8,663 ) -- Basis in acquired loans at acquisition $ 340,093 $ 757 (In thousands) Not Impaired Impaired Contractually required principal and interest at acquisition $ 774,777 $ 15,716 Non-accretable difference (expected losses and foregone interest) -- (4,978 ) Cash flows expected to be collected at acquisition 774,777 10,738 Accretable yield (4,869 ) 12 Basis in acquired loans at acquisition $ 769,908 $ 10,750 (In thousands) Not Impaired Impaired Contractually required principal and interest at acquisition $ 1,153,255 $ 10,143 Non-accretable difference (expected losses and foregone interest) -- (3,247 ) Cash flows expected to be collected at acquisition 1,153,255 6,896 Accretable yield (23,712 ) 104 Basis in acquired loans at acquisition $ 1,129,543 $ 7,000
Tabular Temporal Display Of Adjustments Related To Purchased Covered Impaired Loans [Table Text Block]	(In thousands) 2017 2016 2015 Impact on net interest income $ 4,105 $ 3,072 $ 19,995 Non-interest income (1) -- -- (7,719 ) Net impact to pre-tax income 4,105 3,072 12,276 Net impact, net of taxes $ 2,495 $ 1,867 $ 7,461
Tabular Temporal Display of Accretable Yield [Table Text Block]	(In thousands) Accretable Carrying Balance, January 1, 2015 $ 20,635 $ 169,098 Additions (116 ) 17,750 Accretable yield adjustments 6,593 -- Accretion (21,038 ) 21,038 Payments and other reductions, net (5,120 ) (184,417 ) Balance, December 31, 2015 954 23,469 Additions 19 757 Accretable yield adjustments 5,122 -- Accretion (4,440 ) 4,440 Payments and other reductions, net -- (10,864 ) Balance, December 31, 2016 1,655 17,802 Additions -- 13,793 Accretable yield adjustments 4,893 -- Accretion (5,928 ) 5,928 Payments and other reductions, net -- (20,407 ) Balance, December 31, 2017 $ 620 $ 17,116
Summary Of The Changes In The FDIC True-Up Provision [Table Text Block]	(In thousands) FDIC True-up Balance, January 1, 2015 $ 8,308 Amortization expense 107 Adjustments related to changes in expected losses 720 Loss share termination agreement (9,135 ) Balance, December 31, 2015 $ --
Acquired Loans [Member]
Notes Tables
Schedule of Financing Receivables, Non Accrual Status [Table Text Block]	(In thousands) December 31, December 31, Consumer: Other consumer $ 334 $ 456 Total consumer 334 456 Real estate: Construction 1,767 7,961 Single family residential 12,151 13,366 Other commercial 7,401 22,045 Total real estate 21,319 43,372 Commercial: Commercial 1,748 2,806 Agricultural 84 198 Total commercial 1,832 3,004 Total $ 23,485 $ 46,832
Past Due Financing Receivables [Table Text Block]	(In thousands) Gross 90 Days Total Current Total 90 Days December 31, 2017 Consumer: Other consumer $ 889 $ 260 $ 1,149 $ 50,318 $ 51,467 $ 108 Total consumer 889 260 1,149 50,318 51,467 108 Real estate: Construction 2,577 1,448 4,025 633,007 637,032 279 Single family residential 12,936 3,302 16,238 776,990 793,228 126 Other commercial 17,176 5,647 22,823 2,364,954 2,387,777 2,565 Total real estate 32,689 10,397 43,086 3,774,951 3,818,037 2,970 Commercial: Commercial 2,344 1,039 3,383 992,204 995,587 67 Agricultural 51 -- 51 66,525 66,576 -- Total commercial 2,395 1,039 3,434 1,058,729 1,062,163 67 Other 15 -- 15 142,394 142,409 -- Total $ 35,988 $ 11,696 $ 47,684 $ 5,026,392 $ 5,074,076 $ 3,145 December 31, 2016 Consumer: Other consumer $ 571 $ 189 $ 760 $ 48,917 $ 49,677 $ -- Total consumer 571 189 760 48,917 49,677 -- Real estate: Construction 132 7,332 7,464 50,123 57,587 -- Single family residential 8,358 4,857 13,215 409,961 423,176 11 Other commercial 2,836 10,741 13,577 676,531 690,108 -- Total real estate 11,326 22,930 34,256 1,136,615 1,170,871 11 Commercial: Commercial 723 2,153 2,876 78,961 81,837 -- Agricultural 48 -- 48 3,250 3,298 -- Total commercial 771 2,153 2,924 82,211 85,135 -- Total $ 12,668 $ 25,272 $ 37,940 $ 1,267,743 $ 1,305,683 $ 11
Financing Receivable Credit Quality Indicators [Table Text Block]	(In thousands) Risk Rate Risk Rate Risk Rate Risk Rate Risk Rate Total December 31, 2017 Consumer: Other consumer $ 50,625 $ 21 $ 821 $ -- $ -- $ 51,467 Total consumer Real estate: Construction 468,610 166,710 1,712 -- -- 637,032 Single family residential 770,954 2,618 19,656 -- -- 793,228 Other commercial 2,337,097 15,064 35,616 -- -- 2,387,777 Total real estate 3,576,661 184,392 56,984 3,818,037 Commercial: Commercial 946,322 13,901 35,364 -- -- 995,587 Agricultural 66,367 -- 209 -- -- 66,576 Total commercial 1,012,689 13,901 35,573 -- -- 1,062,163 Other 142,409 -- -- -- -- 142,409 Total $ 4,782,384 $ 198,314 $ 93,378 $ -- $ -- $ 5,074,076 December 31, 2016 Consumer: Other consumer $ 48,992 $ 14 $ 671 $ -- $ -- $ 49,677 Total consumer 48,992 14 671 -- -- 49,677 Real estate: Construction 50,704 88 6,795 -- -- 57,587 Single family residential 400,553 2,696 18,392 1,535 -- 423,176 Other commercial 641,018 17,384 31,706 -- -- 690,108 Total real estate 1,092,275 20,168 56,893 1,535 -- 1,170,871 Commercial: Commercial 73,609 1,965 6,257 6 -- 81,837 Agricultural 3,010 34 254 -- -- 3,298 Total commercial 76,619 1,999 6,511 6 -- 85,135 Total $ 1,217,886 $ 22,181 $ 64,075 $ 1,541 $ -- $ 1,305,683

Note 7 - Goodwill and Other I37

Note 7 - Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Intangible Assets and Goodwill [Table Text Block]	(In thousands) 2017 2016 Goodwill $ 842,651 $ 348,505 Core deposit premiums: Gross carrying amount 105,984 48,692 Accumulated amortization (16,659 ) (10,625 ) Core deposit premiums, net 89,325 38,067 Books of business intangible: Gross carrying amount 15,414 15,884 Accumulated amortization (2,827 ) (1,716 ) Books of business intangible, net 12,587 14,168 Other intangibles: Gross carrying amount 6,037 2,068 Accumulated amortization (1,878 ) (1,344 ) Other intangibles, net 4,159 724 Other intangible assets, net 106,071 52,959 Total goodwill and other intangible assets $ 948,722 $ 401,464
Core Deposit Premium [Member]
Notes Tables
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	Year (In thousands) 2018 $ 11,355 2019 11,045 2020 11,032 2021 10,970 2022 10,918 Thereafter 50,751 Total $ 106,071

Note 9 - Income Taxes (Tables)

Note 9 - Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	(In thousands) 2017 2016 2015 Income taxes currently payable $ 38,732 $ 36,792 $ 19,301 Deferred income taxes 23,251 9,832 13,599 Provision for income taxes $ 61,983 $ 46,624 $ 32,900
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	(In thousands) 2017 2016 Deferred tax assets: Loans acquired $ 19,885 $ 7,986 Allowance for loan losses 10,773 14,754 Valuation of foreclosed assets 2,852 3,958 Tax NOLs from acquisition 7,821 13,077 Deferred compensation payable 2,433 2,785 Accrued equity and other compensation 5,302 8,107 Acquired securities 578 1,098 Unrealized loss on available-for-sale securities 6,107 9,559 Other 8,813 7,101 Gross deferred tax assets 64,564 68,425 Deferred tax liabilities: Goodwill and other intangible amortization (32,572 ) (29,601 ) Accumulated depreciation (8,945 ) (5,370 ) Other (4,413 ) (5,877 ) Gross deferred tax liabilities (45,930 ) (40,848 ) Net deferred tax asset, included in other assets $ 18,634 $ 27,577
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	(In thousands) 2017 2016 2015 Computed at the statutory rate (35%) $ 54,223 $ 50,203 $ 37,543 Increase (decrease) in taxes resulting from: State income taxes, net of federal tax benefit 1,582 2,121 2,097 Discrete items related to ASU 2016-09 (1,480 ) -- -- Tax exempt interest income (5,135 ) (5,112 ) (5,432 ) Impact of DTA remeasurement 11,471 -- -- Section 382 adjustment -- -- (2,293 ) Other differences, net 1,322 (588 ) 985 Actual tax provision $ 61,983 $ 46,624 $ 32,900

Note 10 - Securities Sold Und39

Note 10 - Securities Sold Under Agreements to Repurchase (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Repurchase Agreements [Table Text Block]	Remaining Contractual Maturity of the Agreements (In thousands) Overnight and Up to 30 Days 30-90 Days Greater than Total December 31, 2017 Repurchase agreements: U.S. Government agencies $ 122,019 $ -- $ -- $ -- $ 122,019 December 31, 2016 Repurchase agreements: U.S. Government agencies $ 101,647 $ -- $ -- $ 757 $ 102,404

Note 11 - Other Borrowings an40

Note 11 - Other Borrowings and Subordinated Debentures (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Debt [Table Text Block]	(In thousands) 2017 2016 Other Borrowings FHLB advances, net of discount, due 2018 to 2033, 1.20% to 7.37% secured by residential real estate loans $ 1,261,642 $ 225,230 Revolving credit agreement, due 10/5/2018, floating rate of 1.50% above the one month LIBOR rate, unsecured 75,000 -- Notes payable, due 10/15/2020, 3.85%, fixed rate, unsecured 43,382 47,929 Total other borrowings 1,380,024 273,159 Subordinated Debentures Trust preferred securities, due 12/30/2033, floating rate of 2.80% above the three month LIBOR rate, reset quarterly, callable without penalty 20,620 20,620 Trust preferred securities, net of discount, due 6/30/2035, floating rate of 1.75% above the three month LIBOR rate, reset quarterly, callable without penalty 9,327 9,225 Trust preferred securities, net of discount, due 9/15/2037, floating rate of 1.37% above the three month LIBOR rate, reset quarterly 10,284 10,130 Trust preferred securities, net of discount, due 12/5/2033, floating rate of 2.88% above the three month LIBOR rate, reset quarterly, callable without penalty 5,156 5,161 Trust preferred securities, net of discount, due 10/18/2034, floating rate of 2.00% above the three month LIBOR rate, reset quarterly, callable without penalty 5,148 5,105 Trust preferred securities, net of discount, due 6/6/2037, floating rate of 1.57% above the three month LIBOR rate, reset quarterly, callable without penalty 10,288 10,156 Trust preferred securities, due 12/15/2035, floating rate of 1.45% above the three month LIBOR rate, reset quarterly, callable without penalty 6,702 -- Trust preferred securities, due 6/26/2033, floating rate of 3.10% above the three month LIBOR rate, reset quarterly, callable without penalty 20,619 -- Trust preferred securities, due 10/7/2033, floating rate of 2.85% above the three month LIBOR rate, reset quarterly, callable without penalty 25,774 -- Trust preferred securities, due 9/15/2037, floating rate of 2.00% above the three month LIBOR rate, reset quarterly, callable without penalty 8,248 -- Other subordinated debentures, net of discount, due 9/30/2023, floating rate equal to daily average of prime rate, reset quarterly 18,399 -- Total subordinated debentures 140,565 60,397 Total other borrowings and subordinated debentures $ 1,520,589 $ 333,556
Schedule of Maturities of Long-term Debt [Table Text Block]	Year (In thousands) 2018 $ 23,093 2019 7,486 2020 36,222 2021 2,165 2022 1,314 Thereafter 148,307 Total $ 218,587

Note 13 - Transactions With R41

Note 13 - Transactions With Related Parties (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Related Party Transactions [Table Text Block]	(In thousands) 2017 2016 Balance, beginning of year $ 65,834 $ 58,404 New extensions of credit 9,092 18,298 Repayments (16,059 ) (10,868 ) Balance, end of year $ 58,867 $ 65,834

Note 14 - Employee Benefit Pl42

Note 14 - Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Share-based Compensation, Stock Options, Activity [Table Text Block]	Stock Options Stock Awards Stock Units Number Weighted Number Weighted Number Weighted Balance, December 31, 2014 240 $ 13.86 454 $ 15.94 -- $ -- Granted 750 22.35 190 21.73 40 18.58 Stock Options Exercised (142 ) 11.29 -- -- -- -- Stock Options from Acquisitions 132 10.22 -- -- -- -- Stock Awards/Units Vested -- -- (262 ) 17.39 -- -- Forfeited/Expired (10 ) 12.25 (40 ) 17.68 -- -- Balance, December 31, 2015 970 20.31 342 17.83 40 18.58 Granted 116 23.51 272 23.46 216 23.48 Stock Options Exercised (128 ) 15.14 -- -- -- -- Stock Awards/Units Vested -- -- (318 ) 20.96 (25 ) 22.77 Forfeited/Expired (12 ) 17.53 (18 ) 21.85 (6 ) 23.51 Balance, December 31, 2016 946 21.43 278 20.48 225 22.70 Granted -- -- -- -- 849 28.86 Stock Options Exercised (122 ) 17.66 -- -- -- -- Stock Awards/Units Vested -- -- (91 ) 19.40 (392 ) 27.13 Forfeited/Expired (12 ) 22.67 (25 ) 21.91 (30 ) 25.76 Balance, December 31, 2017 812 $ 21.98 162 $ 20.86 652 $ 27.92 Exercisable, December 31, 2017 711 $ 21.85
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]	Options Outstanding Options Exercisable Range of Number Weighted Weighted Number Weighted $8.78 - $10.57 7 2.36 $ 9.64 7 $ 9.64 10.65 - 10.65 7 5.06 10.65 4 10.65 10.76 - 10.76 3 2.05 10.76 3 10.76 15.16 - 15.16 36 0.41 15.16 36 15.16 20.29 - 20.29 78 7.00 20.29 78 20.29 20.36 - 20.36 3 6.88 20.36 2 20.36 22.20 - 22.20 82 6.93 22.20 57 22.20 22.75 - 22.75 481 7.15 22.75 481 22.75 23.51 - 23.51 108 7.82 23.51 36 23.51 24.07 - 24.07 7 7.71 24.07 7 24.07 $8.78 - $24.07 812 6.83 $ 21.98 711 $ 21.85
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	2016 2015 Expected dividend yield 1.96 % 2.06 % Expected stock price volatility 27.34 % 16.96 % Risk-free interest rate 2.01 % 2.17 % Expected life of options (in years) 7 10

Note 15 - Additional Cash Flo43

Note 15 - Additional Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]	(In thousands) 2017 2016 2015 Interest paid $ 39,384 $ 22,069 $ 21,700 Income taxes paid 35,770 39,824 20,127 Transfers of loans not covered by FDIC loss share to foreclosed assets and other real estate owned 6,983 4,604 16,456 Transfers of loans acquired covered by FDIC loss share to foreclosed assets covered by FDIC loss share -- -- 4,349 Transfers of foreclosed assets covered by FDIC loss share to foreclosed assets and other real estate owned -- -- 13,895 Transfers of loans acquired covered by FDIC loss share to loans acquired not covered by FDIC loss share -- -- 88,922 Transfers of premises to foreclosed assets and other real estate owned 5,422 -- -- Transfers of premises held for sale to foreclosed assets and other real estate owned 3,188 652 6,126
Schedule of Cash Flow Information Related To Business Acquisition [Table Text Block]	(In thousands) 2017 2016 2015 Assets acquired $ 5,582,495 $ 585,500 $ 2,996,228 Liabilities assumed 5,022,824 530,695 2,680,140 Purchase price 1,055,993 76,300 535,003 Goodwill $ 496,322 $ 21,495 $ 218,915

Note 16 - Other Operating Exp44

Note 16 - Other Operating Expenses (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Other Operating Cost and Expense, by Component [Table Text Block]	(In thousands) 2017 2016 2015 Professional services $ 19,500 $ 14,630 $ 9,583 Postage 4,686 4,599 4,219 Telephone 4,262 4,294 4,817 Credit card expense 12,188 11,328 9,157 Marketing 11,141 6,929 6,337 Operating supplies 1,980 1,824 2,395 Amortization of intangibles 7,668 5,945 4,889 Branch right sizing expense 434 3,600 3,297 Other expense 27,020 20,364 20,001 Total other operating expenses $ 88,879 $ 73,513 $ 64,695

Note 17 - Fair Value Measurem45

Note 17 - Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	Fair Value Measurements (In thousands) Fair Value Quoted Prices in Significant Other Significant December 31, 2017 Available-for-sale securities U.S. Government agencies $ 139,724 $ -- $ 139,724 $ -- Mortgage-backed securities 1,187,317 -- 1,187,317 -- States and political subdivisions 143,165 -- 143,165 -- Other securities 119,311 -- 119,311 -- Other assets held for sale 165,780 -- -- 165,780 Derivative asset 3,634 -- 3,634 -- Other liabilities held for sale (157,366 ) -- -- (157,366 ) Derivative liability (3,068 ) -- (3,068 ) -- December 31, 2016 Available-for-sale securities U.S. Treasury $ 300 $ 300 $ -- $ -- U.S. Government agencies 137,771 -- 137,771 -- Mortgage-backed securities 868,324 -- 868,324 -- States and political subdivisions 102,943 -- 102,943 -- Other securities 48,016 -- 48,016 -- Assets held in trading accounts 41 -- 41 -- Derivative asset 1,199 -- 1,199 -- Derivative liability (1,274 ) -- (1,274 ) --
Fair Value Measurements, Nonrecurring [Table Text Block]	Fair Value Measurements Using (In thousands) Fair Value Quoted Prices in Significant Other Significant December 31, 2017 Impaired loans (1) (2) $ 11,229 $ -- $ -- $ 11,229 Foreclosed assets and other real estate owned (1) 24,093 -- -- 24,093 December 31, 2016 Impaired loans (1) (2) $ 17,154 $ -- $ -- $ 17,154 Foreclosed assets held for sale (1) 17,806 -- -- 17,806
Fair Value, by Balance Sheet Grouping [Table Text Block]	Carrying Fair Value Measurements (In thousands) Amount Level 1 Level 2 Level 3 Total December 31, 2017 Financial assets: Cash and cash equivalents $ 598,042 $ 598,042 $ -- $ -- $ 598,042 Interest bearing balances due from banks - time 3,314 -- 3,314 -- 3,314 Held-to-maturity securities 368,058 -- 373,298 -- 373,298 Mortgage loans held for sale 24,038 -- -- 24,038 24,038 Interest receivable 43,528 -- 43,528 -- 43,528 Legacy loans (net of allowance) 5,663,941 -- -- 5,646,505 5,646,505 Loans acquired (net of allowance) 5,074,076 -- -- 5,058,455 5,058,455 Financial liabilities: Non-interest bearing transaction accounts 2,665,249 -- 2,665,249 -- 2,665,249 Interest bearing transaction accounts and savings deposits 6,494,896 -- 6,494,896 -- 6,494,896 Time deposits 1,932,730 -- -- 1,915,539 1,915,539 Federal funds purchased and securities sold under agreements to repurchase 122,444 -- 122,444 -- 122,444 Other borrowings 1,380,024 -- 1,381,365 -- 1,381,365 Subordinated debentures 140,565 -- 136,474 -- 136,474 Interest payable 4,564 -- 4,564 -- 4,564 December 31, 2016 Financial assets Cash and cash equivalents $ 285,659 $ 285,659 $ -- $ -- $ 285,659 Interest bearing balances due from banks - time 4,563 -- 4,563 -- 4,563 Held-to-maturity securities 462,096 -- 465,960 -- 465,960 Mortgage loans held for sale 27,788 -- -- 27,788 27,788 Interest receivable 27,788 -- 27,788 -- 27,788 Legacy loans (net of allowance) 4,290,921 -- -- 4,305,165 4,305,165 Loans acquired (net of allowance) 1,305,683 -- -- 1,310,017 1,310,017 Financial liabilities: Non-interest bearing transaction accounts 1,491,676 -- 1,491,676 -- 1,491,676 Interest bearing transaction accounts and savings deposits 3,956,483 -- 3,956,483 -- 3,956,483 Time deposits 1,287,060 -- -- 1,278,339 1,278,339 Federal funds purchased and securities sold under agreements to repurchase 115,029 -- 115,029 -- 115,029 Other borrowings 273,159 -- 292,367 -- 292,367 Subordinated debentures 60,397 -- 55,318 -- 55,318 Interest payable 1,668 -- 1,668 -- 1,668

Note 21 - Stockholders' Equity

Note 21 - Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]	Actual Minimum To Be Well (In thousands) Amount Ratio (%) Amount Ratio (%) Amount Ratio (%) As of December 31, 2017 Total Risk-Based Capital Ratio Simmons First National Corporation $ 1,388,970 11.4 $ 974,716 8.0 $ N/A Simmons Bank 877,728 12.1 580,316 8.0 725,395 10.0 Bank SNB 259,077 10.9 190,148 8.0 237,685 10.0 Southwest Bank 297,164 11.0 216,119 8.0 270,149 10.0 Tier 1 Risk-Based Capital Ratio Simmons First National Corporation 1,199,457 9.8 734,361 6.0 N/A Simmons Bank 835,787 11.5 436,063 6.0 581,417 8.0 Bank SNB 255,360 10.7 143,193 6.0 190,923 8.0 Southwest Bank 294,874 10.9 162,316 6.0 216,421 8.0 Common Equity Tier 1 Capital Ratio Simmons First National Corporation 1,199,457 9.8 550,771 4.5 N/A Simmons Bank 835,787 11.5 327,047 4.5 472,401 6.5 Bank SNB 255,360 10.7 107,394 4.5 155,125 6.5 Southwest Bank 294,874 10.9 121,737 4.5 175,842 6.5 Tier 1 Leverage Ratio Simmons First National Corporation 1,199,457 9.2 521,503 4.0 N/A Simmons Bank 835,787 9.2 363,386 4.0 454,232 5.0 Bank SNB 255,360 10.1 101,133 4.0 126,416 5.0 Southwest Bank 294,874 12.2 96,680 4.0 120,850 5.0 As of December 31, 2016 Total Risk-Based Capital Ratio Simmons First National Corporation $ 912,948 15.1 $ 483,681 8.0 $ N/A Simmons Bank 830,921 13.8 481,693 8.0 602,117 10.0 Tier 1 Risk-Based Capital Ratio Simmons First National Corporation 872,707 14.5 361,120 6.0 N/A Simmons Bank 790,673 13.2 359,397 6.0 479,196 8.0 Common Equity Tier 1 Capital Ratio Simmons First National Corporation 812,310 13.5 270,770 4.5 N/A Simmons Bank 790,673 13.2 269,548 4.5 389,347 6.5 Tier 1 Leverage Ratio Simmons First National Corporation 872,707 11.0 317,348 4.0 N/A Simmons Bank 790,673 10.0 316,269 4.0 395,337 5.0

Note 22 - Condensed Financial47

Note 22 - Condensed Financial Information (Parent Company Only) (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Condensed Balance Sheet [Table Text Block]	(In thousands) 2017 2016 ASSETS Cash and cash equivalents $ 19,101 $ 93,266 Investment securities 2,789 79 Investments in wholly-owned subsidiaries 2,288,687 1,141,294 Loans 993 1,083 Intangible assets, net 133 133 Premises and equipment 10,369 11,534 Other assets 31,181 27,955 TOTAL ASSETS $ 2,353,253 $ 1,275,344 LIABILITIES Short-term debt $ 75,000 $ -- Long-term debt 183,947 108,326 Other liabilities 9,742 15,907 Total liabilities 268,689 124,233 STOCKHOLDERS’ EQUITY Common stock 920 626 Surplus 1,586,034 711,663 Undivided profits 514,874 454,034 Accumulated other comprehensive loss Unrealized depreciation on available-for-sale securities, net of income taxes of ($6,108) and ($9,818) at December 31, 2017 and 2016 respectively (17,264 ) (15,212 ) Total stockholders’ equity 2,084,564 1,151,111 TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY $ 2,353,253 $ 1,275,344
Condensed Income Statement [Table Text Block]	(In thousands) 2017 2016 2015 INCOME Dividends from subsidiaries $ 69,107 $ 83,710 $ 84,128 Other income 4,111 2,465 2,303 Income 73,218 86,175 86,431 EXPENSE 32,234 21,990 24,594 Income before income taxes and equity in undistributed net income of subsidiaries 40,984 64,185 61,837 Provision for income taxes (12,311 ) (7,557 ) (8,251 ) Income before equity in undistributed net income of subsidiaries 53,295 71,742 70,088 Equity in undistributed net income of subsidiaries 39,645 25,072 4,276 NET INCOME 92,940 96,814 74,364 Preferred stock dividends -- 24 257 NET INCOME AVAILABLE TO COMMON SHAREHOLDERS $ 92,940 $ 96,790 $ 74,107
Condensed Statement of Comprehensive Income [Table Text Block]	(In thousands) 2017 2016 2015 NET INCOME $ 92,940 $ 96,814 $ 74,364 OTHER COMPREHENSIVE INCOME Equity in other comprehensive income (loss) income of subsidiaries 964 (12,547 ) (1,329 ) COMPREHENSIVE INCOME $ 93,904 $ 84,267 $ 73,035
Condensed Cash Flow Statement [Table Text Block]	(In thousands) 2017 2016 2015 CASH FLOWS FROM OPERATING ACTIVITIES Net income $ 92,940 $ 96,814 $ 74,364 Items not requiring (providing) cash Stock-based compensation expense 10,681 3,418 4,018 Depreciation and amortization 1,183 700 317 Deferred income taxes 1,190 (2,526 ) 1,287 Equity in undistributed net income of bank subsidiaries (39,645 ) (25,072 ) (4,276 ) Changes in Other assets 8,585 2,816 (15,232 ) Other liabilities (6,769 ) (1,358 ) 13,121 Net cash provided by operating activities 68,165 74,792 73,599 CASH FLOWS FROM INVESTING ACTIVITIES Net originations of loans 90 (1,710 ) -- Net purchases of premises and equipment (18 ) (6,896 ) 56 Additional investment in subsidiary (15,000 ) -- -- Proceeds from maturities of available-for-sale securities 42 1,973 -- Purchases of available-for-sale securities (2,752 ) (3 ) (354 ) Cash received (paid) in business combinations (100,468 ) (35,048 ) 44,173 Net cash (used in) provided by investing activities (118,106 ) (41,684 ) 43,875 CASH FLOWS FROM FINANCING ACTIVITIES Issuance (repayment) of long-term debt, net 8,014 (4,544 ) 8,126 Issuance of common stock, net 2,878 4,938 3,529 Dividends paid on preferred stock -- (24 ) (257 ) Dividends paid on common stock (35,116 ) (28,743 ) (27,026 ) Redemption of preferred stock -- (30,852 ) -- Net cash used in financing activities (24,224 ) (59,225 ) (15,628 ) (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS (74,165 ) (26,117 ) 101,846 CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR 93,266 119,383 17,537 CASH AND CASH EQUIVALENTS, END OF YEAR $ 19,101 $ 93,266 $ 119,383

Note 1 - Summary of Significa48

Note 1 - Summary of Significant Accounting Policies (Details Textual) shares in Thousands	Feb. 08, 2018	Sep. 15, 2015USD ($)	Sep. 30, 2015USD ($)	Dec. 31, 2017USD ($)shares	Dec. 31, 2016USD ($)shares	Dec. 31, 2015USD ($)shares
Number of Financial Centers				200
Number of Reportable Segments				1
FDIC Indemnification Asset, Cash Payments Received		$ 2,368,000	$ 2,368,000
Gain (Loss) on Contract Termination		$ (7,476,000)	$ (7,476,000)			$ (7,476,000)
Derivative Asset, Notional Amount				$ 303,500,000	$ 99,200,000
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares				0	0	0
Subsequent Event [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	2

Note 1 - Summary of Significa49

Note 1 - Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net income available to common shareholders		$ 92,940	$ 96,790	$ 74,107
Average common shares outstanding (in shares)		69,385	61,291	56,168
Average potential dilutive common shares (in shares)		468	636	252
Average diluted common shares (in shares)		69,853	61,927	56,420
Basic earnings per share (in dollars per share)	[1]	$ 1.34	$ 1.58	$ 1.32
Diluted earnings per share (in dollars per share)	[1]	$ 1.33	$ 1.56	$ 1.31
[1]	All per share amounts have been restated to reflect the effect of the two-for-one stock split on February 8, 2018.

Note 2 - Acquisitions (Details

Note 2 - Acquisitions (Details Textual)	Oct. 19, 2017USD ($)shares	May 15, 2017USD ($)shares	Sep. 09, 2016USD ($)shares	Oct. 29, 2015USD ($)shares	Feb. 27, 2015USD ($)shares	Feb. 28, 2015shares	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Oct. 28, 2015USD ($)
Goodwill							$ 842,651,000	$ 348,505,000
OKSB Merger [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares	14,488,604
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	$ 431,400,000
Payments to Acquire Businesses, Gross	$ 95,000,000
Number of Bank Branches	29
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	$ 2,691,127,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Acquired Not Covered by FDIC Loss Share	2,000,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Total Deposits	1,966,355,000
Goodwill	228,932,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual							29,200,000
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual							10,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans	$ 1,996,453,000
First Texas Merger [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares	12,999,840
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	$ 387,100,000
Payments to Acquire Businesses, Gross	$ 70,000,000
Number of Bank Branches	15
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	$ 2,428,444,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Acquired Not Covered by FDIC Loss Share	2,200,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Total Deposits	1,881,658,000
Goodwill	238,019,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual							27,600,000
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual							5,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans	$ 2,208,378,000
OKSB and First Texas Acquisitions [Member]
Business Combination, Acquisition Related Costs							$ 9,400,000
Hardeman County Investment Company, Inc. [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares		1,599,940
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned		$ 42,600,000
Payments to Acquire Businesses, Gross		$ 30,000,000
Number of Bank Branches		10
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		$ 462,924,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Total Deposits		388,976,000
Goodwill		29,371,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans		$ 251,649,000
Citizens National Bank [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares			1,671,482
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned			$ 41,300,000
Payments to Acquire Businesses, Gross			$ 35,000,000
Number of Bank Branches			9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets			$ 585,149,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Acquired Not Covered by FDIC Loss Share			340,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Total Deposits			509,857,000
Goodwill			23,376,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans			$ 340,850,000
Liberty Bancshares, Inc. [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares					10,362,674
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned					$ 212,200,000
Number of Bank Branches					24
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets					$ 1,066,272,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Acquired Not Covered by FDIC Loss Share					780,658,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Total Deposits					874,714,000
Goodwill					$ 95,207,000
Community First Bancshares Inc [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares					13,105,830
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned					$ 268,300,000
Payments to Acquire Businesses, Gross					$ 9,974
Number of Bank Branches					33
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets					$ 1,915,061,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Acquired Not Covered by FDIC Loss Share					1,136,543,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Total Deposits					1,536,062,000
Goodwill					$ 110,440,000
Community First Bancshares Inc [Member] | Preferred Stock [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares					30,852
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned					$ 30,900,000
OTIC and TCO [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares				678,580
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned				$ 17,900,000
Payments to Acquire Businesses, Gross				5,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets				14,895,000
Goodwill				$ 13,268,000
Assets under Management, Carrying Amount									$ 1,000,000,000
Number of Investment in Shares Repurchased Through Acquisition | shares						1,000

Note 2 - Acquisitions - Assets

Note 2 - Acquisitions - Assets Acquired and Liabilities Assumed (Details) - USD ($)	Oct. 19, 2017	May 15, 2017	Sep. 09, 2016	Oct. 29, 2015	Feb. 27, 2015	Dec. 31, 2017	Dec. 31, 2016
Goodwill						$ 842,651,000	$ 348,505,000
Goodwill						$ 842,651,000	$ 348,505,000
OKSB Merger [Member]
Cash and due from banks	$ 79,517,000
Investment securities	484,173,000
Loans acquired	1,996,453,000
Allowance for loan losses
Foreclosed assets	5,157,000
Premises and equipment	26,667,000
Bank owned life insurance	28,704,000
Goodwill	228,932,000
Other assets	24,526,000
Total assets acquired	2,691,127,000
Non-interest bearing transaction accounts	485,971,000
Interest bearing transaction accounts and savings deposits	869,252,000
Time deposits	611,132,000
Total deposits	1,966,355,000
Securities sold under agreement to repurchase	11,256,000
Other borrowings	347,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debentures	46,393,000
Accrued interest and other liabilities	22,804,000
Total liabilities assumed	2,393,808,000
Equity
Total liabilities and equity assumed	2,393,808,000
Net assets acquired	297,319,000
Purchase price	526,251,000
Goodwill	228,932,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Acquired Not Covered by FDIC Loss Share	2,000,000,000
OKSB Merger [Member] | Core Deposit Premium [Member]
Intangibles	42,124,000
OKSB Merger [Member] | Other Intangible Assets [Member]
Intangibles	3,806,000
OKSB Merger [Member] | Cost Acquired [Member]
Cash and due from banks	79,517,000
Investment securities	485,468,000
Loans acquired	2,039,524,000
Allowance for loan losses	(26,957,000)
Foreclosed assets	6,284,000
Premises and equipment	21,210,000
Bank owned life insurance	28,704,000
Goodwill	13,545,000
Other assets	33,455,000
Total assets acquired	2,686,489,000
Non-interest bearing transaction accounts	485,971,000
Interest bearing transaction accounts and savings deposits	869,252,000
Time deposits	613,345,000
Total deposits	1,968,568,000
Securities sold under agreement to repurchase	11,256,000
Other borrowings	347,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debentures	46,393,000
Accrued interest and other liabilities	17,440,000
Total liabilities assumed	2,390,657,000
Equity	295,832,000
Total liabilities and equity assumed	2,686,489,000
Goodwill	13,545,000
OKSB Merger [Member] | Cost Acquired [Member] | Core Deposit Premium [Member]
Intangibles	1,933,000
OKSB Merger [Member] | Cost Acquired [Member] | Other Intangible Assets [Member]
Intangibles	3,806,000
OKSB Merger [Member] | Fair Value Adjustments [Member]
Cash and due from banks
Investment securities	(1,295,000)
Loans acquired	(43,071,000)
Allowance for loan losses	26,957,000
Foreclosed assets	(1,127,000)
Premises and equipment	5,457,000
Bank owned life insurance
Goodwill	(13,545,000)
Other assets	(8,929,000)
Total assets acquired	4,638,000
Non-interest bearing transaction accounts
Interest bearing transaction accounts and savings deposits
Time deposits	(2,213,000)
Total deposits	(2,213,000)
Securities sold under agreement to repurchase
Other borrowings
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debentures
Accrued interest and other liabilities	5,364,000
Total liabilities assumed	3,151,000
Equity	(295,832,000)
Total liabilities and equity assumed	(292,681,000)
Goodwill	(13,545,000)
OKSB Merger [Member] | Fair Value Adjustments [Member] | Core Deposit Premium [Member]
Intangibles	40,191,000
OKSB Merger [Member] | Fair Value Adjustments [Member] | Other Intangible Assets [Member]
Intangibles
First Texas Merger [Member]
Cash and due from banks	59,277,000
Investment securities	80,518,000
Loans acquired	2,208,378,000
Allowance for loan losses	(200,000)
Premises and equipment	34,987,000
Bank owned life insurance	7,190,000
Goodwill	238,019,000
Other assets	30,966,000
Total assets acquired	2,428,444,000
Non-interest bearing transaction accounts	74,410,000
Interest bearing transaction accounts and savings deposits	1,683,298,000
Time deposits	123,950,000
Total deposits	1,881,658,000
Securities sold under agreement to repurchase	50,000,000
Other borrowings	235,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debentures	29,512,000
Accrued interest and other liabilities	13,190,000
Total liabilities assumed	2,209,360,000
Equity
Total liabilities and equity assumed	2,209,360,000
Net assets acquired	219,084,000
Purchase price	457,103,000
Goodwill	238,019,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Acquired Not Covered by FDIC Loss Share	2,200,000,000
First Texas Merger [Member] | Core Deposit Premium [Member]
Intangibles	7,328,000
First Texas Merger [Member] | Cost Acquired [Member]
Cash and due from banks	59,277,000
Investment securities	81,114,000
Loans acquired	2,246,212,000
Allowance for loan losses	(20,864,000)
Premises and equipment	24,864,000
Bank owned life insurance	7,190,000
Goodwill	37,227,000
Other assets	18,263,000
Total assets acquired	2,453,283,000
Non-interest bearing transaction accounts	74,410,000
Interest bearing transaction accounts and savings deposits	1,683,298,000
Time deposits	124,233,000
Total deposits	1,881,941,000
Securities sold under agreement to repurchase	50,000,000
Other borrowings	235,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debentures	30,323,000
Accrued interest and other liabilities	11,727,000
Total liabilities assumed	2,208,991,000
Equity	244,292,000
Total liabilities and equity assumed	2,453,283,000
Goodwill	37,227,000
First Texas Merger [Member] | Cost Acquired [Member] | Core Deposit Premium [Member]
Intangibles
First Texas Merger [Member] | Fair Value Adjustments [Member]
Cash and due from banks
Investment securities	(596,000)
Loans acquired	(37,834,000)
Allowance for loan losses	20,664,000
Premises and equipment	10,123,000
Bank owned life insurance
Goodwill	(37,227,000)
Other assets	12,703,000
Total assets acquired	(24,839,000)
Non-interest bearing transaction accounts
Interest bearing transaction accounts and savings deposits
Time deposits	(283,000)
Total deposits	(283,000)
Securities sold under agreement to repurchase
Other borrowings
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debentures	(811,000)
Accrued interest and other liabilities	1,463,000
Total liabilities assumed	369,000
Equity	(244,292,000)
Total liabilities and equity assumed	(243,923,000)
Goodwill	(37,227,000)
First Texas Merger [Member] | Fair Value Adjustments [Member] | Core Deposit Premium [Member]
Intangibles	$ 7,328,000
Hardeman County Investment Company, Inc. [Member]
Cash and due from banks		$ 8,001,000
Investment securities		170,369,000
Loans acquired		251,649,000
Foreclosed assets		631,000
Premises and equipment		11,163,000
Bank owned life insurance		7,819,000
Goodwill		29,371,000
Other assets		2,638,000
Total assets acquired		462,924,000
Non-interest bearing transaction accounts		76,555,000
Interest bearing transaction accounts and savings deposits		214,872,000
Time deposits		97,549,000
Total deposits		388,976,000
Securities sold under agreement to repurchase		17,163,000
Other borrowings		3,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debentures		6,702,000
Accrued interest and other liabilities		3,815,000
Total liabilities assumed		419,656,000
Equity
Total liabilities and equity assumed		419,656,000
Net assets acquired		43,268,000
Purchase price		72,639,000
Goodwill		29,371,000
Interest bearing balances due from banks - time		1,984,000
Hardeman County Investment Company, Inc. [Member] | Core Deposit Premium [Member]
Intangibles		7,840,000
Hardeman County Investment Company, Inc. [Member] | Other Intangible Assets [Member]
Intangibles		830,000
Hardeman County Investment Company, Inc. [Member] | Cost Acquired [Member]
Cash and due from banks		8,001,000
Investment securities		170,654,000
Loans acquired		257,641,000
Allowance for loan losses		(2,382,000)
Foreclosed assets		1,083,000
Premises and equipment		9,905,000
Bank owned life insurance		7,819,000
Goodwill		11,485,000
Other assets		2,639,000
Total assets acquired		468,829,000
Non-interest bearing transaction accounts		76,555,000
Interest bearing transaction accounts and savings deposits		214,872,000
Time deposits		97,917,000
Total deposits		389,344,000
Securities sold under agreement to repurchase		17,163,000
Other borrowings		3,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debentures		6,702,000
Accrued interest and other liabilities		1,891,000
Total liabilities assumed		418,100,000
Equity		50,729,000
Total liabilities and equity assumed		468,829,000
Goodwill		11,485,000
Interest bearing balances due from banks - time		1,984,000
Hardeman County Investment Company, Inc. [Member] | Fair Value Adjustments [Member]
Cash and due from banks
Investment securities		(285,000)
Loans acquired		(5,992,000)
Allowance for loan losses		2,382,000
Foreclosed assets		(452,000)
Premises and equipment		1,258,000
Goodwill		(11,485,000)
Other assets		(1,000)
Total assets acquired		(5,905,000)
Non-interest bearing transaction accounts
Interest bearing transaction accounts and savings deposits
Time deposits		(368,000)
Total deposits		(368,000)
Securities sold under agreement to repurchase
Other borrowings
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debentures
Accrued interest and other liabilities		1,924,000
Total liabilities assumed		1,556,000
Equity		(50,729,000)
Total liabilities and equity assumed		(49,173,000)
Goodwill		(11,485,000)
Interest bearing balances due from banks - time
Hardeman County Investment Company, Inc. [Member] | Fair Value Adjustments [Member] | Core Deposit Premium [Member]
Intangibles		7,840,000
Hardeman County Investment Company, Inc. [Member] | Fair Value Adjustments [Member] | Other Intangible Assets [Member]
Intangibles		$ 830,000
Citizens National Bank [Member]
Cash and due from banks			$ 131,116,000
Investment securities			61,988,000
Loans acquired			340,850,000
Allowance for loan losses
Foreclosed assets			3,442,000
Premises and equipment			8,085,000
Bank owned life insurance			6,632,000
Goodwill			23,376,000
Other assets			17,370,000
Total assets acquired			585,149,000
Non-interest bearing transaction accounts			109,281,000
Interest bearing transaction accounts and savings deposits			204,912,000
Time deposits			195,664,000
Total deposits			509,857,000
Securities sold under agreement to repurchase			13,233,000
Accrued interest and other liabilities			5,088,000
Total liabilities assumed			532,225,000
Equity
Total liabilities and equity assumed			532,225,000
Net assets acquired			52,924,000
Purchase price			76,300,000
Goodwill			23,376,000
Federal funds sold			10,000,000
FHLB borrowings			4,047,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Acquired Not Covered by FDIC Loss Share			340,900,000
Citizens National Bank [Member] | Core Deposit Premium [Member]
Intangibles			5,075,000
Citizens National Bank [Member] | Other Intangible Assets [Member]
Intangibles			591,000
Citizens National Bank [Member] | Cost Acquired [Member]
Cash and due from banks			131,467,000
Investment securities			61,987,000
Loans acquired			350,361,000
Allowance for loan losses			(4,313,000)
Foreclosed assets			4,960,000
Premises and equipment			6,746,000
Bank owned life insurance			6,632,000
Other assets			17,364,000
Total assets acquired			585,204,000
Non-interest bearing transaction accounts			109,281,000
Interest bearing transaction accounts and savings deposits			204,912,000
Time deposits			195,664,000
Total deposits			509,857,000
Securities sold under agreement to repurchase			13,233,000
Accrued interest and other liabilities			3,558,000
Total liabilities assumed			530,648,000
Equity			54,556,000
Total liabilities and equity assumed			585,204,000
Federal funds sold			10,000,000
FHLB borrowings			4,000,000
Citizens National Bank [Member] | Cost Acquired [Member] | Core Deposit Premium [Member]
Intangibles
Citizens National Bank [Member] | Cost Acquired [Member] | Other Intangible Assets [Member]
Intangibles
Citizens National Bank [Member] | Fair Value Adjustments [Member]
Cash and due from banks			(351,000)
Investment securities			1,000
Loans acquired			(9,511,000)
Allowance for loan losses			4,313,000
Foreclosed assets			(1,518,000)
Premises and equipment			1,339,000
Bank owned life insurance
Other assets			6,000
Total assets acquired			(55,000)
Non-interest bearing transaction accounts
Interest bearing transaction accounts and savings deposits
Time deposits
Total deposits
Securities sold under agreement to repurchase
Accrued interest and other liabilities			1,530,000
Total liabilities assumed			1,577,000
Equity			(54,556,000)
Total liabilities and equity assumed			(52,979,000)
Federal funds sold
FHLB borrowings			47,000
Citizens National Bank [Member] | Fair Value Adjustments [Member] | Core Deposit Premium [Member]
Intangibles			5,075,000
Citizens National Bank [Member] | Fair Value Adjustments [Member] | Other Intangible Assets [Member]
Intangibles			$ 591,000
Liberty Bancshares, Inc. [Member]
Investment securities					$ 98,788,000
Allowance for loan losses
Premises and equipment					31,024,000
Bank owned life insurance					16,972,000
Goodwill					95,207,000
Total assets acquired					1,066,272,000
Non-interest bearing transaction accounts					146,618,000
Interest bearing transaction accounts and savings deposits					543,183,000
Time deposits					184,913,000
Total deposits					874,714,000
Accrued interest and other liabilities					8,128,000
Total liabilities assumed					949,303,000
Equity
Total liabilities and equity assumed					949,303,000
Net assets acquired					116,969,000
Purchase price					212,176,000
Goodwill					95,207,000
Federal funds sold					7,060,000
FHLB borrowings					46,351,000
Cash and due from banks, including time deposits					102,623,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Acquired Not Covered by FDIC Loss Share					780,658,000
Core deposit intangible					14,556,000
Other intangibles
Other assets					14,591,000
Subordinated debentures					20,110,000
Liberty Bancshares, Inc. [Member] | Cost Acquired [Member]
Investment securities					99,123,000
Allowance for loan losses					(10,422,000)
Premises and equipment					34,239,000
Bank owned life insurance					16,972,000
Total assets acquired					1,061,567,000
Non-interest bearing transaction accounts					146,618,000
Interest bearing transaction accounts and savings deposits					543,183,000
Time deposits					184,913,000
Total deposits					874,714,000
Accrued interest and other liabilities					7,828,000
Total liabilities assumed					949,290,000
Equity					112,277,000
Total liabilities and equity assumed					1,061,567,000
Federal funds sold					7,060,000
FHLB borrowings					46,128,000
Cash and due from banks, including time deposits					102,637,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Acquired Not Covered by FDIC Loss Share					790,493,000
Core deposit intangible					699,000
Other intangibles					3,063,000
Other assets					17,703,000
Subordinated debentures					20,620,000
Liberty Bancshares, Inc. [Member] | Fair Value Adjustments [Member]
Investment securities					(335,000)
Allowance for loan losses					10,422,000
Premises and equipment					(3,215,000)
Bank owned life insurance
Total assets acquired					4,705,000
Non-interest bearing transaction accounts
Interest bearing transaction accounts and savings deposits
Time deposits
Total deposits
Accrued interest and other liabilities					300,000
Total liabilities assumed					13,000
Equity					(112,277,000)
Total liabilities and equity assumed					(112,264,000)
Federal funds sold
FHLB borrowings					223,000
Cash and due from banks, including time deposits					(14,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Acquired Not Covered by FDIC Loss Share					(9,835,000)
Core deposit intangible					13,857,000
Other intangibles					(3,063,000)
Other assets					(3,112,000)
Subordinated debentures					(510,000)
Community First Bancshares Inc [Member]
Cash and due from banks					39,848,000
Investment securities					566,818,000
Allowance for loan losses
Premises and equipment					42,043,000
Bank owned life insurance					22,149,000
Goodwill					110,440,000
Total assets acquired					1,915,061,000
Non-interest bearing transaction accounts					103,825,000
Interest bearing transaction accounts and savings deposits					995,207,000
Time deposits					437,030,000
Total deposits					1,536,062,000
Accrued interest and other liabilities					9,370,000
Total liabilities assumed					1,726,297,000
Equity
Total liabilities and equity assumed					1,726,297,000
Net assets acquired					188,764,000
Purchase price					299,204,000
Goodwill					110,440,000
Federal funds sold					76,508,000
FHLB borrowings					143,721,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Acquired Not Covered by FDIC Loss Share					1,136,543,000
Core deposit intangible					11,273,000
Other intangibles					420,000
Other assets					11,474,000
Subordinated debentures					20,914,000
Foreclosed assets not covered by FDIC loss share					747,000
Deferred tax asset					7,238,000
Federal funds purchased and securities sold under agreement to repurchase					16,230,000
Community First Bancshares Inc [Member] | Cost Acquired [Member]
Cash and due from banks					39,848,000
Investment securities					570,199,000
Allowance for loan losses					(14,635,000)
Premises and equipment					44,837,000
Bank owned life insurance					22,149,000
Goodwill					100,000
Total assets acquired					1,918,325,000
Non-interest bearing transaction accounts					103,825,000
Interest bearing transaction accounts and savings deposits					995,207,000
Time deposits					436,181,000
Total deposits					1,535,213,000
Accrued interest and other liabilities					8,769,000
Total liabilities assumed					1,725,013,000
Equity					193,312,000
Total liabilities and equity assumed					1,918,325,000
Goodwill					100,000
Federal funds sold					76,508,000
FHLB borrowings					143,047,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Acquired Not Covered by FDIC Loss Share					1,163,398,000
Core deposit intangible
Other intangibles
Other assets					11,474,000
Subordinated debentures					21,754,000
Foreclosed assets not covered by FDIC loss share					747,000
Deferred tax asset					3,700,000
Federal funds purchased and securities sold under agreement to repurchase					16,230,000
Community First Bancshares Inc [Member] | Fair Value Adjustments [Member]
Cash and due from banks
Investment securities					(3,381,000)
Allowance for loan losses					14,635,000
Premises and equipment					(2,794,000)
Bank owned life insurance
Goodwill					(100,000)
Total assets acquired					(3,264,000)
Non-interest bearing transaction accounts
Interest bearing transaction accounts and savings deposits
Time deposits					849,000
Total deposits					849,000
Accrued interest and other liabilities					601,000
Total liabilities assumed					1,284,000
Equity					(193,312,000)
Total liabilities and equity assumed					(192,028,000)
Goodwill					(100,000)
Federal funds sold
FHLB borrowings					674,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Acquired Not Covered by FDIC Loss Share					(26,855,000)
Core deposit intangible					11,273,000
Other intangibles					420,000
Other assets
Subordinated debentures					(840,000)
Foreclosed assets not covered by FDIC loss share
Deferred tax asset					3,538,000
Federal funds purchased and securities sold under agreement to repurchase
OTIC and TCO [Member]
Cash and due from banks				$ 1,756,000
Investment securities				241,000
Premises and equipment				1,544,000
Goodwill				13,268,000
Total assets acquired				14,895,000
Accrued interest and other liabilities				302,000
Total liabilities assumed				4,540,000
Equity
Total liabilities and equity assumed				4,540,000
Net assets acquired				10,355,000
Purchase price				23,623,000
Goodwill				13,268,000
Other intangibles				9,733,000
Other assets				1,621,000
Deferred tax liability				4,238,000
OTIC and TCO [Member] | Cost Acquired [Member]
Cash and due from banks				1,756,000
Investment securities				241,000
Premises and equipment				1,126,000
Total assets acquired				3,875,000
Accrued interest and other liabilities				302,000
Total liabilities assumed				365,000
Equity				3,510,000
Total liabilities and equity assumed				3,875,000
Other intangibles
Other assets				752,000
Deferred tax liability				63,000
OTIC and TCO [Member] | Fair Value Adjustments [Member]
Cash and due from banks
Investment securities
Premises and equipment				418,000
Total assets acquired				11,020,000
Accrued interest and other liabilities
Total liabilities assumed				4,175,000
Equity				(3,510,000)
Total liabilities and equity assumed				665,000
Other intangibles				9,733,000
Other assets				869,000
Deferred tax liability				$ 4,175,000

Note 2 - Acquisitions - Summary

Note 2 - Acquisitions - Summary of Unaudited Pro Forma Information (Details) - OKSB and First Texas Acquisitions [Member] - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016
Revenue (1)	[1]	$ 654,358	$ 620,461
Net income		$ 130,947	$ 136,199
Diluted earnings per share (in dollars per share)		$ 1.43	$ 1.52
[1]	Net interest income plus noninterest income.

Note 3 - Investment Securitie53

Note 3 - Investment Securities (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Securities Continuous Unrealized Loss Position, Fair Value	$ 1,400,000,000	$ 1,200,000,000
Securities Continuous Unrealized Loss Position Fair Value Percent of Portfolio	73.50%	75.70%
Available-for-sale Securities Pledged as Collateral	$ 1,200,000,000	$ 915,200,000
Available-for-sale Securities, Gross Realized Gains	2,400,000	5,800,000	$ 350,000
Available-for-sale Securities, Gross Realized Losses	$ 1,300,000	$ 0	$ 43,000
Income Tax Benefit Related to Security Gains (Losses) Percentage	39.225%

Note 3 - Investment Securitie54

Note 3 - Investment Securities - Summary of Investment Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Held-to-Maturity
Amortized Cost	$ 368,058	$ 462,096
Gross Unrealized Gains	5,977	5,137
Gross Unrealized Losses	(737)	(1,273)
Estimated Fair Value	373,298	465,960
Available-for-Sale
Amortized Cost	1,612,324	1,181,484
Gross Unrealized Gains	2,100	1,279
Gross Unrealized Losses	(24,907)	(25,409)
Estimated Fair Value	1,589,517	1,157,354
US Government Agencies Debt Securities [Member]
Held-to-Maturity
Amortized Cost	46,945	76,875
Gross Unrealized Gains	7	107
Gross Unrealized Losses	(228)	(182)
Estimated Fair Value	46,724	76,800
Available-for-Sale
Amortized Cost	141,559	140,005
Gross Unrealized Gains	116	67
Gross Unrealized Losses	(1,951)	(2,301)
Estimated Fair Value	139,724	137,771
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Held-to-Maturity
Amortized Cost	16,132	19,773
Gross Unrealized Gains	8	63
Gross Unrealized Losses	(287)	(249)
Estimated Fair Value	15,853	19,587
Available-for-Sale
Amortized Cost	1,208,017	885,783
Gross Unrealized Gains	246	178
Gross Unrealized Losses	(20,946)	(17,637)
Estimated Fair Value	1,187,317	868,324
US States and Political Subdivisions Debt Securities [Member]
Held-to-Maturity
Amortized Cost	301,491	362,532
Gross Unrealized Gains	5,962	4,967
Gross Unrealized Losses	(222)	(842)
Estimated Fair Value	307,231	366,657
Available-for-Sale
Amortized Cost	144,642	108,374
Gross Unrealized Gains	532	38
Gross Unrealized Losses	(2,009)	(5,469)
Estimated Fair Value	143,165	102,943
Other Securities [Member]
Held-to-Maturity
Amortized Cost	3,490	2,916
Gross Unrealized Gains
Gross Unrealized Losses
Estimated Fair Value	3,490	2,916
Available-for-Sale
Amortized Cost	118,106	47,022
Gross Unrealized Gains	1,206	996
Gross Unrealized Losses	(1)	(2)
Estimated Fair Value	119,311	48,016
US Treasury Securities [Member]
Available-for-Sale
Amortized Cost		300
Gross Unrealized Gains
Gross Unrealized Losses
Estimated Fair Value		$ 300

Note 3 - Investment Securitie55

Note 3 - Investment Securities - Securities With Unrealized Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Held-to-Maturity
Held-to-maturity, less than 12 months, estimated fair value	$ 57,731	$ 149,666
Held-to-maturity, less than 12 months, gross unrealized losses	251	1,187
Held-to-maturity, 12 months or more, estimated fair value	43,611	21,754
Held-to-maturity, 12 months or more, gross unrealized losses	486	86
Held-to-maturity, total, estimated fair value	101,342	171,420
Held-to-maturity, total, gross unrealized losses	737	1,273
Available-for-Sale
Available-for-sale, less than 12 months, estimated fair value	627,807	1,054,739
Available-for-sale, less than 12 months, gross unrealized losses	5,639	25,409
Available-for-sale, 12 months or more, estimated fair value	710,574
Available-for-sale, 12 months or more, gross unrealized losses	19,268
Available-for-sale, total, estimated fair value	1,338,381	1,054,739
Available-for-sale, total, gross unrealized losses	24,907	25,409
US Government Agencies Debt Securities [Member]
Held-to-Maturity
Held-to-maturity, less than 12 months, estimated fair value	11,961	32,859
Held-to-maturity, less than 12 months, gross unrealized losses	6	141
Held-to-maturity, 12 months or more, estimated fair value	32,778	19,959
Held-to-maturity, 12 months or more, gross unrealized losses	222	41
Held-to-maturity, total, estimated fair value	44,739	52,818
Held-to-maturity, total, gross unrealized losses	228	182
Available-for-Sale
Available-for-sale, less than 12 months, estimated fair value	91,988	126,325
Available-for-sale, less than 12 months, gross unrealized losses	921	2,301
Available-for-sale, 12 months or more, estimated fair value	25,742
Available-for-sale, 12 months or more, gross unrealized losses	1,030
Available-for-sale, total, estimated fair value	117,730	126,325
Available-for-sale, total, gross unrealized losses	1,951	2,301
Collateralized Mortgage Backed Securities [Member]
Held-to-Maturity
Held-to-maturity, less than 12 months, estimated fair value	5,471	11,833
Held-to-maturity, less than 12 months, gross unrealized losses	47	205
Held-to-maturity, 12 months or more, estimated fair value	8,946	1,465
Held-to-maturity, 12 months or more, gross unrealized losses	240	44
Held-to-maturity, total, estimated fair value	14,417	13,298
Held-to-maturity, total, gross unrealized losses	287	249
Available-for-Sale
Available-for-sale, less than 12 months, estimated fair value	510,770	833,393
Available-for-sale, less than 12 months, gross unrealized losses	4,516	17,637
Available-for-sale, 12 months or more, estimated fair value	609,329
Available-for-sale, 12 months or more, gross unrealized losses	16,430
Available-for-sale, total, estimated fair value	1,120,099	833,393
Available-for-sale, total, gross unrealized losses	20,946	17,637
US States and Political Subdivisions Debt Securities [Member]
Held-to-Maturity
Held-to-maturity, less than 12 months, estimated fair value	40,299	104,974
Held-to-maturity, less than 12 months, gross unrealized losses	198	841
Held-to-maturity, 12 months or more, estimated fair value	1,887	330
Held-to-maturity, 12 months or more, gross unrealized losses	24	1
Held-to-maturity, total, estimated fair value	42,186	105,304
Held-to-maturity, total, gross unrealized losses	222	842
Available-for-Sale
Available-for-sale, less than 12 months, estimated fair value	25,049	94,922
Available-for-sale, less than 12 months, gross unrealized losses	202	5,469
Available-for-sale, 12 months or more, estimated fair value	75,404
Available-for-sale, 12 months or more, gross unrealized losses	1,807
Available-for-sale, total, estimated fair value	100,453	94,922
Available-for-sale, total, gross unrealized losses	2,009	5,469
Other Securities [Member]
Available-for-Sale
Available-for-sale, less than 12 months, estimated fair value		99
Available-for-sale, less than 12 months, gross unrealized losses		2
Available-for-sale, 12 months or more, estimated fair value	99
Available-for-sale, 12 months or more, gross unrealized losses	1
Available-for-sale, total, estimated fair value	99	99
Available-for-sale, total, gross unrealized losses	$ 1	$ 2

Note 3 - Investment Securitie56

Note 3 - Investment Securities - Income Earned on Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Non-taxable
Total	$ 40,115	$ 33,479	$ 30,613
Held-to-maturity Securities [Member]
Taxable
Taxable	2,521	3,778	5,162
Non-taxable
Non-taxable	8,693	10,641	11,635
Available-for-sale Securities [Member]
Taxable
Taxable	25,996	17,928	12,129
Non-taxable
Non-taxable	$ 2,905	$ 1,132	$ 1,687

Note 3 - Investment Securitie57

Note 3 - Investment Securities - Maturities of Investment Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Held-to-maturity, amortized cost, one year or less	$ 46,377
Held-to-maturity, amortized cost, after one through five years	85,451
Held-to-maturity, amortized cost, after five through ten years	92,361
Held-to-maturity, amortized cost, after ten years	127,737
Held-to-maturity, amortized cost, securities not due on a single maturity date	16,132
Held-to-maturity, amortized cost, total	368,058	$ 462,096
Held-to-maturity, fair value, one year or less	46,255
Held-to-maturity, fair value, after one through five years	85,581
Held-to-maturity, fair value, after five through ten years	93,400
Held-to-maturity, fair value, after ten years	132,209
Held-to-maturity, fair value, securities not due on a single maturity date	15,853
Held-to-maturity, fair value, total	373,298	465,960
Available-for-sale, amortized cost, one year or less	590
Available-for-sale, amortized cost, after one through five years	35,616
Available-for-sale, amortized cost, after five through ten years	24,203
Available-for-sale, amortized cost, after ten years	225,892
Available-for-sale, amortized cost, securities not due on a single maturity date	1,208,017
Available-for-sale, amortized cost, other securities (no maturity)	118,006
Available-for-sale, amortized cost, total	1,612,324	1,181,484
Available-for-sale, fair value, one year or less	591
Available-for-sale, fair value, after one through five years	35,246
Available-for-sale, fair value, after five through ten years	23,953
Available-for-sale, fair value, after ten years	223,198
Available-for-sale, fair value, securities not due on a single maturity date	1,187,317
Available-for-sale, fair value, other securities (no maturity)	119,212
Available-for-sale, fair value, total	$ 1,589,517	$ 1,157,354

Note 4 - Other Assets and Oth58

Note 4 - Other Assets and Other Liabilities Held for Sale (Details Textual) $ in Thousands	Dec. 31, 2017USD ($)
Other Assets Held-for-sale	$ 165,780
Other Liabilities Held-for-sale	$ 157,366

Note 5 - Loans and Allowance 59

Note 5 - Loans and Allowance for Loan Losses (Details Textual)	9 Months Ended	12 Months Ended
	Sep. 30, 2017USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Loans and Leases Receivable, Gross		$ 10,780,000,000	$ 5,630,000,000
Impaired Financing Receivable, Recorded Investment		43,923,000	43,696,000
Impaired Financing Receivable, Related Allowance		338,000	680,000
Impaired Financing Receivable, Interest Income, Accrual Method		1,780,000	1,593,000	$ 1,200,000
Impaired Financing Receivable, Average Recorded Investment		$ 50,788,000	$ 35,978,000	16,700,000
Financing Receivable, Modifications, Number of Contracts		16	70
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 11,001,000	$ 13,907,000
Financing Receivable, Specific Reserve		26,000	402,000
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans		33,000
Mortgage Loans in Process of Foreclosure, Amount		5,057,000	1,714,000
Real Estate Acquired Through Foreclosure		32,118,000	26,895,000
Loans and Leases Receivable Classified		76,300,000	47,800,000
Covered Purchased Impaired Loans Allowance		418,000	954,000	954,000
Provision for Loan Losses Net of FDIC Loss Share Adjustments				400,000
Non Covered Impaired Loans Allowance Reclassified				954,000
Provision for Loan and Lease Losses		26,393,000	20,065,000	9,022,000
Loans and Leases Receivable, Allowance		41,668,000	36,286,000
Risk Ratings 6,7, and 8 [Member]
Loans and Leases Receivable Classified		175,600,000	166,000,000
Substandard [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net		17,100,000	17,800,000
OREO Secured by Residential Real Estate Properties [Member]
Real Estate Acquired Through Foreclosure		3,828,000	5,094,000
Commercial Real Estate Portfolio Segment [Member]
Loans and Leases Receivable, Gross		4,239,612,000	3,028,079,000
Impaired Financing Receivable, Recorded Investment		31,538,000	30,001,000
Impaired Financing Receivable, Related Allowance		338,000	417,000
Impaired Financing Receivable, Interest Income, Accrual Method		1,175,000	1,274,000
Impaired Financing Receivable, Average Recorded Investment		$ 34,239,000	$ 28,854,000
Financing Receivable, Modifications, Number of Contracts		5	51
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 8,310,000	$ 11,861,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	$ 440,000
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member]
Loans and Leases Receivable, Gross		1,094,633,000	904,245,000
Impaired Financing Receivable, Recorded Investment		13,431,000	12,383,000
Impaired Financing Receivable, Related Allowance		53,000	162,000
Impaired Financing Receivable, Interest Income, Accrual Method		443,000	419,000
Impaired Financing Receivable, Average Recorded Investment		$ 12,904,000	$ 9,486,000
Financing Receivable, Modifications, Number of Contracts		1	23
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 139,000	$ 1,570,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts		1	1
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down			$ 31,000
Real Estate Owned, Transfer to Real Estate Owned			69,000
Consumer Portfolio Segment [Member]
Loans and Leases Receivable, Gross		$ 465,516,000	488,563,000
Impaired Financing Receivable, Recorded Investment		4,775,000	2,173,000
Impaired Financing Receivable, Related Allowance			1,000
Impaired Financing Receivable, Interest Income, Accrual Method		153,000	67,000
Impaired Financing Receivable, Average Recorded Investment		$ 3,357,000	$ 1,412,000
Financing Receivable, Modifications, Number of Contracts			2
Financing Receivable, Modifications, Pre-Modification Recorded Investment			$ 50,000
Consumer Portfolio Segment [Member] | Consumer Loans [Member]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts			1
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down			$ 39,000
Restructured Loan [Member]
Financing Receivable, Modifications, Number of Contracts		13	15
Proceeds from Collection of Loans Receivable		$ 1.20	$ 3,700,000
Commercial Real Estate and Residential Real Estate [Member] | OREO Received in Full or Partial Satisfaction of Loans [Member]
Financing Receivable, Modifications, Pre-Modification Recorded Investment		0	236,000
Acquired Loans [Member]
Loans and Leases Receivable, Gross		5,074,076,000	1,305,683,000
Non Covered Impaired Loans Allowance Reclassified		418,000	954,000
Provision for Loan and Lease Losses		1,866,000	626,000
Allowance for Loan and Lease Losses, Write-offs		2,400,000	626,000
Loans and Leases Receivable, Allowance, Covered		418,000	954,000	954,000
Acquired Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans and Leases Receivable, Gross		3,818,037,000	1,170,871,000
Acquired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member]
Loans and Leases Receivable, Gross		793,228,000	423,176,000
Acquired Loans [Member] | Consumer Portfolio Segment [Member]
Loans and Leases Receivable, Gross		51,467,000	49,677,000
Loans, Including Acquired Loans [Member]
Loans and Leases Receivable, Allowance		$ 42,086,000	$ 37,240,000	$ 32,305,000

Note 5 - Loans and Allowance 60

Note 5 - Loans and Allowance for Loan Losses - Loan Portfolio by Categories (Details) - USD ($)		Dec. 31, 2017	Dec. 31, 2016
Loans		$ 10,780,000,000	$ 5,630,000,000
Loans acquired, net of discount and allowance	[1]	5,074,076,000	1,305,683,000
Total loans		10,779,685,000	5,632,890,000
Loans, Excluding Acquired Loans [Member]
Loans		5,705,609,000	4,327,207,000
Consumer Portfolio Segment [Member]
Loans		465,516,000	488,563,000
Consumer Portfolio Segment [Member] | Loans, Excluding Acquired Loans [Member]
Loans		465,516,000	488,563,000
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member]
Loans		185,422,000	184,591,000
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member] | Loans, Excluding Acquired Loans [Member]
Loans		185,422,000	184,591,000
Consumer Portfolio Segment [Member] | Other Loans [Member]
Loans		280,094,000	303,972,000
Consumer Portfolio Segment [Member] | Other Loans [Member] | Loans, Excluding Acquired Loans [Member]
Loans		280,094,000	303,972,000
Commercial Real Estate Portfolio Segment [Member]
Loans		4,239,612,000	3,028,079,000
Commercial Real Estate Portfolio Segment [Member] | Loans, Excluding Acquired Loans [Member]
Loans		4,239,612,000	3,028,079,000
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans		614,155,000	336,759,000
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Loans, Excluding Acquired Loans [Member]
Loans		614,155,000	336,759,000
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member]
Loans		1,094,633,000	904,245,000
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Loans, Excluding Acquired Loans [Member]
Loans		1,094,633,000	904,245,000
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member]
Loans		2,530,824,000	1,787,075,000
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] | Loans, Excluding Acquired Loans [Member]
Loans		2,530,824,000	1,787,075,000
Commercial Portfolio Segment [Member]
Loans		973,519,000	789,903,000
Commercial Portfolio Segment [Member] | Loans, Excluding Acquired Loans [Member]
Loans		973,519,000	789,903,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Loans		825,217,000	639,525,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Loans, Excluding Acquired Loans [Member]
Loans		825,217,000	639,525,000
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans		148,302,000	150,378,000
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Loans, Excluding Acquired Loans [Member]
Loans		148,302,000	150,378,000
Unallocated Financing Receivables [Member]
Loans		26,962,000	20,662,000
Unallocated Financing Receivables [Member] | Loans, Excluding Acquired Loans [Member]
Loans		$ 26,962,000	$ 20,662,000
[1]	See Note 6, Loans Acquired, for segregation of loans acquired by loan class.

Note 5 - Loans and Allowance 61

Note 5 - Loans and Allowance for Loan Losses - Nonaccrual Loans, Excluding Loans Acquired, Segregated by Class of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Loans in nonaccrual status	$ 45,642	$ 39,104
Consumer Portfolio Segment [Member]
Loans in nonaccrual status	4,775	2,166
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member]
Loans in nonaccrual status	170	373
Consumer Portfolio Segment [Member] | Other Loans [Member]
Loans in nonaccrual status	4,605	1,793
Commercial Real Estate Portfolio Segment [Member]
Loans in nonaccrual status	31,727	27,935
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans in nonaccrual status	2,242	3,411
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member]
Loans in nonaccrual status	13,431	12,139
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member]
Loans in nonaccrual status	16,054	12,385
Commercial Portfolio Segment [Member]
Loans in nonaccrual status	9,140	9,003
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Loans in nonaccrual status	6,980	7,765
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans in nonaccrual status	$ 2,160	$ 1,238

Note 5 - Loans and Allowance 62

Note 5 - Loans and Allowance for Loan Losses - Age Analysis of Past Due Loans, Excluding Loans Acquired, Segregated by Class of Loans (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Loans	$ 10,780,000,000	$ 5,630,000,000
Loans, Excluding Acquired Loans [Member]
Past Due	46,075,000	40,313,000
Current	5,659,534,000	4,286,894,000
Loans	5,705,609,000	4,327,207,000
90 Days Past Due & Accruing	343,000	300,000
Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	18,159,000	18,605,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	27,916,000	21,708,000
Consumer Portfolio Segment [Member]
Loans	465,516,000	488,563,000
Consumer Portfolio Segment [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	9,686,000	5,804,000
Current	455,830,000	482,759,000
Loans	465,516,000	488,563,000
90 Days Past Due & Accruing	342,000	286,000
Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	5,716,000	4,502,000
Consumer Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	3,970,000	1,302,000
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member]
Loans	185,422,000	184,591,000
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	1,379,000	991,000
Current	184,043,000	183,600,000
Loans	185,422,000	184,591,000
90 Days Past Due & Accruing	332,000	275,000
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	707,000	716,000
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	672,000	275,000
Consumer Portfolio Segment [Member] | Other Loans [Member]
Loans	280,094,000	303,972,000
Consumer Portfolio Segment [Member] | Other Loans [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	8,307,000	4,813,000
Current	271,787,000	299,159,000
Loans	280,094,000	303,972,000
90 Days Past Due & Accruing	10,000	11,000
Consumer Portfolio Segment [Member] | Other Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	5,009,000	3,786,000
Consumer Portfolio Segment [Member] | Other Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	3,298,000	1,027,000
Commercial Real Estate Portfolio Segment [Member]
Loans	4,239,612,000	3,028,079,000
Commercial Real Estate Portfolio Segment [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	26,571,000	25,837,000
Current	4,213,041,000	3,002,242,000
Loans	4,239,612,000	3,028,079,000
90 Days Past Due & Accruing	1,000	14,000
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	10,870,000	11,942,000
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	15,701,000	13,895,000
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans	614,155,000	336,759,000
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	1,621,000	2,666,000
Current	612,534,000	334,093,000
Loans	614,155,000	336,759,000
90 Days Past Due & Accruing
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	411,000	1,420,000
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	1,210,000	1,246,000
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member]
Loans	1,094,633,000	904,245,000
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	14,531,000	12,237,000
Current	1,080,102,000	892,008,000
Loans	1,094,633,000	904,245,000
90 Days Past Due & Accruing	1,000	14,000
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	8,071,000	6,310,000
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	6,460,000	5,927,000
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member]
Loans	2,530,824,000	1,787,075,000
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	10,419,000	10,934,000
Current	2,520,405,000	1,776,141,000
Loans	2,530,824,000	1,787,075,000
90 Days Past Due & Accruing
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	2,388,000	4,212,000
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	8,031,000	6,722,000
Commercial Portfolio Segment [Member]
Loans	973,519,000	789,903,000
Commercial Portfolio Segment [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	9,818,000	8,672,000
Current	963,701,000	781,231,000
Loans	973,519,000	789,903,000
90 Days Past Due & Accruing
Commercial Portfolio Segment [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	1,573,000	2,161,000
Commercial Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	8,245,000	6,511,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Loans	825,217,000	639,525,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	7,648,000	7,336,000
Current	817,569,000	632,189,000
Loans	825,217,000	639,525,000
90 Days Past Due & Accruing
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	1,523,000	2,040,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	6,125,000	5,296,000
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans	148,302,000	150,378,000
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	2,170,000	1,336,000
Current	146,132,000	149,042,000
Loans	148,302,000	150,378,000
90 Days Past Due & Accruing
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	50,000	121,000
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due	2,120,000	1,215,000
Unallocated Financing Receivables [Member]
Loans	26,962,000	20,662,000
Unallocated Financing Receivables [Member] | Loans, Excluding Acquired Loans [Member]
Past Due
Current	26,962,000	20,662,000
Loans	26,962,000	20,662,000
90 Days Past Due & Accruing
Unallocated Financing Receivables [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due
Unallocated Financing Receivables [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member]
Past Due

Note 5 - Loans and Allowance 63

Note 5 - Loans and Allowance for Loan Losses - Impaired Loans, Net of Government Guarantees and Excluding Loans Acquired, Segregated by Class of Loans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Unpaid Contractual Principal Balance	$ 57,334,000	$ 54,521,000
Recorded Investment With No Allowance	30,920,000	24,678,000
Recorded Investment With Allowance	13,003,000	19,018,000
Impaired Financing Receivable, Recorded Investment	43,923,000	43,696,000
Impaired Financing Receivable, Related Allowance	338,000	680,000
Average Investment in Impaired Loans	50,788,000	35,978,000	$ 16,700,000
Interest Income Recognized	1,780,000	1,593,000	$ 1,200,000
Consumer Portfolio Segment [Member]
Unpaid Contractual Principal Balance	4,925,000	2,209,000
Recorded Investment With No Allowance	4,775,000	2,170,000
Recorded Investment With Allowance		3,000
Impaired Financing Receivable, Recorded Investment	4,775,000	2,173,000
Impaired Financing Receivable, Related Allowance		1,000
Average Investment in Impaired Loans	3,357,000	1,412,000
Interest Income Recognized	153,000	67,000
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member]
Unpaid Contractual Principal Balance	170,000	373,000
Recorded Investment With No Allowance	170,000	373,000
Recorded Investment With Allowance
Impaired Financing Receivable, Recorded Investment	170,000	373,000
Impaired Financing Receivable, Related Allowance
Average Investment in Impaired Loans	268,000	346,000
Interest Income Recognized	47,000	20,000
Consumer Portfolio Segment [Member] | Other Loans [Member]
Unpaid Contractual Principal Balance	4,755,000	1,836,000
Recorded Investment With No Allowance	4,605,000	1,797,000
Recorded Investment With Allowance		3,000
Impaired Financing Receivable, Recorded Investment	4,605,000	1,800,000
Impaired Financing Receivable, Related Allowance		1,000
Average Investment in Impaired Loans	3,089,000	1,066,000
Interest Income Recognized	106,000	47,000
Commercial Real Estate Portfolio Segment [Member]
Unpaid Contractual Principal Balance	39,177,000	38,238,000
Recorded Investment With No Allowance	20,804,000	18,559,000
Recorded Investment With Allowance	10,734,000	11,442,000
Impaired Financing Receivable, Recorded Investment	31,538,000	30,001,000
Impaired Financing Receivable, Related Allowance	338,000	417,000
Average Investment in Impaired Loans	34,239,000	28,854,000
Interest Income Recognized	1,175,000	1,274,000
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Unpaid Contractual Principal Balance	2,522,000	4,275,000
Recorded Investment With No Allowance	1,347,000	1,038,000
Recorded Investment With Allowance	895,000	2,374,000
Impaired Financing Receivable, Recorded Investment	2,242,000	3,412,000
Impaired Financing Receivable, Related Allowance	249,000	156,000
Average Investment in Impaired Loans	2,711,000	4,436,000
Interest Income Recognized	93,000	196,000
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member]
Unpaid Contractual Principal Balance	14,347,000	12,970,000
Recorded Investment With No Allowance	12,725,000	10,630,000
Recorded Investment With Allowance	706,000	1,753,000
Impaired Financing Receivable, Recorded Investment	13,431,000	12,383,000
Impaired Financing Receivable, Related Allowance	53,000	162,000
Average Investment in Impaired Loans	12,904,000	9,486,000
Interest Income Recognized	443,000	419,000
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member]
Unpaid Contractual Principal Balance	22,308,000	20,993,000
Recorded Investment With No Allowance	6,732,000	6,891,000
Recorded Investment With Allowance	9,133,000	7,315,000
Impaired Financing Receivable, Recorded Investment	15,865,000	14,206,000
Impaired Financing Receivable, Related Allowance	36,000	99,000
Average Investment in Impaired Loans	18,624,000	14,932,000
Interest Income Recognized	639,000	659,000
Commercial Portfolio Segment [Member]
Unpaid Contractual Principal Balance	13,232,000	14,074,000
Recorded Investment With No Allowance	5,341,000	3,949,000
Recorded Investment With Allowance	2,269,000	7,573,000
Impaired Financing Receivable, Recorded Investment	7,610,000	11,522,000
Impaired Financing Receivable, Related Allowance		262,000
Average Investment in Impaired Loans	13,192,000	5,712,000
Interest Income Recognized	452,000	252,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Unpaid Contractual Principal Balance	9,954,000	11,848,000
Recorded Investment With No Allowance	4,306,000	2,734,000
Recorded Investment With Allowance	2,269,000	7,573,000
Impaired Financing Receivable, Recorded Investment	6,575,000	10,307,000
Impaired Financing Receivable, Related Allowance		262,000
Average Investment in Impaired Loans	11,670,000	4,666,000
Interest Income Recognized	400,000	206,000
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Unpaid Contractual Principal Balance	3,278,000	2,226,000
Recorded Investment With No Allowance	1,035,000	1,215,000
Recorded Investment With Allowance
Impaired Financing Receivable, Recorded Investment	1,035,000	1,215,000
Impaired Financing Receivable, Related Allowance
Average Investment in Impaired Loans	1,522,000	1,046,000
Interest Income Recognized	$ 52,000	$ 46,000

Note 5 - Loans and Allowance 64

Note 5 - Loans and Allowance for Loan Losses - Troubled Debt Restructurings, Excluding Loans Acquired, Segregated by Class of Loans (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Troubled debt, number	16	70
Commercial Real Estate Portfolio Segment [Member]
Troubled debt, number	5	51
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Troubled debt, number	1
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member]
Troubled debt, number	1	23
Commercial Real Estate Portfolio Segment [Member] | Commercial Loans [Member]
Troubled debt, number	11
Commercial Portfolio Segment [Member]
Troubled debt, number	11	17
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Troubled debt, number		17
Consumer Portfolio Segment [Member]
Troubled debt, number		2
Consumer Portfolio Segment [Member] | Other Loans [Member]
Troubled debt, number		2
Loans, Excluding Acquired Loans [Member]
Troubled debt, number	40	79
Troubled debt, balance	$ 12,938	$ 14,174
Loans, Excluding Acquired Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Troubled debt, number	29	58
Troubled debt, balance	$ 9,549	$ 12,091
Loans, Excluding Acquired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Troubled debt, number	1	1
Troubled debt, balance	$ 420	$ 18
Loans, Excluding Acquired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member]
Troubled debt, number	19	32
Troubled debt, balance	$ 1,095	$ 2,245
Loans, Excluding Acquired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Other Loans [Member]
Troubled debt, number	9	25
Troubled debt, balance	$ 8,034	$ 9,828
Loans, Excluding Acquired Loans [Member] | Commercial Portfolio Segment [Member]
Troubled debt, number	11	20
Troubled debt, balance	$ 3,389	$ 2,080
Loans, Excluding Acquired Loans [Member] | Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Troubled debt, number	11	20
Troubled debt, balance	$ 3,389	$ 2,080
Loans, Excluding Acquired Loans [Member] | Consumer Portfolio Segment [Member]
Troubled debt, number		1
Troubled debt, balance		$ 3
Loans, Excluding Acquired Loans [Member] | Consumer Portfolio Segment [Member] | Other Loans [Member]
Troubled debt, number		1
Troubled debt, balance		$ 3
Loans, Excluding Acquired Loans [Member] | Performing Financial Instruments [Member]
Troubled debt, number	13	41
Troubled debt, balance	$ 7,107	$ 10,998
Loans, Excluding Acquired Loans [Member] | Performing Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member]
Troubled debt, number	8	26
Troubled debt, balance	$ 4,463	$ 9,215
Loans, Excluding Acquired Loans [Member] | Performing Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Troubled debt, number
Troubled debt, balance
Loans, Excluding Acquired Loans [Member] | Performing Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member]
Troubled debt, number	4	3
Troubled debt, balance	$ 141	$ 167
Loans, Excluding Acquired Loans [Member] | Performing Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Other Loans [Member]
Troubled debt, number	4	23
Troubled debt, balance	$ 4,322	$ 9,048
Loans, Excluding Acquired Loans [Member] | Performing Financial Instruments [Member] | Commercial Portfolio Segment [Member]
Troubled debt, number	5	15
Troubled debt, balance	$ 2,644	$ 1,783
Loans, Excluding Acquired Loans [Member] | Performing Financial Instruments [Member] | Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Troubled debt, number	5	15
Troubled debt, balance	$ 2,644	$ 1,783
Loans, Excluding Acquired Loans [Member] | Performing Financial Instruments [Member] | Consumer Portfolio Segment [Member]
Troubled debt, number
Troubled debt, balance
Loans, Excluding Acquired Loans [Member] | Performing Financial Instruments [Member] | Consumer Portfolio Segment [Member] | Other Loans [Member]
Troubled debt, number
Troubled debt, balance
Loans, Excluding Acquired Loans [Member] | Nonperforming Financial Instruments [Member]
Troubled debt, number	27	38
Troubled debt, balance	$ 5,831	$ 3,176
Loans, Excluding Acquired Loans [Member] | Nonperforming Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member]
Troubled debt, number	21	32
Troubled debt, balance	$ 5,086	$ 2,876
Loans, Excluding Acquired Loans [Member] | Nonperforming Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Troubled debt, number	1	1
Troubled debt, balance	$ 420	$ 18
Loans, Excluding Acquired Loans [Member] | Nonperforming Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member]
Troubled debt, number	15	29
Troubled debt, balance	$ 954	$ 2,078
Loans, Excluding Acquired Loans [Member] | Nonperforming Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Other Loans [Member]
Troubled debt, number	5	2
Troubled debt, balance	$ 3,712	$ 780
Loans, Excluding Acquired Loans [Member] | Nonperforming Financial Instruments [Member] | Commercial Portfolio Segment [Member]
Troubled debt, number	6	5
Troubled debt, balance	$ 745	$ 297
Loans, Excluding Acquired Loans [Member] | Nonperforming Financial Instruments [Member] | Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Troubled debt, number	6	5
Troubled debt, balance	$ 745	$ 297
Loans, Excluding Acquired Loans [Member] | Nonperforming Financial Instruments [Member] | Consumer Portfolio Segment [Member]
Troubled debt, number		1
Troubled debt, balance		$ 3
Loans, Excluding Acquired Loans [Member] | Nonperforming Financial Instruments [Member] | Consumer Portfolio Segment [Member] | Other Loans [Member]
Troubled debt, number		1
Troubled debt, balance		$ 3

Note 5 - Loans and Allowance 65

Note 5 - Loans and Allowance for Loan Losses - Loans Restructured as TDRs, Excluding Loans Acquired, Segregated by Class of Loans (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Number of Loans	16	70
Balance Prior to TDR	$ 11,001	$ 13,907
Balance	10,905	13,757
Financial Impact on Date of Restructure	33
Extended Maturity [Member]
Balance	10,866	12,071
Contractual Interest Rate Reduction [Member]
Balance	$ 39	$ 1,686
Commercial Real Estate Portfolio Segment [Member]
Number of Loans	5	51
Balance Prior to TDR	$ 8,310	$ 11,861
Balance	8,301	11,778
Financial Impact on Date of Restructure	33
Commercial Real Estate Portfolio Segment [Member] | Extended Maturity [Member]
Balance	8,301	10,092
Commercial Real Estate Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Balance		$ 1,686
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Number of Loans	1
Balance Prior to TDR	$ 456
Balance	456
Financial Impact on Date of Restructure
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Extended Maturity [Member]
Balance	456
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Contractual Interest Rate Reduction [Member]
Balance
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member]
Number of Loans	1	23
Balance Prior to TDR	$ 139	$ 1,570
Balance	130	1,518
Financial Impact on Date of Restructure
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Extended Maturity [Member]
Balance	130	964
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Contractual Interest Rate Reduction [Member]
Balance		$ 554
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member]
Number of Loans	3	28
Balance Prior to TDR	$ 7,715	$ 10,291
Balance	7,715	10,260
Financial Impact on Date of Restructure	33
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] | Extended Maturity [Member]
Balance	7,715	9,128
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] | Contractual Interest Rate Reduction [Member]
Balance		$ 1,132
Commercial Real Estate Portfolio Segment [Member] | Commercial Loans [Member]
Number of Loans	11
Balance Prior to TDR	$ 2,691
Balance	2,604
Financial Impact on Date of Restructure
Commercial Real Estate Portfolio Segment [Member] | Commercial Loans [Member] | Extended Maturity [Member]
Balance	2,565
Commercial Real Estate Portfolio Segment [Member] | Commercial Loans [Member] | Contractual Interest Rate Reduction [Member]
Balance	$ 39
Commercial Portfolio Segment [Member]
Number of Loans	11	17
Balance Prior to TDR	$ 2,691	$ 1,996
Balance	2,604	1,968
Financial Impact on Date of Restructure
Commercial Portfolio Segment [Member] | Extended Maturity [Member]
Balance	2,565	1,968
Commercial Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Balance	$ 39
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Number of Loans		17
Balance Prior to TDR		$ 1,996
Balance		1,968
Financial Impact on Date of Restructure
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Extended Maturity [Member]
Balance		1,968
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Contractual Interest Rate Reduction [Member]
Balance
Consumer Portfolio Segment [Member]
Number of Loans		2
Balance Prior to TDR		$ 50
Balance		11
Financial Impact on Date of Restructure
Consumer Portfolio Segment [Member] | Extended Maturity [Member]
Balance		11
Consumer Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Balance
Consumer Portfolio Segment [Member] | Other Loans [Member]
Number of Loans		2
Balance Prior to TDR		$ 50
Balance		11
Financial Impact on Date of Restructure
Consumer Portfolio Segment [Member] | Other Loans [Member] | Extended Maturity [Member]
Balance		11
Consumer Portfolio Segment [Member] | Other Loans [Member] | Contractual Interest Rate Reduction [Member]
Balance

Note 5 - Loans and Allowance 66

Note 5 - Loans and Allowance for Loan Losses - Loans by Credit Risk Rating, Segregated by Class of Loans (Details) - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016
Financing Receivables		$ 10,779,685	$ 5,632,890
Loans acquired, net of discount and allowance	[1]	5,074,076	1,305,683
Loans acquired	[1]	5,074,076	1,305,683
Pass [Member]
Financing Receivables		10,302,189	5,433,036
Loans acquired, net of discount and allowance		4,782,384	1,217,886
Loans acquired		4,782,384	1,217,886
Special Mention [Member]
Financing Receivables		301,922	33,865
Loans acquired, net of discount and allowance		198,314	22,181
Loans acquired		198,314	22,181
Substandard [Member]
Financing Receivables		175,064	164,251
Loans acquired, net of discount and allowance		93,378	64,075
Loans acquired		93,378	64,075
Doubtful [Member]
Financing Receivables		376	1,715
Loans acquired, net of discount and allowance			1,541
Loans acquired			1,541
Unlikely to be Collected Financing Receivable [Member]
Financing Receivables		134	23
Loans acquired, net of discount and allowance
Loans acquired
Consumer Portfolio Segment [Member]
Financing Receivables		465,516	488,563
Consumer Portfolio Segment [Member] | Pass [Member]
Financing Receivables		460,080	485,575
Consumer Portfolio Segment [Member] | Special Mention [Member]
Financing Receivables			26
Consumer Portfolio Segment [Member] | Substandard [Member]
Financing Receivables		5,436	2,962
Consumer Portfolio Segment [Member] | Doubtful [Member]
Financing Receivables
Consumer Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]
Financing Receivables
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member]
Financing Receivables		185,422	184,591
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member] | Pass [Member]
Financing Receivables		184,920	183,943
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member] | Special Mention [Member]
Financing Receivables
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member] | Substandard [Member]
Financing Receivables		502	648
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member] | Doubtful [Member]
Financing Receivables
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member] | Unlikely to be Collected Financing Receivable [Member]
Financing Receivables
Consumer Portfolio Segment [Member] | Other Loans [Member]
Financing Receivables		280,094	303,972
Consumer Portfolio Segment [Member] | Other Loans [Member] | Pass [Member]
Financing Receivables		275,160	301,632
Consumer Portfolio Segment [Member] | Other Loans [Member] | Special Mention [Member]
Financing Receivables			26
Consumer Portfolio Segment [Member] | Other Loans [Member] | Substandard [Member]
Financing Receivables		4,934	2,314
Consumer Portfolio Segment [Member] | Other Loans [Member] | Doubtful [Member]
Financing Receivables
Consumer Portfolio Segment [Member] | Other Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Financing Receivables
Commercial Real Estate Portfolio Segment [Member]
Financing Receivables		4,239,612	3,028,079
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Financing Receivables		4,150,321	2,943,890
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Financing Receivables		29,330	10,996
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Financing Receivables		59,658	73,019
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]
Financing Receivables		303	174
Commercial Real Estate Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]
Financing Receivables
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivables		614,155	336,759
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Pass [Member]
Financing Receivables		603,126	330,080
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Special Mention [Member]
Financing Receivables		5,795	98
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Substandard [Member]
Financing Receivables		5,218	6,565
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Doubtful [Member]
Financing Receivables		16	16
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Financing Receivables
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member]
Financing Receivables		1,094,633	904,245
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Pass [Member]
Financing Receivables		1,066,902	875,603
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Special Mention [Member]
Financing Receivables		3,954	4,024
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Substandard [Member]
Financing Receivables		23,490	24,460
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Doubtful [Member]
Financing Receivables		287	158
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Financing Receivables
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member]
Financing Receivables		2,530,824	1,787,075
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] | Pass [Member]
Financing Receivables		2,480,293	1,738,207
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] | Special Mention [Member]
Financing Receivables		19,581	6,874
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] | Substandard [Member]
Financing Receivables		30,950	41,994
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] | Doubtful [Member]
Financing Receivables
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Financing Receivables
Commercial Portfolio Segment [Member]
Financing Receivables		973,519	789,903
Commercial Portfolio Segment [Member] | Pass [Member]
Financing Receivables		882,442	765,023
Commercial Portfolio Segment [Member] | Special Mention [Member]
Financing Receivables		74,278	662
Commercial Portfolio Segment [Member] | Substandard [Member]
Financing Receivables		16,592	24,195
Commercial Portfolio Segment [Member] | Doubtful [Member]
Financing Receivables		73
Commercial Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]
Financing Receivables		134	23
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Financing Receivables		825,217	639,525
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Pass [Member]
Financing Receivables		736,377	616,805
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Special Mention [Member]
Financing Receivables		74,254	558
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Substandard [Member]
Financing Receivables		14,402	22,162
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Doubtful [Member]
Financing Receivables		50
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Financing Receivables		134
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Financing Receivables		148,302	150,378
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Pass [Member]
Financing Receivables		146,065	148,218
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Special Mention [Member]
Financing Receivables		24	104
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Substandard [Member]
Financing Receivables		2,190	2,033
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Doubtful [Member]
Financing Receivables		23
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Financing Receivables			23
Unallocated Financing Receivables [Member]
Financing Receivables		26,962	20,662
Unallocated Financing Receivables [Member] | Pass [Member]
Financing Receivables		26,962	20,662
Unallocated Financing Receivables [Member] | Special Mention [Member]
Financing Receivables
Unallocated Financing Receivables [Member] | Substandard [Member]
Financing Receivables
Unallocated Financing Receivables [Member] | Doubtful [Member]
Financing Receivables
Unallocated Financing Receivables [Member] | Unlikely to be Collected Financing Receivable [Member]
Financing Receivables
[1]	See Note 6, Loans Acquired, for segregation of loans acquired by loan class.

Note 5 - Loans and Allowance 67

Note 5 - Loans and Allowance for Loan Losses - Net (Charge-Offs)/Recoveries, Excluding Loans Acquired, Segregated by Class of Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Loans Receivable	$ (19,145)	$ (14,504)
Consumer Portfolio Segment [Member]
Loans Receivable	(4,412)	(3,747)
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member]
Loans Receivable	(2,884)	(2,288)
Consumer Portfolio Segment [Member] | Other Loans [Member]
Loans Receivable	(1,528)	(1,459)
Commercial Real Estate Portfolio Segment [Member]
Loans Receivable	(6,999)	(7,166)
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans Receivable	100	(16)
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member]
Loans Receivable	(1,045)	(706)
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member]
Loans Receivable	(6,054)	(6,444)
Commercial Portfolio Segment [Member]
Loans Receivable	(7,734)	(3,591)
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Loans Receivable	(7,734)	(1,255)
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans Receivable		$ (2,336)

Note 5 - Loans and Allowance 68

Note 5 - Loans and Allowance for Loan Losses - Activity in the Allowance for Loan Losses, by Portfolio Segment, for the Current Year (Details) - USD ($)		12 Months Ended
		Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Balance, beginning of period		$ 36,286,000
Provision for loan losses		26,393,000		$ 20,065,000		$ 9,022,000
Balance, end of period		41,668,000		36,286,000
Loans, Excluding Acquired Loans [Member]
Balance, beginning of period		36,286,000	[1]	31,351,000	[1]	29,028,000
Provision for loan losses		24,527,000	[2]	19,439,000	[2]	8,286,000
Charge-offs		(23,498,000)		(16,643,000)		(7,774,000)
Recoveries		4,353,000		2,139,000		1,811,000
Net charge-offs		(19,145,000)		(14,504,000)		(5,963,000)
Balance, end of period	[1]	41,668,000		36,286,000		31,351,000
Loans individually evaluated for impairment		338,000		680,000
Loans collectively evaluated for impairment		41,330,000		35,606,000
Commercial Portfolio Segment [Member] | Loans, Excluding Acquired Loans [Member]
Balance, beginning of period		7,739,000	[1]	5,985,000	[1]	6,962,000
Provision for loan losses		7,002,000	[2]	5,345,000	[2]	258,000
Charge-offs		(7,837,000)		(3,956,000)		(1,415,000)
Recoveries		103,000		365,000		180,000
Net charge-offs		(7,734,000)		(3,591,000)		(1,235,000)
Balance, end of period	[1]	7,007,000		7,739,000		5,985,000
Loans individually evaluated for impairment				262,000
Loans collectively evaluated for impairment		7,007,000		7,477,000
Commercial Real Estate Portfolio Segment [Member] | Loans, Excluding Acquired Loans [Member]
Balance, beginning of period		21,817,000	[1]	19,522,000	[1]	15,161,000
Provision for loan losses		12,463,000	[2]	9,461,000	[2]	5,738,000
Charge-offs		(7,989,000)		(7,517,000)		(1,580,000)
Recoveries		990,000		351,000		203,000
Net charge-offs		(6,999,000)		(7,166,000)		(1,377,000)
Balance, end of period	[1]	27,281,000		21,817,000		19,522,000
Loans individually evaluated for impairment		338,000		417,000
Loans collectively evaluated for impairment		26,943,000		21,400,000
Consumer Portfolio Segment [Member] | Loans, Excluding Acquired Loans [Member]
Balance, beginning of period		3,779,000	[1]	3,893,000	[1]	5,445,000
Provision for loan losses		2,889,000	[2]	2,174,000	[2]	665,000
Charge-offs		(3,905,000)		(3,195,000)		(3,107,000)
Recoveries		1,021,000		907,000		890,000
Net charge-offs		(2,884,000)		(2,288,000)		(2,217,000)
Balance, end of period	[1]	3,784,000		3,779,000		3,893,000
Loans individually evaluated for impairment
Loans collectively evaluated for impairment		3,784,000		3,779,000
Unallocated Financing Receivables [Member] | Loans, Excluding Acquired Loans [Member]
Balance, beginning of period		2,951,000	[1]	1,951,000	[1]	1,460,000
Provision for loan losses		2,173,000	[2]	2,459,000	[2]	1,625,000
Charge-offs		(3,767,000)		(1,975,000)		(1,672,000)
Recoveries		2,239,000		516,000		538,000
Net charge-offs		(1,528,000)		(1,459,000)		(1,134,000)
Balance, end of period	[1]	3,596,000		2,951,000		$ 1,951,000
Loans individually evaluated for impairment				1,000
Loans collectively evaluated for impairment		$ 3,596,000		$ 2,950,000
[1]	Allowance for loan losses at December 31, 2017 includes $418,000 allowance for loans acquired (not shown in the table above). Allowance for loan losses at December 31, 2016 and 2015 includes $954,000 allowance for loans acquired. The total allowance for loan losses at December 31, 2017, 2016 and 2015 was $42,086,000, $37,240,000 and $32,305,000, respectively.
[2]	Provision for loan losses of $1,866,000 attributable to loans acquired was excluded from this table for the year ended December 31, 2017 (total provision for loan losses for the year ended December 31, 2017 was $26,393,000). There was $2.4 million in charge-offs for loans acquired during the year ended December 31, 2017 resulting in an ending balance in the allowance related to loans acquired of $418,000. Provision for loan losses of $626,000 attributable to loans acquired was excluded from this table for the year ended December 31, 2016 (total provision for loan losses for the year ended December 31, 2016 was $20,065,000). The $626,000 was subsequently charged-off, resulting in no increase to the ending balance in the allowance related to loans acquired.

Note 5 - Loans and Allowance 69

Note 5 - Loans and Allowance for Loan Losses - Recorded Investment in Loans, Excluding Loans Acquired (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Balance, end of period	$ 10,779,685	$ 5,632,890
Commercial Portfolio Segment [Member]
Balance, end of period	973,519	789,903
Commercial Real Estate Portfolio Segment [Member]
Balance, end of period	4,239,612	3,028,079
Consumer Portfolio Segment [Member]
Balance, end of period	465,516	488,563
Unallocated Financing Receivables [Member]
Balance, end of period	26,962	20,662
Loans, Excluding Acquired Loans [Member]
Loans individually evaluated for impairment	43,923	43,696
Loans collectively evaluated for impairment	5,661,686	4,283,511
Balance, end of period	5,705,609	4,327,207
Loans, Excluding Acquired Loans [Member] | Commercial Portfolio Segment [Member]
Loans individually evaluated for impairment	7,610	11,522
Loans collectively evaluated for impairment	965,909	778,381
Balance, end of period	973,519	789,903
Loans, Excluding Acquired Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans individually evaluated for impairment	31,538	30,001
Loans collectively evaluated for impairment	4,208,074	2,998,078
Balance, end of period	4,239,612	3,028,079
Loans, Excluding Acquired Loans [Member] | Consumer Portfolio Segment [Member]
Loans individually evaluated for impairment	170	373
Loans collectively evaluated for impairment	185,252	184,218
Balance, end of period	185,422	184,591
Loans, Excluding Acquired Loans [Member] | Unallocated Financing Receivables [Member]
Loans individually evaluated for impairment	4,605	1,800
Loans collectively evaluated for impairment	302,451	322,834
Balance, end of period	$ 307,056	$ 324,634

Note 6 - Loans Acquired (Detail

Note 6 - Loans Acquired (Details Textual) - USD ($)	Sep. 15, 2015	Sep. 30, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jun. 30, 2017	Sep. 30, 2016	Mar. 31, 2015
FDIC Indemnification Asset, Cash Payments Received	$ 2,368,000	$ 2,368,000
Gain (Loss) on Contract Termination	$ (7,476,000)	$ (7,476,000)			$ (7,476,000)
Non Covered Impaired Loans Allowance Reclassified					954,000
Covered Purchased Impaired Loans Allowance			418,000	954,000	$ 954,000
FDIC Indemnification Asset, Accretion of Discount			0	0
Acquired Loans [Member]
Non Covered Impaired Loans Allowance Reclassified			418,000	$ 954,000
OKSB Merger [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Net			1,985,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Gross			2,021,000,000
Loans Acquired Discount			36,300,000
OKSB Merger [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Net			11,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Gross			18,100,000
Loans Acquired Discount			6,700,000
First Texas Merger [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Net			2,208,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Gross			2,246,000,000
Loans Acquired Discount			$ 37,800,000
Hardeman County Investment Company, Inc. [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Net						$ 249,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Gross						254,200,000
Loans Acquired Discount						5,000,000
Hardeman County Investment Company, Inc. [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Net						2,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Gross						3,400,000
Loans Acquired Discount						$ 990,000
Citizens National Bank [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Net							$ 340,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Gross							348,800,000
Loans Acquired Discount							8,700,000
Citizens National Bank [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Net							757,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Gross							1,600,000
Loans Acquired Discount							$ 848,000
Liberty Bancshares, Inc. [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Net								$ 769,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Gross								774,800,000
Loans Acquired Discount								4,900,000
Liberty Bancshares, Inc. [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Net								10,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Gross								15,700,000
Loans Acquired Discount								5,000,000
Community First Bancshares Inc [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Net								1,130,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Gross								1,150,000,000
Loans Acquired Discount								23,700,000
Community First Bancshares Inc [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Net								7,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Gross								10,100,000
Loans Acquired Discount								$ 3,100,000

Note 6 - Loans Acquired - Carry

Note 6 - Loans Acquired - Carrying Value of all Acquired Impaired Loans (Details) - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016
Acquired loans	[1]	$ 5,074,076	$ 1,305,683
Acquired loans	[1]	5,074,076	1,305,683
Consumer Portfolio Segment [Member]
Acquired loans		51,467	49,677
Acquired loans		51,467	49,677
Commercial Real Estate Portfolio Segment [Member]
Acquired loans		3,818,037	1,170,871
Acquired loans		3,818,037	1,170,871
Commercial Portfolio Segment [Member]
Acquired loans		1,062,163	85,135
Acquired loans		1,062,163	85,135
Unallocated Financing Receivables [Member]
Acquired loans		142,409
Acquired loans		142,409
Other Loans [Member] | Consumer Portfolio Segment [Member]
Acquired loans		51,467	49,677
Acquired loans		51,467	49,677
Other Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Acquired loans		2,387,777	690,108
Acquired loans		2,387,777	690,108
Construction Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Acquired loans		637,032	57,587
Acquired loans		637,032	57,587
Single Family Residential Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Acquired loans		793,228	423,176
Acquired loans		793,228	423,176
Commercial Loans [Member] | Commercial Portfolio Segment [Member]
Acquired loans		995,587	81,837
Acquired loans		995,587	81,837
Agricultural Loans [Member] | Commercial Portfolio Segment [Member]
Acquired loans		66,576	3,298
Acquired loans		$ 66,576	$ 3,298
[1]	Loans acquired are reported net of a $418,000 and $954,000 allowance as of December 31, 2017 and 2016, respectively.

Note 6 - Loans Acquired - Nonac

Note 6 - Loans Acquired - Nonaccrual Acquired Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Loans in nonaccrual status	$ 45,642	$ 39,104
Acquired Loans [Member]
Loans in nonaccrual status	23,485	46,832
Consumer Portfolio Segment [Member]
Loans in nonaccrual status	4,775	2,166
Consumer Portfolio Segment [Member] | Other Loans [Member]
Loans in nonaccrual status	4,605	1,793
Consumer Portfolio Segment [Member] | Acquired Loans [Member]
Loans in nonaccrual status	334	456
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member]
Loans in nonaccrual status	334	456
Commercial Real Estate Portfolio Segment [Member]
Loans in nonaccrual status	31,727	27,935
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans in nonaccrual status	2,242	3,411
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member]
Loans in nonaccrual status	13,431	12,139
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member]
Loans in nonaccrual status	16,054	12,385
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member]
Loans in nonaccrual status	21,319	43,372
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member]
Loans in nonaccrual status	1,767	7,961
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member]
Loans in nonaccrual status	12,151	13,366
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Commercial Loans [Member]
Loans in nonaccrual status	7,401	22,045
Commercial Portfolio Segment [Member]
Loans in nonaccrual status	9,140	9,003
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Loans in nonaccrual status	6,980	7,765
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans in nonaccrual status	2,160	1,238
Commercial Portfolio Segment [Member] | Acquired Loans [Member]
Loans in nonaccrual status	1,832	3,004
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member]
Loans in nonaccrual status	1,748	2,806
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member]
Loans in nonaccrual status	$ 84	$ 198

Note 6 - Loans Acquired - Age A

Note 6 - Loans Acquired - Age Analysis of Past Due Acquired Loans, Excluding Loans Covered by Loss Share (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Loans	$ 10,780,000,000	$ 5,630,000,000
Acquired Loans [Member]
Past Due	47,684,000	37,940,000
Current	5,026,392,000	1,267,743,000
Loans	5,074,076,000	1,305,683,000
90 Days Past Due & Accruing	3,145,000	11,000
Acquired Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Past Due	35,988,000	12,668,000
Acquired Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Past Due	11,696,000	25,272,000
Consumer Portfolio Segment [Member]
Loans	465,516,000	488,563,000
Consumer Portfolio Segment [Member] | Other Loans [Member]
Loans	280,094,000	303,972,000
Consumer Portfolio Segment [Member] | Acquired Loans [Member]
Past Due	1,149,000	760,000
Current	50,318,000	48,917,000
Loans	51,467,000	49,677,000
90 Days Past Due & Accruing	108,000
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Past Due	889,000	571,000
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Past Due	260,000	189,000
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member]
Past Due	1,149,000	760,000
Current	50,318,000	48,917,000
Loans	51,467,000	49,677,000
90 Days Past Due & Accruing	108,000
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Past Due	889,000	571,000
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Past Due	260,000	189,000
Commercial Real Estate Portfolio Segment [Member]
Loans	4,239,612,000	3,028,079,000
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans	614,155,000	336,759,000
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member]
Loans	1,094,633,000	904,245,000
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member]
Past Due	43,086,000	34,256,000
Current	3,774,951,000	1,136,615,000
Loans	3,818,037,000	1,170,871,000
90 Days Past Due & Accruing	2,970,000	11,000
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Past Due	32,689,000	11,326,000
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Past Due	10,397,000	22,930,000
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member]
Past Due	22,823,000	13,577,000
Current	2,364,954,000	676,531,000
Loans	2,387,777,000	690,108,000
90 Days Past Due & Accruing	2,565,000
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Past Due	17,176,000	2,836,000
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Past Due	5,647,000	10,741,000
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member]
Past Due	4,025,000	7,464,000
Current	633,007,000	50,123,000
Loans	637,032,000	57,587,000
90 Days Past Due & Accruing	279,000
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Past Due	2,577,000	132,000
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Past Due	1,448,000	7,332,000
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member]
Past Due	16,238,000	13,215,000
Current	776,990,000	409,961,000
Loans	793,228,000	423,176,000
90 Days Past Due & Accruing	126,000	11,000
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Past Due	12,936,000	8,358,000
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Past Due	3,302,000	4,857,000
Commercial Portfolio Segment [Member]
Loans	973,519,000	789,903,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Loans	825,217,000	639,525,000
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans	148,302,000	150,378,000
Commercial Portfolio Segment [Member] | Acquired Loans [Member]
Past Due	3,434,000	2,924,000
Current	1,058,729,000	82,211,000
Loans	1,062,163,000	85,135,000
90 Days Past Due & Accruing	67,000
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Past Due	2,395,000	771,000
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Past Due	1,039,000	2,153,000
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member]
Past Due	3,383,000	2,876,000
Current	992,204,000	78,961,000
Loans	995,587,000	81,837,000
90 Days Past Due & Accruing	67,000
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Past Due	2,344,000	723,000
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Past Due	1,039,000	2,153,000
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member]
Past Due	51,000	48,000
Current	66,525,000	3,250,000
Loans	66,576,000	3,298,000
90 Days Past Due & Accruing
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Past Due	51,000	48,000
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Past Due
Unallocated Financing Receivables [Member]
Loans	26,962,000	$ 20,662,000
Unallocated Financing Receivables [Member] | Acquired Loans [Member]
Past Due	15,000
Current	142,394,000
Loans	142,409,000
90 Days Past Due & Accruing
Unallocated Financing Receivables [Member] | Acquired Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Past Due	15,000
Unallocated Financing Receivables [Member] | Acquired Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Past Due

Note 6 - Loans Acquired - Summa

Note 6 - Loans Acquired - Summary of Acquired Loans, Excluding Loans Covered by Loss Share (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Acquired loans	$ 10,779,685	$ 5,632,890
Pass [Member]
Acquired loans	10,302,189	5,433,036
Special Mention [Member]
Acquired loans	301,922	33,865
Substandard [Member]
Acquired loans	175,064	164,251
Doubtful [Member]
Acquired loans	376	1,715
Unlikely to be Collected Financing Receivable [Member]
Acquired loans	134	23
Acquired Loans [Member]
Acquired loans	5,074,076	1,305,683
Acquired Loans [Member] | Pass [Member]
Acquired loans	4,782,384	1,217,886
Acquired Loans [Member] | Special Mention [Member]
Acquired loans	198,314	22,181
Acquired Loans [Member] | Substandard [Member]
Acquired loans	93,378	64,075
Acquired Loans [Member] | Doubtful [Member]
Acquired loans		1,541
Acquired Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Acquired loans
Consumer Portfolio Segment [Member]
Acquired loans	465,516	488,563
Consumer Portfolio Segment [Member] | Pass [Member]
Acquired loans	460,080	485,575
Consumer Portfolio Segment [Member] | Special Mention [Member]
Acquired loans		26
Consumer Portfolio Segment [Member] | Substandard [Member]
Acquired loans	5,436	2,962
Consumer Portfolio Segment [Member] | Doubtful [Member]
Acquired loans
Consumer Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]
Acquired loans
Consumer Portfolio Segment [Member] | Other Loans [Member]
Acquired loans	280,094	303,972
Consumer Portfolio Segment [Member] | Other Loans [Member] | Pass [Member]
Acquired loans	275,160	301,632
Consumer Portfolio Segment [Member] | Other Loans [Member] | Special Mention [Member]
Acquired loans		26
Consumer Portfolio Segment [Member] | Other Loans [Member] | Substandard [Member]
Acquired loans	4,934	2,314
Consumer Portfolio Segment [Member] | Other Loans [Member] | Doubtful [Member]
Acquired loans
Consumer Portfolio Segment [Member] | Other Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Acquired loans
Consumer Portfolio Segment [Member] | Acquired Loans [Member]
Acquired loans		49,677
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Pass [Member]
Acquired loans		48,992
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Special Mention [Member]
Acquired loans		14
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Substandard [Member]
Acquired loans		671
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Doubtful [Member]
Acquired loans
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Acquired loans
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member]
Acquired loans	51,467	49,677
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Pass [Member]
Acquired loans	50,625	48,992
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Special Mention [Member]
Acquired loans	21	14
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Substandard [Member]
Acquired loans	821	671
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Doubtful [Member]
Acquired loans
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Acquired loans
Commercial Real Estate Portfolio Segment [Member]
Acquired loans	4,239,612	3,028,079
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Acquired loans	4,150,321	2,943,890
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Acquired loans	29,330	10,996
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Acquired loans	59,658	73,019
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]
Acquired loans	303	174
Commercial Real Estate Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]
Acquired loans
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Acquired loans	614,155	336,759
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Pass [Member]
Acquired loans	603,126	330,080
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Special Mention [Member]
Acquired loans	5,795	98
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Substandard [Member]
Acquired loans	5,218	6,565
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Doubtful [Member]
Acquired loans	16	16
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Acquired loans
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member]
Acquired loans	1,094,633	904,245
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Pass [Member]
Acquired loans	1,066,902	875,603
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Special Mention [Member]
Acquired loans	3,954	4,024
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Substandard [Member]
Acquired loans	23,490	24,460
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Doubtful [Member]
Acquired loans	287	158
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Acquired loans
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member]
Acquired loans	3,818,037	1,170,871
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Pass [Member]
Acquired loans	3,576,661	1,092,275
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Special Mention [Member]
Acquired loans	184,392	20,168
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Substandard [Member]
Acquired loans	56,984	56,893
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Doubtful [Member]
Acquired loans		1,535
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Acquired loans
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member]
Acquired loans	2,387,777	690,108
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Pass [Member]
Acquired loans	2,337,097	641,018
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Special Mention [Member]
Acquired loans	15,064	17,384
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Substandard [Member]
Acquired loans	35,616	31,706
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Doubtful [Member]
Acquired loans
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Acquired loans
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member]
Acquired loans	637,032	57,587
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member] | Pass [Member]
Acquired loans	468,610	50,704
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member] | Special Mention [Member]
Acquired loans	166,710	88
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member] | Substandard [Member]
Acquired loans	1,712	6,795
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member] | Doubtful [Member]
Acquired loans
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Acquired loans
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member]
Acquired loans	793,228	423,176
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member] | Pass [Member]
Acquired loans	770,954	400,553
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member] | Special Mention [Member]
Acquired loans	2,618	2,696
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member] | Substandard [Member]
Acquired loans	19,656	18,392
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member] | Doubtful [Member]
Acquired loans		1,535
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Acquired loans
Commercial Portfolio Segment [Member]
Acquired loans	973,519	789,903
Commercial Portfolio Segment [Member] | Pass [Member]
Acquired loans	882,442	765,023
Commercial Portfolio Segment [Member] | Special Mention [Member]
Acquired loans	74,278	662
Commercial Portfolio Segment [Member] | Substandard [Member]
Acquired loans	16,592	24,195
Commercial Portfolio Segment [Member] | Doubtful [Member]
Acquired loans	73
Commercial Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]
Acquired loans	134	23
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Acquired loans	825,217	639,525
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Pass [Member]
Acquired loans	736,377	616,805
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Special Mention [Member]
Acquired loans	74,254	558
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Substandard [Member]
Acquired loans	14,402	22,162
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Doubtful [Member]
Acquired loans	50
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Acquired loans	134
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Acquired loans	148,302	150,378
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Pass [Member]
Acquired loans	146,065	148,218
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Special Mention [Member]
Acquired loans	24	104
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Substandard [Member]
Acquired loans	2,190	2,033
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Doubtful [Member]
Acquired loans	23
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Acquired loans		23
Commercial Portfolio Segment [Member] | Acquired Loans [Member]
Acquired loans	1,062,163	85,135
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Pass [Member]
Acquired loans	1,012,689	76,619
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Special Mention [Member]
Acquired loans	13,901	1,999
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Substandard [Member]
Acquired loans	35,573	6,511
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Doubtful [Member]
Acquired loans		6
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Acquired loans
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member]
Acquired loans	995,587	81,837
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member] | Pass [Member]
Acquired loans	946,322	73,609
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member] | Special Mention [Member]
Acquired loans	13,901	1,965
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member] | Substandard [Member]
Acquired loans	35,364	6,257
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member] | Doubtful [Member]
Acquired loans		6
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Acquired loans
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member]
Acquired loans	66,576	3,298
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member] | Pass [Member]
Acquired loans	66,367	3,010
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member] | Special Mention [Member]
Acquired loans		34
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member] | Substandard [Member]
Acquired loans	209	254
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member] | Doubtful [Member]
Acquired loans
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Acquired loans
Unallocated Financing Receivables [Member]
Acquired loans	26,962	20,662
Unallocated Financing Receivables [Member] | Pass [Member]
Acquired loans	26,962	20,662
Unallocated Financing Receivables [Member] | Special Mention [Member]
Acquired loans
Unallocated Financing Receivables [Member] | Substandard [Member]
Acquired loans
Unallocated Financing Receivables [Member] | Doubtful [Member]
Acquired loans
Unallocated Financing Receivables [Member] | Unlikely to be Collected Financing Receivable [Member]
Acquired loans
Unallocated Financing Receivables [Member] | Acquired Loans [Member]
Acquired loans	142,409
Unallocated Financing Receivables [Member] | Acquired Loans [Member] | Pass [Member]
Acquired loans	142,409
Unallocated Financing Receivables [Member] | Acquired Loans [Member] | Special Mention [Member]
Acquired loans
Unallocated Financing Receivables [Member] | Acquired Loans [Member] | Substandard [Member]
Acquired loans
Unallocated Financing Receivables [Member] | Acquired Loans [Member] | Doubtful [Member]
Acquired loans
Unallocated Financing Receivables [Member] | Acquired Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Acquired loans

Note 6 - Loans Acquired - Sum75

Note 6 - Loans Acquired - Summary of the Non-covered Impaired Loans Acquired in Acquisitions - Loans Acquired, Not Covered By FDIC Loss Share (Details) - Loans Acquired, Not Covered By FDIC Loss Share [Member] - USD ($) $ in Thousands	Oct. 19, 2017	May 15, 2017	Sep. 09, 2016	Feb. 27, 2015
OKSB Merger [Member]
Contractually required principal and interest at acquisition	$ 2,021,388
Non-accretable difference (expected losses and foregone interest)
Cash flows expected to be collected at acquisition	2,021,388
Accretable yield	(36,340)
Basis in acquired loans at acquisition	1,985,048
OKSB Merger [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Contractually required principal and interest at acquisition	18,136
Non-accretable difference (expected losses and foregone interest)	(6,731)
Cash flows expected to be collected at acquisition	11,405
Accretable yield
Basis in acquired loans at acquisition	11,405
First Texas Merger [Member]
Contractually required principal and interest at acquisition	2,246,212
Non-accretable difference (expected losses and foregone interest)
Cash flows expected to be collected at acquisition	2,246,212
Accretable yield	(37,834)
Basis in acquired loans at acquisition	2,208,378
First Texas Merger [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Contractually required principal and interest at acquisition
Non-accretable difference (expected losses and foregone interest)
Cash flows expected to be collected at acquisition
Accretable yield
Basis in acquired loans at acquisition
Hardeman County Investment Company, Inc. [Member]
Contractually required principal and interest at acquisition		$ 254,189
Non-accretable difference (expected losses and foregone interest)
Cash flows expected to be collected at acquisition		254,189
Accretable yield		(5,002)
Basis in acquired loans at acquisition		249,187
Hardeman County Investment Company, Inc. [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Contractually required principal and interest at acquisition		3,452
Non-accretable difference (expected losses and foregone interest)		(990)
Cash flows expected to be collected at acquisition		2,462
Accretable yield
Basis in acquired loans at acquisition		$ 2,462
Citizens National Bank [Member]
Contractually required principal and interest at acquisition			$ 348,756
Non-accretable difference (expected losses and foregone interest)
Cash flows expected to be collected at acquisition			348,756
Accretable yield			(8,663)
Basis in acquired loans at acquisition			340,093
Citizens National Bank [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Contractually required principal and interest at acquisition			1,605
Non-accretable difference (expected losses and foregone interest)			(848)
Cash flows expected to be collected at acquisition			757
Accretable yield
Basis in acquired loans at acquisition			$ 757
Liberty Bancshares, Inc. [Member]
Contractually required principal and interest at acquisition				$ 774,777
Non-accretable difference (expected losses and foregone interest)
Cash flows expected to be collected at acquisition				774,777
Accretable yield				(4,869)
Basis in acquired loans at acquisition				769,908
Liberty Bancshares, Inc. [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Contractually required principal and interest at acquisition				15,716
Non-accretable difference (expected losses and foregone interest)				(4,978)
Cash flows expected to be collected at acquisition				10,738
Accretable yield				12
Basis in acquired loans at acquisition				10,750
Community First Bancshares Inc [Member]
Contractually required principal and interest at acquisition				1,153,255
Non-accretable difference (expected losses and foregone interest)
Cash flows expected to be collected at acquisition				1,153,255
Accretable yield				(23,712)
Basis in acquired loans at acquisition				1,129,543
Community First Bancshares Inc [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Contractually required principal and interest at acquisition				10,143
Non-accretable difference (expected losses and foregone interest)				(3,247)
Cash flows expected to be collected at acquisition				6,896
Accretable yield				104
Basis in acquired loans at acquisition				$ 7,000

Note 6 - Loans Acquired - Impac

Note 6 - Loans Acquired - Impact of the Adjustments on the Company's Financial Results for the Following Reporting Periods (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Impact on net interest income		$ 4,105	$ 3,072	$ 19,995
Non-interest income (1)	[1]			(7,719)
Net impact to pre-tax income		4,105	3,072	12,276
Net impact, net of taxes		$ 2,495	$ 1,867	$ 7,461
[1]	Negative non-interest income resulted from the amortization of the FDIC indemnification assets. Because the Company’s loss share agreements with the FDIC have been terminated, there will be no further indemnification asset amortization.

Note 6 - Loans Acquired - Chang

Note 6 - Loans Acquired - Changes in the Carrying Amount of the Accretable Yield for All Purchased Impaired and Non-impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Balance, accretable yield	$ 1,655	$ 954	$ 20,635
Additions, accretable yield		19	(116)
Accretable yield adjustments, accretable yield	4,893	5,122	6,593
Accretion, accretable yield	(5,928)	(4,440)	(21,038)
Payments and other reductions, net, accretable yield			(5,120)
Balance, accretable yield	620	1,655	954
Balance, carrying amount of loans	17,802	23,469	169,098
Additions, carrying amount of loans	13,793	757	17,750
Accretion, carrying amount of loans	5,928	4,440	21,038
Payments and other reductions, net, carrying amount of loans	(20,407)	(10,864)	(184,417)
Balance, carrying amount of loans	$ 17,116	$ 17,802	$ 23,469

Note 6 - Loans Acquired - Sum78

Note 6 - Loans Acquired - Summary of the Changes in the FDIC True-Up Provision (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)
Balance	$ 8,308
Amortization expense	107
Adjustments related to changes in expected losses	720
Loss share termination agreement	(9,135)
Balance

Note 7 - Goodwill and Other I79

Note 7 - Goodwill and Other Intangible Assets (Details Textual) - USD ($)	3 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Oct. 19, 2017	May 15, 2017	Sep. 09, 2016	Oct. 29, 2015	Feb. 27, 2015
Goodwill			$ 842,651,000	$ 348,505,000
Goodwill, Written off Related to Sale of Business Unit	$ 4,100,000
Finite-Lived Intangible Assets, Period Increase (Decrease)	$ (1,300,000)
Amortization of Intangible Assets			$ 7,668,000	5,945,000	$ 4,889,000
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life			10 years
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life			15 years
Core Deposit Premium [Member]
Amortization of Intangible Assets			$ 6,000,000	4,400,000	3,900,000
Core Deposit Premium [Member] | Salina Banking Operations [Member]
Decrease in Intangible Assets from The Sale of Business		$ 382,000
Core Deposit Premium [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life			10 years
Core Deposit Premium [Member] | Maximum [Member]
Finite-Lived Intangible Asset, Useful Life			15 years
Books of Business Intangible [Member]
Amortization of Intangible Assets			$ 1,100,000	1,100,000	528,000
Purchased Credit Card Relationships [Member]
Amortization of Intangible Assets			414,000	414,000	414,000
OKSB Merger [Member]
Goodwill						$ 228,932,000
OKSB Merger [Member] | Core Deposit Premium [Member]
Finite-lived Intangible Assets Acquired			42,100,000
OKSB Merger [Member] | Other Intangible Assets [Member]
Finite-lived Intangible Assets Acquired			3,800,000
First Texas BHC, Inc. [Member]
Goodwill						$ 238,000,000
First Texas BHC, Inc. [Member] | Core Deposit Premium [Member]
Finite-lived Intangible Assets Acquired			7,300,000
Hardeman County Investment Company, Inc. [Member]
Goodwill							$ 29,371,000
Finite-lived Intangible Assets Acquired			830,000
Hardeman County Investment Company, Inc. [Member] | Core Deposit Premium [Member]
Finite-lived Intangible Assets Acquired			$ 7,800,000
Citizens National Bank [Member]
Goodwill								$ 23,376,000
Finite-lived Intangible Assets Acquired				591,000
Citizens National Bank [Member] | Core Deposit Premium [Member]
Finite-lived Intangible Assets Acquired				$ 5,100,000
Liberty Bancshares, Inc. [Member]
Goodwill										$ 95,207,000
Liberty Bancshares, Inc. [Member] | Core Deposit Premium [Member]
Finite-lived Intangible Assets Acquired					14,600,000
Community First Bancshares Inc [Member]
Goodwill										$ 110,440,000
Community First Bancshares Inc [Member] | Core Deposit Premium [Member]
Finite-lived Intangible Assets Acquired					11,300,000
Community First Bancshares Inc [Member] | Books of Business Intangible [Member]
Finite-lived Intangible Assets Acquired					420,000
Ozark Trust [Member]
Goodwill									$ 13,300,000
Ozark Trust [Member] | Books of Business Intangible [Member]
Finite-lived Intangible Assets Acquired					$ 9,700,000

Note 7 - Goodwill and Other I80

Note 7 - Goodwill and Other Intangible Assets - Goodwill, Core Deposit Premiums and Purchased Credit Card Relationships (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Goodwill	$ 842,651	$ 348,505
Intangible assets, net	106,071	52,959
Total goodwill and other intangible assets	948,722	401,464
Core Deposit Premium [Member]
Gross carrying amount	105,984	48,692
Accumulated amortization	(16,659)	(10,625)
Intangible assets, net	89,325	38,067
Books of Business Intangible [Member]
Gross carrying amount	15,414	15,884
Accumulated amortization	(2,827)	(1,716)
Intangible assets, net	12,587	14,168
Other Intangible Assets [Member]
Gross carrying amount	6,037	2,068
Accumulated amortization	(1,878)	(1,344)
Intangible assets, net	$ 4,159	$ 724

Note 7 - Goodwill and Other I81

Note 7 - Goodwill and Other Intangible Assets - Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
2,018	$ 11,355
2,019	11,045
2,020	11,032
2,021	10,970
2,022	10,918
Thereafter	50,751
Total	$ 106,071	$ 52,959

Note 8 - Time Deposits (Details

Note 8 - Time Deposits (Details Textual) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Time Deposits, $100,000 or More	$ 735,970,000	$ 600,280,000
Time Deposits, at or Above FDIC Insurance Limit	396,771,000	193,596,000
Interest-bearing Domestic Deposit, Brokered	159,586,000	$ 7,040,000
Time Deposit Maturities, Next Twelve Months	966,158,000
Time Deposit Maturities, Year Two	660,371,000
Time Deposit Maturities, Year Three	170,969,000
Time Deposit Maturities, Year Four	75,599,000
Time Deposit Maturities, Year Five	$ 59,633,000

Note 9 - Income Taxes (Details

Note 9 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			35.00%	35.00%	35.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability			$ 11,500
Stockholders' Equity, Effects of Tax Law Changes
Earliest Tax Year [Member] | Domestic Tax Authority [Member]
Open Tax Year			2,014
Earliest Tax Year [Member] | State and Local Jurisdiction [Member]
Open Tax Year			2,014
Metropolitan [Member]
Operating Loss Carryforwards	$ 35,600		$ 35,600
Retained Earnings [Member]
Stockholders' Equity, Effects of Tax Law Changes			$ 3,016
Retained Earnings [Member] | New Accounting Pronouncement, Early Adoption, Effect [Member]
Stockholders' Equity, Effects of Tax Law Changes	$ 3,000
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%

Note 9 - Income Taxes - Provisi

Note 9 - Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income taxes currently payable	$ 38,732	$ 36,792	$ 19,301
Deferred income taxes	23,251	9,832	13,599
Provision for income taxes	$ 61,983	$ 46,624	$ 32,900

Note 9 - Income Taxes - Tax Eff

Note 9 - Income Taxes - Tax Effects of Temporary Differences Related to Deferred Taxes Included in Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Loans acquired	$ 19,885	$ 7,986
Allowance for loan losses	10,773	14,754
Valuation of foreclosed assets	2,852	3,958
Tax NOLs from acquisition	7,821	13,077
Deferred compensation payable	2,433	2,785
Accrued equity and other compensation	5,302	8,107
Acquired securities	578	1,098
Unrealized loss on available-for-sale securities	6,107	9,559
Other	8,813	7,101
Gross deferred tax assets	64,564	68,425
Deferred tax liabilities:
Goodwill and other intangible amortization	(32,572)	(29,601)
Accumulated depreciation	(8,945)	(5,370)
Other	(4,413)	(5,877)
Gross deferred tax liabilities	(45,930)	(40,848)
Net deferred tax asset, included in other assets	$ 18,634	$ 27,577

Note 9 - Income Taxes - Reconci

Note 9 - Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Computed at the statutory rate (35%)	$ 54,223	$ 50,203	$ 37,543
State income taxes, net of federal tax benefit	1,582	2,121	2,097
Discrete items related to ASU 2016-09	(1,480)
Tax exempt interest income	(5,135)	(5,112)	(5,432)
Impact of DTA remeasurement	11,471
Section 382 adjustment			(2,293)
Other differences, net	1,322	(588)	985
Provision for income taxes	$ 61,983	$ 46,624	$ 32,900

Note 9 - Income Taxes - Recon87

Note 9 - Income Taxes - Reconciliation of Income Tax Expense (Details) (Parentheticals)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statutory rate	35.00%	35.00%	35.00%

Note 10 - Securities Sold Und88

Note 10 - Securities Sold Under Agreements to Repurchase (Details Textual) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	$ 122	$ 102.4

Note 10 - Securities Sold Und89

Note 10 - Securities Sold Under Agreements to Repurchase - Contractual Maturity of the Agreements (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Repurchase agreements	$ 122,000	$ 102,400
US Government Agencies Debt Securities [Member]
Repurchase agreements	122,019	102,404
Maturity Overnight [Member] | US Government Agencies Debt Securities [Member]
Repurchase agreements	122,019	101,647
Maturity Less than 30 Days [Member] | US Government Agencies Debt Securities [Member]
Repurchase agreements
Maturity 30 to 90 Days [Member] | US Government Agencies Debt Securities [Member]
Repurchase agreements
Maturity Greater than 90 Days [Member] | US Government Agencies Debt Securities [Member]
Repurchase agreements		$ 757

Note 11 - Other Borrowings an90

Note 11 - Other Borrowings and Subordinated Debentures (Details Textual) - USD ($)	1 Months Ended	12 Months Ended
	Oct. 31, 2015	Dec. 31, 2017	Oct. 31, 2017	Oct. 19, 2017	May 15, 2017
Debt Instrument, Face Amount	$ 52,300,000
Debt Instrument, Interest Rate, Stated Percentage	3.85%
Debt Instrument, Term	10 years
Debt Instrument, Periodic Payment Terms, Balloon Payment Term	5 years
Repayments of Long-term Debt	$ 36,000,000
Federal Home Loan Bank, Advances, Maturities Summary, Due in Next Twelve Months		$ 1,100,000,000
Advances from Federal Home Loan Banks		1,300,000,000
Advances from Federal Home Loan Bank Available		2,258,000,000
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged		$ 3,785,000,000
Federal Home Loan Bank Advances [Member]
Debt Instrument, Term		1 year
U.S. Bank National Association [Member] | Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 75,000,000
OKSB and First Texas Acquisitions [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities				$ 75.90
Hardeman County Investment Company, Inc. [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities					$ 419,656,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debentures					$ 6,702,000

Note 11 - Other Borrowings an91

Note 11 - Other Borrowings and Subordinated Debentures - Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Other borrowings	$ 1,380,024	$ 273,159
Subordinated debentures	140,565	60,397
Subordinated Debentures	140,565	60,397
Total other borrowings and subordinated debentures	1,520,589	333,556
U.S. Bank National Association [Member] | Revolving Credit Facility [Member]
Revolving credit agreement, due 10/5/2018, floating rate of 1.50% above the one month LIBOR rate, unsecured	75,000
Federal Home Loan Bank Advances [Member]
FHLB advances, net of discount, due 2018 to 2033, 1.20% to 7.37% secured by residential real estate loans	1,261,642	225,230
Note Payable Due 10/15/2020 [Member]
Notes payable, due 10/15/2020, 3.85%, fixed rate, unsecured	43,382	47,929
Trust Preferred Securities Due 12/30/2033 Floating Rate of 2.8% Above Three Month LIBOR 1 [Member]
Subordinated debentures	20,620	20,620
Subordinated Debentures	20,620	20,620
Trust Preferred Securities Due 6/30/2035 [Member]
Subordinated debentures	9,327	9,225
Subordinated Debentures	9,327	9,225
Trust Preferred Securities Due 9/15/2037 [Member]
Subordinated debentures	10,284	10,130
Subordinated Debentures	10,284	10,130
Trust Preferred Securities Due 12/5/2033 [Member]
Subordinated debentures	5,156	5,161
Subordinated Debentures	5,156	5,161
Trust Preferred Securities Due 10/18/2034 [Member]
Subordinated debentures	5,148	5,105
Subordinated Debentures	5,148	5,105
Trust Preferred Securities, Due 6/6/2037 [Member]
Subordinated debentures	10,288	10,156
Subordinated Debentures	10,288	10,156
Trust Preferred Securities, Due 12/15/2035 [Member]
Subordinated debentures	6,702
Subordinated Debentures	6,702
Trust Preferred Securities, Due 6/26/2033 [Member]
Subordinated debentures	20,619
Subordinated Debentures	20,619
Trust Preferred Securities, Due 10/7/2033 [Member]
Subordinated debentures	25,774
Subordinated Debentures	25,774
Second Trust Preferred Securities Due 9/15/2037 [Member]
Subordinated debentures	8,248
Subordinated Debentures	8,248
Trust Preferred Securities, Due 9/30/2023 [Member]
Subordinated debentures	18,399
Subordinated Debentures	$ 18,399

Note 11 - Other Borrowings an92

Note 11 - Other Borrowings and Subordinated Debentures - Long-term Debt (Details) (Parentheticals)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Oct. 31, 2015
Fixed rate			3.85%
U.S. Bank National Association [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Floating rate	1.50%
Federal Home Loan Bank Advances [Member] | Minimum [Member]
Fixed rate	1.20%	1.20%
Federal Home Loan Bank Advances [Member] | Maximum [Member]
Fixed rate	7.37%	7.37%
Note Payable Due 10/15/2020 [Member]
Fixed rate	3.85%	3.85%
Trust Preferred Securities Due 12/30/2033 Floating Rate of 2.8% Above Three Month LIBOR 1 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Floating rate	2.80%	2.80%
Trust Preferred Securities Due 6/30/2035 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Floating rate	1.75%	1.75%
Trust Preferred Securities Due 9/15/2037 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Floating rate	1.37%	1.37%
Trust Preferred Securities Due 12/5/2033 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Floating rate	2.88%	2.88%
Trust Preferred Securities Due 10/18/2034 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Floating rate	2.00%	2.00%
Trust Preferred Securities, Due 6/6/2037 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Floating rate	1.57%	1.57%
Trust Preferred Securities, Due 12/15/2035 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Floating rate	1.45%
Trust Preferred Securities, Due 6/26/2033 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Floating rate	3.10%
Trust Preferred Securities, Due 10/7/2033 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Floating rate	2.85%
Second Trust Preferred Securities Due 9/15/2037 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Floating rate	2.00%

Note 11 - Other Borrowings an93

Note 11 - Other Borrowings and Subordinated Debentures - Aggregate Annual Maturities of Long-term Debt (Details) $ in Thousands	Dec. 31, 2017USD ($)
2,018	$ 23,093
2,019	7,486
2,020	36,222
2,021	2,165
2,022	1,314
Thereafter	148,307
Total	$ 218,587

Note 12 - Capital Stock (Detail

Note 12 - Capital Stock (Details Textual)	Feb. 08, 2018	Feb. 27, 2015shares	Dec. 31, 2016	Feb. 18, 2016	Jul. 23, 2012shares	Feb. 27, 2009USD ($)$ / sharesshares
Preferred Stock, Shares Authorized						40,040,000
Preferred Stock, Par or Stated Value Per Share | $ / shares						$ 0.01
Preferred Stock, Dividend Rate, Percentage			9.00%	1.00%
Stock Repurchase Program, Number of Shares Authorized to be Repurchased					850,000
Percent of Oustanding Stock					5.00%
Community First Bancshares Inc [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares		13,105,830
Community First Bancshares Inc [Member] | Preferred Stock [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares		30,852
Subsequent Event [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	2
Maximum [Member]
Preferred Stock, Liquidation Preference, Value | $						$ 80,000,000

Note 13 - Transactions With R95

Note 13 - Transactions With Related Parties (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Notes Receivable, Related Parties	$ 58,867	$ 65,834	$ 58,404

Note 13 - Transactions With R96

Note 13 - Transactions With Related Parties - Related Party Transactions, Extensions of Credit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Balance, beginning of year	$ 65,834	$ 58,404
New extensions of credit	9,092	18,298
Repayments	(16,059)	(10,868)
Balance, end of year	$ 58,867	$ 65,834

Note 14 - Employee Benefit Pl97

Note 14 - Employee Benefit Plans (Details Textual)	Feb. 08, 2018	Dec. 31, 2017USD ($)$ / sharesshares	Dec. 31, 2016USD ($)$ / sharesshares	Dec. 31, 2015USD ($)$ / sharesshares
Employee Stock Ownership Plan (ESOP), Compensation Expense		$ 6,343,000	$ 5,488,000	$ 6,278,000
Deferred Compensation Arrangement with Individual, Compensation Expense		$ 1,596,000	1,056,000	804,000
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent		95.00%
Allocated Share-based Compensation Expense		$ 11,763,000	$ 5,451,000	$ 4,018,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options		264,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options		$ 23,300,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		2 years 109 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value		$ 5,342,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value		$ 4,761,000
Share Price | $ / shares		$ 28.55
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period | shares		122,012	127,424	142,736
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value		$ 1,329,000	$ 2,031,000	$ 2,054,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | shares		0	116,000	750,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares			$ 5.82	$ 3.91
Subsequent Event [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	2
Employee Stock Purchase Plan 2011 [Member]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount		$ 25,000
Special Employee Stock Purchase Plan 2015 [Member]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount		$ 10,000
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent		85.00%

Note 14 - Employee Benefit Pl98

Note 14 - Employee Benefit Plans - Stock Compensation Plans (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Stock Options Outstanding Number of Shares, Balance (in shares)	946,000	970,000	240,000
Stock Options Outstanding Weighted Average Exercise Price, Balance (in dollars per share)	$ 21.43	$ 20.31	$ 13.86
Stock Options Outstanding Number of Shares, Granted (in shares)	0	116,000	750,000
Stock Options Outstanding Weighted Average Exercise Price, Granted (in dollars per share)		$ 23.51	$ 22.35
Stock Options Outstanding Number of Shares, Stock Options Exercised (in shares)	(122,012)	(127,424)	(142,736)
Stock Options Outstanding Weighted Average Exercise Price, Stock Options Exercised (in dollars per share)	$ 17.66	$ 15.14	$ 11.29
Stock Awards/Units Outstanding Number of Shares, Stock Options Exercised (in shares)	122,012	127,424	142,736
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	122,012	127,424	142,736
Stock issued for acquisition, shares (in shares)			132,000
Stock Options Outstanding Weighted Average Exercise Price, Stock Options from Acquisitions (in dollars per share)			$ 10.22
Stock Options Outstanding Number of Shares, Stock Awards/Units Vested (in shares)
Stock Options Outstanding Number of Shares, Forfeited/Expired (in shares)	(12,000)	(12,000)	(10,000)
Stock Options Outstanding Weighted Average Exercise Price, Forfeited/Expired (in dollars per share)	$ 22.67	$ 17.53	$ 12.25
Stock Options Outstanding Number of Shares, Balance (in shares)	812,000	946,000	970,000
Stock Options Outstanding Weighted Average Exercise Price, Balance (in dollars per share)	$ 21.98	$ 21.43	$ 20.31
Stock Options Outstanding Number of Shares, Stock Options Exercised (in shares)	(122,012)	(127,424)	(142,736)
Stock Options Outstanding Weighted Average Exercise Price, Stock Options Exercised (in dollars per share)	$ 17.66	$ 15.14	$ 11.29
Stock Options Outstanding Number of Shares, Exercisable (in shares)	711,000
Stock Options Outstanding Weighted Average Exercise Price,Exercisable (in dollars per share)	$ 21.85
Restricted Stock [Member]
Stock Awards/Units Outstanding Number of Shares, Balance (in shares)	278,000	342,000	454,000
Stock Awards/Units Outstanding Weighted Average Grant-Date Fair-Value, Balance (in dollars per share)	$ 20.48	$ 17.83	$ 15.94
Stock Awards/Units Outstanding Number of Shares, Granted (in shares)		272,000	190,000
Stock Awards/Units Outstanding Weighted Average Grant-Date Fair-Value, Granted (in dollars per share)		$ 23.46	$ 21.73
Stock Options Outstanding Number of Shares, Stock Options Exercised (in shares)
Stock Awards/Units Outstanding Number of Shares, Stock Options Exercised (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Stock Options Outstanding Number of Shares, Stock Awards/Units Vested (in shares)	(91,000)	(318,000)	(262,000)
Stock Awards/Units Outstanding Weighted Average Grant-Date Fair-Value, Vested (in dollars per share)	$ 19.40	$ 20.96	$ 17.39
Stock Awards/Units Outstanding Number of Shares, Forfeited/Expired (in shares)	(25,000)	(18,000)	(40,000)
Stock Awards/Units Outstanding Weighted Average Grant-Date Fair-Value, Forfeited/Expired (in dollars per share)	$ 21.91	$ 21.85	$ 17.68
Stock Awards/Units Outstanding Number of Shares, Balance (in shares)	162,000	278,000	342,000
Stock Awards/Units Outstanding Weighted Average Grant-Date Fair-Value, Balance (in dollars per share)	$ 20.86	$ 20.48	$ 17.83
Stock Options Outstanding Number of Shares, Stock Options Exercised (in shares)
Stock Options Outstanding Number of Shares, Exercisable (in shares)
Stock Units [Member]
Stock Awards/Units Outstanding Number of Shares, Balance (in shares)	225,000	40,000
Stock Awards/Units Outstanding Weighted Average Grant-Date Fair-Value, Balance (in dollars per share)	$ 22.70	$ 18.58
Stock Awards/Units Outstanding Number of Shares, Granted (in shares)	849,000	216,000	40,000
Stock Awards/Units Outstanding Weighted Average Grant-Date Fair-Value, Granted (in dollars per share)	$ 28.86	$ 23.48	$ 18.58
Stock Options Outstanding Number of Shares, Stock Options Exercised (in shares)
Stock Awards/Units Outstanding Number of Shares, Stock Options Exercised (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Stock Options Outstanding Number of Shares, Stock Awards/Units Vested (in shares)	(392,000)	(25,000)
Stock Awards/Units Outstanding Weighted Average Grant-Date Fair-Value, Vested (in dollars per share)	$ 27.13	$ 22.77
Stock Awards/Units Outstanding Number of Shares, Forfeited/Expired (in shares)	(30,000)	(6,000)
Stock Awards/Units Outstanding Weighted Average Grant-Date Fair-Value, Forfeited/Expired (in dollars per share)	$ 25.76	$ 23.51
Stock Awards/Units Outstanding Number of Shares, Balance (in shares)	652,000	225,000	40,000
Stock Awards/Units Outstanding Weighted Average Grant-Date Fair-Value, Balance (in dollars per share)	$ 27.92	$ 22.70	$ 18.58
Stock Options Outstanding Number of Shares, Stock Options Exercised (in shares)
Stock Options Outstanding Number of Shares, Exercisable (in shares)

Note 14 - Employee Benefit Pl99

Note 14 - Employee Benefit Plans - Stock Options Outstanding by Range of Exercise Prices (Details)	12 Months Ended
	Dec. 31, 2017$ / sharesshares
Range of exercise prices, minimum (in dollars per share)	$ 8.78
Range of exercise prices, maximum (in dollars per share)	$ 24.07
Options outstanding, number of shares (in shares) | shares	812
Options outstanding, weighted average remaining contractual life (Year)	6 years 302 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 21.98
Options exercisable, number of shares (in shares) | shares	711
Options exercisable, weighted average exercise price (in dollars per share)	$ 21.85
Range01 [Member]
Range of exercise prices, minimum (in dollars per share)	8.78
Range of exercise prices, maximum (in dollars per share)	$ 10.57
Options outstanding, number of shares (in shares) | shares	7
Options outstanding, weighted average remaining contractual life (Year)	2 years 131 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 9.64
Options exercisable, number of shares (in shares) | shares	7
Options exercisable, weighted average exercise price (in dollars per share)	$ 9.64
Range 02 [Member]
Range of exercise prices, minimum (in dollars per share)	10.65
Range of exercise prices, maximum (in dollars per share)	$ 10.65
Options outstanding, number of shares (in shares) | shares	7
Options outstanding, weighted average remaining contractual life (Year)	5 years 21 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 10.65
Options exercisable, number of shares (in shares) | shares	4
Options exercisable, weighted average exercise price (in dollars per share)	$ 10.65
Range 03 [Member]
Range of exercise prices, minimum (in dollars per share)	10.76
Range of exercise prices, maximum (in dollars per share)	$ 10.76
Options outstanding, number of shares (in shares) | shares	3
Options outstanding, weighted average remaining contractual life (Year)	2 years 18 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 10.76
Options exercisable, number of shares (in shares) | shares	3
Options exercisable, weighted average exercise price (in dollars per share)	$ 10.76
Range 04 [Member]
Range of exercise prices, minimum (in dollars per share)	15.16
Range of exercise prices, maximum (in dollars per share)	$ 15.16
Options outstanding, number of shares (in shares) | shares	36
Options outstanding, weighted average remaining contractual life (Year)	149 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 15.16
Options exercisable, number of shares (in shares) | shares	36
Options exercisable, weighted average exercise price (in dollars per share)	$ 15.16
Range 05 [Member]
Range of exercise prices, minimum (in dollars per share)	20.29
Range of exercise prices, maximum (in dollars per share)	$ 20.29
Options outstanding, number of shares (in shares) | shares	78
Options outstanding, weighted average remaining contractual life (Year)	7 years
Options outstanding, weighted average exercise price (in dollars per share)	$ 20.29
Options exercisable, number of shares (in shares) | shares	78
Options exercisable, weighted average exercise price (in dollars per share)	$ 20.29
Range 06 [Member]
Range of exercise prices, minimum (in dollars per share)	20.36
Range of exercise prices, maximum (in dollars per share)	$ 20.36
Options outstanding, number of shares (in shares) | shares	3
Options outstanding, weighted average remaining contractual life (Year)	6 years 321 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 20.36
Options exercisable, number of shares (in shares) | shares	2
Options exercisable, weighted average exercise price (in dollars per share)	$ 20.36
Range 07 [Member]
Range of exercise prices, minimum (in dollars per share)	22.20
Range of exercise prices, maximum (in dollars per share)	$ 22.20
Options outstanding, number of shares (in shares) | shares	82
Options outstanding, weighted average remaining contractual life (Year)	6 years 339 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 22.20
Options exercisable, number of shares (in shares) | shares	57
Options exercisable, weighted average exercise price (in dollars per share)	$ 22.20
Range 08 [Member]
Range of exercise prices, minimum (in dollars per share)	22.75
Range of exercise prices, maximum (in dollars per share)	$ 22.75
Options outstanding, number of shares (in shares) | shares	481
Options outstanding, weighted average remaining contractual life (Year)	7 years 54 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 22.75
Options exercisable, number of shares (in shares) | shares	481
Options exercisable, weighted average exercise price (in dollars per share)	$ 22.75
Range 09 [Member]
Range of exercise prices, minimum (in dollars per share)	23.51
Range of exercise prices, maximum (in dollars per share)	$ 23.51
Options outstanding, number of shares (in shares) | shares	108
Options outstanding, weighted average remaining contractual life (Year)	7 years 299 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 23.51
Options exercisable, number of shares (in shares) | shares	36
Options exercisable, weighted average exercise price (in dollars per share)	$ 23.51
Range 10 [Member]
Range of exercise prices, minimum (in dollars per share)	24.07
Range of exercise prices, maximum (in dollars per share)	$ 24.07
Options outstanding, number of shares (in shares) | shares	7
Options outstanding, weighted average remaining contractual life (Year)	7 years 259 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 24.07
Options exercisable, number of shares (in shares) | shares	7
Options exercisable, weighted average exercise price (in dollars per share)	$ 24.07

Note 14 - Employee Benefit P100

Note 14 - Employee Benefit Plans - Weighted-Average Fair Value Assumptions (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Expected dividend yield	1.96%	2.06%
Expected stock price volatility	27.34%	16.96%
Risk-free interest rate	2.01%	2.17%
Expected life of options (in years) (Year)	7 years	10 years

Note 15 - Additional Cash Fl101

Note 15 - Additional Cash Flow Information - Additional Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest paid	$ 39,384	$ 22,069	$ 21,700
Income taxes paid	35,770	39,824	20,127
Transfers of Loans Not Covered by FDIC Loss Share to Foreclosed Assets Held-for-sale [Member]
Real estate transferred	6,983	4,604	16,456
Transfers of Loans Acquired Covered by FDIC Loss Share to Foreclosed Assets Covered by FDIC Loss Share [Member]
Real estate transferred			4,349
Transfers of Foreclosed Assets Covered by FDIC Loss Share to Foreclosed Assets Held for Sale [Member]
Real estate transferred			13,895
Transfers of Loans Acquired Covered by FDIC Loss Share, to Loans Acquired not Covered by FDIC Loss Share [Member]
Real estate transferred			88,922
Transfer of Premises to Foreclosed Assets and Other Real Estate Owned [Member]
Real estate transferred	5,422
Transfers of Premises Held-for-sale to Foreclosed Assets Held-for-sale [Member]
Real estate transferred	$ 3,188	$ 652	$ 6,126

Note 15 - Additional Cash Fl102

Note 15 - Additional Cash Flow Information - Company Acquired Assets and Assumed Liabilities Under Purchase Method (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill	$ 842,651	$ 348,505
Citizens, Liberty Community, First Metropolitan, Delta Trust Acquisitions, and Ozark [Member]
Assets acquired	5,582,495	585,500	$ 2,996,228
Liabilities assumed	5,022,824	530,695	2,680,140
Purchase price	1,055,993	76,300	535,003
Goodwill	$ 496,322	$ 21,495	$ 218,915

Note 16 - Other Operating Ex103

Note 16 - Other Operating Expenses (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Equipment Expense	$ 19,366,000	$ 16,683,000	$ 14,352,000
Equipment Rentals [Member]
Equipment Expense	2,200,000	2,300,000	2,600,000
Leasing of ATMs [Member]
Equipment Expense	1,335,000	1,338,000	1,463,000
Occupancy Expense [Member]
Operating Leases, Rent Expense	$ 5,580,000	$ 4,643,000	$ 4,216,000

Note 16 - Other Operating Ex104

Note 16 - Other Operating Expenses - Other Operating Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Professional services	$ 19,500	$ 14,630	$ 9,583
Postage	4,686	4,599	4,219
Telephone	4,262	4,294	4,817
Credit card expense	12,188	11,328	9,157
Marketing	11,141	6,929	6,337
Operating supplies	1,980	1,824	2,395
Amortization of intangibles	7,668	5,945	4,889
Branch right sizing expense	434	3,600	3,297
Other expense	27,020	20,364	20,001
Total other operating expenses	$ 88,879	$ 73,513	$ 64,695

Note 17 - Fair Value Measure105

Note 17 - Fair Value Measurements (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Real Estate Acquired Through Foreclosure	$ 32,118,000	$ 26,895,000
Impaired Financing Receivable, Related Allowance	338,000	680,000
Collateral Dependent Loans [Member]
Impaired Financing Receivable, Related Allowance	$ 2,195,000	2,384,000
Commercial and Residential Real Estate Collateral [Member] | Minimum [Member]
Fair Value Percentage Of Collateral Discount	10.00%
Commercial and Residential Real Estate Collateral [Member] | Maximum [Member]
Fair Value Percentage Of Collateral Discount	40.00%
Foreclosed Assets Not Covered By FDIC Loss Share [Member]
Real Estate Acquired Through Foreclosure	$ 32,100,000	$ 26,900,000
Special Mention Or Worse [Member]
Collateral Dependent Loans Amount At Which All Loans Are Tested	$ 1,500,000

Note 17 - Fair Value Measure106

Note 17 - Fair Value Measurements - Fair Value of Financial Assets Measure on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Available-for-sale securities	$ 1,589,517	$ 1,157,354
Assets held in trading accounts		41
Fair Value, Measurements, Recurring [Member]
Other assets held for sale	165,780
Derivative asset	3,634	1,199
Other liabilities held for sale	(157,366)
Derivative liability	(3,068)	(1,274)
Assets held in trading accounts		41
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Other assets held for sale
Derivative asset
Other liabilities held for sale
Derivative liability
Assets held in trading accounts
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Other assets held for sale
Derivative asset	3,634	1,199
Other liabilities held for sale
Derivative liability	(3,068)	(1,274)
Assets held in trading accounts		41
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Other assets held for sale	165,780
Derivative asset
Other liabilities held for sale	(157,366)
Derivative liability
Assets held in trading accounts
US Government Agencies Debt Securities [Member]
Available-for-sale securities	139,724	137,771
US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Available-for-sale securities	139,724	137,771
US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Available-for-sale securities
US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Available-for-sale securities	139,724	137,771
US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Available-for-sale securities
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Available-for-sale securities	1,187,317	868,324
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Fair Value, Measurements, Recurring [Member]
Available-for-sale securities	1,187,317	868,324
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Available-for-sale securities
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Available-for-sale securities	1,187,317	868,324
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Available-for-sale securities
US States and Political Subdivisions Debt Securities [Member]
Available-for-sale securities	143,165	102,943
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Available-for-sale securities	143,165	102,943
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Available-for-sale securities
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Available-for-sale securities	143,165	102,943
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Available-for-sale securities
Other Securities [Member]
Available-for-sale securities	119,311	48,016
Other Securities [Member] | Fair Value, Measurements, Recurring [Member]
Other securities	119,311	48,016
Other Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Other securities
Other Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Other securities	119,311	48,016
Other Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Other securities
US Treasury Securities [Member]
Available-for-sale securities		300
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member]
Available-for-sale securities		300
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Available-for-sale securities		300
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Available-for-sale securities
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Available-for-sale securities

Note 17 - Fair Value Measure107

Note 17 - Fair Value Measurements - Fair Value of Financial Assets Measured on a Nonrecurring Basis (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016
Impaired loans (1) (2) (collateral dependent)	[1],[2]	$ 11,229	$ 17,154
Foreclosed assets and other real estate owned (1)	[2]	24,093	17,806
Fair Value, Inputs, Level 3 [Member]
Impaired loans (1) (2) (collateral dependent)	[1],[2]	11,229	17,154
Foreclosed assets and other real estate owned (1)	[2]	24,093	17,806
Fair Value, Inputs, Level 1 [Member]
Foreclosed assets and other real estate owned (1)	[2]
Fair Value, Inputs, Level 2 [Member]
Foreclosed assets and other real estate owned (1)	[2]
[1]	Specific allocations of $2,195,000 and $2,384,000 were related to the impaired collateral dependent loans for which fair value re-measurements took place during the periods ended December 31, 2017 and 2016, respectively.
[2]	These amounts represent the resulting carrying amounts on the Consolidated Balance Sheets for impaired collateral dependent loans and foreclosed assets and other real estate owned for which fair value re-measurements took place during the period.

Note 17 - Fair Value Measure108

Note 17 - Fair Value Measurements - Estimated Fair Values and Related Carrying Amounts of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financial assets:
Held-to-maturity securities	$ 373,298	$ 465,960
Reported Value Measurement [Member]
Financial assets:
Cash and cash equivalents	598,042	285,659
Interest bearing balances due from banks - time	3,314	4,563
Held-to-maturity securities	368,058	462,096
Mortgage loans held for sale	24,038	27,788
Interest receivable	43,528	27,788
Financial liabilities:
Federal funds purchased and securities sold under agreements to repurchase	122,444	115,029
Other borrowings	1,380,024	273,159
Subordinated debentures	140,565	60,397
Interest payable	4,564	1,668
Reported Value Measurement [Member] | Non-Interest Bearing Transaction Accounts [Member]
Financial liabilities:
Deposits	2,665,249	1,491,676
Reported Value Measurement [Member] | Interest Bearing Transaction Accounts and Savings Deposits [Member]
Financial liabilities:
Deposits	6,494,896	3,956,483
Reported Value Measurement [Member] | Time Deposits [Member]
Financial liabilities:
Deposits	1,932,730	1,287,060
Reported Value Measurement [Member] | Legacy Loans [Member]
Financial assets:
Legacy loans (net of allowance)	5,663,941	4,290,921
Reported Value Measurement [Member] | Acquired Loans [Member]
Financial assets:
Legacy loans (net of allowance)	5,074,076	1,305,683
Estimate of Fair Value Measurement [Member]
Financial assets:
Cash and cash equivalents	598,042	285,659
Interest bearing balances due from banks - time	3,314	4,563
Held-to-maturity securities	373,298	465,960
Mortgage loans held for sale	24,038	27,788
Interest receivable	43,528	27,788
Financial liabilities:
Federal funds purchased and securities sold under agreements to repurchase	122,444	115,029
Other borrowings	1,381,365	292,367
Subordinated debentures	136,474	55,318
Interest payable	4,564	1,668
Estimate of Fair Value Measurement [Member] | Non-Interest Bearing Transaction Accounts [Member]
Financial liabilities:
Deposits	2,665,249	1,491,676
Estimate of Fair Value Measurement [Member] | Interest Bearing Transaction Accounts and Savings Deposits [Member]
Financial liabilities:
Deposits	6,494,896	3,956,483
Estimate of Fair Value Measurement [Member] | Time Deposits [Member]
Financial liabilities:
Deposits	1,915,539	1,278,339
Estimate of Fair Value Measurement [Member] | Legacy Loans [Member]
Financial assets:
Legacy loans (net of allowance)	5,646,505	4,305,165
Estimate of Fair Value Measurement [Member] | Acquired Loans [Member]
Financial assets:
Legacy loans (net of allowance)	5,058,455	1,310,017
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Financial assets:
Cash and cash equivalents	598,042	285,659
Interest bearing balances due from banks - time
Held-to-maturity securities
Mortgage loans held for sale
Interest receivable
Financial liabilities:
Federal funds purchased and securities sold under agreements to repurchase
Other borrowings
Subordinated debentures
Interest payable
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Non-Interest Bearing Transaction Accounts [Member]
Financial liabilities:
Deposits
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Interest Bearing Transaction Accounts and Savings Deposits [Member]
Financial liabilities:
Deposits
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Time Deposits [Member]
Financial liabilities:
Deposits
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Legacy Loans [Member]
Financial assets:
Legacy loans (net of allowance)
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Acquired Loans [Member]
Financial assets:
Legacy loans (net of allowance)
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Financial assets:
Cash and cash equivalents
Interest bearing balances due from banks - time	3,314	4,563
Held-to-maturity securities	373,298	465,960
Mortgage loans held for sale
Interest receivable	43,528	27,788
Financial liabilities:
Federal funds purchased and securities sold under agreements to repurchase	122,444	115,029
Other borrowings	1,381,365	292,367
Subordinated debentures	136,474	55,318
Interest payable	4,564	1,668
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Non-Interest Bearing Transaction Accounts [Member]
Financial liabilities:
Deposits	2,665,249	1,491,676
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Bearing Transaction Accounts and Savings Deposits [Member]
Financial liabilities:
Deposits	6,494,896	3,956,483
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Time Deposits [Member]
Financial liabilities:
Deposits
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Legacy Loans [Member]
Financial assets:
Legacy loans (net of allowance)
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Acquired Loans [Member]
Financial assets:
Legacy loans (net of allowance)
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Financial assets:
Cash and cash equivalents
Interest bearing balances due from banks - time
Held-to-maturity securities
Mortgage loans held for sale	24,038	27,788
Interest receivable
Financial liabilities:
Federal funds purchased and securities sold under agreements to repurchase
Other borrowings
Subordinated debentures
Interest payable
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Non-Interest Bearing Transaction Accounts [Member]
Financial liabilities:
Deposits
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Interest Bearing Transaction Accounts and Savings Deposits [Member]
Financial liabilities:
Deposits
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Time Deposits [Member]
Financial liabilities:
Deposits	1,915,539	1,278,339
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Legacy Loans [Member]
Financial assets:
Legacy loans (net of allowance)	5,646,505	4,305,165
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Acquired Loans [Member]
Financial assets:
Legacy loans (net of allowance)	$ 5,058,455	$ 1,310,017

Note 18 - Commitments and Cr109

Note 18 - Commitments and Credit Risk (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Letters of Credit Outstanding, Amount	$ 47,621,000	$ 29,362,000
Standby Letters of Credit [Member]
Deferred Revenue	$ 0	$ 0
Minimum [Member]
Letters of Credit Term	270 days	270 days
Maximum [Member]
Letters of Credit Term	15 years	15 years
Credit Card Commitments to Extend Credit [Member]
Commitments and Contingencies	$ 564,592,000	$ 562,527,000
Other Loan Commitments to Extend Credit [Member]
Commitments and Contingencies	$ 3,086,696,000	$ 1,220,137,000

Note 19 - New Accounting Sta110

Note 19 - New Accounting Standards (Details Textual) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Stockholders' Equity, Effects of Tax Law Changes
Income Tax Expense (Benefit)		61,983	$ 46,624	$ 32,900
Accounting Standards Update 2016-09 [Member]
Income Tax Expense (Benefit)		(1,700)
Retained Earnings [Member]
Stockholders' Equity, Effects of Tax Law Changes		$ 3,016
Retained Earnings [Member] | New Accounting Pronouncement, Early Adoption, Effect [Member]
Stockholders' Equity, Effects of Tax Law Changes	$ 3,000

Note 21 - Stockholders' Equi111

Note 21 - Stockholders' Equity (Details Textual) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)
Threshold Percentage of Net Profits Exceeded by Dividends Declared, Any Calendar Year	75.00%
Threshold Percentage of Net Profits Exceeded by Dividends Declared, Combined with Preceding Year	75.00%
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval	$ 7.5
Common Equity Tier 1 Capital Required for Capital Adequacy to Risk Weighted Assets	4.50%
Capital Conservation Buffer	2.50%
Capital Conservation Buffer Phase In Amount	0.625%

Note 21 - Stockholders' Equi112

Note 21 - Stockholders' Equity - Company's Significant Subsidiaries (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Common Equity Tier 1 Capital Required for Capital Adequacy to Risk Weighted Assets	4.50%
Simmons First National Corporation [Member]
Capital	$ 1,388,970	$ 912,948
Capital to Risk Weighted Assets	11.40%	15.10%
Capital Required for Capital Adequacy	$ 974,716	$ 483,681
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%	8.00%
Tier One Risk Based Capital	$ 1,199,457	$ 872,707
Tier One Risk Based Capital to Risk Weighted Assets	9.80%	14.50%
Tier One Risk Based Capital Required for Capital Adequacy	$ 734,361	$ 361,120
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	6.00%	6.00%
Common Equity Tier 1 Capital	$ 1,199,457	$ 812,310
Common Equity Tier 1 Capital to Average Assets	9.80%	13.50%
Common Equity Tier 1 Capital Required for Capital Adequacy	$ 550,771	$ 270,770
Common Equity Tier 1 Capital Required for Capital Adequacy to Risk Weighted Assets	4.50%	4.50%
Tier One Leverage Capital	$ 1,199,457	$ 872,707
Tier One Leverage Capital to Average Assets	9.20%	11.00%
Tier One Leverage Capital Required for Capital Adequacy	$ 521,503	$ 317,348
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%	4.00%
Simmons First National Bank [Member]
Capital	$ 877,728	$ 830,921
Capital to Risk Weighted Assets	12.10%	13.80%
Capital Required for Capital Adequacy	$ 580,316	$ 481,693
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%	8.00%
Capital Required to be Well Capitalized	$ 725,395	$ 602,117
Capital Required to be Well Capitalized to Risk Weighted Assets	10.00%	10.00%
Tier One Risk Based Capital	$ 835,787	$ 790,673
Tier One Risk Based Capital to Risk Weighted Assets	11.50%	13.20%
Tier One Risk Based Capital Required for Capital Adequacy	$ 436,063	$ 359,397
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	6.00%	6.00%
Tier One Risk Based Capital Required to be Well Capitalized	$ 581,417	$ 479,196
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	8.00%	8.00%
Common Equity Tier 1 Capital	$ 835,787	$ 790,673
Common Equity Tier 1 Capital to Average Assets	11.50%	13.20%
Common Equity Tier 1 Capital Required for Capital Adequacy	$ 327,047	$ 269,548
Common Equity Tier 1 Capital Required for Capital Adequacy to Risk Weighted Assets	4.50%	4.50%
Common Equity Tier 1 Capital Required to Be Well Capitalized	$ 472,401	$ 389,347
Common Equity Tier 1 Capital Required to Be Well Capitalized to Average Assets	6.50%	6.50%
Tier One Leverage Capital	$ 835,787	$ 790,673
Tier One Leverage Capital to Average Assets	9.20%	10.00%
Tier One Leverage Capital Required for Capital Adequacy	$ 363,386	$ 316,269
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%	4.00%
Tier One Leverage Capital Required to be Well Capitalized	$ 454,232	$ 395,337
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	5.00%	5.00%
Bank SNB [Member]
Capital	$ 259,077
Capital to Risk Weighted Assets	10.90%
Capital Required for Capital Adequacy	$ 190,148
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%
Capital Required to be Well Capitalized	$ 237,685
Capital Required to be Well Capitalized to Risk Weighted Assets	10.00%
Tier One Risk Based Capital	$ 255,360
Tier One Risk Based Capital to Risk Weighted Assets	10.70%
Tier One Risk Based Capital Required for Capital Adequacy	$ 143,193
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	6.00%
Tier One Risk Based Capital Required to be Well Capitalized	$ 190,923
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	8.00%
Common Equity Tier 1 Capital	$ 255,360
Common Equity Tier 1 Capital to Average Assets	10.70%
Common Equity Tier 1 Capital Required for Capital Adequacy	$ 107,394
Common Equity Tier 1 Capital Required for Capital Adequacy to Risk Weighted Assets	4.50%
Common Equity Tier 1 Capital Required to Be Well Capitalized	$ 155,125
Common Equity Tier 1 Capital Required to Be Well Capitalized to Average Assets	6.50%
Tier One Leverage Capital	$ 255,360
Tier One Leverage Capital to Average Assets	10.10%
Tier One Leverage Capital Required for Capital Adequacy	$ 101,133
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%
Tier One Leverage Capital Required to be Well Capitalized	$ 126,416
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	5.00%
Southwest Bank [Member]
Capital	$ 297,164
Capital to Risk Weighted Assets	11.00%
Capital Required for Capital Adequacy	$ 216,119
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%
Capital Required to be Well Capitalized	$ 270,149
Capital Required to be Well Capitalized to Risk Weighted Assets	10.00%
Tier One Risk Based Capital	$ 294,874
Tier One Risk Based Capital to Risk Weighted Assets	10.90%
Tier One Risk Based Capital Required for Capital Adequacy	$ 162,316
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	6.00%
Tier One Risk Based Capital Required to be Well Capitalized	$ 216,421
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	8.00%
Common Equity Tier 1 Capital	$ 294,874
Common Equity Tier 1 Capital to Average Assets	10.90%
Common Equity Tier 1 Capital Required for Capital Adequacy	$ 121,737
Common Equity Tier 1 Capital Required for Capital Adequacy to Risk Weighted Assets	4.50%
Common Equity Tier 1 Capital Required to Be Well Capitalized	$ 175,842
Common Equity Tier 1 Capital Required to Be Well Capitalized to Average Assets	6.50%
Tier One Leverage Capital	$ 294,874
Tier One Leverage Capital to Average Assets	12.20%
Tier One Leverage Capital Required for Capital Adequacy	$ 96,680
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%
Tier One Leverage Capital Required to be Well Capitalized	$ 120,850
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	5.00%

Note 22 - Condensed Financia113

Note 22 - Condensed Financial Information (Parent Company Only) - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Cash and cash equivalents	$ 598,042	$ 285,659
Investment securities	1,957,575	1,619,450
Loans	10,738,017	5,596,604
Premises and equipment	287,249	199,359
Other assets	71,439	65,773
TOTAL ASSETS	15,055,806	8,400,056
LIABILITIES
Long-term debt	218,587
Total liabilities	12,971,242	7,248,945
Stockholders’ equity:
Common stock	920	626
Surplus	1,586,034	711,663
Undivided profits	514,874	454,034
Total stockholders’ equity	2,084,564	1,151,111	$ 1,076,855	$ 494,319
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	15,055,806	8,400,056
Parent Company [Member]
ASSETS
Cash and cash equivalents	19,101	93,266
Investment securities	2,789	79
Investments in wholly-owned subsidiaries	2,288,687	1,141,294
Loans	993	1,083
Intangible assets, net	133	133
Premises and equipment	10,369	11,534
Other assets	31,181	27,955
TOTAL ASSETS	2,353,253	1,275,344
LIABILITIES
Short-term debt	75,000
Long-term debt	183,947	108,326
Other liabilities	9,742	15,907
Total liabilities	268,689	124,233
Stockholders’ equity:
Common stock	920	626
Surplus	1,586,034	711,663
Undivided profits	514,874	454,034
Unrealized depreciation on available-for-sale securities, net of income taxes of ($6,108) and ($9,818) at December 31, 2017 and 2016 respectively	(17,264)	(15,212)
Total stockholders’ equity	2,084,564	1,151,111
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 2,353,253	$ 1,275,344

Note 22 - Condensed Financia114

Note 22 - Condensed Financial Information (Parent Company Only) - Condensed Balance Sheets (Details) (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Parent Company [Member]
Unrealized depreciation on available-for-sale securities, net of income taxes	$ (6,108)	$ (9,818)

Note 22 - Condensed Financia115

Note 22 - Condensed Financial Information (Parent Company Only) - Condensed Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Provision for income taxes	$ 61,983	$ 46,624	$ 32,900
NET INCOME	92,940	96,814	74,364
Preferred stock dividends		24	257
NET INCOME AVAILABLE TO COMMON SHAREHOLDERS	92,940	96,790	74,107
Parent Company [Member]
Income Statement [Abstract]
Dividends from subsidiaries	69,107	83,710	84,128
Other income	4,111	2,465	2,303
Income	73,218	86,175	86,431
EXPENSE	32,234	21,990	24,594
Income before income taxes and equity in undistributed net income of subsidiaries	40,984	64,185	61,837
Provision for income taxes	(12,311)	(7,557)	(8,251)
Income before equity in undistributed net income of subsidiaries	53,295	71,742	70,088
Equity in undistributed net income of subsidiaries	39,645	25,072	4,276
NET INCOME	92,940	96,814	74,364
Preferred stock dividends		24	257
NET INCOME AVAILABLE TO COMMON SHAREHOLDERS	$ 92,940	$ 96,790	$ 74,107

Note 22 - Condensed Financia116

Note 22 - Condensed Financial Information (Parent Company Only) - Condensed Statements of Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net income	$ 92,940	$ 96,814	$ 74,364
OTHER COMPREHENSIVE INCOME
Equity in other comprehensive income (loss) income of subsidiaries	964	(12,547)	(1,329)
COMPREHENSIVE INCOME	93,904	84,267	73,035
Parent Company [Member]
Net income	92,940	96,814	74,364
OTHER COMPREHENSIVE INCOME
Equity in other comprehensive income (loss) income of subsidiaries	964	(12,547)	(1,329)
COMPREHENSIVE INCOME	$ 93,904	$ 84,267	$ 73,035

Note 22 - Condensed Financia117

Note 22 - Condensed Financial Information (Parent Company Only) - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
OPERATING ACTIVITIES
Net income	$ 92,940	$ 96,814	$ 74,364
Items not requiring (providing) cash
Stock-based compensation expense	10,681	3,418	4,018
Deferred income taxes	23,251	9,832	13,599
Changes in assets and liabilities:
Other assets	12,456	(8,254)	5,453
INVESTING ACTIVITIES
Net originations of loans not covered by FDIC loss share	(698,532)	(368,162)	(301,323)
Purchases of premises and equipment, net	(34,216)	(18,892)	(14,832)
Proceeds from maturities of available-for-sale securities	487,717	257,388	435,438
FINANCING ACTIVITIES
Dividends paid on preferred stock		(24)	(257)
Dividends paid on common stock	(35,116)	(28,743)	(27,026)
Redemption of preferred stock		(30,852)
(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	312,383	33,397	(83,647)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	285,659	252,262	335,909
CASH AND CASH EQUIVALENTS, END OF YEAR	598,042	285,659	252,262
Parent Company [Member]
OPERATING ACTIVITIES
Net income	92,940	96,814	74,364
Items not requiring (providing) cash
Stock-based compensation expense	10,681	3,418	4,018
Depreciation and amortization	1,183	700	317
Deferred income taxes	1,190	(2,526)	1,287
Equity in undistributed net income of bank subsidiaries	(39,645)	(25,072)	(4,276)
Changes in assets and liabilities:
Other assets	8,585	2,816	(15,232)
Other liabilities	(6,769)	(1,358)	13,121
Net cash provided by operating activities	68,165	74,792	73,599
INVESTING ACTIVITIES
Net originations of loans not covered by FDIC loss share	90	(1,710)
Purchases of premises and equipment, net	(18)	(6,896)	56
Additional investment in subsidiary	(15,000)
Proceeds from maturities of available-for-sale securities	42	1,973
Purchases of available-for-sale securities	(2,752)	(3)	(354)
Cash received (paid) in business combinations	(100,468)	(35,048)	44,173
Net cash (used in) provided by investing activities	(118,106)	(41,684)	43,875
FINANCING ACTIVITIES
Issuance (repayment) of long-term debt, net	8,014	(4,544)	8,126
Issuance of common stock, net	2,878	4,938	3,529
Dividends paid on preferred stock		(24)	(257)
Dividends paid on common stock	(35,116)	(28,743)	(27,026)
Redemption of preferred stock		(30,852)
Net cash used in financing activities	(24,224)	(59,225)	(15,628)
(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(74,165)	(26,117)	101,846
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	93,266	119,383	17,537
CASH AND CASH EQUIVALENTS, END OF YEAR	$ 19,101	$ 93,266	$ 119,383