Cadence Bancorporation 10-K 1 Mar 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2018	Feb. 28, 2019	Jun. 29, 2018
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Trading Symbol	CADE
Entity Registrant Name	CADENCE BANCORPORATION
Entity Central Index Key	1,614,184
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		80,730,371
Entity Public Float			$ 1.4

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Estimated fair value of held-to-maturity securities		$ 311
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	83,625,000	83,625,000
Common Stock, Shares, Outstanding	82,497,009	83,625,000
Treasury stock, shares outstanding	1,127,991

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
ASSETS
Cash and due from banks	$ 237,342	$ 238,707
Interest-bearing deposits with banks	523,436	482,568
Federal funds sold	18,502	9,536
Total cash and cash equivalents	779,280	730,811
Investment securities available-for-sale	1,187,252	1,257,063
Investment securities held-to-maturity (estimated fair value of $311 at December 31, 2017)	0	290
Other securities - FRB and FHLB stock	50,752	50,009
Loans held for sale	59,461	61,359
Loans	10,053,923	8,253,427
Less: allowance for credit losses	(94,378)	(87,576)
Net loans	9,959,545	8,165,851
Premises and equipment, net	63,621	63,432
Other real estate owned	2,406	7,605
Cash surrender value of life insurance	109,850	108,148
Net deferred tax asset	33,224	30,774
Goodwill	307,083	317,817
Other intangible assets, net	7,317	10,223
Other assets	170,494	145,544
Total Assets	12,730,285	10,948,926
Liabilities:
Noninterest-bearing deposits	2,454,016	2,242,765
Interest-bearing deposits	8,254,673	6,768,750
Total deposits	10,708,689	9,011,515
Securities sold under agreements to repurchase	1,106	1,026
Federal Home Loan Bank advances	150,000	150,000
Senior debt	184,801	184,629
Subordinated debt	98,910	98,687
Junior subordinated debentures	36,953	36,472
Other liabilities	111,552	107,541
Total liabilities	11,292,011	9,589,870
Shareholders' Equity:
Common stock $0.01 par value, authorized 300,000,000 shares; 83,625,000 shares issued and 82,497,009 shares outstanding at December 31, 2018 and 83,625,000 shares issued and outstanding at December 31, 2017	836	836
Additional paid-in capital	1,041,000	1,037,040
Treasury stock, at cost 1,127,991 shares outstanding at December 31, 2018	(22,010)
Retained earnings	461,360	340,213
Accumulated other comprehensive loss	(42,912)	(19,033)
Total shareholders' equity	1,438,274	1,359,056
Total Liabilities and Shareholders' Equity	$ 12,730,285	$ 10,948,926

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
INTEREST INCOME
Interest and fees on loans	$ 470,144	$ 359,308	$ 305,553
Interest and dividends on securities:
Taxable	23,793	18,089	15,838
Tax-exempt	9,541	13,360	8,752
Other interest income	9,188	6,110	5,107
Total interest income	512,666	396,867	335,250
INTEREST EXPENSE
Interest on time deposits	42,093	22,213	17,191
Interest on other deposits	58,354	27,486	18,255
Interest on borrowed funds	24,478	20,952	20,365
Total interest expense	124,925	70,651	55,811
Net interest income	387,741	326,216	279,439
Provision for credit losses	12,700	9,735	49,348
Net interest income after provision for credit losses	375,041	316,481	230,091
NONINTEREST INCOME
Investment advisory revenue	21,347	20,517	18,811
Trust services revenue	17,760	19,264	16,109
Credit related fees	16,124	12,166	10,729
Service charges on deposit accounts	15,432	15,272	13,793
Other service fees	5,345	4,414	2,884
Mortgage banking income	2,372	3,731	4,663
Securities (losses) gains, net	(1,853)	(146)	3,736
Other income	18,111	24,656	17,678
Total noninterest income	94,638	99,874	88,403
NONINTEREST EXPENSE
Salaries and employee benefits	154,905	139,118	125,068
Premises and equipment	30,478	28,921	27,982
Merger related expenses	2,983
Intangible asset amortization	2,755	4,652	6,532
Other expense	67,180	60,665	60,598
Total noninterest expense	258,301	233,356	220,180
Income before income taxes	211,378	182,999	98,314
Income tax expense	45,117	80,646	32,540
Net income	$ 166,261	$ 102,353	$ 65,774
Weighted average common shares outstanding (Basic)	83,562,109	81,072,945	75,000,000
Weighted average common shares outstanding (Diluted)	84,375,289	81,605,015	75,294,600
Earnings per common share (Basic)	$ 1.99	$ 1.26	$ 0.88
Earnings per common share (Diluted)	$ 1.97	$ 1.25	$ 0.87

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 166,261	$ 102,353	$ 65,774
Net unrealized (losses) gains on securities available-for-sale:
Net unrealized (losses) gains arising during the period	(23,544)	21,513	(25,361)
Reclassification adjustments for gains (losses) realized in net income	1,425	92	(2,359)
Net unrealized (losses) gains on securities available-for-sale	(22,119)	21,605	(27,720)
Unrealized losses on derivative instruments designated as cash flow hedges:
Net unrealized (losses) arising during the period	(5,934)	(643)	(4,732)
Reclassification adjustments for gains (losses) realized in net income	3,971	(2,339)	(7,106)
Net change in unrealized (losses) on derivative instruments	(1,963)	(2,982)	(11,838)
Change in pension liability:
Actuarial gains (losses) arising during the period	203	37	(145)
Reclassification adjustments for gains realized in net income		84	132
Net unrealized gains (losses) on pension liability	203	121	(13)
Other comprehensive (losses) gains, net of tax	(23,879)	18,744	(39,571)
Comprehensive income	$ 142,382	$ 121,097	$ 26,203

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Unrealized (losses) gains arising during the period, tax effect	$ 7,067	$ (10,558)	$ 14,691
Reclassification adjustments for gains (losses) realized in net income, tax effect	(428)	(54)	1,377
Unrealized (losses) gains arising during the period, tax effect	1,777	783	2,712
Reclassification adjustments for gains (losses) realized in net income, tax effect	(1,193)	1,336	4,149
Actuarial gains (losses) arising during the period, tax effect	(62)	(11)	81
Reclassification adjustments for gains realized in net income, tax effect	$ 0	$ (26)	$ (77)

STATEMENTS OF CHANGES IN SHAREH

STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock [Member]	Retained Earnings	Accumulated OCI
Balance at Dec. 31, 2015	$ 1,054,208	$ 750	$ 879,578		$ 166,840	$ 7,040
Equity-based compensation cost	87		87
Net income	65,774				65,774
Other comprehensive income (loss)	(39,571)					(39,571)
Balance at Dec. 31, 2016	1,080,498	750	879,665		232,614	(32,531)
Equity-based compensation cost	1,880		1,880
Net income	102,353				102,353
Other comprehensive income (loss)	18,744					18,744
Reclassification of amounts within AOCI to retained earnings due to tax reform					5,246	(5,246)
Issuance of 8,625,000 common shares,net of issuance costs	155,581	86	155,495
Balance at Dec. 31, 2017	1,359,056	836	1,037,040		340,213	(19,033)
Equity-based compensation cost	3,960		3,960
Net income	166,261				166,261
Cash dividends declared ($0.55 per common share)	(45,995)				(45,995)
Dividend equivalents on restricted stock (Note 22)	(119)				(119)
Cumulative effect of adoption of new accounting principles (Note 1)	1,000				1,000
Purchase of treasury stock - at cost	(22,010)			$ (22,010)
Other comprehensive income (loss)	(23,879)					(23,879)
Balance at Dec. 31, 2018	$ 1,438,274	$ 836	$ 1,041,000	$ (22,010)	$ 461,360	$ (42,912)

STATEMENTS OF CHANGES IN SHAR_2

STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical)	12 Months Ended
	Dec. 31, 2017shares
Statement Of Stockholders Equity [Abstract]
Issuance of common shares	8,625,000

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 166,261	$ 102,353	$ 65,774
Adjustments to reconcile net income to net cash provided by operations:
Depreciation and amortization	20,366	13,635	13,250
Deferred income tax expense	4,464	44,388	5,980
Provision for loan losses	12,700	9,735	49,348
Loss (gain) on sale of securities, net	1,853	146	(3,736)
Gain on sale of loans, net	(1,422)	(2,670)	(2,904)
Loss on foreclosed property, net	338	1,073	2,114
Increase in interest receivable	(8,985)	(7,904)	(4,155)
Proceeds from sales of loans held for sale	290,733	195,130	137,351
Origination of loans held for sale	(271,680)	(237,404)	(136,774)
(Increase) decrease in other assets	(21,644)	4,079	(11,685)
Increase in other liabilities	1,610	18,078	1,011
Gain on sale of insurance subsidiary assets	(4,871)
Other, net	1,446	4,059	2,439
Net cash flows provided by operating activities	191,169	144,698	118,013
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of securities available-for-sale	(342,500)	(369,786)	(1,120,250)
Proceeds from sales of securities available-for-sale	268,799	161,401	538,960
Proceeds from maturities, calls and paydowns of securities available-for-sale	111,801	96,728	134,501
Proceeds from sale of loans transferred to held for sale	20,894	17,613	328,381
Increase in loans, net	(1,848,463)	(847,428)	(913,069)
Proceeds from sale of insurance subsidiary assets	15,876
Purchase of premises and equipment	(10,698)	(6,428)	(5,356)
Proceeds from disposition of foreclosed property	7,947	17,220	28,489
Other, net	4,395	(20,423)	14,986
Net cash used in investing activities	(1,771,949)	(951,103)	(993,358)
CASH FLOWS FROM FINANCING ACTIVITIES
Increase in deposits, net	1,697,174	994,778	1,029,487
Net change in securities sold under agreements to repurchase	80	(2,468)	(2,346)
Net change in FHLB advances		150,000	(370,000)
Purchase of senior debt		(9,600)	(78)
Repurchase of common stock	(22,010)
Cash dividends paid on common stock	(45,995)
Proceeds from issuance of common stock		155,581
Net cash provided by financing activities	1,629,249	1,288,291	657,063
Net increase (decrease) in cash and cash equivalents	48,469	481,886	(218,282)
Cash and cash equivalents at beginning of period	730,811	248,925	467,207
Cash and cash equivalents at end of period	$ 779,280	$ 730,811	$ 248,925

Summary of Accounting Policies

Summary of Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Accounting Policies	CADENCE BANCORPORATION AND SUBSIDIARIES Cadence Bancorporation (the “Company”) is a Delaware corporation and a financial holding company whose primary asset is its investment in its wholly owned subsidiary bank, Cadence Bank National Association (the “Bank”). Note 1—Summary of Accounting Policies Basis of Presentation and Consolidation The Company and its subsidiaries follow accounting principles generally accepted in the United States of America, including, where applicable, general practices within the banking industry. The consolidated financial statements include the accounts of the Company and its subsidiaries. Significant intercompany accounts and transactions have been eliminated in consolidation. The assessment of whether or not the Company has a controlling interest (i.e., the primary beneficiary) in a variable-interest entity (“VIE”) is performed on an on-going basis. All equity investments in non-consolidated VIEs are included in “other assets” in the Company’s consolidated balance sheets (Note 20). Certain amounts reported in prior years have been reclassified to conform to the 2018 presentation. These reclassifications did not materially impact the Company’s consolidated balance sheets or consolidated statements of income. In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 855, “Subsequent Events,” the Company’s Management has evaluated subsequent events for potential recognition or disclosure in the consolidated financial statements through the date of the issuance of these consolidated financial statements. No subsequent events were identified that would have required a change to the consolidated financial statements or disclosure in the notes to the consolidated financial statements, other than as disclosed in Note 2, Subsequent Events. Nature of Operations The Company’s subsidiaries include: • Town & Country Insurance Agency, Inc., dba Cadence Insurance—full service insurance agency (see “Sale of Subsidiary”); and • The Bank. The Bank operates under a national bank charter and is subject to regulation by the Office of the Comptroller of the Currency (“OCC”). The Bank provides lending services in Georgia and full banking services in five southern states: Alabama, Florida, Mississippi, Tennessee, and Texas. See Note 2, Subsequent Events, regarding the completion of its previously announced merger with State Bank Financial Corporation. The Bank’s subsidiaries include: • Linscomb & Williams Inc. —financial advisory firm, and • Cadence Investment Services, Inc.—provides investment and insurance products. The Company and the Bank also have certain other non-operating and immaterial subsidiaries. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are susceptible to significant change in the near term are the allowance for credit losses, valuation of and accounting for acquired credit impaired loans, valuation of goodwill, intangible assets and deferred income taxes. Sale of Subsidiary On May 31, 2018 the Company completed the sale of the assets of its subsidiary, Town & Country Insurance Agency, Inc. (“T&C) to an unrelated third party, selling $11.1 million in net assets, including $10.9 million in goodwill and intangibles. This transaction resulted in a pre-tax gain of $4.9 million recorded in noninterest income, offset by $1.1 million in sale related expenses recorded in noninterest expenses during the second quarter of 2018. Securities Securities are accounted for as follows: Securities Available-for-Sale Securities classified as available-for-sale are those securities that are intended to be held for an indefinite period of time, but not necessarily to maturity. Any decision to sell a security classified as available-for-sale would be based on various factors, including movements in interest rates, liquidity needs, security risk assessments, changes in the mix of assets and liabilities and other similar factors. These securities are carried at their estimated fair value, and the net unrealized gain or loss is reported as accumulated other comprehensive income, net of tax, until realized. Premiums and discounts are recognized in interest income using the effective interest method. Realized gains and losses on the sale of securities available-for-sale are determined by specific identification using the adjusted cost on a trade date basis and are included in securities gains (losses), net. Securities Held-to-Maturity Securities classified as held-to-maturity are those securities for which there is a positive intent and ability to hold to maturity. These securities are carried at cost, adjusted for amortization of premium and accretion of discount, computed by the effective interest method. The Company had no securities held-to-maturity at December 31, 2018. Equity Securities with readily determinable fair values not held for trading Securities with readily determinable fair values not held for trading consist of marketable equity securities which are carried at fair value with changes in fair value reported in net income. Trading Account Securities Trading account securities are securities that are held for the purpose of selling them at a profit. The Company had no trading account securities as of December 31, 2018 or 2017. FHLB and FRB Stock The Company has ownership in Federal Home Loan Bank of Atlanta (“FHLB”) and Federal Reserve Bank (“FRB”) stock which do not have readily determinable fair values and no quoted market values, as ownership is restricted to member institutions, and all transactions take place at par value with the FHLB or FRB as the only purchaser. Therefore, the Company accounts for these investments as long-term assets and carries them at cost. Management’s determination as to whether these investments are impaired is based on management’s assessment of the ultimate recoverability of the par value (cost) rather than recognizing temporary declines in fair value. In order to become a member of the Federal Reserve System, regulations require that the Company hold a certain amount of FRB capital stock. Additionally, investment in FHLB stock is required for membership in the FHLB system and in relation to the level of FHLB outstanding borrowings. Derivative Financial Instruments and Hedging Activities Derivative instruments are accounted for under the requirements of ASC Topic 815, “Derivatives and Hedging.” ASC Topic 815 requires companies to recognize all of their derivative instruments as either assets or liabilities in the consolidated balance sheets at fair value. The fair value of derivative positions outstanding is included in other assets and other liabilities in the accompanying consolidated balance sheets and in the net change in each of these financial statement line items in the accompanying consolidated statements of cash flows. The Company does not speculate using derivative instruments. Interest Rate Lock Commitments In the ordinary course of business, the Company enters into certain commitments with customers in connection with residential mortgage loan applications. Such commitments are considered derivatives under current accounting guidance and are required to be recorded at fair value. The change in fair value of these instruments is reflected currently in the mortgage banking revenue of the consolidated statements of income. The fair value of these derivatives is recorded on the consolidated balance sheets in other assets and other liabilities. Forward Sales Commitments The Company enters into forward sales commitments of mortgage-backed securities (“MBS”) with investors to mitigate the effect of the interest rate risk inherent in providing interest rate lock commitments to customers. During the period from commitment date to closing date, the Company is subject to the risk that market rates of interest may change. In an effort to mitigate such risk, forward delivery sales commitments, under which the Company agrees to deliver certain MBS, are established. These commitments are non-hedging derivatives in accordance with current accounting guidance and recorded at fair value, with changes in fair value reflected currently in the mortgage banking revenue of the consolidated statements of income. The fair value of these derivatives is recorded on the consolidated balance sheets in other assets and other liabilities. Interest Rate Swap, Floor, Cap, and Collar Agreements Not Designated as Hedging Derivatives The Company enters into interest rate swap, floor, cap and collar agreements on commercial loans with customers to meet the financing needs and interest rate risk management needs of its customers. At the same time, the Company enters into offsetting interest rate swap agreements with a financial institution in order to minimize the Company’s interest rate risk. These interest rate agreements are non-hedging derivatives and are recorded at fair value with changes in fair value reflected in noninterest income. The fair value of these derivatives is recorded on the consolidated balance sheets in other assets and other liabilities. Interest Rate Swap, Floor, Cap, and Collar Agreements Designated as Cash Flow Hedges Cash flow hedge relationships mitigate exposure to the variability of future cash flows or other forecasted transactions. The Company uses interest rate swaps, caps, collars, and floors to manage overall cash flow changes related to interest rate risk exposure on benchmark interest rate loans. The entire change in the fair value related to the derivative instrument is recognized as a component of other comprehensive income and subsequently reclassified into interest income when the forecasted transaction affects income. The Company assesses the effectiveness of hedging derivatives during the initial period with a quantitative test such as statistical regression on a prospective and retrospective basis. For subsequent periods, the effectiveness of hedging derivatives is assessed qualitatively by assuring the notional amounts of the respective derivative instruments are equal to or less than the current balance of the hedged items. Foreign Currency Contracts The Company enters into certain foreign currency exchange contracts on behalf of its clients to facilitate their risk management strategies, while at the same time entering into offsetting foreign currency exchange contracts in order to minimize the Company’s foreign currency exchange risk. The contracts are short term in nature, and any gain or loss incurred at settlement is recorded as other noninterest income or other noninterest expense. The fair value of these contracts is reported in other assets and other liabilities. The Company does not apply hedge accounting to these contracts. Counterparty Credit Risk Derivative contracts involve the risk of dealing with both bank customers and institutional derivative counterparties and their ability to meet contractual terms. Under Company policy, institutional counterparties must be approved by the Company’s Asset/Liability Management Committee. The Company’s credit exposure on derivatives is limited to the net fair value for each counterparty. Refer to Note 7 for further discussion and details of derivative financial instruments and hedging activities. Transfers of Financial Assets Transfers of financials assets are accounted for as sales when control over the transferred assets is surrendered. Control is generally considered to have been surrendered when 1) the transferred assets are legally isolated from the Company or its consolidated affiliates, even in bankruptcy or other receivership, 2) the transferee has the right to pledge or exchange the assets with no conditions that constrain the transferee and provide more than a trivial benefit to the Company, and 3) the Company does not maintain the obligation or unilateral ability to reclaim or repurchase the assets. If these sale criteria are met, the transferred assets are removed from the Company’s balance sheet and a gain or loss on sale is recognized. If not met, the transfer is recorded as a secured borrowing, and the assets remain on the Company’s balance sheet, the proceeds from the transaction are recognized as a liability, and gain or loss on sale is deferred until the sale criterion are achieved. All transfers of financial assets in the reported periods have qualified and been recorded as sales. Loans Held for Sale Mortgage Loans Held for Sale Mortgage loans originated and intended for sale in the secondary market are carried at the lower of cost or estimated fair value in the aggregate. The Company also transfers certain mortgage loans to held for sale when management has the intent to sell the loan or a portion of the loan in the near term. These held for sale loans are recorded at the lower of cost or estimated fair value. At the time of transfer, write-downs on the loans are recorded as charge-offs and a new cost basis is established. Generally, loans in this category are sold within thirty days. These loans are primarily sold with the mortgage servicing rights released. Fees on mortgage loans sold individually in the secondary market, including origination fees, service release premiums, processing and administrative fees, and application fees, are recognized as mortgage banking revenue in the period in which the loans are sold. These loans are underwritten to the standards of upstream correspondents and are held on the Company’s consolidated balance sheets until the loans are sold. Buyers generally have recourse to return a purchased loan to the Company under limited circumstances. Recourse conditions may include early payment default, breach of representations or warranties, and documentation deficiencies. During 2018, 2017 and 2016, an insignificant number of loans were returned to the Company. Commercial Loans Held for Sale The Company originates certain commercial loans for which a portion is intended for sale. The Company also transfers certain commercial loans to held for sale when management has the intent to sell the loan or a portion of the loan in the near term. These held for sale loans are recorded at the lower of cost or estimated fair value. At the time of transfer, write-downs on the loans are recorded as charge-offs and a new cost basis is established. Any subsequent lower of cost or market adjustment is determined on an individual loan basis and is recognized as a valuation allowance with any charges included in other noninterest expense. Gains and losses on the sale of these loans are included in other noninterest income when realized. A summary of the loans held for sale at December 31, 2018 and 2017 is as follows: As of December 31, (In thousands) 2018 2017 Mortgage loans held for sale $ 17,004 $ 5,834 Commercial loans held for sale 42,457 55,525 Loans held for sale $ 59,461 $ 61,359 Loans (Excluding Acquired Credit Impaired Loans) Loans include loans that are originated by the Company and acquired loans that are not considered impaired at acquisition. Loans originated by the Company are carried at the principal amount outstanding adjusted for the allowance for credit losses, net of deferred origination fees, and unamortized discounts and premiums. Interest income is recognized based on the principal balance outstanding and the stated rate of the loan. Loan origination fees and certain direct origination costs are capitalized and recognized as an adjustment of the yield on the related loan. Loans acquired through acquisition are initially recorded at fair value. Discounts and premiums created when the loans were recorded at their estimated fair values at acquisition are accreted over the remaining term of the loan as an adjustment to the related loan’s yield. Commercial loans, including small business loans, are generally placed on nonaccrual status when principal or interest is past due ninety days or more unless the loan is well secured and in the process of collection, or when the loan is specifically determined to be impaired. Consumer loans, including residential first and second lien loans secured by real estate, are generally placed on nonaccrual status when they are 120 or more days past due. The accrual of interest, as well as the amortization/accretion of any remaining unamortized net deferred fees or costs and discount or premium, is generally discontinued at the time the loan is placed on nonaccrual status. All accrued but uncollected interest for loans that are placed on nonaccrual status is reversed through interest income. Cash receipts received on nonaccrual loans are generally applied against principal until the loan has been collected in full, after which time any additional cash receipts are recognized as interest income (i.e., cost recovery method). However, interest may be accounted for under the cash-basis method as long as the remaining recorded investment in the loan is deemed fully collectible. Loans are evaluated for potential charge-off in accordance with the parameters discussed below or when the loan is placed on non-accrual status, whichever is earlier. Loans within the commercial portfolio are generally evaluated for charge-off at 90 days past due, unless both well-secured and in the process of collection. Closed and open-end residential mortgage and consumer loans are evaluated for charge-off no later than 120 days past due. Any outstanding loan balance in excess of the fair value of the collateral less costs to sell is charged-off no later than 180 days past due for loans secured by real estate. For non-real estate secured loans, in lieu of charging off the entire loan balance, loans may be written down to the fair value of the collateral less costs to sell if repossession of collateral is assured and in process. A loan is considered to be impaired when it appears probable that the entire amount contractually due will not be collected in accordance with the terms of the loan agreement. Factors considered in determining impairment include payment status, collateral values, and the probability of collecting scheduled payments of principal and interest when due. The measurement of impaired loans is based on the present value of expected future cash flows discounted at the loan’s effective interest rate or the loan’s observable market price, or based on the fair value of the collateral less disposal costs if the loan is collateral dependent. Included in impaired loans are loans considered troubled debt restructurings (“TDRs”). The Company attempts to work with borrowers when necessary to extend or modify loan terms to better align with the borrower’s ability to repay. Extensions and modifications to loans are made in accordance with internal policies and guidelines which conform to regulatory guidance. A modification is classified as a TDR if the borrower is experiencing financial difficulty and it is determined that the Company has granted a concession to the borrower. The Company may determine that a borrower is experiencing financial difficulty if the borrower is currently in default on any of its debt, or if it is probable that a borrower may default in the foreseeable future without the modification. Concessions could include reductions of interest rates at a rate lower than current market rate for a new loan with similar risk, extension of the maturity date, reduction of accrued interest, principal forgiveness, forbearance, or other concessions. The assessments of whether a borrower is experiencing or will likely experience financial difficulty and whether a concession has been granted can be subjective in nature, and management’s judgment is required when determining whether a modification is classified as a TDR. Allowance for Credit Losses The allowance for credit losses (“ACL”) is established through charges to income in the form of a provision for credit losses. The ACL is maintained at a level that management believes is adequate to absorb all probable losses inherent in the loan portfolio which are incurred as of the reporting date. Events that are not within the Company’s control, such as changes in economic factors, could change subsequent to the reporting date and could cause the ACL to be overstated or understated. The amount of the ACL is affected by loan charge-offs, which decrease the ACL; recoveries on loans previously charged off, which increase the ACL; and the provision for credit losses charged to income, which increases the ACL. In determining the provision for credit losses, management monitors fluctuations in the ACL resulting from actual charge-offs and recoveries and reviews the size and composition of the loan portfolio in light of current and anticipated economic conditions. The ACL is comprised of the following four components: • Specific reserves are recorded on loans reviewed individually for impairment. Generally, all loans that are individually identified as impaired are reviewed on a quarterly basis in order to determine whether a specific reserve is required. A loan is considered impaired when, based on current information, it is probable that we will not receive all amounts due in accordance with the contractual terms of the loan agreement. Once a loan has been identified as impaired, management measures impairment in accordance with ASC Topic 310, “Receivables.” The measurement of impaired loans is based on the present value of expected future cash flows discounted at the loan’s effective interest rate or the loan’s observable market price or based on the fair value of the collateral if the loan is collateral dependent. When management’s measured value of the impaired loan is less than the recorded investment in the loan, the amount of the impairment is recorded as a specific reserve. These specific reserves are determined on an individual loan basis based on management’s current evaluation of the loss exposure for each credit, given the payment status, the financial condition of the borrower and any guarantors and the value of any underlying collateral. Loans that are individually identified as impaired are excluded from the general reserve calculation described below. Changes in specific reserves from period to period are the result of changes in the circumstances of individual loans such as charge-offs, payments received, changes in collateral values or other factors. • For loans not considered to be impaired, a general reserve is maintained for each loan segment in the loan portfolio. Due to the growth of the credit portfolio into new geographic areas and into new commercial segmentations and the lack of seasoning of the portfolio, the Company recognizes there is limited historical loss information to adequately estimate loss rates based primarily on historical loss data. Therefore, external loss data was acquired from the research arm of a nationally recognized risk rating agency to act as a proxy for loss rates within the ACL model until sufficient loss history can be accumulated from the Company’s loss experience in these segments. These loss rates were developed specifically for the Company’s customer risk profile and portfolio mix. The Company monitors actual loss experience for each loan segment for adjustments required to the loss rates utilized. • In assessing the overall risk of the credit portfolio, the ACL Committee also considers the following qualitative factors that may affect credit losses within the current credit portfolio. Management discretion dictates how these factors should affect certain segments (or the entire portfolio) according to a number of basis points to be added to (or subtracted from) loan loss rates. By their nature, qualitative adjustments attempt to quantify and standardize factors that serve as “leading indicators” of credit deterioration or improvement. These primary adjustment factors include, but are not limited to the following: • Lending policies, procedures, practices or philosophy, including underwriting standards and collection, charge-off and recovery practices • Changes in national and service market economic and business conditions that could affect the level of default rates or the level of losses once a default has occurred within the Bank’s existing loan portfolio • Changes in the nature or size of the portfolio • Changes in portfolio collateral values • Changes in the experience, ability, and depth of lending management and other relevant staff • Volume and/or severity of past due and classified credits or trends in the volume of losses, non-accrual credits, impaired credits and other credit modifications • Quality of the institution’s credit review system and processes and the degree of oversight by bank management and the board of directors • Concentrations of credit such as industry and lines of business • Competition and legal and regulatory requirements or other external factors. • In connection with acquisitions (see Accounting for Acquired Loans Management presents the quarterly review of the ACL to the Bank’s Board of Directors.. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available or as events change. The reserve for unfunded commitments is determined by assessing three distinct components: unfunded commitment volatility in the portfolio (excluding commitments related to letters of credit and commitment letters), adverse letters of credit, and adverse lines of credit. Unfunded commitment volatility is calculated on a trailing eight quarter basis; the resulting expected funding amount is then reserved for based on the current combined reserve rate of the pass-rated originated and ANCI loans. Adverse lines and letters of credit are assessed individually based on funding and loss expectations as of the period end. The reserve for unfunded commitments is recorded in other liabilities and other noninterest expense separate from the allowance and provision for credit losses. As of December 31, 2018, and 2017, the reserve for unfunded commitments totaled $0.6 million and $0.8 million, respectively. Accounting for Acquired Loans Acquired Loans The Company accounts for its acquisitions under ASC Topic 805, which requires the use of the acquisition method of accounting. All identifiable assets acquired, including loans, are recorded at fair value. No ACL related to the acquired loans is recorded on the acquisition date as the fair value of the loans acquired incorporates assumptions regarding credit risk. Loans acquired are recorded at fair value in accordance with the fair value methodology prescribed in ASC Topic 820. The fair value estimates associated with the loans include estimates related to the amount and timing of undiscounted expected principal, interest and other cash flows, as well as the appropriate discount rate. At the time of acquisition, the Company estimated the fair value of the total acquired loan portfolio by segregating the portfolio into loan pools with similar characteristics and certain specifically-reviewed non-homogeneous loans. The similar characteristics used to establish the pools included: • Risk rating, • The loan type based on regulatory reporting guidelines; namely whether the loan was a residential, construction, consumer, or commercial loan, and • The nature of collateral. From these pools, the Company used certain loan information, including outstanding principal balance, estimated probability of default and loss given default, weighted average maturity, weighted average term to re-price (if a variable rate loan), estimated prepayment rates, and weighted average interest rate to estimate the expected cash flow for each loan pool. For the specifically-reviewed loans expected cash flows were determined for each loan based on current performance and collateral values, if the loan is collateral dependent. The Company accounts for and evaluates acquired credit impaired (“ACI”) loans in accordance with the provisions of ASC Topic 310-30. When ACI loans exhibit evidence of credit deterioration since origination and it is probable at the date of acquisition that the Company will not collect all principal and interest payments in accordance with the terms of the loan agreement, the expected shortfall in future cash flows, as compared to the contractual amount due, is recognized as a non-accretable discount. Any excess of expected cash flows over the acquisition date fair value is known as the accretable discount and is recognized as accretion income over the life of each pool or individual loan. ACI loans that meet the criteria for non-accrual of interest at the time of acquisition may be considered performing upon acquisition, regardless of whether the customer is contractually delinquent, if the timing and expected cash flows on such loans can be reasonably estimated and if collection of the new carrying value of such loans is expected. However, if the timing or amount of the expected cash flows cannot be reasonably estimated an ACI loan may be placed in nonaccruing status. Expected cash flows over the acquisition date fair value are periodically re-estimated utilizing the same cash flow methodology used at the time of acquisition and subsequent decreases to the expected cash flows will generally result in a provision for loan losses charge to the Company’s consolidated statements of income. Conversely, subsequent increases in expected cash flows result in a transfer from the non-accretable discount to the accretable discount, which would have a positive impact on accretion income prospectively. These cash flow evaluations are inherently subjective as they require material estimates, all of which may be susceptible to significant change. Premises and Equipment Premises and equipment are stated at cost, less accumulated depreciation and amortization. Depreciation and amortization are determined using the straight-line method at rates calculated to depreciate or amortize the cost of assets over their estimated useful lives. Maintenance and repairs of property and equipment are charged to expense, and major improvements that extend the useful life of the asset are capitalized. Upon retirement, sale, or other disposition of property and equipment, the cost and accumulated depreciation are eliminated from the accounts, and any gains or losses are included in income. The Company leases various premises and equipment under operating leases. The leases have varying terms, with most containing renewal or first-right-of-refusal options for multi-year periods and annual increases in base rates. Leasehold improvements are depreciated over the lesser of the estimated useful life or the lease term. Other Real Estate Other real estate (“OREO”) consists of properties acquired through foreclosure and unutilized bank-owned properties. These properties, as held for sale properties, are recorded at fair value, less estimated costs to sell, on the date of foreclosure establishing a new cost basis for the property. Subsequent to the foreclosure date the OREO is maintained at the lower of cost or fair value. Any write-down to fair value required at the time of foreclosure is charged to the ACL. Subsequent gains or losses resulting from the sale of the property or additional valuation allowances required due to further declines in fair value are reported in other noninterest expense. The amount of loans in the process of foreclosure or physical possession for single-family residential properties was $3.8 million and $4.4 million as of December 31, 2018 and 2017, respectively. The amount of residential real estate properties held in OREO was $0.9 million and $2.7 million as of December 31, 2018 and 2017, respectively. Cash Surrender Value of Life Insurance The Company invests in bank-owned life insurance (“BOLI”), which involves the purchasing of life insurance on selected employees. The Company is the owner of the policies and, accordingly, the cash surrender value of the policies is included in total assets, and increases in cash surrender values are reported as income in the consolidated statements of income. The cash value accumulation on BOLI is permanently tax deferred if the policy is held to the insured person’s death and certain other conditions are met. Goodwill and Other Intangible Assets Goodwill is accounted fo

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	Note 2—Subsequent Events Completion of Merger with State Bank Financial Corporation On January 1, 2019, the Company completed its previously announced merger with State Bank Financial Corporation ("State Bank") whereby State Bank merged with and into the Company. Immediately following the merger, State Bank’s wholly owned subsidiary bank, State Bank and Trust Company, merged with and into the Company’s subsidiary bank, Cadence Bank, N.A. Under the terms of the agreement, each outstanding share of State Bank common stock was exchanged for 1.271 shares of Company Class A common stock. The purchase price was approximately $826 million and was comprised solely of stock consideration. The Company’s primary reasons for the transaction were to expand its market presence and create a more diverse business mix as well as an attractive funding base and leverage operating cost through economies of scale. During 2018, the Company incurred approximately $3.0 million of acquisition costs related to this transaction. These acquisition costs are reported in merger related expenses on the Company’s Consolidated Statements of Income and Comprehensive Income. The majority of the acquisition costs for this transaction are expected to be recorded during the first half of 2019. Additional disclosures required by ASC 805 have been omitted because the information needed for the disclosures is not available due to the close proximity of the closing of this transaction with the date these financial statements are being issued. State Bank, which is headquartered in Atlanta, Georgia, operated 32 banking locations throughout Georgia. As of December 31, 2018, State Bank had total assets of $4.9 billion, total loans of $3.4 billion and total deposits of $4.1 million as reported in their regulatory filings. Equity-Based Compensation Subsequent to year end, the Company granted equity-based awards to select executives. Restricted stock units totaling 657,998 shares were granted, of which a portion time vest over a 3-year period and the remaining units vest based on the attainment of certain performance goals over a 3 – 4 year period. Additionally, options were granted to purchase approximately 1.6 million shares of the Company’s common stock at a weighted average price of $20.43 and which will vest over a 3-year period. Quarterly Dividend Approval On January 22, 2019, the Company’s Board of Directors declared a quarterly cash dividend in the amount of $0.175 per share of outstanding common stock, representing an annualized dividend of $0.70 per share. The dividend will be paid on March 15, 2019 to holders of record of Cadence’s Class A common stock on March 1, 2019. Share Repurchases In October 2018, the Company’s Board of Directors authorized a share repurchase program in an amount of up to $50 million as part of the Company’s overall capital management strategies. In December 2018, the Board approved an amendment to the repurchase program providing for the purchase of up to 4.3 million shares not to exceed an aggregate purchase of $81 million, subject to receipt of required regulatory approvals. In January and February of 2019, the Company repurchased approximately 1.8 million shares of common stock at a cost of $34.5 million. New Derivative Agreement As discussed in Note 1, the Company uses various derivative instruments to manage its interest rate risk. In February 2019, the Company entered into a $4.0 billion notional interest rate collar with a five-year term. The interest rate collar has a purchased cap strike of 4.70%, a sold cap strike of 3.50%, a sold floor strike of 0.00%, and a purchased floor strike of 3.00%. The purchased option price was $127.8 million.

Securities

Securities	12 Months Ended
	Dec. 31, 2018
Investments Debt And Equity Securities [Abstract]
Securities	Note 3—Securities A summary of amortized cost and estimated fair value of securities available-for-sale and securities held-to-maturity at December 31, 2018 and 2017 is as follows: (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value December 31, 2018 Securities available-for-sale: U.S. Treasury securities $ 100,413 $ — $ 3,628 $ 96,785 Obligations of U.S. government agencies 60,975 316 284 61,007 Mortgage-backed securities issued or guaranteed by U.S. agencies (MBS) Residential pass-through: Guaranteed by GNMA 85,052 146 2,093 83,105 Issued by FNMA and FHLMC 594,874 694 10,367 585,201 Other residential mortgage-backed securities 36,339 8 1,178 35,169 Commercial mortgage-backed securities 114,383 287 5,255 109,415 Total MBS 830,648 1,135 18,893 812,890 Obligations of states and municipal subdivisions 229,475 207 13,112 216,570 Total securities available-for-sale $ 1,221,511 $ 1,658 $ 35,917 $ 1,187,252 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value December 31, 2017 Securities available-for-sale: U.S. Treasury securities $ 100,575 $ — $ 3,731 $ 96,844 Obligations of U.S. government agencies 80,552 738 66 81,224 Mortgage-backed securities issued or guaranteed by U.S. agencies (MBS) Residential pass-through: Guaranteed by GNMA 106,461 676 1,110 106,027 Issued by FNMA and FHLMC 431,409 1,284 2,271 430,422 Other residential mortgage-backed securities 47,379 97 1,084 46,392 Commercial mortgage-backed securities 76,201 63 4,069 72,195 Total MBS 661,450 2,120 8,534 655,036 Obligations of states and municipal subdivisions 420,111 7,539 3,691 423,959 Total securities available-for-sale $ 1,262,688 $ 10,397 $ 16,022 $ 1,257,063 Securities held-to-maturity: Obligations of states and municipal subdivisions $ 290 $ 21 $ — $ 311 The scheduled contractual maturities of securities available-for-sale and debt securities held-to-maturity at December 31, 2018 were as follows: Available-for-Sale Amortized Estimated (In thousands) Cost Fair Value Due in one year or less $ — $ — Due after one year through five years 107,283 103,638 Due after five years through ten years 53,314 53,568 Due after ten years 230,266 217,156 Mortgage-backed securities 830,648 812,890 Total $ 1,221,511 $ 1,187,252 Proceeds from sales, gross gains, and gross losses on sales of securities available-for-sale for the years ended December 31, 2018, 2017 and 2016 are presented below. There were no other-than-temporary impairment charges included in gross realized losses for the years ended December 31, 2018, 2017 and 2016. The specific identification method is used to reclassify gains and losses out of other comprehensive income at the time of sale. For the Year Ended December 31, (In thousands) 2018 2017 2016 Gross realized gains $ 816 $ 167 $ 4,172 Gross realized losses (2,669 ) (313 ) (436 ) Realized (losses) gains on sale of securities available for sale, net $ (1,853 ) $ (146 ) $ 3,736 Proceeds from sales of securities available-for-sale $ 268,799 $ 161,401 $ 538,960 Securities with a carrying value of $711.2 million and $507.3 million at December 31, 2018 and 2017, respectively, were pledged to secure public deposits, FHLB borrowings, repurchase agreements and for other purposes as required or permitted by law. Information pertaining to securities available-for-sale with gross unrealized losses aggregated by category and length of time the securities have been in a continuous loss position was as follows: Unrealized loss analysis Losses < 12 Months Losses > 12 Months Gross Gross Estimated Unrealized Estimated Unrealized (In thousands) Fair Value Losses Fair Value Losses December 31, 2018 U.S. Treasury securities $ — $ — $ 96,785 $ 3,628 Obligations of U.S. government agencies 25,978 183 10,152 101 Mortgage-backed securities 259,794 2,864 405,974 16,029 Obligations of states and municipal subdivisions 74,503 2,501 125,092 10,611 Total $ 360,275 $ 5,548 $ 638,003 $ 30,369 Unrealized loss analysis Losses < 12 Months Losses > 12 Months Gross Gross Estimated Unrealized Estimated Unrealized (In thousands) Fair Value Losses Fair Value Losses December 31, 2017 U.S. Treasury securities $ — $ — $ 96,844 $ 3,731 Obligations of U.S. government agencies 1,577 9 14,323 57 Mortgage-backed securities 306,274 1,490 172,324 7,044 Obligations of states and municipal subdivisions 2,601 22 134,870 3,669 Total $ 310,452 $ 1,521 $ 418,361 $ 14,501 As of December 31, 2018 and 2017, approximately 84% and 58%, respectively, of the fair value of securities in the investment portfolio reflected an unrealized loss. As of December 31, 2018, there were 117 securities that had been in a loss position for more than twelve months, and 100 securities that had been in a loss position for less than 12 months. The unrealized losses result from the change in market interest rates for similar securities and do not relate to the marketability of the securities or the issuer’s ability to repay the obligations. The Company has adequate liquidity and, therefore, does not plan to sell and, more likely than not, will not be required to sell these securities before recovery of the indicated impairment. Accordingly, the unrealized losses on these securities have been determined to be temporary. In the second quarter of 2018, we sold approximately $187.8 million of available-for-sale securities as part of an effort to rebalance the portfolio. We reduced our target concentration of tax free municipal securities from 35% down to 25%.

Loans and Allowance for Credit

Loans and Allowance for Credit Losses	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Loans and Allowance for Credit Losses	Note 4—Loans and Allowance for Credit Losses The following table presents total loans outstanding by portfolio segment and class of financing receivable as of December 31, 2018 and 2017, respectively. Outstanding balances include originated loans, Acquired Noncredit Impaired (“ANCI”) loans and Acquired Credit Impaired (“ACI”) loans. Information about ACI loans is presented separately in the “Acquired Credit-Impaired Loans” section of this Note. As of (In thousands) December 31, 2018 December 31, 2017 Commercial and Industrial General C&I $ 3,275,362 $ 2,746,454 Energy sector 1,285,775 935,371 Restaurant industry 1,096,366 1,035,538 Healthcare 539,839 416,423 Total commercial and industrial 6,197,342 5,133,786 Commercial Real Estate Income producing 1,266,791 1,082,929 Land and development 63,948 75,472 Total commercial real estate 1,330,739 1,158,401 Consumer Residential real estate 2,227,653 1,690,814 Other 67,100 74,922 Total consumer 2,294,753 1,765,736 Small Business Lending 266,283 221,855 Total (Gross of unearned discount and fees) 10,089,117 8,279,778 Unearned discount and fees (35,194 ) (26,351 ) Total (Net of unearned discount and fees) $ 10,053,923 $ 8,253,427 During 2018, the Company purchased $214 million of consumer residential real estate loans, at a premium of approximately 6.0%. These loans were evaluated and determined not to be credit impaired before purchase and are classified as ANCI as of December 31, 2018. Allowance for Credit Losses (“ACL”) The ACL is management’s estimate of credit losses inherent in the loan portfolio at the balance sheet date. The Company has an established process to determine the adequacy of the ACL that assesses the losses inherent in our portfolio. While management attributes portions of the ACL to specific portfolio segments, the entire ACL is available to absorb credit losses inherent in the total loan portfolio. The ACL process involves procedures that appropriately consider the unique risk characteristics of the loan portfolio segments based on management’s assessment of the underlying risks and cash flows. For each portfolio segment, losses are estimated collectively for groups of loans with similar characteristics, individually for impaired loans or, for ACI loans, based on the changes in cash flows expected to be collected on a pool or individual basis. The level of the ACL is influenced by loan volumes, risk rating migration, historic loss experience influencing loss factors, and other conditions influencing loss expectations, such as economic conditions. The primary indicator of credit quality for the portfolio segments is its internal risk ratings. The assignment of loan risk ratings is the primary responsibility of the lending officer concurrent with approval from the credit officer reviewing and recommending approval of the credit. Additionally, there is independent review by internal credit review, which also performs ongoing, independent review of the risk management process. The risk management process includes underwriting, documentation and collateral control. Credit review is centralized and independent of the lending function. The credit review results are reported to senior management and the Board of Directors. The following is a summary description of the risk ratings. Tables summarizing the amount of loans by criticized or classified risk rating in each loan portfolio segment is included in the sections “Credit Exposure in the Originated and ANCI Loan Portfolios” and “Credit Exposure in the ACI Portfolio.” • Pass— For loans within this risk rating, the condition of the borrower and the performance of the loan is satisfactory or better. • Special Mention— A special mention loan has identified potential weaknesses that are of sufficient materiality to require management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or in the Bank’s credit position at some future date. Special mention assets contain greater than acceptable risk to warrant increases in credit exposure and are thus considered non-pass rated credits. • Substandard — A substandard loan is inadequately protected by the current net worth and paying capacity of the obligor or the collateral pledged, if any. Loans classified as substandard possess well-defined weaknesses that are expected to jeopardize their liquidation. Loans in this category may be either on accrual status or nonaccrual status. • Doubtful— Loans classified as doubtful possess all of the weaknesses inherent in loans classified as substandard with the added characteristic that the weaknesses make collection or liquidation in full highly questionable or improbable based on currently existing facts, conditions and values. Loans rated as doubtful are not rated as loss because certain events may occur that could salvage the debt. Loans in this category are required to be on nonaccrual. • Loss —Loans classified loss are considered uncollectable and of such little value that their continuance as bankable assets is not warranted. This classification does not mean that the asset has absolutely no recovery or salvage value, but rather that it is not practical or desirable to defer writing off this worthless loan even though partial recovery may be affected in the future. Loans may reside in this classification for administrative purposes for a period not to exceed the earlier of thirty (30) days or calendar quarter-end. A summary of the activity in the ACL for each of the three years in the period ended December 31, 2018 is as follows: For the Year Ended December 31, 2018 (In thousands) Commercial and Industrial Commercial Real Estate Consumer Small Business Total As of December 31, 2017 $ 55,919 $ 11,990 $ 14,983 $ 4,684 $ 87,576 Provision for loan losses 15,708 (1,837 ) (900 ) (271 ) 12,700 Charge-offs (6,709 ) (2 ) (716 ) (618 ) (8,045 ) Recoveries 1,398 301 336 112 2,147 As of December 31, 2018 $ 66,316 $ 10,452 $ 13,703 $ 3,907 $ 94,378 Allocation of ending ACL ACI loans collectively evaluated for impairment $ 58 $ 1,641 $ 6,018 $ — $ 7,717 ACI loans individually evaluated for impairment — — 207 — 207 ANCI loans collectively evaluated for impairment 293 53 535 58 939 ANCI loans individually evaluated for impairment — — 6 107 113 Originated loans collectively evaluated for impairment 58,665 8,758 6,918 3,742 78,083 Originated loans individually evaluated for impairment 7,300 — 19 — 7,319 ACL as of December 31, 2018 $ 66,316 $ 10,452 $ 13,703 $ 3,907 $ 94,378 Loans ACI loans collectively evaluated for impairment $ 13,018 $ 58,171 $ 120,717 $ — $ 191,906 ACI loans individually evaluated for impairment 3,789 7,256 324 — 11,369 ANCI loans collectively evaluated for impairment 50,469 7,808 280,776 8,462 347,515 ANCI loans individually evaluated for impairment — — 1,538 279 1,817 Originated loans collectively evaluated for impairment 6,053,264 1,257,504 1,891,144 257,542 9,459,454 Originated loans individually evaluated for impairment 76,802 — 254 — 77,056 Loans as of December 31, 2018 $ 6,197,342 $ 1,330,739 $ 2,294,753 $ 266,283 $ 10,089,117 For the Year Ended December 31, 2017 (In thousands) Commercial and Industrial Commercial Real Estate Consumer Small Business Total As of December 31, 2016 $ 54,688 $ 10,103 $ 13,265 $ 4,212 $ 82,268 Provision for loan losses 5,883 1,737 1,746 369 9,735 Charge-offs (5,645 ) (93 ) (929 ) (204 ) (6,871 ) Recoveries 993 243 901 307 2,444 As of December 31, 2017 $ 55,919 $ 11,990 $ 14,983 $ 4,684 $ 87,576 Allocation of ending ACL ACI loans collectively evaluated for impairment $ 5 $ 2,006 $ 6,289 $ — $ 8,300 ACI loans individually evaluated for impairment — 4 220 — 224 ANCI loans collectively evaluated for impairment 864 130 49 295 1,338 ANCI loans individually evaluated for impairment — — 36 22 58 Originated loans collectively evaluated for impairment 46,591 9,850 8,389 4,362 69,192 Originated loans individually evaluated for impairment 8,459 — — 5 8,464 ACL as of December 31, 2017 $ 55,919 $ 11,990 $ 14,983 $ 4,684 $ 87,576 Loans ACI loans collectively evaluated for impairment $ 19,486 $ 71,675 $ 150,798 $ — $ 241,959 ACI loans individually evaluated for impairment 10,091 8,186 324 — 18,601 ANCI loans collectively evaluated for impairment 58,775 15,926 113,357 11,331 199,389 ANCI loans individually evaluated for impairment — — 1,582 310 1,892 Originated loans collectively evaluated for impairment 4,974,973 1,062,614 1,499,260 209,627 7,746,474 Originated loans individually evaluated for impairment 70,461 — 415 587 71,463 Loans as of December 31, 2017 $ 5,133,786 $ 1,158,401 $ 1,765,736 $ 221,855 $ 8,279,778 For the Year Ended December 31, 2016 (In thousands) Commercial and Industrial Commercial Real Estate Consumer Small Business Total As of December 31, 2015 $ 55,824 $ 8,136 $ 13,450 $ 2,373 $ 79,783 Provision for loan losses 43,782 1,389 1,506 2,671 49,348 Charge-offs (46,367 ) — (2,094 ) (841 ) (49,302 ) Recoveries 1,449 578 403 9 2,439 As of December 31, 2016 $ 54,688 $ 10,103 $ 13,265 $ 4,212 $ 82,268 Allocation of ending ACL ACI loans collectively evaluated for impairment $ 176 $ 2,652 $ 7,215 $ — $ 10,043 ACI loans individually evaluated for impairment — 3 232 — 235 ANCI loans collectively evaluated for impairment 299 243 94 272 908 ANCI loans individually evaluated for impairment — — 37 33 70 Originated loans collectively evaluated for impairment 52,615 7,205 5,687 3,900 69,407 Originated loans individually evaluated for impairment 1,598 — — 7 1,605 ACL as of December 31, 2016 $ 54,688 $ 10,103 $ 13,265 $ 4,212 $ 82,268 Impaired Originated and ANCI Loans Including TDRs The following includes certain key information about individually impaired loans as of December 31, 2018 and 2017. Originated and ANCI Loans Identified as Impaired As of December 31, 2018 (In thousands) Recorded Investment in Impaired Loans (1) Unpaid Principal Balance Related Specific Allowance Nonaccrual Loans Included in Impaired Loans Undisbursed Commitments With no related allowance for credit losses Commercial and Industrial Energy sector $ 20,713 $ 33,908 $ — $ 20,713 $ 3,658 Total commercial and industrial 20,713 33,908 — 20,713 3,658 Consumer Residential real estate 1,538 1,535 — — — Total consumer 1,538 1,535 — — — Total $ 22,251 $ 35,443 $ — $ 20,713 $ 3,658 With allowance for credit losses recorded Commercial and Industrial General C&I $ 28,684 $ 28,677 $ 3,559 $ 24,103 $ 930 Restaurant industry 23,043 23,698 3,485 22,042 2,329 Healthcare 4,496 4,496 256 4,496 - Total commercial and industrial 56,223 56,871 7,300 50,641 3,259 Consumer Other 254 254 25 — — Total consumer 254 254 25 — — Small Business Lending 476 1,249 107 229 10 Total $ 56,953 $ 58,374 $ 7,432 $ 50,870 $ 3,269 As of December 31, 2017 (In thousands) Recorded Investment in Impaired Loans (1) Unpaid Principal Balance Related Specific Allowance Nonaccrual Loans Included in Impaired Loans Undisbursed Commitments With no related allowance for credit losses Commercial and Industrial General C&I $ 5,010 $ 4,994 $ — $ 192 $ — Energy sector 14,822 23,307 — 14,822 387 Total commercial and industrial 19,832 28,301 — 15,014 387 Consumer Residential real estate 1,093 1,097 — 35 — Other 416 415 — — — Total consumer 1,509 1,512 — 35 — Small Business Lending 249 695 — 249 — Total $ 21,590 $ 30,508 $ — $ 15,298 $ 387 With allowance for credit losses recorded Commercial and Industrial Energy sector $ 39,857 $ 43,416 $ 8,353 $ 28,000 $ 402 Restaurant industry 11,017 10,969 106 — 2,500 Total commercial and industrial 50,874 54,385 8,459 28,000 2,902 Consumer Residential real estate 496 494 36 — — Small Business Lending 650 921 27 60 — Total $ 52,020 $ 55,800 $ 8,522 $ 28,060 $ 2,902 (1) The recorded investment of a loan also includes any interest receivable, net unearned discount or fees, and unamortized premium or discount. The related amount of interest income recognized for impaired loans was $0.3 million for the year ended December 31, 2018, compared to $1.6 million and $1.4 million for the same periods in 2017 and 2016, respectively. Generally, cash receipts on nonperforming loans are used to reduce principal rather than recorded as interest income. Past due status is determined based upon contractual terms. A nonaccrual loan may be returned to accrual status when repayment is reasonably assured and there has been demonstrated performance under the terms of the loan or, if applicable, under the terms of the restructured loan. Approximately $1.7 million of contractual interest paid was recognized on the cash basis for the year ended December 31, 2018, compared to $1.5 million and $1.1 million for same periods in 2017 and 2016, respectively. Average Recorded Investment in Impaired Originated and ANCI Loans Year Ended December 31, (In thousands) 2018 2017 2016 Commercial and Industrial General C&I $ 10,834 $ 8,586 $ 11,291 Energy sector 27,348 108,751 158,192 Restaurant industry 16,600 2,203 — Healthcare 1,124 — — Total commercial and industrial 55,906 119,540 169,483 Consumer Residential real estate 1,557 1,426 1,206 Other 313 386 398 Total consumer 1,870 1,812 1,604 Small Business Lending 420 945 547 Total $ 58,196 $ 122,297 $ 171,634 Included in impaired loans are loans considered to be TDRs. The Company attempts to work with borrowers when necessary to extend or modify loan terms to better align with the borrower’s ability to repay. Extensions and modifications to loans are made in accordance with internal policies and guidelines which conform to regulatory guidance. Each occurrence is unique to the borrower and is evaluated separately. The Bank considers regulatory guidelines when restructuring loans to ensure that prudent lending practices are followed. Qualifying criteria and payment terms are structured by the borrower’s current and prospective ability to comply with the modified terms of the loan. A modification is classified as a TDR if the borrower is experiencing financial difficulty and it is determined that the Company has granted a concession to the borrower. The Company may determine that a borrower is experiencing financial difficulty if the borrower is currently in default on any of its debt, or if it is probable that a borrower may default in the foreseeable future without the modification. Concessions could include reductions of interest rates at a rate lower than current market rate for a new loan with similar risk, All TDRs are reported as impaired. Impaired classification may be removed if the borrower demonstrates compliance with the modified terms and the restructuring agreement specifies an interest rate equal to that which would be provided to a borrower with similar credit at the time of restructuring. The majority of TDRs are classified as impaired loans for the remaining life of the loan. Nonperforming loans and impaired loans are defined differently. Some loans may be included in both categories, whereas other loans may only be included in one category. The following tables provide information regarding loans modified into TDRs in the originated and ANCI portfolios for the periods indicated: Originated and ANCI Loans modified into TDRs For the Year Ended December 31, 2018 2017 2016 (In thousands) Number of TDRs Recorded Investment Number of TDRs Recorded Investment Number of TDRs Recorded Investment Commercial and Industrial 4 $ 30,244 3 $ 16,027 6 $ 43,609 Consumer — — 2 739 2 534 Small Business Lending 2 141 1 138 1 552 Total 6 $ 30,385 6 $ 16,904 9 $ 44,695 There were no TDRs experiencing payment default during the years ended December 31, 2017 and 2016. For the Year Ended December 31, 2018 2017 2016 Number of Loans Modified by: Rate Concession Modified Terms and/ or Other Concessions Rate Concession Modified Terms and/ or Other Concessions Forbearance Agreement Rate Concession Modified Terms and/ or Other Concessions Commercial and Industrial — 4 2 1 2 1 3 Consumer — — — 2 — — 2 Small Business Lending 2 — 1 — — 1 — Total 2 4 3 3 2 2 5 Residential Mortgage Loans in Process of Foreclosure Included in loans are $3.8 million and $4.4 million of consumer loans secured by single family residential real estate that are in process of foreclosure at December 31, 2018 and 2017, respectively. Loans in process of foreclosure include those for which formal foreclosure proceedings are in process according to local requirements of the applicable jurisdiction. In addition to the single family residential real estate loans in process of foreclosure, the Company also held $1.0 million and $2.7 million of foreclosed single family residential properties in other real estate owned as of December 31, 2018 and 2017. Credit Exposure in the Originated and ANCI Loan Portfolios The following provides information regarding the credit exposure by portfolio segment and class of receivable as of December 31, 2018 and 2017: As of December 31, 2018 (Recorded Investment in thousands) Special Mention Substandard Doubtful Total Criticized / Classified Commercial and Industrial General C&I $ 74,592 $ 79,815 $ — $ 154,407 Restaurant industry 24,449 26,171 — 50,620 Energy sector 11,812 6,227 14,486 32,525 Healthcare — 4,496 — 4,496 Total commercial and industrial 110,853 116,709 14,486 242,048 Commercial Real Estate Land and development — 985 — 985 Total commercial real estate — 985 — 985 Consumer (1) Residential real estate — 3,315 — 3,315 Total consumer — 3,315 — 3,315 Small Business Lending 772 2,013 — 2,785 Total $ 111,625 $ 123,022 $ 14,486 $ 249,133 (1) During the third quarter of 2018, the Company began determining the risk rating classification for its consumer portfolio based on delinquency and nonaccrual status in accordance with the Uniform Retail Credit Classification guidance, which contributed to a lower amount of criticized and classified loans from the previous periods. As of December 31, 2017 (Recorded Investment in thousands) Special Mention Substandard Doubtful Total Criticized / Classified Commercial and Industrial General C&I $ 80,550 $ 47,324 $ — $ 127,874 Restaurant industry 4,536 12,506 — 17,042 Energy sector — 99,979 7,634 107,613 Healthcare — 71 — 71 Total commercial and industrial 85,086 159,880 7,634 252,600 Commercial Real Estate Income producing — 26 — 26 Land and development 20 — — 20 Total commercial real estate 20 26 — 46 Consumer Residential real estate 7,610 12,416 — 20,026 Other 673 356 4 1,033 Total consumer 8,283 12,772 4 21,059 Small Business Lending 3,480 1,375 27 4,882 Total $ 96,869 $ 174,053 $ 7,665 $ 278,587 The following provides an aging of past due loans by portfolio segment and class of receivable as of December 31, 2018 and 2017: Aging of Past Due Originated and ANCI Loans As of December 31, 2018 Accruing Loans Non-Accruing Loans (Recorded Investment in thousands) 30-59 DPD 60-89 DPD 90+DPD 0-29 DPD 30-59 DPD 60-89 DPD 90+DPD Commercial and Industrial General C&I $ 120 $ — $ — $ 23,928 $ 176 $ — $ — Restaurant industry — — — 22,043 — — — Energy sector — — — 20,712 — — — Healthcare — — — 4,496 — — — Total commercial and industrial 120 — — 71,179 176 — — Commercial Real Estate Income producing — — — — — — — Land and development — 61 — — — — — Total commercial real estate — 61 — — — — — Consumer Residential real estate 1,275 315 760 876 151 95 1,429 Other 27 112 — — — — — Total consumer 1,302 427 760 876 151 95 1,429 Small Business Lending 491 25 — 250 29 4 50 Total $ 1,913 $ 513 $ 760 $ 72,305 $ 356 $ 99 $ 1,479 As of December 31, 2017 Accruing Loans Non-Accruing Loans (Recorded Investment in thousands) 30-59 DPD 60-89 DPD 90+DPD 0-29 DPD 30-59 DPD 60-89 DPD 90+DPD Commercial and Industrial General C&I $ 59 $ — $ 476 $ — $ 192 $ — $ — Energy sector — — — 32,315 — — 10,507 Healthcare — — — — 71 — — Total commercial and industrial 59 — 476 32,315 263 — 10,507 Commercial Real Estate Income producing — — 26 — — — — Land and development 55 — — — — — — Total commercial real estate 55 — 26 — — — — Consumer Residential real estate 3,191 1,030 325 1,070 173 293 2,205 Other 532 3 — — — — — Total consumer 3,723 1,033 325 1,070 173 293 2,205 Small Business Lending 931 328 — 110 38 — 494 Total $ 4,768 $ 1,361 $ 827 $ 33,495 $ 474 $ 293 $ 13,206 Acquired Credit Impaired (“ACI”) Loans The following table presents total ACI loans outstanding by portfolio segment and class of financing receivable as of December 31, 2018 and 2017. As of (In thousands) December 31, 2018 December 31, 2017 Commercial and Industrial General C&I $ 16,807 $ 23,428 Healthcare — 6,149 Total commercial and industrial 16,807 29,577 Commercial Real Estate Income producing 65,427 79,861 Total commercial real estate 65,427 79,861 Consumer Residential real estate 120,495 149,942 Other 546 1,180 Total consumer 121,041 151,122 Total $ 203,275 $ 260,560 The excess of cash flows expected to be collected over the carrying value of ACI loans is referred to as the accretable yield and is recognized in interest income using an effective yield method over the remaining life of the loan, or pools of loans. The accretable yield is affected by: • Changes in interest rate indices for variable rate ACI loans—Expected future cash flows are based on the variable rates in effect at the time of the regular evaluations of cash flows expected to be collected; • Changes in prepayment assumptions—Prepayments affect the estimated life of ACI loans which may change the amount of interest income, and possibly principal, expected to be collected; and • Changes in the expected principal and interest payments over the estimated life—Updates to expected cash flows are driven by the credit outlook and actions taken with borrowers. Changes in the amount of accretable discount for ACI loans for each of the years in the period ended December 31, 2018: Changes in Accretable Yield on ACI Loans For the Year Ended December 31, (In thousands) 2018 2017 2016 Balance at beginning of period $ 78,422 $ 98,728 $ 122,791 Maturities/payoff (7,456 ) (9,888 ) (11,563 ) Charge-offs (77 ) (129 ) (286 ) Foreclosure (436 ) (1,061 ) (1,041 ) Accretion (19,813 ) (23,303 ) (30,870 ) Reclass from nonaccretable difference due to increases in expected cash flow 16,765 14,075 19,697 Balance at end of period $ 67,405 $ 78,422 $ 98,728 Impaired ACI Loans and Pools Including TDRs The following includes certain key information about individually impaired ACI loans and pooled ACI loans as of and for the years ended December 31, 2018 and 2017. ACI Loans / Pools Identified as Impaired As of December 31, 2018 ACI Loans / Pools Identified as Impaired (In thousands) Recorded Investment in Impaired Loans (1) Unpaid Principal Balance Related Specific Allowance Nonaccrual Loans Included in Impaired Loans Undisbursed Commitments Commercial and Industrial $ 2,100 $ 2,331 $ 58 $ — $ — Commercial Real Estate 74,017 97,613 1,641 — — Consumer 18,301 17,888 6,225 — — Total $ 94,418 $ 117,832 $ 7,924 $ — $ — As of December 31, 2017 ACI Loans / Pools Identified as Impaired (In thousands) Recorded Investment in Impaired Loans (1) Unpaid Principal Balance Related Specific Allowance Nonaccrual Loans Included in Impaired Loans Undisbursed Commitments Commercial and Industrial $ 13,541 $ 17,630 $ 5 $ — $ — Commercial Real Estate 82,856 112,330 2,010 225 — Consumer 18,603 22,064 6,509 — — Total $ 115,000 $ 152,024 $ 8,524 $ 225 $ — (1) The recorded investment of a loan also includes any interest receivable, net unearned discount or fees, and unamortized premium or discount. ACI Loans that Were Modified into TDRs There were no ACI loans modified into a TDR for the years ended December 31, 2018 and 2017. Credit Exposure in the ACI Portfolio The following provides information regarding the credit exposure by portfolio segment and class of receivable as of December 31, 2018 and 2017: ACI Loans by Risk Rating / Delinquency Stratification ACI loans based on internal risk rating: As of December 31, 2018 December 31, 2017 (Recorded Investment in thousands) Special Mention Substandard Doubtful Special Mention Substandard Doubtful Commercial and Industrial General C&I $ 426 $ 1,445 $ 39 $ 737 $ 1,173 $ 37 Healthcare — — — — 6,148 — Total commercial and industrial 426 1,445 39 737 7,321 37 Commercial Real Estate Income producing 1,207 3,080 — 2,179 6,515 — Total commercial real estate 1,207 3,080 — 2,179 6,515 — Consumer Residential real estate 89 4,442 — 3,900 22,635 — Other — 3 — 114 417 — Total consumer 89 4,445 — 4,014 23,052 Total $ 1,722 $ 8,970 $ 39 $ 6,930 $ 36,888 $ 37 ACI Consumer credit exposure, based on past due status: As of December 31, 2018 (1) December 31, 2017 (Recorded Investment in thousands) Residential Real Estate Other Residential Real Estate Other 0 – 29 Days Past Due $ 115,404 $ 845 $ 139,662 $ 1,356 30 – 59 Days Past Due 1,985 91 2,299 120 60 – 89 Days Past Due 1,435 — 2,496 62 90 – 119 Days Past Due 217 3 399 — 120 + Days Past Due 3,598 — 7,480 45 Total $ 122,639 $ 939 $ 152,336 $ 1,583 (1) During the third quarter of 2018, the Company began determining the risk rating classification for its consumer portfolio based on delinquency and nonaccrual status in accordance with the Uniform Retail Credit Classification guidance, which contributed to a lower amount of nonaccrual loans from the previous periods.

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2018
Property Plant And Equipment [Abstract]
Premises and Equipment	Note 5—Premises and Equipment Premises and equipment are stated at cost, less accumulated depreciation and amortization, as follows: December 31, (In thousands) Estimated Useful Life in Years 2018 2017 Premises: Land — $ 16,604 $ 16,875 Buildings, construction and improvements (1) 2-40 54,298 53,620 Total premises 70,902 70,495 Equipment 3-10 40,960 34,123 Total premises and equipment 111,862 104,618 Less: Accumulated depreciation and amortization (48,241 ) (41,186 ) Total premises and equipment, net $ 63,621 $ 63,432 (1) Leasehold improvements are depreciated over the lesser of the estimated useful life or the lease term. The amount charged to operating expenses for depreciation was approximately $7.6 million, $7.1 million and $6.7 million for 2018, 2017 and 2016, respectively. Included in other assets is net software cost totaling $4.0 million and $4.0 million as of December 31, 2018 and 2017, respectively. The amount charged to operating expenses for software amortization was $1.7 million, $1.9 million and $1.7 million for the years ended December 31, 2018, 2017 and 2016, respectively. The Company leases various premises and equipment under operating leases. The leases have varying terms, with most containing renewal or first-right-of-refusal options for multi-year periods and annual increases in base rates. The following is a schedule by year of future minimum lease payments under operating leases, as of December 31, 2018: (In thousands) Property Equipment Total 2019 $ 10,005 $ 299 $ 10,304 2020 9,103 158 9,261 2021 8,445 72 8,517 2022 6,220 — 6,220 2023 3,968 — 3,968 Thereafter 5,302 — 5,302 Total minimum lease payments $ 43,043 $ 529 $ 43,572 Rental expense for premises and equipment, net of rental income, for the years ended December 31, 2018, 2017 and 2016, was approximately $12.1 million, $11.2 million and $11.1 million, respectively. The major portion of equipment rental expense is related to office equipment and is paid on a month-to-month basis.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Note 6—Goodwill and Other Intangible Assets The following table summarizes the Company’s goodwill and other intangible assets at December 31, 2018 and 2017: December 31, (In thousands) 2018 2017 Goodwill $ 307,083 $ 317,817 Core deposit intangible, net of accumulated amortization of $39,385 and $38,091, respectively 301 1,595 Customer lists, net of accumulated amortization of $19,709 and $18,097, respectively 6,992 8,604 Trademarks 24 24 Total goodwill and intangible assets $ 314,400 $ 328,040 On May 31, 2018 the Company completed the sale of the assets of its insurance subsidiary, T&C to an unrelated third party, selling $11.1 million in net assets, including $10.9 million in goodwill and intangibles. The estimated amortization expense (In thousands) Amount 2019 $ 1,344 2020 910 2021 805 2022 735 2023 and thereafter 3,500

Derivatives

Derivatives	12 Months Ended
	Dec. 31, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivatives	Note 7—Derivatives The Company primarily uses derivatives to manage exposure to market risk, including interest rate risk, credit risk and foreign currency risk, and to assist customers with their risk management objectives. Management will designate certain derivatives as hedging instruments in a qualifying hedge accounting relationship. The Company’s remaining derivatives consist of economic hedges that do not qualify for hedge accounting and derivatives held for customer accommodation, or other purposes. The fair value of derivative positions outstanding is included in other assets and other liabilities in the accompanying consolidated balance sheets and in the net change in each of these financial statement line items in the accompanying consolidated statements of cash flows. For derivatives not designated as hedging instruments, gains and losses due to changes in fair value are included in noninterest income and the operating section of the consolidated statement of cash flows. For derivatives designated as hedging instruments, the entire change in the fair value related to the derivative instrument is recognized as a component of other comprehensive income and subsequently reclassified into interest income when the forecasted transaction affects income. The notional amounts and estimated fair values as of December 31, 2018 and 2017 were as follows: December 31, 2018 December 31, 2017 Fair Value Fair Value (In thousands) Notional Amount Other Assets Other Liabilities Notional Amount Other Assets Other Liabilities Derivatives designated as hedging instruments (cash flow hedges): Commercial loan interest rate swaps $ 650,000 $ — $ 23,968 $ 1,032,000 $ — $ 21,394 Derivatives not designated as hedging instruments: Commercial loan interest rate swaps 1,155,942 4,439 1,777 737,533 2,056 2,056 Commercial loan interest rate caps 88,430 239 239 186,290 153 153 Commercial loan interest rate floors 652,822 5,587 5,587 330,764 1,054 1,054 Commercial loan interest rate collars 80,000 96 96 — — — Mortgage loan held for sale interest rate lock commitments 5,286 72 — 6,119 50 — Mortgage loan forward sale commitments 1,959 5 — 4,565 10 — Mortgage loan held for sale floating commitments 14,690 — — 11,800 — — Foreign exchange contracts 46,971 698 683 41,688 635 623 Total derivatives not designated as hedging instruments 2,046,100 11,136 8,382 1,318,759 3,958 3,886 Total derivatives $ 2,696,100 $ 11,136 $ 32,350 $ 2,350,759 $ 3,958 $ 25,280 The Company is party to collateral support agreements with certain derivative counterparties. Such agreements require that the Company maintain collateral based on the fair values of derivative transactions. In the event of default by the Company, the counterparty would be entitled to the collateral. At December 31, 2018 and 2017, the Company was required to post $25.3 million and $20.1 million, respectively, in cash or securities as collateral for its derivative transactions, which are included in “interest-bearing deposits in banks” on the Company’s consolidated balance sheets. The Company’s master agreements represent written, legally enforceable bilateral agreements that (1) create a single legal obligation for all individual transactions covered by the master agreement and (2) in the event of default, provide the non-defaulting counterparty the right to accelerate, terminate, and close-out on a net basis all transactions under the agreement and to promptly liquidate or set-off collateral posted by the defaulting counterparty. As permitted by U.S. GAAP, the Company does not offset fair value amounts for the right to reclaim cash collateral or the obligation to return cash collateral against fair value amounts of derivatives executed with the same counterparty under the master agreement. Pre-tax For the Year Ended December 31, 2018 2017 2016 (In thousands) OCI Reclassified from AOCI to interest income Noninterest income OCI Reclassified from AOCI to interest income Noninterest income OCI Reclassified from AOCI to interest income Noninterest income Derivatives designated as hedging instruments (cash flow hedges): Commercial loan interest rate swaps $ (7,711 ) $ (5,164 ) $ — $ (1,426 ) $ 3,705 $ — $ (7,444 ) $ 11,255 $ 166 Derivatives not designated as hedging instruments: Mortgage loans held for sale interest rate lock commitments $ — $ — $ 22 $ — $ — $ (39 ) $ — $ — $ 24 Foreign exchange contracts — — 2,222 — — 2,271 — — 1,264 Interest Rate Swap, Floor, Cap and Collar Agreements not designated as hedging derivatives The Company enters into certain interest rate swap, floor, cap and collar agreements on commercial loans that are not designated as hedging instruments. These derivative contracts relate to transactions in which the Company enters into an interest rate swap, floor, cap or collar with a loan customer while at the same time entering into an offsetting interest rate agreement with another financial institution. In connection with each swap transaction, the Company agrees to pay interest to the customer on a notional amount at a variable interest rate and receive interest from the customer on a similar notional amount at a fixed interest rate. At the same time, the Company agrees to pay another financial institution the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount. The interest rate swap transaction allows the Company’s customer to effectively convert a variable rate loan to a fixed rate. The interest rate cap transaction allows the Company’s customer to minimize interest rate risk exposure to rising interest rates. Because the Company acts as an intermediary for its customer, changes in the fair value of the underlying derivative contracts for the most part offset each other and do not significantly impact the Company’s consolidated statements of income. The Company is exposed to credit loss in the event of nonperformance by the parties to the interest rate agreements. However, the Company does not anticipate nonperformance by the counterparties. The estimated fair value has been recorded as an asset and a corresponding liability in the accompanying consolidated balance sheets as of December 31, 2018 and 2017. Cash Flow Hedges Cash flow hedge relationships mitigate exposure to the variability of future cash flows or other forecasted transactions. The Company uses interest rate swaps to manage overall cash flow changes related to interest rate risk exposure on benchmark interest rate loans. In June 2015 and March 2016, the Company entered into the following interest rate swap agreements to manage overall cash flow changes related to interest rate risk exposure on benchmark interest rate loans. Effective Date Maturity Date Notional Amount (In Thousands) Fixed Rate Variable Rate June 30, 2015 December 31, 2019 $ 300,000 1.5120 % 1 Month LIBOR March 8, 2016 February 27, 2026 175,000 1.5995 1 Month LIBOR March 8, 2016 February 27, 2026 175,000 1.5890 1 Month LIBOR Based on our current interest rate forecast, $7.8 million of deferred net loss on derivatives in OCI at December 31, 2018 is estimated to be reclassified into net interest income during the next twelve months due to the payment of interest. Future changes to interest rates may significantly change actual amounts reclassified to income. There were no reclassifications into income during 2018, 2017 or 2016 as a result of any discontinuance of cash flow hedges because the forecasted transaction was no longer probable. The maximum length of time over which the Company is hedging a portion of its exposure to the variability in future cash flows for forecasted transactions is approximately seven years as of December 31, 2018.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2018
Banking And Thrift [Abstract]
Deposits	Note 8—Deposits Domestic time deposits $250,000 and over were $491.3 million and $382.4 million at December 31, 2018 and 2017, respectively. There were no foreign time deposits at either December 31, 2018 or 2017. At December 31, 2018, the scheduled maturities of time deposits included in interest-bearing deposits were as follows: (In thousands) December 31, 2018 2019 $ 1,726,122 2020 515,952 2021 98,400 2022 10,995 2023 and thereafter 5,266 Total $ 2,356,735

Borrowed Funds

Borrowed Funds	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Borrowed Funds	Note 9—Borrowed Funds Repurchase Agreements Securities sold under agreements to repurchase generally mature within one to seven days from the transaction date. Securities underlying the repurchase agreements remain under the control of the Company. Information concerning the Company’s securities sold under agreements to repurchase as of December 31, 2018 and 2017 is summarized as follows: December 31, (In thousands) 2018 2017 Balance at period end $ 1,106 $ 1,026 Average balance during the period 1,630 3,371 Average interest rate during the period 0.25 % 0.25 % Maximum month-end balance during the period $ 2,384 $ 6,286 Repurchase agreements are treated as collateralized financing obligations and are reflected as a liability in the consolidated balance sheets. The carrying value of investment securities collateralizing repurchase agreements was $3.3 million and $7.5 million and December 31, 2018 and 2017, respectively. Senior and Subordinated Debt In June 2014, the Company and the Bank completed an unregistered $245 million multi-tranche debt transaction and in March 2015, the Company completed an unregistered $50 million debt transaction. These transactions enhanced our liquidity and regulatory capital levels to support balance sheet growth. Details of the debt transactions are as follows: (In thousands) 2018 2017 Cadence Bancorporation: 4.875% senior notes, due June 28, 2019 $ 145,000 $ 145,000 5.375% senior notes, due June 28, 2021 50,000 50,000 7.250% subordinated notes, due June 28, 2029, callable in 2024 35,000 35,000 6.500% subordinated notes, due March 2025, callable in 2020 40,000 40,000 Total — Cadence Bancorporation 270,000 270,000 Cadence Bank: 6.250% subordinated notes, due June 28, 2029, callable in 2024 25,000 25,000 Debt issue cost and unamortized premium (1,211 ) (1,606 ) Purchased 4.875% senior notes, due June 28, 2019 (10,078 ) (10,078 ) Total $ 283,711 $ 283,316 The senior transactions were structured with 4 and 7 year maturities to provide holding company liquidity and to stagger the Company’s debt maturity profile. The $35 million and $25 million subordinated debt transactions were structured with a 15 year maturity, 10 year call options, and fixed-to-floating interest rates in order to maximize regulatory capital treatment. These subordinated debt structures were designed to achieve full Tier 2 capital treatment for 10 years. The $40 million subordinated debt transaction has a 5 year call option. The Company’s senior notes are unsecured, unsubordinated obligations and are equal in right of payment to all of the Company’s other unsecured debt. The Company’s subordinated notes are unsecured obligations and will be subordinated in right of payment to all of the Company’s senior indebtedness and general creditors and to depositors at the Bank. The Company’s senior notes and subordinated notes are not guaranteed by any subsidiary of the Company, including the Bank. The Bank’s subordinated notes are unsecured obligations and are subordinated in right of payment to all of the Bank’s senior indebtedness and general creditors and to depositors of the Bank. The Bank’s subordinated notes are not guaranteed by the Company or any subsidiary of the Bank. Payment of principal on the Company’s and Bank’s subordinated notes may be accelerated by holders of such subordinated notes only in the case of certain insolvency events. There is no right of acceleration under the subordinated notes in the case of default. The Company and/or the Bank may be required to obtain the prior written approval of the Federal Reserve, and, in the case of the Bank, the OCC, before it may repay the subordinated notes issued thereby upon acceleration or otherwise. Junior Subordinated Debentures In conjunction with the Company’s acquisition of Cadence Financial Corporation and Encore Bank, N.A., the junior subordinated debentures were marked to fair value as of their respective acquisition dates. The related mark is being amortized over the remaining term of the junior subordinated debentures. The following is a list of junior subordinated debt: December 31, (In thousands) 2018 2017 Junior subordinated debentures, 3 month LIBOR plus 2.85%, due 2033 $ 30,000 $ 30,000 Junior subordinated debentures, 3 month LIBOR plus 2.95%, due 2033 5,155 5,155 Junior subordinated debentures, 3 month LIBOR plus 1.75%, due 2037 15,464 15,464 Total par value 50,619 50,619 Purchase accounting adjustment, net of amortization (13,666 ) (14,147 ) Total junior subordinated debentures $ 36,953 $ 36,472 Advances from FHLB and Borrowings from FRB FHLB advances were $150 million at December 31, 2018 and 2017. Advances are collateralized by $1.6 billion of commercial and residential real estate loans pledged under a blanket lien arrangement as of December 31, 2018. As of December 31, 2018 and 2017, the FHLB has issued for the benefit of the Bank irrevocable letters of credit totaling $590.0 million and $386.5 million, respectively. Included in the FHLB letters of credit is a $35 million irrevocable letter of credit in favor of the State of Alabama SAFE Program to secure certain deposits of the State of Alabama. This letter of credit expires September 28, 2020 upon 45 days’ prior notice of non-renewal; otherwise it automatically extends for a successive one-year term. The Bank also has a $555 million in irrevocable letters of credit to secure a large public fund treasury management deposit. Of this amount, $205 million expired in January 2019, while $350 million will expire May 26, 2021 upon 45 days’ prior notice of non-renewal; otherwise it automatically extends for a successive one-year term. There were no borrowings from the FRB discount window as of December 31, 2018 and 2017. Any borrowings from the FRB will be collateralized by $740.3 million in commercial loans pledged under a borrower-in-custody arrangement.

Other Noninterest Income and Ot

Other Noninterest Income and Other Noninterest Expense	12 Months Ended
	Dec. 31, 2018
Other Nonoperating Income Expense [Abstract]
Other Noninterest Income and Other Noninterest Expense	Note 10—Other Noninterest Income and Other Noninterest Expense The detail of the other noninterest income and other noninterest expense captions presented in the consolidated statements of income is as follows: For the Year Ended December 31, (In thousands) 2018 2017 2016 Other noninterest income Insurance revenue $ 2,677 $ 7,378 $ 7,717 Bankcard fees 5,951 7,310 7,270 Income from bank owned life insurance policies 3,450 3,313 2,954 Other 6,033 6,655 (263 ) Total other noninterest income $ 18,111 $ 24,656 $ 17,678 For the Year Ended December 31, (In thousands) 2018 2017 2016 Other noninterest expense Net cost of operation of other real estate owned $ 653 $ 2,251 $ 3,033 Data processing expense 8,775 7,590 6,280 Consulting and professional fees 13,285 9,090 6,728 Loan related expenses 3,145 2,379 3,114 FDIC insurance 4,645 4,275 7,228 Communications 2,773 2,837 2,656 Advertising and public relations 2,523 2,048 1,369 Legal expenses 3,732 4,274 2,721 Other 27,649 25,921 27,469 Total other noninterest expense $ 67,180 $ 60,665 $ 60,598

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Note 11—Income Taxes The components of the consolidated income tax expense are as follows: For the Year Ended December 31, (In thousands) 2018 2017 2016 Current: Federal $ 36,862 $ 33,799 $ 24,394 State 3,791 2,458 2,166 Total current expense 40,653 36,257 26,560 Deferred: Federal 3,791 44,009 5,439 State 673 380 541 Total deferred expense 4,464 44,389 5,980 Total income tax expense $ 45,117 $ 80,646 $ 32,540 Income tax expense as shown in the consolidated statements of income differed from the amounts computed by applying the U.S. federal income statutory rate to income before income taxes. The statutory rate is 21% for the year ended December 31, 2018 and 35% for the years ended December 31, 2017 and 2016. A reconciliation of the differences is presented below: For the Year Ended December 31, (In thousands) 2018 2017 2016 Computed income tax expense at statutory rate $ 44,389 $ 64,050 $ 34,410 Effects of tax reform (284 ) $ 19,022 — Tax exempt interest, net (1,609 ) (3,988 ) (2,744 ) BOLI income (717 ) (1,148 ) (1,023 ) State tax expense 3,527 2,279 1,760 Goodwill writeoff on sale of subsidiary assets 2,254 — — One-time bad debt deduction on legacy loan portfolio (5,565 ) — — Other, net 3,122 431 137 Total income tax expense $ 45,117 $ 80,646 $ 32,540 As a result of Tax Reform enacted on December 22, 2017, deferred taxes are based on the newly enacted U.S. federal statutory income tax rate of 21%. In 2017, the provisional amount recorded related to the remeasurement of the Company’s deferred tax asset was $19.0 million, which was recorded as income tax expense. The Company completed its analysis of the remeasurement of the Company’s deferred tax asset within the measurement period and the amount is not materially different from the provisional amount recorded in 2017. The significant components of the Company’s deferred tax assets and liabilities as of December 31, 2018 and 2017 are as follows: As of December 31, (In thousands) 2018 2017 Deferred income tax assets: Allowance for credit losses $ 20,256 $ 18,464 Deferred compensation 3,338 3,440 Accrued compensation 3,630 2,506 Net operating loss carryforwards 8,893 9,859 Alternative minimum tax credit carryover 978 978 Unrealized loss on securities, net 7,910 1,271 Unrealized loss on derivative instruments 5,496 4,912 Other 3,588 6,198 Total deferred income tax assets 54,089 47,628 Deferred income tax liabilities: Difference in book and tax basis of intangibles 1,573 1,927 Other 6,239 4,213 Excess of book basis in assets acquired and tax liabilities assumed over book carrying value: Intangibles 9,473 7,122 Other 3,580 3,592 Total deferred income tax liabilities 20,865 16,854 Net deferred income tax asset $ 33,224 $ 30,774 A SC Topic 740, “Income Taxes,” requires that deferred tax assets be reduced if it is more likely than not that some portion or all of the deferred tax asset will not be realized. Management’s determination of the realizability of deferred tax assets is based on its evaluation of all available evidence both positive and negative, and its expectation regarding various future events, including the reversal of deferred tax liabilities, projected future taxable income and tax planning strategies. Positive evidence supporting the realization of the Company’s deferred tax assets at December 31, 2018, includes generation of taxable income since 2012, the Company’s strong capital position, as well as sufficient amounts of projected future taxable income, of the appropriate character, to support the realization of the $54.1 million at December 31, 2018. In order to fully realize the deferred tax asset, the Company will need to generate future taxable income of $191.2 million before the end of the statutory net operating loss carryforward period. Based on the assessment of all positive and negative evidence at December 31, 2018 and 2017, management has concluded that it is more likely than not that the results of future operations will generate sufficient taxable income to realize the deferred tax assets. Management’s estimate of future taxable income is based on internal projections, various internal assumptions, as well as certain external data all of which management believes to be reasonable although inherently subject to significant judgment. Projected future taxable income is primarily expected to be generated through loan growth at the bank, investment strategies and revenue from successful cross initiatives and the control of expenses through operating effectiveness, all in the context of a macro-economic environment that continues to trend favorably. If actual results differ significantly from the current estimates of future taxable income, a valuation allowance may need to be recorded for some portion or all of the net deferred tax asset. Such an increase to the deferred tax asset valuation allowance could have a material adverse effect on the Company’s consolidated balance sheets and consolidated statements of income. The acquisitions of Cadence Financial Corporation and Encore resulted in an "ownership change" as defined for U.S. federal income tax purposes under Section 382 of the Internal Revenue Code. As a result of the operation of Section 382, the Company is not able to fully utilize a portion of our U.S. federal and state tax net operating losses and certain built-in losses that have not been recognized for tax purposes. An ownership change under Section 382 generally occurs when a change in the aggregate percentage ownership of the stock of the corporation held by five percent stockholders increases by more than fifty percentage points over a rolling three-year period. A corporation experiencing an ownership change generally is subject to an annual limitation on its utilization of pre-change losses and certain post-change recognized built-in losses equal to the value of the stock of the corporation immediately before the ownership change, multiplied by the long-term tax-exempt rate (subject to certain adjustments). The annual limitation is increased each year to the extent that there is an unused limitation in a prior year. Since U.S. federal net operating losses generally may be carried forward for up to 20 years, the annual limitation also effectively provides a cap on the cumulative amount of pre-change losses and certain post-change recognized built-in losses that may be utilized. Pre-change losses and certain post-change recognized built-in losses in excess of the cap are effectively unable to be used to reduce future taxable income. The Company has estimated the amount of pre-change losses and certain post-change losses that are not expected to be utilized and has reduced the deferred tax asset at the acquisition date to reflect this limitation. The acquisition of Superior Bank was an asset acquisition and is not subject to the limitations of Section 382. As of December 31, 2018, the Company has federal net operating loss carryforwards of $37.9 million which will begin to expire in 2031. The Company has state net operating loss carryforwards of $21.2 million which will begin to expire in 2023. In addition, the Company has an AMT credit carryforward of $978,000 as of December 31, 2018, which has no expiration. The Company and its subsidiaries are subject to U.S. federal income tax as well as various state and local income taxes. With certain limited exceptions, the Company has concluded all U.S. federal and state income tax matters for years before 2015. The Company applies the guidance in ASC 740-10, “Accounting for Uncertainty in Income Taxes.” ASC 740-10 provides guidance for how uncertain tax positions should be recognized, measured, presented, and disclosed in the financial statements. ASC 740-10 requires the evaluation of tax positions taken or expected to be taken in the course of preparing the Company’s tax returns to determine whether the tax positions are “more likely than not” to be sustained by the applicable tax authority based on technical merits of the position. Tax benefits from tax positions not deemed to meet the “more likely than not” threshold should not be recognized in the year of determination. A reconciliation of the beginning and ending amount of unrecognized income tax benefits is as follows (unrecognized state income tax benefits are not adjusted for the federal income tax impact): For the Year Ended December 31, (In thousands) 2018 2017 2016 Unrecognized income tax benefits $ 894 $ 944 $ — Increases for tax positions related to: Prior years — 9 422 Current year 479 394 522 Decreases for tax positions related to: Prior years (101 ) (453 ) — Current year — — — Settlement with taxing authorities — — — Expiration of applicable statutes of limitations — — — Unrecognized income tax benefits $ 1,272 $ 894 $ 944 As of December 31, 2018 and 2017, the balance of unrecognized tax benefits, if recognized, that would reduce the effective tax rate is $1.0 million and $0.6 million, respectively. The Company does not anticipate a significant change to the total amount of unrecognized tax benefits with the next 12 months. The Company classifies interest and penalties on uncertain tax positions as a component of noninterest expense. During the years ended December 31, 2018 and 2017, the Company recognized approximately $57,000 and $(4,000) in interest and penalties. The Company’s accrued interest and penalties on unrecognized tax benefits was $137,000 and $88,000 as of December 31, 2018 and 2017, respectively. Accrued interest and penalties are included in other liabilities.

Earnings Per Common Share

Earnings Per Common Share	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Common Share	Note 12—Earnings Per Common Share The following table displays a reconciliation of the information used in calculating basic and diluted net income per common share for each of the years in the period ended December 31, 2018. Year Ended December 31, (In thousands, except per share data) 2018 2017 2016 Net income per consolidated statements of income $ 166,261 $ 102,353 $ 65,774 Net income allocated to participating securities (197 ) — — Net income allocated to common stock $ 166,064 $ 102,353 $ 65,774 Weighted average common shares outstanding (Basic) 83,562,109 81,072,945 75,000,000 Weighted average dilutive restricted stock units 813,180 532,070 294,600 Weighted average common shares outstanding (Diluted) 84,375,289 81,605,015 75,294,600 Earnings per common share (Basic) $ 1.99 $ 1.26 $ 0.88 Earnings per common share (Diluted) $ 1.97 $ 1.25 $ 0.87

Employee Benefits

Employee Benefits	12 Months Ended
	Dec. 31, 2018
Compensation And Retirement Disclosure [Abstract]
Employee Benefits	Note 13—Employee Benefits Defined Benefit Pension Plan The Company accounts for its defined benefit pension plan in accordance with ASC Topic 715. This guidance requires companies to recognize the funded status of a defined benefit plan (measured as the difference between the fair value of plan assets and the projected benefit obligation) on the balance sheets and to recognize in other comprehensive income any gains or losses and prior service costs or benefits not included as components of periodic benefit cost. In accordance with purchase accounting rules, the plan’s prior unrecognized service cost and prior unrecognized loss were eliminated as of the acquisition date; thus, there are no prior service cost or loss amortization amounts reflected in the consolidated statements of income. Participation in the defined benefit pension plan was frozen effective April 30, 2011. The following table sets forth the defined benefit pension plan’s funded status as of December 31, 2018 and 2017 and amounts recognized in the Company’s consolidated financial statements for each of the years in the period ended December 31, 2018: (In thousands) 2018 2017 Change in benefit obligation: Benefit obligation at beginning of period $ 5,909 $ 5,785 Service cost 100 100 Interest cost 165 192 Actuarial loss (gain) (797 ) 224 Administrative expenses paid (36 ) (40 ) Benefits paid (225 ) (77 ) Settlements — (275 ) Benefit obligation at end of year 5,116 5,909 Change in plan assets: Fair value of plan assets at beginning of period 6,130 4,689 Return on plan assets (213 ) 533 Employer contributions — 1,300 Administrative expenses paid (36 ) (40 ) Benefits paid (225 ) (77 ) Settlements — (275 ) Fair value of plan assets at end of year 5,656 6,130 Funded status $ 540 $ 221 (In thousands) 2018 2017 2016 Components of net periodic benefit cost: Service cost $ 100 $ 100 $ 100 Interest cost 165 192 221 Expected return on plan assets (319 ) (261 ) (234 ) Net loss amortization — 65 53 Cost of settlements — 45 156 Net periodic benefit cost $ (54 ) $ 141 $ 296 Amount recognized in accumulated other comprehensive income: Amortization of net actuarial loss $ — $ 65 $ 53 Net actuarial gain (loss) 265 48 (226 ) Adjustment for settlement — 45 156 Gains (losses) on pension liability 265 158 (17 ) Tax effect (62 ) (37 ) 4 Net unrealized gains (losses) on pension liability $ 203 $ 121 $ (13 ) 2018 2017 2016 Weighted average assumptions used to determine benefit obligations and net periodic pension cost at December 31: Discount rate 3.92 % 3.21 % 3.52 % Compensation increase rate N/A N/A N/A Census date 1/1/2019 1/1/2018 1/1/2017 Expected return on plan assets 5.50 % 5.50 % 5.50 % Of the above amount recognized in accumulated other comprehensive income, $20 thousand is expected to be recognized as a component of net periodic benefit cost in 2019. Retiree benefit payments, which reflect expected future service, are anticipated to be paid as follows: (In thousands) Amount 2019 $ 1,173 2020 1,262 2021 298 2022 249 2023 497 2024-2028 1,301 Total $ 4,780 In determining the expected return on plan assets, the Company considers the relative weighting of plan assets, the historical performance of total plan assets, individual asset classes, and economic and other indicators of future performance. In addition, the Company may consult with and consider the opinions of financial and other professionals in developing appropriate return benchmarks. The Company’s defined benefit pension plan fair values and weighted-average asset allocations at December 31, 2018 and 2017, by asset category, were as follows: 2018 2017 (In thousands) Fair Value of Plan Assets Asset Allocations Fair Value of Plan Assets Asset Allocations Asset Category: Equity securities $ 2,262 40 % $ 2,382 39 % Fixed income securities 3,311 59 3,342 55 Cash and cash equivalents 83 1 406 6 Total $ 5,656 100 % $ 6,130 100 % The primary investment objective of the Company’s defined benefit pension plan is to maximize total return while accepting and managing a moderate to average degree of risk. The assets are invested based upon a moderate growth asset allocation model, which seeks to provide long-term growth of capital with a moderate level of current income and a somewhat higher level of principal volatility. For 2018, the assets were allocated in a target mix of 59% fixed income, 40% equity, and 1% other. The fixed income class is divided between core fixed income bond funds and a high-yield bond fund. The equity class is diversified among large, mid and small cap growth and value stock funds with an emphasis being placed on large cap. There is also an exposure in the international equity market. This diversification among all of the equity sectors is an effort to reduce risk and attempt to generate higher returns. As a result of market conditions, the target percentages may not be achieved at any one point in time. The investments are managed by the Trust Division of the Company within the established guidelines. It is the intent of management to give the investment managers flexibility within the overall parameters designated in the investment model selected by the Bank’s Trust Company Investment Committee for the plan. The fair values of all plan assets as of December 31, 2018 and 2017, were measured using quoted prices in active markets for identical assets and liabilities (Level 1 inputs, as defined by ASC Topic 820, “Fair Value Measurements and Disclosures”). The Company does not have a minimum cash contribution for 2019. The Company did not contribute in 2018. The Company contributed $1.3 million and $0.9 million for the years ended December 31, 2017 and 2016, respectively. Other Plans Contributions to the 401(k) plan totaled $3.8 million and $3.5 million in 2018 and 2017, respectively. The accrued liability for the supplemental retirement plan that originated from an acquired bank, accounted for under ASC Topic 715, approximates the projected benefit obligation. The accrued liability for this plan was $1.7 million and $1.9 million at December 31, 2018 and 2017, respectively. The Company recognized a credit of $0.3 million in compensation expense for the year ended December 31, 2018 to adjust for lower projected benefit payments. The amount recognized in compensation expense for the years ended December 31, 2017 and 2016 was $706 thousand and $322 thousand, respectively. The accrued liabilities for the unqualified supplemental retirement and voluntary deferred compensation plans were $3.1 million and $3.2 million at December 31, 2018 and 2017, respectively. The Company recognized a credit of $80 thousand, in compensation expense for the year ended December 31, 2018 to adjust for lower projected benefit payments. The amounts recognized in compensation expense for the years ended December 31, 2017, and 2016 were $47 thousand and $186 thousand, respectively. Compensation expense for the voluntary deferred compensation plan is impacted by the changes in market values of plan assets and projected benefit payments. Projected benefit payments under these plans are anticipated to be paid as follows: Year Amount (In thousands) 2019 $ 376 2020 376 2021 384 2022 384 2023 385 2024-2028 1,903 Total $ 3,808 On June 1, 2018, the Company commenced the 2018 Employee Stock Purchase Plan (“ESPP”) whereby employees may purchase the Company’s Class A Common Stock (“Common Stock”) at a discount of 15% of the fair market value of a share of Class A Common Stock, defined as the closing price of Common Stock on the stock exchange for the first and last days of the purchase period (as defined). The total amount of the Company’s Common Stock on which options may be granted under the ESPP shall not exceed 500,000 shares. Shares of Common Stock subject to any unexercised portion of a terminated, canceled or expired option granted under the ESPP may again be used for options under the ESPP. No participating employee shall have any rights as a shareholder until the issuance of a stock certificate to the employee. There have been 40,598 shares issued under the ESPP in 2018 which resulted in compensation expense of $205 thousand for the year ended December 31, 2018.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Note 14—Related Party Transactions In the normal course of business, loans are made to directors and executive officers and to companies in which they have a significant ownership interest. In the opinion of management, these loans are made on substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with other parties, are consistent with sound banking practices, and are within applicable regulatory and lending limitations. As of December 31, 2018, the aggregate balances of related party deposits were approximately $571 million. This was primarily due to a deposit account of approximately $311 million by State Bank and one large deposit account by a related third party. The aggregate balances of related party deposits were insignificant as of December 31, 2017. The aggregate balances of related party loans as of December 31, 2018 and 2017 were insignificant.

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2018
Banking And Thrift [Abstract]
Regulatory Matters	Note 15—Regulatory Matters Cadence and Cadence Bank are each required to comply with regulatory capital requirements established by federal and state banking agencies. Quantitative measures established by regulation to ensure capital adequacy require institutions to maintain minimum ratios of common equity Tier 1, Tier 1, and total capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 capital to average tangible assets (the “Leverage” ratio). The actual capital amounts and ratios for the Company and the bank as of December 31, 2018 and 2017 are presented in the following tables and as shown, are above the thresholds necessary to be considered “well-capitalized”. Consolidated Company Bank (In thousands) Amount Ratio Amount Ratio December 31, 2018 Actual: Tier 1 leverage $ 1,209,407 10.1 % $ 1,327,974 11.1 % Common equity tier 1 capital 1,172,454 9.8 1,277,974 10.7 Tier 1 risk-based capital 1,209,407 10.1 1,327,974 11.1 Total risk-based capital 1,403,311 11.8 1,447,719 12.1 Minimum requirement: Tier 1 leverage 479,940 4.0 % 479,667 4.0 % Common equity tier 1 capital 536,930 4.5 536,285 4.5 Tier 1 risk-based capital 715,907 6.0 715,047 6.0 Total risk-based capital 954,542 8.0 953,396 8.0 Well capitalized requirement: Tier 1 leverage N/A N/A 599,584 5.0 % Common equity tier 1 capital N/A N/A 774,634 6.5 Tier 1 risk-based capital 715,907 6.0 953,396 8.0 Total risk-based capital 1,193,178 10.0 1,191,745 10.0 Consolidated Company Bank (In thousands) Amount Amount Amount Ratio December 31, 2017 Actual: Tier 1 leverage $ 1,096,438 10.7 % $ 1,198,234 11.7 % Common equity tier 1 1,058,888 10.6 1,149,181 11.5 Tier 1 risk-based capital 1,096,438 10.9 1,198,234 12.0 Total risk-based capital 1,283,561 12.8 1,311,376 13.1 Minimum requirement: Tier 1 leverage 410,770 4.0 % 410,743 4.0 % Common equity tier 1 450,951 4.5 450,874 4.5 Tier 1 risk-based capital 601,269 6.0 601,165 6.0 Total risk-based capital 801,691 8.0 801,553 8.0 Well capitalized requirement: Tier 1 leverage N/A N/A 513,429 5.0 % Common equity tier 1 N/A N/A 651,262 6.5 Tier 1 risk-based capital 601,269 6.0 801,553 8.0 Total risk-based capital 1,002,114 10.0 1,001,941 10.0 Under regulations controlling national banks, the payment of any dividends by a bank without prior approval of the OCC is limited to the current year’s net profits (as defined by the OCC) and retained net profits of the two preceding years. The Federal Reserve, as primary regulator for bank holding companies, has also stated that all common stock dividends should be paid out of current income. As the Company does not generate income on a stand-alone basis, it does not have the capability to pay common stock dividends without receiving dividends from the Bank. The Bank is required to maintain average reserve balances in the form of cash or deposits with the Federal Reserve Bank. The reserve balance varies depending upon the types and amounts of deposits. At December 31, 2018 and 2017, the required reserve balance with the Federal Reserve Bank was approximately $91.5 million and $70.9 million, respectively.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	12 Months Ended
	Dec. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	Note 16—Commitments and Contingent Liabilities The consolidated financial statements do not reflect various commitments and contingent liabilities which arise in the normal course of banking business and which involve elements of credit risk, interest rate risk, and liquidity risk. The commitments and contingent liabilities are commitments to extend credit, home equity lines, overdraft protection lines, and standby and commercial letters of credit. Such financial instruments are recorded when they are funded. A summary of commitments and contingent liabilities is as follows: As of December 31, (In thousands) 2018 2017 Commitments to extend credit $ 4,078,708 $ 3,270,097 Commitments to grant loans 103,570 522,967 Standby letters of credit 141,214 101,718 Performance letters of credit 21,026 17,638 Commercial letters of credit 11,262 11,790 Commitments to extend credit and letters of credit include some exposure to credit loss in the event of nonperformance of the customer. Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. In addition, the Company has entered certain contingent commitments to grant loans. The Company makes investments in limited partnerships, including certain low income housing partnerships for which tax credits are received. As of December 31, 2018 and 2017, unfunded capital commitments totaled $37.5 million and $20.3 million, respectively. The Company and the Bank are defendants in various pending and threatened legal actions arising in the normal course of business. In the opinion of management, based upon the advice of legal counsel, the ultimate disposition of all pending and threatened legal action will not have a material effect on the Company’s consolidated financial statements.

Concentrations of Credit

Concentrations of Credit	12 Months Ended
	Dec. 31, 2018
Risks And Uncertainties [Abstract]
Concentrations of Credit	Note 17—Concentrations of Credit Most of the loans, commitments and letters of credit involve customers or sponsors in the Company’s market areas. Investments in state and municipal securities also involve governmental entities within the Company’s market areas. General concentrations of credit by type of loan are set forth in Note 4 of these consolidated financial statements. The distribution of commitments to extend credit approximates the distribution of loans outstanding. Letters of credit were granted primarily to commercial borrowers.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	12 Months Ended
	Dec. 31, 2018
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	Note 18—Supplemental Cash Flow Information For the Year Ended December 31, (In thousands) 2018 2017 2016 Cash paid during the year for: Interest $ 120,823 $ 69,289 $ 55,086 Income taxes, net of refunds 40,754 33,268 23,025 Non-cash investing activities (at fair value): Acquisition of real estate in settlement of loans 3,207 7,023 13,494 Transfers of loans to loans held for sale 36,627 16,206 318,868 Acquisition of net profits interest in settlement of loans — — 19,104

Disclosure About Fair Values of

Disclosure About Fair Values of Financial Instruments	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Disclosure About Fair Values of Financial Instruments	Note 19—Disclosure About Fair Values of Financial Instruments The Company groups its assets and liabilities measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. This hierarchy requires the Company to maximize the use of observable market data, when available, and to minimize the use of unobservable inputs when determining fair value. Each fair value measurement is placed into the proper level based on the lowest level of significant input. These levels are: • Level 1 —Valuation is based upon quoted prices for identical instruments traded in active markets. • Level 2 —Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market. • Level 3 —Valuation is generated from model-based techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect management’s estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques include use of option pricing models, discounted cash flow models, and similar techniques. Transfers between fair value levels are recognized at the end of the fiscal quarter in which the associated change in inputs occurs. Assets and Liabilities Recorded at Fair Value on a Recurring Basis The table below presents the Company’s assets and liabilities measured at fair value on a recurring basis categorized by the level of inputs used in the valuation of each asset and liability at December 31, 2018 and 2017: (In thousands) Carrying Value (Level 1) (Level 2) (Level 3) December 31, 2018 Assets Investment securities available-for-sale $ 1,187,252 $ — $ 1,187,252 $ — Equity securities with readily determinable fair values not held for trading 5,840 5,840 — — Derivative assets 11,136 — 11,136 — Net profits interests 5,779 — — 5,779 Investments in limited partnerships 11,191 — — 11,191 Total recurring basis measured assets $ 1,221,198 $ 5,840 $ 1,198,388 $ 16,970 Liabilities Derivative liabilities $ 32,350 $ — $ 32,350 $ — Total recurring basis measured liabilities $ 32,350 $ — $ 32,350 $ — (In thousands) Carrying Value (Level 1) (Level 2) (Level 3) December 31, 2017 Assets Investment securities available-for-sale $ 1,257,063 $ — $ 1,257,063 $ — Equity securities with readily determinable fair values not held for trading 5,885 5,885 — — Derivative assets 3,958 — 3,958 — Net profits interests 15,833 — — 15,833 Total recurring basis measured assets $ 1,282,739 $ 5,885 $ 1,261,021 $ 15,833 Liabilities Derivative liabilities $ 25,280 $ — $ 25,280 $ — Total recurring basis measured liabilities $ 25,280 $ — $ 25,280 $ — There were no transfers between the Level 1 and Level 2 fair value categories during each of the three years in the period ended December 31, 2018. Changes in Level 3 Fair Value Measurements The table below includes a roll-forward of the consolidated balance sheet amounts for each of the years in the period ended December 31, 2018 Level 3 Assets Measured at Fair Value on a Recurring Basis For the Year Ended December 31, 2018 2017 2018 2017 (In thousands) Net Profits Interests Investments in Limited Partnerships Beginning Balance $ 15,833 $ 19,425 $ — $ — Transfers in due to adoption of ASU 2016-01 — — 5,129 — Adjustment recorded in retained earnings due to adoption of ASU 2016-01 — — 1,201 — Sales proceeds (5,308 ) — — — Net (losses) gains included in earnings (3,177 ) (2,442 ) 2,457 — Contributions paid — — 3,807 — Distributions received (1,569 ) (1,150 ) (1,403 ) — Ending Balance at December 31, 2018 $ 5,779 $ 15,833 $ 11,191 $ — Net unrealized (losses) gains included in earnings relating to assets held at the end of the period $ (2,818 ) $ (2,442 ) $ 2,457 $ — The fair value of the net profit interests in oil and gas reserves was estimated using discounted cash flow analyses applied to the expected cash flows from producing developed wells. Expected cash flows are derived from reports prepared by consulting engineers under established professional standards for the industry. These expected cash flow projections contain significant unobservable inputs regarding the net recoverable oil and gas reserves and forward-looking commodity prices discounted at a rate of 10%. Therefore, the fair value is subject to change based on these commodity markets. An increase of 5% in the discount rate will not produce a material change in the fair value of the net profits interest. The fair value of certain investments in limited partnerships was estimated using the practical expedient of net asset value. For other investments in limited partnerships that do not qualify for the practical expedient, we use a measurement alternative which measures these investments at cost, less any impairment, plus or minus any changes resulting from observable price changes in orderly transactions for identical or similar investments of the same issuer. Assets Recorded at Fair Value on a Nonrecurring Basis From time to time, the Company may be required to measure certain other financial assets at fair value on a nonrecurring basis in accordance with GAAP. These adjustments to fair value usually result from the application of lower of cost or fair value accounting or write-downs of individual assets. For assets measured at fair value on a nonrecurring basis which were still held on the balance sheets at December 31, 2018 and 2017, the following tables provide the level of valuation assumptions used to determine each adjustment and the related carrying value: (In thousands) Carrying Value (Level 1) (Level 2) (Level 3) December 31, 2018 Loans held for sale $ 59,461 — $ 59,461 $ — Impaired loans, net of specific allowance 71,741 — — 71,741 Other real estate 2,406 — — 2,406 Total assets measured on a nonrecurring basis $ 133,608 $ — $ 59,461 $ 74,147 (In thousands) Carrying Value (Level 1) (Level 2) (Level 3) December 31, 2017 Loans held for sale $ 61,359 — $ 61,359 $ — Impaired loans, net of specific allowance 65,088 — — 65,088 Other real estate 7,605 — — 7,605 Total assets measured on a nonrecurring basis $ 134,052 $ — $ 61,359 $ 72,693 The fair value of collateral-dependent impaired loans and OREO and the related fair value adjustments are generally based on unadjusted third-party appraisals. Appraisals that are not based on observable inputs or that require significant adjustments or fair value measurements that are not based on third-party appraisals are considered to be based on significant unobservable inputs. Nonrecurring fair value measurements of collateral dependent loans secured by oil and gas reserves and mineral rights are generally based on borrower provided or third-party reserve reports (which are reviewed by the Company’s engineering team) that utilize projected cash flows under current market conditions and include significant unobservable inputs. Projected cash flows are discounted according to risk characteristics of the underlying oil and gas properties. Assets are evaluated to demonstrate with reasonable certainty that crude oil, natural gas and natural gas liquids can be recovered from known oil and gas reservoirs under existing economic and operating conditions at current prices with existing conventional equipment, operating methods and costs. The significant unobservable inputs used in these valuations have been developed through our contacts with oil and gas industry participants, asset management and workout professionals and approved by senior management. Significant unobservable inputs used in Level 3 fair value measurements for financial assets measured at fair value on a nonrecurring basis are summarized below: Quantitative Information about Level 3 Fair Value Measurements (In thousands) Carrying Value Valuation Methods Unobservable Inputs Range December 31, 2018 Impaired loans, net of specific allowance $ 71,741 Appraised value, as adjusted Discount to fair value 0% - 20% Discounted cash flow Net recoverable oil and gas reserves and forward-looking commodity prices. Discount rate - 10% 0 - 10% Discounted cash flow Discount rates - 2.9% to 8.7% 0% - 20% (1) Enterprise value Exit multiples 0 - 15% (1) Estimated closing costs 10% Other real estate 2,406 Appraised value, as adjusted Discount to fair value 0% - 20% Estimated closing costs 10% (1) - Represents difference of unpaid balance to fair value. Quantitative Information about Level 3 Fair Value Measurements (In thousands) Carrying Value Valuation Methods Unobservable Inputs Range December 31, 2017 Impaired loans, net of specific allowance $ 65,088 Appraised value, as adjusted Discount to fair value 0% - 50% Discounted cash flow Net recoverable oil and gas reserves and forward-looking commodity prices. Discount rate - 9% 0% - 29% (1) Discounted cash flow Discount rates - 3.6% to 8.0% 0% - 1% (1) Estimated closing costs 10% Other real estate 7,605 Appraised value, as adjusted Discount of fair value 0%-20% Estimated closing costs 10% (1) - Represents fair value as a percent of the unpaid principal balance. Determination of Fair Values In accordance with ASC 820-10-35, fair values are based on the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The following describes the assumptions and methodologies used to estimate the fair value of financial instruments recorded at fair value in the consolidated balance sheets and for estimating the fair value of financial instruments for which fair value is disclosed under ASC 825-10-50. Investment Securities . When quoted prices are available in an active market, securities are classified as Level 1. For securities reported at fair value utilizing Level 2 inputs, the Company obtains fair value measurements from an independent pricing service. These fair value measurements consider observable market data that may include benchmark yield curves, reported trades, broker/dealer quotes, issuer spreads and credit information, among other inputs. Loans Held for Sale . Loans held for sale are recorded at the lower of aggregate cost or fair value. Fair value is generally based on quoted market prices of similar loans and is considered to be Level 2. Net Loans . Loans are valued on an individual basis, with consideration given to the loans’ underlying characteristics, including account types, remaining terms, annual interest rates or coupons, interest types, accrual basis, timing of principal and interest payments, current market rates, and remaining balances. A discounted cash flow model is used to estimate the fair value of the loans using assumption for the coupon rates, remaining maturities, prepayments speeds, projected default probabilities by risk grade, and estimates of prevailing discount rates. The discounted cash flow approach models the projected cash flows, applying various assumptions regarding interest and payment risks for the loans based on the loan types, payment types and fixed or variable classifications. For variable rate loans, forward interest rate curves are integrated into the projection of cash flows. The forward curves are index specific and obtained from a leading third-party provider. Future coupon payments are determined based upon the applicable forward curve, spread, next repricing date, and repricing frequency. Estimated fair values are disclosed through the application of the exit price notion. The assumptions used to estimate fair value are intended to approximate those that a market participant would use in an orderly transaction on the measurement date. Derivative Financial Instruments . Derivative financial instruments are measured at fair value based on modeling that utilizes observable market inputs for various interest rates published by leading third-party financial news and data providers. This is observable data that represents the rates used by market participants for instruments entered into at that date; however, they are not based on actual transactions, so they are classified as Level 2. Other Assets - Net profits interests. The fair value of the net profit interests in oil and gas reserves was estimated using discounted cash flow analyses applied to the expected cash flows from producing developed wells. Expected cash flows are derived from reports prepared by consulting engineers under established professional standards for the industry. Investments in Limited Partnerships. The fair value of certain investments in limited partnerships was estimated using the net asset value practical expedient provided by the partnership as allowed by ASC 820 for an equity security without a readily determinable fair value. Certain other limited partnerships without readily determinable fair values that do not qualify for the practical expedient are accounted for at cost minus impairment, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. The investments in affordable housing projects are carried at amortized costs which approximate fair value (Note 20). Deposits . The fair values disclosed for demand deposits are, by definition, equal to the amount payable on demand at the reporting date (that is, their carrying amounts). Fair values for CDs are estimated using a discounted cash flow calculation that applies interest rate spreads to current Treasury yields. FHLB . The fair value of the FHLB advance approximates its book value. Security Sold Under Agreements to Repurchase . The carrying amount of security repurchase agreements approximates their fair values. Senior Debt . The fair value of senior debt was estimated by obtaining broker indications that compared the Company’s senior debt to other comparable financial institutions. Subordinated Debt. The fair value of subordinated debentures was estimated by obtaining broker indications that compared the Company’s subordinated debentures to other comparable financial institutions. Junior Subordinated Debentures. The fair value of junior subordinated debentures was estimated by obtaining broker indications that compared the Company’s junior subordinated debentures to other comparable financial institutions. Limitations . The following fair value estimates are determined as of a specific point in time utilizing various assumptions and estimates. The use of assumptions and various valuation techniques, as well as the absence of secondary markets for certain financial instruments, will likely reduce the comparability of fair value disclosures between financial institutions. The fair values for loans involve the use of significant internally-developed pricing assumptions due to market-illiquidity for loans net of unearned income and loans held for sale as of December 31, 2018 and 2017. These assumptions are considered to reflect inputs that market participants would use in transactions involving these instruments as of the measurement date. This table only includes financial instruments of the Company, and, accordingly, the total of the fair value amounts does not represent, and should not be construed to represent, the underlying value of the Company. The estimated fair values of the Company’s financial instruments are as follows: December 31, 2018 (In thousands) Carrying Amount Fair Value Level 1 Level 2 Level 3 Financial Assets: Cash and due from banks $ 237,342 $ 237,342 $ 237,342 $ — $ — Interest-bearing deposits in other banks 523,436 523,436 523,436 — — Federal funds sold 18,502 18,502 18,502 — — Investment securities available-for-sale 1,187,252 1,187,252 — 1,187,252 — Equity securities with readily determinable fair values not held for trading 5,840 5,840 5,840 — — Loans held for sale 59,461 59,461 — 59,461 — Net loans 9,959,545 9,735,130 — — 9,735,130 Derivative assets 11,136 11,136 — 11,136 — Net profits interests 5,779 5,779 — — 5,779 Investments in limited partnerships 36,917 36,917 — — 36,917 Financial Liabilities: Deposits 10,708,689 10,700,350 — 10,700,350 — Advances from FHLB 150,000 150,000 — 150,000 — Securities sold under agreements to repurchase 1,106 1,106 — 1,106 — Senior debt 184,801 194,762 — 194,762 — Subordinated debt 98,910 103,008 — 103,008 — Junior subordinated debentures 36,953 46,946 — 46,946 — Derivative liabilities 32,350 32,350 — 32,350 — December 31, 2017 (In thousands) Carrying Amount Fair Value Level 1 Level 2 Level 3 Financial Assets: Cash and due from banks $ 238,707 $ 238,707 $ 238,707 $ — $ — Interest-bearing deposits in other banks 482,568 482,568 482,568 — — Federal funds sold 9,536 9,536 9,536 — — Securities available-for-sale 1,257,063 1,257,063 — 1,257,063 — Securities held-to-maturity 290 311 — 311 — Equity securities with readily determinable fair values not held for trading 5,885 5,885 5,885 — — Loans held for sale 61,359 61,359 — 61,359 — Net loans 8,165,851 8,134,903 — — 8,134,903 Derivative assets 3,958 3,958 — 3,958 — Net profits interests 15,833 15,833 — — 15,833 Financial Liabilities: Deposits 9,011,515 9,006,890 — 9,006,890 — Advances from FHLB 150,000 150,000 — 150,000 — Securities sold under agreements to repurchase 1,026 1,026 — 1,026 — Senior debt 184,629 194,484 — 194,484 — Subordinated debt 98,687 94,724 — 94,724 — Junior subordinated debentures 36,472 49,161 — 49,161 — Derivative liabilities 25,280 25,280 — 25,280 —

Variable Interest Entities and

Variable Interest Entities and Other Investments	12 Months Ended
	Dec. 31, 2018
Variable Interest Entities And Other Investments [Abstract]
Variable Interest Entities and Other Investments	Note 20—Variable Interest Entities and Other Investments Under ASC 810-10-65, the Company is deemed to be the primary beneficiary and required to consolidate a variable interest entity (“VIE”) if it has a variable interest in the VIE that provides it with a controlling financial interest. For such purposes, the determination of whether a controlling financial interest exists is based on whether a single party has both the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance and the obligation to absorb the losses of the VIE or the right to receive benefits from the VIE that could potentially be significant to the VIE. ASC 810-10-65, as amended, requires continual reconsideration of conclusions reached regarding which interest holder is a VIE’s primary beneficiary. The Bank has invested in several affordable housing projects as a limited partner. The partnerships have qualified to receive annual affordable housing federal tax credits that are recognized as a reduction of current tax expense. The Company has determined that these structures meet the definition of VIE’s under ASC 810 but that consolidation is not required, as the Bank is not the primary beneficiary. At December 31, 2018 and 2017, the Bank’s maximum exposure to loss associated with these limited partnerships was limited to the Bank’s investment. The Company accounts for these investments and the related tax credits using either the effective yield method or the proportional amortization method, depending upon the date of the investment. Under the effective yield method, the Bank recognizes the tax credits as they are allocated and amortizes the initial costs of the investments to provide a constant effective yield over the period that the tax credits are allocated. Under the proportional amortization method, the Bank amortizes the cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense. At December 31, 2018 and 2017, the Company had recorded investments in other assets on its consolidated balance sheets of approximately $7.8 million and $7.9 million, respectively related to these investments. Additionally, the Company invests in other certain limited partnerships accounted for under the fair value practical expedient of net asset value totaling $11.2 million as of December 31, 2018. The Company recognized a $2.5 million gain for the year ended December 31, 2018 related to these assets recorded at fair value through net income. Certain other limited partnerships without readily determinable fair values that do not qualify for the practical expedient are accounted for at their cost minus impairment, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. These investments totaled $8.7 million as of December 31, 2018. Other limited partnerships are accounted for under the equity method totaling $9.2 million and $8.8 million as of December 31, 2018 and 2017, respectively. The following table presents a summary of the Company’s investments in limited partnerships subsequent to the adoption of ASU 2016-01 as of December 31, 2018: (In thousands) As of December 31, 2018 Affordable housing projects (amortized cost) $ 7,803 Limited partnerships accounted for under the fair value practical expedient of NAV 11,191 Limited partnerships without readily determinable fair values that do not qualify for the practical expedient of NAV accounted for under the cost method 8,714 Limited partnerships required to be accounted for under the equity method 9,209 Total investments in limited partnerships $ 36,917 Marketable equity securities carried at fair value, which consists of one CRA qualifying investment and is reported in other assets in the consolidated balance sheets. Total marketable equity securities were $5.8 million and $5.9 million at December 31, 2018 and 2017, respectively. Effective January 1, 2018, Cadence adopted the new accounting guidance that requires equity investments with readily determinable fair values not held for trading to be recorded at fair value with changes in fair value reported in net income. Cadence elected a measurement alternative to fair value for certain equity investments without a readily determinable fair value. There were no downward and upward adjustments for impairments or price changes. The carrying amount of equity investments measured under the measurement alternative from observable transactions are as follows: (In thousands) Year Ended December 31, 2018 Carrying value, December 31, 2017 $ 8,856 Distributions (1,109 ) Contributions 967 Carrying value, December 31, 2018 $ 8,714 During 2016, the Bank received net profits interests in oil and gas reserves, in connection with the reorganization under bankruptcy of two loan customers (one of these was sold during 2018). The Company has determined that these contracts meet the definition of VIE’s under Topic ASC 810, but that consolidation is not required as the Bank is not the primary beneficiary. The Company sold a previously owned net profit interest in the fourth quarter of 2018 for $5.3 million. The net profits interests are financial instruments and recorded at estimated fair value, which was $5.8 million and $15.8 million at December 31, 2018 and 2017, respectively, representing the maximum exposure to loss as of that date. The Company has established a rabbi trust related to the deferred compensation plan offered to certain of its employees. The Company contributes employee cash compensation deferrals to the trust. The assets of the trust are available to creditors of the Company only in the event the Company becomes insolvent. This trust is considered a VIE because either there is no equity at risk in the trust or because the Company provided the equity interest to its employees in exchange for services rendered. The Company is considered the primary beneficiary of the rabbi trust as it has the ability to select the underlying investments made by the trust, the activities that most significantly impact the economic performance of the rabbi trust. The Company includes the assets of the rabbi trust as a component of other assets and a corresponding liability for the associated benefit obligation in other liabilities in its consolidated balance sheets. The amount of rabbi trust assets and benefit obligation was $3.6 million at December 31, 2018 and 2017, respectively.

Segment Reporting

Segment Reporting	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Segment Reporting	Note 21—Segment Reporting The Company determines reportable segments based on the services offered, the significance of the services offered, the significance of those services to the Company’s financial condition and operating results and management’s regular review of the operating results of those services. The Company operates through three operating segments: Banking, Financial Services and Corporate. The Banking Segment includes the Commercial Banking, Retail Banking and Private Banking lines of business. The Commercial Banking line of business includes a general business services component primarily focusing on commercial & industrial (C&I), community banking, business banking and commercial real estate lending to clients in the geographic footprint in Texas and the southeast United States. In addition, the Commercial Banking line of business includes within C&I a separate component that focuses on select industries (which is referred to as the “specialized industries”) in which the Company believes it has specialized experience and service capabilities, including energy, healthcare, restaurant industry, and technology. The Company serves clients in these specialized industries both within the geographic footprint and throughout the United States as a result of the national orientation of many of these businesses. The Retail Banking line of business offers a broad range of retail banking services including mortgage services through the branch network to serve the needs of consumer and small businesses in the geographic footprint. The Private Banking line of business offers banking services and loan products tailored to the needs of the high-net worth clients in the geographic footprint. The Financial Services Segment includes the Trust, Retail Brokerage, Investment Services and Insurance businesses. These businesses offer products independently to their own customers as well as to Banking Segment clients. Investment Services operates through the “Linscomb & Williams” name and prior to sale of the insurance business, Insurance operated though the “Cadence Insurance” name. (See “Sale of Subsidiary” in Note 1). The products offered by the businesses in the Financial Services Segment primarily generate non-banking service fee income. The Corporate Segment reflects parent-only activities and intercompany eliminations. Business segment results are determined based upon the management reporting system, which assigns balance sheet and income statement items to each of the business segments. The process is designed around the organizational and management structure and, accordingly, the results derived are not necessarily comparable with similar information published by other financial institutions or in accordance with generally accepted accounting principles. The Company evaluates performance and allocates resources based on profit or loss from operations. There are no material inter-segment sales or transfers. The accounting policies used by each reportable segment are the same as those discussed in Note 1. All costs, except corporate administration and income taxes, have been allocated to the reportable segments. Therefore, combined amounts agree to the consolidated totals. The following tables present the operating results of the segments as of and for the years ended December 31, 2018, 2017 and 2016: For the Year Ended December 31, 2018 (In thousands) Banking Financial Services Corporate Consolidated Net interest income (expense) $ 407,674 $ (2,307 ) $ (17,626 ) $ 387,741 Provision for credit losses 12,700 — — 12,700 Noninterest income 47,316 46,805 517 94,638 Noninterest expense 215,574 35,679 7,048 258,301 Income tax expense (benefit) 52,464 3,979 (11,326 ) 45,117 Net income (loss) $ 174,252 $ 4,840 $ (12,831 ) $ 166,261 Total assets $ 12,622,287 $ 94,618 $ 13,380 $ 12,730,285 For the Year Ended December 31, 2017 (In thousands) Banking Financial Services Corporate Consolidated Net interest income (expense) $ 344,987 $ (1,347 ) $ (17,424 ) $ 326,216 Provision for credit losses 9,735 — — 9,735 Noninterest income 51,286 47,956 632 99,874 Noninterest expense 194,212 36,178 2,966 233,356 Income tax expense (benefit) 88,417 2,000 (9,771 ) 80,646 Net income (loss) $ 103,909 $ 8,431 $ (9,987 ) $ 102,353 Total assets $ 10,854,206 $ 90,639 $ 4,081 $ 10,948,926 For the Year Ended December 31, 2016 (In thousands) Banking Financial Services Corporate Consolidated Net interest income (expense) $ 297,701 $ (201 ) $ (18,061 ) $ 279,439 Provision for credit losses 49,348 — — 49,348 Noninterest income 45,499 42,727 177 88,403 Noninterest expense 186,874 32,334 972 220,180 Income tax expense (benefit) 37,442 3,567 (8,469 ) 32,540 Net income (loss) $ 69,536 $ 6,625 $ (10,387 ) $ 65,774

Equity-based Compensation

Equity-based Compensation	12 Months Ended
	Dec. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Equity-based Compensation	Note 22—Equity-based Compensation The Company administers a long-term incentive compensation plan that permits the granting of incentive awards in the form of stock options, restricted stock, restricted stock units, performance units, stock appreciation rights, or other stock-based awards. The terms of all awards issued under these plans are determined by the Compensation Committee of the Board of Directors The Amended and Restated 2015 Omnibus Incentive Plan (the “Plan”), permits the Company to grant to employees and directors various forms of incentive compensation. The principal purposes of this plan are to focus directors, officers and other employees and consultants on business performance that creates shareholder value, to encourage innovative approaches to the business of the Company, and to encourage ownership of the Company’s stock. The Plan authorizes 7,500,000 common share equivalents available for grant, where grants of full value awards (e.g., shares of restricted stock, restricted stock units and performance stock units) count as one share equivalent. The number of remaining share equivalents available for future issuance under the Plan was 7,224,256 at December 31, 2018. On July 21, 2015, the Company granted 258,375 restricted stock units to select executives. These grants contained performance conditions which, for accounting purposes, were deemed improbable of being achieved during the fourth quarter of 2016. On November 30, 2016, these grants were cancelled and replaced with 395,250 restricted stock units with a market condition. Also granted at the time of the modification were 277,500 restricted stock units to new grantees. The grantees did not have rights as stockholders, including the right to dividends, until the restricted stock units are vested. These units expired in the fourth quarter of 2018 as the market condition was not achieved. On April 2, 2018, the Company granted 270,105 shares of stock-based awards in the form of restricted stock units pursuant to and subject to the provisions of the Plan. While the grant specifies a stated target number of units, the determination of the actual settlement in shares will be based in part on the achievement of certain financial performance measures of the Company over the three years ending December 31, 2020. For half of the units granted, these performance conditions will determine the actual units vested on March 31, 2021 and can be in the range of zero to two times the units granted. The remaining half of the restricted stock units vest equally on March 31 of each of the next three years. These grants include rights as a shareholder in the form of dividend equivalents. Dividend equivalents for time vested restricted stock units will be paid on each dividend payment date for the Company; dividend equivalents for the performance vesting restricted stock will be accrued and paid on the vested number of shares once the performance is achieved and the shares are issued. On October 1, 2018, the Company granted an additional 6,346 shares of stock-based awards in the form of restricted stock units pursuant to and subject to the provisions of the Plan with the same terms as the awards granted on April 2, 2018. The fair value of these restricted stock units was estimated based upon the fair value of the underlying shares on the date of the grant. The Company recorded $3.7 million equity-based compensation expense for the outstanding restricted stock units for 2018, compared to $1.7 million and $117 thousand for 2017 and 2016, respectively. The remaining expense related to unvested restricted stock units is $5.3 million as of December 31, 2018 and will be recognized over the next 27 months. There were 275,744 outstanding non-vested restricted stock units with a weighted average grant date fair value of $26.49 as of December 31, 2018. The following table summarizes the activity related to restricted stock unit awards for the years ended December 31, 2018, 2017 and 2016: For the Year Ended December 31, 2018 2018 2017 2016 Number of Shares Fair Value per Unit at Award Date Number of Shares Fair Value per Unit at Award Date Number of Shares Fair Value per Unit at Award Date Non-vested at beginning of period 672,750 $ 5.14 672,750 $ 5.14 258,375 $ 13.43 Units deemed improbable to vest — — — — (258,375 ) 13.43 Expired during the period (672,750 ) 5.14 — — — — Amended grants — — — — 395,250 5.14 Forfeited during the period (707 ) 26.50 — — — — Granted during the period 276,451 26.49 — — 277,500 5.14 Non-vested at end of period 275,744 $ 26.49 672,750 $ 5.14 672,750 $ 5.14

Condensed Financial Information

Condensed Financial Information of Cadence Bancorporation (Parent Only)	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information Of Parent Company Only Disclosure Abstract
Condensed Financial Information of Cadence Bancorporation (Parent Only)	Note 23—Condensed Financial Information of Cadence Bancorporation (Parent Only) Condensed Balance Sheets December 31, 2018 and 2017 (In thousands) 2018 2017 ASSETS Cash and due from banks $ 985 $ 494 Interest-bearing deposits with banks 114,871 150,587 Investment in consolidated bank subsidiary 1,593,469 1,488,223 Investment in consolidated nonbank subsidiary 16,787 16,008 Other assets 15,126 3,587 Total Assets $ 1,741,238 $ 1,658,899 LIABILITIES AND SHAREHOLDER’S EQUITY Liabilities: Interest payable $ 818 $ 813 Senior debt 184,801 184,629 Subordinated debt 74,158 73,982 Junior subordinated debentures 36,953 36,472 Other liabilities 6,234 3,947 Total liabilities 302,964 299,843 Shareholder’s Equity: Common stock 836 836 Additional paid-in capital 1,041,000 1,037,040 Treasury stock (22,010 ) — Retained earnings 461,360 340,213 Accumulated other comprehensive loss (42,912 ) (19,033 ) Total Shareholders' Equity 1,438,274 1,359,056 Total Liabilities and Shareholders' Equity $ 1,741,238 $ 1,658,899 Condensed Statements of Income For the Years Ended December 31, 2018, 2017 and 2016 (In thousands) 2018 2017 2016 INCOME Dividends from bank subsidiary $ 59,494 $ 11,000 $ 13,500 Interest income 73 65 25 Other income 516 632 176 Total income 60,083 11,697 13,701 EXPENSES Interest expense 17,626 17,424 18,060 Other expenses 7,048 3,305 2,092 Total expenses 24,674 20,729 20,152 Income (loss) before income taxes and equity in undistributed income of subsidiaries 35,409 (9,032 ) (6,451 ) Equity in undistributed income of subsidiaries 125,727 103,390 64,424 Net income before income taxes 161,136 94,358 57,973 Income tax benefit (5,125 ) (7,995 ) (7,801 ) Net income $ 166,261 $ 102,353 $ 65,774 Condensed Statements of Cash Flows For the Years Ended December 31, 2018, 2017 and 2016 (In thousands) 2018 2017 2016 CASH FLOWS FROM OPERATING ACTIVITIES Net income $ 166,261 $ 102,353 $ 65,774 Adjustments to reconcile net income to net cash provided in operations: Deferred income tax expense 358 1,084 (1,598 ) Equity in undistributed income of subsidiaries (125,727 ) (103,390 ) (64,424 ) (Increase) decrease in other assets (10,143 ) 3,892 3,043 Increase (decrease) in interest payable 5 3 (102 ) Increase (decrease) in other liabilities 2,151 891 (504 ) Net cash provided by operating activities 32,905 4,833 2,189 CASH FLOWS FROM INVESTING ACTIVITIES Capital contributions to bank subsidiary — (50,000 ) — (Increase) decrease in limited partnership investments (125 ) (63 ) 463 Net cash (used in) provided by investing activities (125 ) (50,063 ) 463 CASH FLOWS FROM FINANCING ACTIVITIES Purchase of senior debt — (9,600 ) (78 ) Proceeds from issuance of common stock — 155,581 — Cash dividends paid on common stock (45,995 ) — — Repurchase of common stock (22,010 ) — — Net cash (used in) provided by financing activities (68,005 ) 145,981 (78 ) Net (decrease) increase in cash and cash equivalents (35,225 ) 100,751 2,574 Cash and cash equivalents at beginning of year 151,081 50,330 47,756 Cash and cash equivalents at end of year $ 115,856 $ 151,081 $ 50,330

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Note 24—Accumulated Other Comprehensive Income (Loss) Activity within the balances in accumulated other comprehensive income (loss) is shown in the following tables for each of the years in the period ended December 31, 2018. (In thousands) Unrealized gains (losses) on securities available for sale Unrealized gains (losses) on defined benefit pension plans Unrealized gains (losses) on derivative instruments designated as cash flow hedges Accumulated other comprehensive gain (loss) Balance, December 31, 2015 $ 5,901 $ (487 ) $ 1,626 $ 7,040 Net change (27,720 ) (13 ) (11,838 ) (39,571 ) Balance, December 31, 2016 (21,819 ) (500 ) (10,212 ) (32,531 ) Period change 21,605 121 (2,982 ) 18,744 Reclassification of amounts within AOCI to retained earnings due to tax reform (See Notes 1 and 11) (1,946 ) (152 ) (3,148 ) (5,246 ) Balance, December 31, 2017 (2,160 ) (531 ) (16,342 ) (19,033 ) Net change (22,119 ) 203 (1,963 ) (23,879 ) Balance, December 31, 2018 $ (24,279 ) $ (328 ) $ (18,305 ) $ (42,912 )

Quarterly Results of Operations

Quarterly Results of Operations (Unaudited)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results of Operations (Unaudited)	Note 25—Quarterly Results of Operations (Unaudited) The following is a summary of the quarterly results of operations, for the years ended December 31, 2018 and 2017: Three Months Ended, (In thousands) December 31, 2018 September 30, 2018 June 30, 2018 March 31, 2018 Interest income $ 143,857 $ 131,753 $ 123,963 $ 113,093 Interest expense 40,711 33,653 28,579 21,982 Net interest income 103,146 98,100 95,384 91,111 Provision for credit losses 8,422 (1,365 ) 1,263 4,380 Noninterest income (1) 21,007 23,976 24,672 24,983 Noninterest expense 72,696 61,231 62,435 61,939 Income before income taxes 43,035 62,210 56,358 49,775 Provision for income taxes 10,709 15,074 8,384 10,950 Net income $ 32,326 $ 47,136 $ 47,974 $ 38,825 Earnings per common share (Basic) $ 0.39 $ 0.56 $ 0.57 $ 0.46 Earnings per common share (Diluted) 0.39 0.56 0.57 0.46 Three Months Ended, (In thousands) December 31, 2017 September 30, 2017 June 30, 2017 March 31, 2017 Interest income $ 108,370 $ 99,503 $ 99,375 $ 89,619 Interest expense 20,459 18,340 16,991 14,861 Net interest income 87,911 81,163 82,384 74,758 Provision for credit losses (4,475 ) 1,723 6,701 5,786 Noninterest income (2) 25,656 27,124 22,989 24,105 Noninterest expense 66,371 56,530 56,134 54,321 Income before income taxes 51,671 50,034 42,538 38,756 Provision for income taxes 36,980 17,457 13,570 12,639 Net income $ 14,691 $ 32,577 $ 28,968 $ 26,117 Earnings per common share (Basic) $ 0.18 $ 0.39 $ 0.35 $ 0.35 Earnings per common share (Diluted) 0.17 0.39 0.35 0.35 (1 ) (2) Includes net securities gains (losses) of $16 thousand, $1 thousand, $(244) thousand and $81 thousand during the fourth, third, second and first quarters of 2017, respectively.

Summary of Accounting Policies

Summary of Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation and Consolidation	Basis of Presentation and Consolidation The Company and its subsidiaries follow accounting principles generally accepted in the United States of America, including, where applicable, general practices within the banking industry. The consolidated financial statements include the accounts of the Company and its subsidiaries. Significant intercompany accounts and transactions have been eliminated in consolidation. The assessment of whether or not the Company has a controlling interest (i.e., the primary beneficiary) in a variable-interest entity (“VIE”) is performed on an on-going basis. All equity investments in non-consolidated VIEs are included in “other assets” in the Company’s consolidated balance sheets (Note 20). Certain amounts reported in prior years have been reclassified to conform to the 2018 presentation. These reclassifications did not materially impact the Company’s consolidated balance sheets or consolidated statements of income. In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 855, “Subsequent Events,” the Company’s Management has evaluated subsequent events for potential recognition or disclosure in the consolidated financial statements through the date of the issuance of these consolidated financial statements. No subsequent events were identified that would have required a change to the consolidated financial statements or disclosure in the notes to the consolidated financial statements, other than as disclosed in Note 2, Subsequent Events.
Nature of Operations	Nature of Operations The Company’s subsidiaries include: • Town & Country Insurance Agency, Inc., dba Cadence Insurance—full service insurance agency (see “Sale of Subsidiary”); and • The Bank. The Bank operates under a national bank charter and is subject to regulation by the Office of the Comptroller of the Currency (“OCC”). The Bank provides lending services in Georgia and full banking services in five southern states: Alabama, Florida, Mississippi, Tennessee, and Texas. See Note 2, Subsequent Events, regarding the completion of its previously announced merger with State Bank Financial Corporation. The Bank’s subsidiaries include: • Linscomb & Williams Inc. —financial advisory firm, and • Cadence Investment Services, Inc.—provides investment and insurance products. The Company and the Bank also have certain other non-operating and immaterial subsidiaries.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are susceptible to significant change in the near term are the allowance for credit losses, valuation of and accounting for acquired credit impaired loans, valuation of goodwill, intangible assets and deferred income taxes.
Sale of Subsidiary	Sale of Subsidiary On May 31, 2018 the Company completed the sale of the assets of its subsidiary, Town & Country Insurance Agency, Inc. (“T&C) to an unrelated third party, selling $11.1 million in net assets, including $10.9 million in goodwill and intangibles. This transaction resulted in a pre-tax gain of $4.9 million recorded in noninterest income, offset by $1.1 million in sale related expenses recorded in noninterest expenses during the second quarter of 2018.
Securities	Securities Securities are accounted for as follows: Securities Available-for-Sale Securities classified as available-for-sale are those securities that are intended to be held for an indefinite period of time, but not necessarily to maturity. Any decision to sell a security classified as available-for-sale would be based on various factors, including movements in interest rates, liquidity needs, security risk assessments, changes in the mix of assets and liabilities and other similar factors. These securities are carried at their estimated fair value, and the net unrealized gain or loss is reported as accumulated other comprehensive income, net of tax, until realized. Premiums and discounts are recognized in interest income using the effective interest method. Realized gains and losses on the sale of securities available-for-sale are determined by specific identification using the adjusted cost on a trade date basis and are included in securities gains (losses), net. Securities Held-to-Maturity Securities classified as held-to-maturity are those securities for which there is a positive intent and ability to hold to maturity. These securities are carried at cost, adjusted for amortization of premium and accretion of discount, computed by the effective interest method. The Company had no securities held-to-maturity at December 31, 2018. Equity Securities with readily determinable fair values not held for trading Securities with readily determinable fair values not held for trading consist of marketable equity securities which are carried at fair value with changes in fair value reported in net income. Trading Account Securities Trading account securities are securities that are held for the purpose of selling them at a profit. The Company had no trading account securities as of December 31, 2018 or 2017. FHLB and FRB Stock The Company has ownership in Federal Home Loan Bank of Atlanta (“FHLB”) and Federal Reserve Bank (“FRB”) stock which do not have readily determinable fair values and no quoted market values, as ownership is restricted to member institutions, and all transactions take place at par value with the FHLB or FRB as the only purchaser. Therefore, the Company accounts for these investments as long-term assets and carries them at cost. Management’s determination as to whether these investments are impaired is based on management’s assessment of the ultimate recoverability of the par value (cost) rather than recognizing temporary declines in fair value. In order to become a member of the Federal Reserve System, regulations require that the Company hold a certain amount of FRB capital stock. Additionally, investment in FHLB stock is required for membership in the FHLB system and in relation to the level of FHLB outstanding borrowings.
Derivative Financial Instruments and Hedging Activities	Derivative Financial Instruments and Hedging Activities Derivative instruments are accounted for under the requirements of ASC Topic 815, “Derivatives and Hedging.” ASC Topic 815 requires companies to recognize all of their derivative instruments as either assets or liabilities in the consolidated balance sheets at fair value. The fair value of derivative positions outstanding is included in other assets and other liabilities in the accompanying consolidated balance sheets and in the net change in each of these financial statement line items in the accompanying consolidated statements of cash flows. The Company does not speculate using derivative instruments. Interest Rate Lock Commitments In the ordinary course of business, the Company enters into certain commitments with customers in connection with residential mortgage loan applications. Such commitments are considered derivatives under current accounting guidance and are required to be recorded at fair value. The change in fair value of these instruments is reflected currently in the mortgage banking revenue of the consolidated statements of income. The fair value of these derivatives is recorded on the consolidated balance sheets in other assets and other liabilities. Forward Sales Commitments The Company enters into forward sales commitments of mortgage-backed securities (“MBS”) with investors to mitigate the effect of the interest rate risk inherent in providing interest rate lock commitments to customers. During the period from commitment date to closing date, the Company is subject to the risk that market rates of interest may change. In an effort to mitigate such risk, forward delivery sales commitments, under which the Company agrees to deliver certain MBS, are established. These commitments are non-hedging derivatives in accordance with current accounting guidance and recorded at fair value, with changes in fair value reflected currently in the mortgage banking revenue of the consolidated statements of income. The fair value of these derivatives is recorded on the consolidated balance sheets in other assets and other liabilities. Interest Rate Swap, Floor, Cap, and Collar Agreements Not Designated as Hedging Derivatives The Company enters into interest rate swap, floor, cap and collar agreements on commercial loans with customers to meet the financing needs and interest rate risk management needs of its customers. At the same time, the Company enters into offsetting interest rate swap agreements with a financial institution in order to minimize the Company’s interest rate risk. These interest rate agreements are non-hedging derivatives and are recorded at fair value with changes in fair value reflected in noninterest income. The fair value of these derivatives is recorded on the consolidated balance sheets in other assets and other liabilities. Interest Rate Swap, Floor, Cap, and Collar Agreements Designated as Cash Flow Hedges Cash flow hedge relationships mitigate exposure to the variability of future cash flows or other forecasted transactions. The Company uses interest rate swaps, caps, collars, and floors to manage overall cash flow changes related to interest rate risk exposure on benchmark interest rate loans. The entire change in the fair value related to the derivative instrument is recognized as a component of other comprehensive income and subsequently reclassified into interest income when the forecasted transaction affects income. The Company assesses the effectiveness of hedging derivatives during the initial period with a quantitative test such as statistical regression on a prospective and retrospective basis. For subsequent periods, the effectiveness of hedging derivatives is assessed qualitatively by assuring the notional amounts of the respective derivative instruments are equal to or less than the current balance of the hedged items. Foreign Currency Contracts The Company enters into certain foreign currency exchange contracts on behalf of its clients to facilitate their risk management strategies, while at the same time entering into offsetting foreign currency exchange contracts in order to minimize the Company’s foreign currency exchange risk. The contracts are short term in nature, and any gain or loss incurred at settlement is recorded as other noninterest income or other noninterest expense. The fair value of these contracts is reported in other assets and other liabilities. The Company does not apply hedge accounting to these contracts. Counterparty Credit Risk Derivative contracts involve the risk of dealing with both bank customers and institutional derivative counterparties and their ability to meet contractual terms. Under Company policy, institutional counterparties must be approved by the Company’s Asset/Liability Management Committee. The Company’s credit exposure on derivatives is limited to the net fair value for each counterparty. Refer to Note 7 for further discussion and details of derivative financial instruments and hedging activities.
Transfers of Financial Assets	Transfers of Financial Assets Transfers of financials assets are accounted for as sales when control over the transferred assets is surrendered. Control is generally considered to have been surrendered when 1) the transferred assets are legally isolated from the Company or its consolidated affiliates, even in bankruptcy or other receivership, 2) the transferee has the right to pledge or exchange the assets with no conditions that constrain the transferee and provide more than a trivial benefit to the Company, and 3) the Company does not maintain the obligation or unilateral ability to reclaim or repurchase the assets. If these sale criteria are met, the transferred assets are removed from the Company’s balance sheet and a gain or loss on sale is recognized. If not met, the transfer is recorded as a secured borrowing, and the assets remain on the Company’s balance sheet, the proceeds from the transaction are recognized as a liability, and gain or loss on sale is deferred until the sale criterion are achieved. All transfers of financial assets in the reported periods have qualified and been recorded as sales.
Loans Held for Sale	Loans Held for Sale Mortgage Loans Held for Sale Mortgage loans originated and intended for sale in the secondary market are carried at the lower of cost or estimated fair value in the aggregate. The Company also transfers certain mortgage loans to held for sale when management has the intent to sell the loan or a portion of the loan in the near term. These held for sale loans are recorded at the lower of cost or estimated fair value. At the time of transfer, write-downs on the loans are recorded as charge-offs and a new cost basis is established. Generally, loans in this category are sold within thirty days. These loans are primarily sold with the mortgage servicing rights released. Fees on mortgage loans sold individually in the secondary market, including origination fees, service release premiums, processing and administrative fees, and application fees, are recognized as mortgage banking revenue in the period in which the loans are sold. These loans are underwritten to the standards of upstream correspondents and are held on the Company’s consolidated balance sheets until the loans are sold. Buyers generally have recourse to return a purchased loan to the Company under limited circumstances. Recourse conditions may include early payment default, breach of representations or warranties, and documentation deficiencies. During 2018, 2017 and 2016, an insignificant number of loans were returned to the Company. Commercial Loans Held for Sale The Company originates certain commercial loans for which a portion is intended for sale. The Company also transfers certain commercial loans to held for sale when management has the intent to sell the loan or a portion of the loan in the near term. These held for sale loans are recorded at the lower of cost or estimated fair value. At the time of transfer, write-downs on the loans are recorded as charge-offs and a new cost basis is established. Any subsequent lower of cost or market adjustment is determined on an individual loan basis and is recognized as a valuation allowance with any charges included in other noninterest expense. Gains and losses on the sale of these loans are included in other noninterest income when realized. A summary of the loans held for sale at December 31, 2018 and 2017 is as follows: As of December 31, (In thousands) 2018 2017 Mortgage loans held for sale $ 17,004 $ 5,834 Commercial loans held for sale 42,457 55,525 Loans held for sale $ 59,461 $ 61,359
Loans (Excluding Acquired Credit Impaired Loans)	Loans (Excluding Acquired Credit Impaired Loans) Loans include loans that are originated by the Company and acquired loans that are not considered impaired at acquisition. Loans originated by the Company are carried at the principal amount outstanding adjusted for the allowance for credit losses, net of deferred origination fees, and unamortized discounts and premiums. Interest income is recognized based on the principal balance outstanding and the stated rate of the loan. Loan origination fees and certain direct origination costs are capitalized and recognized as an adjustment of the yield on the related loan. Loans acquired through acquisition are initially recorded at fair value. Discounts and premiums created when the loans were recorded at their estimated fair values at acquisition are accreted over the remaining term of the loan as an adjustment to the related loan’s yield. Commercial loans, including small business loans, are generally placed on nonaccrual status when principal or interest is past due ninety days or more unless the loan is well secured and in the process of collection, or when the loan is specifically determined to be impaired. Consumer loans, including residential first and second lien loans secured by real estate, are generally placed on nonaccrual status when they are 120 or more days past due. The accrual of interest, as well as the amortization/accretion of any remaining unamortized net deferred fees or costs and discount or premium, is generally discontinued at the time the loan is placed on nonaccrual status. All accrued but uncollected interest for loans that are placed on nonaccrual status is reversed through interest income. Cash receipts received on nonaccrual loans are generally applied against principal until the loan has been collected in full, after which time any additional cash receipts are recognized as interest income (i.e., cost recovery method). However, interest may be accounted for under the cash-basis method as long as the remaining recorded investment in the loan is deemed fully collectible. Loans are evaluated for potential charge-off in accordance with the parameters discussed below or when the loan is placed on non-accrual status, whichever is earlier. Loans within the commercial portfolio are generally evaluated for charge-off at 90 days past due, unless both well-secured and in the process of collection. Closed and open-end residential mortgage and consumer loans are evaluated for charge-off no later than 120 days past due. Any outstanding loan balance in excess of the fair value of the collateral less costs to sell is charged-off no later than 180 days past due for loans secured by real estate. For non-real estate secured loans, in lieu of charging off the entire loan balance, loans may be written down to the fair value of the collateral less costs to sell if repossession of collateral is assured and in process. A loan is considered to be impaired when it appears probable that the entire amount contractually due will not be collected in accordance with the terms of the loan agreement. Factors considered in determining impairment include payment status, collateral values, and the probability of collecting scheduled payments of principal and interest when due. The measurement of impaired loans is based on the present value of expected future cash flows discounted at the loan’s effective interest rate or the loan’s observable market price, or based on the fair value of the collateral less disposal costs if the loan is collateral dependent. Included in impaired loans are loans considered troubled debt restructurings (“TDRs”). The Company attempts to work with borrowers when necessary to extend or modify loan terms to better align with the borrower’s ability to repay. Extensions and modifications to loans are made in accordance with internal policies and guidelines which conform to regulatory guidance. A modification is classified as a TDR if the borrower is experiencing financial difficulty and it is determined that the Company has granted a concession to the borrower. The Company may determine that a borrower is experiencing financial difficulty if the borrower is currently in default on any of its debt, or if it is probable that a borrower may default in the foreseeable future without the modification. Concessions could include reductions of interest rates at a rate lower than current market rate for a new loan with similar risk, extension of the maturity date, reduction of accrued interest, principal forgiveness, forbearance, or other concessions. The assessments of whether a borrower is experiencing or will likely experience financial difficulty and whether a concession has been granted can be subjective in nature, and management’s judgment is required when determining whether a modification is classified as a TDR.
Allowance for Credit Losses	Allowance for Credit Losses The allowance for credit losses (“ACL”) is established through charges to income in the form of a provision for credit losses. The ACL is maintained at a level that management believes is adequate to absorb all probable losses inherent in the loan portfolio which are incurred as of the reporting date. Events that are not within the Company’s control, such as changes in economic factors, could change subsequent to the reporting date and could cause the ACL to be overstated or understated. The amount of the ACL is affected by loan charge-offs, which decrease the ACL; recoveries on loans previously charged off, which increase the ACL; and the provision for credit losses charged to income, which increases the ACL. In determining the provision for credit losses, management monitors fluctuations in the ACL resulting from actual charge-offs and recoveries and reviews the size and composition of the loan portfolio in light of current and anticipated economic conditions. The ACL is comprised of the following four components: • Specific reserves are recorded on loans reviewed individually for impairment. Generally, all loans that are individually identified as impaired are reviewed on a quarterly basis in order to determine whether a specific reserve is required. A loan is considered impaired when, based on current information, it is probable that we will not receive all amounts due in accordance with the contractual terms of the loan agreement. Once a loan has been identified as impaired, management measures impairment in accordance with ASC Topic 310, “Receivables.” The measurement of impaired loans is based on the present value of expected future cash flows discounted at the loan’s effective interest rate or the loan’s observable market price or based on the fair value of the collateral if the loan is collateral dependent. When management’s measured value of the impaired loan is less than the recorded investment in the loan, the amount of the impairment is recorded as a specific reserve. These specific reserves are determined on an individual loan basis based on management’s current evaluation of the loss exposure for each credit, given the payment status, the financial condition of the borrower and any guarantors and the value of any underlying collateral. Loans that are individually identified as impaired are excluded from the general reserve calculation described below. Changes in specific reserves from period to period are the result of changes in the circumstances of individual loans such as charge-offs, payments received, changes in collateral values or other factors. • For loans not considered to be impaired, a general reserve is maintained for each loan segment in the loan portfolio. Due to the growth of the credit portfolio into new geographic areas and into new commercial segmentations and the lack of seasoning of the portfolio, the Company recognizes there is limited historical loss information to adequately estimate loss rates based primarily on historical loss data. Therefore, external loss data was acquired from the research arm of a nationally recognized risk rating agency to act as a proxy for loss rates within the ACL model until sufficient loss history can be accumulated from the Company’s loss experience in these segments. These loss rates were developed specifically for the Company’s customer risk profile and portfolio mix. The Company monitors actual loss experience for each loan segment for adjustments required to the loss rates utilized. • In assessing the overall risk of the credit portfolio, the ACL Committee also considers the following qualitative factors that may affect credit losses within the current credit portfolio. Management discretion dictates how these factors should affect certain segments (or the entire portfolio) according to a number of basis points to be added to (or subtracted from) loan loss rates. By their nature, qualitative adjustments attempt to quantify and standardize factors that serve as “leading indicators” of credit deterioration or improvement. These primary adjustment factors include, but are not limited to the following: • Lending policies, procedures, practices or philosophy, including underwriting standards and collection, charge-off and recovery practices • Changes in national and service market economic and business conditions that could affect the level of default rates or the level of losses once a default has occurred within the Bank’s existing loan portfolio • Changes in the nature or size of the portfolio • Changes in portfolio collateral values • Changes in the experience, ability, and depth of lending management and other relevant staff • Volume and/or severity of past due and classified credits or trends in the volume of losses, non-accrual credits, impaired credits and other credit modifications • Quality of the institution’s credit review system and processes and the degree of oversight by bank management and the board of directors • Concentrations of credit such as industry and lines of business • Competition and legal and regulatory requirements or other external factors. • In connection with acquisitions (see Accounting for Acquired Loans Management presents the quarterly review of the ACL to the Bank’s Board of Directors.. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available or as events change. The reserve for unfunded commitments is determined by assessing three distinct components: unfunded commitment volatility in the portfolio (excluding commitments related to letters of credit and commitment letters), adverse letters of credit, and adverse lines of credit. Unfunded commitment volatility is calculated on a trailing eight quarter basis; the resulting expected funding amount is then reserved for based on the current combined reserve rate of the pass-rated originated and ANCI loans. Adverse lines and letters of credit are assessed individually based on funding and loss expectations as of the period end. The reserve for unfunded commitments is recorded in other liabilities and other noninterest expense separate from the allowance and provision for credit losses. As of December 31, 2018, and 2017, the reserve for unfunded commitments totaled $0.6 million and $0.8 million, respectively.
Accounting for Acquired Loans and FDIC Loss Share Receivable	Accounting for Acquired Loans Acquired Loans The Company accounts for its acquisitions under ASC Topic 805, which requires the use of the acquisition method of accounting. All identifiable assets acquired, including loans, are recorded at fair value. No ACL related to the acquired loans is recorded on the acquisition date as the fair value of the loans acquired incorporates assumptions regarding credit risk. Loans acquired are recorded at fair value in accordance with the fair value methodology prescribed in ASC Topic 820. The fair value estimates associated with the loans include estimates related to the amount and timing of undiscounted expected principal, interest and other cash flows, as well as the appropriate discount rate. At the time of acquisition, the Company estimated the fair value of the total acquired loan portfolio by segregating the portfolio into loan pools with similar characteristics and certain specifically-reviewed non-homogeneous loans. The similar characteristics used to establish the pools included: • Risk rating, • The loan type based on regulatory reporting guidelines; namely whether the loan was a residential, construction, consumer, or commercial loan, and • The nature of collateral. From these pools, the Company used certain loan information, including outstanding principal balance, estimated probability of default and loss given default, weighted average maturity, weighted average term to re-price (if a variable rate loan), estimated prepayment rates, and weighted average interest rate to estimate the expected cash flow for each loan pool. For the specifically-reviewed loans expected cash flows were determined for each loan based on current performance and collateral values, if the loan is collateral dependent. The Company accounts for and evaluates acquired credit impaired (“ACI”) loans in accordance with the provisions of ASC Topic 310-30. When ACI loans exhibit evidence of credit deterioration since origination and it is probable at the date of acquisition that the Company will not collect all principal and interest payments in accordance with the terms of the loan agreement, the expected shortfall in future cash flows, as compared to the contractual amount due, is recognized as a non-accretable discount. Any excess of expected cash flows over the acquisition date fair value is known as the accretable discount and is recognized as accretion income over the life of each pool or individual loan. ACI loans that meet the criteria for non-accrual of interest at the time of acquisition may be considered performing upon acquisition, regardless of whether the customer is contractually delinquent, if the timing and expected cash flows on such loans can be reasonably estimated and if collection of the new carrying value of such loans is expected. However, if the timing or amount of the expected cash flows cannot be reasonably estimated an ACI loan may be placed in nonaccruing status. Expected cash flows over the acquisition date fair value are periodically re-estimated utilizing the same cash flow methodology used at the time of acquisition and subsequent decreases to the expected cash flows will generally result in a provision for loan losses charge to the Company’s consolidated statements of income. Conversely, subsequent increases in expected cash flows result in a transfer from the non-accretable discount to the accretable discount, which would have a positive impact on accretion income prospectively. These cash flow evaluations are inherently subjective as they require material estimates, all of which may be susceptible to significant change.
Premises and Equipment	Premises and Equipment Premises and equipment are stated at cost, less accumulated depreciation and amortization. Depreciation and amortization are determined using the straight-line method at rates calculated to depreciate or amortize the cost of assets over their estimated useful lives. Maintenance and repairs of property and equipment are charged to expense, and major improvements that extend the useful life of the asset are capitalized. Upon retirement, sale, or other disposition of property and equipment, the cost and accumulated depreciation are eliminated from the accounts, and any gains or losses are included in income. The Company leases various premises and equipment under operating leases. The leases have varying terms, with most containing renewal or first-right-of-refusal options for multi-year periods and annual increases in base rates. Leasehold improvements are depreciated over the lesser of the estimated useful life or the lease term.
Other Real Estate	Other Real Estate Other real estate (“OREO”) consists of properties acquired through foreclosure and unutilized bank-owned properties. These properties, as held for sale properties, are recorded at fair value, less estimated costs to sell, on the date of foreclosure establishing a new cost basis for the property. Subsequent to the foreclosure date the OREO is maintained at the lower of cost or fair value. Any write-down to fair value required at the time of foreclosure is charged to the ACL. Subsequent gains or losses resulting from the sale of the property or additional valuation allowances required due to further declines in fair value are reported in other noninterest expense. The amount of loans in the process of foreclosure or physical possession for single-family residential properties was $3.8 million and $4.4 million as of December 31, 2018 and 2017, respectively. The amount of residential real estate properties held in OREO was $0.9 million and $2.7 million as of December 31, 2018 and 2017, respectively.
Cash Surrender Value of Life Insurance	Cash Surrender Value of Life Insurance The Company invests in bank-owned life insurance (“BOLI”), which involves the purchasing of life insurance on selected employees. The Company is the owner of the policies and, accordingly, the cash surrender value of the policies is included in total assets, and increases in cash surrender values are reported as income in the consolidated statements of income. The cash value accumulation on BOLI is permanently tax deferred if the policy is held to the insured person’s death and certain other conditions are met.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill is accounted for in accordance with ASC Topic 350, and accordingly is not amortized but is evaluated for impairment at least annually in the fourth quarter or more frequently if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount. As part of its testing, the Company may elect to first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If the results of the qualitative assessment indicate that more likely than not a reporting unit’s fair value is less than its carrying amount, the Company determines the fair value of the respective reporting unit (through the application of various quantitative valuation methodologies) relative to its carrying amount to determine whether quantitative indicators of potential impairment are present (i.e., Step 1). The Company may also elect to bypass the qualitative assessment and begin with Step 1. If the results of Step 1 indicate that the fair value of the reporting unit may be below its carrying amount, the Company determines the fair value of the reporting unit’s assets and liabilities, considering deferred taxes, and then measures impairment loss by comparing the implied fair value of goodwill with the carrying amount of that goodwill (i.e., Step 2). A reporting unit is defined as an operating segment or a component of that operating segment, as defined in ASC 280. Reporting units may vary, depending on the level at which performance of the segment is reviewed. No impairment was identified in any reporting unit in 2018, 2017 or 2016. Other identifiable intangible assets consist primarily of the core deposit premiums and customer relationships arising from acquisitions. These intangibles were established using the discounted cash flow approach and are being amortized using an accelerated method over the estimated remaining life of each intangible recorded at acquisition. These finite-lived intangible assets are reviewed for impairment when events or changes in circumstances indicate that the asset’s carrying amount may not be recoverable from undiscounted future cash flows or that it may exceed its fair value.
Net Profits Interests	Net Profits Interests The Bank owns a net profits interest in oil and gas reserves received in connection with the reorganization under bankruptcy of a loan customer. In the fourth quarter of 2018, the Company sold a previously owned net profit interest for $5.3 million. These interests are considered financial interests and are recorded at estimated fair value using discounted cash flow analyses applied to the expected cash flows from the producing developed wells. Because the expected cash flows are based on the current and projected prices for oil and gas, the fair value is subject to change based on these commodity markets. Any adjustments to fair value will be recorded in other noninterest income. The amount in other assets was $5.8 million and $15.8 million as of December 31, 2018 and 2017, respectively. See Note 19, Disclosure About Fair Value of Financial Instruments, for more information.
Income Taxes	Income Taxes The Company and its significant subsidiaries are subject to income taxes in federal, state and local jurisdictions, and such corporations account for income taxes under the asset and liability method in accordance with ASC Topic 740. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and net operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The recognition of a net deferred tax asset is dependent upon a “more likely than not” expectation of realization of the net deferred tax asset, based upon the analysis of available evidence. The net deferred tax asset recoverability is calculated using a consistent approach, which considers the relative impact of negative and positive evidence, including review of historical financial performance, and all sources of future taxable income, such as projections of future taxable income exclusive of future reversals of temporary differences and carryforwards, tax planning strategies, and any carryback availability. A valuation allowance is required to sufficiently reduce the net deferred tax asset to the amount that is expected to be realized on a “more likely than not” basis. Changes in the valuation allowance are generally recorded through income.
Treasury Stock and Share Repurchases	Treasury Stock and Share Repurchases In October 2018, the Company’s Board of Directors authorized a share repurchase program in an amount of up to $50 million as part of the Company’s overall capital management strategies. See Note 2, Subsequent Events for information regarding shares repurchased after year end. The purchase of the Company’s common stock is recorded at cost. At the date of repurchase, shareholders’ equity is reduced by the repurchase price. Upon retirement, or upon purchase for constructive retirement, treasury stock would be reduced by the cost of such stock with the excess of repurchase price over par or stated value recorded in additional paid-in capital. If the Company subsequently reissues treasury shares, treasury stock is reduced by the cost of such stock with differences recorded in additional paid-in capital or retained earnings, as applicable.
Revenue Recognition	Revenue Recognition Service Charges on Deposit Accounts Service charges on deposit accounts consist of non-sufficient funds fees, account analysis fees, and other service charges on deposits which consist primarily of monthly account fees. Non-sufficient funds fees are recognized at the time the account overdraft occurs in accordance with regulatory guidelines. Account analysis fees consist of fees charged to certain commercial demand deposit accounts based upon account activity (and reduced by a credit which is based upon cash levels in the account). Insurance Commissions and Fees Commission revenue is recognized as of the effective date of the insurance policy, the date the customer is billed, or the date the commission is received, whichever is later. The Company also receives contingent commissions from insurance companies as additional incentive for achieving specified premium volume goals and/or the loss experience of the insurance placed. The Company recognizes contingent commissions from insurance companies when determinable, which is generally when such commissions are received or when data is received from the insurance companies that allow the reasonable estimation of these amounts. Commission adjustments are recorded, including policy cancellations and override commissions, when the adjustments become reasonably estimable, which is generally in the period in which they occur. Assets Under Administration and Asset Management Fees The Company does not include assets held in fiduciary or agency capacities in the consolidated balance sheets, as such items are not assets of the Company. Fees from asset management activities are recorded on an accrual basis, over the period in which the service is provided. Fees are a function of the market value of assets administered and managed, the volume of transactions, and fees for other services rendered, as set forth in the underlying client agreement. This revenue recognition involves the use of estimates and assumptions, including components that are calculated based on estimated asset valuations and transaction volumes. Credit Related Fees Credit related fees primarily include fees assessed on the unused portion of commercial lines of credit (“unused commitment fees”) and syndication agent fees. Unused commitment fees are recognized when earned. Syndication agent fees are generally recognized when the transaction is complete. Bankcard Fees Bankcard fees include primarily bankcard interchange revenue, which is recorded when services are provided.
Basic and Diluted Earnings Per Share	Basic and Diluted Earnings Basic earnings per share is calculated using the two-class method to determine income attributable to common shareholders. Unvested share-based payment awards that contain nonforfeitable rights to dividends are considered participating securities under the two-class method. Net income attributable to common shareholders is then divided by the weighted average number of common shares outstanding for the period. Diluted earnings per share reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that then shared on the net income of the Company. Diluted earnings per share is calculated by dividing net income available to common shareholders by the total of the weighted average number of common shares outstanding during the period, plus the dilutive effect of outstanding share-based compensation awards.
Comprehensive Income	Comprehensive Income Accounting principles generally require that recognized revenue, expenses, gains, and losses be included in net income. Although certain changes in assets and liabilities, such as unrealized gains and losses on available for sale securities, pension liability and cash flow hedges, are reported as a separate component of the shareholder’s equity section of the consolidated balance sheets, such items, along with net income, are components of comprehensive income.
Employee Benefits	Employee Benefits The Company offers a 401(k) defined contribution benefit plan to its employees. The plan provides for a 100% match of employee contributions up to three percent of employee compensation and a 50% match of employee contributions on the next three percent of employee compensation. All contributions and related earnings are 100% vested. Employees of the legacy Cadence Bank hired prior to January 1, 2001 participate in a noncontributory defined benefit pension plan. The plan calls for benefits to be paid to eligible employees at retirement based primarily upon years of service and compensation. Contributions to the plan reflect benefits attributed to employees’ services to date, as well as services expected to be provided in the future. The annual pension cost charged to expense is actuarially determined in accordance with the provisions of ASC Topic 715, “Compensation-Retirement Benefits.” The plan was amended effective January 1, 2001, to close participation in the plan, and employees hired subsequent to December 31, 2000, are not eligible to participate. The Company has a supplemental retirement plan that originated from an acquired bank for certain directors and officers of that acquired bank. The annual cost charged to expense and the estimated present values of the projected payments are actuarially determined in accordance with the provisions of ASC Topic 715. Prior to its acquisition by Cadence Bancorp, LLC (“LLC”), the Company entered into agreements with certain senior officers to establish an unqualified supplemental retirement plan. The plan allows for fixed payment amounts to begin on a monthly basis at age 65. The annual cost charged to expense and the estimated present value of the projected payments was determined in accordance with the provisions of ASC Topic 715. The present value of projected payments is recorded as a liability, in accordance with ASC Subtopic 710-30, in the Company’s consolidated balance sheets. The Company provides a voluntary deferred compensation plan for certain of its executive and senior officers. Under this plan, the participants may defer up to 25% of their base compensation and 100% of certain incentive compensation. The Company may, but is not obligated to, contribute to the plan. Amounts contributed to this plan are credited to a separate account for each participant and are subject to a risk of loss in the event of the Company’s insolvency. The Company made no contributions to this plan in 2018, 2017 or 2016.
Equity-Based Compensation and Equity Incentive Plan	Equity-Based Compensation and Equity Incentive Plan The Company maintains an equity incentive plan that provides for the granting of various forms of incentive equity-based compensation. The Company values these units at the grant date fair value and recognizes expense over the requisite service period. The Company’s equity–based compensation costs are recorded as a component of salaries and employee benefits in the consolidated statements of income. See Note 22 for additional information.
Cash Based Long Term Incentive Plan	Cash Based Prior to 2018 the Bank granted long-term incentive awards to certain employees that provide for cash compensation, half of which are based on the value of the shares of Cadence Bancorp LLC (“LLC”), or the quoted market price of the Company’s common stock, as determined on at least a quarterly basis. The awards are generally subject to a 36-month vesting period and the attainment of certain three-year profitability levels. The Company adjusts the accrual related to this plan on at least a quarterly basis, based on the phantom shares awarded, and the fair value of LLC’s or Company’s stock. Expense under this plan was $6.0 million, $7.3 million and $4.4 million as of December 31, 2018, 2017 and 2016, respectively.
Employee Stock Purchase Plan	Employee Stock Purchase Plan The Company provides an employee stock purchase plan whereby employees may purchase the Company’s Class A Common Stock (“Common Stock”) at a discount of 15% of the fair market value of a share of Common Stock, defined as the closing price of the Common Stock on the stock exchange for the first and last day of the purchase period (as defined). The Company records an expense for the 15% discount which is included in salaries and employee benefits in the consolidated statements of income. See Note 13 for additional information.
Cash Flows	Cash Flows For purposes of reporting cash flows, cash and cash equivalents include cash on hand and amounts due from banks, interest-bearing deposits with banks, and federal funds sold. Generally, federal funds are sold for one to seven day periods. Cash flows from loans, either originated or acquired, are classified at the time according to management’s intent to either sell or hold the loan for the foreseeable future. When management’s intent is to hold the loan for the foreseeable future, the cash flows of that loan are presented as investing cash flows.
Off-Balance Sheet Financial Instruments	Off-Balance Sheet Financial Instruments In the ordinary course of business, the Company enters into off-balance sheet financial instruments consisting of commitments to extend credit, credit card lines, standby letters of credit and commitments to purchase securities. Such financial instruments are recorded in the consolidated financial statements when they are exercised.
Fair Value of Financial Instruments	Fair Value of Financial Instruments Fair value estimates are made at a specific point in time, based on relevant market information and other information about the financial instrument. These estimates do not reflect any premium or discount that could result from offering for sale, at one time, the entire holdings of a particular financial instrument. Because no market exists for a portion of the financial instruments, fair value estimates are also based on judgments regarding estimated cash flows, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Changes in assumptions could significantly affect the estimates. Management employs independent third-party pricing services to provide fair value estimates for the Company’s investment securities available for sale and held to maturity. Fair values for investment securities and certain derivative financial instruments are typically the prices supplied by a third-party pricing service or an unrelated counterparty, which utilize quoted market prices, broker/dealer quotations for identical or similar securities, and/or inputs that are observable in the market, either directly or indirectly, for substantially similar securities. Level 1 securities are typically exchange quoted prices. Level 2 securities are typically matrix priced by a third-party pricing service to calculate the fair value. Such fair value measurements consider observable data, such as relevant broker/dealer quotes, market spreads, cash flows, yield curves, live trading levels, trade execution data, market consensus prepayments speeds, credit information, and the respective terms and conditions for debt instruments. Level 3 instruments’ value is determined using pricing models, discounted cash flow models and similar techniques, and may also include the use of market prices of assets or liabilities that are not directly comparable to the subject asset or liability. These methods of valuation may result in a significant portion of the fair value being derived from unobservable assumptions that reflect the Company’s own estimates for assumptions that market participants would use in pricing the asset or liability. Management uses various validation procedures to validate the prices received from pricing services and quotations received from dealers are reasonable for each relevant financial instrument, including reference to relevant broker/dealer quotes or other market quotes and a review of valuations and trade activity of comparable securities. Consideration is given to the nature of the quotes (e.g., indicative or firm) and the relationship of recently evidenced market activity to the prices provided by the third-party pricing service. Understanding the third-party pricing service’s valuation methods, assumptions and inputs used by the firm is an important part of the process of determining that reasonable and reliable fair values are being obtained. Management evaluates quantitative and qualitative information provided by the third-party pricing services to assess whether they continue to exhibit the high level of expertise and internal controls that management relies upon. Fair value estimates are based on existing financial instruments on the consolidated balance sheets, without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. Significant assets and liabilities that are not considered financial instruments include deferred income taxes, premises and equipment, goodwill and other intangible assets. In addition, the income tax ramifications related to the realization of the unrealized gains and losses on available for sale investment securities can have a significant effect on fair value estimates and have not been considered in any of the estimates. For further information about fair value measurements refer to Note 19.
Recently Adopted and Pending Accounting Pronouncements	Recently Adopted Accounting Pronouncements In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606),” (ASU 2014-09), which is intended to improve and converge the financial reporting requirements for revenue contracts with customers. Previous accounting guidance comprised broad revenue recognition concepts along with numerous industry-specific requirements. The new guidance establishes a five-step model which entities must follow to recognize revenue and removes inconsistencies and weaknesses in existing guidance. Our major sources of revenue are from financial instruments that have been excluded from the scope of the new standard (including loans, derivatives, debt and equity securities, etc.). The standard required us to change how we recognize certain recurring revenue streams within insurance commissions and fees and other categories of noninterest income. The adoption of ASU 2014-09 on January 1, 2018 did not have a material impact on the Company’s financial position, results of operations or cash flows. In January 2016, the FASB issued ASU 2016-01, “Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities”. ASU 2016-1, among other things, (i) requires equity investments, with certain exceptions, to be measured at fair value with changes in fair value recognized in net income, (ii) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment, (iii) eliminates the requirement for public business entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheets, (iv) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, (v) requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments, (vi) requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheets or the accompanying notes to the financial statements and (viii) clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale. The adoption of ASU 2016-01 on January 1, 2018 resulted in an adjustment to retained earnings of $1.0 million related to fair value measurements changes to equity securities and certain limited partnerships (See Notes 19 and 20). In August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments”, to reduce current diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The adoption of ASU 2016-15 on January 1, 2018 did not have a material impact on the Company’s financial position, results of operations or cash flows. In January 2017, the FASB issued ASU No. 2017-01, “Business Combinations (Topic 805): Clarifying the Definition of a Business”: ASU 2017-01 introduces amendments that are intended to clarify the definition of a business to assist companies and other reporting organizations with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The adoption of ASU 2017-01 on January 1, 2018 did not have a material impact on the Company’s financial position, results of operations or cash flows. In March 2017, the FASB issued 2017-07, “Compensation – Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Costs,” to improve the presentation of net periodic pension cost and net periodic postretirement benefit cost. The amendments require that an employer report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. The amendments also allow only the service cost component to be eligible for capitalization, when applicable. The adoption of ASU 2017-07 on January 1, 2018 did not have a material impact on the Company’s financial position, results of operations or cash flows. In May 2017, the FASB issued ASU 2017-09, “Stock Compensation (Topic 718): Scope of Modification Accounting”, which clarifies when modification accounting should be applied to changes in terms or conditions of share-based payment awards. The amendments narrow the scope of modification accounting by clarifying that modification accounting should be applied to awards if the change affects the fair value, vesting conditions, or classification of the award. The amendments do not impact current disclosure requirements for modifications, regardless of whether modification accounting is required under the new guidance. The adoption of ASU 2017-09 on January 1, 2018 did not have a material impact on the Company’s financial position, results of operations or cash flows. In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815) - Targeted Improvements to Accounting for Hedging Activities”, which amends the hedge accounting recognition and presentation requirements in ASC 815 to improve the transparency and understandability of information conveyed to financial statement users about an entity’s risk management activities to better align the entity’s financial reporting for hedging relationships with those risk management activities and to reduce the complexity of and simplify the application of hedge accounting. The Company elected to early adopt the provisions of ASU 2017-12 on January 1, 2018. The adoption did not have a material impact on the Company’s financial condition, results of operations or cash flows. Pending Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, “Leases” . In March 2017, the FASB issued ASU No. 2017-08, “Receivables-Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities”: ASU 2017-08 will shorten the amortization period for callable debt securities held at a premium to the earliest call date instead of the maturity date. The amendments do not require an accounting change for securities held at a discount, which will continue to be amortized to the maturity date. ASU No. 2017-08 will be effective for annual reporting periods beginning after December 15, 2018, including interim reporting periods within those periods. The amendments should be applied using a modified-retrospective transition method as of the beginning of the period of adoption. Early adoption is permitted, including adoption in an interim period. The adoption of ASU 2017-08 at January 1, 2019 did not have a material impact on the Company’s financial condition, results of operations or cash flows . In October 2018, the FASB issued ASU 2018-16, “Derivatives and Hedging (Topic 815): Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes”. The amendments in ASU 2018-16 permit the use of the OIS rate based on SOFR as a U.S. benchmark interest rate for hedge accounting purposes under Topic 815. The amendments should be adopted on a prospective basis for qualifying new or redesignated hedging relationships entered into on or after the date of adoption. For public business entities that have already adopted ASU 2017-12, the amendments are effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. The adoption of ASU 2018-16 at January 1, 2019, will not have an impact on the Company’s financial condition, results of operations or cash flows as the Company does not have any instruments tied to the OIS rate. In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments”. The guidance is intended to improve financial reporting by requiring timelier recording of credit losses on loans and other financial instruments. The guidance will replace the current incurred loss accounting model with an expected loss approach and requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. The guidance requires enhanced disclosures to help investors and other financial statement users better understand significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. The ASU is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The Company is evaluating the effect of adopting this new accounting guidance. In January 2017, the FASB issued ASU No. 2017-04, “Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment”: ASU 2017-04 simplifies how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Therefore, any carrying amount which exceeds the reporting unit’s fair value (up to the amount of goodwill recorded) will be recognized as an impairment loss. ASU No. 2017-04 will be effective for annual reporting periods beginning after December 15, 2019, including interim reporting periods within those periods. The amendments will be applied prospectively on or after the effective date. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. Based on recent goodwill impairments tests, which did not require the application of Step 2, the Company does not expect the adoption of this ASU to have an immediate impact. In August 2018, the FASB issued ASU No. 2018-13, “Fair Value Measurement (Topic 820)”. ASU 2018-13 amends the disclosure requirements of Topic 820. Fair Value Measurement, to remove disclosure of transfers between Level 1 and Level 2 of the fair value hierarchy and the valuation processes for Level 3 fair value measurements, among other amendments, and to include disclosure of the range and weighted average used in Level 3 fair value measurements, among other amendments. This ASU applies to all entities that are required to provide disclosures about recurring and nonrecurring fair value measurements. Amendments should be applied retrospectively to all periods presented, except for certain amendments, which should be applied prospectively. ASU No. 2018-13 will be effective for annual reporting periods after December 15, 2019, including interim periods within those periods. An entity is permitted to early adopt any removed or modified disclosures upon issuance and delay adoption of the additional disclosures until the effective date.

Summary of Accounting Policie_2

Summary of Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Loans Held for Sale	As of December 31, (In thousands) 2018 2017 Mortgage loans held for sale $ 17,004 $ 5,834 Commercial loans held for sale 42,457 55,525 Loans held for sale $ 59,461 $ 61,359

Securities (Tables)

Securities (Tables)	12 Months Ended
	Dec. 31, 2018
Investments Debt And Equity Securities [Abstract]
Summary of Amortized Cost and Estimated Fair Value of Securities Available-for-Sale and Securities Held-to-Maturity	A summary of amortized cost and estimated fair value of securities available-for-sale and securities held-to-maturity at December 31, 2018 and 2017 is as follows: (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value December 31, 2018 Securities available-for-sale: U.S. Treasury securities $ 100,413 $ — $ 3,628 $ 96,785 Obligations of U.S. government agencies 60,975 316 284 61,007 Mortgage-backed securities issued or guaranteed by U.S. agencies (MBS) Residential pass-through: Guaranteed by GNMA 85,052 146 2,093 83,105 Issued by FNMA and FHLMC 594,874 694 10,367 585,201 Other residential mortgage-backed securities 36,339 8 1,178 35,169 Commercial mortgage-backed securities 114,383 287 5,255 109,415 Total MBS 830,648 1,135 18,893 812,890 Obligations of states and municipal subdivisions 229,475 207 13,112 216,570 Total securities available-for-sale $ 1,221,511 $ 1,658 $ 35,917 $ 1,187,252 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value December 31, 2017 Securities available-for-sale: U.S. Treasury securities $ 100,575 $ — $ 3,731 $ 96,844 Obligations of U.S. government agencies 80,552 738 66 81,224 Mortgage-backed securities issued or guaranteed by U.S. agencies (MBS) Residential pass-through: Guaranteed by GNMA 106,461 676 1,110 106,027 Issued by FNMA and FHLMC 431,409 1,284 2,271 430,422 Other residential mortgage-backed securities 47,379 97 1,084 46,392 Commercial mortgage-backed securities 76,201 63 4,069 72,195 Total MBS 661,450 2,120 8,534 655,036 Obligations of states and municipal subdivisions 420,111 7,539 3,691 423,959 Total securities available-for-sale $ 1,262,688 $ 10,397 $ 16,022 $ 1,257,063 Securities held-to-maturity: Obligations of states and municipal subdivisions $ 290 $ 21 $ — $ 311
Schedule of Contractual Maturities of Securities Available-for-Sale and Debt Securities Held-to-Maturity	The scheduled contractual maturities of securities available-for-sale and debt securities held-to-maturity at December 31, 2018 were as follows: Available-for-Sale Amortized Estimated (In thousands) Cost Fair Value Due in one year or less $ — $ — Due after one year through five years 107,283 103,638 Due after five years through ten years 53,314 53,568 Due after ten years 230,266 217,156 Mortgage-backed securities 830,648 812,890 Total $ 1,221,511 $ 1,187,252
Summary of Proceeds from Sales, Gross Gains, and Gross Losses on Sales of Securities Available for Sale	Proceeds from sales, gross gains, and gross losses on sales of securities available-for-sale for the years ended December 31, 2018, 2017 and 2016 are presented below. For the Year Ended December 31, (In thousands) 2018 2017 2016 Gross realized gains $ 816 $ 167 $ 4,172 Gross realized losses (2,669 ) (313 ) (436 ) Realized (losses) gains on sale of securities available for sale, net $ (1,853 ) $ (146 ) $ 3,736 Proceeds from sales of securities available-for-sale $ 268,799 $ 161,401 $ 538,960
Schedule of Securities Classified as Available-for-Sale with Gross Unrealized Losses Aggregated by Category and Length of Time	Information pertaining to securities available-for-sale with gross unrealized losses aggregated by category and length of time the securities have been in a continuous loss position was as follows: Unrealized loss analysis Losses < 12 Months Losses > 12 Months Gross Gross Estimated Unrealized Estimated Unrealized (In thousands) Fair Value Losses Fair Value Losses December 31, 2018 U.S. Treasury securities $ — $ — $ 96,785 $ 3,628 Obligations of U.S. government agencies 25,978 183 10,152 101 Mortgage-backed securities 259,794 2,864 405,974 16,029 Obligations of states and municipal subdivisions 74,503 2,501 125,092 10,611 Total $ 360,275 $ 5,548 $ 638,003 $ 30,369 Unrealized loss analysis Losses < 12 Months Losses > 12 Months Gross Gross Estimated Unrealized Estimated Unrealized (In thousands) Fair Value Losses Fair Value Losses December 31, 2017 U.S. Treasury securities $ — $ — $ 96,844 $ 3,731 Obligations of U.S. government agencies 1,577 9 14,323 57 Mortgage-backed securities 306,274 1,490 172,324 7,044 Obligations of states and municipal subdivisions 2,601 22 134,870 3,669 Total $ 310,452 $ 1,521 $ 418,361 $ 14,501

Loans and Allowance for Credi_2

Loans and Allowance for Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2018
Accounts Notes And Loans Receivable [Line Items]
Summary of Total Loans Outstanding by Portfolio Segment and Class of Financing Receivable	The following table presents total loans outstanding by portfolio segment and class of financing receivable as of December 31, 2018 and 2017, respectively. Outstanding balances include originated loans, Acquired Noncredit Impaired (“ANCI”) loans and Acquired Credit Impaired (“ACI”) loans. Information about ACI loans is presented separately in the “Acquired Credit-Impaired Loans” section of this Note. As of (In thousands) December 31, 2018 December 31, 2017 Commercial and Industrial General C&I $ 3,275,362 $ 2,746,454 Energy sector 1,285,775 935,371 Restaurant industry 1,096,366 1,035,538 Healthcare 539,839 416,423 Total commercial and industrial 6,197,342 5,133,786 Commercial Real Estate Income producing 1,266,791 1,082,929 Land and development 63,948 75,472 Total commercial real estate 1,330,739 1,158,401 Consumer Residential real estate 2,227,653 1,690,814 Other 67,100 74,922 Total consumer 2,294,753 1,765,736 Small Business Lending 266,283 221,855 Total (Gross of unearned discount and fees) 10,089,117 8,279,778 Unearned discount and fees (35,194 ) (26,351 ) Total (Net of unearned discount and fees) $ 10,053,923 $ 8,253,427
Summary of Allowance for Credit Losses	A summary of the activity in the ACL for each of the three years in the period ended December 31, 2018 is as follows: For the Year Ended December 31, 2018 (In thousands) Commercial and Industrial Commercial Real Estate Consumer Small Business Total As of December 31, 2017 $ 55,919 $ 11,990 $ 14,983 $ 4,684 $ 87,576 Provision for loan losses 15,708 (1,837 ) (900 ) (271 ) 12,700 Charge-offs (6,709 ) (2 ) (716 ) (618 ) (8,045 ) Recoveries 1,398 301 336 112 2,147 As of December 31, 2018 $ 66,316 $ 10,452 $ 13,703 $ 3,907 $ 94,378 Allocation of ending ACL ACI loans collectively evaluated for impairment $ 58 $ 1,641 $ 6,018 $ — $ 7,717 ACI loans individually evaluated for impairment — — 207 — 207 ANCI loans collectively evaluated for impairment 293 53 535 58 939 ANCI loans individually evaluated for impairment — — 6 107 113 Originated loans collectively evaluated for impairment 58,665 8,758 6,918 3,742 78,083 Originated loans individually evaluated for impairment 7,300 — 19 — 7,319 ACL as of December 31, 2018 $ 66,316 $ 10,452 $ 13,703 $ 3,907 $ 94,378 Loans ACI loans collectively evaluated for impairment $ 13,018 $ 58,171 $ 120,717 $ — $ 191,906 ACI loans individually evaluated for impairment 3,789 7,256 324 — 11,369 ANCI loans collectively evaluated for impairment 50,469 7,808 280,776 8,462 347,515 ANCI loans individually evaluated for impairment — — 1,538 279 1,817 Originated loans collectively evaluated for impairment 6,053,264 1,257,504 1,891,144 257,542 9,459,454 Originated loans individually evaluated for impairment 76,802 — 254 — 77,056 Loans as of December 31, 2018 $ 6,197,342 $ 1,330,739 $ 2,294,753 $ 266,283 $ 10,089,117 For the Year Ended December 31, 2017 (In thousands) Commercial and Industrial Commercial Real Estate Consumer Small Business Total As of December 31, 2016 $ 54,688 $ 10,103 $ 13,265 $ 4,212 $ 82,268 Provision for loan losses 5,883 1,737 1,746 369 9,735 Charge-offs (5,645 ) (93 ) (929 ) (204 ) (6,871 ) Recoveries 993 243 901 307 2,444 As of December 31, 2017 $ 55,919 $ 11,990 $ 14,983 $ 4,684 $ 87,576 Allocation of ending ACL ACI loans collectively evaluated for impairment $ 5 $ 2,006 $ 6,289 $ — $ 8,300 ACI loans individually evaluated for impairment — 4 220 — 224 ANCI loans collectively evaluated for impairment 864 130 49 295 1,338 ANCI loans individually evaluated for impairment — — 36 22 58 Originated loans collectively evaluated for impairment 46,591 9,850 8,389 4,362 69,192 Originated loans individually evaluated for impairment 8,459 — — 5 8,464 ACL as of December 31, 2017 $ 55,919 $ 11,990 $ 14,983 $ 4,684 $ 87,576 Loans ACI loans collectively evaluated for impairment $ 19,486 $ 71,675 $ 150,798 $ — $ 241,959 ACI loans individually evaluated for impairment 10,091 8,186 324 — 18,601 ANCI loans collectively evaluated for impairment 58,775 15,926 113,357 11,331 199,389 ANCI loans individually evaluated for impairment — — 1,582 310 1,892 Originated loans collectively evaluated for impairment 4,974,973 1,062,614 1,499,260 209,627 7,746,474 Originated loans individually evaluated for impairment 70,461 — 415 587 71,463 Loans as of December 31, 2017 $ 5,133,786 $ 1,158,401 $ 1,765,736 $ 221,855 $ 8,279,778 For the Year Ended December 31, 2016 (In thousands) Commercial and Industrial Commercial Real Estate Consumer Small Business Total As of December 31, 2015 $ 55,824 $ 8,136 $ 13,450 $ 2,373 $ 79,783 Provision for loan losses 43,782 1,389 1,506 2,671 49,348 Charge-offs (46,367 ) — (2,094 ) (841 ) (49,302 ) Recoveries 1,449 578 403 9 2,439 As of December 31, 2016 $ 54,688 $ 10,103 $ 13,265 $ 4,212 $ 82,268 Allocation of ending ACL ACI loans collectively evaluated for impairment $ 176 $ 2,652 $ 7,215 $ — $ 10,043 ACI loans individually evaluated for impairment — 3 232 — 235 ANCI loans collectively evaluated for impairment 299 243 94 272 908 ANCI loans individually evaluated for impairment — — 37 33 70 Originated loans collectively evaluated for impairment 52,615 7,205 5,687 3,900 69,407 Originated loans individually evaluated for impairment 1,598 — — 7 1,605 ACL as of December 31, 2016 $ 54,688 $ 10,103 $ 13,265 $ 4,212 $ 82,268
Summary of Impaired Loans	The following includes certain key information about individually impaired loans as of December 31, 2018 and 2017. Originated and ANCI Loans Identified as Impaired As of December 31, 2018 (In thousands) Recorded Investment in Impaired Loans (1) Unpaid Principal Balance Related Specific Allowance Nonaccrual Loans Included in Impaired Loans Undisbursed Commitments With no related allowance for credit losses Commercial and Industrial Energy sector $ 20,713 $ 33,908 $ — $ 20,713 $ 3,658 Total commercial and industrial 20,713 33,908 — 20,713 3,658 Consumer Residential real estate 1,538 1,535 — — — Total consumer 1,538 1,535 — — — Total $ 22,251 $ 35,443 $ — $ 20,713 $ 3,658 With allowance for credit losses recorded Commercial and Industrial General C&I $ 28,684 $ 28,677 $ 3,559 $ 24,103 $ 930 Restaurant industry 23,043 23,698 3,485 22,042 2,329 Healthcare 4,496 4,496 256 4,496 - Total commercial and industrial 56,223 56,871 7,300 50,641 3,259 Consumer Other 254 254 25 — — Total consumer 254 254 25 — — Small Business Lending 476 1,249 107 229 10 Total $ 56,953 $ 58,374 $ 7,432 $ 50,870 $ 3,269 As of December 31, 2017 (In thousands) Recorded Investment in Impaired Loans (1) Unpaid Principal Balance Related Specific Allowance Nonaccrual Loans Included in Impaired Loans Undisbursed Commitments With no related allowance for credit losses Commercial and Industrial General C&I $ 5,010 $ 4,994 $ — $ 192 $ — Energy sector 14,822 23,307 — 14,822 387 Total commercial and industrial 19,832 28,301 — 15,014 387 Consumer Residential real estate 1,093 1,097 — 35 — Other 416 415 — — — Total consumer 1,509 1,512 — 35 — Small Business Lending 249 695 — 249 — Total $ 21,590 $ 30,508 $ — $ 15,298 $ 387 With allowance for credit losses recorded Commercial and Industrial Energy sector $ 39,857 $ 43,416 $ 8,353 $ 28,000 $ 402 Restaurant industry 11,017 10,969 106 — 2,500 Total commercial and industrial 50,874 54,385 8,459 28,000 2,902 Consumer Residential real estate 496 494 36 — — Small Business Lending 650 921 27 60 — Total $ 52,020 $ 55,800 $ 8,522 $ 28,060 $ 2,902 (1) The recorded investment of a loan also includes any interest receivable, net unearned discount or fees, and unamortized premium or discount.
Originated and Acquired Non Credit Impaired Loans
Accounts Notes And Loans Receivable [Line Items]
Summary of Average Recorded Investment in Impaired Originated and ANCI Loans	Average Recorded Investment in Impaired Originated and ANCI Loans Year Ended December 31, (In thousands) 2018 2017 2016 Commercial and Industrial General C&I $ 10,834 $ 8,586 $ 11,291 Energy sector 27,348 108,751 158,192 Restaurant industry 16,600 2,203 — Healthcare 1,124 — — Total commercial and industrial 55,906 119,540 169,483 Consumer Residential real estate 1,557 1,426 1,206 Other 313 386 398 Total consumer 1,870 1,812 1,604 Small Business Lending 420 945 547 Total $ 58,196 $ 122,297 $ 171,634
Summary of Originated and ANCI Loans that were modified into TDRs	Originated and ANCI Loans modified into TDRs For the Year Ended December 31, 2018 2017 2016 (In thousands) Number of TDRs Recorded Investment Number of TDRs Recorded Investment Number of TDRs Recorded Investment Commercial and Industrial 4 $ 30,244 3 $ 16,027 6 $ 43,609 Consumer — — 2 739 2 534 Small Business Lending 2 141 1 138 1 552 Total 6 $ 30,385 6 $ 16,904 9 $ 44,695 For the Year Ended December 31, 2018 2017 2016 Number of Loans Modified by: Rate Concession Modified Terms and/ or Other Concessions Rate Concession Modified Terms and/ or Other Concessions Forbearance Agreement Rate Concession Modified Terms and/ or Other Concessions Commercial and Industrial — 4 2 1 2 1 3 Consumer — — — 2 — — 2 Small Business Lending 2 — 1 — — 1 — Total 2 4 3 3 2 2 5
Summary of Credit Exposure by Portfolio Segment and Class of Receivable	The following provides information regarding the credit exposure by portfolio segment and class of receivable as of December 31, 2018 and 2017: As of December 31, 2018 (Recorded Investment in thousands) Special Mention Substandard Doubtful Total Criticized / Classified Commercial and Industrial General C&I $ 74,592 $ 79,815 $ — $ 154,407 Restaurant industry 24,449 26,171 — 50,620 Energy sector 11,812 6,227 14,486 32,525 Healthcare — 4,496 — 4,496 Total commercial and industrial 110,853 116,709 14,486 242,048 Commercial Real Estate Land and development — 985 — 985 Total commercial real estate — 985 — 985 Consumer (1) Residential real estate — 3,315 — 3,315 Total consumer — 3,315 — 3,315 Small Business Lending 772 2,013 — 2,785 Total $ 111,625 $ 123,022 $ 14,486 $ 249,133 (1) During the third quarter of 2018, the Company began determining the risk rating classification for its consumer portfolio based on delinquency and nonaccrual status in accordance with the Uniform Retail Credit Classification guidance, which contributed to a lower amount of criticized and classified loans from the previous periods. As of December 31, 2017 (Recorded Investment in thousands) Special Mention Substandard Doubtful Total Criticized / Classified Commercial and Industrial General C&I $ 80,550 $ 47,324 $ — $ 127,874 Restaurant industry 4,536 12,506 — 17,042 Energy sector — 99,979 7,634 107,613 Healthcare — 71 — 71 Total commercial and industrial 85,086 159,880 7,634 252,600 Commercial Real Estate Income producing — 26 — 26 Land and development 20 — — 20 Total commercial real estate 20 26 — 46 Consumer Residential real estate 7,610 12,416 — 20,026 Other 673 356 4 1,033 Total consumer 8,283 12,772 4 21,059 Small Business Lending 3,480 1,375 27 4,882 Total $ 96,869 $ 174,053 $ 7,665 $ 278,587
Past Due Financing Receivables	The following provides an aging of past due loans by portfolio segment and class of receivable as of December 31, 2018 and 2017: Aging of Past Due Originated and ANCI Loans As of December 31, 2018 Accruing Loans Non-Accruing Loans (Recorded Investment in thousands) 30-59 DPD 60-89 DPD 90+DPD 0-29 DPD 30-59 DPD 60-89 DPD 90+DPD Commercial and Industrial General C&I $ 120 $ — $ — $ 23,928 $ 176 $ — $ — Restaurant industry — — — 22,043 — — — Energy sector — — — 20,712 — — — Healthcare — — — 4,496 — — — Total commercial and industrial 120 — — 71,179 176 — — Commercial Real Estate Income producing — — — — — — — Land and development — 61 — — — — — Total commercial real estate — 61 — — — — — Consumer Residential real estate 1,275 315 760 876 151 95 1,429 Other 27 112 — — — — — Total consumer 1,302 427 760 876 151 95 1,429 Small Business Lending 491 25 — 250 29 4 50 Total $ 1,913 $ 513 $ 760 $ 72,305 $ 356 $ 99 $ 1,479 As of December 31, 2017 Accruing Loans Non-Accruing Loans (Recorded Investment in thousands) 30-59 DPD 60-89 DPD 90+DPD 0-29 DPD 30-59 DPD 60-89 DPD 90+DPD Commercial and Industrial General C&I $ 59 $ — $ 476 $ — $ 192 $ — $ — Energy sector — — — 32,315 — — 10,507 Healthcare — — — — 71 — — Total commercial and industrial 59 — 476 32,315 263 — 10,507 Commercial Real Estate Income producing — — 26 — — — — Land and development 55 — — — — — — Total commercial real estate 55 — 26 — — — — Consumer Residential real estate 3,191 1,030 325 1,070 173 293 2,205 Other 532 3 — — — — — Total consumer 3,723 1,033 325 1,070 173 293 2,205 Small Business Lending 931 328 — 110 38 — 494 Total $ 4,768 $ 1,361 $ 827 $ 33,495 $ 474 $ 293 $ 13,206
ACI Loans
Accounts Notes And Loans Receivable [Line Items]
Summary of Total Loans Outstanding by Portfolio Segment and Class of Financing Receivable	The following table presents total ACI loans outstanding by portfolio segment and class of financing receivable as of December 31, 2018 and 2017. As of (In thousands) December 31, 2018 December 31, 2017 Commercial and Industrial General C&I $ 16,807 $ 23,428 Healthcare — 6,149 Total commercial and industrial 16,807 29,577 Commercial Real Estate Income producing 65,427 79,861 Total commercial real estate 65,427 79,861 Consumer Residential real estate 120,495 149,942 Other 546 1,180 Total consumer 121,041 151,122 Total $ 203,275 $ 260,560
Summary of Credit Exposure by Portfolio Segment and Class of Receivable	The following provides information regarding the credit exposure by portfolio segment and class of receivable as of December 31, 2018 and 2017: ACI Loans by Risk Rating / Delinquency Stratification ACI loans based on internal risk rating: As of December 31, 2018 December 31, 2017 (Recorded Investment in thousands) Special Mention Substandard Doubtful Special Mention Substandard Doubtful Commercial and Industrial General C&I $ 426 $ 1,445 $ 39 $ 737 $ 1,173 $ 37 Healthcare — — — — 6,148 — Total commercial and industrial 426 1,445 39 737 7,321 37 Commercial Real Estate Income producing 1,207 3,080 — 2,179 6,515 — Total commercial real estate 1,207 3,080 — 2,179 6,515 — Consumer Residential real estate 89 4,442 — 3,900 22,635 — Other — 3 — 114 417 — Total consumer 89 4,445 — 4,014 23,052 Total $ 1,722 $ 8,970 $ 39 $ 6,930 $ 36,888 $ 37
Past Due Financing Receivables	ACI Consumer credit exposure, based on past due status: As of December 31, 2018 (1) December 31, 2017 (Recorded Investment in thousands) Residential Real Estate Other Residential Real Estate Other 0 – 29 Days Past Due $ 115,404 $ 845 $ 139,662 $ 1,356 30 – 59 Days Past Due 1,985 91 2,299 120 60 – 89 Days Past Due 1,435 — 2,496 62 90 – 119 Days Past Due 217 3 399 — 120 + Days Past Due 3,598 — 7,480 45 Total $ 122,639 $ 939 $ 152,336 $ 1,583 (1) During the third quarter of 2018, the Company began determining the risk rating classification for its consumer portfolio based on delinquency and nonaccrual status in accordance with the Uniform Retail Credit Classification guidance, which contributed to a lower amount of nonaccrual loans from the previous periods.
Summary of Changes in Accretable Discount for ACI Loans	Changes in the amount of accretable discount for ACI loans for each of the years in the period ended December 31, 2018: Changes in Accretable Yield on ACI Loans For the Year Ended December 31, (In thousands) 2018 2017 2016 Balance at beginning of period $ 78,422 $ 98,728 $ 122,791 Maturities/payoff (7,456 ) (9,888 ) (11,563 ) Charge-offs (77 ) (129 ) (286 ) Foreclosure (436 ) (1,061 ) (1,041 ) Accretion (19,813 ) (23,303 ) (30,870 ) Reclass from nonaccretable difference due to increases in expected cash flow 16,765 14,075 19,697 Balance at end of period $ 67,405 $ 78,422 $ 98,728
Summary of Individually Impaired ACI Loans and Pooled ACI Loans	The following includes certain key information about individually impaired ACI loans and pooled ACI loans as of and for the years ended December 31, 2018 and 2017. ACI Loans / Pools Identified as Impaired As of December 31, 2018 ACI Loans / Pools Identified as Impaired (In thousands) Recorded Investment in Impaired Loans (1) Unpaid Principal Balance Related Specific Allowance Nonaccrual Loans Included in Impaired Loans Undisbursed Commitments Commercial and Industrial $ 2,100 $ 2,331 $ 58 $ — $ — Commercial Real Estate 74,017 97,613 1,641 — — Consumer 18,301 17,888 6,225 — — Total $ 94,418 $ 117,832 $ 7,924 $ — $ — As of December 31, 2017 ACI Loans / Pools Identified as Impaired (In thousands) Recorded Investment in Impaired Loans (1) Unpaid Principal Balance Related Specific Allowance Nonaccrual Loans Included in Impaired Loans Undisbursed Commitments Commercial and Industrial $ 13,541 $ 17,630 $ 5 $ — $ — Commercial Real Estate 82,856 112,330 2,010 225 — Consumer 18,603 22,064 6,509 — — Total $ 115,000 $ 152,024 $ 8,524 $ 225 $ — (1) The recorded investment of a loan also includes any interest receivable, net unearned discount or fees, and unamortized premium or discount.

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2018
Property Plant And Equipment [Abstract]
Components of Premises and Equipment	Premises and equipment are stated at cost, less accumulated depreciation and amortization, as follows: December 31, (In thousands) Estimated Useful Life in Years 2018 2017 Premises: Land — $ 16,604 $ 16,875 Buildings, construction and improvements (1) 2-40 54,298 53,620 Total premises 70,902 70,495 Equipment 3-10 40,960 34,123 Total premises and equipment 111,862 104,618 Less: Accumulated depreciation and amortization (48,241 ) (41,186 ) Total premises and equipment, net $ 63,621 $ 63,432 (1) Leasehold improvements are depreciated over the lesser of the estimated useful life or the lease term.
Future Minimum Lease Payments under Operating Leases	The following is a schedule by year of future minimum lease payments under operating leases, as of December 31, 2018: (In thousands) Property Equipment Total 2019 $ 10,005 $ 299 $ 10,304 2020 9,103 158 9,261 2021 8,445 72 8,517 2022 6,220 — 6,220 2023 3,968 — 3,968 Thereafter 5,302 — 5,302 Total minimum lease payments $ 43,043 $ 529 $ 43,572

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Summary of Goodwill and Other Intangible Assets	The following table summarizes the Company’s goodwill and other intangible assets at December 31, 2018 and 2017: December 31, (In thousands) 2018 2017 Goodwill $ 307,083 $ 317,817 Core deposit intangible, net of accumulated amortization of $39,385 and $38,091, respectively 301 1,595 Customer lists, net of accumulated amortization of $19,709 and $18,097, respectively 6,992 8,604 Trademarks 24 24 Total goodwill and intangible assets $ 314,400 $ 328,040
Summary of Estimated Amortization Expense	The estimated amortization expense (In thousands) Amount 2019 $ 1,344 2020 910 2021 805 2022 735 2023 and thereafter 3,500

Derivatives (Tables)

Derivatives (Tables)	12 Months Ended
	Dec. 31, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Schedule of Notional Amounts and Estimated Fair Values	The notional amounts and estimated fair values as of December 31, 2018 and 2017 were as follows: December 31, 2018 December 31, 2017 Fair Value Fair Value (In thousands) Notional Amount Other Assets Other Liabilities Notional Amount Other Assets Other Liabilities Derivatives designated as hedging instruments (cash flow hedges): Commercial loan interest rate swaps $ 650,000 $ — $ 23,968 $ 1,032,000 $ — $ 21,394 Derivatives not designated as hedging instruments: Commercial loan interest rate swaps 1,155,942 4,439 1,777 737,533 2,056 2,056 Commercial loan interest rate caps 88,430 239 239 186,290 153 153 Commercial loan interest rate floors 652,822 5,587 5,587 330,764 1,054 1,054 Commercial loan interest rate collars 80,000 96 96 — — — Mortgage loan held for sale interest rate lock commitments 5,286 72 — 6,119 50 — Mortgage loan forward sale commitments 1,959 5 — 4,565 10 — Mortgage loan held for sale floating commitments 14,690 — — 11,800 — — Foreign exchange contracts 46,971 698 683 41,688 635 623 Total derivatives not designated as hedging instruments 2,046,100 11,136 8,382 1,318,759 3,958 3,886 Total derivatives $ 2,696,100 $ 11,136 $ 32,350 $ 2,350,759 $ 3,958 $ 25,280
Schedule of Gain (Loss) in Consolidated Statements of Income Related to Derivative Instruments	Pre-tax For the Year Ended December 31, 2018 2017 2016 (In thousands) OCI Reclassified from AOCI to interest income Noninterest income OCI Reclassified from AOCI to interest income Noninterest income OCI Reclassified from AOCI to interest income Noninterest income Derivatives designated as hedging instruments (cash flow hedges): Commercial loan interest rate swaps $ (7,711 ) $ (5,164 ) $ — $ (1,426 ) $ 3,705 $ — $ (7,444 ) $ 11,255 $ 166 Derivatives not designated as hedging instruments: Mortgage loans held for sale interest rate lock commitments $ — $ — $ 22 $ — $ — $ (39 ) $ — $ — $ 24 Foreign exchange contracts — — 2,222 — — 2,271 — — 1,264
Schedule of Interest Rate Swap Agreements	In June 2015 and March 2016, the Company entered into the following interest rate swap agreements to manage overall cash flow changes related to interest rate risk exposure on benchmark interest rate loans. Effective Date Maturity Date Notional Amount (In Thousands) Fixed Rate Variable Rate June 30, 2015 December 31, 2019 $ 300,000 1.5120 % 1 Month LIBOR March 8, 2016 February 27, 2026 175,000 1.5995 1 Month LIBOR March 8, 2016 February 27, 2026 175,000 1.5890 1 Month LIBOR

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2018
Banking And Thrift [Abstract]
Scheduled Maturities of Time Deposits Included in Interest-Bearing Deposits	At December 31, 2018, the scheduled maturities of time deposits included in interest-bearing deposits were as follows:

Borrowed Funds (Tables)

Borrowed Funds (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Summary of Securities Sold Under Agreements to Repurchase	Information concerning the Company’s securities sold under agreements to repurchase as of December 31, 2018 and 2017 is summarized as follows: December 31, (In thousands) 2018 2017 Balance at period end $ 1,106 $ 1,026 Average balance during the period 1,630 3,371 Average interest rate during the period 0.25 % 0.25 % Maximum month-end balance during the period $ 2,384 $ 6,286
Summary of Debt	Details of the debt transactions are as follows: (In thousands) 2018 2017 Cadence Bancorporation: 4.875% senior notes, due June 28, 2019 $ 145,000 $ 145,000 5.375% senior notes, due June 28, 2021 50,000 50,000 7.250% subordinated notes, due June 28, 2029, callable in 2024 35,000 35,000 6.500% subordinated notes, due March 2025, callable in 2020 40,000 40,000 Total — Cadence Bancorporation 270,000 270,000 Cadence Bank: 6.250% subordinated notes, due June 28, 2029, callable in 2024 25,000 25,000 Debt issue cost and unamortized premium (1,211 ) (1,606 ) Purchased 4.875% senior notes, due June 28, 2019 (10,078 ) (10,078 ) Total $ 283,711 $ 283,316
Summary of Junior Subordinated Debt	The following is a list of junior subordinated debt: December 31, (In thousands) 2018 2017 Junior subordinated debentures, 3 month LIBOR plus 2.85%, due 2033 $ 30,000 $ 30,000 Junior subordinated debentures, 3 month LIBOR plus 2.95%, due 2033 5,155 5,155 Junior subordinated debentures, 3 month LIBOR plus 1.75%, due 2037 15,464 15,464 Total par value 50,619 50,619 Purchase accounting adjustment, net of amortization (13,666 ) (14,147 ) Total junior subordinated debentures $ 36,953 $ 36,472

Other Noninterest Income and _2

Other Noninterest Income and Other Noninterest Expense (Tables)	12 Months Ended
	Dec. 31, 2018
Other Nonoperating Income Expense [Abstract]
Summary of Other Noninterest Income and Other Noninterest Expense	The detail of the other noninterest income and other noninterest expense captions presented in the consolidated statements of income is as follows: For the Year Ended December 31, (In thousands) 2018 2017 2016 Other noninterest income Insurance revenue $ 2,677 $ 7,378 $ 7,717 Bankcard fees 5,951 7,310 7,270 Income from bank owned life insurance policies 3,450 3,313 2,954 Other 6,033 6,655 (263 ) Total other noninterest income $ 18,111 $ 24,656 $ 17,678 For the Year Ended December 31, (In thousands) 2018 2017 2016 Other noninterest expense Net cost of operation of other real estate owned $ 653 $ 2,251 $ 3,033 Data processing expense 8,775 7,590 6,280 Consulting and professional fees 13,285 9,090 6,728 Loan related expenses 3,145 2,379 3,114 FDIC insurance 4,645 4,275 7,228 Communications 2,773 2,837 2,656 Advertising and public relations 2,523 2,048 1,369 Legal expenses 3,732 4,274 2,721 Other 27,649 25,921 27,469 Total other noninterest expense $ 67,180 $ 60,665 $ 60,598

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Components of the Consolidated Income Tax Expense	The components of the consolidated income tax expense are as follows: For the Year Ended December 31, (In thousands) 2018 2017 2016 Current: Federal $ 36,862 $ 33,799 $ 24,394 State 3,791 2,458 2,166 Total current expense 40,653 36,257 26,560 Deferred: Federal 3,791 44,009 5,439 State 673 380 541 Total deferred expense 4,464 44,389 5,980 Total income tax expense $ 45,117 $ 80,646 $ 32,540
Reconciliation of Total Income Tax Expense	Income tax expense as shown in the consolidated statements of income differed from the amounts computed by applying the U.S. federal income statutory rate to income before income taxes. The statutory rate is 21% for the year ended December 31, 2018 and 35% for the years ended December 31, 2017 and 2016. A reconciliation of the differences is presented below: For the Year Ended December 31, (In thousands) 2018 2017 2016 Computed income tax expense at statutory rate $ 44,389 $ 64,050 $ 34,410 Effects of tax reform (284 ) $ 19,022 — Tax exempt interest, net (1,609 ) (3,988 ) (2,744 ) BOLI income (717 ) (1,148 ) (1,023 ) State tax expense 3,527 2,279 1,760 Goodwill writeoff on sale of subsidiary assets 2,254 — — One-time bad debt deduction on legacy loan portfolio (5,565 ) — — Other, net 3,122 431 137 Total income tax expense $ 45,117 $ 80,646 $ 32,540
Significant Components of the Company's Deferred Tax Assets and Liabilities	The significant components of the Company’s deferred tax assets and liabilities as of December 31, 2018 and 2017 are as follows: As of December 31, (In thousands) 2018 2017 Deferred income tax assets: Allowance for credit losses $ 20,256 $ 18,464 Deferred compensation 3,338 3,440 Accrued compensation 3,630 2,506 Net operating loss carryforwards 8,893 9,859 Alternative minimum tax credit carryover 978 978 Unrealized loss on securities, net 7,910 1,271 Unrealized loss on derivative instruments 5,496 4,912 Other 3,588 6,198 Total deferred income tax assets 54,089 47,628 Deferred income tax liabilities: Difference in book and tax basis of intangibles 1,573 1,927 Other 6,239 4,213 Excess of book basis in assets acquired and tax liabilities assumed over book carrying value: Intangibles 9,473 7,122 Other 3,580 3,592 Total deferred income tax liabilities 20,865 16,854 Net deferred income tax asset $ 33,224 $ 30,774
Reconciliation of the Beginning and Ending Amount of Unrecognized Income Tax Benefits	A reconciliation of the beginning and ending amount of unrecognized income tax benefits is as follows (unrecognized state income tax benefits are not adjusted for the federal income tax impact): For the Year Ended December 31, (In thousands) 2018 2017 2016 Unrecognized income tax benefits $ 894 $ 944 $ — Increases for tax positions related to: Prior years — 9 422 Current year 479 394 522 Decreases for tax positions related to: Prior years (101 ) (453 ) — Current year — — — Settlement with taxing authorities — — — Expiration of applicable statutes of limitations — — — Unrecognized income tax benefits $ 1,272 $ 894 $ 944

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Reconciliation of Basic and Diluted Net Income Per Common Share	The following table displays a reconciliation of the information used in calculating basic and diluted net income per common share for each of the years in the period ended December 31, 2018. Year Ended December 31, (In thousands, except per share data) 2018 2017 2016 Net income per consolidated statements of income $ 166,261 $ 102,353 $ 65,774 Net income allocated to participating securities (197 ) — — Net income allocated to common stock $ 166,064 $ 102,353 $ 65,774 Weighted average common shares outstanding (Basic) 83,562,109 81,072,945 75,000,000 Weighted average dilutive restricted stock units 813,180 532,070 294,600 Weighted average common shares outstanding (Diluted) 84,375,289 81,605,015 75,294,600 Earnings per common share (Basic) $ 1.99 $ 1.26 $ 0.88 Earnings per common share (Diluted) $ 1.97 $ 1.25 $ 0.87

Employee Benefits (Tables)

Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined benefit pension plan funded	The following table sets forth the defined benefit pension plan’s funded status as of December 31, 2018 and 2017 and amounts recognized in the Company’s consolidated financial statements for each of the years in the period ended December 31, 2018: (In thousands) 2018 2017 Change in benefit obligation: Benefit obligation at beginning of period $ 5,909 $ 5,785 Service cost 100 100 Interest cost 165 192 Actuarial loss (gain) (797 ) 224 Administrative expenses paid (36 ) (40 ) Benefits paid (225 ) (77 ) Settlements — (275 ) Benefit obligation at end of year 5,116 5,909 Change in plan assets: Fair value of plan assets at beginning of period 6,130 4,689 Return on plan assets (213 ) 533 Employer contributions — 1,300 Administrative expenses paid (36 ) (40 ) Benefits paid (225 ) (77 ) Settlements — (275 ) Fair value of plan assets at end of year 5,656 6,130 Funded status $ 540 $ 221 (In thousands) 2018 2017 2016 Components of net periodic benefit cost: Service cost $ 100 $ 100 $ 100 Interest cost 165 192 221 Expected return on plan assets (319 ) (261 ) (234 ) Net loss amortization — 65 53 Cost of settlements — 45 156 Net periodic benefit cost $ (54 ) $ 141 $ 296 Amount recognized in accumulated other comprehensive income: Amortization of net actuarial loss $ — $ 65 $ 53 Net actuarial gain (loss) 265 48 (226 ) Adjustment for settlement — 45 156 Gains (losses) on pension liability 265 158 (17 ) Tax effect (62 ) (37 ) 4 Net unrealized gains (losses) on pension liability $ 203 $ 121 $ (13 )
Assumptions Used to Determine Benefit Obligations and Net Periodic Pension Cost	2018 2017 2016 Weighted average assumptions used to determine benefit obligations and net periodic pension cost at December 31: Discount rate 3.92 % 3.21 % 3.52 % Compensation increase rate N/A N/A N/A Census date 1/1/2019 1/1/2018 1/1/2017 Expected return on plan assets 5.50 % 5.50 % 5.50 %
Schedule of Defined Benefit Pension Plan Fair Values and Weighted-Average Asset Allocations by Asset Category	The Company’s defined benefit pension plan fair values and weighted-average asset allocations at December 31, 2018 and 2017, by asset category, were as follows: 2018 2017 (In thousands) Fair Value of Plan Assets Asset Allocations Fair Value of Plan Assets Asset Allocations Asset Category: Equity securities $ 2,262 40 % $ 2,382 39 % Fixed income securities 3,311 59 3,342 55 Cash and cash equivalents 83 1 406 6 Total $ 5,656 100 % $ 6,130 100 %
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Schedule of Expected Benefit Payments	Retiree benefit payments, which reflect expected future service, are anticipated to be paid as follows: (In thousands) Amount 2019 $ 1,173 2020 1,262 2021 298 2022 249 2023 497 2024-2028 1,301 Total $ 4,780
Other Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Schedule of Expected Benefit Payments	Projected benefit payments under these plans are anticipated to be paid as follows: Year Amount (In thousands) 2019 $ 376 2020 376 2021 384 2022 384 2023 385 2024-2028 1,903 Total $ 3,808

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2018
Banking And Thrift [Abstract]
Schedule of Actual Capital Amounts and Ratios	The actual capital amounts and ratios for the Company and the bank as of December 31, 2018 and 2017 are presented in the following tables and as shown, are above the thresholds necessary to be considered “well-capitalized”. Consolidated Company Bank (In thousands) Amount Ratio Amount Ratio December 31, 2018 Actual: Tier 1 leverage $ 1,209,407 10.1 % $ 1,327,974 11.1 % Common equity tier 1 capital 1,172,454 9.8 1,277,974 10.7 Tier 1 risk-based capital 1,209,407 10.1 1,327,974 11.1 Total risk-based capital 1,403,311 11.8 1,447,719 12.1 Minimum requirement: Tier 1 leverage 479,940 4.0 % 479,667 4.0 % Common equity tier 1 capital 536,930 4.5 536,285 4.5 Tier 1 risk-based capital 715,907 6.0 715,047 6.0 Total risk-based capital 954,542 8.0 953,396 8.0 Well capitalized requirement: Tier 1 leverage N/A N/A 599,584 5.0 % Common equity tier 1 capital N/A N/A 774,634 6.5 Tier 1 risk-based capital 715,907 6.0 953,396 8.0 Total risk-based capital 1,193,178 10.0 1,191,745 10.0 Consolidated Company Bank (In thousands) Amount Amount Amount Ratio December 31, 2017 Actual: Tier 1 leverage $ 1,096,438 10.7 % $ 1,198,234 11.7 % Common equity tier 1 1,058,888 10.6 1,149,181 11.5 Tier 1 risk-based capital 1,096,438 10.9 1,198,234 12.0 Total risk-based capital 1,283,561 12.8 1,311,376 13.1 Minimum requirement: Tier 1 leverage 410,770 4.0 % 410,743 4.0 % Common equity tier 1 450,951 4.5 450,874 4.5 Tier 1 risk-based capital 601,269 6.0 601,165 6.0 Total risk-based capital 801,691 8.0 801,553 8.0 Well capitalized requirement: Tier 1 leverage N/A N/A 513,429 5.0 % Common equity tier 1 N/A N/A 651,262 6.5 Tier 1 risk-based capital 601,269 6.0 801,553 8.0 Total risk-based capital 1,002,114 10.0 1,001,941 10.0

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Summary of Commitments and Contingent Liabilities	A summary of commitments and contingent liabilities is as follows: As of December 31, (In thousands) 2018 2017 Commitments to extend credit $ 4,078,708 $ 3,270,097 Commitments to grant loans 103,570 522,967 Standby letters of credit 141,214 101,718 Performance letters of credit 21,026 17,638 Commercial letters of credit 11,262 11,790

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2018
Supplemental Cash Flow Elements [Abstract]
Summary of Supplemental Cash Flow Information	For the Year Ended December 31, (In thousands) 2018 2017 2016 Cash paid during the year for: Interest $ 120,823 $ 69,289 $ 55,086 Income taxes, net of refunds 40,754 33,268 23,025 Non-cash investing activities (at fair value): Acquisition of real estate in settlement of loans 3,207 7,023 13,494 Transfers of loans to loans held for sale 36,627 16,206 318,868 Acquisition of net profits interest in settlement of loans — — 19,104

Disclosure About Fair Values _2

Disclosure About Fair Values of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis	The table below presents the Company’s assets and liabilities measured at fair value on a recurring basis categorized by the level of inputs used in the valuation of each asset and liability at December 31, 2018 and 2017: (In thousands) Carrying Value (Level 1) (Level 2) (Level 3) December 31, 2018 Assets Investment securities available-for-sale $ 1,187,252 $ — $ 1,187,252 $ — Equity securities with readily determinable fair values not held for trading 5,840 5,840 — — Derivative assets 11,136 — 11,136 — Net profits interests 5,779 — — 5,779 Investments in limited partnerships 11,191 — — 11,191 Total recurring basis measured assets $ 1,221,198 $ 5,840 $ 1,198,388 $ 16,970 Liabilities Derivative liabilities $ 32,350 $ — $ 32,350 $ — Total recurring basis measured liabilities $ 32,350 $ — $ 32,350 $ — (In thousands) Carrying Value (Level 1) (Level 2) (Level 3) December 31, 2017 Assets Investment securities available-for-sale $ 1,257,063 $ — $ 1,257,063 $ — Equity securities with readily determinable fair values not held for trading 5,885 5,885 — — Derivative assets 3,958 — 3,958 — Net profits interests 15,833 — — 15,833 Total recurring basis measured assets $ 1,282,739 $ 5,885 $ 1,261,021 $ 15,833 Liabilities Derivative liabilities $ 25,280 $ — $ 25,280 $ — Total recurring basis measured liabilities $ 25,280 $ — $ 25,280 $ —
Summary of Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis	For the Year Ended December 31, 2018 2017 2018 2017 (In thousands) Net Profits Interests Investments in Limited Partnerships Beginning Balance $ 15,833 $ 19,425 $ — $ — Transfers in due to adoption of ASU 2016-01 — — 5,129 — Adjustment recorded in retained earnings due to adoption of ASU 2016-01 — — 1,201 — Sales proceeds (5,308 ) — — — Net (losses) gains included in earnings (3,177 ) (2,442 ) 2,457 — Contributions paid — — 3,807 — Distributions received (1,569 ) (1,150 ) (1,403 ) — Ending Balance at December 31, 2018 $ 5,779 $ 15,833 $ 11,191 $ — Net unrealized (losses) gains included in earnings relating to assets held at the end of the period $ (2,818 ) $ (2,442 ) $ 2,457 $ —
Summary of Assets Recorded at Fair Value on a Nonrecurring Basis	From time to time, the Company may be required to measure certain other financial assets at fair value on a nonrecurring basis in accordance with GAAP. These adjustments to fair value usually result from the application of lower of cost or fair value accounting or write-downs of individual assets. For assets measured at fair value on a nonrecurring basis which were still held on the balance sheets at December 31, 2018 and 2017, the following tables provide the level of valuation assumptions used to determine each adjustment and the related carrying value: (In thousands) Carrying Value (Level 1) (Level 2) (Level 3) December 31, 2018 Loans held for sale $ 59,461 — $ 59,461 $ — Impaired loans, net of specific allowance 71,741 — — 71,741 Other real estate 2,406 — — 2,406 Total assets measured on a nonrecurring basis $ 133,608 $ — $ 59,461 $ 74,147 (In thousands) Carrying Value (Level 1) (Level 2) (Level 3) December 31, 2017 Loans held for sale $ 61,359 — $ 61,359 $ — Impaired loans, net of specific allowance 65,088 — — 65,088 Other real estate 7,605 — — 7,605 Total assets measured on a nonrecurring basis $ 134,052 $ — $ 61,359 $ 72,693
Summary of Significant Unobservable Inputs Used in Level 3 Fair Value Measurements for Financial Assets Measured at Fair Value on a Nonrecurring Basis	Significant unobservable inputs used in Level 3 fair value measurements for financial assets measured at fair value on a nonrecurring basis are summarized below: Quantitative Information about Level 3 Fair Value Measurements (In thousands) Carrying Value Valuation Methods Unobservable Inputs Range December 31, 2018 Impaired loans, net of specific allowance $ 71,741 Appraised value, as adjusted Discount to fair value 0% - 20% Discounted cash flow Net recoverable oil and gas reserves and forward-looking commodity prices. Discount rate - 10% 0 - 10% Discounted cash flow Discount rates - 2.9% to 8.7% 0% - 20% (1) Enterprise value Exit multiples 0 - 15% (1) Estimated closing costs 10% Other real estate 2,406 Appraised value, as adjusted Discount to fair value 0% - 20% Estimated closing costs 10% (1) - Represents difference of unpaid balance to fair value. Quantitative Information about Level 3 Fair Value Measurements (In thousands) Carrying Value Valuation Methods Unobservable Inputs Range December 31, 2017 Impaired loans, net of specific allowance $ 65,088 Appraised value, as adjusted Discount to fair value 0% - 50% Discounted cash flow Net recoverable oil and gas reserves and forward-looking commodity prices. Discount rate - 9% 0% - 29% (1) Discounted cash flow Discount rates - 3.6% to 8.0% 0% - 1% (1) Estimated closing costs 10% Other real estate 7,605 Appraised value, as adjusted Discount of fair value 0%-20% Estimated closing costs 10% (1) - Represents fair value as a percent of the unpaid principal balance.
Summary of Estimated Fair Values of Financial Instruments	The estimated fair values of the Company’s financial instruments are as follows: December 31, 2018 (In thousands) Carrying Amount Fair Value Level 1 Level 2 Level 3 Financial Assets: Cash and due from banks $ 237,342 $ 237,342 $ 237,342 $ — $ — Interest-bearing deposits in other banks 523,436 523,436 523,436 — — Federal funds sold 18,502 18,502 18,502 — — Investment securities available-for-sale 1,187,252 1,187,252 — 1,187,252 — Equity securities with readily determinable fair values not held for trading 5,840 5,840 5,840 — — Loans held for sale 59,461 59,461 — 59,461 — Net loans 9,959,545 9,735,130 — — 9,735,130 Derivative assets 11,136 11,136 — 11,136 — Net profits interests 5,779 5,779 — — 5,779 Investments in limited partnerships 36,917 36,917 — — 36,917 Financial Liabilities: Deposits 10,708,689 10,700,350 — 10,700,350 — Advances from FHLB 150,000 150,000 — 150,000 — Securities sold under agreements to repurchase 1,106 1,106 — 1,106 — Senior debt 184,801 194,762 — 194,762 — Subordinated debt 98,910 103,008 — 103,008 — Junior subordinated debentures 36,953 46,946 — 46,946 — Derivative liabilities 32,350 32,350 — 32,350 — December 31, 2017 (In thousands) Carrying Amount Fair Value Level 1 Level 2 Level 3 Financial Assets: Cash and due from banks $ 238,707 $ 238,707 $ 238,707 $ — $ — Interest-bearing deposits in other banks 482,568 482,568 482,568 — — Federal funds sold 9,536 9,536 9,536 — — Securities available-for-sale 1,257,063 1,257,063 — 1,257,063 — Securities held-to-maturity 290 311 — 311 — Equity securities with readily determinable fair values not held for trading 5,885 5,885 5,885 — — Loans held for sale 61,359 61,359 — 61,359 — Net loans 8,165,851 8,134,903 — — 8,134,903 Derivative assets 3,958 3,958 — 3,958 — Net profits interests 15,833 15,833 — — 15,833 Financial Liabilities: Deposits 9,011,515 9,006,890 — 9,006,890 — Advances from FHLB 150,000 150,000 — 150,000 — Securities sold under agreements to repurchase 1,026 1,026 — 1,026 — Senior debt 184,629 194,484 — 194,484 — Subordinated debt 98,687 94,724 — 94,724 — Junior subordinated debentures 36,472 49,161 — 49,161 — Derivative liabilities 25,280 25,280 — 25,280 —

Variable Interest Entities an_2

Variable Interest Entities and Other Investments (Tables)	12 Months Ended
	Dec. 31, 2018
Variable Interest Entities And Other Investments [Abstract]
Summary of Investment in Limited Partnerships Subsequent to Adoption of ASU 2016-01	The following table presents a summary of the Company’s investments in limited partnerships subsequent to the adoption of ASU 2016-01 as of December 31, 2018: (In thousands) As of December 31, 2018 Affordable housing projects (amortized cost) $ 7,803 Limited partnerships accounted for under the fair value practical expedient of NAV 11,191 Limited partnerships without readily determinable fair values that do not qualify for the practical expedient of NAV accounted for under the cost method 8,714 Limited partnerships required to be accounted for under the equity method 9,209 Total investments in limited partnerships $ 36,917
Summary of Carrying Amount of Equity Investments Measured Under Measurement Alternative from Observable Transactions	The carrying amount of equity investments measured under the measurement alternative from observable transactions are as follows: (In thousands) Year Ended December 31, 2018 Carrying value, December 31, 2017 $ 8,856 Distributions (1,109 ) Contributions 967 Carrying value, December 31, 2018 $ 8,714

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Summary of Operating Results of Segments	The following tables present the operating results of the segments as of and for the years ended December 31, 2018, 2017 and 2016: For the Year Ended December 31, 2018 (In thousands) Banking Financial Services Corporate Consolidated Net interest income (expense) $ 407,674 $ (2,307 ) $ (17,626 ) $ 387,741 Provision for credit losses 12,700 — — 12,700 Noninterest income 47,316 46,805 517 94,638 Noninterest expense 215,574 35,679 7,048 258,301 Income tax expense (benefit) 52,464 3,979 (11,326 ) 45,117 Net income (loss) $ 174,252 $ 4,840 $ (12,831 ) $ 166,261 Total assets $ 12,622,287 $ 94,618 $ 13,380 $ 12,730,285 For the Year Ended December 31, 2017 (In thousands) Banking Financial Services Corporate Consolidated Net interest income (expense) $ 344,987 $ (1,347 ) $ (17,424 ) $ 326,216 Provision for credit losses 9,735 — — 9,735 Noninterest income 51,286 47,956 632 99,874 Noninterest expense 194,212 36,178 2,966 233,356 Income tax expense (benefit) 88,417 2,000 (9,771 ) 80,646 Net income (loss) $ 103,909 $ 8,431 $ (9,987 ) $ 102,353 Total assets $ 10,854,206 $ 90,639 $ 4,081 $ 10,948,926 For the Year Ended December 31, 2016 (In thousands) Banking Financial Services Corporate Consolidated Net interest income (expense) $ 297,701 $ (201 ) $ (18,061 ) $ 279,439 Provision for credit losses 49,348 — — 49,348 Noninterest income 45,499 42,727 177 88,403 Noninterest expense 186,874 32,334 972 220,180 Income tax expense (benefit) 37,442 3,567 (8,469 ) 32,540 Net income (loss) $ 69,536 $ 6,625 $ (10,387 ) $ 65,774

Equity-based Compensation (Tabl

Equity-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Activity Related to Restricted Stock Unit Awards	For the Year Ended December 31, 2018 2018 2017 2016 Number of Shares Fair Value per Unit at Award Date Number of Shares Fair Value per Unit at Award Date Number of Shares Fair Value per Unit at Award Date Non-vested at beginning of period 672,750 $ 5.14 672,750 $ 5.14 258,375 $ 13.43 Units deemed improbable to vest — — — — (258,375 ) 13.43 Expired during the period (672,750 ) 5.14 — — — — Amended grants — — — — 395,250 5.14 Forfeited during the period (707 ) 26.50 — — — — Granted during the period 276,451 26.49 — — 277,500 5.14 Non-vested at end of period 275,744 $ 26.49 672,750 $ 5.14 672,750 $ 5.14

Condensed Financial Informati_2

Condensed Financial Information of Cadence Bancorporation (Parent Only) (Tables)	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information Of Parent Company Only Disclosure Abstract
Schedule Of Condensed Financial Statements	Condensed Balance Sheets December 31, 2018 and 2017 (In thousands) 2018 2017 ASSETS Cash and due from banks $ 985 $ 494 Interest-bearing deposits with banks 114,871 150,587 Investment in consolidated bank subsidiary 1,593,469 1,488,223 Investment in consolidated nonbank subsidiary 16,787 16,008 Other assets 15,126 3,587 Total Assets $ 1,741,238 $ 1,658,899 LIABILITIES AND SHAREHOLDER’S EQUITY Liabilities: Interest payable $ 818 $ 813 Senior debt 184,801 184,629 Subordinated debt 74,158 73,982 Junior subordinated debentures 36,953 36,472 Other liabilities 6,234 3,947 Total liabilities 302,964 299,843 Shareholder’s Equity: Common stock 836 836 Additional paid-in capital 1,041,000 1,037,040 Treasury stock (22,010 ) — Retained earnings 461,360 340,213 Accumulated other comprehensive loss (42,912 ) (19,033 ) Total Shareholders' Equity 1,438,274 1,359,056 Total Liabilities and Shareholders' Equity $ 1,741,238 $ 1,658,899 Condensed Statements of Income For the Years Ended December 31, 2018, 2017 and 2016 (In thousands) 2018 2017 2016 INCOME Dividends from bank subsidiary $ 59,494 $ 11,000 $ 13,500 Interest income 73 65 25 Other income 516 632 176 Total income 60,083 11,697 13,701 EXPENSES Interest expense 17,626 17,424 18,060 Other expenses 7,048 3,305 2,092 Total expenses 24,674 20,729 20,152 Income (loss) before income taxes and equity in undistributed income of subsidiaries 35,409 (9,032 ) (6,451 ) Equity in undistributed income of subsidiaries 125,727 103,390 64,424 Net income before income taxes 161,136 94,358 57,973 Income tax benefit (5,125 ) (7,995 ) (7,801 ) Net income $ 166,261 $ 102,353 $ 65,774 Condensed Statements of Cash Flows For the Years Ended December 31, 2018, 2017 and 2016 (In thousands) 2018 2017 2016 CASH FLOWS FROM OPERATING ACTIVITIES Net income $ 166,261 $ 102,353 $ 65,774 Adjustments to reconcile net income to net cash provided in operations: Deferred income tax expense 358 1,084 (1,598 ) Equity in undistributed income of subsidiaries (125,727 ) (103,390 ) (64,424 ) (Increase) decrease in other assets (10,143 ) 3,892 3,043 Increase (decrease) in interest payable 5 3 (102 ) Increase (decrease) in other liabilities 2,151 891 (504 ) Net cash provided by operating activities 32,905 4,833 2,189 CASH FLOWS FROM INVESTING ACTIVITIES Capital contributions to bank subsidiary — (50,000 ) — (Increase) decrease in limited partnership investments (125 ) (63 ) 463 Net cash (used in) provided by investing activities (125 ) (50,063 ) 463 CASH FLOWS FROM FINANCING ACTIVITIES Purchase of senior debt — (9,600 ) (78 ) Proceeds from issuance of common stock — 155,581 — Cash dividends paid on common stock (45,995 ) — — Repurchase of common stock (22,010 ) — — Net cash (used in) provided by financing activities (68,005 ) 145,981 (78 ) Net (decrease) increase in cash and cash equivalents (35,225 ) 100,751 2,574 Cash and cash equivalents at beginning of year 151,081 50,330 47,756 Cash and cash equivalents at end of year $ 115,856 $ 151,081 $ 50,330

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	Activity within the balances in accumulated other comprehensive income (loss) is shown in the following tables for each of the years in the period ended December 31, 2018. (In thousands) Unrealized gains (losses) on securities available for sale Unrealized gains (losses) on defined benefit pension plans Unrealized gains (losses) on derivative instruments designated as cash flow hedges Accumulated other comprehensive gain (loss) Balance, December 31, 2015 $ 5,901 $ (487 ) $ 1,626 $ 7,040 Net change (27,720 ) (13 ) (11,838 ) (39,571 ) Balance, December 31, 2016 (21,819 ) (500 ) (10,212 ) (32,531 ) Period change 21,605 121 (2,982 ) 18,744 Reclassification of amounts within AOCI to retained earnings due to tax reform (See Notes 1 and 11) (1,946 ) (152 ) (3,148 ) (5,246 ) Balance, December 31, 2017 (2,160 ) (531 ) (16,342 ) (19,033 ) Net change (22,119 ) 203 (1,963 ) (23,879 ) Balance, December 31, 2018 $ (24,279 ) $ (328 ) $ (18,305 ) $ (42,912 )

Quarterly Results of Operatio_2

Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Summary of Quarterly Results of Operations	The following is a summary of the quarterly results of operations, for the years ended December 31, 2018 and 2017: Three Months Ended, (In thousands) December 31, 2018 September 30, 2018 June 30, 2018 March 31, 2018 Interest income $ 143,857 $ 131,753 $ 123,963 $ 113,093 Interest expense 40,711 33,653 28,579 21,982 Net interest income 103,146 98,100 95,384 91,111 Provision for credit losses 8,422 (1,365 ) 1,263 4,380 Noninterest income (1) 21,007 23,976 24,672 24,983 Noninterest expense 72,696 61,231 62,435 61,939 Income before income taxes 43,035 62,210 56,358 49,775 Provision for income taxes 10,709 15,074 8,384 10,950 Net income $ 32,326 $ 47,136 $ 47,974 $ 38,825 Earnings per common share (Basic) $ 0.39 $ 0.56 $ 0.57 $ 0.46 Earnings per common share (Diluted) 0.39 0.56 0.57 0.46 Three Months Ended, (In thousands) December 31, 2017 September 30, 2017 June 30, 2017 March 31, 2017 Interest income $ 108,370 $ 99,503 $ 99,375 $ 89,619 Interest expense 20,459 18,340 16,991 14,861 Net interest income 87,911 81,163 82,384 74,758 Provision for credit losses (4,475 ) 1,723 6,701 5,786 Noninterest income (2) 25,656 27,124 22,989 24,105 Noninterest expense 66,371 56,530 56,134 54,321 Income before income taxes 51,671 50,034 42,538 38,756 Provision for income taxes 36,980 17,457 13,570 12,639 Net income $ 14,691 $ 32,577 $ 28,968 $ 26,117 Earnings per common share (Basic) $ 0.18 $ 0.39 $ 0.35 $ 0.35 Earnings per common share (Diluted) 0.17 0.39 0.35 0.35 (1 ) (2) Includes net securities gains (losses) of $16 thousand, $1 thousand, $(244) thousand and $81 thousand during the fourth, third, second and first quarters of 2017, respectively.

Summary of Accounting Policie_3

Summary of Accounting Policies - Additional Information (Details) - USD ($)	Jun. 01, 2018	May 31, 2018	Jan. 01, 2018	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2019	Oct. 31, 2018
Significant Of Accounting Policies [Line Items]
Investment securities held-to-maturity (estimated fair value of $311 at December 31, 2017)				$ 0		$ 0	$ 290,000
Trading Securities				0		0	0
Reserve for unfunded commitments, Amount				600,000		600,000	800,000
Loan in process of foreclosure				3,800,000		3,800,000	4,400,000
Residential real estate properties held				2,406,000		2,406,000	7,605,000
Goodwill impairment						0	0	$ 0
Expense under cash based long term incentive plan						$ 6,000,000	7,300,000	4,400,000
ASU 2016-01
Significant Of Accounting Policies [Line Items]
Adjustment to retained earnings			$ 1,000,000
ASU 2016-02 | Subsequent Event
Significant Of Accounting Policies [Line Items]
Right-of-use asset									$ 65,900,000
2018 Employee Stock Purchase Plan | Common Class A
Significant Of Accounting Policies [Line Items]
Percentage of discount on fair market value of common stock	15.00%					15.00%
Executives And Senior Officers
Significant Of Accounting Policies [Line Items]
Percentage of base deferred compensation						25.00%
Percentage of incentive compensation						100.00%
Employee Contribution						$ 0	0	$ 0
401 K Plan
Significant Of Accounting Policies [Line Items]
Retained earning contribution						100.00%
Employer match 100% up to 3% Of Employee Compensation | 401 K Plan
Significant Of Accounting Policies [Line Items]
Defined contribution plan percentage						100.00%
Employer match 50% Between 3% to 5% Of Employee Compensation | 401 K Plan
Significant Of Accounting Policies [Line Items]
Defined contribution plan percentage						50.00%
Employee contribution percentage						3.00%
Maximum
Significant Of Accounting Policies [Line Items]
Share repurchase program authorized amount				81,000,000		$ 81,000,000				$ 50,000,000
Federal funds sold periods						7 days
Maximum | Employer match 100% up to 3% Of Employee Compensation | 401 K Plan
Significant Of Accounting Policies [Line Items]
Employee contribution percentage						3.00%
Minimum
Significant Of Accounting Policies [Line Items]
Federal funds sold periods						1 day
Variable Interest Entity, Not Primary Beneficiary
Significant Of Accounting Policies [Line Items]
Proceeds from sale of previously owned net profit interest				5,300,000
Net Profits interest				5,800,000		$ 5,800,000	15,800,000
OREO
Significant Of Accounting Policies [Line Items]
Residential real estate properties held				$ 900,000		$ 900,000	$ 2,700,000
Unrelated Third Party | Town & Country Insurance Agency, Inc.
Significant Of Accounting Policies [Line Items]
Sale of net assets		$ 11,100,000
Unrelated Third Party | Town & Country Insurance Agency, Inc. | Noninterest Income
Significant Of Accounting Policies [Line Items]
Sale of assets, pre-tax gain					$ 4,900,000
Unrelated Third Party | Town & Country Insurance Agency, Inc. | Noninterest expenses
Significant Of Accounting Policies [Line Items]
Sale related expenses					$ 1,100,000
Unrelated Third Party | Town & Country Insurance Agency, Inc. | Goodwill and Intangible Assets
Significant Of Accounting Policies [Line Items]
Sale of net assets		$ 10,900,000

Summary of Accounting Policie_4

Summary of Accounting Policies - Summary of Loans Held for Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Accounting Policies [Line Items]
Loans held for sale	$ 59,461	$ 61,359
Residential Mortgage
Schedule Of Accounting Policies [Line Items]
Loans held for sale	17,004	5,834
Commercial Loans
Schedule Of Accounting Policies [Line Items]
Loans held for sale	$ 42,457	$ 55,525

Subsequent Events - Additional

Subsequent Events - Additional Information (Details)	Jan. 22, 2019$ / shares	Jan. 01, 2019USD ($)$ / sharesshares	Jul. 21, 2015shares	Feb. 28, 2019USD ($)	Nov. 30, 2016shares	Feb. 28, 2019USD ($)shares	Dec. 31, 2019$ / shares	Dec. 31, 2018USD ($)Bank$ / sharesshares	Dec. 31, 2016shares	Oct. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Subsequent Event [Line Items]
Cash dividends declared year to date, per common share | $ / shares								$ 0.55
Derivative, notional amount								$ 2,696,100,000			$ 2,350,759,000
Maximum
Subsequent Event [Line Items]
Share repurchase program authorized amount								$ 81,000,000		$ 50,000,000
Share repurchase program authorized number of shares | shares								4,300,000
Scenario Plan | Common Stock
Subsequent Event [Line Items]
Cash dividends declared year to date, per common share | $ / shares							$ 0.70
Restricted Stock Units
Subsequent Event [Line Items]
Restricted stock granted | shares			258,375		395,250			276,451	277,500
Perfomrnace goals duration, Minimum								3 years
Perfomrnace goals duration, Maximum								4 years
State Bank Financial Corporation
Subsequent Event [Line Items]
Acquisition costs related to transaction								$ 3,000,000
Business combination total assets reported								4,900,000,000
Business combination total loans reported								3,400,000,000
Business combination total deposits reported								$ 4,100,000
GEORGIA | State Bank Financial Corporation
Subsequent Event [Line Items]
Number of banking locations | Bank								32
Subsequent Event
Subsequent Event [Line Items]
Vesting period		3 years
Options granted | shares		1,600,000
Weighted average price, options | $ / shares		$ 20.43
Share repurchased, share | shares						1,800,000
Share repurchased, value						$ 34,500,000
Derivative, notional amount				$ 4,000,000,000		4,000,000,000
Derrivative contract term				5 years
Derivative, purchased option price				$ 127,800,000		$ 127,800,000
Subsequent Event | Purchased | Interest Rate Caps
Subsequent Event [Line Items]
Derrivative cap interest rate				4.70%		4.70%
Subsequent Event | Purchased | Interest Rate Floors
Subsequent Event [Line Items]
Derrivative floor interest rate				3.00%		3.00%
Subsequent Event | Sold | Interest Rate Caps
Subsequent Event [Line Items]
Derrivative cap interest rate				3.50%		3.50%
Subsequent Event | Sold | Interest Rate Floors
Subsequent Event [Line Items]
Derrivative floor interest rate				0.00%		0.00%
Subsequent Event | Common Stock
Subsequent Event [Line Items]
Cash dividends declared year to date, per common share | $ / shares	$ 0.175
Dividend paid date	Mar. 15, 2019
Dividend record date	Mar. 1, 2019
Dividend declared date	Jan. 22, 2019
Subsequent Event | Restricted Stock Units
Subsequent Event [Line Items]
Restricted stock granted | shares		657,998
Vesting period		3 years
Subsequent Event | State Bank Financial Corporation
Subsequent Event [Line Items]
Purchase price consideration		$ 826,000,000
Subsequent Event | State Bank Financial Corporation | Common Class A
Subsequent Event [Line Items]
Common stock in exchange for outstanding common shares | shares		1.271

Securities - Summary of Amortiz

Securities - Summary of Amortized Cost and Estimated Fair Value of Securities Available-for-Sale and Securities Held-to-Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Securities available-for-sale, Amortized Cost	$ 1,221,511	$ 1,262,688
Securities available-for-sale, Gross Unrealized Gains	1,658	10,397
Securities available-for-sale, Gross Unrealized Losses	35,917	16,022
Securities available-for-sale, Estimated Fair Value	1,187,252	1,257,063
Securities held-to-maturity, Amortized Cost	0	290
Securities held-to-maturity, Estimated Fair Value		311
U.S. Treasury Securities
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Securities available-for-sale, Amortized Cost	100,413	100,575
Securities available-for-sale, Gross Unrealized Losses	3,628	3,731
Securities available-for-sale, Estimated Fair Value	96,785	96,844
Obligations of U.S. Government Agencies
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Securities available-for-sale, Amortized Cost	60,975	80,552
Securities available-for-sale, Gross Unrealized Gains	316	738
Securities available-for-sale, Gross Unrealized Losses	284	66
Securities available-for-sale, Estimated Fair Value	61,007	81,224
Residential Pass-through | Guaranteed by GNMA
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Securities available-for-sale, Amortized Cost	85,052	106,461
Securities available-for-sale, Gross Unrealized Gains	146	676
Securities available-for-sale, Gross Unrealized Losses	2,093	1,110
Securities available-for-sale, Estimated Fair Value	83,105	106,027
Residential Pass-through | Issued by FNMA and FHLMC
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Securities available-for-sale, Amortized Cost	594,874	431,409
Securities available-for-sale, Gross Unrealized Gains	694	1,284
Securities available-for-sale, Gross Unrealized Losses	10,367	2,271
Securities available-for-sale, Estimated Fair Value	585,201	430,422
Other Residential Mortgage-Backed Securities
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Securities available-for-sale, Amortized Cost	36,339	47,379
Securities available-for-sale, Gross Unrealized Gains	8	97
Securities available-for-sale, Gross Unrealized Losses	1,178	1,084
Securities available-for-sale, Estimated Fair Value	35,169	46,392
Commercial Mortgage-Backed Securities
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Securities available-for-sale, Amortized Cost	114,383	76,201
Securities available-for-sale, Gross Unrealized Gains	287	63
Securities available-for-sale, Gross Unrealized Losses	5,255	4,069
Securities available-for-sale, Estimated Fair Value	109,415	72,195
Total MBS
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Securities available-for-sale, Amortized Cost	830,648	661,450
Securities available-for-sale, Gross Unrealized Gains	1,135	2,120
Securities available-for-sale, Gross Unrealized Losses	18,893	8,534
Securities available-for-sale, Estimated Fair Value	812,890	655,036
Obligations of States and Municipal Subdivisions
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Securities available-for-sale, Amortized Cost	229,475	420,111
Securities available-for-sale, Gross Unrealized Gains	207	7,539
Securities available-for-sale, Gross Unrealized Losses	13,112	3,691
Securities available-for-sale, Estimated Fair Value	$ 216,570	423,959
Securities held-to-maturity, Amortized Cost		290
Securities held-to-maturity, Gross Unrealized Gains		21
Securities held-to-maturity, Estimated Fair Value		$ 311

Securities - Schedule of Contra

Securities - Schedule of Contractual Maturities of Securities Available-for-Sale and Debt Securities Held-to-Maturity (Details) $ in Thousands	Dec. 31, 2018USD ($)
Investments Debt And Equity Securities [Abstract]
Available-for-Sale, Due after one year through five years, Amortized Cost	$ 107,283
Available-for-Sale, Due after five years through ten years, Amortized Cost	53,314
Available-for-Sale, Due after ten years, Amortized Cost	230,266
Available-for-Sale, Mortgage-backed securities, Amortized Cost	830,648
Available-for-Sale, Total, Amortized Cost	1,221,511
Available-for-Sale, Due after one year through five years, Estimated Fair Value	103,638
Available-for-Sale, Due after five years through ten years, Estimated Fair Value	53,568
Available-for-Sale, Due after ten years, Estimated Fair Value	217,156
Available-for-Sale, Mortgage-backed securities, Estimated Fair Value	812,890
Available-for-Sale, Total, Estimated Fair Value	$ 1,187,252

Securities - Additional Informa

Securities - Additional Information (Details)	3 Months Ended	12 Months Ended
	Jun. 30, 2018USD ($)	Dec. 31, 2018USD ($)Security	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Investments Debt And Equity Securities [Abstract]
Other-than-temporary impairment charges		$ 0	$ 0	$ 0
Carrying value of securities pledged		$ 711,200,000	$ 507,300,000
Percentage of fair value of securities in investment portfolio reflect unrealized loss		84.00%	58.00%
Number of securities in a loss position for more than twelve months | Security		117
Number of securities in a loss position for less than twelve months | Security		100
Proceeds from sales of securities available-for-sale	$ 187,800,000	$ 268,799,000	$ 161,401,000	$ 538,960,000
Concentration of tax free municipal securities, percentage	35.00%
Target concentration of tax free municipal securities, percentage	25.00%

Securities - Summary of Proceed

Securities - Summary of Proceeds from Sales, Gross Gains, and Gross Losses on Sales of Securities Available for Sale (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investments Debt And Equity Securities [Abstract]
Gross realized gains									$ 816	$ 167	$ 4,172
Gross realized losses									(2,669)	(313)	(436)
Realized (losses) gains on sale of securities available for sale, net	$ (54)	$ 2	$ (1,800)	$ 12	$ 16	$ 1	$ (244)	$ 81	(1,853)	(146)	3,736
Proceeds from sales of securities available-for-sale			$ 187,800						$ 268,799	$ 161,401	$ 538,960

Securities - Schedule of Securi

Securities - Schedule of Securities Classified as Available-for-Sale with Gross Unrealized Losses Aggregated by Category and Length of Time (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Available For Sale Securities [Line Items]
Losses less than 12 Months, Estimated Fair Value	$ 360,275	$ 310,452
Losses less than 12 Months, Gross Unrealized Losses	5,548	1,521
Losses more than 12 Months, Estimated Fair Value	638,003	418,361
Losses more than 12 Months, Gross Unrealized Losses	30,369	14,501
U.S. Treasury Securities
Schedule Of Available For Sale Securities [Line Items]
Losses more than 12 Months, Estimated Fair Value	96,785	96,844
Losses more than 12 Months, Gross Unrealized Losses	3,628	3,731
Obligations of U.S. Government Agencies
Schedule Of Available For Sale Securities [Line Items]
Losses less than 12 Months, Estimated Fair Value	25,978	1,577
Losses less than 12 Months, Gross Unrealized Losses	183	9
Losses more than 12 Months, Estimated Fair Value	10,152	14,323
Losses more than 12 Months, Gross Unrealized Losses	101	57
MBS
Schedule Of Available For Sale Securities [Line Items]
Losses less than 12 Months, Estimated Fair Value	259,794	306,274
Losses less than 12 Months, Gross Unrealized Losses	2,864	1,490
Losses more than 12 Months, Estimated Fair Value	405,974	172,324
Losses more than 12 Months, Gross Unrealized Losses	16,029	7,044
Obligations of States and Municipal Subdivisions
Schedule Of Available For Sale Securities [Line Items]
Losses less than 12 Months, Estimated Fair Value	74,503	2,601
Losses less than 12 Months, Gross Unrealized Losses	2,501	22
Losses more than 12 Months, Estimated Fair Value	125,092	134,870
Losses more than 12 Months, Gross Unrealized Losses	$ 10,611	$ 3,669

Loans and Allowance for Credi_3

Loans and Allowance for Credit Losses - Total Loans Outstanding by Portfolio Segment and Class of Financing Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	$ 10,089,117	$ 8,279,778
Unearned discount and fees	(35,194)	(26,351)
Total (Net of unearned discount and fees)	10,053,923	8,253,427
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	6,197,342	5,133,786
Commercial and Industrial | General C&I
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	3,275,362	2,746,454
Commercial and Industrial | Energy Sector
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	1,285,775	935,371
Commercial and Industrial | Restaurant Industry
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	1,096,366	1,035,538
Commercial and Industrial | Healthcare
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	539,839	416,423
Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	1,330,739	1,158,401
Commercial Real Estate | Income Producing
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	1,266,791	1,082,929
Commercial Real Estate | Land and Development
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	63,948	75,472
Consumer
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	2,294,753	1,765,736
Consumer | Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	2,227,653	1,690,814
Consumer | Other
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	67,100	74,922
Small Business Lending
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	$ 266,283	$ 221,855

Loans and Allowance for Credi_4

Loans and Allowance for Credit Losses - Additional Information (Details)	12 Months Ended
	Dec. 31, 2018USD ($)TDR	Dec. 31, 2017USD ($)TDR	Dec. 31, 2016USD ($)TDR
Accounts Notes And Loans Receivable [Line Items]
Interest income recognized for impaired loans	$ 300,000	$ 1,600,000	$ 1,400,000
Contractual interest recognized on cash basis	$ 1,700,000	$ 1,500,000	$ 1,100,000
Number of TDRs experiencing payment default | TDR		0	0
Number of TDRs | TDR	6	6	9
ACI Loans
Accounts Notes And Loans Receivable [Line Items]
Number of TDRs experiencing payment default | TDR	0	0	0
Number of TDRs | TDR	0	0
Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Foreclosed residential properties	$ 1,000,000	$ 2,700,000
Residential Real Estate | Consumer Loans
Accounts Notes And Loans Receivable [Line Items]
Residential mortgage loans in process of foreclosure	3,800,000	$ 4,400,000
Consumer
Accounts Notes And Loans Receivable [Line Items]
Number of TDRs | TDR		2	2
Consumer | Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Purchase of consumer residential real estate loans	$ 214,000,000
Premium percentage of consumer residential real estate loans	6.00%
Consumer | Residential Real Estate | ANCI Loans
Accounts Notes And Loans Receivable [Line Items]
Loans evaluated and determined credit impaired	$ 0

Loans and Allowance for Credi_5

Loans and Allowance for Credit Losses - Summary of Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period				$ 87,576				$ 82,268	$ 87,576	$ 82,268	$ 79,783
Provision for loan losses	$ 8,422	$ (1,365)	$ 1,263	4,380	$ (4,475)	$ 1,723	$ 6,701	5,786	12,700	9,735	49,348
Charge-offs									(8,045)	(6,871)	(49,302)
Recoveries									2,147	2,444	2,439
Balance at end of period	94,378				87,576				94,378	87,576	82,268
Loans ending balance	10,089,117				8,279,778				10,089,117	8,279,778
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period				55,919				54,688	55,919	54,688	55,824
Provision for loan losses									15,708	5,883	43,782
Charge-offs									(6,709)	(5,645)	(46,367)
Recoveries									1,398	993	1,449
Balance at end of period	66,316				55,919				66,316	55,919	54,688
Loans ending balance	6,197,342				5,133,786				6,197,342	5,133,786
Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period				11,990				10,103	11,990	10,103	8,136
Provision for loan losses									(1,837)	1,737	1,389
Charge-offs									(2)	(93)
Recoveries									301	243	578
Balance at end of period	10,452				11,990				10,452	11,990	10,103
Loans ending balance	1,330,739				1,158,401				1,330,739	1,158,401
Consumer
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period				14,983				13,265	14,983	13,265	13,450
Provision for loan losses									(900)	1,746	1,506
Charge-offs									(716)	(929)	(2,094)
Recoveries									336	901	403
Balance at end of period	13,703				14,983				13,703	14,983	13,265
Loans ending balance	2,294,753				1,765,736				2,294,753	1,765,736
Small Business Lending
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period				$ 4,684				$ 4,212	4,684	4,212	2,373
Provision for loan losses									(271)	369	2,671
Charge-offs									(618)	(204)	(841)
Recoveries									112	307	9
Balance at end of period	3,907				4,684				3,907	4,684	4,212
Loans ending balance	266,283				221,855				266,283	221,855
ACI Loans
Accounts Notes And Loans Receivable [Line Items]
Allowance for credit losses, collectively evaluated for impairment	7,717				8,300				7,717	8,300	10,043
Allowance for credit losses, individually evaluated for impairment	207				224				207	224	235
Loans collectively evaluated for impairment	191,906				241,959				191,906	241,959
Loans individually evaluated for impairment	11,369				18,601				11,369	18,601
Loans ending balance	203,275				260,560				203,275	260,560
ACI Loans | Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Allowance for credit losses, collectively evaluated for impairment	58				5				58	5	176
Loans collectively evaluated for impairment	13,018				19,486				13,018	19,486
Loans individually evaluated for impairment	3,789				10,091				3,789	10,091
Loans ending balance	16,807				29,577				16,807	29,577
ACI Loans | Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Allowance for credit losses, collectively evaluated for impairment	1,641				2,006				1,641	2,006	2,652
Allowance for credit losses, individually evaluated for impairment					4					4	3
Loans collectively evaluated for impairment	58,171				71,675				58,171	71,675
Loans individually evaluated for impairment	7,256				8,186				7,256	8,186
Loans ending balance	65,427				79,861				65,427	79,861
ACI Loans | Consumer
Accounts Notes And Loans Receivable [Line Items]
Allowance for credit losses, collectively evaluated for impairment	6,018				6,289				6,018	6,289	7,215
Allowance for credit losses, individually evaluated for impairment	207				220				207	220	232
Loans collectively evaluated for impairment	120,717				150,798				120,717	150,798
Loans individually evaluated for impairment	324				324				324	324
Loans ending balance	121,041				151,122				121,041	151,122
ANCI Loans
Accounts Notes And Loans Receivable [Line Items]
Allowance for credit losses, collectively evaluated for impairment	939				1,338				939	1,338	908
Allowance for credit losses, individually evaluated for impairment	113				58				113	58	70
Loans collectively evaluated for impairment	347,515				199,389				347,515	199,389
Loans individually evaluated for impairment	1,817				1,892				1,817	1,892
ANCI Loans | Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Allowance for credit losses, collectively evaluated for impairment	293				864				293	864	299
Loans collectively evaluated for impairment	50,469				58,775				50,469	58,775
ANCI Loans | Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Allowance for credit losses, collectively evaluated for impairment	53				130				53	130	243
Loans collectively evaluated for impairment	7,808				15,926				7,808	15,926
ANCI Loans | Consumer
Accounts Notes And Loans Receivable [Line Items]
Allowance for credit losses, collectively evaluated for impairment	535				49				535	49	94
Allowance for credit losses, individually evaluated for impairment	6				36				6	36	37
Loans collectively evaluated for impairment	280,776				113,357				280,776	113,357
Loans individually evaluated for impairment	1,538				1,582				1,538	1,582
ANCI Loans | Small Business Lending
Accounts Notes And Loans Receivable [Line Items]
Allowance for credit losses, collectively evaluated for impairment	58				295				58	295	272
Allowance for credit losses, individually evaluated for impairment	107				22				107	22	33
Loans collectively evaluated for impairment	8,462				11,331				8,462	11,331
Loans individually evaluated for impairment	279				310				279	310
Originated Loans
Accounts Notes And Loans Receivable [Line Items]
Allowance for credit losses, collectively evaluated for impairment	78,083				69,192				78,083	69,192	69,407
Allowance for credit losses, individually evaluated for impairment	7,319				8,464				7,319	8,464	1,605
Loans collectively evaluated for impairment	9,459,454				7,746,474				9,459,454	7,746,474
Loans individually evaluated for impairment	77,056				71,463				77,056	71,463
Originated Loans | Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Allowance for credit losses, collectively evaluated for impairment	58,665				46,591				58,665	46,591	52,615
Allowance for credit losses, individually evaluated for impairment	7,300				8,459				7,300	8,459	1,598
Loans collectively evaluated for impairment	6,053,264				4,974,973				6,053,264	4,974,973
Loans individually evaluated for impairment	76,802				70,461				76,802	70,461
Originated Loans | Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Allowance for credit losses, collectively evaluated for impairment	8,758				9,850				8,758	9,850	7,205
Loans collectively evaluated for impairment	1,257,504				1,062,614				1,257,504	1,062,614
Originated Loans | Consumer
Accounts Notes And Loans Receivable [Line Items]
Allowance for credit losses, collectively evaluated for impairment	6,918				8,389				6,918	8,389	5,687
Allowance for credit losses, individually evaluated for impairment	19								19
Loans collectively evaluated for impairment	1,891,144				1,499,260				1,891,144	1,499,260
Loans individually evaluated for impairment	254				415				254	415
Originated Loans | Small Business Lending
Accounts Notes And Loans Receivable [Line Items]
Allowance for credit losses, collectively evaluated for impairment	3,742				4,362				3,742	4,362	3,900
Allowance for credit losses, individually evaluated for impairment					5					5	$ 7
Loans collectively evaluated for impairment	$ 257,542				209,627				$ 257,542	209,627
Loans individually evaluated for impairment					$ 587					$ 587

Loans and Allowance for Credi_6

Loans and Allowance for Credit Losses - Summary of Impaired Loans (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment in Impaired Loans, With no related allowance for credit losses	[1]	$ 22,251	$ 21,590
Unpaid Principal Balance, With no related allowance for credit losses		35,443	30,508
Nonaccrual Loans Included in Impaired Loans, with no related allowance for credit losses		20,713	15,298
Undisbursed Commitments, With no related allowance for credit losses		3,658	387
Recorded Investment in Impaired Loans, With allowance for credit losses recorded	[1]	56,953	52,020
Unpaid Principal Balance, With allowance for credit losses recorded		58,374	55,800
Related Specific Allowance, With allowance for credit losses recorded		7,432	8,522
Nonaccrual Loans Included in Impaired Loans, With allowance for credit losses recorded		50,870	28,060
Undisbursed Commitments, With allowance for credit losses recorded		3,269	2,902
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment in Impaired Loans, With no related allowance for credit losses	[1]	20,713	19,832
Unpaid Principal Balance, With no related allowance for credit losses		33,908	28,301
Nonaccrual Loans Included in Impaired Loans, with no related allowance for credit losses		20,713	15,014
Undisbursed Commitments, With no related allowance for credit losses		3,658	387
Recorded Investment in Impaired Loans, With allowance for credit losses recorded	[1]	56,223	50,874
Unpaid Principal Balance, With allowance for credit losses recorded		56,871	54,385
Related Specific Allowance, With allowance for credit losses recorded		7,300	8,459
Nonaccrual Loans Included in Impaired Loans, With allowance for credit losses recorded		50,641	28,000
Undisbursed Commitments, With allowance for credit losses recorded		3,259	2,902
Commercial and Industrial | Energy Sector
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment in Impaired Loans, With no related allowance for credit losses	[1]	20,713	14,822
Unpaid Principal Balance, With no related allowance for credit losses		33,908	23,307
Nonaccrual Loans Included in Impaired Loans, with no related allowance for credit losses		20,713	14,822
Undisbursed Commitments, With no related allowance for credit losses		3,658	387
Recorded Investment in Impaired Loans, With allowance for credit losses recorded	[1]		39,857
Unpaid Principal Balance, With allowance for credit losses recorded			43,416
Related Specific Allowance, With allowance for credit losses recorded			8,353
Nonaccrual Loans Included in Impaired Loans, With allowance for credit losses recorded			28,000
Undisbursed Commitments, With allowance for credit losses recorded			402
Commercial and Industrial | General C&I
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment in Impaired Loans, With no related allowance for credit losses	[1]		5,010
Unpaid Principal Balance, With no related allowance for credit losses			4,994
Nonaccrual Loans Included in Impaired Loans, with no related allowance for credit losses			192
Recorded Investment in Impaired Loans, With allowance for credit losses recorded	[1]	28,684
Unpaid Principal Balance, With allowance for credit losses recorded		28,677
Related Specific Allowance, With allowance for credit losses recorded		3,559
Nonaccrual Loans Included in Impaired Loans, With allowance for credit losses recorded		24,103
Undisbursed Commitments, With allowance for credit losses recorded		930
Commercial and Industrial | Healthcare
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment in Impaired Loans, With allowance for credit losses recorded	[1]	4,496
Unpaid Principal Balance, With allowance for credit losses recorded		4,496
Related Specific Allowance, With allowance for credit losses recorded		256
Nonaccrual Loans Included in Impaired Loans, With allowance for credit losses recorded		4,496
Commercial and Industrial | Restaurant Industry
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment in Impaired Loans, With allowance for credit losses recorded	[1]	23,043	11,017
Unpaid Principal Balance, With allowance for credit losses recorded		23,698	10,969
Related Specific Allowance, With allowance for credit losses recorded		3,485	106
Nonaccrual Loans Included in Impaired Loans, With allowance for credit losses recorded		22,042
Undisbursed Commitments, With allowance for credit losses recorded		2,329	2,500
Consumer
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment in Impaired Loans, With no related allowance for credit losses	[1]	1,538	1,509
Unpaid Principal Balance, With no related allowance for credit losses		1,535	1,512
Nonaccrual Loans Included in Impaired Loans, with no related allowance for credit losses			35
Recorded Investment in Impaired Loans, With allowance for credit losses recorded	[1]	254
Unpaid Principal Balance, With allowance for credit losses recorded		254
Related Specific Allowance, With allowance for credit losses recorded		25
Consumer | Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment in Impaired Loans, With no related allowance for credit losses	[1]	1,538	1,093
Unpaid Principal Balance, With no related allowance for credit losses		1,535	1,097
Nonaccrual Loans Included in Impaired Loans, with no related allowance for credit losses			35
Recorded Investment in Impaired Loans, With allowance for credit losses recorded	[1]		496
Unpaid Principal Balance, With allowance for credit losses recorded			494
Related Specific Allowance, With allowance for credit losses recorded			36
Consumer | Other
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment in Impaired Loans, With no related allowance for credit losses	[1]		416
Unpaid Principal Balance, With no related allowance for credit losses			415
Recorded Investment in Impaired Loans, With allowance for credit losses recorded	[1]	254
Unpaid Principal Balance, With allowance for credit losses recorded		254
Related Specific Allowance, With allowance for credit losses recorded		25
Small Business Lending
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment in Impaired Loans, With no related allowance for credit losses	[1]		249
Unpaid Principal Balance, With no related allowance for credit losses			695
Nonaccrual Loans Included in Impaired Loans, with no related allowance for credit losses			249
Recorded Investment in Impaired Loans, With allowance for credit losses recorded	[1]	476	650
Unpaid Principal Balance, With allowance for credit losses recorded		1,249	921
Related Specific Allowance, With allowance for credit losses recorded		107	27
Nonaccrual Loans Included in Impaired Loans, With allowance for credit losses recorded		229	$ 60
Undisbursed Commitments, With allowance for credit losses recorded		$ 10
[1]	The recorded investment of a loan also includes any interest receivable, net unearned discount or fees, and unamortized premium or discount.

Loans and Allowance for Credi_7

Loans and Allowance for Credit Losses - Summary of Average Recorded Investment in Impaired Originated and ANCI Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts Notes And Loans Receivable [Line Items]
Average recorded investment	$ 58,196	$ 122,297	$ 171,634
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Average recorded investment	55,906	119,540	169,483
Commercial and Industrial | General C&I
Accounts Notes And Loans Receivable [Line Items]
Average recorded investment	10,834	8,586	11,291
Commercial and Industrial | Energy Sector
Accounts Notes And Loans Receivable [Line Items]
Average recorded investment	27,348	108,751	158,192
Commercial and Industrial | Restaurant Industry
Accounts Notes And Loans Receivable [Line Items]
Average recorded investment	16,600	2,203
Commercial and Industrial | Healthcare
Accounts Notes And Loans Receivable [Line Items]
Average recorded investment	1,124
Consumer
Accounts Notes And Loans Receivable [Line Items]
Average recorded investment	1,870	1,812	1,604
Consumer | Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Average recorded investment	1,557	1,426	1,206
Consumer | Other
Accounts Notes And Loans Receivable [Line Items]
Average recorded investment	313	386	398
Small Business Lending
Accounts Notes And Loans Receivable [Line Items]
Average recorded investment	$ 420	$ 945	$ 547

Loans and Allowance for Credi_8

Loans and Allowance for Credit Losses - Summary of Originated and ANCI Loans that Were Modified Into TDRs (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)TDR	Dec. 31, 2017USD ($)TDR	Dec. 31, 2016USD ($)TDR
Financing Receivable Modifications [Line Items]
Number of TDRs | TDR	6	6	9
Recorded Investment | $	$ 30,385	$ 16,904	$ 44,695
Commercial and Industrial
Financing Receivable Modifications [Line Items]
Number of TDRs | TDR	4	3	6
Recorded Investment | $	$ 30,244	$ 16,027	$ 43,609
Consumer
Financing Receivable Modifications [Line Items]
Number of TDRs | TDR		2	2
Recorded Investment | $		$ 739	$ 534
Small Business Lending
Financing Receivable Modifications [Line Items]
Number of TDRs | TDR	2	1	1
Recorded Investment | $	$ 141	$ 138	$ 552

Loans and Allowance for Credi_9

Loans and Allowance for Credit Losses - Schedule of Number of Loans Modified (Details) - TDR	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts Notes And Loans Receivable [Line Items]
Number of Loans Modified	6	6	9
Rate Concession
Accounts Notes And Loans Receivable [Line Items]
Number of Loans Modified	2	3	2
Modified Terms and/or Other Concessions
Accounts Notes And Loans Receivable [Line Items]
Number of Loans Modified	4	3	5
Forbearance Agreement
Accounts Notes And Loans Receivable [Line Items]
Number of Loans Modified			2
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Number of Loans Modified	4	3	6
Commercial and Industrial | Rate Concession
Accounts Notes And Loans Receivable [Line Items]
Number of Loans Modified		2	1
Commercial and Industrial | Modified Terms and/or Other Concessions
Accounts Notes And Loans Receivable [Line Items]
Number of Loans Modified	4	1	3
Commercial and Industrial | Forbearance Agreement
Accounts Notes And Loans Receivable [Line Items]
Number of Loans Modified			2
Consumer
Accounts Notes And Loans Receivable [Line Items]
Number of Loans Modified		2	2
Consumer | Modified Terms and/or Other Concessions
Accounts Notes And Loans Receivable [Line Items]
Number of Loans Modified		2	2
Small Business Lending
Accounts Notes And Loans Receivable [Line Items]
Number of Loans Modified	2	1	1
Small Business Lending | Rate Concession
Accounts Notes And Loans Receivable [Line Items]
Number of Loans Modified	2	1	1

Loans and Allowance for Cred_10

Loans and Allowance for Credit Losses - Summary of Credit Exposure by Portfolio Segment and Class of Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2018		Dec. 31, 2017
Financing Receivable Recorded Investment [Line Items]
Recorded investment	$ 249,133		$ 278,587
Special Mention
Financing Receivable Recorded Investment [Line Items]
Recorded investment	111,625		96,869
Special Mention | ACI Loans
Financing Receivable Recorded Investment [Line Items]
Recorded investment	1,722		6,930
Substandard
Financing Receivable Recorded Investment [Line Items]
Recorded investment	123,022		174,053
Substandard | ACI Loans
Financing Receivable Recorded Investment [Line Items]
Recorded investment	8,970		36,888
Doubtful
Financing Receivable Recorded Investment [Line Items]
Recorded investment	14,486		7,665
Doubtful | ACI Loans
Financing Receivable Recorded Investment [Line Items]
Recorded investment	39		37
Commercial and Industrial
Financing Receivable Recorded Investment [Line Items]
Recorded investment	242,048		252,600
Commercial and Industrial | General C&I
Financing Receivable Recorded Investment [Line Items]
Recorded investment	154,407		127,874
Commercial and Industrial | Restaurant Industry
Financing Receivable Recorded Investment [Line Items]
Recorded investment	50,620		17,042
Commercial and Industrial | Energy Sector
Financing Receivable Recorded Investment [Line Items]
Recorded investment	32,525		107,613
Commercial and Industrial | Healthcare
Financing Receivable Recorded Investment [Line Items]
Recorded investment	4,496		71
Commercial and Industrial | Special Mention
Financing Receivable Recorded Investment [Line Items]
Recorded investment	110,853		85,086
Commercial and Industrial | Special Mention | ACI Loans
Financing Receivable Recorded Investment [Line Items]
Recorded investment	426		737
Commercial and Industrial | Special Mention | General C&I
Financing Receivable Recorded Investment [Line Items]
Recorded investment	74,592		80,550
Commercial and Industrial | Special Mention | General C&I | ACI Loans
Financing Receivable Recorded Investment [Line Items]
Recorded investment	426		737
Commercial and Industrial | Special Mention | Restaurant Industry
Financing Receivable Recorded Investment [Line Items]
Recorded investment	24,449		4,536
Commercial and Industrial | Special Mention | Energy Sector
Financing Receivable Recorded Investment [Line Items]
Recorded investment	11,812
Commercial and Industrial | Substandard
Financing Receivable Recorded Investment [Line Items]
Recorded investment	116,709		159,880
Commercial and Industrial | Substandard | ACI Loans
Financing Receivable Recorded Investment [Line Items]
Recorded investment	1,445		7,321
Commercial and Industrial | Substandard | General C&I
Financing Receivable Recorded Investment [Line Items]
Recorded investment	79,815		47,324
Commercial and Industrial | Substandard | General C&I | ACI Loans
Financing Receivable Recorded Investment [Line Items]
Recorded investment	1,445		1,173
Commercial and Industrial | Substandard | Restaurant Industry
Financing Receivable Recorded Investment [Line Items]
Recorded investment	26,171		12,506
Commercial and Industrial | Substandard | Energy Sector
Financing Receivable Recorded Investment [Line Items]
Recorded investment	6,227		99,979
Commercial and Industrial | Substandard | Healthcare
Financing Receivable Recorded Investment [Line Items]
Recorded investment	4,496		71
Commercial and Industrial | Substandard | Healthcare | ACI Loans
Financing Receivable Recorded Investment [Line Items]
Recorded investment			6,148
Commercial and Industrial | Doubtful
Financing Receivable Recorded Investment [Line Items]
Recorded investment	14,486		7,634
Commercial and Industrial | Doubtful | ACI Loans
Financing Receivable Recorded Investment [Line Items]
Recorded investment	39		37
Commercial and Industrial | Doubtful | General C&I | ACI Loans
Financing Receivable Recorded Investment [Line Items]
Recorded investment	39		37
Commercial and Industrial | Doubtful | Energy Sector
Financing Receivable Recorded Investment [Line Items]
Recorded investment	14,486		7,634
Commercial Real Estate
Financing Receivable Recorded Investment [Line Items]
Recorded investment	985		46
Commercial Real Estate | Income Producing
Financing Receivable Recorded Investment [Line Items]
Recorded investment			26
Commercial Real Estate | Land and Development
Financing Receivable Recorded Investment [Line Items]
Recorded investment	985		20
Commercial Real Estate | Special Mention
Financing Receivable Recorded Investment [Line Items]
Recorded investment			20
Commercial Real Estate | Special Mention | ACI Loans
Financing Receivable Recorded Investment [Line Items]
Recorded investment	1,207		2,179
Commercial Real Estate | Special Mention | Income Producing | ACI Loans
Financing Receivable Recorded Investment [Line Items]
Recorded investment	1,207		2,179
Commercial Real Estate | Special Mention | Land and Development
Financing Receivable Recorded Investment [Line Items]
Recorded investment			20
Commercial Real Estate | Substandard
Financing Receivable Recorded Investment [Line Items]
Recorded investment	985		26
Commercial Real Estate | Substandard | ACI Loans
Financing Receivable Recorded Investment [Line Items]
Recorded investment	3,080		6,515
Commercial Real Estate | Substandard | Income Producing
Financing Receivable Recorded Investment [Line Items]
Recorded investment			26
Commercial Real Estate | Substandard | Income Producing | ACI Loans
Financing Receivable Recorded Investment [Line Items]
Recorded investment	3,080		6,515
Commercial Real Estate | Substandard | Land and Development
Financing Receivable Recorded Investment [Line Items]
Recorded investment	985
Consumer
Financing Receivable Recorded Investment [Line Items]
Recorded investment	3,315	[1]	21,059
Consumer | Other
Financing Receivable Recorded Investment [Line Items]
Recorded investment			1,033
Consumer | Residential Real Estate
Financing Receivable Recorded Investment [Line Items]
Recorded investment	3,315	[1]	20,026
Consumer | Special Mention
Financing Receivable Recorded Investment [Line Items]
Recorded investment			8,283
Consumer | Special Mention | ACI Loans
Financing Receivable Recorded Investment [Line Items]
Recorded investment	89		4,014
Consumer | Special Mention | Other
Financing Receivable Recorded Investment [Line Items]
Recorded investment			673
Consumer | Special Mention | Other | ACI Loans
Financing Receivable Recorded Investment [Line Items]
Recorded investment			114
Consumer | Special Mention | Residential Real Estate
Financing Receivable Recorded Investment [Line Items]
Recorded investment			7,610
Consumer | Special Mention | Residential Real Estate | ACI Loans
Financing Receivable Recorded Investment [Line Items]
Recorded investment	89		3,900
Consumer | Substandard
Financing Receivable Recorded Investment [Line Items]
Recorded investment	3,315	[1]	12,772
Consumer | Substandard | ACI Loans
Financing Receivable Recorded Investment [Line Items]
Recorded investment	4,445		23,052
Consumer | Substandard | Other
Financing Receivable Recorded Investment [Line Items]
Recorded investment			356
Consumer | Substandard | Other | ACI Loans
Financing Receivable Recorded Investment [Line Items]
Recorded investment	3		417
Consumer | Substandard | Residential Real Estate
Financing Receivable Recorded Investment [Line Items]
Recorded investment	3,315	[1]	12,416
Consumer | Substandard | Residential Real Estate | ACI Loans
Financing Receivable Recorded Investment [Line Items]
Recorded investment	4,442		22,635
Consumer | Doubtful
Financing Receivable Recorded Investment [Line Items]
Recorded investment			4
Consumer | Doubtful | Other
Financing Receivable Recorded Investment [Line Items]
Recorded investment			4
Small Business Lending
Financing Receivable Recorded Investment [Line Items]
Recorded investment	2,785		4,882
Small Business Lending | Special Mention
Financing Receivable Recorded Investment [Line Items]
Recorded investment	772		3,480
Small Business Lending | Substandard
Financing Receivable Recorded Investment [Line Items]
Recorded investment	$ 2,013		1,375
Small Business Lending | Doubtful
Financing Receivable Recorded Investment [Line Items]
Recorded investment			$ 27
[1]	During the third quarter of 2018, the Company began determining the risk rating classification for its consumer portfolio based on delinquency and nonaccrual status in accordance with the Uniform Retail Credit Classification guidance, which contributed to a lower amount of criticized and classified loans from the previous periods.

Loans and Allowance for Cred_11

Loans and Allowance for Credit Losses - Summary of Aging of Past Due Originated and ANCI Loans by Portfolio Segment and Class of Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accruing Loans | 30-59 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	$ 1,913	$ 4,768
Accruing Loans | 60-89 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	513	1,361
Accruing Loans | 90+DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	760	827
Non-Accruing Loans | 30-59 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	356	474
Non-Accruing Loans | 60-89 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	99	293
Non-Accruing Loans | 90+DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	1,479	13,206
Non-Accruing Loans | 0-29 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	72,305	33,495
Commercial and Industrial | Accruing Loans | 30-59 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	120	59
Commercial and Industrial | Accruing Loans | 90+DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due		476
Commercial and Industrial | Non-Accruing Loans | 30-59 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	176	263
Commercial and Industrial | Non-Accruing Loans | 90+DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due		10,507
Commercial and Industrial | Non-Accruing Loans | 0-29 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	71,179	32,315
Commercial and Industrial | General C&I | Accruing Loans | 30-59 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	120	59
Commercial and Industrial | General C&I | Accruing Loans | 90+DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due		476
Commercial and Industrial | General C&I | Non-Accruing Loans | 30-59 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	176	192
Commercial and Industrial | General C&I | Non-Accruing Loans | 0-29 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	23,928
Commercial and Industrial | Restaurant Industry | Non-Accruing Loans | 0-29 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	22,043
Commercial and Industrial | Energy Sector | Non-Accruing Loans | 90+DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due		10,507
Commercial and Industrial | Energy Sector | Non-Accruing Loans | 0-29 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	20,712	32,315
Commercial and Industrial | Healthcare | Non-Accruing Loans | 30-59 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due		71
Commercial and Industrial | Healthcare | Non-Accruing Loans | 0-29 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	4,496
Commercial Real Estate | Accruing Loans | 30-59 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due		55
Commercial Real Estate | Accruing Loans | 60-89 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	61
Commercial Real Estate | Accruing Loans | 90+DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due		26
Commercial Real Estate | Accruing Loans | Income Producing | 90+DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due		26
Commercial Real Estate | Accruing Loans | Land and Development | 30-59 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due		55
Commercial Real Estate | Accruing Loans | Land and Development | 60-89 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	61
Consumer | Accruing Loans | 30-59 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	1,302	3,723
Consumer | Accruing Loans | 30-59 DPD | Residential Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	1,275	3,191
Consumer | Accruing Loans | 30-59 DPD | Other
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	27	532
Consumer | Accruing Loans | 60-89 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	427	1,033
Consumer | Accruing Loans | 60-89 DPD | Residential Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	315	1,030
Consumer | Accruing Loans | 60-89 DPD | Other
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	112	3
Consumer | Accruing Loans | 90+DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	760	325
Consumer | Accruing Loans | 90+DPD | Residential Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	760	325
Consumer | Non-Accruing Loans | 30-59 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	151	173
Consumer | Non-Accruing Loans | 30-59 DPD | Residential Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	151	173
Consumer | Non-Accruing Loans | 60-89 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	95	293
Consumer | Non-Accruing Loans | 60-89 DPD | Residential Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	95	293
Consumer | Non-Accruing Loans | 90+DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	1,429	2,205
Consumer | Non-Accruing Loans | 90+DPD | Residential Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	1,429	2,205
Consumer | Non-Accruing Loans | 0-29 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	876	1,070
Consumer | Non-Accruing Loans | 0-29 DPD | Residential Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	876	1,070
Small Business Lending | Accruing Loans | 30-59 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	491	931
Small Business Lending | Accruing Loans | 60-89 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	25	328
Small Business Lending | Non-Accruing Loans | 30-59 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	29	38
Small Business Lending | Non-Accruing Loans | 60-89 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	4
Small Business Lending | Non-Accruing Loans | 90+DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	50	494
Small Business Lending | Non-Accruing Loans | 0-29 DPD
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	$ 250	$ 110

Loans and Allowance for Cred_12

Loans and Allowance for Credit Losses - Total Acquired Credit Impaired Loans Outstanding by Portfolio Segment and Class of Financing Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	$ 10,089,117	$ 8,279,778
ACI
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	203,275	260,560
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	6,197,342	5,133,786
Commercial and Industrial | ACI
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	16,807	29,577
Commercial and Industrial | General C&I
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	3,275,362	2,746,454
Commercial and Industrial | General C&I | ACI
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	16,807	23,428
Commercial and Industrial | Healthcare
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	539,839	416,423
Commercial and Industrial | Healthcare | ACI
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable		6,149
Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	1,330,739	1,158,401
Commercial Real Estate | ACI
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	65,427	79,861
Commercial Real Estate | Income Producing
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	1,266,791	1,082,929
Commercial Real Estate | Income Producing | ACI
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	65,427	79,861
Consumer
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	2,294,753	1,765,736
Consumer | Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	2,227,653	1,690,814
Consumer | Other
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	67,100	74,922
Consumer | ACI
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	121,041	151,122
Consumer | ACI | Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	120,495	149,942
Consumer | ACI | Other
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	$ 546	$ 1,180

Loans and Allowance for Cred_13

Loans and Allowance for Credit Losses - Summary of Changes in Accretable Discount for ACI Loans (Details) - ACI Loans - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable Recorded Investment [Line Items]
Balance at beginning of period	$ 78,422	$ 98,728	$ 122,791
Maturities/payoff	(7,456)	(9,888)	(11,563)
Charge-offs	(77)	(129)	(286)
Foreclosure	(436)	(1,061)	(1,041)
Accretion	(19,813)	(23,303)	(30,870)
Reclass from nonaccretable difference due to increases in expected cash flow	16,765	14,075	19,697
Balance at end of period	$ 67,405	$ 78,422	$ 98,728

Loans and Allowance for Cred_14

Loans and Allowance for Credit Losses - Summary of Individually Impaired ACI Loans and Pooled ACI Loans (Details) - USD ($) $ in Thousands		Dec. 31, 2018		Dec. 31, 2017
Financing Receivable Impaired [Line Items]
Recorded Investment in Impaired Loans		$ 249,133		$ 278,587
Commercial and Industrial
Financing Receivable Impaired [Line Items]
Recorded Investment in Impaired Loans		242,048		252,600
Commercial Real Estate
Financing Receivable Impaired [Line Items]
Recorded Investment in Impaired Loans		985		46
Consumer
Financing Receivable Impaired [Line Items]
Recorded Investment in Impaired Loans		3,315	[1]	21,059
ACI Loans and Pooled ACI Loans
Financing Receivable Impaired [Line Items]
Recorded Investment in Impaired Loans	[2]	94,418		115,000
Unpaid Principal Balance		117,832		152,024
Related Specific Allowance		7,924		8,524
Nonaccrual Loans Included in Impaired Loans				225
ACI Loans and Pooled ACI Loans | Commercial and Industrial
Financing Receivable Impaired [Line Items]
Recorded Investment in Impaired Loans	[2]	2,100		13,541
Unpaid Principal Balance		2,331		17,630
Related Specific Allowance		58		5
ACI Loans and Pooled ACI Loans | Commercial Real Estate
Financing Receivable Impaired [Line Items]
Recorded Investment in Impaired Loans	[2]	74,017		82,856
Unpaid Principal Balance		97,613		112,330
Related Specific Allowance		1,641		2,010
Nonaccrual Loans Included in Impaired Loans				225
ACI Loans and Pooled ACI Loans | Consumer
Financing Receivable Impaired [Line Items]
Recorded Investment in Impaired Loans	[2]	18,301		18,603
Unpaid Principal Balance		17,888		22,064
Related Specific Allowance		$ 6,225		$ 6,509
[1]	During the third quarter of 2018, the Company began determining the risk rating classification for its consumer portfolio based on delinquency and nonaccrual status in accordance with the Uniform Retail Credit Classification guidance, which contributed to a lower amount of criticized and classified loans from the previous periods.
[2]	The recorded investment of a loan also includes any interest receivable, net unearned discount or fees, and unamortized premium or discount.

Loans and Allowance for Cred_15

Loans and Allowance for Credit Losses - Summary of Consumer Credit Exposure on ACI loans, Based on Past Due Status (Details) - ACI Loans - Consumer - USD ($) $ in Thousands		Dec. 31, 2018		Dec. 31, 2017
Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Loans Past Due		$ 122,639	[1]	$ 152,336
Residential Real Estate | 0-29 DPD
Accounts Notes And Loans Receivable [Line Items]
Loans Past Due		115,404	[1]	139,662
Residential Real Estate | 30-59 DPD
Accounts Notes And Loans Receivable [Line Items]
Loans Past Due		1,985	[1]	2,299
Residential Real Estate | 60-89 DPD
Accounts Notes And Loans Receivable [Line Items]
Loans Past Due		1,435	[1]	2,496
Residential Real Estate | Financing Receivables 90 to 119 Days Past Due
Accounts Notes And Loans Receivable [Line Items]
Loans Past Due		217	[1]	399
Residential Real Estate | Financing Receivables 120 Days Past Due
Accounts Notes And Loans Receivable [Line Items]
Loans Past Due		3,598	[1]	7,480
Other
Accounts Notes And Loans Receivable [Line Items]
Loans Past Due		939	[1]	1,583
Other | 0-29 DPD
Accounts Notes And Loans Receivable [Line Items]
Loans Past Due		845	[1]	1,356
Other | 30-59 DPD
Accounts Notes And Loans Receivable [Line Items]
Loans Past Due		91	[1]	120
Other | 60-89 DPD
Accounts Notes And Loans Receivable [Line Items]
Loans Past Due				62
Other | Financing Receivables 90 to 119 Days Past Due
Accounts Notes And Loans Receivable [Line Items]
Loans Past Due	[1]	$ 3
Other | Financing Receivables 120 Days Past Due
Accounts Notes And Loans Receivable [Line Items]
Loans Past Due				$ 45
[1]	During the third quarter of 2018, the Company began determining the risk rating classification for its consumer portfolio based on delinquency and nonaccrual status in accordance with the Uniform Retail Credit Classification guidance, which contributed to a lower amount of nonaccrual loans from the previous periods.

Premises and Equipment - Compon

Premises and Equipment - Components of Premises and Equipment (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Gross premises and equipment		$ 111,862	$ 104,618
Less: Accumulated depreciation and amortization		(48,241)	(41,186)
Total premises and equipment, net		63,621	63,432
Land
Property, Plant and Equipment [Line Items]
Gross premises and equipment		16,604	16,875
Buildings, construction and improvements
Property, Plant and Equipment [Line Items]
Gross premises and equipment	[1]	$ 54,298	53,620
Buildings, construction and improvements | Minimum
Property, Plant and Equipment [Line Items]
Premises and equipment, Estimated Useful Life in Years	[1]	2 years
Buildings, construction and improvements | Maximum
Property, Plant and Equipment [Line Items]
Premises and equipment, Estimated Useful Life in Years	[1]	40 years
Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Gross premises and equipment		$ 70,902	70,495
Equipment
Property, Plant and Equipment [Line Items]
Gross premises and equipment		$ 40,960	$ 34,123
Equipment | Minimum
Property, Plant and Equipment [Line Items]
Premises and equipment, Estimated Useful Life in Years		3 years
Equipment | Maximum
Property, Plant and Equipment [Line Items]
Premises and equipment, Estimated Useful Life in Years		10 years
[1]	Leasehold improvements are depreciated over the lesser of the estimated useful life or the lease term.

Premises and Equipment - Additi

Premises and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Amount charged to operating expenses for depreciation	$ 7,600	$ 7,100	$ 6,700
Amount charged to operating expenses for software amortization	2,755	4,652	6,532
Software Costs
Net Software cost included in other asset	4,000	4,000
Premises And Equipment
Rental expenses for premises and equipment	12,100	11,200	11,100
Software Amortization
Amount charged to operating expenses for software amortization	$ 1,700	$ 1,900	$ 1,700

Premises and Equipment - Future

Premises and Equipment - Future Minimum Lease Payments under Operating Leases (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Operating Leased Assets [Line Items]
2,019	$ 10,304
2,020	9,261
2,021	8,517
2,022	6,220
2,023	3,968
Thereafter	5,302
Total minimum lease payments	43,572
Property
Operating Leased Assets [Line Items]
2,019	10,005
2,020	9,103
2,021	8,445
2,022	6,220
2,023	3,968
Thereafter	5,302
Total minimum lease payments	43,043
Equipment
Operating Leased Assets [Line Items]
2,019	299
2,020	158
2,021	72
Total minimum lease payments	$ 529

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Summary of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Goodwill And Other Intangible Assets [Line Items]
Goodwill	$ 307,083	$ 317,817
Other intangible assets, net	7,317	10,223
Total goodwill and intangible assets	314,400	328,040
Core Deposit
Goodwill And Other Intangible Assets [Line Items]
Other intangible assets, net	301	1,595
Customer Lists
Goodwill And Other Intangible Assets [Line Items]
Other intangible assets, net	6,992	8,604
Trademarks
Goodwill And Other Intangible Assets [Line Items]
Other intangible assets, net	$ 24	$ 24

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Summary of Goodwill and Other Intangible Assets (Parenthetical) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Core Deposit
Goodwill And Other Intangible Assets [Line Items]
Accumulated amortization of intangible assets	$ 39,385	$ 38,091
Customer Lists
Goodwill And Other Intangible Assets [Line Items]
Accumulated amortization of intangible assets	$ 19,709	$ 18,097

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Additional Information (Details) - Town & Country Insurance Agency, Inc. - Unrelated Third Party $ in Millions	May 31, 2018USD ($)
Goodwill And Other Intangible Assets [Line Items]
Sale of net assets	$ 11.1
Goodwill and Intangible Assets
Goodwill And Other Intangible Assets [Line Items]
Sale of net assets	$ 10.9

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets - Summary of Estimated Amortization Expense (Details) $ in Thousands	Dec. 31, 2018USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
2,019	$ 1,344
2,020	910
2,021	805
2,022	735
2023 and thereafter	$ 3,500

Derivatives - Schedule of Notio

Derivatives - Schedule of Notional Amounts and Estimated Fair Values (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Derivatives Fair Value [Line Items]
Notional Amount	$ 2,696,100	$ 2,350,759
Fair Value, Other Assets	11,136	3,958
Fair Value, Other Liabilities	32,350	25,280
Derivatives Designated as Hedging Instruments | Cash Flow Hedges | Commercial Loans | Interest Rate Swaps
Derivatives Fair Value [Line Items]
Notional Amount	650,000	1,032,000
Fair Value, Other Liabilities	23,968	21,394
Derivatives Not Designated as Hedging Instruments
Derivatives Fair Value [Line Items]
Notional Amount	2,046,100	1,318,759
Fair Value, Other Assets	11,136	3,958
Fair Value, Other Liabilities	8,382	3,886
Derivatives Not Designated as Hedging Instruments | Mortgage Loan Held for Sale Interest Rate Lock Commitments
Derivatives Fair Value [Line Items]
Notional Amount	5,286	6,119
Fair Value, Other Assets	72	50
Derivatives Not Designated as Hedging Instruments | Mortgage Loan Held for Sale Floating Commitments
Derivatives Fair Value [Line Items]
Notional Amount	14,690	11,800
Derivatives Not Designated as Hedging Instruments | Foreign Exchange Contracts
Derivatives Fair Value [Line Items]
Notional Amount	46,971	41,688
Fair Value, Other Assets	698	635
Fair Value, Other Liabilities	683	623
Derivatives Not Designated as Hedging Instruments | Commercial Loans | Interest Rate Swaps
Derivatives Fair Value [Line Items]
Notional Amount	1,155,942	737,533
Fair Value, Other Assets	4,439	2,056
Fair Value, Other Liabilities	1,777	2,056
Derivatives Not Designated as Hedging Instruments | Commercial Loans | Interest Rate Caps
Derivatives Fair Value [Line Items]
Notional Amount	88,430	186,290
Fair Value, Other Assets	239	153
Fair Value, Other Liabilities	239	153
Derivatives Not Designated as Hedging Instruments | Commercial Loans | Interest Rate Floors
Derivatives Fair Value [Line Items]
Notional Amount	652,822	330,764
Fair Value, Other Assets	5,587	1,054
Fair Value, Other Liabilities	5,587	1,054
Derivatives Not Designated as Hedging Instruments | Commercial Loans | Interest Rate Collars
Derivatives Fair Value [Line Items]
Notional Amount	80,000
Fair Value, Other Assets	96
Fair Value, Other Liabilities	96
Derivatives Not Designated as Hedging Instruments | Forward Contracts | Mortgage Loan Forward Sale Commitments
Derivatives Fair Value [Line Items]
Notional Amount	1,959	4,565
Fair Value, Other Assets	$ 5	$ 10

Derivatives - Additional Inform

Derivatives - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Deferred net gains (loss) on derivatives	$ (7.8)
Cash Flow Hedges
Derivative [Line Items]
Maximum period for hedging transactions	7 years
Interest-bearing Deposits in Banks
Derivative [Line Items]
Cash or securities pledged as collateral	$ 25.3	$ 20.1

Derivatives - Schedule of Gain

Derivatives - Schedule of Gain (Loss) in Consolidated Statements of Income Related to Derivative Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative Instruments Gain Loss [Line Items]
Noninterest income	$ (7,800)
Derivatives Designated as Hedging Instruments | Cash Flow Hedges | Commercial Loans | Interest Rate Swaps
Derivative Instruments Gain Loss [Line Items]
OCI	(7,711)	$ (1,426)	$ (7,444)
Reclassified from AOCI to interest income	(5,164)	3,705	11,255
Noninterest income			166
Derivatives Not Designated as Hedging Instruments | Mortgage Loan Held for Sale Interest Rate Lock Commitments
Derivative Instruments Gain Loss [Line Items]
Noninterest income	22	(39)	24
Derivatives Not Designated as Hedging Instruments | Foreign Exchange Contracts
Derivative Instruments Gain Loss [Line Items]
Noninterest income	$ 2,222	$ 2,271	$ 1,264

Derivative - Schedule of Intere

Derivative - Schedule of Interest Rate Swap Agreements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Notional Amount	$ 2,696,100	$ 2,350,759
1.3250% Interest Rate Swap
Derivative [Line Items]
Effective Date	Jun. 30, 2015
Maturity Date	Dec. 31, 2019
Notional Amount	$ 300,000
Fixed Rate	1.512%
Variable Rate	1 Month LIBOR
1.5120% Interest Rate Swap
Derivative [Line Items]
Effective Date	Mar. 8, 2016
Maturity Date	Feb. 27, 2026
Notional Amount	$ 175,000
Fixed Rate	1.5995%
Variable Rate	1 Month LIBOR
1.5995% Interest Rate Swap
Derivative [Line Items]
Effective Date	Mar. 8, 2016
Maturity Date	Feb. 27, 2026
Notional Amount	$ 175,000
Fixed Rate	1.589%
Variable Rate	1 Month LIBOR

Deposits - Additional Informati

Deposits - Additional Information (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Time Deposits [Line Items]
Time Deposits	$ 2,356,735,000
Domestic
Time Deposits [Line Items]
Time deposits $250,000 and over	491,300,000	$ 382,400,000
Foreign
Time Deposits [Line Items]
Time Deposits	$ 0	$ 0

Deposits - Scheduled Maturities

Deposits - Scheduled Maturities Of Time Deposits Included In Interest-Bearing Deposits (Details) $ in Thousands	Dec. 31, 2018USD ($)
Deposits [Abstract]
2,019	$ 1,726,122
2,020	515,952
2,021	98,400
2,022	10,995
2023 and thereafter	5,266
Total	$ 2,356,735

Borrowed Funds - Additional Inf

Borrowed Funds - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
	Mar. 31, 2015	Jun. 30, 2014	Dec. 31, 2018	Dec. 31, 2017
Borrowed Funds [Line Items]
Carrying value of securities pledged			$ 3,300	$ 7,500
Unregistered multi tranche debt Transactions		$ 245,000
Unregistered debt transactions	$ 50,000
Subordinated debt			$ 98,910	98,687
Subordinate debt capital treatment achievement period			10 years
FHLB advances			$ 150,000	150,000
Irrevocable letter of credit			590,000	386,500
FRB
Borrowed Funds [Line Items]
Borrowings from FRB			0	0
Public Fund Treasury Management Deposit
Borrowed Funds [Line Items]
Irrevocable letter of credit			555,000
Commercial Loans | FRB
Borrowed Funds [Line Items]
Collateralized borrowings from FRB			740,300
Commercial and Residential Real Estate Loan
Borrowed Funds [Line Items]
FHLB advances collateral amount			$ 1,600,000	$ 1,600,000
4.875% Senior Notes, Due June 28, 2019
Borrowed Funds [Line Items]
Subordinated debt maturity period			4 years
5.375% Senior Notes, Due June 28, 2021
Borrowed Funds [Line Items]
Subordinated debt maturity period			7 years
7.250% Subordinated Notes, Due June 28, 2029, Callable in 2024
Borrowed Funds [Line Items]
Subordinated debt maturity period			15 years
Subordinated debt			$ 35,000
Call option period			10 years
6.250% Subordinated Notes, Due June 28, 2029, Callable in 2024
Borrowed Funds [Line Items]
Subordinated debt maturity period			15 years
Subordinated debt			$ 25,000
Call option period			10 years
6.500% Subordinated Notes, Due March 2025, Callable in 2020
Borrowed Funds [Line Items]
Subordinated debt			$ 40,000
Call option period			5 years
Expiration on September 28, 2020 | SAFE Program Deposits
Borrowed Funds [Line Items]
Irrevocable letter of credit			$ 35,000
Letter of credit expiration date			Sep. 28, 2020
Letter of credit expiration period			45 days
Letter of credit extended expiration term			1 year
Expiration on January 2019 | Public Fund Treasury Management Deposit
Borrowed Funds [Line Items]
Irrevocable letter of credit			$ 205,000
Letter of credit expiration date			Jan. 31, 2019
Letter of credit expiration period			45 days
Letter of credit extended expiration term			1 year
Expiration on May 26, 2021 | Public Fund Treasury Management Deposit
Borrowed Funds [Line Items]
Irrevocable letter of credit			$ 350,000
Letter of credit expiration date			May 26, 2021
Letter of credit expiration period			45 days
Letter of credit extended expiration term			1 year
Minimum
Borrowed Funds [Line Items]
Repurchase agreement maturity period			one day
Maximum
Borrowed Funds [Line Items]
Repurchase agreement maturity period			seven days

Borrowed Funds - Summary of Sec

Borrowed Funds - Summary of Securities Sold Under Agreements to Repurchase (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Balance at period end	$ 1,106,000	$ 1,026,000
Average balance during the period	$ 1,630,000	$ 3,371,000
Average interest rate during the period	0.25%	0.25%
Maximum month-end balance during the period	$ 2,384,000	$ 6,286,000

Borrowed Funds - Summary of Deb

Borrowed Funds - Summary of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Debt issue cost and unamortized premium	$ (1,211)	$ (1,606)
Total	283,711	283,316
4.875% Senior Notes, Due June 28, 2019
Debt Instrument [Line Items]
Purchased senior notes	(10,078)	(10,078)
Cadence Bancorporation
Debt Instrument [Line Items]
Long-term debt, gross	270,000	270,000
Cadence Bancorporation | 4.875% Senior Notes, Due June 28, 2019
Debt Instrument [Line Items]
Long-term debt, gross	145,000	145,000
Cadence Bancorporation | 5.375% Senior Notes, Due June 28, 2021
Debt Instrument [Line Items]
Long-term debt, gross	50,000	50,000
Cadence Bancorporation | 7.250% Subordinated Notes, Due June 28, 2029, Callable in 2024
Debt Instrument [Line Items]
Long-term debt, gross	35,000	35,000
Cadence Bancorporation | 6.500% Subordinated Notes, Due March 2025, Callable in 2020
Debt Instrument [Line Items]
Long-term debt, gross	40,000	40,000
Cadence Bank | 6.250% Subordinated Notes, Due June 28, 2029, Callable in 2024
Debt Instrument [Line Items]
Long-term debt, gross	$ 25,000	$ 25,000

Borrowed Funds - Summary of D_2

Borrowed Funds - Summary of Debt (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
4.875% Senior Notes, Due June 28, 2019
Debt Instrument [Line Items]
Debt instrument, interest rate	4.875%	4.875%
Debt instrument, maturity date	Jun. 28, 2019	Jun. 28, 2019
5.375% Senior Notes, Due June 28, 2021
Debt Instrument [Line Items]
Debt instrument, interest rate	5.375%	5.375%
Debt instrument, maturity date	Jun. 28, 2021	Jun. 28, 2021
7.250% Subordinated Notes, Due June 28, 2029, Callable in 2024
Debt Instrument [Line Items]
Debt instrument, interest rate	7.25%	7.25%
Debt instrument, maturity date	Jun. 28, 2029	Jun. 28, 2029
6.500% Subordinated Notes, Due March 2025, Callable in 2020
Debt Instrument [Line Items]
Debt instrument, interest rate	6.50%	6.50%
Debt instrument, maturity date	Mar. 31, 2025	Mar. 31, 2025
6.250% Subordinated Notes, Due June 28, 2029, Callable in 2024
Debt Instrument [Line Items]
Debt instrument, interest rate	6.25%	6.25%
Debt instrument, maturity date	Jun. 28, 2029	Jun. 28, 2029

Borrowed Funds - Summary of Jun

Borrowed Funds - Summary of Junior Subordinated Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Junior subordinated debentures, gross	$ 50,619	$ 50,619
Purchase accounting adjustment, net of amortization	(13,666)	(14,147)
Total junior subordinated debentures	36,953	36,472
3 month LIBOR plus 2.85%, due 2033
Debt Instrument [Line Items]
Junior subordinated debentures, gross	30,000	30,000
3 month LIBOR plus 2.95%, due 2033
Debt Instrument [Line Items]
Junior subordinated debentures, gross	5,155	5,155
3 month LIBOR plus 1.75%, due 2037
Debt Instrument [Line Items]
Junior subordinated debentures, gross	$ 15,464	$ 15,464

Borrowed Funds - Summary of J_2

Borrowed Funds - Summary of Junior Subordinated Debt (Parenthetical) (Details) - Junior subordinated debt	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
3 month LIBOR plus 2.85%, due 2033
Debt Instrument [Line Items]
Debt instrument, interest rate	2.85%	2.85%
Debt instrument maturity year	2,033	2,033
3 month LIBOR plus 2.95%, due 2033
Debt Instrument [Line Items]
Debt instrument, interest rate	2.95%	2.95%
Debt instrument maturity year	2,033	2,033
3 month LIBOR plus 1.75%, due 2037
Debt Instrument [Line Items]
Debt instrument, interest rate	1.75%	1.75%
Debt instrument maturity year	2,037	2,037

Other Noninterest Income and _3

Other Noninterest Income and Other Noninterest Expense - Summary of Other Noninterest Income and Other Noninterest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other noninterest income
Insurance revenue	$ 2,677	$ 7,378	$ 7,717
Bankcard fees	5,951	7,310	7,270
Income from bank owned life insurance policies	3,450	3,313	2,954
Other	6,033	6,655	(263)
Total other noninterest income	18,111	24,656	17,678
Other noninterest expense
Net cost of operation of other real estate owned	653	2,251	3,033
Data processing expense	8,775	7,590	6,280
Consulting and professional fees	13,285	9,090	6,728
Loan related expenses	3,145	2,379	3,114
FDIC insurance	4,645	4,275	7,228
Communications	2,773	2,837	2,656
Advertising and public relations	2,523	2,048	1,369
Legal expenses	3,732	4,274	2,721
Other	27,649	25,921	27,469
Total other noninterest expense	$ 67,180	$ 60,665	$ 60,598

Income Taxes - Components of th

Income Taxes - Components of the Consolidated Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal									$ 36,862	$ 33,799	$ 24,394
State									3,791	2,458	2,166
Total current expense									40,653	36,257	26,560
Deferred:
Federal									3,791	44,009	5,439
State									673	380	541
Total deferred expense									4,464	44,389	5,980
Total income tax expense	$ 10,709	$ 15,074	$ 8,384	$ 10,950	$ 36,980	$ 17,457	$ 13,570	$ 12,639	$ 45,117	$ 80,646	$ 32,540

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Statutory Federal income tax rate	21.00%	35.00%	35.00%
Provisional income tax expense relating to from Tax Reform		$ 19,000,000
Realization of deferred tax asset	$ 54,100,000
Future taxable income	191,200,000
Unrecognized tax benefits that would impact effective tax rate	1,000,000	600,000
Interest and penalties recognized	57,000	(4,000)
Accrued interest and penalties on unrecognized tax benefits	137,000	$ 88,000
U.S. Federal
Income Tax Disclosure [Abstract]
Net operating loss carryforwards	$ 37,900,000
Federal net operating loss carry forward expiration year	2,031
State and Local Jurisdiction [Member]
Income Tax Disclosure [Abstract]
Net operating loss carryforwards	$ 21,200,000
Federal net operating loss carry forward expiration year	2,023
ATM
Income Tax Disclosure [Abstract]
AMT credit carryforward	$ 978,000

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Total Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Computed income tax expense at statutory rate									$ 44,389	$ 64,050	$ 34,410
Effects of tax reform									(284)	19,022
Tax exempt interest, net									(1,609)	(3,988)	(2,744)
BOLI income									(717)	(1,148)	(1,023)
State tax expense									3,527	2,279	1,760
Goodwill writeoff on sale of subsidiary assets									2,254
One-time bad debt deduction on legacy loan portfolio									(5,565)
Other, net									3,122	431	137
Total income tax expense	$ 10,709	$ 15,074	$ 8,384	$ 10,950	$ 36,980	$ 17,457	$ 13,570	$ 12,639	$ 45,117	$ 80,646	$ 32,540

Income Taxes - Significant Comp

Income Taxes - Significant Components of the Company's Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred income tax assets:
Allowance for credit losses	$ 20,256	$ 18,464
Deferred compensation	3,338	3,440
Accrued compensation	3,630	2,506
Net operating loss carryforwards	8,893	9,859
Alternative minimum tax credit carryover	978	978
Unrealized loss on securities, net	7,910	1,271
Unrealized loss on derivative instruments	5,496	4,912
Other	3,588	6,198
Total deferred income tax assets	54,089	47,628
Deferred income tax liabilities:
Difference in book and tax basis of intangibles	1,573	1,927
Other	6,239	4,213
Excess of book basis in assets acquired and tax liabilities assumed over book carrying value:
Intangibles	9,473	7,122
Other	3,580	3,592
Total deferred income tax liabilities	20,865	16,854
Net deferred income tax asset	$ 33,224	$ 30,774

Income Taxes - Reconciliation_2

Income Taxes - Reconciliation of the Beginning and Ending Amount of Unrecognized Income Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Unrecognized income tax benefits	$ 894	$ 944
Increases for tax positions related to prior years	0	9	$ 422
Increases for tax positions related to current year	479	394	522
Decreases for tax positions related to prior years	(101)	(453)	0
Decreases for tax positions related to current year	0	0	0
Settlement with taxing authorities	0	0	0
Expiration of applicable statutes of limitations	0	0	0
Unrecognized income tax benefits	$ 1,272	$ 894	$ 944

Earnings Per Common Share - Rec

Earnings Per Common Share - Reconciliation of Basic and Diluted Net Income Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Net income per consolidated statements of income	$ 32,326	$ 47,136	$ 47,974	$ 38,825	$ 14,691	$ 32,577	$ 28,968	$ 26,117	$ 166,261	$ 102,353	$ 65,774
Net income allocated to participating securities									(197)
Net income allocated to common stock									$ 166,064	$ 102,353	$ 65,774
Weighted average common shares outstanding (Basic)									83,562,109	81,072,945	75,000,000
Weighted average dilutive restricted stock units									813,180	532,070	294,600
Weighted average common shares outstanding (Diluted)									84,375,289	81,605,015	75,294,600
Earnings per common share (Basic)	$ 0.39	$ 0.56	$ 0.57	$ 0.46	$ 0.18	$ 0.39	$ 0.35	$ 0.35	$ 1.99	$ 1.26	$ 0.88
Earnings per common share (Diluted)	$ 0.39	$ 0.56	$ 0.57	$ 0.46	$ 0.17	$ 0.39	$ 0.35	$ 0.35	$ 1.97	$ 1.25	$ 0.87

Employee Benefits - Additional

Employee Benefits - Additional Information (Details) - USD ($)	Jun. 01, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Prior service cost or loss amortization		$ 0
Amount recognized in accumulated other comprehensive income, expected to be recognized as a component of net periodic benefit cost in 2019		$ 20,000
Asset Allocations		100.00%	100.00%
Minimum cash contribution		$ 0	$ 1,300,000	$ 900,000
Amount recognized in compensation expense		$ 154,905,000	139,118,000	125,068,000
2018 Employee Stock Purchase Plan | Common Class A
Defined Benefit Plan Disclosure [Line Items]
Percentage of discount on fair market value of common stock	15.00%	15.00%
Common stock shares issued		40,598
Equity-based compensation expense		$ 205,000
Plan 401 K
Defined Benefit Plan Disclosure [Line Items]
Plan contributions		3,800,000	3,500,000
Plan 401 K | Supplemental Employee Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Accrued liability		1,700,000	1,900,000
Amount recognized in compensation expense		300,000	706,000	322,000
Plan 401 K | Unqualified Supplemental Retirement and Voluntary Deferred Compensation Plan
Defined Benefit Plan Disclosure [Line Items]
Accrued liability		3,100,000	3,200,000
Amount recognized in compensation expense		80,000	47,000	$ 186,000
Deferred compensation		$ 3,100,000	$ 3,200,000
Maximum | 2018 Employee Stock Purchase Plan | Common Class A
Defined Benefit Plan Disclosure [Line Items]
Amount of common stock may be granted	500,000
Scenario, Forecast | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Minimum cash contribution					$ 0
Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Asset Allocations		59.00%	55.00%
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Asset Allocations		40.00%	39.00%
Other Securities
Defined Benefit Plan Disclosure [Line Items]
Asset Allocations		1.00%

Employee Benefits - Defined Ben

Employee Benefits - Defined Benefit Pension Plan's Funded (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 100,000	$ 100,000	$ 100,000
Interest cost	165,000	192,000	221,000
Fair value of plan assets at beginning of period	6,130,000
Employer contributions	0	1,300,000	900,000
Fair value of plan assets at end of year	5,656,000	6,130,000
Expected return on plan assets	(319,000)	(261,000)	(234,000)
Net loss amortization		65,000	53,000
Cost of settlements		45,000	156,000
Net periodic benefit cost	(54,000)	141,000	296,000
Amortization of net actuarial loss		65,000	53,000
Net actuarial gain (loss)	265,000	48,000	(226,000)
Adjustment for settlement		45,000	156,000
Gains (losses) on pension liability	265,000	158,000	(17,000)
Tax effect	(62,000)	(37,000)	4,000
Net unrealized gains (losses) on pension liability	203,000	121,000	(13,000)
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at beginning of period	5,909,000	5,785,000
Service cost	100,000	100,000
Interest cost	165,000	192,000
Actuarial loss (gain)	(797,000)	224,000
Administrative expenses paid	(36,000)	(40,000)
Benefits paid	(225,000)	(77,000)
Settlements		(275,000)
Benefit obligation at end of year	5,116,000	5,909,000	5,785,000
Fair value of plan assets at beginning of period	6,130,000	4,689,000
Return on plan assets	(213,000)	533,000
Employer contributions		1,300,000
Administrative expenses paid	(36,000)	(40,000)
Benefits paid	(225,000)	(77,000)
Settlements		(275,000)
Fair value of plan assets at end of year	5,656,000	6,130,000	$ 4,689,000
Funded status	$ 540,000	$ 221,000

Employee Benefits - Determine B

Employee Benefits - Determine Benefit Obligations and Net Periodic Pension Cost (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Postemployment Benefits [Abstract]
Discount rate	3.92%	3.21%	3.52%
Compensation increase rate	0.00%	0.00%	0.00%
Census date	Jan. 1, 2019	Jan. 1, 2018	Jan. 1, 2017
Expected return on plan assets	5.50%	5.50%	5.50%

Employee Benefits - Schedule of

Employee Benefits - Schedule of Expected Benefit Payments (Details) - Pension Plan $ in Thousands	Dec. 31, 2018USD ($)
Defined Benefit Plan Disclosure [Line Items]
2,019	$ 1,173
2,020	1,262
2,021	298
2,022	249
2,023	497
2024-2028	1,301
Total	$ 4,780

Employee Benefits - Schedule _2

Employee Benefits - Schedule of Defined Benefit Pension Plan Fair Values and Weighted-Average Asset Allocations by Asset Category (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 5,656	$ 6,130
Asset Allocations	100.00%	100.00%
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 2,262	$ 2,382
Asset Allocations	40.00%	39.00%
Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 3,311	$ 3,342
Asset Allocations	59.00%	55.00%
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 83	$ 406
Asset Allocations	1.00%	6.00%

Employee Benefits - Schedule _3

Employee Benefits - Schedule of Projected Benefit Payments (Details) - Plan 401 K $ in Thousands	Dec. 31, 2018USD ($)
Defined Benefit Plan Disclosure [Line Items]
2,019	$ 376
2,020	376
2,021	384
2,022	384
2,023	385
2024-2028	1,903
Total	$ 3,808

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Details) $ in Millions	Dec. 31, 2018USD ($)
Related Party Transaction [Line Items]
Related party deposits	$ 571
State Bank and One Large Deposit Account by Related Third Party
Related Party Transaction [Line Items]
Related party deposits	$ 311

Regulatory Matters - Schedule o

Regulatory Matters - Schedule of Actual Capital Amounts and Ratios (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 leverage	$ 1,209,407	$ 1,096,438
Common equity tier 1 capital	1,172,454	1,058,888
Tier 1 risk-based capital	1,209,407	1,096,438
Total risk-based capital	1,403,311	1,283,561
Tier 1 leverage	479,940	410,770
Common equity tier 1 capital	536,930	450,951
Tier 1 risk-based capital	715,907	601,269
Total risk-based capital	954,542	801,691
Tier 1 risk-based capital	715,907	601,269
Total risk-based capital	$ 1,193,178	$ 1,002,114
Tier 1 leverage	10.10%	10.70%
Common equity tier 1 capital	9.80%	10.60%
Tier 1 risk-based capital	10.10%	10.90%
Total risk-based capital	11.80%	12.80%
Tier 1 leverage	4.00%	4.00%
Common equity tier 1 capital	4.50%	4.50%
Tier 1 risk-based capital	6.00%	6.00%
Total risk-based capital	8.00%	8.00%
Tier 1 risk-based capital	6.00%	6.00%
Total risk-based capital	10.00%	10.00%
Cadence Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 leverage	$ 1,327,974	$ 1,198,234
Common equity tier 1 capital	1,277,974	1,149,181
Tier 1 risk-based capital	1,327,974	1,198,234
Total risk-based capital	1,447,719	1,311,376
Tier 1 leverage	479,667	410,743
Common equity tier 1 capital	536,285	450,874
Tier 1 risk-based capital	715,047	601,165
Total risk-based capital	953,396	801,553
Tier 1 leverage	599,584	513,429
Common equity tier 1 capital	774,634	651,262
Tier 1 risk-based capital	953,396	801,553
Total risk-based capital	$ 1,191,745	$ 1,001,941
Tier 1 leverage	11.10%	11.70%
Common equity tier 1 capital	10.70%	11.50%
Tier 1 risk-based capital	11.10%	12.00%
Total risk-based capital	12.10%	13.10%
Tier 1 leverage	4.00%	4.00%
Common equity tier 1 capital	4.50%	4.50%
Tier 1 risk-based capital	6.00%	6.00%
Total risk-based capital	8.00%	8.00%
Tier 1 leverage	5.00%	5.00%
Common equity tier 1 capital (transitional)	6.50%	6.50%
Tier 1 risk-based capital	8.00%	8.00%
Total risk-based capital	10.00%	10.00%

Regulatory Matters - Additional

Regulatory Matters - Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Banking And Thrift [Abstract]
Reserve requirement with FRB	$ 91.5	$ 70.9

Commitments and Contingent Li_3

Commitments and Contingent Liabilities - Summary of Commitments and Contingent Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Commitments to Grant Loans
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Commitments to grant loans	$ 103,570	$ 522,967
Standby Letters of Credit
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Letters of credit	141,214	101,718
Performance Letters of Credit
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Performance letters of credit	21,026	17,638
Commercial Letters of Credit
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Letters of credit	11,262	11,790
Commitments to Extend Credit
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Commitments to extend credit	$ 4,078,708	$ 3,270,097

Commitments and Contingent Li_4

Commitments and Contingent Liabilities - Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Commitments And Contingencies Disclosure [Abstract]
Unfunded commitments - LLC Investments	$ 37.5	$ 20.3

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information - Summary of Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash paid during the year for:
Interest	$ 120,823	$ 69,289	$ 55,086
Income taxes, net of refunds	40,754	33,268	23,025
Non-cash investing activities (at fair value):
Acquisition of real estate in settlement of loans	3,207	7,023	13,494
Transfers of loans to loans held for sale	$ 36,627	$ 16,206	318,868
Acquisition of net profits interest in settlement of loans			$ 19,104

Disclosure About Fair Values _3

Disclosure About Fair Values of Financial Instruments - Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets
Investment securities available-for-sale	$ 1,187,252	$ 1,257,063
Derivative assets	11,136	3,958
Liabilities
Derivative liabilities	32,350	25,280
Carrying Value
Assets
Investment securities available-for-sale	1,187,252	1,257,063
Equity securities with readily determinable fair values not held for trading	5,840	5,885
Derivative assets	11,136	3,958
Net profits interests	5,779	15,833
Investments in limited partnerships	36,917
Liabilities
Derivative liabilities	32,350	25,280
Level 1
Assets
Equity securities with readily determinable fair values not held for trading	5,840	5,885
Level 2
Assets
Investment securities available-for-sale	1,187,252	1,257,063
Derivative assets	11,136	3,958
Liabilities
Derivative liabilities	32,350	25,280
Level 3
Assets
Net profits interests	5,779	15,833
Investments in limited partnerships	36,917
Fair Value, Measurements, Recurring | Carrying Value
Assets
Investment securities available-for-sale	1,187,252	1,257,063
Equity securities with readily determinable fair values not held for trading	5,840	5,885
Derivative assets	11,136	3,958
Net profits interests	5,779	15,833
Investments in limited partnerships	11,191
Total recurring basis measured assets	1,221,198	1,282,739
Liabilities
Derivative liabilities	32,350	25,280
Total recurring basis measured liabilities	32,350	25,280
Fair Value, Measurements, Recurring | Level 1
Assets
Equity securities with readily determinable fair values not held for trading	5,840	5,885
Total recurring basis measured assets	5,840	5,885
Fair Value, Measurements, Recurring | Level 2
Assets
Investment securities available-for-sale	1,187,252	1,257,063
Derivative assets	11,136	3,958
Total recurring basis measured assets	1,198,388	1,261,021
Liabilities
Derivative liabilities	32,350	25,280
Total recurring basis measured liabilities	32,350	25,280
Fair Value, Measurements, Recurring | Level 3
Assets
Net profits interests	5,779	15,833
Investments in limited partnerships	11,191
Total recurring basis measured assets	$ 16,970	$ 15,833

Disclosure About Fair Values _4

Disclosure About Fair Values of Financial Instruments - Summary of Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jan. 01, 2018	Dec. 31, 2018	Dec. 31, 2017
ASU 2016-01
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Adjustment recorded in retained earnings due to adoption of ASU 2016-01	$ 1,000
Fair Value, Measurements, Recurring | Net Profits Interests
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 15,833	$ 15,833	$ 19,425
Sales proceeds		(5,308)
Net (losses) gains included in earnings		(3,177)	(2,442)
Distributions received		(1,569)	(1,150)
Ending Balance		5,779	15,833
Net unrealized (losses) gains included in earnings relating to assets held at the end of the period		(2,818)	$ (2,442)
Fair Value, Measurements, Recurring | Investments in Limited Partnerships
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Net (losses) gains included in earnings		2,457
Contributions paid		3,807
Distributions received		(1,403)
Ending Balance		11,191
Net unrealized (losses) gains included in earnings relating to assets held at the end of the period		2,457
Fair Value, Measurements, Recurring | Investments in Limited Partnerships | ASU 2016-01
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Transfers in due to adoption of ASU 2016-01		5,129
Adjustment recorded in retained earnings due to adoption of ASU 2016-01		$ 1,201

Disclosure About Fair Values _5

Disclosure About Fair Values of Financial Instruments - Additional Information (Details)	12 Months Ended
	Dec. 31, 2018
Fair value inputs, increase (decrease) in discount rate	5.00%
Discounted Cash Flow | Net Recoverable Oil and Gas Reserves and Forward Looking Commodity Prices
Fair value inputs, discount rate	10.00%

Disclosure About Fair Values _6

Disclosure About Fair Values of Financial Instruments - Summary of Assets Recorded at Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Impaired loans, net of specific allowance	$ 249,133	$ 278,587
Other real estate	2,406	7,605
Level 2
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Loans held for sale	59,461	61,359
Fair Value, Nonrecurring
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Loans held for sale	59,461	61,359
Impaired loans, net of specific allowance	71,741	65,088
Other real estate	2,406	7,605
Total assets measured on a nonrecurring basis	133,608	134,052
Fair Value, Nonrecurring | Level 2
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Loans held for sale	59,461	61,359
Total assets measured on a nonrecurring basis	59,461	61,359
Fair Value, Nonrecurring | Level 3
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Impaired loans, net of specific allowance	71,741	65,088
Other real estate	2,406	7,605
Total assets measured on a nonrecurring basis	$ 74,147	$ 72,693

Disclosure About Fair Values _7

Disclosure About Fair Values of Financial Instruments - Summary of Significant Unobservable Inputs Used in Level 3 Fair Value Measurements for Financial Assets Measured at Fair Value On a Nonrecurring Basis (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017
Discounted Cash Flow | Net Recoverable Oil and Gas Reserves and Forward Looking Commodity Prices
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value inputs, discount rate		10.00%
Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable Inputs		Estimated closing costs
Range		10.00%
Level 3 | Impaired Loans Net Of Specific Allowance
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Carrying Value		$ 71,741		$ 65,088
Valuation Methods		Appraised value, as adjusted		Appraised value, as adjusted
Unobservable Inputs		Discount to fair value		Discount to fair value
Level 3 | Impaired Loans Net Of Specific Allowance | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range		20.00%		50.00%
Level 3 | Impaired Loans Net Of Specific Allowance | Minimum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range		0.00%		0.00%
Level 3 | Discounted Cash Flow
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation Methods		Discounted cash flow		Discounted cash flow
Unobservable Inputs		Discount rates - 2.9% to 8.7%		Discount rates - 3.6% to 8.0%
Level 3 | Discounted Cash Flow | Net Recoverable Oil and Gas Reserves and Forward Looking Commodity Prices
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation Methods		Discounted cash flow		Discounted cash flow
Unobservable Inputs		Net recoverable oil and gas reserves and forward-looking commodity prices. Discount rate - 10%		Net recoverable oil and gas reserves and forward-looking commodity prices. Discount rate - 9%
Fair value inputs, discount rate		10.00%		9.00%
Level 3 | Discounted Cash Flow | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range		20.00%	[1]	1.00%	[2]
Fair value inputs, discount rate		8.70%		8.00%
Level 3 | Discounted Cash Flow | Maximum | Net Recoverable Oil and Gas Reserves and Forward Looking Commodity Prices
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range		10.00%		29.00%	[2]
Level 3 | Discounted Cash Flow | Minimum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range		10.00%	[1]	0.00%	[2]
Fair value inputs, discount rate		2.90%		3.80%
Level 3 | Discounted Cash Flow | Minimum [Member] | Net Recoverable Oil and Gas Reserves and Forward Looking Commodity Prices
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range		0.00%		0.00%	[2]
Level 3 | Enterprise Value
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation Methods		Enterprise value
Unobservable Inputs		Exit multiples
Level 3 | Enterprise Value | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value measurements, percentage of enterprise value	[1]	15.00%
Level 3 | Enterprise Value | Minimum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value measurements, percentage of enterprise value	[1]	0.00%
Level 3 | Discount of Fair Value | Other
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Carrying Value		$ 2,406		$ 7,605
Valuation Methods		Appraised value, as adjusted		Appraised value, as adjusted
Unobservable Inputs		Discount to fair value		Discount of fair value
Level 3 | Discount of Fair Value | Other | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range		20.00%		20.00%
Level 3 | Discount of Fair Value | Other | Minimum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range		0.00%		0.00%
Level 3 | Estimated Closing Costs
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable Inputs		Estimated closing costs		Estimated closing costs
Range		10.00%		10.00%
[1]	Represents difference of unpaid balance to fair value.
[2]	Represents fair value as a percent of the unpaid principal balance.

Disclosure About Fair Values _8

Disclosure About Fair Values of Financial Instruments - Summary of Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financial Assets:
Interest-bearing deposits with banks	$ 523,436	$ 482,568
Federal funds sold	18,502	9,536
Investment securities available-for-sale	1,187,252	1,257,063
Derivative assets	11,136	3,958
Investment securities available-for-sale	1,187,252	1,257,063
Estimated fair value of held-to-maturity securities		311
Financial Liabilities:
Advances from FHLB	150,000	150,000
Securities sold under agreements to repurchase	1,106	1,026
Senior debt	184,801	184,629
Subordinated debt	98,910	98,687
Junior subordinated debentures	36,953	36,472
Derivative liabilities	32,350	25,280
Level 1
Financial Assets:
Cash and due from banks	237,342	238,707
Interest-bearing deposits with banks	523,436	482,568
Federal funds sold	18,502	9,536
Equity securities with readily determinable fair values not held for trading	5,840	5,885
Level 2
Financial Assets:
Investment securities available-for-sale	1,187,252	1,257,063
Loans held for sale	59,461	61,359
Derivative assets	11,136	3,958
Investment securities available-for-sale	1,187,252	1,257,063
Estimated fair value of held-to-maturity securities		311
Financial Liabilities:
Deposits	10,700,350	9,006,890
Advances from FHLB	150,000	150,000
Securities sold under agreements to repurchase	1,106	1,026
Senior debt	194,762	194,484
Subordinated debt	103,008	94,724
Junior subordinated debentures	46,946	49,161
Derivative liabilities	32,350	25,280
Level 3
Financial Assets:
Net loans	9,735,130	8,134,903
Net profits interests	5,779	15,833
Investments in limited partnerships	36,917
Carrying Value
Financial Assets:
Cash and due from banks	237,342	238,707
Interest-bearing deposits with banks	523,436	482,568
Federal funds sold	18,502	9,536
Investment securities available-for-sale	1,187,252	1,257,063
Equity securities with readily determinable fair values not held for trading	5,840	5,885
Loans held for sale	59,461	61,359
Net loans	9,959,545	8,165,851
Derivative assets	11,136	3,958
Net profits interests	5,779	15,833
Investments in limited partnerships	36,917
Investment securities available-for-sale	1,187,252	1,257,063
Estimated fair value of held-to-maturity securities		290
Financial Liabilities:
Deposits	10,708,689	9,011,515
Advances from FHLB	150,000	150,000
Securities sold under agreements to repurchase	1,106	1,026
Senior debt	184,801	184,629
Subordinated debt	98,910	98,687
Junior subordinated debentures	36,953	36,472
Derivative liabilities	32,350	25,280
Fair Value
Financial Assets:
Cash and due from banks	237,342	238,707
Interest-bearing deposits with banks	523,436	482,568
Federal funds sold	18,502	9,536
Investment securities available-for-sale	1,187,252	1,257,063
Equity securities with readily determinable fair values not held for trading	5,840	5,885
Loans held for sale	59,461	61,359
Net loans	9,735,130	8,134,903
Derivative assets	11,136	3,958
Net profits interests	5,779	15,833
Investments in limited partnerships	36,917
Investment securities available-for-sale	1,187,252	1,257,063
Estimated fair value of held-to-maturity securities		311
Financial Liabilities:
Deposits	10,700,350	9,006,890
Advances from FHLB	150,000	150,000
Securities sold under agreements to repurchase	1,106	1,026
Senior debt	194,762	194,484
Subordinated debt	103,008	94,724
Junior subordinated debentures	46,946	49,161
Derivative liabilities	$ 32,350	$ 25,280

Variable Interest Entities an_3

Variable Interest Entities and Other Investments - Additional Information (Details)	3 Months Ended	12 Months Ended
	Dec. 31, 2018USD ($)	Dec. 31, 2018USD ($)Customer	Dec. 31, 2017USD ($)	Dec. 31, 2016Customer
Variable Interest Entities and Other Investments [Line Items]
Equity method investments	$ 8,714,000	$ 8,714,000	$ 8,856,000
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entities and Other Investments [Line Items]
Cost method investments	11,200,000	11,200,000
Gain recognized from assets at fair value		2,500,000
Equity method investments	8,700,000	8,700,000
Total marketable equity securities	5,800,000	$ 5,800,000	5,900,000
Proceeds from sale of previously owned net profit interest	5,300,000
Number of loan customers | Customer				2
Number of loan customers sold | Customer		1
Net Profits interest	5,800,000	$ 5,800,000	15,800,000
Variable Interest Entity, Not Primary Beneficiary | Rabbi Trust
Variable Interest Entities and Other Investments [Line Items]
Defined rabbi trust assets and benefit obligation	3,600,000	3,600,000	3,600,000
Variable Interest Entity, Not Primary Beneficiary | ASU 2016-01
Variable Interest Entities and Other Investments [Line Items]
Cost method investments			14,000,000
Variable Interest Entity, Not Primary Beneficiary | Limited Partner
Variable Interest Entities and Other Investments [Line Items]
Equity method investments	9,200,000	9,200,000	8,800,000
Variable Interest Entity, Not Primary Beneficiary | Other Assets
Variable Interest Entities and Other Investments [Line Items]
Investments in affordable Housing Project	$ 7,800,000	$ 7,800,000	$ 7,900,000

Variable Interest Entities an_4

Variable Interest Entities and Other Investments - Summary of Investment in Limited Partnerships Subsequent to Adoption of ASU 2016-01 (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Variable Interest Entities and Other Investments [Line Items]
Equity method investments	$ 8,714	$ 8,856
Investments in Limited Partnerships
Variable Interest Entities and Other Investments [Line Items]
Affordable housing projects (amortized cost)	7,803
Limited partnerships accounted for under the fair value practical expedient of NAV	11,191
Limited partnerships without readily determinable fair values that do not qualify for the practical expedient of NAV accounted for under the cost method	8,714
Equity method investments	9,209
Total investments in limited partnerships	$ 36,917

Variable Interest Entities an_5

Variable Interest Entities and Other Investments - Summary of Carrying Amount of Equity Investments Measured Under Measurement Alternative from Observable Transactions (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)
Variable Interest Entities And Other Investments [Abstract]
Carrying value, December 31, 2017	$ 8,856
Distributions	(1,109)
Contributions	967
Carrying value, December 31, 2018	$ 8,714

Segment Reporting - Additional

Segment Reporting - Additional Information (Details)	12 Months Ended
	Dec. 31, 2018Segment
Segment Reporting [Abstract]
Number of operating segments	3

Segment Reporting - Summary of

Segment Reporting - Summary of Operating Results of Segments (Details) - USD ($) $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2017		Sep. 30, 2017		Jun. 30, 2017		Mar. 31, 2017		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net interest income (expense)	$ 103,146		$ 98,100		$ 95,384		$ 91,111		$ 87,911		$ 81,163		$ 82,384		$ 74,758		$ 387,741	$ 326,216	$ 279,439
Provision for credit losses	8,422		(1,365)		1,263		4,380		(4,475)		1,723		6,701		5,786		12,700	9,735	49,348
Noninterest income	21,007	[1]	23,976	[1]	24,672	[1]	24,983	[1]	25,656	[2]	27,124	[2]	22,989	[2]	24,105	[2]	94,638	99,874	88,403
Noninterest expense	72,696		61,231		62,435		61,939		66,371		56,530		56,134		54,321		258,301	233,356	220,180
Income tax expense (benefit)	10,709		15,074		8,384		10,950		36,980		17,457		13,570		12,639		45,117	80,646	32,540
Net income	32,326		$ 47,136		$ 47,974		$ 38,825		14,691		$ 32,577		$ 28,968		$ 26,117		166,261	102,353	65,774
Total assets	12,730,285								10,948,926								12,730,285	10,948,926
Banking
Segment Reporting Information [Line Items]
Net interest income (expense)																	407,674	344,987	297,701
Provision for credit losses																	12,700	9,735	49,348
Noninterest income																	47,316	51,286	45,499
Noninterest expense																	215,574	194,212	186,874
Income tax expense (benefit)																	52,464	88,417	37,442
Net income																	174,252	103,909	69,536
Total assets	12,622,287								10,854,206								12,622,287	10,854,206
Financial Services
Segment Reporting Information [Line Items]
Net interest income (expense)																	(2,307)	(1,347)	(201)
Noninterest income																	46,805	47,956	42,727
Noninterest expense																	35,679	36,178	32,334
Income tax expense (benefit)																	3,979	2,000	3,567
Net income																	4,840	8,431	6,625
Total assets	94,618								90,639								94,618	90,639
Corporate
Segment Reporting Information [Line Items]
Net interest income (expense)																	(17,626)	(17,424)	(18,061)
Noninterest income																	517	632	177
Noninterest expense																	7,048	2,966	972
Income tax expense (benefit)																	(11,326)	(9,771)	(8,469)
Net income																	(12,831)	(9,987)	$ (10,387)
Total assets	$ 13,380								$ 4,081								$ 13,380	$ 4,081
[1]	Includes net securities gains (losses) of $(54) thousand, $2 thousand, $(1.8) million and $12 thousand during the fourth, third, second and first quarters of 2018, respectively.
[2]	Includes net securities gains (losses) of $16 thousand, $1 thousand, $(244) thousand and $81 thousand during the fourth, third, second and first quarters of 2017, respectively

Equity-based Compensation - Add

Equity-based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	Oct. 01, 2018	Apr. 02, 2018	Jul. 21, 2015	Nov. 30, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock granted			258,375	395,250	276,451		277,500
Restricted stock cancelled				258,375
Stock units granted, new grantees				277,500
Equity-based compensation expense					$ 3,700	$ 1,700	$ 117
Remaining expense related to unvested restricted stock units					$ 5,300
Expense recognition period					27 months
Number of shares outstanding, non-vested					275,744	672,750	672,750	672,750	258,375
Fair value per unit at weighted average grant date, non-vested					$ 26.49	$ 5.14	$ 5.14	$ 13.43
Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock shares available for grant					7,500,000
Shares of common stock remain available for future grants					7,224,256
2018 Employee Stock Purchase Plan | Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock granted		270,105
Additional Restricted stock granted	6,346
2018 Employee Stock Purchase Plan | Restricted Stock Units | Half of Units Granted
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period, options		3 years
2018 Employee Stock Purchase Plan | Restricted Stock Units | Remaining Half of Units Granted
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period, options		3 years
Award vesting rights					The remaining half of the restricted stock units vest equally on March 31 of each of the next three years.
2018 Employee Stock Purchase Plan | Restricted Stock Units | Minimum [Member] | Half of Units Granted
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting rights, percentage		0.00%
2018 Employee Stock Purchase Plan | Restricted Stock Units | Maximum | Half of Units Granted
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting rights, percentage		200.00%

Equity-based Compensation - Sum

Equity-based Compensation - Summary of Activity Related to Restricted Stock Unit Awards (Details) - Restricted Stock Units - $ / shares	Jul. 21, 2015	Nov. 30, 2016	Dec. 31, 2018	Dec. 31, 2016
Number of shares, Non-vested at beginning of period			672,750	672,750
Number of shares, Units deemed improbable to vest				(258,375)
Number of shares, Expired during the period			(672,750)
Number of shares, Amended grants				395,250
Number of shares, Forfeited during the period			(707)
Restricted stock granted	258,375	395,250	276,451	277,500
Number of shares, Non-vested at end of period			275,744	672,750
Fair value per unit at award date, Non-vested at beginning of period			$ 5.14	$ 13.43
Fair value per unit at award date, Units deemed improbable to vest				13.43
Fair value per unit at award date, Expired during the period			5.14
Fair value per unit at award date, Amended grants				5.14
Fair value per unit at award date, Expired during the period			26.50
Fair value per unit at award date, Granted during the period			26.49	5.14
Fair value per unit at award date, Non-vested at end of period			$ 26.49	$ 5.14

Condensed Financial Informati_3

Condensed Financial Information of Cadence Bancorporation (Parent Only) - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
ASSETS
Cash and due from banks	$ 237,342	$ 238,707
Interest-bearing deposits with banks	523,436	482,568
Other assets	170,494	145,544
Total Assets	12,730,285	10,948,926
Liabilities:
Senior debt	184,801	184,629
Subordinated debt	98,910	98,687
Junior subordinated debentures	36,953	36,472
Other liabilities	111,552	107,541
Total liabilities	11,292,011	9,589,870
Shareholder’s Equity:
Common stock	836	836
Additional paid-in capital	1,041,000	1,037,040
Treasury stock	(22,010)
Retained earnings	461,360	340,213
Accumulated other comprehensive loss	(42,912)	(19,033)
Total shareholders' equity	1,438,274	1,359,056	$ 1,080,498	$ 1,054,208
Total Liabilities and Shareholders' Equity	12,730,285	10,948,926
Cadence Bancorporation
ASSETS
Cash and due from banks	985	494
Interest-bearing deposits with banks	114,871	150,587
Investment in consolidated bank subsidiary	1,593,469	1,488,223
Investment in consolidated nonbank subsidiary	16,787	16,008
Other assets	15,126	3,587
Total Assets	1,741,238	1,658,899
Liabilities:
Interest payable	818	813
Senior debt	184,801	184,629
Subordinated debt	74,158	73,982
Junior subordinated debentures	36,953	36,472
Other liabilities	6,234	3,947
Total liabilities	302,964	299,843
Shareholder’s Equity:
Common stock	836	836
Additional paid-in capital	1,041,000	1,037,040
Treasury stock	(22,010)
Retained earnings	461,360	340,213
Accumulated other comprehensive loss	(42,912)	(19,033)
Total shareholders' equity	1,438,274	1,359,056
Total Liabilities and Shareholders' Equity	$ 1,741,238	$ 1,658,899

Condensed Financial Informati_4

Condensed Financial Information of Cadence Bancorporation (Parent Only) - Condensed Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
INCOME
Interest income	$ 143,857	$ 131,753	$ 123,963	$ 113,093	$ 108,370	$ 99,503	$ 99,375	$ 89,619	$ 512,666	$ 396,867	$ 335,250
Other income									18,111	24,656	17,678
EXPENSES
Interest expense	40,711	33,653	28,579	21,982	20,459	18,340	16,991	14,861	124,925	70,651	55,811
Other expenses									67,180	60,665	60,598
Income before income taxes	43,035	62,210	56,358	49,775	51,671	50,034	42,538	38,756	211,378	182,999	98,314
Income tax expense (benefit)	10,709	15,074	8,384	10,950	36,980	17,457	13,570	12,639	45,117	80,646	32,540
Net income	$ 32,326	$ 47,136	$ 47,974	$ 38,825	$ 14,691	$ 32,577	$ 28,968	$ 26,117	166,261	102,353	65,774
Cadence Bancorporation
INCOME
Dividends from bank subsidiary									59,494	11,000	13,500
Interest income									73	65	25
Other income									516	632	176
Total income									60,083	11,697	13,701
EXPENSES
Interest expense									17,626	17,424	18,060
Other expenses									7,048	3,305	2,092
Total expenses									24,674	20,729	20,152
Income (loss) before income taxes and equity in undistributed income of subsidiaries									35,409	(9,032)	(6,451)
Equity in undistributed income of subsidiaries									125,727	103,390	64,424
Income before income taxes									161,136	94,358	57,973
Income tax expense (benefit)									(5,125)	(7,995)	(7,801)
Net income									$ 166,261	$ 102,353	$ 65,774

Condensed Financial Informati_5

Condensed Financial Information of Cadence Bancorporation (Parent Only) - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 32,326	$ 47,136	$ 47,974	$ 38,825	$ 14,691	$ 32,577	$ 28,968	$ 26,117	$ 166,261	$ 102,353	$ 65,774
Adjustments to reconcile net income to net cash provided by operations:
Deferred income tax expense									4,464	44,388	5,980
(Increase) decrease in other assets									(21,644)	4,079	(11,685)
Increase (decrease) in other liabilities									1,610	18,078	1,011
Net cash flows provided by operating activities									191,169	144,698	118,013
CASH FLOWS FROM INVESTING ACTIVITIES
Net cash used in investing activities									(1,771,949)	(951,103)	(993,358)
CASH FLOWS FROM FINANCING ACTIVITIES
Purchase of senior debt										(9,600)	(78)
Proceeds from issuance of common stock										155,581
Cash dividends paid on common stock									(45,995)
Repurchase of common stock									(22,010)
Net cash provided by financing activities									1,629,249	1,288,291	657,063
Net increase (decrease) in cash and cash equivalents									48,469	481,886	(218,282)
Cash and cash equivalents at beginning of period				730,811				248,925	730,811	248,925	467,207
Cash and cash equivalents at end of period	779,280				730,811				779,280	730,811	248,925
Cadence Bancorporation
CASH FLOWS FROM OPERATING ACTIVITIES
Net income									166,261	102,353	65,774
Adjustments to reconcile net income to net cash provided by operations:
Deferred income tax expense									358	1,084	(1,598)
Equity in undistributed income of subsidiaries									(125,727)	(103,390)	(64,424)
(Increase) decrease in other assets									(10,143)	3,892	3,043
Increase (decrease) in interest payable									5	3	(102)
Increase (decrease) in other liabilities									2,151	891	(504)
Net cash flows provided by operating activities									32,905	4,833	2,189
CASH FLOWS FROM INVESTING ACTIVITIES
Capital contributions to bank subsidiary										(50,000)
(Increase) decrease in limited partnership investments									(125)	(63)	463
Net cash used in investing activities									(125)	(50,063)	463
CASH FLOWS FROM FINANCING ACTIVITIES
Purchase of senior debt										(9,600)	(78)
Proceeds from issuance of common stock										155,581
Cash dividends paid on common stock									(45,995)
Repurchase of common stock									(22,010)
Net cash provided by financing activities									(68,005)	145,981	(78)
Net increase (decrease) in cash and cash equivalents									(35,225)	100,751	2,574
Cash and cash equivalents at beginning of period				$ 151,081				$ 50,330	151,081	50,330	47,756
Cash and cash equivalents at end of period	$ 115,856				$ 151,081				$ 115,856	$ 151,081	$ 50,330

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	$ 1,359,056	$ 1,080,498	$ 1,054,208
Net change	(23,879)	18,744	(39,571)
Balance	1,438,274	1,359,056	1,080,498
Unrealized Gains (Losses) on Securities Available for Sale
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(2,160)	(21,819)	5,901
Net change	(22,119)	21,605	(27,720)
Reclassification of amounts within AOCI to retained earnings due to tax reform		(1,946)
Balance	(24,279)	(2,160)	(21,819)
Unrealized Gains (Losses) on Defined Benefit Pension Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(531)	(500)	(487)
Net change	203	121	(13)
Reclassification of amounts within AOCI to retained earnings due to tax reform		(152)
Balance	(328)	(531)	(500)
Unrealized Gains (Losses) on Derivative Instruments Designated as Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(16,342)	(10,212)	1,626
Net change	(1,963)	(2,982)	(11,838)
Reclassification of amounts within AOCI to retained earnings due to tax reform		(3,148)
Balance	(18,305)	(16,342)	(10,212)
Accumulated OCI
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(19,033)	(32,531)	7,040
Net change	(23,879)	18,744	(39,571)
Reclassification of amounts within AOCI to retained earnings due to tax reform		(5,246)
Balance	$ (42,912)	$ (19,033)	$ (32,531)

Quarterly Results of Operatio_3

Quarterly Results of Operations (Unaudited) - Summary of Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2017		Sep. 30, 2017		Jun. 30, 2017		Mar. 31, 2017		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Interest income	$ 143,857		$ 131,753		$ 123,963		$ 113,093		$ 108,370		$ 99,503		$ 99,375		$ 89,619		$ 512,666	$ 396,867	$ 335,250
Interest expense	40,711		33,653		28,579		21,982		20,459		18,340		16,991		14,861		124,925	70,651	55,811
Net interest income	103,146		98,100		95,384		91,111		87,911		81,163		82,384		74,758		387,741	326,216	279,439
Provision for credit losses	8,422		(1,365)		1,263		4,380		(4,475)		1,723		6,701		5,786		12,700	9,735	49,348
Noninterest income	21,007	[1]	23,976	[1]	24,672	[1]	24,983	[1]	25,656	[2]	27,124	[2]	22,989	[2]	24,105	[2]	94,638	99,874	88,403
Noninterest expense	72,696		61,231		62,435		61,939		66,371		56,530		56,134		54,321		258,301	233,356	220,180
Income before income taxes	43,035		62,210		56,358		49,775		51,671		50,034		42,538		38,756		211,378	182,999	98,314
Provision for income taxes	10,709		15,074		8,384		10,950		36,980		17,457		13,570		12,639		45,117	80,646	32,540
Net income	$ 32,326		$ 47,136		$ 47,974		$ 38,825		$ 14,691		$ 32,577		$ 28,968		$ 26,117		$ 166,261	$ 102,353	$ 65,774
Earnings per common share (Basic)	$ 0.39		$ 0.56		$ 0.57		$ 0.46		$ 0.18		$ 0.39		$ 0.35		$ 0.35		$ 1.99	$ 1.26	$ 0.88
Earnings per common share (Diluted)	$ 0.39		$ 0.56		$ 0.57		$ 0.46		$ 0.17		$ 0.39		$ 0.35		$ 0.35		$ 1.97	$ 1.25	$ 0.87
[1]	Includes net securities gains (losses) of $(54) thousand, $2 thousand, $(1.8) million and $12 thousand during the fourth, third, second and first quarters of 2018, respectively.
[2]	Includes net securities gains (losses) of $16 thousand, $1 thousand, $(244) thousand and $81 thousand during the fourth, third, second and first quarters of 2017, respectively

Quarterly Results of Operatio_4

Quarterly Results of Operations (Unaudited) - Summary of Quarterly Results of Operations (Parenthetical) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Securities (losses) gains, net	$ (54)	$ 2	$ (1,800)	$ 12	$ 16	$ 1	$ (244)	$ 81	$ (1,853)	$ (146)	$ 3,736