Cadence Bancorporation 10-Q 9 Nov 20 2020 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Nov. 06, 2020
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Trading Symbol	CADE
Entity Registrant Name	Cadence Bancorporation
Entity Central Index Key	0001614184
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Current Reporting Status	Yes
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity File Number	001-38058
Entity Tax Identification Number	47-1329858
Entity Address, Address Line One	2800 Post Oak Boulevard
Entity Address, Address Line Two	Suite 3800
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77056
City Area Code	713
Local Phone Number	871-4000
Entity Common Stock, Shares Outstanding		125,978,531
Entity Interactive Data Current	Yes
Title of 12(b) Security	Class A Common Stock
Security Exchange Name	NYSE
Entity Incorporation, State or Country Code	DE
Document Quarterly Report	true
Document Transition Report	false

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
ASSETS
Cash and due from banks	$ 174,549	$ 252,447
Interest-bearing deposits with banks	1,067,258	725,343
Federal funds sold	5,365	10,974
Total cash and cash equivalents	1,247,172	988,764
Investment securities available-for-sale, amortized cost of $3,006,688 and allowance for credit losses of zero at September 30, 2020	3,088,699	2,368,592
FRB and FHLB stock	77,153	76,752
Loans held for sale	54,100	87,649
Loans, net of unearned income	13,465,556	12,983,655
Less: allowance for credit losses	(385,412)	(119,643)
Net loans	13,080,144	12,864,012
Premises and equipment, net	125,297	127,867
Cash surrender value of life insurance	186,397	183,400
Net deferred tax asset	71,337
Goodwill	43,061	485,336
Other intangible assets, net	88,944	105,613
Other assets	341,891	512,244
Total assets	18,404,195	17,800,229
Liabilities:
Noninterest-bearing deposits	5,033,338	3,833,704
Interest-bearing deposits	10,752,883	10,909,090
Total deposits	15,786,221	14,742,794
Federal Home Loan Bank advances	100,000	100,000
Senior debt	49,978	49,938
Subordinated debt	183,243	182,712
Junior subordinated debentures	37,542	37,445
Notes payable	1,683	2,078
Net deferred tax liability		24,982
Other liabilities	174,056	199,434
Total liabilities	16,332,723	15,339,383
Shareholders' equity:
Common stock $0.01 par value, authorized 300,000,000 shares; 133,183,160 shares issued and 125,946,793 shares outstanding at September 30, 2020 and 132,984,756 shares issued and 127,597,569 shares outstanding at December 31, 2019	1,332	1,330
Additional paid-in capital	1,877,627	1,873,063
Treasury stock, at cost; 7,236,367 shares and 5,387,187 shares, respectively	(130,890)	(100,752)
Retained earnings	68,700	572,503
Accumulated other comprehensive income	254,703	114,702
Total shareholders' equity	2,071,472	2,460,846
Total liabilities and shareholders' equity	$ 18,404,195	$ 17,800,229

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Statement Of Financial Position [Abstract]
Available-for-sale securities, Amortized cost	$ 3,006,688	$ 2,345,791
Allowance for credit losses	$ 0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	133,183,160	132,984,756
Common Stock, Shares, Outstanding	125,946,793	127,597,569
Treasury stock, shares outstanding	7,236,367	5,387,187

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
INTEREST INCOME
Interest and fees on loans	$ 154,851	$ 197,970	$ 492,840	$ 605,732
Interest and dividends on securities:
Taxable	13,164	9,657	39,386	30,751
Tax-exempt	1,699	1,495	4,665	4,861
Other interest income	783	4,027	3,536	11,114
Total interest income	170,497	213,149	540,427	652,458
INTEREST EXPENSE
Interest on time deposits	7,741	17,083	30,936	54,567
Interest on other deposits	4,822	31,338	34,497	91,262
Interest on borrowed funds	3,892	4,541	12,769	16,365
Total interest expense	16,455	52,962	78,202	162,194
Net interest income	154,042	160,187	462,225	490,264
Provision for credit losses	32,973	43,764	275,213	83,901
Net interest income after provision for credit losses	121,069	116,423	187,012	406,363
NONINTEREST INCOME
Investment advisory revenue	6,797	6,532	18,907	17,971
Trust services revenue	4,556	4,440	13,464	13,353
Credit related fees	4,202	5,960	14,586	16,171
Service charges on deposit accounts	5,847	5,462	17,115	15,322
Bankcard fees	1,745	2,061	5,419	6,553
Payroll processing revenue	1,255	1,196	3,764	3,776
SBA income	3,037	2,216	6,280	5,079
Other service fees	1,450	1,700	4,890	5,711
Securities gains, net	79	775	5,359	1,701
Other income	3,623	4,300	7,826	11,390
Total noninterest income	32,591	34,642	97,610	97,027
NONINTEREST EXPENSE
Salaries and employee benefits	51,734	51,904	147,699	159,035
Premises and equipment	10,716	10,913	32,159	33,019
Merger related expenses	2,105	1,010	3,386	27,572
Goodwill impairment			443,695
Intangible asset amortization	5,299	6,025	16,363	17,986
Other expense	25,005	24,431	77,831	70,640
Total noninterest expense	94,859	94,283	721,133	308,252
Income (loss) before income taxes	58,801	56,782	(436,511)	195,138
Income tax expense (benefit)	9,486	12,796	(30,401)	44,605
Net income (loss)	$ 49,315	$ 43,986	$ (406,110)	$ 150,533
Weighted average common shares outstanding (Basic)	125,956,714	128,457,491	126,169,823	129,237,553
Weighted average common shares outstanding (Diluted)	126,094,868	128,515,274	126,169,823	129,359,287
Earnings (loss) per common share (Basic)	$ 0.39	$ 0.34	$ (3.22)	$ 1.16
Earnings (loss) per common share (Diluted)	$ 0.39	$ 0.34	$ (3.22)	$ 1.16

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 49,315	$ 43,986	$ (406,110)	$ 150,533
Unrealized gains (losses) on securities available-for-sale:
Net unrealized gains (losses), net of income taxes of $(1,200), $2,426, $15,451, and $14,826	(3,861)	8,081	49,096	49,382
Less reclassification adjustments for gains realized in net income, net of income taxes of $19, $179, $1,271, and $393	60	596	4,088	1,308
Net change in unrealized gains (losses) on securities available-for-sale, net of tax	(3,921)	7,485	45,008	48,074
Unrealized gains (losses) on derivative instruments designated as cash flow hedges:
Net unrealized gains, net of income taxes of $65, $10,868, $41,944, and $43,260	210	30,927	129,611	144,093
Less reclassification adjustments for gains (losses) realized in net income, net of income taxes of $4,664, $344, $10,894, and $(345)	15,046	1,141	34,618	(1,150)
Net change in unrealized gains (losses) on derivative instruments, net of tax	(14,836)	29,786	94,993	145,243
Other comprehensive (loss) income, net of tax	(18,757)	37,271	140,001	193,317
Comprehensive income (loss)	$ 30,558	$ 81,257	$ (266,109)	$ 343,850

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net unrealized gains (losses) on securities available-for-sale, taxes	$ (1,200)	$ 2,426	$ 15,451	$ 14,826
Reclassification adjustments for gains on securities available-for-sale realized in net income, taxes	19	179	1,271	393
Net unrealized gains on derivative instruments designated as cash flow hedges, taxes	65	10,868	41,944	43,260
Reclassification adjustments for gains (losses) on derivative instruments designated as cash flow hedges realized in net income, taxes	$ 4,664	$ 344	$ 10,894	$ (345)

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Class A Common Shares Outstanding	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Retained EarningsCumulative Effect, Period of Adoption, Adjustment	Accumulated OCI
Balance at Dec. 31, 2018	$ 1,438,274			$ 836	$ 1,041,000	$ (22,010)	$ 461,360		$ (42,912)
Balance, Shares at Dec. 31, 2018			82,497
Net income (loss)	58,201						58,201
Equity-based compensation cost	1,188				1,188
Cash dividends declared	(22,727)						(22,727)
Dividend equivalents on restricted stock units	(125)						(125)
Purchase of treasury stock, at cost	(58,830)					(58,830)
Purchase of treasury stock, at cost, Shares			(3,002)
Issuance of common shares for State Bank acquisition	826,113			492	825,621
Issuance of common shares for State Bank acquisition, Shares			49,232
Value of stock warrants assumed from State Bank	251				251
Common stock issuance costs	(295)				(295)
Issuance of common shares for restricted stock unit vesting				1	(1)
Issuance of common shares for restricted stock unit vesting, Shares			35
Issuance of treasury stock shares for exercise of stock warrants					(7)	7
Other comprehensive income (loss)	60,773								60,773
Balance at Mar. 31, 2019	2,302,823			1,329	1,867,757	(80,833)	496,709		17,861
Balance, Shares at Mar. 31, 2019			128,762
Balance at Dec. 31, 2018	1,438,274			836	1,041,000	(22,010)	461,360		(42,912)
Balance, Shares at Dec. 31, 2018			82,497
Net income (loss)	150,533
Other comprehensive income (loss)	193,317								193,317
Balance at Sep. 30, 2019	2,475,944			1,330	1,871,433	(90,862)	543,638		150,405
Balance, Shares at Sep. 30, 2019			128,174
Balance at Dec. 31, 2018	1,438,274			836	1,041,000	(22,010)	461,360		(42,912)
Balance, Shares at Dec. 31, 2018			82,497
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201613Member
Balance at Dec. 31, 2019	2,460,846	$ (62,779)		1,330	1,873,063	(100,752)	572,503	$ (62,779)	114,702
Balance, Shares at Dec. 31, 2019			127,598
Balance at Mar. 31, 2019	2,302,823			1,329	1,867,757	(80,833)	496,709		17,861
Balance, Shares at Mar. 31, 2019			128,762
Net income (loss)	48,346						48,346
Equity-based compensation cost	2,711				2,711
Cash dividends declared	(22,539)						(22,539)
Dividend equivalents on restricted stock units	(257)						(257)
Common stock issuance costs	(285)				(285)
Issuance of common shares for restricted stock unit vesting, Shares			32
Issuance of treasury stock shares for exercise of stock warrants					(86)	86
Issuance of treasury stock shares for exercise of stock warrants, shares			5
Other comprehensive income (loss)	95,273								95,273
Balance at Jun. 30, 2019	2,426,072			1,329	1,870,097	(80,747)	522,259		113,134
Balance, Shares at Jun. 30, 2019			128,799
Net income (loss)	43,986						43,986
Equity-based compensation cost	1,501				1,501
Cash dividends declared	(22,438)						(22,438)
Dividend equivalents on restricted stock units	(169)						(169)
Purchase of treasury stock, at cost	(10,346)					(10,346)
Purchase of treasury stock, at cost, Shares			(667)
Issuance of common shares for restricted stock unit vesting	1			1
Issuance of common shares for restricted stock unit vesting, Shares			30
Issuance of treasury stock shares for exercise of stock warrants	66				(165)	231
Issuance of treasury stock shares for exercise of stock warrants, shares			12
Other comprehensive income (loss)	37,271								37,271
Balance at Sep. 30, 2019	2,475,944			1,330	1,871,433	(90,862)	543,638		150,405
Balance, Shares at Sep. 30, 2019			128,174
Balance at Dec. 31, 2019	2,460,846	$ (62,779)		1,330	1,873,063	(100,752)	572,503	$ (62,779)	114,702
Balance, Shares at Dec. 31, 2019			127,598
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201613Member						us-gaap:AccountingStandardsUpdate201613Member
Net income (loss)	(399,311)						(399,311)
Equity-based compensation cost	1,063				1,063
Cash dividends declared	(22,139)						(22,139)
Dividend equivalents on restricted stock units	(136)						(136)
Purchase of treasury stock, at cost	(29,973)					(29,973)
Purchase of treasury stock, at cost, Shares			(1,831)
Issuance of common shares for restricted stock unit vesting	1			1
Issuance of common shares for restricted stock unit vesting, Shares			131
Other comprehensive income (loss)	165,971								165,971
Balance at Mar. 31, 2020	2,113,543			1,331	1,874,126	(130,725)	88,138		280,673
Balance, Shares at Mar. 31, 2020			125,898
Balance at Dec. 31, 2019	2,460,846	$ (62,779)		1,330	1,873,063	(100,752)	572,503	$ (62,779)	114,702
Balance, Shares at Dec. 31, 2019			127,598
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201613Member
Net income (loss)	(406,110)
Other comprehensive income (loss)	140,001								140,001
Balance at Sep. 30, 2020	2,071,472			1,332	1,877,627	(130,890)	68,700		254,703
Balance, Shares at Sep. 30, 2020			125,947
Balance at Mar. 31, 2020	2,113,543			1,331	1,874,126	(130,725)	88,138		280,673
Balance, Shares at Mar. 31, 2020			125,898
Net income (loss)	(56,114)						(56,114)
Equity-based compensation cost	1,525				1,525
Cash dividends declared	(6,296)						(6,296)
Dividend equivalents on restricted stock units	35						35
Issuance of common shares for restricted stock unit vesting, Shares			33
Other comprehensive income (loss)	(7,213)								(7,213)
Balance at Jun. 30, 2020	2,045,480			1,331	1,875,651	(130,725)	25,763		273,460
Balance, Shares at Jun. 30, 2020			125,931
Net income (loss)	49,315						49,315
Equity-based compensation cost	1,976				1,976
Cash dividends declared	(6,299)						(6,299)
Dividend equivalents on restricted stock units	(79)						(79)
Purchase of treasury stock, at cost	(165)					(165)
Purchase of treasury stock, at cost, Shares			(18)
Issuance of common shares for restricted stock unit vesting	1			1
Issuance of common shares for restricted stock unit vesting, Shares			34
Other comprehensive income (loss)	(18,757)								(18,757)
Balance at Sep. 30, 2020	$ 2,071,472			$ 1,332	$ 1,877,627	$ (130,890)	$ 68,700		$ 254,703
Balance, Shares at Sep. 30, 2020			125,947

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Statement Of Stockholders Equity [Abstract]
Cash dividends declared per common share	$ 0.05	$ 0.05	$ 0.175	$ 0.175	$ 0.175	$ 0.175

UNAUDITED CONDENSED CONSOLIDATE

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Statement Of Cash Flows [Abstract]
CASH FLOWS FROM OPERATING ACTIVITIES	$ 454,601	$ 218,262
CASH FLOWS FROM INVESTING ACTIVITIES
Cash received in acquisitions, net		409,137
Purchase of securities available-for-sale	(1,343,466)	(406,408)
Proceeds from sales of securities available-for-sale	226,302	384,298
Proceeds from maturities, calls and paydowns of securities available-for-sale	450,443	233,469
Purchases of other securities, net	(401)	(26,487)
Proceeds from sales of loans held for sale	48,732	16,984
Increase in loans, net	(538,733)	(259,731)
Purchase of premises and equipment	(10,505)	(9,562)
Proceeds from disposition of foreclosed property	3,063	5,621
Other, net	(10,183)	(1,789)
Net cash (used in) provided by investing activities	(1,174,748)	345,532
CASH FLOWS FROM FINANCING ACTIVITIES
Increase (decrease) in deposits, net	1,043,427	(18,108)
Net change in securities sold under agreements to repurchase		(25,005)
Net change in short term FHLB advances		(150,000)
Issuance of subordinated debentures		83,474
Proceeds from long term FHLB advances		100,000
Repayment of senior debt		(134,922)
Repurchase of common stock	(30,138)	(69,176)
Cash dividends paid on common stock	(34,734)	(67,704)
Other, net		(531)
Net cash provided by (used in) financing activities	978,555	(281,972)
Net increase in cash and cash equivalents	258,408	281,822
Cash and cash equivalents at beginning of period	988,764	779,280
Cash and cash equivalents at end of period	1,247,172	1,061,102
Cash paid during the period for:
Interest	81,154	155,544
Income taxes paid	79,393	45,801
Cash paid for amounts included in lease liabilities	8,366	8,492
Non-cash investing activities (at fair value):
Acquisition of real estate and other assets in settlement of loans	20,674	1,949
Transfers of loans held for sale to loans	11,474	34,939
Transfers of loans to loans held for sale	1,866	27,135
Right-of-use assets (remeasured) obtained in exchange for operating lease liabilities	$ 390	$ 83,333

Summary of Accounting Policies

Summary of Accounting Policies	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Summary of Accounting Policies	Note 1—Summary of Accounting Policies Basis of Presentation and Consolidation The accompanying unaudited consolidated financial statements for the Company have been prepared in accordance with instructions to the SEC Form 10-Q and Article 10 of Regulation S-X; therefore, they do not include all information and footnotes necessary for a fair presentation of financial position, results of operations, comprehensive income, and cash flows in conformity with accounting principles generally accepted in the United States of America (“GAAP”). All adjustments consisting of normally recurring accruals that, in the opinion of management, are necessary for a fair presentation of the consolidated financial position and results of operations for the periods covered by this report have been included. These interim financial statements should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2019. Operating results for the period ended September 30, 2020 are not necessarily indicative of the results that may be expected for the year ending December 31, 2020. 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 unaudited 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 (see Note 15). Certain amounts reported in prior years have been reclassified to conform to the 2020 presentation. These reclassifications did not materially impact the Company’s consolidated balance sheets or consolidated statements of operations. In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 855, Subsequent Events Nature of Operations The Company’s primary subsidiary is 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 full banking services in six southern states: Alabama, Florida, Georgia, Mississippi, Tennessee, and Texas. The Bank’s operating subsidiaries include: • Linscomb & Williams, Inc. — financial advisory firm; • Cadence Investment Services, Inc. — provides investment and insurance products; and • Altera Payroll and Insurance, Inc. — provides payroll processing services and the sale of certain 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 goodwill, intangible assets, and deferred income taxes. Accounting Policies 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. The aggregate balances of related party loans and deposits are insignificant as of September 30, 2020 and December 31, 2019. Loans and Allowances for Credit Losses (“ACL”) In June 2016, the FASB issued Accounting Standards Update (“ASU”) No. 2016-13, Financial Instruments–Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments Codification Improvements to Topic 326, Financial Instruments–Credit Losses Codification Improvements to Topic 326, Financial Instruments–Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments Financial Instruments–Credit Losses (Topic 326): Targeted Transition Relief Financial Instruments–Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842): Effective Dates Codification Improvements to Topic 326, Financial Instruments–Credit Losses • Replaces 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. • Eliminates existing guidance for acquired credit impaired (“ACI”) loans and requires recognition of the nonaccretable difference as an increase to the allowance for expected credit losses on financial assets purchased with more than insignificant credit deterioration since origination, referred to as purchase credit deteriorated (“PCD”) assets, which will be offset by an increase in the amortized cost of the related loans. For ACI loans accounted for under ASC 310-30 prior to adoption, the guidance in this amendment for PCD assets will be prospectively applied. • Requires inclusion of expected recoveries, limited to the cumulative amount of prior write-offs, when estimating the allowance for credit losses for in-scope financial assets (including collateral dependent assets). • Amends existing impairment guidance for available-for-sale securities to incorporate an allowance, which will allow for reversals of credit impairments if the credit of an issuer improves. • 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 Company adopted ASC 326 and additional related guidance effective January 1, 2020, using the cumulative effect method. As a result of this adoption, the Company recognized an adjustment to retained earnings of $62.8 million, recorded a deferred tax asset of $19.5 million, and reclassed ACL of $6.1 million with respect to PCD loans, formerly ACI loans, as of January 1, 2020. Because the Company adopted ASC 326 with a cumulative effect adjustment as of January 1, 2020, the comparative results as of December 31, 2019, and for the three and nine months ended September 30, 2019, have not been restated and continue to be reported under the incurred loss accounting model. The Company has elected the transition provisions provided by the banking agencies and will phase in the regulatory capital effects of the “Day One” and subsequent provisions for loan losses resulting from adoption of CECL. See Note 12 for additional disclosure. Other changes to the Company’s significant accounting policies pertaining to Loans and the ACL as incorporated under ASC 326 are as follows: • In accordance with ASC 326, the Company uses amortized cost as a basis for determining the ACL; whereas, prior to adopting ASC 326, under the incurred loss accounting model the Company used recorded investment. The components of amortized cost include unpaid principal balance (“UPB”), unamortized discounts and premiums, and unamortized deferred fees and costs. As permitted by ASC 326, the Company has elected to not include accrued interest receivable in the determination of amortized cost and measurement of expected credit losses and, instead, has an accounting policy to write off accrued interest deemed uncollectible in a timely manner. • ASC 326 provides special initial recognition and measurement for the Day One accounting for PCD assets. o ASC 326 requires entities that purchase certain financial assets (or portfolios of financial assets) with the intention of holding them for investment to determine whether the assets have experienced more-than-insignificant deterioration in credit quality since origination. o More-than-insignificant deterioration will generally be determined by the asset’s delinquency status, risk rating changes, credit rating, accruing status or other indicators of credit deterioration since origination. o An entity initially measures the amortized cost of a PCD asset by adding the acquisition date estimate of expected credit losses to the asset’s purchase price. Because the initial estimate for expected credit losses is added to the purchase price to establish the Day One amortized cost, PCD accounting is commonly referred to as a “gross-up” approach. There is no credit loss expense recognized upon acquisition of a PCD asset; rather the “gross-up” is offset by establishment of the initial allowance. o After initial recognition, the accounting for a PCD asset will generally follow the credit loss model. o Interest income for a PCD asset is recognized using the effective interest rate (“EIR”) calculated at initial measurement. This EIR is determined by comparing the amortized cost basis of the instrument to its contractual cash flows, consistent with ASC 310-20. Accordingly, since the PCD gross-up is included in the amortized cost, the purchase discount related to estimated credit losses on acquisition is not accreted into interest income. Only the noncredit-related discount or premium is accreted or amortized, using the EIR that was calculated at the time the asset was acquired. • Commercial loans are generally placed on nonaccrual status when principal or interest is past due 90 days or more unless the loan is well secured and in the process of collection. 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. Prior to the adoption of ASC 326, the majority of our current PCD loans were treated as accruing loans as the Company was able to reasonably predict future cash flows at the unit of account or pool level. After adoption, the accruing status of each individual loan will be subject to the nonaccrual polices described above. • 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 amortized costs in the loan is deemed fully collectible. The ACL is maintained through charges to income in the form of a provision for credit losses at a level management believes is adequate to absorb an estimate of expected credit losses over the contractual life of the loan portfolio 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. The following is a description of the Company’s process for estimating the ACL for all loans in its portfolio, including PCD loans: • The quantitative component of the Company’s ACL model includes three segments: commercial (“C&I”), commercial real estate (“CRE”), and consumer. o The C&I loan segment includes loans to clients in specialized industries, including restaurant, healthcare, and technology. Additional commercial lending activities include energy, general corporate loans, business banking and community banking loans. The C&I segment uses loan level through-the-cycle probability-of-default (“PD”) and loss-given-default (“LGD”) ratings generated by Cadence’s scorecards. These PD ratings are conditioned by industry to reflect the effect of certain forecasted macroeconomic variables, such as market value, interest rate spreads, and unemployment rate. o The CRE loan segment includes loans which are secured by a variety of property types, including multi-family dwellings, office buildings, industrial properties, and retail facilities. The Company offers construction financing, acquisition or refinancing of properties primarily located in our markets in Texas and the southeast United States. The CRE loan segment uses a loss-rate model, where lifetime loss rates are correlated closely with characteristics such as origination LTV, vintage/origination quality, and loan age, as well as with macroeconomic factors, including GDP growth rate, unemployment rate, and CRE market price change. o The consumer loan segment primarily consists of one-to-four family residential real estate loans with terms ranging from 10 to 30 years; however, the portfolio is heavily weighted to the 30-year term. The Company offers both fixed and adjustable interest rates and does not originate subprime loans. These loans are typically closed-end first lien loans for purposes of purchasing property, or for refinancing existing loans with or without cash out. Our loans are primarily owner occupied, full documentation loans. This segment also offers consumer loans to our customers for personal, family and household purposes, auto, boat and personal installment loans, however, these loans are a small percentage of the portfolio. The consumer loan segment uses a loss-rate model. Life-time loss rates capture the effect of credit score , loan age, size, and other loan characteristics and include Cadence’s own assumptions for LGD and the expected life of the loan. The loss rates are also affected by macroeconomic variables such as the unemployment rate, retails sales percent change year-over-year, household employment percent change year-over-year, Federal Housing Finance Agency (“ FHFA ”) home price index, housing affordability index at origination, and median house price. o When foreclosure of collateral securing a loan is probable, ASC 326 requires that the expected credit loss on a loan be measured based on the fair value of the collateral. When management’s measured value of the impaired loan is less than the amortized cost 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 evaluated are excluded from the collective evaluations described above. 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. o For any collateral dependent loan where foreclosure is not probable, but repayment is expected to be provided primarily from the sale or operation of the collateral and the borrower is experiencing financial difficulty, a practical expedient for measuring the credit loss is allowed using the fair value of the collateral. The Company expects to elect this for qualifying credits particularly when there are unique risk characteristics which prohibit them from being collectively evaluated. When repayment will be from the operation of the collateral, generally fair value is estimated on the present value of expected cash flows from the operation of the collateral (an income approach). When repayment is expected from the sale of the collateral, the present value of the costs to sell will be deducted from the fair value of the collateral measured as of the measurement date. • As described above, loans included in each segment are collectively or individually evaluated to determine an expected credit loss which is allocated to the individual loans. Due to the growth of the credit portfolio into new geographic areas and into new commercial markets 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 the Company’s 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 models 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. • ASC 326 acknowledges that, because historical experience may not fully reflect an institution's expectations about the future, the institution should adjust historical loss information, as necessary, to reflect the current conditions and reasonable and supportable forecasts not already reflected in the historical loss information. The quantitative models use baseline macroeconomic scenario forecast data provided by a nationally recognized rating agency for a reasonable and supportable period in estimating the current expected credit losses. The Company has elected an input reversion approach whereby the selected economic forecast for the identified macroeconomic variables revert to their historical trends. As a rule, the forecasts revert to their long-term equilibrium within two to five years or one “business cycle” depending on the segment. The Company monitors actual loss experience for each loan segment for adjustments required to the loss rates utilized. • Additionally, to adjust historical credit loss information for current conditions and reasonable and supportable forecasts, all significant factors relevant to determining the expected collectability of financial assets as of each reporting date should be considered. ASC 326 provides examples of factors an institution may consider. The banking regulatory agencies believe the qualitative or environmental factors identified in the December 2006 Interagency Policy Statement on the Allowance for Loan and Lease Losses should continue to be relevant under CECL and are covered by the examples of factors that may be considered under ASC 326. These factors require judgments that cannot be subjected to exact mathematical calculation. There are no formulas for translating them into a basis-point adjustment to be applied to historical losses. The adjustment must reflect management’s overall estimate of the extent to which expected losses on a segment of loans will differ from historical loss experience. It would include management’s opinion on the effects related to current conditions and reasonable and supportable forecasts, that are not already reflected in the quantitative loss estimate. These adjustments are highly subjective estimates that will be determined each quarter. To facilitate this process, management has developed certain analyses of selected internal and external data to assist management in determining the risk of imprecision. These primary adjustment factors include, but are not limited to the following: o Lending policies, procedures, practices or philosophy, including underwriting standards and collection, charge-off and recovery practices o 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 o Changes in the nature or size of the portfolio o Changes in portfolio collateral values o Changes in the experience, ability, and depth of lending management, and other relevant staff o 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 o Quality of the institution’s credit review system and processes and the degree of oversight by bank management and the board of directors o Concentrations of credit such as industry and lines of business o Competition and legal and regulatory requirements or other external factors • 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), adversely rated letters of credit, and adversely rated lines of credit. Unfunded commitment volatility is calculated on a trailing nine quarter basis; the resulting expected funding amount is then reserved for based on the current combined reserve rate of the funded portfolio. Adversely rated letters and lines 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 the provision for losses on unfunded commitments is included in the provision for credit losses. Prior to adoption, the provision for losses on unfunded commitments was recorded in other noninterest expense. As of September 30, 2020 and December 31, 2019, the reserve for unfunded commitments totaled $2.4 million and $2.0 million, respectively. Recently Adopted Accounting Pronouncements In January 2017, the FASB issued ASU No. 2017-04, Intangibles–Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework–Changes to the Disclosure Requirements for Fair Value Measurement In August 2018, the FASB issued ASU No. 2018-15, Intangibles–Goodwill and Other–Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force) . This standard aligns the requirements for capitalizing implementation costs in a hosting arrangement service contract with the existing guidance for capitalizing implementation costs incurred for an internal-use software license. This standard also requires capitalizing or expensing implementation costs based on the nature of the costs and the project stage during which they are incurred and establishes additional disclosure requirements. This standard became effective for Cadence on January 1, 2020. The adoption of this guidance had no material impact on the consolidated financial statements. In October 2018, the FASB issued ASU No. 2018-17, Consolidation (Topic 810): Targeted Improvements to Related Party Guidance for Variable Interest Entities In April 2019, the FASB issued ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments–Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments The credit losses and hedging amendments have the same effective dates as the respective standards, unless an entity has already adopted the standards. The adoption of the credit loss standard, or CECL, is discussed above. Since the Company early adopted the guidance in ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities In February 2020, the FASB issued ASU No. 2020-02, Financial Instruments—Credit Losses (Topic 326) and Leases (Topic 842)—Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 119 and Update to SEC Section on Effective Date Related to Accounting Standards Update No. 2016-02, Leases (Topic 842) (SEC Update) In March 2020, the FASB issued ASU No. 2020-03, Codification Improvements to Financial Instruments In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting P ending Accounting Pronouncements In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes In January 2020, the FASB issued ASU No. 2020-01, Investments—Equity Securities (Topic 321), Investments—Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815)—Clarifying the Interactions between Topic 321, Topic 323, and Topic 815 (a consensus of the FASB Emerging Issues Task Force) In August 2020, the FASB issued ASU No. 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity

Business Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2020
Business Combinations [Abstract]
Business Combinations	State Bank On January 1, 2019, the Company acquired all the outstanding stock of State Bank Financial Corporation (“State Bank”) of Atlanta, Georgia in a stock transaction. The Company completed the accounting for the acquisition of State Bank and the measurement period was closed on December 31, 2019. The acquisition added $3.3 billion in loans and $4.1 billion in deposits. State Bank operated 32 branch locations across Georgia. Under the terms of the transaction, State Bank shareholders received 1.271 shares of the Company’s Class A common stock in exchange for each share of State Bank common stock resulting in the Company issuing 49.2 million shares of its Class A common stock. In total, the purchase price for State Bank was $826.4 million, including $826.1 million in the Company’s common stock and $0.3 million representing the fair value of unexercised warrants. The following table provides the purchase price allocation and the consideration paid for State Bank’s net assets. (In thousands, except shares and per share data) As Recorded by Cadence Assets Cash and cash equivalents $ 414,342 Investment securities available-for-sale 667,865 Loans held for sale 148,469 Loans 3,317,897 Premises and equipment 65,646 Cash surrender value of life insurance 69,252 Intangible assets 117,038 Other assets 47,146 Total assets acquired $ 4,847,655 Liabilities Deposits $ 4,096,665 Short term borrowings 23,899 Other liabilities 76,368 Total liabilities assumed 4,196,932 Net identifiable assets acquired over liabilities assumed 650,723 Goodwill 175,657 Net assets acquired over liabilities assumed $ 826,380 Consideration: Cadence Bancorporation common shares issued 49,232,008 Fair value per share of the Company's common stock $ 16.78 Company common stock issued 826,113 Fair value of unexercised warrants 267 Fair value of total consideration transferred $ 826,380 The Company estimated the fair value of loans by utilizing the discounted cash flow method applied to pools of loans aggregated by product categories and interest rate type. In addition, certain cash flows were estimated on an individual loan basis based on current performance and collateral value, if the loan was collateral dependent. Contractual principal and interest cash flows were projected based on the payment type (i.e., amortizing or interest only), interest rate type (i.e., fixed or adjustable), interest rate index, weighted average maturity, weighted average interest rate, weighted average spread, and weighted average interest rate floor of each loan pool. The expected cash flows for each category were determined by estimating future credit losses using probabilities of default (PD), loss given default (LGD) and the rate of prepayments. Projected monthly cash flows were then discounted to present value based on discount rates developed from various sources including an analysis of State Bank’s newly originated loans, a buildup approach and market data. There was no carryover of State Bank’s ACL associated with the loans acquired. Intangible assets consisted of the core deposit intangible and the customer relationship intangible of a subsidiary. The core deposit intangible asset recognized of $111.9 million is being amortized over its estimated useful life of ten years utilizing an accelerated method. The benefit of the deposit base is equal to the difference in cash flows between maintaining the existing deposits and obtaining alternative funds over the life of the deposit base. The difference was tax effected and discounted to present value at a risk-adjusted discount rate. The valuation of the core deposit base includes estimates of the attrition rates for each deposit type based on historical attrition data and market participant information, in addition to estimates of total costs including interest cost, net maintenance cost, cost of reserves, and cost of float. The customer relationship and trademark intangible recognized of $3.7 million and $1.4 million are being amortized over estimated useful lives of ten and twenty years, respectively, using an accelerated method. Goodwill of $175.7 million was recorded as a result of the transaction and is not amortized for financial statement purposes. All the goodwill was assigned to the Banking segment. The goodwill recorded is not deductible for income tax purposes. See also Note 5, Goodwill and Other Intangible Assets. Certificates of deposit, including IRAs, were valued by projecting out the expected cash flows based on the contractual terms of the certificates of deposit. The fair values of savings and transaction deposit accounts were assumed to approximate the carrying value as these accounts have no stated maturity and are payable on demand. These cash flows were discounted using the interest rates on fixed maturity deposits offered by Cadence and State Bank as of January 1, 2019 resulting in a $3.4 million discount amortized over a twelve-month Unfunded commitments are contractual obligations by a financial institution for future funding as it relates to closed end or revolving lines of credit. The Company valued these unfunded commitments at $26.8 million and recorded a liability using the “Netback” method. Wealth & Pension On July 1, 2019, the Company’s wholly owned subsidiary, Linscomb & Williams, Inc., acquired certain assets and assumed certain liabilities of Wealth and Pension Services Group, Inc. (“W&P”), a fee-based investment advisory firm with its principal office in Atlanta, Georgia. The Company completed the accounting for the acquisition and the measurement period was closed on June 30, 2020. The total purchase consideration paid of $8.0 million included an initial cash payment of $5.2 million and future cash payments totaling approximately $2.1 million to be paid in installments over a five-year

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2020
Investments Debt And Equity Securities [Abstract]
Investment Securities	Note 3—Investment Securities A summary of amortized cost and estimated fair value of securities available-for-sale at September 30, 2020 and December 31, 2019 is as follows: (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value September 30, 2020 Securities available-for-sale: Obligations of U.S. government agencies $ 158,573 $ 590 $ 1,326 $ 157,837 Mortgage-backed securities issued or guaranteed by U.S. agencies (MBS) Residential pass-through: Guaranteed by GNMA 108,291 2,617 79 110,829 Issued by FNMA and FHLMC 1,857,808 48,494 853 1,905,449 Other residential mortgage-backed securities 229,095 6,415 — 235,510 Commercial mortgage-backed securities 342,898 14,115 663 356,350 Total MBS 2,538,092 71,641 1,595 2,608,138 Obligations of states and municipal subdivisions 310,023 13,376 675 322,724 Total securities available-for-sale $ 3,006,688 $ 85,607 $ 3,596 $ 3,088,699 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value December 31, 2019 Securities available-for-sale: Obligations of U.S. government agencies $ 69,464 $ 57 $ 415 $ 69,106 Mortgage-backed securities issued or guaranteed by U.S. agencies (MBS) Residential pass-through: Guaranteed by GNMA 98,122 1,205 245 99,082 Issued by FNMA and FHLMC 1,423,771 13,128 1,402 1,435,497 Other residential mortgage-backed securities 292,019 4,197 384 295,832 Commercial mortgage-backed securities 276,533 2,448 3,023 275,958 Total MBS 2,090,445 20,978 5,054 2,106,369 Obligations of states and municipal subdivisions 185,882 7,235 — 193,117 Total securities available-for-sale $ 2,345,791 $ 28,270 $ 5,469 $ 2,368,592 The scheduled contractual maturities of securities available-for-sale at September 30, 2020 were as follows: Amortized Estimated (In thousands) Cost Fair Value Due in one year or less $ 1,333 $ 1,335 Due after one year through five years 1,239 1,228 Due after five years through ten years 100,382 100,466 Due after ten years 365,642 377,532 Mortgage-backed securities 2,538,092 2,608,138 Total $ 3,006,688 $ 3,088,699 Gross gains and gross losses on sales of securities available-for-sale for the three and nine months ended September 30, 2020 and 2019 are presented below. There were no impairment charges related to credit issues included in gross realized losses for the three and nine months ended September 30, 2020 and 2019. The specific identification method is used to reclassify gains and losses out of other comprehensive income at the time of sale. For the Three Months Ended September 30, For the Nine Months Ended September 30, (In thousands) 2020 2019 2020 2019 Gross realized gains $ 79 $ 1,406 $ 5,359 $ 3,219 Gross realized losses — 631 — 1,518 Realized gains, net $ 79 $ 775 $ 5,359 $ 1,701 Securities with a carrying value of $1.2 billion and $629.4 million at September 30, 2020 and December 31, 2019, respectively, were pledged to secure public deposits, FHLB borrowings, repurchase agreements and for other purposes as required or permitted by law. Information pertaining to Unrealized Loss Analysis Losses < 12 Months Losses > 12 Months (In thousands) Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses September 30, 2020 Obligations of U.S. government agencies $ 102,193 $ 1,123 $ 12,114 $ 203 Mortgage-backed securities 276,079 1,580 1,788 15 Obligations of states and municipal subdivisions 66,377 675 — — Total $ 444,649 $ 3,378 $ 13,902 $ 218 Unrealized Loss Analysis Losses < 12 Months Losses > 12 Months (In thousands) Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses December 31, 2019 Obligations of U.S. government agencies $ 33,053 $ 209 $ 13,703 $ 206 Mortgage-backed securities 708,991 4,466 61,506 588 Obligations of states and municipal subdivisions — — — — Total $ 742,044 $ 4,675 $ 75,209 $ 794 As of September 30, 2020 and December 31, 2019, approximately 15% and 35%, respectively, of the fair value of securities in the investment portfolio reflected an unrealized loss. As of September 30, 2020, there were 11 securities that had been in a loss position for more than twelve months, and 51 securities that had been in a loss position for less than 12 months. As of September 30, 2020 the unrealized losses were not deemed to be caused by credit-related issues. Credit loss is defined as the difference between the present value of the cash flows expected to be collected and the amortized cost basis. Any impairment that is not credit-related is recognized in other comprehensive income, net of applicable taxes. None of the unrealized losses relate to the marketability of the securities or the issuer’s ability to honor redemption of the obligations. As of September 30, 2020, allowance for credit losses related to available-for-sale securities is zero as the decline in fair value did not result from credit-related issues. 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.

Loans Held for Sale, Loans and

Loans Held for Sale, Loans and Allowance for Credit Losses	9 Months Ended
	Sep. 30, 2020
Receivables [Abstract]
Loans Held for Sale, Loans and Allowance for Credit Losses	Note 4—Loans Held for Sale, Loans and Allowance for Credit Losses Loans Held for Sale The following table presents a summary of the loans held for sale by portfolio segment at the lower of amortized cost or fair value as of September 30, 2020 and December 31, 2019. (In thousands) September 30, 2020 December 31, 2019 Commercial and industrial $ 38,229 $ 34,767 Commercial real estate 707 49,894 Consumer 15,164 2,988 Total loans held for sale (1) $ 54,100 $ 87,649 (1) $0.1 million and $0.4 million of net accrued interest receivable is excluded from the loan balances above as of September 30, 2020 and December 31, 2019, respectively. Loans The following table presents total loans outstanding by portfolio segment and class of financing receivable as of September 30, 2020 and December 31, 2019. Outstanding balances include originated loans, Acquired Noncredit Impaired (“ANCI”) loans, and Purchase Credit Deteriorated (“PCD”) loans, formerly referred to as Acquired Credit Impaired (“ACI”) loans. See Note 1 for additional information regarding the adoption of the new CECL accounting standard. (In thousands) September 30, 2020 December 31, 2019 (2) Commercial and industrial General C&I $ 4,742,480 $ 4,517,016 Energy 1,391,176 1,419,957 Restaurant 1,091,862 1,027,421 Healthcare 543,604 474,264 Total commercial and industrial 7,769,122 7,438,658 Commercial real estate Industrial, retail, and other 1,717,706 1,691,694 Multifamily 854,651 659,902 Office 540,520 535,676 Total commercial real estate 3,112,877 2,887,272 Consumer Residential 2,497,815 2,568,295 Other 85,742 89,430 Total consumer 2,583,557 2,657,725 Total (1) $ 13,465,556 $ 12,983,655 (1) $48.5 million and $44.5 million of net accrued interest receivable is excluded from the total loan balances above as of September 30, 2020 and December 31, 2019, respectively. (2) December 31, 2019 balances have been reclassified to conform to 2020 presentation for comparability purposes. Paycheck Protection Program. The Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) created the Paycheck Protection Program (“PPP”) to provide certain small businesses with liquidity to support their operations during the COVID-19 pandemic. Entities must meet certain eligibility requirements to receive PPP loans, and they must maintain specified levels of payroll and employment to have the loans forgiven. The conditions are subject to audit by the U.S. government, but entities that borrow less than $2.0 million (together with any affiliates) will be deemed to have made the required certification concerning the necessity of the loan in good faith. However, the SBA does reserve the right to audit any PPP borrower. Under the PPP, eligible small businesses can apply to an SBA-approved lender for a loan that does not require collateral or personal guarantees. The loans have a 1% fixed interest rate. Loans issued prior to June 5 are due in two years unless otherwise modified and loans issued after June 5 are due in five years. However, they are eligible for forgiveness (in full or in part, including any accrued interest) under certain conditions. In response to the COVID-19 pandemic, the Company has taken several actions to offer various forms of support to its customers, employees, and communities that have experienced impacts from this development. The Company is actively working with customers impacted by the economic downturn, including securing loans for our customers under the PPP. The following table presents the Company’s PPP loans by portfolio segment and class of financing receivable as of September 30, 2020. (In thousands) Amortized Cost % of PPP Portfolio Commercial and industrial General C&I $ 738,520 70.0 % Energy 79,192 7.5 Restaurant 142,099 13.5 Healthcare 95,027 9.0 Total PPP loans $ 1,054,838 100.0 % As a % of total loans 7.8 % Allowance for Credit Losses (“ACL”) Credit Risk Management . The Company’s credit risk management is overseen by the Company’s Board of Directors, including its Risk Management Committee, and the Company’s Senior Credit Risk Management Committee (“SCRMC”). The SCRMC is responsible for reviewing the Company’s credit portfolio management information, including asset quality trends, concentration reports, policy, financial and documentation exceptions, delinquencies, charge-offs, and nonperforming assets. The Company’s credit policy requires that key risks be identified and measured, documented and mitigated, to the extent possible, and requires various levels of internal approvals based on the characteristics of the loans, including the size of the exposure. The Company also has customized underwriting guidelines for loans in the Company’s specialized industries that the Company believes reflects the unique characteristics of these industries. Under the Company’s dual credit risk rating (“DCRR”) system, it is the Company’s policy to assign risk ratings to all commercial loan (C&I and CRE) exposures using the Company’s internal credit risk rating system. 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. The assignment of commercial risk ratings is completed on a transactional basis using scorecards. The Company uses a total of nine different scorecards that accommodate various areas of lending. Each scorecard contains two main components: probability of default (“PD”) and loss given default (“LGD”). Each component is assessed using a multitude of both qualitative and quantitative scoring elements, which will generate a percentage for each component. The key elements assessed in the scorecard for PD are financial performance and trends as well as qualitative measures. The key elements for LGD are collateral quality and the structure of the loan. The PD percentage and LGD percentage are converted into PD and LGD risk ratings for each loan. The PD rating is used as the Company’s risk grade of record. Loans with PD ratings of 1 through 8 are loans that the Company rates internally as “Pass.” Loans with PD ratings of 9 through 13 are rated internally as “Criticized” and represent loans for which one or more potential or defined weaknesses exists. Loans with PD ratings of 10 through 13 are also considered “Classified” and represent loans for which one or more defined weaknesses exist. These classifications are consistent with regulatory guidelines. The following is a qualitative description of the Company’s loan classifications: • Pass—For loans within this risk rating, the condition of the borrower and the performance of the loan is satisfactory or better. • Pass/Watch—Borderline risk credits representing the weakest pass risk rating. Pass/Watch credits consist of credits where financial performance is weak, but stable. Weak performance is transitional. The borrower has a viable, defined plan for improvement. Generally, it is not expected for loans to be originated within this category. • 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 uncollectible 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. Consumer purpose loan risk classification is assigned in accordance with the Uniform Retail Credit Classification, based on delinquency and accrual status. An important aspect of the Company’s assessment of risk is the ongoing completion of periodic risk rating reviews. As part of these reviews, the Company seeks to review the risk ratings of each facility within a customer relationship and may recommend an upgrade or downgrade to the risk ratings. The Company’s policy is to review two times per year all customer relationships with an aggregate exposure of $10.0 million or greater as well as all shared national credits (“SNC”). Additionally, all customer relationships with an aggregate exposure of $2.5 million to $10.0 million are reviewed annually. Further, customer relationships with an aggregate exposure of $2.5 million and greater with pass/watch risk ratings are reviewed quarterly. This threshold is reduced to $1.0 million in the fourth quarter of each year. Customer relationships with an aggregate exposure of $1.0 million and greater with criticized risk ratings are reviewed quarterly. Certain relationships are exempt from review, such as relationships where the Company’s exposure is cash-secured. An updated risk rating scorecard is required during each risk review as well as with any credit event that requires credit approval. The Company’s policies establish concentration limits for various industries within the commercial portfolio as well as commercial real estate and other regulatory categories. Concentration limits are monitored and reassessed on a periodic basis and approved by the Risk Management Committee of the Board of Directors on an annual basis. The approval of the Company’s Senior Loan Committee is generally required for relationships in an amount greater than $5.0 million. For loans in an amount greater than $5.0 million that are risk rated 10 or worse, approval of the Credit Transition Committee is generally required. There is a credit executive assigned to each line of business who holds the primary responsibility for the approval process outside of the loan approval committees. ACL Rollforward and Analysis . The following tables provide a summary of the activity in the ACL and the reserve for unfunded commitments for the three and nine months ended September 30, 2020 and 2019 . For the Three Months Ended September 30, 2020 (In thousands) Commercial and Industrial Commercial Real Estate Consumer Total Allowance for Credit Losses Reserve for Unfunded Commitments (1) Total As of June 30, 2020 $ 217,796 $ 112,480 $ 40,625 $ 370,901 $ 3,827 $ 374,728 Provision for credit losses 1,562 33,262 (419 ) 34,405 (1,432 ) 32,973 Charge-offs (18,604 ) (2,978 ) (248 ) (21,830 ) — (21,830 ) Recoveries 1,443 244 249 1,936 — 1,936 As of September 30, 2020 $ 202,197 $ 143,008 $ 40,207 $ 385,412 $ 2,395 $ 387,807 (1) The reserve for unfunded commitments is included in other liabilities on the consolidated balance sheets at September 30, 2020 and June 30, 2020. For the Nine Months Ended September 30, 2020 (In thousands) Commercial and Industrial Commercial Real Estate Consumer Total Allowance for Credit Losses Reserve for Unfunded Commitments (1) Total As of December 31, 2019 $ 89,796 $ 15,319 $ 14,528 $ 119,643 $ 1,699 $ 121,342 Cumulative effect of adoption of CECL 32,951 20,599 22,300 75,850 332 76,182 As of January 1, 2020 122,747 35,918 36,828 195,493 2,031 197,524 Provision for credit losses 160,570 110,420 3,859 274,849 364 275,213 Charge-offs (83,406 ) (3,784 ) (1,190 ) (88,380 ) — (88,380 ) Recoveries 2,286 454 710 3,450 — 3,450 As of September 30, 2020 $ 202,197 $ 143,008 $ 40,207 $ 385,412 $ 2,395 $ 387,807 Allocation of ending ACL Loans collectively evaluated $ 177,035 $ 139,972 $ 40,207 $ 357,214 Loans individually evaluated 25,162 3,036 — 28,198 ACL as of September 30, 2020 $ 202,197 $ 143,008 $ 40,207 $ 385,412 Loans (amortized cost) Loans collectively evaluated $ 7,630,702 $ 3,087,553 $ 2,581,110 $ 13,299,365 Loans individually evaluated 138,420 25,324 2,447 166,191 Loans as of September 30, 2020 (2) $ 7,769,122 $ 3,112,877 $ 2,583,557 $ 13,465,556 (1) The reserve for unfunded commitments is included in other liabilities on the consolidated balance sheets at September 30, 2020 and December 31, 2019. (2) $48.5 million of net accrued interest receivable is excluded from the loan balances above as of September 30, 2020. For the Three Months Ended September 30, 2019 (In thousands) Commercial and Industrial Commercial Real Estate Consumer Small Business Total Allowance for Credit Losses As of June 30, 2019 $ 82,446 $ 13,417 $ 14,464 $ 5,018 $ 115,345 Provision for credit losses 36,660 4,590 1,256 1,258 43,764 Charge-offs (29,632 ) (542 ) (555 ) (921 ) (31,650 ) Recoveries 183 42 79 10 314 As of September 30, 2019 (1) $ 89,657 $ 17,507 $ 15,244 $ 5,365 $ 127,773 (1) Allowance for credit losses and loan balances as calculated and reported under the incurred loss accounting model and reported at September 30, 2019. For the Nine Months Ended September 30, 2019 (In thousands) Commercial and Industrial Commercial Real Estate Consumer Small Business Total Allowance for Credit Losses As of December 31, 2018 $ 66,316 $ 10,452 $ 13,703 $ 3,907 $ 94,378 Provision for credit losses 70,611 7,893 2,702 2,695 83,901 Charge-offs (48,093 ) (880 ) (1,323 ) (1,272 ) (51,568 ) Recoveries 823 42 162 35 1,062 As of September 30, 2019 (1) $ 89,657 $ 17,507 $ 15,244 $ 5,365 $ 127,773 Allocation of ending ACL Loans collectively evaluated for impairment $ 74,341 $ 14,695 $ 15,061 $ 5,304 $ 109,401 Loans individually evaluated for impairment 15,316 2,812 183 61 18,372 ACL as of September 30, 2019 (1) $ 89,657 $ 17,507 $ 15,244 $ 5,365 $ 127,773 Loans Loans collectively evaluated for impairment $ 7,231,114 $ 2,878,461 $ 2,720,110 $ 748,666 $ 13,578,351 Loans individually evaluated for impairment 109,517 22,835 3,112 2,264 137,728 Loans as of September 30, 2019 (1) $ 7,340,631 $ 2,901,296 $ 2,723,222 $ 750,930 $ 13,716,079 (1) Allowance for credit losses and loan balances as calculated and reported under the incurred loss accounting model and reported at September 30, 2019. As described in Note 1, the Company adopted the new CECL accounting standard on January 1, 2020 which increased the ACL by $75.9 million. The ACL was increased an additional $34.4 million and $274.8 million in provision for the third quarter and year-to-date 2020, respectively, which reflects the forecasted effects of COVID-19 on the various loan segments due to higher unemployment, lower GDP, market values, and real estate prices. The third quarter 2020 provision was affected by credit migration as well as a negative shift in the outlook for commercial real estate, particularly the hospitality sector, and a slower expected recovery. The Company’s estimate of the ACL used the baseline scenario provided by a nationally recognized service, as adjusted for consideration of certain qualitative and environmental factors. The Company’s individually evaluated loans totaling $166.2 million at September 30, 2020 are considered collateral dependent loans and generally are considered impaired (Note 1). The majority of the these are within the C&I segment and include loans in the Energy, Restaurant, and General C&I classes. The majority of these loans are supported by an enterprise valuation or by collateral such as real estate, receivables or inventory, with the exception of loans within the Energy Exploration and Production (“E&P”) sector which are secured by oil and gas reserves. Loans within the CRE and consumer segments are secured by commercial and residential real estate. Credit Quality The following table provides information by each credit quality indicator and by origination year (vintage) as of September 30, 2020. The Company defines origination year (vintage) for the purposes of disclosure as the year of execution of the original loan agreement. Loans that are modified as a TDR are considered to be a continuation of the original loan, therefore the origination date of the original loan is reflected as the vintage date. This presentation is consistent with the vintage determination used in the ACL model. The criticized loans with a 2020 vintage relate to credits in resolution. Amortized Cost Basis by Origination Year Revolving Credits (In thousands) 2020 2019 2018 2017 2016 2015 and Prior Revolving Loans Converted to Term Loans Total Commercial and industrial Pass $ 1,494,709 $ 662,526 $ 934,739 $ 603,527 $ 379,457 $ 594,818 $ 2,194,250 $ 13,892 $ 6,877,918 Special mention 137 27,273 39,861 39,407 1,061 29,014 179,300 140 316,193 Substandard 3,236 12,473 131,694 50,298 45,845 110,501 195,504 750 550,301 Doubtful — — 12,141 746 3,621 5,823 2,379 — 24,710 Total commercial and industrial 1,498,082 702,272 1,118,435 693,978 429,984 740,156 2,571,433 14,782 7,769,122 Commercial real estate Pass 301,332 520,504 756,079 579,773 234,644 451,972 99,197 242 2,943,743 Special mention 512 9,379 13,778 44,420 1,408 24,644 193 — 94,334 Substandard — 210 17,303 19,544 25,897 8,543 274 — 71,771 Doubtful — — 3,029 — — — — — 3,029 Total commercial real estate 301,844 530,093 790,189 643,737 261,949 485,159 99,664 242 3,112,877 Consumer Current 342,767 448,653 541,114 291,380 274,699 430,059 227,054 962 2,556,688 30-59 days past due — 776 3,710 157 1,506 1,658 740 — 8,547 60-89 days past due — 379 1,347 181 1,226 1,588 — — 4,721 90+ days past due — 351 7,062 1,014 541 4,614 19 — 13,601 Total consumer 342,767 450,159 553,233 292,732 277,972 437,919 227,813 962 2,583,557 Total (1) $ 2,142,693 $ 1,682,524 $ 2,461,857 $ 1,630,447 $ 969,905 $ 1,663,234 $ 2,898,910 $ 15,986 $ 13,465,556 (1) $48.5 million of net accrued interest receivable is excluded from the loan balances above as of September 30, 2020. Past Due The following tables provide an aging analysis of past due loans by portfolio segment and class of financing receivable. Age Analysis of Past-Due Loans as of September 30, 2020 90+ Days (In thousands) 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due Total Current Total (1) Past Due and Accruing Commercial and industrial General C&I $ 7,038 $ 4,663 $ 7,326 $ 19,027 $ 4,723,453 $ 4,742,480 $ 145 Energy 2,864 — 26,055 28,919 1,362,257 1,391,176 — Restaurant 301 1 21,013 21,315 1,070,547 1,091,862 203 Healthcare 225 90 639 954 542,650 543,604 — Total commercial and industrial 10,428 4,754 55,033 70,215 7,698,907 7,769,122 348 Commercial real estate Industrial, retail, and other 1,083 755 1,951 3,789 1,713,917 1,717,706 148 Multifamily 88 — — 88 854,563 854,651 — Office 48 — 16,267 16,315 524,205 540,520 — Total commercial real estate 1,219 755 18,218 20,192 3,092,685 3,112,877 148 Consumer Residential 8,085 4,687 13,249 26,021 2,471,794 2,497,815 6,414 Other 462 34 352 848 84,894 85,742 350 Total consumer 8,547 4,721 13,601 26,869 2,556,688 2,583,557 6,764 Total $ 20,194 $ 10,230 $ 86,852 $ 117,276 $ 13,348,280 $ 13,465,556 $ 7,260 (1) $48.5 million of net accrued interest receivable is excluded from the loan balances above as of September 30, 2020. Age Analysis of Past-Due Loans as of December 31, 2019 90+ Days (In thousands) 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due Total Current Total (1) Past Due and Accruing Commercial and industrial General C&I $ 23,143 $ 1,117 $ 15,183 $ 39,443 $ 4,477,573 $ 4,517,016 $ 85 Energy — — 8,166 8,166 1,411,791 1,419,957 — Restaurant 1,219 1,284 8,021 10,524 1,016,897 1,027,421 108 Healthcare 497 41 4,143 4,681 469,583 474,264 — Total commercial and industrial 24,859 2,442 35,513 62,814 7,375,844 7,438,658 193 Commercial real estate Industrial, retail, and other 3,354 133 2,255 5,742 1,685,952 1,691,694 — Multifamily — — — — 659,902 659,902 — Office 253 — 1,219 1,472 534,204 535,676 — Total commercial real estate 3,607 133 3,474 7,214 2,880,058 2,887,272 — Consumer Residential 8,967 6,101 7,292 22,360 2,545,935 2,568,295 887 Other 192 37 54 283 89,147 89,430 40 Total consumer 9,159 6,138 7,346 22,643 2,635,082 2,657,725 927 Total $ 37,625 $ 8,713 $ 46,333 $ 92,671 $ 12,890,984 $ 12,983,655 $ 1,120 (1) $44.5 million of net accrued interest receivable is excluded from the loan balances above as of December 31, 2019. Nonaccrual Status The following table provides information about nonaccruing loans by portfolio segment and class of financing receivable as of and for the three and nine months ended September 30, 2020. Nonaccrual Loans - Amortized Cost 90+ Days Interest Income Recognized (In thousands) Beginning of the Period (1) End of the Period No Allowance Recorded Past Due and Accruing (2) Three Months Ended September 30, 2020 Nine Months Ended September 30, 2020 Commercial and industrial General C&I $ 66,589 $ 36,774 $ 3,671 $ 145 $ 4 $ 22 Energy 9,568 48,754 2,864 — 1 10 Restaurant 53,483 59,448 17,191 203 13 51 Healthcare 4,833 1,015 — — — — Total commercial and industrial 134,473 145,991 23,726 348 18 83 Commercial real estate Industrial, retail, and other 5,935 10,475 8,463 148 24 83 Multifamily — — — — — — Office 1,245 16,267 — — — — Total commercial real estate 7,180 26,742 8,463 148 24 83 Consumer Residential 15,101 16,357 2,446 6,414 30 113 Other 24 7 — 350 5 9 Total consumer 15,125 16,364 2,446 6,764 35 122 Total $ 156,778 $ 189,097 $ 34,635 $ 7,260 $ 77 $ 288 (1) Amounts are not comparable to prior period public filings due to our adoption of CECL on January 1, 2020. Prior to this date, pools of individual ACI loans were excluded because they continued to earn interest income from the accretable yield at the pool level. With the adoption of CECL, the pools were discontinued, and performance is based on contractual terms for individual loans. Additionally, prior to January 1, 2020, nonaccrual balances were presented using recorded investment. Upon adoption of CECL, approximately $43.0 million of ACI loans were reclassed to nonaccrual loans. (2) $0.2 million of net accrued interest receivable is excluded from the loan balances above as of September 30, 2020. Loans Modified into 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, 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 is highly subjective in nature, and management’s judgment is required when determining whether a modification is classified as a TDR. All TDRs are individually evaluated to measure the amount of any ACL. The TDR 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 following table provides information regarding loans that were modified into TDRs during the periods indicated. For the Three Months Ended September 30, 2020 2019 (Dollars in thousands) Number of TDRs Amortized Cost (1) Number of TDRs Amortized Cost Commercial and industrial General C&I — $ — 1 $ 11,769 Energy — — 1 — Restaurant — — 1 133 Total — $ — 3 $ 11,902 (1) There was no net accrued interest receivable recorded on the loan balances above as of September 30, 2020. For the Nine Months Ended September 30, 2020 2019 (Dollars in thousands) Number of TDRs Amortized Cost (1) Number of TDRs Amortized Cost Commercial and industrial General C&I 4 $ 16,836 3 $ 19,893 Energy 1 8,013 3 6,445 Restaurant 2 20,779 1 133 Commercial real estate Industrial, retail, and other — — 1 1,455 Total 7 $ 45,628 8 $ 27,926 (1) There was no net accrued interest receivable recorded on the loan balances above as of September 30, 2020. The Company monitors loan payments on an on-going basis to determine if a loan is considered to have a payment default. Determination of payment default involves analyzing the economic conditions that exist for each customer and their ability to generate positive cash flows during the loan term. Default is defined as the earlier of the troubled debt restructuring being placed on non-accrual status or obtaining 90 days past due status with respect to principal and/or interest payments. For the three- and nine-month periods ended September 30, 2020 and September 30, 2019, the Company had no TDRs for which there was a payment default within the 12 months following the restructure date. During the three and nine months ended September 30, 2020, approximately zero and $19.3 million in charge-offs were taken related to one general C&I loan that was modified into a TDR during the same period. During the three and nine months ended September 30, 2019, approximately $27.7 million and $45.5 million in charge-offs were taken related to commercial and industrial loans modified into TDRs during the same period. On March 27, 2020, the CARES Act was signed into law. The CARES Act provides financial institutions the option to temporarily suspend certain requirements under U.S. GAAP related to TDRs for a limited period of time to account for the effects of COVID-19. Additionally, in April 2020, regulators issued the Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customers Affected by the Coronavirus (Revised) which permits certain loan modifications due to the effects of COVID-19 (as defined) to not be identified as a TDR. As of September 30, 2020, the Company had active payment deferrals totaling $376.1 million compared to $1.4 billion at June 30, 2020. As of October 16, 2020, loan payment deferrals were down further to $181.0 million. As of September 30 and June 30, 2020, $3.7 million and zero, respectively, of these loans were exempted from the accounting guidance for TDRs. The following table provides information regarding the types of loan modifications that were modified into TDRs during the periods indicated. For the Three Months Ended September 30, 2020 2019 Number of Loans Modified by: Rate Concession Modified Terms and/or Other Concessions Rate Concession Modified Terms and/or Other Concessions Commercial and industrial General C&I — — — 1 Energy — — — 1 Restaurant — — — 1 Total — — — 3 For the Nine Months Ended September 30, 2020 2019 Number of Loans Modified by: Rate Concession Modified Terms and/or Other Concessions Rate Concession Modified Terms and/or Other Concessions Commercial and industrial General C&I — 4 — 3 Energy 1 — — 3 Restaurant — 2 — 1 Commercial real estate Industrial, retail, and other — — — 1 Total 1 6 — 8 Residential Mortgage Loans in Process of Foreclosure Included in loans are $2.3 million and $4.4 million of consumer loans secured by single family residential real estate that are in process of foreclosure at September 30, 2020 and December 31, 2019, respectively. We have ceased foreclosure activities on residential real estate due to the COVID-19 pandemic. 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 $220 thousand and $151 thousand of foreclosed single-family residential properties in other real estate owned as of September 30, 2020 and December 31, 2019, respectively.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Note 5—Goodwill and Other Intangible Assets The following table summarizes the Company’s goodwill and other intangible assets at September 30, 2020 and December 31, 2019: (In thousands) September 30, 2020 December 31, 2019 Goodwill $ 43,061 $ 485,336 Core deposit intangible, net of accumulated amortization of $75,291 and $60,836, respectively 76,331 90,788 Customer lists, net of accumulated amortization of $23,609 and $21,908, respectively 10,242 11,993 Noncompete agreements, net of accumulated amortization of $286 and $137, respectively 1,070 1,473 Trademarks, net of accumulated amortization of $133 and $75, respectively 1,301 1,359 Total goodwill and intangible assets, net $ 132,005 $ 590,949 In accordance with US GAAP, the Company performs annual tests to identify potential impairment of goodwill. The tests are required to be performed annually and more frequently if events or circumstances indicate a potential impairment may exist. The Company compares the fair value of each reporting unit with its carrying amount, including goodwill. If the carrying amount of a reporting unit exceeds its fair value, an impairment loss is recognized in an amount equal to that excess. Considering the economic conditions resulting from the COVID-19 pandemic, the Company conducted an interim goodwill impairment test in the first quarter of 2020. The interim test indicated a goodwill impairment of $443.7 million within the Bank reporting unit resulting in the Company recording an impairment charge of the same amount in the first quarter of 2020. The primary causes of the goodwill impairment in the Bank reporting unit were economic and industry conditions resulting from the COVID-19 pandemic that caused volatility and reductions in the market capitalization of the Company and its peer banks, increased loan provision estimates, increased discount rates, and other changes in variables driven by the uncertain macro-environment that resulted in the estimated fair value of the reporting unit being less than the reporting unit’s carrying value. The fair value of the reporting unit was determined using an income approach under the framework established for measuring fair value under ASC 820. The Company has $43.1 million in goodwill remaining in its separate reporting units of Trust, Retail Brokerage and Investment Service businesses for which the Company's qualitative assessments based upon the asset and fee-based nature of the businesses did not indicate potential impairment. The fair values of the reporting units are based upon management’s estimates and assumptions. Although management has used the estimates and assumptions it believes to be most appropriate in the circumstances, it should be noted that even relatively minor changes in certain assumptions used in management’s calculations could result in significant differences in the results of the impairment tests. The following table represents changes to the carrying amount of goodwill by segment for the period reported. (In thousands) Banking Financial Services Corporate Consolidated Balance as of December 31, 2019 $ 442,579 $ 42,757 $ — $ 485,336 Additions: Wealth & Pension acquisition — 304 — 304 Other 1,116 — — 1,116 Losses: Impairment (443,695 ) — — (443,695 ) Balance as of September 30, 2020 $ — $ 43,061 $ — $ 43,061 During the first quarter of 2020, goodwill assigned to Banking increased by $1.1 million related to the State Bank acquisition. There was an increase year-to-date of $0.3 million in the goodwill related to the acquisition from Wealth & Pension Services Group, Inc. on July 1, 2019 by the Bank’s subsidiary, Linscomb & Williams, Inc. (see Note 2).

Derivatives

Derivatives	9 Months Ended
	Sep. 30, 2020
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivatives	Note 6—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 “o ther a ssets ” and “o ther l iabilities ” o n 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 s 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 September 30, 2020 and December 31, 2019 were as follows: September 30, 2020 December 31, 2019 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 $ 350,000 $ 25,558 $ — $ 350,000 $ — $ 643 Commercial loan interest rate collars — — — 4,000,000 239,213 — Total derivatives designated as hedging instruments 350,000 25,558 — 4,350,000 239,213 643 Derivatives not designated as hedging instruments: Commercial loan interest rate swaps 1,246,712 24,935 1,976 1,008,805 8,386 899 Commercial loan interest rate caps 145,842 3 3 167,185 18 18 Commercial loan interest rate floors 567,496 13,491 13,491 654,298 8,836 8,836 Commercial loan interest rate collars 68,887 468 468 75,555 257 257 Mortgage loan held-for-sale interest rate lock commitments 36,970 566 — 4,138 22 — Mortgage loan forward sale commitments 16,729 137 — 4,109 26 — Mortgage loan held-for-sale floating commitments 8,942 — — 1,523 — — Foreign exchange contracts 147,384 1,388 1,295 74,322 379 558 Total derivatives not designated as hedging instruments 2,238,962 40,988 17,233 1,989,935 17,924 10,568 Total derivatives $ 2,588,962 $ 66,546 $ 17,233 $ 6,339,935 $ 257,137 $ 11,211 The Company is party to collateral support agreements with certain derivative counterparties. Such agreements require that the Company or the counterparty to maintain collateral based on the fair values of derivative transactions. In the event of default by a counterparty the non-defaulting counterparty would be entitled to the collateral. At September 30, 2020 and December 31, 2019, the Company was required to post $13.3 million and $10.6 million, respectively, in cash or securities as collateral for its derivative transactions, which are included in “interest-bearing deposits with banks” on the Company’s consolidated balance sheets. In addition, the Company had recorded the obligation to return cash collateral provided by a counterparty of $21.8 million and $240.9 million as of September 30, 2020 and December 31, 2019, respectively, within deposits on the Company’s consolidated balance sheet. 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 Three Months Ended September 30, 2020 2019 (In thousands) 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 $ 275 $ 1,278 $ — $ 7,447 $ (1,182 ) $ — Commercial loan interest rate collars — 18,432 — 32,864 2,667 — Derivatives not designated as hedging instruments: Mortgage loans held for sale interest rate lock commitments $ — $ — $ 18 $ — $ — $ 23 Foreign exchange contracts — — 590 — — 823 For the Nine Months Ended September 30, 2020 2019 (In thousands) 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 $ 28,356 $ 2,154 $ — $ 28,419 $ (4,199 ) $ — Commercial loan interest rate collars 147,152 43,358 — 160,429 2,704 — Derivatives not designated as hedging instruments: Mortgage loans held for sale interest rate lock commitments $ — $ — $ 544 $ — $ — $ 50 Foreign exchange contracts — — 2,142 — — 2,947 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, floors and collars to manage overall cash flow changes related to interest rate risk exposure on benchmark interest rate loans (1-Month LIBOR). In February 2019, the Company entered into a $4.0 billion notional interest rate collar with a five-year In 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 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, $ 76.3 million of deferred income on derivatives in OCI at September 30, 2020 is estimated to be reclassified into net interest income during the next twelve months. Significant changes to future interest rates or the amount of outstanding hedged loans could accelerate the timing of the gain’s reclassification to income . There were no reclassifications into income during the nine months ended September 30, 2020 and 2019 as a result of any discontinuance of cash flow hedges because the forecasted transaction is 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 5. 4 years as of September 30, 2020 . 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 operations. 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 September 30, 2020 and December 31, 2019.

Deposits

Deposits	9 Months Ended
	Sep. 30, 2020
Banking And Thrift Other Disclosures [Abstract]
Deposits	Note 7—Deposits Domestic time deposits $250,000 and over were $482.0 million and $644.1 million at September 30, 2020 and December 31, 2019, respectively. There were no foreign time deposits at either September 30, 2020 or December 31, 2019.

Borrowed Funds

Borrowed Funds	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Borrowed Funds	Note 8—Borrowed Funds Senior and Subordinated Debt In June 2019, the Company completed a registered public offering of $85 million aggregate principal amount of 4.75% fixed to floating rate subordinated notes due 2029, the net proceeds of which were used to redeem our 4.875% senior notes due June 28, 2019. The fixed rate will remain at 4.75% until June 30, 2024, at which point the note will convert to a floating rate. 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. The subordinated note due June 28, 2029 will convert to a floating rate on June 28, 2024. The subordinated note due March 11, 2025 converted to a floating rate on March 11, 2020. The Bank’s subordinated note will convert from a fixed rate to a floating rate on June 28, 2024. These transactions enhanced our liquidity and regulatory capital levels to support balance sheet growth. Details of the debt transactions are as follows: (In thousands) September 30, 2020 December 31, 2019 Cadence Bancorporation: 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 3-month LIBOR plus 4.663%, subordinated notes, due March 11, 2025, callable in 2020 40,000 40,000 4.750% subordinated notes, due June 30, 2029, callable in 2024 85,000 85,000 Total — Cadence Bancorporation 210,000 210,000 Cadence Bank: 6.250% subordinated notes, due June 28, 2029, callable in 2024 25,000 25,000 Debt issue costs and unamortized premium (1,779 ) (2,350 ) Total senior and subordinated debt $ 233,221 $ 232,650 The senior transactions were structured with four- and seven-year fifteen-year ten-year ten-year five-year five-year The Company’s outstanding senior note is unsecured, unsubordinated obligations and is equal in right of payment to all the Company’s other unsecured debt. The Company’s subordinated notes are unsecured obligations and will be subordinated in right of payment to all 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 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: (In thousands) September 30, 2020 December 31, 2019 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 (13,077 ) (13,174 ) Total junior subordinated debentures $ 37,542 $ 37,445 Advances from FHLB and Borrowings from FRB Outstanding FHLB advances were $100 million as of September 30, 2020 and December 31, 2019. At September 30, 2020, the outstanding advance was a long-term convertible advance. Advances are collateralized by $3.9 billion of commercial and residential real estate loans pledged under a blanket lien arrangement as of September 30, 2020, which provides $2.6 billion of borrowing availability. As of September 30, 2020 and December 31, 2019, the FHLB has issued for the benefit of the Bank irrevocable letters of credit totaling $776 million and $391 million, respectively. Included in the FHLB letters of credit are $770 million in variable letters of credit in favor of a municipal customer to secure certain deposits. These letters of credit expire on November 30, 2020 and December 22, 2020, respectively. Approximately $6 million in letters of credit are used to secure municipal deposits which expire on January 22, 2021. There were no borrowings from the FRB discount window as of September 30, 2020 and December 31, 2019. Any borrowings from the FRB would be collateralized by $1.6 billion in commercial loans and small business loans under the Paycheck Protection Program pledged under a borrower-in-custody arrangement. Notes Payable On July 1, 2019, the Company’s wholly owned subsidiary, Linscomb & Williams, Inc., acquired certain assets and assumed certain liabilities of Wealth and Pension Services Group, Inc. (“W&P”). At September 30, 2020, a note payable of $1.7 million was outstanding in connection with this acquisition (see Note 2). On March 29, 2019, the Company entered into a credit agreement for a revolving loan facility in the amount of $100 million with a maturity date of March 29, 2020. On March 29, 2020, the Company renewed the credit agreement with a maturity date of March 29, 2021. During the third quarter of 2020, the Company cancelled this facility.

Other Noninterest Income and Ot

Other Noninterest Income and Other Noninterest Expense	9 Months Ended
	Sep. 30, 2020
Other Nonoperating Income Expense [Abstract]
Other Noninterest Income and Other Noninterest Expense	Note 9—Other Noninterest Income and Other Noninterest Expense The detail of other noninterest income and other noninterest expense captions presented in the consolidated statements of operations is as follows: Three Months Ended September 30, Nine Months Ended September 30, (In thousands) 2020 2019 2020 2019 Other noninterest income Insurance revenue $ 239 $ 216 $ 713 $ 658 Mortgage banking income 3,535 1,079 6,666 2,332 Income from bank owned life insurance policies 1,238 1,275 3,786 3,690 Other (1,389 ) 1,730 (3,339 ) 4,710 Total other noninterest income $ 3,623 $ 4,300 $ 7,826 $ 11,390 Three Months Ended September 30, Nine Months Ended September 30, (In thousands) 2020 2019 2020 2019 Other noninterest expenses Data processing expense $ 3,024 $ 3,641 $ 9,460 $ 9,670 Software amortization 4,432 3,406 12,015 9,925 Consulting and professional fees 3,320 2,621 9,035 6,749 Loan related expenses 953 (921 ) 2,448 1,729 FDIC insurance 2,528 527 8,903 4,149 Communications 1,119 1,425 3,278 3,880 Advertising and public relations 716 1,368 3,101 3,253 Legal expenses 681 500 1,672 1,303 Other 8,232 11,864 27,919 29,982 Total other noninterest expenses $ 25,005 $ 24,431 $ 77,831 $ 70,640

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Note 10—Income Taxes Income tax expense (benefit) for the three and nine months ended September 30, 2020 was $9.5 million and ($30.4) million, respectively, compared to $12.8 million and $44.6 million for the same periods in 2019. The effective tax rate was 16.1% and 7.0% for the three and nine months ended September 30, 2020, respectively, compared to 22.5% and 22.9% The effective tax rate is primarily affected by the amount of pre-tax income (loss), and to a lesser extent, tax-exempt interest income, and the increase in cash surrender value of bank-owned life insurance. The effective tax rate is also affected by discrete items that may occur in any given period but are not consistent from period-to-period, which may impact the comparability of the effective tax rate between periods. At September 30, 2020, we had a net deferred tax asset of $71.3 million compared to a net deferred tax liability of

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Earnings Per Common Share	Note 11—Earnings Per Common Share The following table displays a reconciliation of the information used in calculating basic and diluted net income (loss) per common share for the three and nine months ended September 30, 2020 and 2019. Three Months Ended September 30, Nine Months Ended September 30, (In thousands, except share and per share data) 2020 2019 2020 2019 Net income (loss) per consolidated statements of operations $ 49,315 $ 43,986 $ (406,110 ) $ 150,533 Net income allocated to participating securities (431 ) (137 ) — (525 ) Net income (loss) allocated to common stock $ 48,884 $ 43,849 $ (406,110 ) $ 150,008 Weighted average common shares outstanding (Basic) 125,956,714 128,457,491 126,169,823 129,237,553 Weighted average dilutive restricted stock units and warrants 138,154 57,783 — 121,734 Weighted average common shares outstanding (Diluted) 126,094,868 128,515,274 126,169,823 129,359,287 Earnings (loss) per common share (Basic) $ 0.39 $ 0.34 $ (3.22 ) $ 1.16 Earnings (loss) per common share (Diluted) $ 0.39 $ 0.34 $ (3.22 ) $ 1.16 T he effect from the assumed exercise of stock options and restricted stock units of 2,309,357 and 2,285,632 compared to 1,796,588 for the three and nine months ended September 30, 2020 and 2019, respectively, were not included in the above computations of diluted earnings per share because such amounts would have had an antidilutive effect on earnings per common share.

Regulatory Matters

Regulatory Matters	9 Months Ended
	Sep. 30, 2020
Banking And Thrifts [Abstract]
Regulatory Matters	Note 12—Regulatory Matters Cadence and Cadence Bank are each required to comply with regulatory capital requirements established by federal and state banking agencies. Failure to meet minimum capital requirements can subject the Company and the Bank to certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s consolidated financial statements. These regulatory capital requirements involve quantitative measures of the Company’s assets, liabilities and certain off-balance sheet items, and qualitative judgments by the regulators. 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). On March 27, 2020, the federal banking agencies issued an interim final rule (followed by a final rule issued on August 26, 2020) to delay the estimated impact on regulatory capital stemming from the adoption of CECL. The agencies granted this relief to allow institutions to focus on lending to customers in light of recent strains on the U.S economy due to COVID-19, while also maintaining the quality of regulatory capital. Under the final rule, 100% of the CECL Day 1 impact and 25% of subsequent provisions for credit losses (“Day 2” impacts) will be deferred over a two-year year period ending January 1, 2022, at which time this deferred amount will be phased in on a pro rata basis over a three-year period ending January 2025. The actual capital amounts and ratios for the Company and the Bank as of September 30, 2020 and December 31, 2019 are presented in the following tables and as shown, are above the thresholds necessary to be considered “well-capitalized.” Management believes that no events or changes have occurred after September 30, 2020 that would change this designation. Consolidated Company Bank (In thousands) Amount Ratio Amount Ratio September 30, 2020 Tier 1 leverage $ 1,803,403 9.9 % $ 1,876,954 10.3 % Common equity tier 1 capital 1,803,403 12.0 1,826,954 12.2 Tier 1 risk-based capital 1,803,403 12.0 1,876,954 12.5 Total risk-based capital 2,198,061 14.7 2,089,773 14.0 Minimum requirement: Tier 1 leverage 726,475 4.0 726,824 4.0 Common equity tier 1 capital 673,791 4.5 673,806 4.5 Tier 1 risk-based capital 898,388 6.0 898,408 6.0 Total risk-based capital 1,197,851 8.0 1,197,878 8.0 Well capitalized requirement: Tier 1 leverage N/A N/A 908,530 5.0 Common equity tier 1 capital N/A N/A 973,276 6.5 Tier 1 risk-based capital 898,388 6.0 1,197,878 8.0 Total risk-based capital 1,497,313 10.0 1,497,347 10.0 Consolidated Company Bank (In thousands) Amount Ratio Amount Ratio December 31, 2019 Tier 1 leverage $ 1,784,664 10.3 % $ 1,953,008 11.1 % Common equity tier 1 capital 1,784,664 11.5 1,903,008 12.3 Tier 1 risk-based capital 1,784,664 11.5 1,953,008 12.6 Total risk-based capital 2,120,571 13.7 2,099,146 13.6 Minimum requirement: Tier 1 leverage 690,213 4.0 689,881 4.0 Common equity tier 1 capital 697,089 4.5 696,755 4.5 Tier 1 risk-based capital 929,453 6.0 929,007 6.0 Total risk-based capital 1,239,270 8.0 1,238,676 8.0 Well capitalized requirement: Tier 1 leverage N/A N/A 862,351 5.0 Common equity tier 1 capital N/A N/A 1,006,425 6.5 Tier 1 risk-based capital 929,453 6.0 1,238,676 8.0 Total risk-based capital 1,549,088 10.0 1,548,345 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. Due to the effect of the recognition of the non-cash goodwill impairment charge in the first quarter of 2020 to the Banks retained profits, the Bank is currently required to seek prior approval of the OCC to pay a dividend. 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. Additionally, on July 24, 2020, the Federal Reserve amended 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. Effective March 26, 2020, the Federal Reserve Board reduced reserve requirement ratios to zero percent in response to the COVID-19 pandemic in order to help support lending. This action eliminated the reserve requirements for many depository institutions. At December 31, 2019, the required reserve balance with the Federal Reserve Bank was approximately

Commitments and Contingent Liab

Commitments and Contingent Liabilities	9 Months Ended
	Sep. 30, 2020
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	Note 13—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: (In thousands) September 30, 2020 December 31, 2019 Commitments to extend credit $ 4,283,138 $ 4,667,360 Commitments to grant loans 138,531 292,199 Standby letters of credit 202,724 213,548 Performance letters of credit 21,036 27,985 Commercial letters of credit 21,971 15,587 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. Standby letters of credit are conditional commitments issued to guarantee the performance of a customer to a third party. The credit policies and procedures for such commitments are the same as those used for lending activities. Because these instruments have fixed maturity dates and because a number expire without being drawn upon, they generally do not present any significant liquidity risk. No significant losses on commitments were incurred during the three and nine months ended September 30, 2020 and 2019. The Company makes investments in limited partnerships, including certain low-income housing partnerships for which tax credits are received. As of September 30, 2020 and December 31, 2019, 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.

Disclosure About Fair Values of

Disclosure About Fair Values of Financial Instruments	9 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Disclosure About Fair Values of Financial Instruments	Note 14—Disclosure About Fair Values of Financial Instruments See Note 20 to the consolidated financial statements of the Annual Report on Form 10-K for the year ended December 31, 2019 for a description of valuation methodologies for assets and liabilities measured at fair value on a recurring and non-recurring basis. 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 at September 30, 2020 and December 31, 2019: (In thousands) Carrying Value (Level 1) (Level 2) (Level 3) September 30, 2020 Assets Investment securities available-for-sale $ 3,088,699 $ — $ 3,088,699 $ — Derivative assets 66,546 — 66,546 — Other assets 34,521 — — 34,521 Total recurring basis measured assets $ 3,189,766 $ — $ 3,155,245 $ 34,521 Liabilities Derivative liabilities $ 17,233 $ — $ 17,233 $ — Total recurring basis measured liabilities $ 17,233 $ — $ 17,233 $ — (In thousands) Carrying Value (Level 1) (Level 2) (Level 3) December 31, 2019 Assets Investment securities available-for-sale $ 2,368,592 $ — $ 2,368,592 $ — Equity securities with readily determinable fair values not held for trading 1,862 1,862 — — Derivative assets 257,137 — 257,137 — Other assets 26,882 — — 26,882 Total recurring basis measured assets $ 2,654,473 $ 1,862 $ 2,625,729 $ 26,882 Liabilities Derivative liabilities $ 11,211 $ — $ 11,211 $ — Total recurring basis measured liabilities $ 11,211 $ — $ 11,211 $ — Changes in Level 3 Fair Value Measurements The tables below include a roll-forward of the consolidated balance sheet amounts for the three and nine months ended September 30, 2020 and 2019 for changes in the fair value of financial instruments within Level 3 of the valuation hierarchy that are recorded on a recurring basis. Level 3 financial instruments typically include unobservable components but may also include some observable components that may be validated to external sources. The gains or (losses) in the following table (which are reported in other noninterest income in the consolidated income statements) may include changes to fair value due in part to observable factors that may be part of the valuation methodology. Level 3 Assets Measured at Fair Value on a Recurring Basis For the Three Months Ended September 30, 2020 2019 2020 2019 2020 2019 (In thousands) Net Profits Interests Investments in Limited Partnerships SBA Servicing Rights Beginning Balance $ 3,733 $ 5,376 $ 24,631 $ 14,533 $ 3,737 $ 3,786 Originations — — — — 402 455 Net (losses) gains included in earnings (164 ) (73 ) 232 1,119 233 (489 ) Reclassifications — — — 110 — — Acquired in settlement of loans — — — — — — Contributions paid — — 1,904 1,143 — — Distributions received — (143 ) (187 ) (44 ) — — Ending Balance $ 3,569 $ 5,160 $ 26,580 $ 16,861 $ 4,372 $ 3,752 Net (losses) unrealized gains included in earnings relating to assets held at the end of the period $ (164 ) $ (73 ) $ 232 $ 1,119 $ 233 $ (489 ) Net unrealized gains (losses) recognized in other comprehensive income relating to assets held at the end of the period $ — $ — $ — $ — $ — $ — For the Nine Months Ended September 30, 2020 2019 2020 2019 2020 2019 (In thousands) Net Profits Interests Investments in Limited Partnerships SBA Servicing Assets Beginning Balance $ 4,330 $ 5,779 $ 18,742 $ 11,191 $ 3,810 $ — Acquired — — — — — 6,213 Originations — — — — 962 969 Net (losses) gains included in earnings (761 ) (188 ) (1,099 ) 2,153 (400 ) (3,430 ) Reclassifications — — 1,727 (15 ) — — Acquired in settlement of loans — — 4,257 — — — Contributions paid — — 3,687 4,160 — — Distributions received — (431 ) (734 ) (628 ) — — Ending Balance $ 3,569 $ 5,160 $ 26,580 $ 16,861 $ 4,372 $ 3,752 Net (losses) unrealized gains included in earnings relating to assets held at the end of the period $ (761 ) $ (188 ) $ (1,099 ) $ 2,153 $ (400 ) $ (3,430 ) Net unrealized gains (losses) recognized in other comprehensive income relating to assets held at the end of the period $ — $ — $ — $ — $ — $ — 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 September 30, 2020 and December 31, 2019, 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) September 30, 2020 Loans held for sale $ 54,100 $ — $ 54,100 $ — Individually evaluated loans, net of allocated allowance for credit losses (1) 137,992 — — 137,992 Other real estate and repossessed assets 6,458 — 6,458 Total assets measured on a nonrecurring basis $ 198,550 $ — $ 54,100 $ 144,450 (In thousands) Carrying Value (Level 1) (Level 2) (Level 3) December 31, 2019 Loans held for sale $ 87,649 $ — $ 87,649 $ — Individually evaluated loans, net of allocated allowance for credit losses (1) 101,561 — — 101,561 Other real estate 1,628 — — 1,628 Total assets measured on a nonrecurring basis $ 190,838 $ — $ 87,649 $ 103,189 (1) Prior to the adoption of CECL on January 1, 2020, these loans were known as Impaired loans, net of specific allowance. 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 Weighted Average (2) September 30, 2020 Individually evaluated loans, net of allowance for credit losses (3) $ 137,992 Appraised value, as adjusted Discount to fair value 0% - 78% 28% Discounted cash flow Discount rate 3.75% - 3.91% 3.9% Enterprise value Comparables and average multiplier 4.5x - 6.47x 4.71x Enterprise value Discount rates and comparables 13%-15% 14% Other real estate and repossessed assets 6,458 Appraised value, as adjusted Discount to fair value 0% - 20% 10% Estimated closing costs 10% 10% Quantitative Information about Level 3 Fair Value Measurements (In thousands) Carrying Value Valuation Methods Unobservable Inputs Range December 31, 2019 Individually evaluated loans, net of allowance for credit losses (3) $ 101,561 Appraised value, as adjusted Discount to fair value 0% - 50% Appraised value, as adjusted Minimum guaranteed proceeds per Settlement Agreement 0% (1) Discounted cash flow Discount rate 5.8% 0% (1) Enterprise value Exit and earnings multiples, discounted cash flows, and market comparables 0% - 46% (1) Other real estate 1,628 Appraised value, as adjusted Discount to fair value 0% - 20% Estimated closing costs 10% (1) - Represents difference of remaining balance to fair value. (2) - Weighted averages was calculated using the input attribute and the outstanding balance of the loan (3) - Prior to the adoption of CECL on January 1, 2020, these loans were known as Impaired loans, net of specific allowance. The estimated fair values of the Company’s financial instruments are as follows: September 30, 2020 (In thousands) Carrying Amount Fair Value Level 1 Level 2 Level 3 Financial Assets: Cash and due from banks $ 174,549 $ 174,549 $ 174,549 $ — $ — Interest-bearing deposits in other banks 1,067,258 1,067,258 1,067,258 — — Federal funds sold 5,365 5,365 5,365 — — Investment securities available-for-sale 3,088,699 3,088,699 — 3,088,699 — Loans held for sale 54,100 54,100 — 54,100 — Net loans 13,080,144 13,184,043 — — 13,184,043 Derivative assets 66,546 66,546 — 66,546 — Other assets 96,446 96,446 — — 96,446 Financial Liabilities: Deposits 15,786,221 15,796,140 — 15,796,140 — Advances from FHLB 100,000 100,000 — 100,000 — Senior debt 49,978 50,675 — 50,675 — Subordinated debt 183,243 188,153 — 188,153 — Junior subordinated debentures 37,542 40,621 — 40,621 — Notes payable 1,683 1,683 — 1,683 — Derivative liabilities 17,233 17,233 — 17,233 — December 31, 2019 (In thousands) Carrying Amount Fair Value Level 1 Level 2 Level 3 Financial Assets: Cash and due from banks $ 252,447 $ 252,447 $ 252,447 $ — $ — Interest-bearing deposits in other banks 725,343 725,343 725,343 — — Federal funds sold 10,974 10,974 10,974 — — Investment securities available-for-sale 2,368,592 2,368,592 — 2,368,592 — Equity securities with readily determinable fair values not held for trading 1,862 1,862 1,862 — — Loans held for sale 87,649 87,649 — 87,649 — Net loans 12,864,012 12,755,360 — — 12,755,360 Derivative assets 257,137 257,137 — 257,137 — Other assets 72,719 72,719 — — 72,719 Financial Liabilities: Deposits 14,742,794 14,753,192 — 14,753,192 — Advances from FHLB 100,000 100,000 — 100,000 — Senior debt 49,938 51,202 — 51,202 — Subordinated debt 182,712 189,386 — 189,386 — Junior subordinated debentures 37,445 48,012 — 48,012 — Notes payable 2,078 2,078 — 2,078 — Derivative liabilities 11,211 11,211 — 11,211 —

Variable Interest Entities and

Variable Interest Entities and Other Investments	9 Months Ended
	Sep. 30, 2020
Variable Interest Entities And Other Investments [Abstract]
Variable Interest Entities and Other Investments	Note 15—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 September 30, 2020 and December 31, 2019, 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 September 30, 2020 and December 31, 2019, the Company had recorded investments in other assets on its consolidated balance sheets of approximately $33.2 million and $28.2 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 (“NAV”) totaling $26.6 million and $18.7 million as of September 30, 2020 and December 31, 2019, respectively. The company recognized $0.2 million in gains and $1.1 million in losses for the three and nine months ended September 30, 2020 compared to $1.1 million and $2.2 million in gains for the same periods in 2019 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 $7.0 million and $8.7 million as of September 30, 2020 and December 31, 2019, respectively. Other limited partnerships are accounted for under the equity method totaling $15.9 million and $9.0 million at September 30, 2020 and December 31, 2019, respectively. The following table presents a summary of the Company’s investments in limited partnerships as of September 30, 2020 and December 31, 2019: (In thousands) September 30, 2020 December 31, 2019 Affordable housing projects (amortized cost) $ 33,236 $ 28,205 Limited partnerships accounted for under the fair value practical expedient of NAV 26,580 18,742 Limited partnerships without readily determinable fair values that do not qualify for the practical expedient of NAV accounted for under the cost method 6,964 8,681 Limited partnerships required to be accounted for under the equity method 15,886 8,951 Total investments in limited partnerships $ 82,666 $ 64,579 Equity investments with readily determinable fair values not held for trading are 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. As of September 30, 2020, and December 31, 2019, there were no downward and upward adjustments for impairments or price changes from observable transactions, however, due to the current economic environment one investment was determined to be fully impaired and a $1.9 million charge recognized during the second quarter of 2020. The carrying amount of equity investments measured under the measurement alternative are as follows: For the Nine Months Ended September 30, (In thousands) 2020 2019 Carrying value, Beginning of Year $ 8,681 $ 8,714 Reclassifications (1,727 ) 15 Net income change 49 — Distributions (610 ) (1,073 ) Contributions 571 1,865 Carrying value, End of Period $ 6,964 $ 9,521 Cadence’s investments in certain markable equity securities are carried at fair value and are reported in other assets in the consolidated balance sheets. Total marketable equity securities were $1.0 thousand and $1.9 million at September 30, 2020 and December 31, 2019, respectively. The Company sold equity securities totaling $1.3 million during the third quarter. 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 net profits interest is a financial instrument and recorded at estimated fair value, which was $3.6 million and $4.3 million at September 30, 2020 and December 31, 2019, 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. At September 30, 2020 and December 31, 2019, the amount of rabbi trust assets and benefit obligation was $3.7 million.

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Segment Reporting	Note 16—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. Additional information about the Company’s reportable segments is included in Cadence’s Annual Report on Form 10-K for the year ended December 31, 2019. The Banking Segment includes the Commercial Banking, Retail Banking and Private Banking lines of business. The Financial Services Segment includes the Trust, Retail Brokerage, and Investment Services businesses. 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. In the first quarter of 2020, the Company recognized a $443.7 million non-cash goodwill impairment charge representing all the goodwill allocated to the Banking segment (Note 5). The accounting policies used by each reportable segment are the same as those discussed in Note 1 of the Annual Report on Form 10-K for the year ended December 31, 2019. 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 three and nine months ended September 30, 2020 and 2019: Three Months Ended September 30, 2020 (In thousands) Banking Financial Services Corporate Consolidated Net interest income (expense) $ 157,318 $ (34 ) $ (3,242 ) $ 154,042 Provision for credit losses 32,973 — — 32,973 Noninterest income 20,993 11,517 81 32,591 Noninterest expense 85,510 8,312 1,037 94,859 Income tax expense (benefit) 14,086 404 (5,004 ) 9,486 Net income $ 45,742 $ 2,767 $ 806 $ 49,315 Total assets $ 18,305,151 $ 94,407 $ 4,637 $ 18,404,195 Three Months Ended September 30, 2019 (In thousands) Banking Financial Services Corporate Consolidated Net interest income (expense) $ 164,535 $ (524 ) $ (3,824 ) $ 160,187 Provision for credit losses 43,764 — — 43,764 Noninterest income 23,407 11,052 183 34,642 Noninterest expense 84,113 9,255 915 94,283 Income tax expense (benefit) 13,931 183 (1,318 ) 12,796 Net income (loss) $ 46,134 $ 1,090 $ (3,238 ) $ 43,986 Total assets $ 17,743,054 $ 106,248 $ 6,644 $ 17,855,946 Nine Months Ended September 30, 2020 (In thousands) Banking Financial Services Corporate Consolidated Net interest income (expense) $ 473,316 $ (444 ) $ (10,647 ) $ 462,225 Provision for credit losses 275,213 — — 275,213 Noninterest income (expenses) 65,212 32,691 (293 ) 97,610 Noninterest expense 692,557 25,286 3,290 721,133 Income tax (benefit) expense (30,513 ) 877 (765 ) (30,401 ) Net (loss) income $ (398,729 ) $ 6,084 $ (13,465 ) $ (406,110 ) Total assets $ 18,305,151 $ 94,407 $ 4,637 $ 18,404,195 Nine Months Ended September 30, 2019 (In thousands) Banking Financial Services Corporate Consolidated Net interest income (expense) $ 504,764 $ (1,746 ) $ (12,754 ) $ 490,264 Provision for credit losses 83,901 — — 83,901 Noninterest income 66,557 29,782 688 97,027 Noninterest expense 272,721 24,804 10,727 308,252 Income tax expense (benefit) 49,685 495 (5,575 ) 44,605 Net income (loss) $ 165,014 $ 2,737 $ (17,218 ) $ 150,533 Total assets $ 17,743,054 $ 106,248 $ 6,644 $ 17,855,946

Equity-based Compensation

Equity-based Compensation	9 Months Ended
	Sep. 30, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Equity-based Compensation	Note 17—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 7.5 million 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 3.5 million at September 30, 2020. Restricted Stock Units During the nine months ended September 30, 2020 and 2019, the Company granted 778,881 and 1,163,959 shares, respectively, of stock-based awards in the form of restricted stock units pursuant to and subject to the provisions of the Plan. The following table summarizes the activity related to restricted stock unit awards: For the Nine Months Ended September 30, 2020 2019 Number of Shares Weighted Average Fair Value per Unit at Award Date Number of Shares Weighted Average Fair Value per Unit at Award Date Non-vested at beginning of period 1,229,863 $ 19.97 273,354 $ 26.49 Granted during the period 778,881 7.78 1,163,959 18.53 Vested during the period (237,277 ) 19.61 (117,037 ) 21.05 Forfeited during the period (77,198 ) 18.71 (56,048 ) 20.54 Non-vested at end of period 1,694,269 $ 14.47 1,264,228 $ 19.93 The restricted stock units granted include both time and performance-based components. Of the time-based restricted stock units granted and remaining at September 30, 2020: • 41,843 • 1,058 • 207,972 • 21,653 • 48,562 • 175,292 • 5,252 • 7,426 • 760,174 • 3,000 • 6,000 While the grants specify 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. For the performance-based restricted stock units granted, these performance conditions will determine the actual units vesting and can be in the range of 0% to 200% of the units granted. 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. The fair value of the restricted stock units was estimated based upon the fair value of the underlying shares on the date of the grant. The Company recorded $1.7 million and $4.0 million of equity-based compensation expense for the outstanding restricted stock units for the three and nine months ended September 30, 2020, respectively, compared to $1.3 million and $4.9 million for the three and nine months ended September 30, 2019, respectively. The remaining expense related to unvested restricted stock units is $16.5 million as of September 30, 2020 and will be recognized over service periods ranging from 3 months to 45 months. Stock Options During the nine months ended September 30, 2020 and 2019, the Company granted zero and 1,602,848 stock options, respectively, to certain executive officers. The options were granted at an exercise price equal to a 15% premium to the fair value of the common stock at the date of grant with a weighted-average exercise price of $20.43. The options vest over a three-year The Company used the Black-Scholes option pricing model to estimate the fair value of the stock options. See Note 23 to the consolidated financial statements of our Annual Report on Form 10-K for the year ended December 31, 2019 for a description of the assumptions used for stock option awards issued during 2019. Employee Stock Purchase Plan 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 at a discount of 15% of the fair market value of a share of Class A common stock, defined as the closing price of Class A common stock on the NYSE for the first and last days of the purchase period (as defined in the ESPP). The total amount of the Company’s Class A common stock on which options may be granted under the ESPP shall not exceed 500,000 shares. Shares of Class A 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 were 149,250 shares and 82,651 shares of Class A common stock purchased in the open market by the ESPP during the nine months ended September 30, 2020 and 2019, respectively, which resulted in compensation expense of $72 thousand and $116 thousand for the three and nine months ended September 30, 2020, respectively, compared to $67 thousand and $239 thousand for the three and nine months ended September 30, 2019, respectively.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Note 18—Accumulated Other Comprehensive Income (Loss) Activity within the balances in accumulated other comprehensive income (loss) is shown in the following tables for the nine months ended September 30, 2020 and 2019. Nine Months Ended September 30, 2020 (In thousands) Unrealized gains on securities available-for-sale Unrealized gains on derivative instruments designated as cash flow hedges Unrealized gains on defined benefit pension plans Accumulated other comprehensive income Balance at December 31, 2019 $ 19,605 $ 95,097 $ — $ 114,702 Net change 45,008 94,993 — 140,001 Balance at September 30, 2020 $ 64,613 $ 190,090 $ — $ 254,703 Nine Months Ended September 30, 2019 Unrealized gains (losses) on securities available-for-sale Unrealized gains (losses) on derivative instruments designated as cash flow hedges Unrealized losses on defined benefit pension plans Accumulated other comprehensive income (loss) Balance at December 31, 2018 $ (24,279 ) $ (18,305 ) $ (328 ) $ (42,912 ) Net change 48,074 145,243 — 193,317 Balance at September 30, 2019 $ 23,795 $ 126,938 $ (328 ) $ 150,405

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2020
Subsequent Events [Abstract]
Subsequent Events	Note 19—Subsequent Events On October 21, 2020, the Board of Directors of Cadence Bancorporation declared a quarterly cash dividend in the amount of $0.075 per share of outstanding common stock, representing an annualized dividend of $0.30 per share. The dividend will be paid on November 16, 2020 to holders of record of Cadence’s Class A common stock on November 2, 2020.

Summary of Accounting Policies

Summary of Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Basis of Presentation and Consolidation	Basis of Presentation and Consolidation The accompanying unaudited consolidated financial statements for the Company have been prepared in accordance with instructions to the SEC Form 10-Q and Article 10 of Regulation S-X; therefore, they do not include all information and footnotes necessary for a fair presentation of financial position, results of operations, comprehensive income, and cash flows in conformity with accounting principles generally accepted in the United States of America (“GAAP”). All adjustments consisting of normally recurring accruals that, in the opinion of management, are necessary for a fair presentation of the consolidated financial position and results of operations for the periods covered by this report have been included. These interim financial statements should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2019. Operating results for the period ended September 30, 2020 are not necessarily indicative of the results that may be expected for the year ending December 31, 2020. 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 unaudited 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 (see Note 15). Certain amounts reported in prior years have been reclassified to conform to the 2020 presentation. These reclassifications did not materially impact the Company’s consolidated balance sheets or consolidated statements of operations. In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 855, Subsequent Events
Nature of Operations	Nature of Operations The Company’s primary subsidiary is 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 full banking services in six southern states: Alabama, Florida, Georgia, Mississippi, Tennessee, and Texas. The Bank’s operating subsidiaries include: • Linscomb & Williams, Inc. — financial advisory firm; • Cadence Investment Services, Inc. — provides investment and insurance products; and • Altera Payroll and Insurance, Inc. — provides payroll processing services and the sale of certain 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 goodwill, intangible assets, and deferred income taxes.
Related Party Transactions	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. The aggregate balances of related party loans and deposits are insignificant as of September 30, 2020 and December 31, 2019.
Loans and Allowances for Credit Losses	Loans and Allowances for Credit Losses (“ACL”) In June 2016, the FASB issued Accounting Standards Update (“ASU”) No. 2016-13, Financial Instruments–Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments Codification Improvements to Topic 326, Financial Instruments–Credit Losses Codification Improvements to Topic 326, Financial Instruments–Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments Financial Instruments–Credit Losses (Topic 326): Targeted Transition Relief Financial Instruments–Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842): Effective Dates Codification Improvements to Topic 326, Financial Instruments–Credit Losses • Replaces 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. • Eliminates existing guidance for acquired credit impaired (“ACI”) loans and requires recognition of the nonaccretable difference as an increase to the allowance for expected credit losses on financial assets purchased with more than insignificant credit deterioration since origination, referred to as purchase credit deteriorated (“PCD”) assets, which will be offset by an increase in the amortized cost of the related loans. For ACI loans accounted for under ASC 310-30 prior to adoption, the guidance in this amendment for PCD assets will be prospectively applied. • Requires inclusion of expected recoveries, limited to the cumulative amount of prior write-offs, when estimating the allowance for credit losses for in-scope financial assets (including collateral dependent assets). • Amends existing impairment guidance for available-for-sale securities to incorporate an allowance, which will allow for reversals of credit impairments if the credit of an issuer improves. • 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 Company adopted ASC 326 and additional related guidance effective January 1, 2020, using the cumulative effect method. As a result of this adoption, the Company recognized an adjustment to retained earnings of $62.8 million, recorded a deferred tax asset of $19.5 million, and reclassed ACL of $6.1 million with respect to PCD loans, formerly ACI loans, as of January 1, 2020. Because the Company adopted ASC 326 with a cumulative effect adjustment as of January 1, 2020, the comparative results as of December 31, 2019, and for the three and nine months ended September 30, 2019, have not been restated and continue to be reported under the incurred loss accounting model. The Company has elected the transition provisions provided by the banking agencies and will phase in the regulatory capital effects of the “Day One” and subsequent provisions for loan losses resulting from adoption of CECL. See Note 12 for additional disclosure. Other changes to the Company’s significant accounting policies pertaining to Loans and the ACL as incorporated under ASC 326 are as follows: • In accordance with ASC 326, the Company uses amortized cost as a basis for determining the ACL; whereas, prior to adopting ASC 326, under the incurred loss accounting model the Company used recorded investment. The components of amortized cost include unpaid principal balance (“UPB”), unamortized discounts and premiums, and unamortized deferred fees and costs. As permitted by ASC 326, the Company has elected to not include accrued interest receivable in the determination of amortized cost and measurement of expected credit losses and, instead, has an accounting policy to write off accrued interest deemed uncollectible in a timely manner. • ASC 326 provides special initial recognition and measurement for the Day One accounting for PCD assets. o ASC 326 requires entities that purchase certain financial assets (or portfolios of financial assets) with the intention of holding them for investment to determine whether the assets have experienced more-than-insignificant deterioration in credit quality since origination. o More-than-insignificant deterioration will generally be determined by the asset’s delinquency status, risk rating changes, credit rating, accruing status or other indicators of credit deterioration since origination. o An entity initially measures the amortized cost of a PCD asset by adding the acquisition date estimate of expected credit losses to the asset’s purchase price. Because the initial estimate for expected credit losses is added to the purchase price to establish the Day One amortized cost, PCD accounting is commonly referred to as a “gross-up” approach. There is no credit loss expense recognized upon acquisition of a PCD asset; rather the “gross-up” is offset by establishment of the initial allowance. o After initial recognition, the accounting for a PCD asset will generally follow the credit loss model. o Interest income for a PCD asset is recognized using the effective interest rate (“EIR”) calculated at initial measurement. This EIR is determined by comparing the amortized cost basis of the instrument to its contractual cash flows, consistent with ASC 310-20. Accordingly, since the PCD gross-up is included in the amortized cost, the purchase discount related to estimated credit losses on acquisition is not accreted into interest income. Only the noncredit-related discount or premium is accreted or amortized, using the EIR that was calculated at the time the asset was acquired. • Commercial loans are generally placed on nonaccrual status when principal or interest is past due 90 days or more unless the loan is well secured and in the process of collection. 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. Prior to the adoption of ASC 326, the majority of our current PCD loans were treated as accruing loans as the Company was able to reasonably predict future cash flows at the unit of account or pool level. After adoption, the accruing status of each individual loan will be subject to the nonaccrual polices described above. • 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 amortized costs in the loan is deemed fully collectible. The ACL is maintained through charges to income in the form of a provision for credit losses at a level management believes is adequate to absorb an estimate of expected credit losses over the contractual life of the loan portfolio 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. The following is a description of the Company’s process for estimating the ACL for all loans in its portfolio, including PCD loans: • The quantitative component of the Company’s ACL model includes three segments: commercial (“C&I”), commercial real estate (“CRE”), and consumer. o The C&I loan segment includes loans to clients in specialized industries, including restaurant, healthcare, and technology. Additional commercial lending activities include energy, general corporate loans, business banking and community banking loans. The C&I segment uses loan level through-the-cycle probability-of-default (“PD”) and loss-given-default (“LGD”) ratings generated by Cadence’s scorecards. These PD ratings are conditioned by industry to reflect the effect of certain forecasted macroeconomic variables, such as market value, interest rate spreads, and unemployment rate. o The CRE loan segment includes loans which are secured by a variety of property types, including multi-family dwellings, office buildings, industrial properties, and retail facilities. The Company offers construction financing, acquisition or refinancing of properties primarily located in our markets in Texas and the southeast United States. The CRE loan segment uses a loss-rate model, where lifetime loss rates are correlated closely with characteristics such as origination LTV, vintage/origination quality, and loan age, as well as with macroeconomic factors, including GDP growth rate, unemployment rate, and CRE market price change. o The consumer loan segment primarily consists of one-to-four family residential real estate loans with terms ranging from 10 to 30 years; however, the portfolio is heavily weighted to the 30-year term. The Company offers both fixed and adjustable interest rates and does not originate subprime loans. These loans are typically closed-end first lien loans for purposes of purchasing property, or for refinancing existing loans with or without cash out. Our loans are primarily owner occupied, full documentation loans. This segment also offers consumer loans to our customers for personal, family and household purposes, auto, boat and personal installment loans, however, these loans are a small percentage of the portfolio. The consumer loan segment uses a loss-rate model. Life-time loss rates capture the effect of credit score , loan age, size, and other loan characteristics and include Cadence’s own assumptions for LGD and the expected life of the loan. The loss rates are also affected by macroeconomic variables such as the unemployment rate, retails sales percent change year-over-year, household employment percent change year-over-year, Federal Housing Finance Agency (“ FHFA ”) home price index, housing affordability index at origination, and median house price. o When foreclosure of collateral securing a loan is probable, ASC 326 requires that the expected credit loss on a loan be measured based on the fair value of the collateral. When management’s measured value of the impaired loan is less than the amortized cost 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 evaluated are excluded from the collective evaluations described above. 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. o For any collateral dependent loan where foreclosure is not probable, but repayment is expected to be provided primarily from the sale or operation of the collateral and the borrower is experiencing financial difficulty, a practical expedient for measuring the credit loss is allowed using the fair value of the collateral. The Company expects to elect this for qualifying credits particularly when there are unique risk characteristics which prohibit them from being collectively evaluated. When repayment will be from the operation of the collateral, generally fair value is estimated on the present value of expected cash flows from the operation of the collateral (an income approach). When repayment is expected from the sale of the collateral, the present value of the costs to sell will be deducted from the fair value of the collateral measured as of the measurement date. • As described above, loans included in each segment are collectively or individually evaluated to determine an expected credit loss which is allocated to the individual loans. Due to the growth of the credit portfolio into new geographic areas and into new commercial markets 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 the Company’s 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 models 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. • ASC 326 acknowledges that, because historical experience may not fully reflect an institution's expectations about the future, the institution should adjust historical loss information, as necessary, to reflect the current conditions and reasonable and supportable forecasts not already reflected in the historical loss information. The quantitative models use baseline macroeconomic scenario forecast data provided by a nationally recognized rating agency for a reasonable and supportable period in estimating the current expected credit losses. The Company has elected an input reversion approach whereby the selected economic forecast for the identified macroeconomic variables revert to their historical trends. As a rule, the forecasts revert to their long-term equilibrium within two to five years or one “business cycle” depending on the segment. The Company monitors actual loss experience for each loan segment for adjustments required to the loss rates utilized. • Additionally, to adjust historical credit loss information for current conditions and reasonable and supportable forecasts, all significant factors relevant to determining the expected collectability of financial assets as of each reporting date should be considered. ASC 326 provides examples of factors an institution may consider. The banking regulatory agencies believe the qualitative or environmental factors identified in the December 2006 Interagency Policy Statement on the Allowance for Loan and Lease Losses should continue to be relevant under CECL and are covered by the examples of factors that may be considered under ASC 326. These factors require judgments that cannot be subjected to exact mathematical calculation. There are no formulas for translating them into a basis-point adjustment to be applied to historical losses. The adjustment must reflect management’s overall estimate of the extent to which expected losses on a segment of loans will differ from historical loss experience. It would include management’s opinion on the effects related to current conditions and reasonable and supportable forecasts, that are not already reflected in the quantitative loss estimate. These adjustments are highly subjective estimates that will be determined each quarter. To facilitate this process, management has developed certain analyses of selected internal and external data to assist management in determining the risk of imprecision. These primary adjustment factors include, but are not limited to the following: o Lending policies, procedures, practices or philosophy, including underwriting standards and collection, charge-off and recovery practices o 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 o Changes in the nature or size of the portfolio o Changes in portfolio collateral values o Changes in the experience, ability, and depth of lending management, and other relevant staff o 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 o Quality of the institution’s credit review system and processes and the degree of oversight by bank management and the board of directors o Concentrations of credit such as industry and lines of business o Competition and legal and regulatory requirements or other external factors • 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), adversely rated letters of credit, and adversely rated lines of credit. Unfunded commitment volatility is calculated on a trailing nine quarter basis; the resulting expected funding amount is then reserved for based on the current combined reserve rate of the funded portfolio. Adversely rated letters and lines 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 the provision for losses on unfunded commitments is included in the provision for credit losses. Prior to adoption, the provision for losses on unfunded commitments was recorded in other noninterest expense. As of September 30, 2020 and December 31, 2019, the reserve for unfunded commitments totaled $2.4 million and $2.0 million, respectively.
Recently Adopted and Pending Accounting Pronouncements	Recently Adopted Accounting Pronouncements In January 2017, the FASB issued ASU No. 2017-04, Intangibles–Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework–Changes to the Disclosure Requirements for Fair Value Measurement In August 2018, the FASB issued ASU No. 2018-15, Intangibles–Goodwill and Other–Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force) . This standard aligns the requirements for capitalizing implementation costs in a hosting arrangement service contract with the existing guidance for capitalizing implementation costs incurred for an internal-use software license. This standard also requires capitalizing or expensing implementation costs based on the nature of the costs and the project stage during which they are incurred and establishes additional disclosure requirements. This standard became effective for Cadence on January 1, 2020. The adoption of this guidance had no material impact on the consolidated financial statements. In October 2018, the FASB issued ASU No. 2018-17, Consolidation (Topic 810): Targeted Improvements to Related Party Guidance for Variable Interest Entities In April 2019, the FASB issued ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments–Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments The credit losses and hedging amendments have the same effective dates as the respective standards, unless an entity has already adopted the standards. The adoption of the credit loss standard, or CECL, is discussed above. Since the Company early adopted the guidance in ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities In February 2020, the FASB issued ASU No. 2020-02, Financial Instruments—Credit Losses (Topic 326) and Leases (Topic 842)—Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 119 and Update to SEC Section on Effective Date Related to Accounting Standards Update No. 2016-02, Leases (Topic 842) (SEC Update) In March 2020, the FASB issued ASU No. 2020-03, Codification Improvements to Financial Instruments In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting P ending Accounting Pronouncements In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes In January 2020, the FASB issued ASU No. 2020-01, Investments—Equity Securities (Topic 321), Investments—Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815)—Clarifying the Interactions between Topic 321, Topic 323, and Topic 815 (a consensus of the FASB Emerging Issues Task Force) In August 2020, the FASB issued ASU No. 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity

Business Combinations (Tables)

Business Combinations (Tables)	9 Months Ended
	Sep. 30, 2020
Business Combinations [Abstract]
Summary of Purchase Price Allocation and Consideration Paid	The following table provides the purchase price allocation and the consideration paid for State Bank’s net assets. (In thousands, except shares and per share data) As Recorded by Cadence Assets Cash and cash equivalents $ 414,342 Investment securities available-for-sale 667,865 Loans held for sale 148,469 Loans 3,317,897 Premises and equipment 65,646 Cash surrender value of life insurance 69,252 Intangible assets 117,038 Other assets 47,146 Total assets acquired $ 4,847,655 Liabilities Deposits $ 4,096,665 Short term borrowings 23,899 Other liabilities 76,368 Total liabilities assumed 4,196,932 Net identifiable assets acquired over liabilities assumed 650,723 Goodwill 175,657 Net assets acquired over liabilities assumed $ 826,380 Consideration: Cadence Bancorporation common shares issued 49,232,008 Fair value per share of the Company's common stock $ 16.78 Company common stock issued 826,113 Fair value of unexercised warrants 267 Fair value of total consideration transferred $ 826,380

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2020
Investments Debt And Equity Securities [Abstract]
Summary of Amortized Cost and Estimated Fair Value of Securities Available-for-Sale	A summary of amortized cost and estimated fair value of securities available-for-sale at September 30, 2020 and December 31, 2019 is as follows: (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value September 30, 2020 Securities available-for-sale: Obligations of U.S. government agencies $ 158,573 $ 590 $ 1,326 $ 157,837 Mortgage-backed securities issued or guaranteed by U.S. agencies (MBS) Residential pass-through: Guaranteed by GNMA 108,291 2,617 79 110,829 Issued by FNMA and FHLMC 1,857,808 48,494 853 1,905,449 Other residential mortgage-backed securities 229,095 6,415 — 235,510 Commercial mortgage-backed securities 342,898 14,115 663 356,350 Total MBS 2,538,092 71,641 1,595 2,608,138 Obligations of states and municipal subdivisions 310,023 13,376 675 322,724 Total securities available-for-sale $ 3,006,688 $ 85,607 $ 3,596 $ 3,088,699 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value December 31, 2019 Securities available-for-sale: Obligations of U.S. government agencies $ 69,464 $ 57 $ 415 $ 69,106 Mortgage-backed securities issued or guaranteed by U.S. agencies (MBS) Residential pass-through: Guaranteed by GNMA 98,122 1,205 245 99,082 Issued by FNMA and FHLMC 1,423,771 13,128 1,402 1,435,497 Other residential mortgage-backed securities 292,019 4,197 384 295,832 Commercial mortgage-backed securities 276,533 2,448 3,023 275,958 Total MBS 2,090,445 20,978 5,054 2,106,369 Obligations of states and municipal subdivisions 185,882 7,235 — 193,117 Total securities available-for-sale $ 2,345,791 $ 28,270 $ 5,469 $ 2,368,592
Schedule of Contractual Maturities of Securities Available-for-Sale	The scheduled contractual maturities of securities available-for-sale at September 30, 2020 were as follows: Amortized Estimated (In thousands) Cost Fair Value Due in one year or less $ 1,333 $ 1,335 Due after one year through five years 1,239 1,228 Due after five years through ten years 100,382 100,466 Due after ten years 365,642 377,532 Mortgage-backed securities 2,538,092 2,608,138 Total $ 3,006,688 $ 3,088,699
Summary of Gross Gains, and Gross Losses on Sales of Securities Available for Sale	Gross gains and gross losses on sales of securities available-for-sale for the three and nine months ended September 30, 2020 and 2019 are presented below. For the Three Months Ended September 30, For the Nine Months Ended September 30, (In thousands) 2020 2019 2020 2019 Gross realized gains $ 79 $ 1,406 $ 5,359 $ 3,219 Gross realized losses — 631 — 1,518 Realized gains, net $ 79 $ 775 $ 5,359 $ 1,701
Schedule of Securities Classified as Available-for-Sale with Gross Unrealized Losses Aggregated by Category and Length of Time	Information pertaining to Unrealized Loss Analysis Losses < 12 Months Losses > 12 Months (In thousands) Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses September 30, 2020 Obligations of U.S. government agencies $ 102,193 $ 1,123 $ 12,114 $ 203 Mortgage-backed securities 276,079 1,580 1,788 15 Obligations of states and municipal subdivisions 66,377 675 — — Total $ 444,649 $ 3,378 $ 13,902 $ 218 Unrealized Loss Analysis Losses < 12 Months Losses > 12 Months (In thousands) Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses December 31, 2019 Obligations of U.S. government agencies $ 33,053 $ 209 $ 13,703 $ 206 Mortgage-backed securities 708,991 4,466 61,506 588 Obligations of states and municipal subdivisions — — — — Total $ 742,044 $ 4,675 $ 75,209 $ 794

Loans Held for Sale, Loans an_2

Loans Held for Sale, Loans and Allowance for Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2020
Receivables [Abstract]
Summary of Loans Held for Sale by Portfolio Segment	The following table presents a summary of the loans held for sale by portfolio segment at the lower of amortized cost or fair value as of September 30, 2020 and December 31, 2019. (In thousands) September 30, 2020 December 31, 2019 Commercial and industrial $ 38,229 $ 34,767 Commercial real estate 707 49,894 Consumer 15,164 2,988 Total loans held for sale (1) $ 54,100 $ 87,649 (1) $0.1 million and $0.4 million of net accrued interest receivable is excluded from the loan balances above as of September 30, 2020 and December 31, 2019, respectively.
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 September 30, 2020 and December 31, 2019. Outstanding balances include originated loans, Acquired Noncredit Impaired (“ANCI”) loans, and Purchase Credit Deteriorated (“PCD”) loans, formerly referred to as Acquired Credit Impaired (“ACI”) loans. See Note 1 for additional information regarding the adoption of the new CECL accounting standard. (In thousands) September 30, 2020 December 31, 2019 (2) Commercial and industrial General C&I $ 4,742,480 $ 4,517,016 Energy 1,391,176 1,419,957 Restaurant 1,091,862 1,027,421 Healthcare 543,604 474,264 Total commercial and industrial 7,769,122 7,438,658 Commercial real estate Industrial, retail, and other 1,717,706 1,691,694 Multifamily 854,651 659,902 Office 540,520 535,676 Total commercial real estate 3,112,877 2,887,272 Consumer Residential 2,497,815 2,568,295 Other 85,742 89,430 Total consumer 2,583,557 2,657,725 Total (1) $ 13,465,556 $ 12,983,655 (1) $48.5 million and $44.5 million of net accrued interest receivable is excluded from the total loan balances above as of September 30, 2020 and December 31, 2019, respectively. (2) December 31, 2019 balances have been reclassified to conform to 2020 presentation for comparability purposes.
Summary of PPP Loans by Portfolio Segment and Class of Financing Receivable	The following table presents the Company’s PPP loans by portfolio segment and class of financing receivable as of September 30, 2020. (In thousands) Amortized Cost % of PPP Portfolio Commercial and industrial General C&I $ 738,520 70.0 % Energy 79,192 7.5 Restaurant 142,099 13.5 Healthcare 95,027 9.0 Total PPP loans $ 1,054,838 100.0 % As a % of total loans 7.8 %
Summary of Allowance for Credit Losses	The following tables provide a summary of the activity in the ACL and the reserve for unfunded commitments for the three and nine months ended September 30, 2020 and 2019 . For the Three Months Ended September 30, 2020 (In thousands) Commercial and Industrial Commercial Real Estate Consumer Total Allowance for Credit Losses Reserve for Unfunded Commitments (1) Total As of June 30, 2020 $ 217,796 $ 112,480 $ 40,625 $ 370,901 $ 3,827 $ 374,728 Provision for credit losses 1,562 33,262 (419 ) 34,405 (1,432 ) 32,973 Charge-offs (18,604 ) (2,978 ) (248 ) (21,830 ) — (21,830 ) Recoveries 1,443 244 249 1,936 — 1,936 As of September 30, 2020 $ 202,197 $ 143,008 $ 40,207 $ 385,412 $ 2,395 $ 387,807 (1) The reserve for unfunded commitments is included in other liabilities on the consolidated balance sheets at September 30, 2020 and June 30, 2020. For the Nine Months Ended September 30, 2020 (In thousands) Commercial and Industrial Commercial Real Estate Consumer Total Allowance for Credit Losses Reserve for Unfunded Commitments (1) Total As of December 31, 2019 $ 89,796 $ 15,319 $ 14,528 $ 119,643 $ 1,699 $ 121,342 Cumulative effect of adoption of CECL 32,951 20,599 22,300 75,850 332 76,182 As of January 1, 2020 122,747 35,918 36,828 195,493 2,031 197,524 Provision for credit losses 160,570 110,420 3,859 274,849 364 275,213 Charge-offs (83,406 ) (3,784 ) (1,190 ) (88,380 ) — (88,380 ) Recoveries 2,286 454 710 3,450 — 3,450 As of September 30, 2020 $ 202,197 $ 143,008 $ 40,207 $ 385,412 $ 2,395 $ 387,807 Allocation of ending ACL Loans collectively evaluated $ 177,035 $ 139,972 $ 40,207 $ 357,214 Loans individually evaluated 25,162 3,036 — 28,198 ACL as of September 30, 2020 $ 202,197 $ 143,008 $ 40,207 $ 385,412 Loans (amortized cost) Loans collectively evaluated $ 7,630,702 $ 3,087,553 $ 2,581,110 $ 13,299,365 Loans individually evaluated 138,420 25,324 2,447 166,191 Loans as of September 30, 2020 (2) $ 7,769,122 $ 3,112,877 $ 2,583,557 $ 13,465,556 (1) The reserve for unfunded commitments is included in other liabilities on the consolidated balance sheets at September 30, 2020 and December 31, 2019. (2) $48.5 million of net accrued interest receivable is excluded from the loan balances above as of September 30, 2020. For the Three Months Ended September 30, 2019 (In thousands) Commercial and Industrial Commercial Real Estate Consumer Small Business Total Allowance for Credit Losses As of June 30, 2019 $ 82,446 $ 13,417 $ 14,464 $ 5,018 $ 115,345 Provision for credit losses 36,660 4,590 1,256 1,258 43,764 Charge-offs (29,632 ) (542 ) (555 ) (921 ) (31,650 ) Recoveries 183 42 79 10 314 As of September 30, 2019 (1) $ 89,657 $ 17,507 $ 15,244 $ 5,365 $ 127,773 (1) Allowance for credit losses and loan balances as calculated and reported under the incurred loss accounting model and reported at September 30, 2019. For the Nine Months Ended September 30, 2019 (In thousands) Commercial and Industrial Commercial Real Estate Consumer Small Business Total Allowance for Credit Losses As of December 31, 2018 $ 66,316 $ 10,452 $ 13,703 $ 3,907 $ 94,378 Provision for credit losses 70,611 7,893 2,702 2,695 83,901 Charge-offs (48,093 ) (880 ) (1,323 ) (1,272 ) (51,568 ) Recoveries 823 42 162 35 1,062 As of September 30, 2019 (1) $ 89,657 $ 17,507 $ 15,244 $ 5,365 $ 127,773 Allocation of ending ACL Loans collectively evaluated for impairment $ 74,341 $ 14,695 $ 15,061 $ 5,304 $ 109,401 Loans individually evaluated for impairment 15,316 2,812 183 61 18,372 ACL as of September 30, 2019 (1) $ 89,657 $ 17,507 $ 15,244 $ 5,365 $ 127,773 Loans Loans collectively evaluated for impairment $ 7,231,114 $ 2,878,461 $ 2,720,110 $ 748,666 $ 13,578,351 Loans individually evaluated for impairment 109,517 22,835 3,112 2,264 137,728 Loans as of September 30, 2019 (1) $ 7,340,631 $ 2,901,296 $ 2,723,222 $ 750,930 $ 13,716,079 (1) Allowance for credit losses and loan balances as calculated and reported under the incurred loss accounting model and reported at September 30, 2019.
Summary of Credit Quality Indicator and by Origination Year	The following table provides information by each credit quality indicator and by origination year (vintage) as of September 30, 2020. The Company defines origination year (vintage) for the purposes of disclosure as the year of execution of the original loan agreement. Loans that are modified as a TDR are considered to be a continuation of the original loan, therefore the origination date of the original loan is reflected as the vintage date. This presentation is consistent with the vintage determination used in the ACL model. The criticized loans with a 2020 vintage relate to credits in resolution. Amortized Cost Basis by Origination Year Revolving Credits (In thousands) 2020 2019 2018 2017 2016 2015 and Prior Revolving Loans Converted to Term Loans Total Commercial and industrial Pass $ 1,494,709 $ 662,526 $ 934,739 $ 603,527 $ 379,457 $ 594,818 $ 2,194,250 $ 13,892 $ 6,877,918 Special mention 137 27,273 39,861 39,407 1,061 29,014 179,300 140 316,193 Substandard 3,236 12,473 131,694 50,298 45,845 110,501 195,504 750 550,301 Doubtful — — 12,141 746 3,621 5,823 2,379 — 24,710 Total commercial and industrial 1,498,082 702,272 1,118,435 693,978 429,984 740,156 2,571,433 14,782 7,769,122 Commercial real estate Pass 301,332 520,504 756,079 579,773 234,644 451,972 99,197 242 2,943,743 Special mention 512 9,379 13,778 44,420 1,408 24,644 193 — 94,334 Substandard — 210 17,303 19,544 25,897 8,543 274 — 71,771 Doubtful — — 3,029 — — — — — 3,029 Total commercial real estate 301,844 530,093 790,189 643,737 261,949 485,159 99,664 242 3,112,877 Consumer Current 342,767 448,653 541,114 291,380 274,699 430,059 227,054 962 2,556,688 30-59 days past due — 776 3,710 157 1,506 1,658 740 — 8,547 60-89 days past due — 379 1,347 181 1,226 1,588 — — 4,721 90+ days past due — 351 7,062 1,014 541 4,614 19 — 13,601 Total consumer 342,767 450,159 553,233 292,732 277,972 437,919 227,813 962 2,583,557 Total (1) $ 2,142,693 $ 1,682,524 $ 2,461,857 $ 1,630,447 $ 969,905 $ 1,663,234 $ 2,898,910 $ 15,986 $ 13,465,556 (1) $48.5 million of net accrued interest receivable is excluded from the loan balances above as of September 30, 2020.
Past Due Financing Receivables	The following tables provide an aging analysis of past due loans by portfolio segment and class of financing receivable. Age Analysis of Past-Due Loans as of September 30, 2020 90+ Days (In thousands) 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due Total Current Total (1) Past Due and Accruing Commercial and industrial General C&I $ 7,038 $ 4,663 $ 7,326 $ 19,027 $ 4,723,453 $ 4,742,480 $ 145 Energy 2,864 — 26,055 28,919 1,362,257 1,391,176 — Restaurant 301 1 21,013 21,315 1,070,547 1,091,862 203 Healthcare 225 90 639 954 542,650 543,604 — Total commercial and industrial 10,428 4,754 55,033 70,215 7,698,907 7,769,122 348 Commercial real estate Industrial, retail, and other 1,083 755 1,951 3,789 1,713,917 1,717,706 148 Multifamily 88 — — 88 854,563 854,651 — Office 48 — 16,267 16,315 524,205 540,520 — Total commercial real estate 1,219 755 18,218 20,192 3,092,685 3,112,877 148 Consumer Residential 8,085 4,687 13,249 26,021 2,471,794 2,497,815 6,414 Other 462 34 352 848 84,894 85,742 350 Total consumer 8,547 4,721 13,601 26,869 2,556,688 2,583,557 6,764 Total $ 20,194 $ 10,230 $ 86,852 $ 117,276 $ 13,348,280 $ 13,465,556 $ 7,260 (1) $48.5 million of net accrued interest receivable is excluded from the loan balances above as of September 30, 2020. Age Analysis of Past-Due Loans as of December 31, 2019 90+ Days (In thousands) 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due Total Current Total (1) Past Due and Accruing Commercial and industrial General C&I $ 23,143 $ 1,117 $ 15,183 $ 39,443 $ 4,477,573 $ 4,517,016 $ 85 Energy — — 8,166 8,166 1,411,791 1,419,957 — Restaurant 1,219 1,284 8,021 10,524 1,016,897 1,027,421 108 Healthcare 497 41 4,143 4,681 469,583 474,264 — Total commercial and industrial 24,859 2,442 35,513 62,814 7,375,844 7,438,658 193 Commercial real estate Industrial, retail, and other 3,354 133 2,255 5,742 1,685,952 1,691,694 — Multifamily — — — — 659,902 659,902 — Office 253 — 1,219 1,472 534,204 535,676 — Total commercial real estate 3,607 133 3,474 7,214 2,880,058 2,887,272 — Consumer Residential 8,967 6,101 7,292 22,360 2,545,935 2,568,295 887 Other 192 37 54 283 89,147 89,430 40 Total consumer 9,159 6,138 7,346 22,643 2,635,082 2,657,725 927 Total $ 37,625 $ 8,713 $ 46,333 $ 92,671 $ 12,890,984 $ 12,983,655 $ 1,120 (1) $44.5 million of net accrued interest receivable is excluded from the loan balances above as of December 31, 2019.
Summary of Nonaccruing Loans by Portfolio Segment and Class of Financing Receivable	The following table provides information about nonaccruing loans by portfolio segment and class of financing receivable as of and for the three and nine months ended September 30, 2020. Nonaccrual Loans - Amortized Cost 90+ Days Interest Income Recognized (In thousands) Beginning of the Period (1) End of the Period No Allowance Recorded Past Due and Accruing (2) Three Months Ended September 30, 2020 Nine Months Ended September 30, 2020 Commercial and industrial General C&I $ 66,589 $ 36,774 $ 3,671 $ 145 $ 4 $ 22 Energy 9,568 48,754 2,864 — 1 10 Restaurant 53,483 59,448 17,191 203 13 51 Healthcare 4,833 1,015 — — — — Total commercial and industrial 134,473 145,991 23,726 348 18 83 Commercial real estate Industrial, retail, and other 5,935 10,475 8,463 148 24 83 Multifamily — — — — — — Office 1,245 16,267 — — — — Total commercial real estate 7,180 26,742 8,463 148 24 83 Consumer Residential 15,101 16,357 2,446 6,414 30 113 Other 24 7 — 350 5 9 Total consumer 15,125 16,364 2,446 6,764 35 122 Total $ 156,778 $ 189,097 $ 34,635 $ 7,260 $ 77 $ 288 (1) Amounts are not comparable to prior period public filings due to our adoption of CECL on January 1, 2020. Prior to this date, pools of individual ACI loans were excluded because they continued to earn interest income from the accretable yield at the pool level. With the adoption of CECL, the pools were discontinued, and performance is based on contractual terms for individual loans. Additionally, prior to January 1, 2020, nonaccrual balances were presented using recorded investment. Upon adoption of CECL, approximately $43.0 million of ACI loans were reclassed to nonaccrual loans. (2) $0.2 million of net accrued interest receivable is excluded from the loan balances above as of September 30, 2020.
Summary of Information Regarding Loans and Types of Loan Modified into TDRs	The following table provides information regarding loans that were modified into TDRs during the periods indicated. For the Three Months Ended September 30, 2020 2019 (Dollars in thousands) Number of TDRs Amortized Cost (1) Number of TDRs Amortized Cost Commercial and industrial General C&I — $ — 1 $ 11,769 Energy — — 1 — Restaurant — — 1 133 Total — $ — 3 $ 11,902 (1) There was no net accrued interest receivable recorded on the loan balances above as of September 30, 2020. For the Nine Months Ended September 30, 2020 2019 (Dollars in thousands) Number of TDRs Amortized Cost (1) Number of TDRs Amortized Cost Commercial and industrial General C&I 4 $ 16,836 3 $ 19,893 Energy 1 8,013 3 6,445 Restaurant 2 20,779 1 133 Commercial real estate Industrial, retail, and other — — 1 1,455 Total 7 $ 45,628 8 $ 27,926 (1) There was no net accrued interest receivable recorded on the loan balances above as of September 30, 2020. The following table provides information regarding the types of loan modifications that were modified into TDRs during the periods indicated. For the Three Months Ended September 30, 2020 2019 Number of Loans Modified by: Rate Concession Modified Terms and/or Other Concessions Rate Concession Modified Terms and/or Other Concessions Commercial and industrial General C&I — — — 1 Energy — — — 1 Restaurant — — — 1 Total — — — 3 For the Nine Months Ended September 30, 2020 2019 Number of Loans Modified by: Rate Concession Modified Terms and/or Other Concessions Rate Concession Modified Terms and/or Other Concessions Commercial and industrial General C&I — 4 — 3 Energy 1 — — 3 Restaurant — 2 — 1 Commercial real estate Industrial, retail, and other — — — 1 Total 1 6 — 8

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 and December 31, 2019: (In thousands) September 30, 2020 December 31, 2019 Goodwill $ 43,061 $ 485,336 Core deposit intangible, net of accumulated amortization of $75,291 and $60,836, respectively 76,331 90,788 Customer lists, net of accumulated amortization of $23,609 and $21,908, respectively 10,242 11,993 Noncompete agreements, net of accumulated amortization of $286 and $137, respectively 1,070 1,473 Trademarks, net of accumulated amortization of $133 and $75, respectively 1,301 1,359 Total goodwill and intangible assets, net $ 132,005 $ 590,949
Summary of Changes to Carrying Amount of Goodwill by Segment	The following table represents changes to the carrying amount of goodwill by segment for the period reported. (In thousands) Banking Financial Services Corporate Consolidated Balance as of December 31, 2019 $ 442,579 $ 42,757 $ — $ 485,336 Additions: Wealth & Pension acquisition — 304 — 304 Other 1,116 — — 1,116 Losses: Impairment (443,695 ) — — (443,695 ) Balance as of September 30, 2020 $ — $ 43,061 $ — $ 43,061

Derivatives (Tables)

Derivatives (Tables)	9 Months Ended
	Sep. 30, 2020
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Schedule of Notional Amounts and Estimated Fair Values	The notional amounts and estimated fair values as of September 30, 2020 and December 31, 2019 were as follows: September 30, 2020 December 31, 2019 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 $ 350,000 $ 25,558 $ — $ 350,000 $ — $ 643 Commercial loan interest rate collars — — — 4,000,000 239,213 — Total derivatives designated as hedging instruments 350,000 25,558 — 4,350,000 239,213 643 Derivatives not designated as hedging instruments: Commercial loan interest rate swaps 1,246,712 24,935 1,976 1,008,805 8,386 899 Commercial loan interest rate caps 145,842 3 3 167,185 18 18 Commercial loan interest rate floors 567,496 13,491 13,491 654,298 8,836 8,836 Commercial loan interest rate collars 68,887 468 468 75,555 257 257 Mortgage loan held-for-sale interest rate lock commitments 36,970 566 — 4,138 22 — Mortgage loan forward sale commitments 16,729 137 — 4,109 26 — Mortgage loan held-for-sale floating commitments 8,942 — — 1,523 — — Foreign exchange contracts 147,384 1,388 1,295 74,322 379 558 Total derivatives not designated as hedging instruments 2,238,962 40,988 17,233 1,989,935 17,924 10,568 Total derivatives $ 2,588,962 $ 66,546 $ 17,233 $ 6,339,935 $ 257,137 $ 11,211
Schedule of Gain (Loss) in Consolidated Statements of Operations Related to Derivative Instruments	Pre-tax For the Three Months Ended September 30, 2020 2019 (In thousands) 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 $ 275 $ 1,278 $ — $ 7,447 $ (1,182 ) $ — Commercial loan interest rate collars — 18,432 — 32,864 2,667 — Derivatives not designated as hedging instruments: Mortgage loans held for sale interest rate lock commitments $ — $ — $ 18 $ — $ — $ 23 Foreign exchange contracts — — 590 — — 823 For the Nine Months Ended September 30, 2020 2019 (In thousands) 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 $ 28,356 $ 2,154 $ — $ 28,419 $ (4,199 ) $ — Commercial loan interest rate collars 147,152 43,358 — 160,429 2,704 — Derivatives not designated as hedging instruments: Mortgage loans held for sale interest rate lock commitments $ — $ — $ 544 $ — $ — $ 50 Foreign exchange contracts — — 2,142 — — 2,947
Schedule of Interest Rate Swap Agreements	In 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 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

Borrowed Funds (Tables)

Borrowed Funds (Tables)	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Summary of Debt	Details of the debt transactions are as follows: (In thousands) September 30, 2020 December 31, 2019 Cadence Bancorporation: 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 3-month LIBOR plus 4.663%, subordinated notes, due March 11, 2025, callable in 2020 40,000 40,000 4.750% subordinated notes, due June 30, 2029, callable in 2024 85,000 85,000 Total — Cadence Bancorporation 210,000 210,000 Cadence Bank: 6.250% subordinated notes, due June 28, 2029, callable in 2024 25,000 25,000 Debt issue costs and unamortized premium (1,779 ) (2,350 ) Total senior and subordinated debt $ 233,221 $ 232,650
Summary of Junior Subordinated Debt	The following is a list of junior subordinated debt: (In thousands) September 30, 2020 December 31, 2019 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 (13,077 ) (13,174 ) Total junior subordinated debentures $ 37,542 $ 37,445

Other Noninterest Income and _2

Other Noninterest Income and Other Noninterest Expense (Tables)	9 Months Ended
	Sep. 30, 2020
Other Nonoperating Income Expense [Abstract]
Summary of Other Noninterest Income and Other Noninterest Expense	The detail of other noninterest income and other noninterest expense captions presented in the consolidated statements of operations is as follows: Three Months Ended September 30, Nine Months Ended September 30, (In thousands) 2020 2019 2020 2019 Other noninterest income Insurance revenue $ 239 $ 216 $ 713 $ 658 Mortgage banking income 3,535 1,079 6,666 2,332 Income from bank owned life insurance policies 1,238 1,275 3,786 3,690 Other (1,389 ) 1,730 (3,339 ) 4,710 Total other noninterest income $ 3,623 $ 4,300 $ 7,826 $ 11,390 Three Months Ended September 30, Nine Months Ended September 30, (In thousands) 2020 2019 2020 2019 Other noninterest expenses Data processing expense $ 3,024 $ 3,641 $ 9,460 $ 9,670 Software amortization 4,432 3,406 12,015 9,925 Consulting and professional fees 3,320 2,621 9,035 6,749 Loan related expenses 953 (921 ) 2,448 1,729 FDIC insurance 2,528 527 8,903 4,149 Communications 1,119 1,425 3,278 3,880 Advertising and public relations 716 1,368 3,101 3,253 Legal expenses 681 500 1,672 1,303 Other 8,232 11,864 27,919 29,982 Total other noninterest expenses $ 25,005 $ 24,431 $ 77,831 $ 70,640

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Reconciliation of Basic and Diluted Net Income (Loss) Per Common Share	The following table displays a reconciliation of the information used in calculating basic and diluted net income (loss) per common share for the three and nine months ended September 30, 2020 and 2019. Three Months Ended September 30, Nine Months Ended September 30, (In thousands, except share and per share data) 2020 2019 2020 2019 Net income (loss) per consolidated statements of operations $ 49,315 $ 43,986 $ (406,110 ) $ 150,533 Net income allocated to participating securities (431 ) (137 ) — (525 ) Net income (loss) allocated to common stock $ 48,884 $ 43,849 $ (406,110 ) $ 150,008 Weighted average common shares outstanding (Basic) 125,956,714 128,457,491 126,169,823 129,237,553 Weighted average dilutive restricted stock units and warrants 138,154 57,783 — 121,734 Weighted average common shares outstanding (Diluted) 126,094,868 128,515,274 126,169,823 129,359,287 Earnings (loss) per common share (Basic) $ 0.39 $ 0.34 $ (3.22 ) $ 1.16 Earnings (loss) per common share (Diluted) $ 0.39 $ 0.34 $ (3.22 ) $ 1.16

Regulatory Matters (Tables)

Regulatory Matters (Tables)	9 Months Ended
	Sep. 30, 2020
Banking And Thrifts [Abstract]
Schedule of Actual Capital Amounts and Ratios	The actual capital amounts and ratios for the Company and the Bank as of September 30, 2020 and December 31, 2019 are presented in the following tables and as shown, are above the thresholds necessary to be considered “well-capitalized.” Management believes that no events or changes have occurred after September 30, 2020 that would change this designation. Consolidated Company Bank (In thousands) Amount Ratio Amount Ratio September 30, 2020 Tier 1 leverage $ 1,803,403 9.9 % $ 1,876,954 10.3 % Common equity tier 1 capital 1,803,403 12.0 1,826,954 12.2 Tier 1 risk-based capital 1,803,403 12.0 1,876,954 12.5 Total risk-based capital 2,198,061 14.7 2,089,773 14.0 Minimum requirement: Tier 1 leverage 726,475 4.0 726,824 4.0 Common equity tier 1 capital 673,791 4.5 673,806 4.5 Tier 1 risk-based capital 898,388 6.0 898,408 6.0 Total risk-based capital 1,197,851 8.0 1,197,878 8.0 Well capitalized requirement: Tier 1 leverage N/A N/A 908,530 5.0 Common equity tier 1 capital N/A N/A 973,276 6.5 Tier 1 risk-based capital 898,388 6.0 1,197,878 8.0 Total risk-based capital 1,497,313 10.0 1,497,347 10.0 Consolidated Company Bank (In thousands) Amount Ratio Amount Ratio December 31, 2019 Tier 1 leverage $ 1,784,664 10.3 % $ 1,953,008 11.1 % Common equity tier 1 capital 1,784,664 11.5 1,903,008 12.3 Tier 1 risk-based capital 1,784,664 11.5 1,953,008 12.6 Total risk-based capital 2,120,571 13.7 2,099,146 13.6 Minimum requirement: Tier 1 leverage 690,213 4.0 689,881 4.0 Common equity tier 1 capital 697,089 4.5 696,755 4.5 Tier 1 risk-based capital 929,453 6.0 929,007 6.0 Total risk-based capital 1,239,270 8.0 1,238,676 8.0 Well capitalized requirement: Tier 1 leverage N/A N/A 862,351 5.0 Common equity tier 1 capital N/A N/A 1,006,425 6.5 Tier 1 risk-based capital 929,453 6.0 1,238,676 8.0 Total risk-based capital 1,549,088 10.0 1,548,345 10.0

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Tables)	9 Months Ended
	Sep. 30, 2020
Commitments And Contingencies Disclosure [Abstract]
Summary of Commitments and Contingent Liabilities	(In thousands) September 30, 2020 December 31, 2019 Commitments to extend credit $ 4,283,138 $ 4,667,360 Commitments to grant loans 138,531 292,199 Standby letters of credit 202,724 213,548 Performance letters of credit 21,036 27,985 Commercial letters of credit 21,971 15,587

Disclosure About Fair Values _2

Disclosure About Fair Values of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2020
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 at September 30, 2020 and December 31, 2019: (In thousands) Carrying Value (Level 1) (Level 2) (Level 3) September 30, 2020 Assets Investment securities available-for-sale $ 3,088,699 $ — $ 3,088,699 $ — Derivative assets 66,546 — 66,546 — Other assets 34,521 — — 34,521 Total recurring basis measured assets $ 3,189,766 $ — $ 3,155,245 $ 34,521 Liabilities Derivative liabilities $ 17,233 $ — $ 17,233 $ — Total recurring basis measured liabilities $ 17,233 $ — $ 17,233 $ — (In thousands) Carrying Value (Level 1) (Level 2) (Level 3) December 31, 2019 Assets Investment securities available-for-sale $ 2,368,592 $ — $ 2,368,592 $ — Equity securities with readily determinable fair values not held for trading 1,862 1,862 — — Derivative assets 257,137 — 257,137 — Other assets 26,882 — — 26,882 Total recurring basis measured assets $ 2,654,473 $ 1,862 $ 2,625,729 $ 26,882 Liabilities Derivative liabilities $ 11,211 $ — $ 11,211 $ — Total recurring basis measured liabilities $ 11,211 $ — $ 11,211 $ —
Summary of Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis	Level 3 Assets Measured at Fair Value on a Recurring Basis For the Three Months Ended September 30, 2020 2019 2020 2019 2020 2019 (In thousands) Net Profits Interests Investments in Limited Partnerships SBA Servicing Rights Beginning Balance $ 3,733 $ 5,376 $ 24,631 $ 14,533 $ 3,737 $ 3,786 Originations — — — — 402 455 Net (losses) gains included in earnings (164 ) (73 ) 232 1,119 233 (489 ) Reclassifications — — — 110 — — Acquired in settlement of loans — — — — — — Contributions paid — — 1,904 1,143 — — Distributions received — (143 ) (187 ) (44 ) — — Ending Balance $ 3,569 $ 5,160 $ 26,580 $ 16,861 $ 4,372 $ 3,752 Net (losses) unrealized gains included in earnings relating to assets held at the end of the period $ (164 ) $ (73 ) $ 232 $ 1,119 $ 233 $ (489 ) Net unrealized gains (losses) recognized in other comprehensive income relating to assets held at the end of the period $ — $ — $ — $ — $ — $ — For the Nine Months Ended September 30, 2020 2019 2020 2019 2020 2019 (In thousands) Net Profits Interests Investments in Limited Partnerships SBA Servicing Assets Beginning Balance $ 4,330 $ 5,779 $ 18,742 $ 11,191 $ 3,810 $ — Acquired — — — — — 6,213 Originations — — — — 962 969 Net (losses) gains included in earnings (761 ) (188 ) (1,099 ) 2,153 (400 ) (3,430 ) Reclassifications — — 1,727 (15 ) — — Acquired in settlement of loans — — 4,257 — — — Contributions paid — — 3,687 4,160 — — Distributions received — (431 ) (734 ) (628 ) — — Ending Balance $ 3,569 $ 5,160 $ 26,580 $ 16,861 $ 4,372 $ 3,752 Net (losses) unrealized gains included in earnings relating to assets held at the end of the period $ (761 ) $ (188 ) $ (1,099 ) $ 2,153 $ (400 ) $ (3,430 ) Net unrealized gains (losses) recognized in other comprehensive income relating to assets held at the end of the period $ — $ — $ — $ — $ — $ —
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 September 30, 2020 and December 31, 2019, 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) September 30, 2020 Loans held for sale $ 54,100 $ — $ 54,100 $ — Individually evaluated loans, net of allocated allowance for credit losses (1) 137,992 — — 137,992 Other real estate and repossessed assets 6,458 — 6,458 Total assets measured on a nonrecurring basis $ 198,550 $ — $ 54,100 $ 144,450 (In thousands) Carrying Value (Level 1) (Level 2) (Level 3) December 31, 2019 Loans held for sale $ 87,649 $ — $ 87,649 $ — Individually evaluated loans, net of allocated allowance for credit losses (1) 101,561 — — 101,561 Other real estate 1,628 — — 1,628 Total assets measured on a nonrecurring basis $ 190,838 $ — $ 87,649 $ 103,189 (1) Prior to the adoption of CECL on January 1, 2020, these loans were known as Impaired loans, net of specific allowance.
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 Weighted Average (2) September 30, 2020 Individually evaluated loans, net of allowance for credit losses (3) $ 137,992 Appraised value, as adjusted Discount to fair value 0% - 78% 28% Discounted cash flow Discount rate 3.75% - 3.91% 3.9% Enterprise value Comparables and average multiplier 4.5x - 6.47x 4.71x Enterprise value Discount rates and comparables 13%-15% 14% Other real estate and repossessed assets 6,458 Appraised value, as adjusted Discount to fair value 0% - 20% 10% Estimated closing costs 10% 10% Quantitative Information about Level 3 Fair Value Measurements (In thousands) Carrying Value Valuation Methods Unobservable Inputs Range December 31, 2019 Individually evaluated loans, net of allowance for credit losses (3) $ 101,561 Appraised value, as adjusted Discount to fair value 0% - 50% Appraised value, as adjusted Minimum guaranteed proceeds per Settlement Agreement 0% (1) Discounted cash flow Discount rate 5.8% 0% (1) Enterprise value Exit and earnings multiples, discounted cash flows, and market comparables 0% - 46% (1) Other real estate 1,628 Appraised value, as adjusted Discount to fair value 0% - 20% Estimated closing costs 10% (1) - Represents difference of remaining balance to fair value. (2) - Weighted averages was calculated using the input attribute and the outstanding balance of the loan (3) - Prior to the adoption of CECL on January 1, 2020, these loans were known as Impaired loans, net of specific allowance.
Summary of Estimated Fair Values of Financial Instruments	The estimated fair values of the Company’s financial instruments are as follows: September 30, 2020 (In thousands) Carrying Amount Fair Value Level 1 Level 2 Level 3 Financial Assets: Cash and due from banks $ 174,549 $ 174,549 $ 174,549 $ — $ — Interest-bearing deposits in other banks 1,067,258 1,067,258 1,067,258 — — Federal funds sold 5,365 5,365 5,365 — — Investment securities available-for-sale 3,088,699 3,088,699 — 3,088,699 — Loans held for sale 54,100 54,100 — 54,100 — Net loans 13,080,144 13,184,043 — — 13,184,043 Derivative assets 66,546 66,546 — 66,546 — Other assets 96,446 96,446 — — 96,446 Financial Liabilities: Deposits 15,786,221 15,796,140 — 15,796,140 — Advances from FHLB 100,000 100,000 — 100,000 — Senior debt 49,978 50,675 — 50,675 — Subordinated debt 183,243 188,153 — 188,153 — Junior subordinated debentures 37,542 40,621 — 40,621 — Notes payable 1,683 1,683 — 1,683 — Derivative liabilities 17,233 17,233 — 17,233 — December 31, 2019 (In thousands) Carrying Amount Fair Value Level 1 Level 2 Level 3 Financial Assets: Cash and due from banks $ 252,447 $ 252,447 $ 252,447 $ — $ — Interest-bearing deposits in other banks 725,343 725,343 725,343 — — Federal funds sold 10,974 10,974 10,974 — — Investment securities available-for-sale 2,368,592 2,368,592 — 2,368,592 — Equity securities with readily determinable fair values not held for trading 1,862 1,862 1,862 — — Loans held for sale 87,649 87,649 — 87,649 — Net loans 12,864,012 12,755,360 — — 12,755,360 Derivative assets 257,137 257,137 — 257,137 — Other assets 72,719 72,719 — — 72,719 Financial Liabilities: Deposits 14,742,794 14,753,192 — 14,753,192 — Advances from FHLB 100,000 100,000 — 100,000 — Senior debt 49,938 51,202 — 51,202 — Subordinated debt 182,712 189,386 — 189,386 — Junior subordinated debentures 37,445 48,012 — 48,012 — Notes payable 2,078 2,078 — 2,078 — Derivative liabilities 11,211 11,211 — 11,211 —

Variable Interest Entities an_2

Variable Interest Entities and Other Investments (Tables)	9 Months Ended
	Sep. 30, 2020
Variable Interest Entities And Other Investments [Abstract]
Summary of Investment in Limited Partnerships	The following table presents a summary of the Company’s investments in limited partnerships as of September 30, 2020 and December 31, 2019: (In thousands) September 30, 2020 December 31, 2019 Affordable housing projects (amortized cost) $ 33,236 $ 28,205 Limited partnerships accounted for under the fair value practical expedient of NAV 26,580 18,742 Limited partnerships without readily determinable fair values that do not qualify for the practical expedient of NAV accounted for under the cost method 6,964 8,681 Limited partnerships required to be accounted for under the equity method 15,886 8,951 Total investments in limited partnerships $ 82,666 $ 64,579
Summary of Carrying Amount of Equity Investments Measured Under Measurement Alternative	The carrying amount of equity investments measured under the measurement alternative are as follows: For the Nine Months Ended September 30, (In thousands) 2020 2019 Carrying value, Beginning of Year $ 8,681 $ 8,714 Reclassifications (1,727 ) 15 Net income change 49 — Distributions (610 ) (1,073 ) Contributions 571 1,865 Carrying value, End of Period $ 6,964 $ 9,521

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Summary of Operating Results of Segments	The following tables present the operating results of the segments as of and for the three and nine months ended September 30, 2020 and 2019: Three Months Ended September 30, 2020 (In thousands) Banking Financial Services Corporate Consolidated Net interest income (expense) $ 157,318 $ (34 ) $ (3,242 ) $ 154,042 Provision for credit losses 32,973 — — 32,973 Noninterest income 20,993 11,517 81 32,591 Noninterest expense 85,510 8,312 1,037 94,859 Income tax expense (benefit) 14,086 404 (5,004 ) 9,486 Net income $ 45,742 $ 2,767 $ 806 $ 49,315 Total assets $ 18,305,151 $ 94,407 $ 4,637 $ 18,404,195 Three Months Ended September 30, 2019 (In thousands) Banking Financial Services Corporate Consolidated Net interest income (expense) $ 164,535 $ (524 ) $ (3,824 ) $ 160,187 Provision for credit losses 43,764 — — 43,764 Noninterest income 23,407 11,052 183 34,642 Noninterest expense 84,113 9,255 915 94,283 Income tax expense (benefit) 13,931 183 (1,318 ) 12,796 Net income (loss) $ 46,134 $ 1,090 $ (3,238 ) $ 43,986 Total assets $ 17,743,054 $ 106,248 $ 6,644 $ 17,855,946 Nine Months Ended September 30, 2020 (In thousands) Banking Financial Services Corporate Consolidated Net interest income (expense) $ 473,316 $ (444 ) $ (10,647 ) $ 462,225 Provision for credit losses 275,213 — — 275,213 Noninterest income (expenses) 65,212 32,691 (293 ) 97,610 Noninterest expense 692,557 25,286 3,290 721,133 Income tax (benefit) expense (30,513 ) 877 (765 ) (30,401 ) Net (loss) income $ (398,729 ) $ 6,084 $ (13,465 ) $ (406,110 ) Total assets $ 18,305,151 $ 94,407 $ 4,637 $ 18,404,195 Nine Months Ended September 30, 2019 (In thousands) Banking Financial Services Corporate Consolidated Net interest income (expense) $ 504,764 $ (1,746 ) $ (12,754 ) $ 490,264 Provision for credit losses 83,901 — — 83,901 Noninterest income 66,557 29,782 688 97,027 Noninterest expense 272,721 24,804 10,727 308,252 Income tax expense (benefit) 49,685 495 (5,575 ) 44,605 Net income (loss) $ 165,014 $ 2,737 $ (17,218 ) $ 150,533 Total assets $ 17,743,054 $ 106,248 $ 6,644 $ 17,855,946

Equity-based Compensation (Tabl

Equity-based Compensation (Tables)	9 Months Ended
	Sep. 30, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Activity Related to Restricted Stock Unit Awards	The following table summarizes the activity related to restricted stock unit awards: For the Nine Months Ended September 30, 2020 2019 Number of Shares Weighted Average Fair Value per Unit at Award Date Number of Shares Weighted Average Fair Value per Unit at Award Date Non-vested at beginning of period 1,229,863 $ 19.97 273,354 $ 26.49 Granted during the period 778,881 7.78 1,163,959 18.53 Vested during the period (237,277 ) 19.61 (117,037 ) 21.05 Forfeited during the period (77,198 ) 18.71 (56,048 ) 20.54 Non-vested at end of period 1,694,269 $ 14.47 1,264,228 $ 19.93

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2020
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 the nine months ended September 30, 2020 and 2019. Nine Months Ended September 30, 2020 (In thousands) Unrealized gains on securities available-for-sale Unrealized gains on derivative instruments designated as cash flow hedges Unrealized gains on defined benefit pension plans Accumulated other comprehensive income Balance at December 31, 2019 $ 19,605 $ 95,097 $ — $ 114,702 Net change 45,008 94,993 — 140,001 Balance at September 30, 2020 $ 64,613 $ 190,090 $ — $ 254,703 Nine Months Ended September 30, 2019 Unrealized gains (losses) on securities available-for-sale Unrealized gains (losses) on derivative instruments designated as cash flow hedges Unrealized losses on defined benefit pension plans Accumulated other comprehensive income (loss) Balance at December 31, 2018 $ (24,279 ) $ (18,305 ) $ (328 ) $ (42,912 ) Net change 48,074 145,243 — 193,317 Balance at September 30, 2019 $ 23,795 $ 126,938 $ (328 ) $ 150,405

Summary of Accounting Policie_2

Summary of Accounting Policies - Additional Information (Details) - USD ($)	Jan. 01, 2020	Sep. 30, 2020	Dec. 31, 2019
Significant Of Accounting Policies [Line Items]
Retained earnings		$ 68,700,000	$ 572,503,000
Reserve for unfunded commitments, amount		2,400,000	$ 2,000,000
Held to maturity securities		$ 0
Accounting Standards Update 2016-13
Significant Of Accounting Policies [Line Items]
Deferred tax asset reclassed amount net	$ 6,100,000
Deferred tax assets	19,500,000
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13 | Revision of Prior Period, Adjustment
Significant Of Accounting Policies [Line Items]
Retained earnings	$ 62,800,000

Business Combinations - Additio

Business Combinations - Additional Information (Details) $ in Thousands	Dec. 31, 2019USD ($)BranchLocationshares	Jul. 01, 2019USD ($)	Sep. 30, 2020USD ($)
Business Acquisition [Line Items]
Goodwill	$ 485,336		$ 43,061
Unfunded commitments	44,900		$ 48,800
Banking Segment
Business Acquisition [Line Items]
Goodwill	442,579
State Bank Financial Corporation
Business Acquisition [Line Items]
Loans added in acquisition	3,317,897
Deposits added in acquisition	$ 4,096,665
Shares issued for business acquisition | shares	49,232,008
Purchase price consideration	$ 826,400
Value of common stock in purchase price	826,113
Fair value of unexercised warrants	267
Goodwill	175,657
Unfunded commitments	26,800
Purchase consideration paid	826,380
Intangible assets with an estimated fair value	$ 117,038
State Bank Financial Corporation | Certificates of Deposit
Business Acquisition [Line Items]
Estimated useful life	12 months
Discount on transaction of certificates of deposit	$ 3,400
State Bank Financial Corporation | Banking Segment
Business Acquisition [Line Items]
Goodwill	175,700
State Bank Financial Corporation | Core Deposit
Business Acquisition [Line Items]
Intangible assets recognized	$ 111,900
Estimated useful life	10 years
State Bank Financial Corporation | Customer Relationship
Business Acquisition [Line Items]
Intangible assets recognized	$ 3,700
Estimated useful life	10 years
State Bank Financial Corporation | Trademark
Business Acquisition [Line Items]
Intangible assets recognized	$ 1,400
Estimated useful life	20 years
State Bank Financial Corporation | Common Class A
Business Acquisition [Line Items]
Common stock in exchange for outstanding common shares | shares	1.271
Shares issued for business acquisition | shares	49,200,000
State Bank Financial Corporation | Georgia
Business Acquisition [Line Items]
Number of branch locations | BranchLocation	32
Wealth & Pension Services Group, Inc. | Linscomb & Williams, Inc.
Business Acquisition [Line Items]
Goodwill		$ 2,900
Purchase consideration paid		8,000
Cash payments		5,200
Future cash payments to acquire certain assets and assume liabilities		$ 2,100
Term of future cash payments		5 years
Intangible assets with an estimated fair value		$ 4,800

Business Combinations - Summary

Business Combinations - Summary of Purchase Price Allocation and Consideration Paid (Details) - USD ($) $ / shares in Units, $ in Thousands	Dec. 31, 2019	Sep. 30, 2020
Liabilities
Goodwill	$ 485,336	$ 43,061
State Bank Financial Corporation
Assets
Cash and cash equivalents	414,342
Investment securities available-for-sale	667,865
Loans held for sale	148,469
Loans	3,317,897
Premises and equipment	65,646
Cash surrender value of life insurance	69,252
Intangible assets	117,038
Other assets	47,146
Total assets acquired	4,847,655
Liabilities
Deposits	4,096,665
Short term borrowings	23,899
Other liabilities	76,368
Total liabilities assumed	4,196,932
Net identifiable assets acquired over liabilities assumed	650,723
Goodwill	175,657
Net assets acquired over liabilities assumed	$ 826,380
Consideration:
Cadence Bancorporation common shares issued	49,232,008
Fair value per share of the Company's common stock	$ 16.78
Company common stock issued	$ 826,113
Fair value of unexercised warrants	267
Fair value of total consideration transferred	$ 826,380

Investment Securities - Summary

Investment Securities - Summary of Amortized Cost and Estimated Fair Value of Securities Available-for-Sale (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Schedule Of Available For Sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	$ 3,006,688	$ 2,345,791
Securities available-for-sale, Gross Unrealized Gains	85,607	28,270
Securities available-for-sale, Gross Unrealized Losses	3,596	5,469
Securities available-for-sale, Estimated Fair Value	3,088,699	2,368,592
Obligations of U.S. Government Agencies
Schedule Of Available For Sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	158,573	69,464
Securities available-for-sale, Gross Unrealized Gains	590	57
Securities available-for-sale, Gross Unrealized Losses	1,326	415
Securities available-for-sale, Estimated Fair Value	157,837	69,106
Residential Pass-through | Guaranteed by GNMA
Schedule Of Available For Sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	108,291	98,122
Securities available-for-sale, Gross Unrealized Gains	2,617	1,205
Securities available-for-sale, Gross Unrealized Losses	79	245
Securities available-for-sale, Estimated Fair Value	110,829	99,082
Residential Pass-through | Issued by FNMA and FHLMC
Schedule Of Available For Sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	1,857,808	1,423,771
Securities available-for-sale, Gross Unrealized Gains	48,494	13,128
Securities available-for-sale, Gross Unrealized Losses	853	1,402
Securities available-for-sale, Estimated Fair Value	1,905,449	1,435,497
Other Residential Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	229,095	292,019
Securities available-for-sale, Gross Unrealized Gains	6,415	4,197
Securities available-for-sale, Gross Unrealized Losses		384
Securities available-for-sale, Estimated Fair Value	235,510	295,832
Commercial Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	342,898	276,533
Securities available-for-sale, Gross Unrealized Gains	14,115	2,448
Securities available-for-sale, Gross Unrealized Losses	663	3,023
Securities available-for-sale, Estimated Fair Value	356,350	275,958
Total MBS
Schedule Of Available For Sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	2,538,092	2,090,445
Securities available-for-sale, Gross Unrealized Gains	71,641	20,978
Securities available-for-sale, Gross Unrealized Losses	1,595	5,054
Securities available-for-sale, Estimated Fair Value	2,608,138	2,106,369
Obligations of States and Municipal Subdivisions
Schedule Of Available For Sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	310,023	185,882
Securities available-for-sale, Gross Unrealized Gains	13,376	7,235
Securities available-for-sale, Gross Unrealized Losses	675
Securities available-for-sale, Estimated Fair Value	$ 322,724	$ 193,117

Investment Securities - Schedul

Investment Securities - Schedule of Contractual Maturities of Securities Available-for-Sale (Details) $ in Thousands	Sep. 30, 2020USD ($)
Investments Debt And Equity Securities [Abstract]
Available-for-Sale, Due in one year or less, Amortized Cost	$ 1,333
Available-for-Sale, Due after one year through five years, Amortized Cost	1,239
Available-for-Sale, Due after five years through ten years, Amortized Cost	100,382
Available-for-Sale, Due after ten years, Amortized Cost	365,642
Available-for-Sale, Mortgage-backed securities, Amortized Cost	2,538,092
Available-for-Sale, Total, Amortized Cost	3,006,688
Available-for-Sale, Due in one year or less, Estimated Fair Value	1,335
Available-for-Sale, Due after one year through five years, Estimated Fair Value	1,228
Available-for-Sale, Due after five years through ten years, Estimated Fair Value	100,466
Available-for-Sale, Due after ten years, Estimated Fair Value	377,532
Available-for-Sale, Mortgage-backed securities, Estimated Fair Value	2,608,138
Available-for-Sale, Total, Estimated Fair Value	$ 3,088,699

Investment Securities - Additio

Investment Securities - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)Security	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)Security	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)
Schedule Of Available For Sale Securities [Line Items]
Impairment charges	$ 0	$ 0	$ 0	$ 0
Percentage of fair value of securities in investment portfolio reflect unrealized loss	15.00%		15.00%		35.00%
Number of securities in a loss position for more than twelve months | Security	11		11
Number of securities in a loss position for less than twelve months | Security	51		51
Allowance for credit losses related to available-for-sale securities	$ 0		$ 0
Collateral Pledged
Schedule Of Available For Sale Securities [Line Items]
Carrying value of securities pledged	$ 1,200,000,000		$ 1,200,000,000		$ 629,400,000

Investment Securities - Summa_2

Investment Securities - Summary of Gross Gains, and Gross Losses on Sales of Securities Available for Sale (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Investments Debt And Equity Securities [Abstract]
Gross realized gains	$ 79	$ 1,406	$ 5,359	$ 3,219
Gross realized losses		631		1,518
Realized gains, net	$ 79	$ 775	$ 5,359	$ 1,701

Investment Securities - Sched_2

Investment Securities - Schedule of Securities Classified as Available-for-Sale with Gross Unrealized Losses Aggregated by Category and Length of Time (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Schedule Of Available For Sale Securities [Line Items]
Losses less than 12 Months, Estimated Fair Value	$ 444,649	$ 742,044
Losses less than 12 Months, Gross Unrealized Losses	3,378	4,675
Losses more than 12 Months, Estimated Fair Value	13,902	75,209
Losses more than 12 Months, Gross Unrealized Losses	218	794
Obligations of U.S. Government Agencies
Schedule Of Available For Sale Securities [Line Items]
Losses less than 12 Months, Estimated Fair Value	102,193	33,053
Losses less than 12 Months, Gross Unrealized Losses	1,123	209
Losses more than 12 Months, Estimated Fair Value	12,114	13,703
Losses more than 12 Months, Gross Unrealized Losses	203	206
MBS
Schedule Of Available For Sale Securities [Line Items]
Losses less than 12 Months, Estimated Fair Value	276,079	708,991
Losses less than 12 Months, Gross Unrealized Losses	1,580	4,466
Losses more than 12 Months, Estimated Fair Value	1,788	61,506
Losses more than 12 Months, Gross Unrealized Losses	15	$ 588
Obligations of States and Municipal Subdivisions
Schedule Of Available For Sale Securities [Line Items]
Losses less than 12 Months, Estimated Fair Value	66,377
Losses less than 12 Months, Gross Unrealized Losses	$ 675

Loans Held for Sale, Loans an_3

Loans Held for Sale, Loans and Allowance for Credit Losses - Summary of Loans Held for Sale by Portfolio Segment at Lower of Amortized Cost or Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]
Loans held for sale	$ 54,100	$ 87,649
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Loans held for sale	38,229	34,767
Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Loans held for sale	707	49,894
Consumer
Accounts Notes And Loans Receivable [Line Items]
Loans held for sale	$ 15,164	$ 2,988

Loans Held for Sale, Loans an_4

Loans Held for Sale, Loans and Allowance for Credit Losses - Summary of Loans Held for Sale by Portfolio Segment at Lower of Amortized Cost or Fair Value (Parenthetical) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]
Accrued interest receivable	$ 48.5	$ 44.5
Loans Held for Sale
Accounts Notes And Loans Receivable [Line Items]
Accrued interest receivable	$ 0.1	$ 0.4

Loans Held for Sale, Loans an_5

Loans Held for Sale, Loans and Allowance for Credit Losses - Total Loans Outstanding by Portfolio Segment and Class of Financing Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	$ 13,465,556	$ 12,983,655	$ 13,716,079
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	7,769,122	7,438,658	7,340,631
Commercial and Industrial | General C&I
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	4,742,480	4,517,016
Commercial and Industrial | Energy Sector
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	1,391,176	1,419,957
Commercial and Industrial | Restaurant Industry
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	1,091,862	1,027,421
Commercial and Industrial | Healthcare
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	543,604	474,264
Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	3,112,877	2,887,272	2,901,296
Commercial Real Estate | Industrial, Retail, and Other
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	1,717,706	1,691,694
Commercial Real Estate | Multifamily
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	854,651	659,902
Commercial Real Estate | Office
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	540,520	535,676
Consumer
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	2,583,557	2,657,725	$ 2,723,222
Consumer | Residential
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	2,497,815	2,568,295
Consumer | Other
Accounts Notes And Loans Receivable [Line Items]
Total loan outstanding and financing receivable	$ 85,742	$ 89,430

Loans Held for Sale, Loans an_6

Loans Held for Sale, Loans and Allowance for Credit Losses - Total Loans Outstanding by Portfolio Segment and Class of Financing Receivable (Parenthetical) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]
Accrued interest receivable	$ 48.5	$ 44.5
Loans And Leases Receivable Gross Carrying Amount
Accounts Notes And Loans Receivable [Line Items]
Accrued interest receivable	$ 48.5	$ 44.5

Loans Held-for-Sale, Loans and

Loans Held-for-Sale, Loans and Allowance for Credit Losses - Summary of PPP Loans by Portfolio Segment and Class of Financing Receivable (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020USD ($)
Accounts Notes And Loans Receivable [Line Items]
As a % of total loans	7.80%
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Amortized Cost	$ 1,054,838
% of PPP Portfolio	100.00%
Commercial and Industrial | General C&I
Accounts Notes And Loans Receivable [Line Items]
Amortized Cost	$ 738,520
% of PPP Portfolio	70.00%
Commercial and Industrial | Energy Sector
Accounts Notes And Loans Receivable [Line Items]
Amortized Cost	$ 79,192
% of PPP Portfolio	7.50%
Commercial and Industrial | Restaurant Industry
Accounts Notes And Loans Receivable [Line Items]
Amortized Cost	$ 142,099
% of PPP Portfolio	13.50%
Commercial and Industrial | Healthcare
Accounts Notes And Loans Receivable [Line Items]
Amortized Cost	$ 95,027
% of PPP Portfolio	9.00%

Loans Held for Sale, Loans an_7

Loans Held for Sale, Loans and Allowance for Credit Losses - Additional Information (Details)	Oct. 16, 2020USD ($)	Jun. 30, 2020USD ($)	Jan. 01, 2020USD ($)	Sep. 30, 2020USD ($)TDR	Sep. 30, 2019USD ($)TDR	Sep. 30, 2020USD ($)TDR	Sep. 30, 2019USD ($)TDR	Dec. 31, 2019USD ($)
Accounts Notes And Loans Receivable [Line Items]
Description policy review						two times per year
Relationships amount						$ 5,000,000
Loans amount						5,000,000
Allowance for Credit Losses			$ 75,900,000	$ 34,400,000		274,800,000
Collateral loans impaired						$ 166,200,000
Number of TDRs | TDR				0	0	0	0
Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Foreclosed residential properties				$ 220,000		$ 220,000		$ 151,000
Residential Real Estate | Consumer Loans
Accounts Notes And Loans Receivable [Line Items]
Residential mortgage loans in process of foreclosure				2,300,000		2,300,000		$ 4,400,000
COVID-19
Accounts Notes And Loans Receivable [Line Items]
Loan modifications total		$ 0		3,700,000		3,700,000
COVID-19 | Payment Deferrals
Accounts Notes And Loans Receivable [Line Items]
Loan modifications declined amount		$ 1,400,000,000				376,100,000
COVID-19 | Payment Deferrals | Subsequent Event
Accounts Notes And Loans Receivable [Line Items]
Loan modifications declined amount	$ 181,000
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Charge-offs related loans modified into TDRs				$ 0	$ 27,700,000	19,300,000	$ 45,500,000
Customer Concentration | Accounts Receivable
Accounts Notes And Loans Receivable [Line Items]
Consumer purpose loan risk						1,000,000
Customer Concentration | Accounts Receivable | Criticized
Accounts Notes And Loans Receivable [Line Items]
Consumer purpose loan risk						1,000,000
Customer Concentration | Accounts Receivable | Minimum
Accounts Notes And Loans Receivable [Line Items]
Consumer purpose loan risk						2,500,000
Customer Concentration | Accounts Receivable | Minimum | Criticized
Accounts Notes And Loans Receivable [Line Items]
Consumer purpose loan risk						2,500,000
Customer Concentration | Accounts Receivable | Minimum | NSC
Accounts Notes And Loans Receivable [Line Items]
Consumer purpose loan risk						10,000,000
Customer Concentration | Accounts Receivable | Maximum
Accounts Notes And Loans Receivable [Line Items]
Consumer purpose loan risk						$ 10,000,000

Loans Held for Sale, Loans an_8

Loans Held for Sale, Loans and Allowance for Credit Losses - Summary of Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period	$ 370,901	$ 119,643	$ 115,345	$ 119,643	$ 94,378	$ 94,378
Provision for credit losses	34,405		43,764	274,849	83,901
Charge-offs	(21,830)		(31,650)	(88,380)	(51,568)
Recoveries	1,936		314	3,450	1,062
Balance at end of period	385,412		127,773	385,412	127,773	119,643
Allowance for credit losses, collectively evaluated for impairment	357,214		109,401	357,214	109,401
Allowance for credit losses, individually evaluated for impairment	28,198		18,372	28,198	18,372
Loans collectively evaluated	13,299,365		13,578,351	13,299,365	13,578,351
Loans individually evaluated	166,191		137,728	166,191	137,728
Loans ending balance	13,465,556		13,716,079	13,465,556	13,716,079	12,983,655
Cumulative Effect, Period of Adoption, Adjustment
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period		$ 75,850		$ 75,850
Balance at end of period						$ 75,850
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201613Member		us-gaap:AccountingStandardsUpdate201613Member		us-gaap:AccountingStandardsUpdate201613Member
Cumulative Effect, Period of Adoption, Adjusted Balance
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period		$ 195,493		$ 195,493
Balance at end of period						$ 195,493
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period	217,796	89,796	82,446	89,796	66,316	66,316
Provision for credit losses	1,562		36,660	160,570	70,611
Charge-offs	(18,604)		(29,632)	(83,406)	(48,093)
Recoveries	1,443		183	2,286	823
Balance at end of period	202,197		89,657	202,197	89,657	89,796
Allowance for credit losses, collectively evaluated for impairment	177,035		74,341	177,035	74,341
Allowance for credit losses, individually evaluated for impairment	25,162		15,316	25,162	15,316
Loans collectively evaluated	7,630,702		7,231,114	7,630,702	7,231,114
Loans individually evaluated	138,420		109,517	138,420	109,517
Loans ending balance	7,769,122		7,340,631	7,769,122	7,340,631	7,438,658
Commercial and Industrial | Cumulative Effect, Period of Adoption, Adjustment
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period		32,951		$ 32,951
Balance at end of period						32,951
Accounting Standards Update [Extensible List]				us-gaap:AccountingStandardsUpdate201613Member
Commercial and Industrial | Cumulative Effect, Period of Adoption, Adjusted Balance
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period		122,747		$ 122,747
Balance at end of period						122,747
Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period	112,480	15,319	13,417	15,319	10,452	10,452
Provision for credit losses	33,262		4,590	110,420	7,893
Charge-offs	(2,978)		(542)	(3,784)	(880)
Recoveries	244		42	454	42
Balance at end of period	143,008		17,507	143,008	17,507	15,319
Allowance for credit losses, collectively evaluated for impairment	139,972		14,695	139,972	14,695
Allowance for credit losses, individually evaluated for impairment	3,036		2,812	3,036	2,812
Loans collectively evaluated	3,087,553		2,878,461	3,087,553	2,878,461
Loans individually evaluated	25,324		22,835	25,324	22,835
Loans ending balance	3,112,877		2,901,296	3,112,877	2,901,296	2,887,272
Commercial Real Estate | Cumulative Effect, Period of Adoption, Adjustment
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period		20,599		$ 20,599
Balance at end of period						20,599
Accounting Standards Update [Extensible List]				us-gaap:AccountingStandardsUpdate201613Member
Commercial Real Estate | Cumulative Effect, Period of Adoption, Adjusted Balance
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period		35,918		$ 35,918
Balance at end of period						35,918
Consumer
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period	40,625	14,528	14,464	14,528	13,703	13,703
Provision for credit losses	(419)		1,256	3,859	2,702
Charge-offs	(248)		(555)	(1,190)	(1,323)
Recoveries	249		79	710	162
Balance at end of period	40,207		15,244	40,207	15,244	14,528
Allowance for credit losses, collectively evaluated for impairment	40,207		15,061	40,207	15,061
Allowance for credit losses, individually evaluated for impairment			183		183
Loans collectively evaluated	2,581,110		2,720,110	2,581,110	2,720,110
Loans individually evaluated	2,447		3,112	2,447	3,112
Loans ending balance	2,583,557		2,723,222	2,583,557	2,723,222	2,657,725
Consumer | Cumulative Effect, Period of Adoption, Adjustment
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period		22,300		$ 22,300
Balance at end of period						22,300
Accounting Standards Update [Extensible List]				us-gaap:AccountingStandardsUpdate201613Member
Consumer | Cumulative Effect, Period of Adoption, Adjusted Balance
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period		36,828		$ 36,828
Balance at end of period						36,828
Small Business Portfolio Segment
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period			5,018		3,907	3,907
Provision for credit losses			1,258		2,695
Charge-offs			(921)		(1,272)
Recoveries			10		35
Balance at end of period			5,365		5,365
Allowance for credit losses, collectively evaluated for impairment			5,304		5,304
Allowance for credit losses, individually evaluated for impairment			61		61
Loans collectively evaluated			748,666		748,666
Loans individually evaluated			2,264		2,264
Loans ending balance			$ 750,930		$ 750,930
Reserve for Unfunded Commitments
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period	3,827	1,699		1,699
Provision for credit losses	(1,432)			364
Balance at end of period	2,395			2,395		1,699
Reserve for Unfunded Commitments | Cumulative Effect, Period of Adoption, Adjustment
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period		332		$ 332
Balance at end of period						332
Accounting Standards Update [Extensible List]				us-gaap:AccountingStandardsUpdate201613Member
Reserve for Unfunded Commitments | Cumulative Effect, Period of Adoption, Adjusted Balance
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period		2,031		$ 2,031
Balance at end of period						2,031
After Reserve For Unfunded Commitments
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period	374,728	121,342		121,342
Provision for credit losses	32,973			275,213
Charge-offs	(21,830)			(88,380)
Recoveries	1,936			3,450
Balance at end of period	$ 387,807			387,807		121,342
After Reserve For Unfunded Commitments | Cumulative Effect, Period of Adoption, Adjustment
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period		76,182		$ 76,182
Balance at end of period						76,182
Accounting Standards Update [Extensible List]				us-gaap:AccountingStandardsUpdate201613Member
After Reserve For Unfunded Commitments | Cumulative Effect, Period of Adoption, Adjusted Balance
Accounts Notes And Loans Receivable [Line Items]
Balance at beginning of period		$ 197,524		$ 197,524
Balance at end of period						$ 197,524

Loans Held for Sale, Loans an_9

Loans Held for Sale, Loans and Allowance for Credit Losses - Summary of Allowance for Credit Losses (Parenthetical) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Receivables [Abstract]
Accrued interest receivable	$ 48.5	$ 44.5

Loans Held for Sale, Loans a_10

Loans Held for Sale, Loans and Allowance for Credit Losses - Summary of Credit Quality Indicator And by Origination Year (Details) $ in Thousands	Sep. 30, 2020USD ($)
Financing Receivable Recorded Investment [Line Items]
2020	$ 2,142,693
2019	1,682,524
2018	2,461,857
2017	1,630,447
2016	969,905
2015 and Prior	1,663,234
Revolving Loans	2,898,910
Revolving Credits Converted to Term Loans	15,986
Total	13,465,556
Commercial Portfolio Segment
Financing Receivable Recorded Investment [Line Items]
2020	1,498,082
2019	702,272
2018	1,118,435
2017	693,978
2016	429,984
2015 and Prior	740,156
Revolving Loans	2,571,433
Revolving Credits Converted to Term Loans	14,782
Total	7,769,122
Commercial Portfolio Segment | Pass
Financing Receivable Recorded Investment [Line Items]
2020	1,494,709
2019	662,526
2018	934,739
2017	603,527
2016	379,457
2015 and Prior	594,818
Revolving Loans	2,194,250
Revolving Credits Converted to Term Loans	13,892
Total	6,877,918
Commercial Portfolio Segment | Special mention
Financing Receivable Recorded Investment [Line Items]
2020	137
2019	27,273
2018	39,861
2017	39,407
2016	1,061
2015 and Prior	29,014
Revolving Loans	179,300
Revolving Credits Converted to Term Loans	140
Total	316,193
Commercial Portfolio Segment | Substandard
Financing Receivable Recorded Investment [Line Items]
2020	3,236
2019	12,473
2018	131,694
2017	50,298
2016	45,845
2015 and Prior	110,501
Revolving Loans	195,504
Revolving Credits Converted to Term Loans	750
Total	550,301
Commercial Portfolio Segment | Doubtful
Financing Receivable Recorded Investment [Line Items]
2018	12,141
2017	746
2016	3,621
2015 and Prior	5,823
Revolving Loans	2,379
Total	24,710
Commercial Real Estate
Financing Receivable Recorded Investment [Line Items]
2020	301,844
2019	530,093
2018	790,189
2017	643,737
2016	261,949
2015 and Prior	485,159
Revolving Loans	99,664
Revolving Credits Converted to Term Loans	242
Total	3,112,877
Commercial Real Estate | Pass
Financing Receivable Recorded Investment [Line Items]
2020	301,332
2019	520,504
2018	756,079
2017	579,773
2016	234,644
2015 and Prior	451,972
Revolving Loans	99,197
Revolving Credits Converted to Term Loans	242
Total	2,943,743
Commercial Real Estate | Special mention
Financing Receivable Recorded Investment [Line Items]
2020	512
2019	9,379
2018	13,778
2017	44,420
2016	1,408
2015 and Prior	24,644
Revolving Loans	193
Total	94,334
Commercial Real Estate | Substandard
Financing Receivable Recorded Investment [Line Items]
2019	210
2018	17,303
2017	19,544
2016	25,897
2015 and Prior	8,543
Revolving Loans	274
Total	71,771
Commercial Real Estate | Doubtful
Financing Receivable Recorded Investment [Line Items]
2018	3,029
Total	3,029
Consumer
Financing Receivable Recorded Investment [Line Items]
2020	342,767
2019	450,159
2018	553,233
2017	292,732
2016	277,972
2015 and Prior	437,919
Revolving Loans	227,813
Revolving Credits Converted to Term Loans	962
Total	2,583,557
Consumer | Current
Financing Receivable Recorded Investment [Line Items]
2020	342,767
2019	448,653
2018	541,114
2017	291,380
2016	274,699
2015 and Prior	430,059
Revolving Loans	227,054
Revolving Credits Converted to Term Loans	962
Total	2,556,688
Consumer | 30-59 days past due
Financing Receivable Recorded Investment [Line Items]
2019	776
2018	3,710
2017	157
2016	1,506
2015 and Prior	1,658
Revolving Loans	740
Total	8,547
Consumer | 60-89 days past due
Financing Receivable Recorded Investment [Line Items]
2019	379
2018	1,347
2017	181
2016	1,226
2015 and Prior	1,588
Total	4,721
Consumer | 90+ days past due
Financing Receivable Recorded Investment [Line Items]
2019	351
2018	7,062
2017	1,014
2016	541
2015 and Prior	4,614
Revolving Loans	19
Total	$ 13,601

Loans Held for Sale, Loans a_11

Loans Held for Sale, Loans and Allowance for Credit Losses - Summary of Credit Quality Indicator And by Origination Year (Parenthetical) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Receivables [Abstract]
Accrued interest receivable	$ 48.5	$ 44.5

Loans Held for Sale, Loans a_12

Loans Held for Sale, Loans and Allowance for Credit Losses - Summary of Aging of Past Due Loans By Segment and Class of Financing Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	$ 117,276	$ 92,671
Current	13,348,280	12,890,984
Total	13,465,556	12,983,655
90+ Days Past Due and Accruing	7,260	1,120
30-59 days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	20,194	37,625
60-89 days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	10,230	8,713
90+ days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	86,852	46,333
Commercial and Industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	70,215	62,814
Current	7,698,907	7,375,844
Total	7,769,122	7,438,658
90+ Days Past Due and Accruing	348	193
Commercial and Industrial | 30-59 days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	10,428	24,859
Commercial and Industrial | 60-89 days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	4,754	2,442
Commercial and Industrial | 90+ days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	55,033	35,513
Commercial and Industrial | General C&I
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	19,027	39,443
Current	4,723,453	4,477,573
Total	4,742,480	4,517,016
90+ Days Past Due and Accruing	145	85
Commercial and Industrial | General C&I | 30-59 days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	7,038	23,143
Commercial and Industrial | General C&I | 60-89 days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	4,663	1,117
Commercial and Industrial | General C&I | 90+ days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	7,326	15,183
Commercial and Industrial | Energy Sector
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	28,919	8,166
Current	1,362,257	1,411,791
Total	1,391,176	1,419,957
Commercial and Industrial | Energy Sector | 30-59 days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	2,864
Commercial and Industrial | Energy Sector | 90+ days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	26,055	8,166
Commercial and Industrial | Restaurant Industry
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	21,315	10,524
Current	1,070,547	1,016,897
Total	1,091,862	1,027,421
90+ Days Past Due and Accruing	203	108
Commercial and Industrial | Restaurant Industry | 30-59 days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	301	1,219
Commercial and Industrial | Restaurant Industry | 60-89 days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	1	1,284
Commercial and Industrial | Restaurant Industry | 90+ days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	21,013	8,021
Commercial and Industrial | Healthcare
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	954	4,681
Current	542,650	469,583
Total	543,604	474,264
Commercial and Industrial | Healthcare | 30-59 days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	225	497
Commercial and Industrial | Healthcare | 60-89 days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	90	41
Commercial and Industrial | Healthcare | 90+ days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	639	4,143
Commercial Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	20,192	7,214
Current	3,092,685	2,880,058
Total	3,112,877	2,887,272
90+ Days Past Due and Accruing	148
Commercial Real Estate | Industrial, retail, and other
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	3,789	5,742
Current	1,713,917	1,685,952
Total	1,717,706	1,691,694
90+ Days Past Due and Accruing	148
Commercial Real Estate | Multifamily
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	88
Current	854,563	659,902
Total	854,651	659,902
Commercial Real Estate | Office
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	16,315	1,472
Current	524,205	534,204
Total	540,520	535,676
Commercial Real Estate | 30-59 days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	1,219	3,607
Commercial Real Estate | 30-59 days past due | Industrial, retail, and other
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	1,083	3,354
Commercial Real Estate | 30-59 days past due | Multifamily
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	88
Commercial Real Estate | 30-59 days past due | Office
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	48	253
Commercial Real Estate | 60-89 days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	755	133
Commercial Real Estate | 60-89 days past due | Industrial, retail, and other
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	755	133
Commercial Real Estate | 90+ days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	18,218	3,474
Commercial Real Estate | 90+ days past due | Industrial, retail, and other
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	1,951	2,255
Commercial Real Estate | 90+ days past due | Office
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	16,267	1,219
Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	26,869	22,643
Current	2,556,688	2,635,082
Total	2,583,557	2,657,725
90+ Days Past Due and Accruing	6,764	927
Consumer | Residential Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	26,021	22,360
Current	2,471,794	2,545,935
Total	2,497,815	2,568,295
90+ Days Past Due and Accruing	6,414	887
Consumer | Other
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	848	283
Current	84,894	89,147
Total	85,742	89,430
90+ Days Past Due and Accruing	350	40
Consumer | 30-59 days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	8,547	9,159
Consumer | 30-59 days past due | Residential Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	8,085	8,967
Consumer | 30-59 days past due | Other
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	462	192
Consumer | 60-89 days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	4,721	6,138
Consumer | 60-89 days past due | Residential Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	4,687	6,101
Consumer | 60-89 days past due | Other
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	34	37
Consumer | 90+ days past due
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	13,601	7,346
Consumer | 90+ days past due | Residential Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	13,249	7,292
Consumer | 90+ days past due | Other
Financing Receivable Recorded Investment Past Due [Line Items]
Age Analysis of Past-Due Loans	$ 352	$ 54

Loans Held for Sale, Loans a_13

Loans Held for Sale, Loans and Allowance for Credit Losses - Summary of Aging of Past Due Loans By Segment and Class of Financing Receivable (Parenthetical) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Receivables [Abstract]
Accrued interest receivable	$ 48.5	$ 44.5

Loans Held for Sale, Loans a_14

Loans Held for Sale, Loans and Allowance for Credit Losses - Summary of Nonaccruing Loans by Portfolio Segment and Class of Financing Receivable (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual Loans - Amortized Cost, Beginning of the Period		$ 156,778
Nonaccrual Loans - Amortized Cost, End of the Period	$ 189,097	189,097
Nonaccrual Loans - Amortized Cost, No Allowance Recorded	34,635	34,635
90+ Days Past Due and Accruing	7,260	7,260	$ 1,120
Interest Income Recognized	77	288
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual Loans - Amortized Cost, Beginning of the Period		134,473
Nonaccrual Loans - Amortized Cost, End of the Period	145,991	145,991
Nonaccrual Loans - Amortized Cost, No Allowance Recorded	23,726	23,726
90+ Days Past Due and Accruing	348	348	193
Interest Income Recognized	18	83
Commercial and Industrial | General C&I
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual Loans - Amortized Cost, Beginning of the Period		66,589
Nonaccrual Loans - Amortized Cost, End of the Period	36,774	36,774
Nonaccrual Loans - Amortized Cost, No Allowance Recorded	3,671	3,671
90+ Days Past Due and Accruing	145	145	85
Interest Income Recognized	4	22
Commercial and Industrial | Energy Sector
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual Loans - Amortized Cost, Beginning of the Period		9,568
Nonaccrual Loans - Amortized Cost, End of the Period	48,754	48,754
Nonaccrual Loans - Amortized Cost, No Allowance Recorded	2,864	2,864
Interest Income Recognized	1	10
Commercial and Industrial | Restaurant Industry
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual Loans - Amortized Cost, Beginning of the Period		53,483
Nonaccrual Loans - Amortized Cost, End of the Period	59,448	59,448
Nonaccrual Loans - Amortized Cost, No Allowance Recorded	17,191	17,191
90+ Days Past Due and Accruing	203	203	108
Interest Income Recognized	13	51
Commercial and Industrial | Healthcare
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual Loans - Amortized Cost, Beginning of the Period		4,833
Nonaccrual Loans - Amortized Cost, End of the Period	1,015	1,015
Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual Loans - Amortized Cost, Beginning of the Period		7,180
Nonaccrual Loans - Amortized Cost, End of the Period	26,742	26,742
Nonaccrual Loans - Amortized Cost, No Allowance Recorded	8,463	8,463
90+ Days Past Due and Accruing	148	148
Interest Income Recognized	24	83
Commercial Real Estate | Industrial, Retail, and Other
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual Loans - Amortized Cost, Beginning of the Period		5,935
Nonaccrual Loans - Amortized Cost, End of the Period	10,475	10,475
Nonaccrual Loans - Amortized Cost, No Allowance Recorded	8,463	8,463
90+ Days Past Due and Accruing	148	148
Interest Income Recognized	24	83
Commercial Real Estate | Office
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual Loans - Amortized Cost, Beginning of the Period		1,245
Nonaccrual Loans - Amortized Cost, End of the Period	16,267	16,267
Consumer
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual Loans - Amortized Cost, Beginning of the Period		15,125
Nonaccrual Loans - Amortized Cost, End of the Period	16,364	16,364
Nonaccrual Loans - Amortized Cost, No Allowance Recorded	2,446	2,446
90+ Days Past Due and Accruing	6,764	6,764	927
Interest Income Recognized	35	122
Consumer | Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual Loans - Amortized Cost, Beginning of the Period		15,101
Nonaccrual Loans - Amortized Cost, End of the Period	16,357	16,357
Nonaccrual Loans - Amortized Cost, No Allowance Recorded	2,446	2,446
90+ Days Past Due and Accruing	6,414	6,414	$ 887
Interest Income Recognized	30	113
Consumer | Other
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual Loans - Amortized Cost, Beginning of the Period		24
Nonaccrual Loans - Amortized Cost, End of the Period	7	7
90+ Days Past Due and Accruing	350	350
Interest Income Recognized	$ 5	$ 9

Loans Held for Sale, Loans a_15

Loans Held for Sale, Loans and Allowance for Credit Losses - Summary of Nonaccruing Loans by Portfolio Segment and Class of Financing Receivable (Parenthetical) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]
ACI loans reclassed to nonaccrual loans		$ 189,097	$ 156,778
Accrued interest receivable		$ 48,500	44,500
Cumulative Effect, Period of Adoption, Adjustment
Accounts Notes And Loans Receivable [Line Items]
ACI loans reclassed to nonaccrual loans			$ 43,000
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201613Member
Non Accruing Loans
Accounts Notes And Loans Receivable [Line Items]
Accrued interest receivable		$ 200

Loans Held for Sale, Loans a_16

Loans Held for Sale, Loans and Allowance for Credit Losses - Summary of Loan that were Modified Into TDRs (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019USD ($)TDR	Sep. 30, 2020USD ($)TDR	Sep. 30, 2019USD ($)TDR
Financing Receivable Modifications [Line Items]
Number of TDRs | TDR	3	7	8
Amortized Cost | $	$ 11,902	$ 45,628	$ 27,926
Commercial and Industrial | General C&I
Financing Receivable Modifications [Line Items]
Number of TDRs | TDR	1	4	3
Amortized Cost | $	$ 11,769	$ 16,836	$ 19,893
Commercial and Industrial | Energy Sector
Financing Receivable Modifications [Line Items]
Number of TDRs | TDR	1	1	3
Amortized Cost | $		$ 8,013	$ 6,445
Commercial and Industrial | Restaurant Industry
Financing Receivable Modifications [Line Items]
Number of TDRs | TDR	1	2	1
Amortized Cost | $	$ 133	$ 20,779	$ 133
Industrial, Retail, and Other
Financing Receivable Modifications [Line Items]
Number of TDRs | TDR			1
Amortized Cost | $			$ 1,455

Loans Held for Sale, Loans a_17

Loans Held for Sale, Loans and Allowance for Credit Losses - Summary of Loan that were Modified Into TDRs (Parenthetical) (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable Modifications [Line Items]
Net accrued interest receivable	$ 0
Accrued interest receivable	48,500,000	$ 44,500,000
Maximum
Financing Receivable Modifications [Line Items]
Accrued interest receivable	$ 0

Loans Held for Sale, Loans a_18

Loans Held for Sale, Loans and Allowance for Credit Losses - Summary of Types of Loan Modifications that were Modified into TDRs (Details) - TDR	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Financing Receivable Modifications [Line Items]
Number of Loans Modified	3	7	8
Rate Concession
Financing Receivable Modifications [Line Items]
Number of Loans Modified		1
Modified Terms and/or Other Concessions
Financing Receivable Modifications [Line Items]
Number of Loans Modified	3	6	8
Commercial and Industrial | General C&I
Financing Receivable Modifications [Line Items]
Number of Loans Modified	1	4	3
Commercial and Industrial | General C&I | Modified Terms and/or Other Concessions
Financing Receivable Modifications [Line Items]
Number of Loans Modified	1	4	3
Commercial and Industrial | Energy Sector
Financing Receivable Modifications [Line Items]
Number of Loans Modified	1	1	3
Commercial and Industrial | Energy Sector | Rate Concession
Financing Receivable Modifications [Line Items]
Number of Loans Modified		1
Commercial and Industrial | Energy Sector | Modified Terms and/or Other Concessions
Financing Receivable Modifications [Line Items]
Number of Loans Modified	1		3
Commercial and Industrial | Restaurant Industry
Financing Receivable Modifications [Line Items]
Number of Loans Modified	1	2	1
Commercial and Industrial | Restaurant Industry | Modified Terms and/or Other Concessions
Financing Receivable Modifications [Line Items]
Number of Loans Modified	1	2	1
Industrial, Retail, and Other
Financing Receivable Modifications [Line Items]
Number of Loans Modified			1
Industrial, Retail, and Other | Modified Terms and/or Other Concessions
Financing Receivable Modifications [Line Items]
Number of Loans Modified			1

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Summary of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Goodwill And Other Intangible Assets [Line Items]
Goodwill	$ 43,061	$ 485,336
Other intangible assets, net	88,944	105,613
Total goodwill and intangible assets, net	132,005	590,949
Core Deposit
Goodwill And Other Intangible Assets [Line Items]
Other intangible assets, net	76,331	90,788
Customer Lists
Goodwill And Other Intangible Assets [Line Items]
Other intangible assets, net	10,242	11,993
Noncompete Agreements
Goodwill And Other Intangible Assets [Line Items]
Other intangible assets, net	1,070	1,473
Trademarks
Goodwill And Other Intangible Assets [Line Items]
Other intangible assets, net	$ 1,301	$ 1,359

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Summary of Goodwill and Other Intangible Assets (Parenthetical) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Core Deposit
Goodwill And Other Intangible Assets [Line Items]
Accumulated amortization of intangible assets	$ 75,291	$ 60,836
Customer Lists
Goodwill And Other Intangible Assets [Line Items]
Accumulated amortization of intangible assets	23,609	21,908
Noncompete Agreements
Goodwill And Other Intangible Assets [Line Items]
Accumulated amortization of intangible assets	286	137
Trademarks
Goodwill And Other Intangible Assets [Line Items]
Accumulated amortization of intangible assets	$ 133	$ 75

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Goodwill And Other Intangible Assets [Line Items]
Interim goodwill impairment	$ 443,700	$ 443,695
Goodwill		$ 43,061	$ 485,336
State Bank Acquisition
Goodwill And Other Intangible Assets [Line Items]
Increased in goodwill related to acquisition	1,100
Wealth & Pension Services Group, Inc.
Goodwill And Other Intangible Assets [Line Items]
Increased in goodwill related to acquisition	$ 300

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets - Summary of Changes to Carrying Amount of Goodwill by Segment (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2020	Sep. 30, 2020
Goodwill And Other Intangible Assets [Line Items]
Balance as of December 31, 2019	$ 485,336	$ 485,336
Impairment	(443,700)	(443,695)
Balance as of September 30, 2020		43,061
Wealth & Pension Acquisition
Goodwill And Other Intangible Assets [Line Items]
Acquisition and other goodwill		304
Other
Goodwill And Other Intangible Assets [Line Items]
Acquisition and other goodwill		1,116
Banking
Goodwill And Other Intangible Assets [Line Items]
Balance as of December 31, 2019	442,579	442,579
Impairment	(443,700)	(443,695)
Banking | Other
Goodwill And Other Intangible Assets [Line Items]
Acquisition and other goodwill		1,116
Financial Services
Goodwill And Other Intangible Assets [Line Items]
Balance as of December 31, 2019	$ 42,757	42,757
Balance as of September 30, 2020		43,061
Financial Services | Wealth & Pension Acquisition
Goodwill And Other Intangible Assets [Line Items]
Acquisition and other goodwill		$ 304

Derivatives - Schedule of Notio

Derivatives - Schedule of Notional Amounts and Estimated Fair Values (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Feb. 28, 2019
Derivatives Fair Value [Line Items]
Notional Amount	$ 2,588,962	$ 6,339,935
Fair Value, Other Assets	66,546	257,137
Fair Value, Other Liabilities	17,233	11,211
Cash Flow Hedges
Derivatives Fair Value [Line Items]
Notional Amount			$ 4,000,000
Derivatives Designated as Hedging Instruments | Cash Flow Hedges
Derivatives Fair Value [Line Items]
Notional Amount	350,000	4,350,000
Fair Value, Other Assets	25,558	239,213
Fair Value, Other Liabilities		643
Derivatives Designated as Hedging Instruments | Cash Flow Hedges | Commercial Loans | Interest Rate Swaps
Derivatives Fair Value [Line Items]
Notional Amount	350,000	350,000
Fair Value, Other Assets	25,558
Fair Value, Other Liabilities		643
Derivatives Designated as Hedging Instruments | Cash Flow Hedges | Commercial Loans | Interest Rate Collars
Derivatives Fair Value [Line Items]
Notional Amount		4,000,000
Fair Value, Other Assets		239,213
Derivatives Not Designated as Hedging Instruments
Derivatives Fair Value [Line Items]
Notional Amount	2,238,962	1,989,935
Fair Value, Other Assets	40,988	17,924
Fair Value, Other Liabilities	17,233	10,568
Derivatives Not Designated as Hedging Instruments | Mortgage Loan Held for Sale Interest Rate Lock Commitments
Derivatives Fair Value [Line Items]
Notional Amount	36,970	4,138
Fair Value, Other Assets	566	22
Derivatives Not Designated as Hedging Instruments | Mortgage Loan Held for Sale Floating Commitments
Derivatives Fair Value [Line Items]
Notional Amount	8,942	1,523
Derivatives Not Designated as Hedging Instruments | Foreign Exchange Contracts
Derivatives Fair Value [Line Items]
Notional Amount	147,384	74,322
Fair Value, Other Assets	1,388	379
Fair Value, Other Liabilities	1,295	558
Derivatives Not Designated as Hedging Instruments | Commercial Loans | Interest Rate Swaps
Derivatives Fair Value [Line Items]
Notional Amount	1,246,712	1,008,805
Fair Value, Other Assets	24,935	8,386
Fair Value, Other Liabilities	1,976	899
Derivatives Not Designated as Hedging Instruments | Commercial Loans | Interest Rate Collars
Derivatives Fair Value [Line Items]
Notional Amount	68,887	75,555
Fair Value, Other Assets	468	257
Fair Value, Other Liabilities	468	257
Derivatives Not Designated as Hedging Instruments | Commercial Loans | Interest Rate Caps
Derivatives Fair Value [Line Items]
Notional Amount	145,842	167,185
Fair Value, Other Assets	3	18
Fair Value, Other Liabilities	3	18
Derivatives Not Designated as Hedging Instruments | Commercial Loans | Interest Rate Floors
Derivatives Fair Value [Line Items]
Notional Amount	567,496	654,298
Fair Value, Other Assets	13,491	8,836
Fair Value, Other Liabilities	13,491	8,836
Derivatives Not Designated as Hedging Instruments | Forward Contracts | Mortgage Loan Forward Sale Commitments
Derivatives Fair Value [Line Items]
Notional Amount	16,729	4,109
Fair Value, Other Assets	$ 137	$ 26

Derivatives - Additional Inform

Derivatives - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended		9 Months Ended
	Mar. 31, 2020	Feb. 28, 2019	Sep. 30, 2020	Dec. 31, 2019
Derivative [Line Items]
Obligation to return cash collateral provided by counterparty			$ 21,800	$ 240,900
Derivative, notional amount			2,588,962	6,339,935
Deferred net gains (loss) on derivatives			$ (76,300)
Cash Flow Hedges
Derivative [Line Items]
Derivative, notional amount		$ 4,000,000
Derivative contract term		5 years
Derivative contract remaining maturity	4 years
Amortization period of gain reflected in other comprehensive income net of deferred income taxes			amortize into interest income through February 29, 2024.
Realized gain on termination of cash flow hedges collar	$ 261,200
Maximum period for hedging transactions			5 years 4 months 24 days
LIBOR | Cash Flow Hedges
Derivative [Line Items]
Derivative fixed rate	0.5785%
Interest-bearing Deposits in Banks
Derivative [Line Items]
Cash or securities pledged as collateral			$ 13,300	$ 10,600

Derivatives - Schedule of Gain

Derivatives - Schedule of Gain (Loss) in Consolidated Statements of Operations Related to Derivative Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative Instruments Gain Loss [Line Items]
Noninterest income			$ (76,300)
Derivatives Designated as Hedging Instruments | Cash Flow Hedges | Commercial Loans | Interest Rate Swaps
Derivative Instruments Gain Loss [Line Items]
OCI	$ 275	$ 7,447	28,356	$ 28,419
Reclassified from AOCI to interest income	1,278	(1,182)	2,154	(4,199)
Derivatives Designated as Hedging Instruments | Cash Flow Hedges | Commercial Loans | Interest Rate Collars
Derivative Instruments Gain Loss [Line Items]
OCI		32,864	147,152	160,429
Reclassified from AOCI to interest income	18,432	2,667	43,358	2,704
Derivatives Not Designated as Hedging Instruments | Mortgage Loan Held for Sale Interest Rate Lock Commitments
Derivative Instruments Gain Loss [Line Items]
Noninterest income	18	23	544	50
Derivatives Not Designated as Hedging Instruments | Foreign Exchange Contracts
Derivative Instruments Gain Loss [Line Items]
Noninterest income	$ 590	$ 823	$ 2,142	$ 2,947

Derivative - Schedule of Intere

Derivative - Schedule of Interest Rate Swap Agreements (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Derivative [Line Items]
Notional Amount	$ 2,588,962	$ 6,339,935
1.5995% Interest Rate Swap
Derivative [Line Items]
Effective Date	Mar. 8, 2016
Maturity Date	Feb. 27, 2026
Notional Amount	$ 175,000
Fixed Rate	1.5995%
Variable Rate	1 Month LIBOR
1.5890% 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 ($)	Sep. 30, 2020	Dec. 31, 2019
Domestic
Time Deposits [Line Items]
Time deposits $250,000 and over	$ 482,000,000	$ 644,100,000
Foreign
Time Deposits [Line Items]
Time Deposits	$ 0	$ 0

Borrowed Funds - Additional Inf

Borrowed Funds - Additional Information (Details) - USD ($)	Mar. 29, 2020	Jun. 30, 2019	Mar. 31, 2015	Jun. 30, 2014	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Mar. 29, 2019
Borrowed Funds [Line Items]
Aggregate principle amount						$ 83,474,000
Unregistered multi tranche debt Transactions				$ 245,000,000
Unregistered debt transactions			$ 50,000,000
Debt conversion, description					The subordinated note due June 28, 2029 will convert to a floating rate on June 28, 2024. The subordinated note due March 11, 2025 converted to a floating rate on March 11, 2020. The Bank’s subordinated note will convert from a fixed rate to a floating rate on June 28, 2024.
Subordinated debt					$ 183,243,000		$ 182,712,000
Subordinate debt capital treatment achievement period					10 years
FHLB advances					$ 100,000,000		100,000,000
FHLB borrowing availability					2,600,000,000
Irrevocable letter of credit					776,000,000		391,000,000
Notes payable					$ 1,683,000		2,078,000
Holding Company Revolving Loan Facility | Revolving Credit Facility
Borrowed Funds [Line Items]
Debt instrument, maturity date	Mar. 29, 2021				Mar. 29, 2020
Line of credit facility, borrowing capacity								$ 100,000,000
Linscomb & Williams, Inc. | Wealth & Pension Services Group, Inc.
Borrowed Funds [Line Items]
Notes payable					$ 1,700,000
FRB
Borrowed Funds [Line Items]
Borrowings					$ 0		$ 0
Municipal Deposits
Borrowed Funds [Line Items]
Letter of credit expiration date					Jan. 22, 2021
Commercial Loans | FRB
Borrowed Funds [Line Items]
Collateralized borrowings from FRB					$ 1,600,000,000
Commercial and Residential Real Estate Loan
Borrowed Funds [Line Items]
FHLB advances collateral amount					$ 3,900,000,000
4.75% Fixed to Floating Rate Subordinated Notes Due 2029
Borrowed Funds [Line Items]
Aggregate principle amount		$ 85,000,000
Debt instrument, interest rate		4.75%			4.75%
4.875% Senior Notes, Due June 28, 2019
Borrowed Funds [Line Items]
Debt instrument, interest rate		4.875%
Debt instrument, maturity date					Jun. 28, 2019
Subordinated debt maturity period					4 years
5.375% Senior Notes, Due June 28, 2021
Borrowed Funds [Line Items]
Debt instrument, interest rate					5.375%		5.375%
Debt instrument, maturity date					Jun. 28, 2021		Jun. 28, 2021
Subordinated debt maturity period					7 years
7.250% Subordinated Notes, Due June 28, 2029, Callable in 2024
Borrowed Funds [Line Items]
Debt instrument, interest rate					7.25%		7.25%
Debt instrument, maturity date					Jun. 28, 2029		Jun. 28, 2029
Subordinated debt maturity period					15 years
Subordinated debt					$ 35,000,000
Call option period					10 years
6.250% Subordinated Notes, Due June 28, 2029, Callable in 2024
Borrowed Funds [Line Items]
Debt instrument, interest rate					6.25%		6.25%
Debt instrument, maturity date					Jun. 28, 2029		Jun. 28, 2029
Subordinated debt maturity period					15 years
Subordinated debt					$ 25,000,000
Call option period					10 years
4.750% Subordinated Notes, Due June 30, 2029, Callable in 2024
Borrowed Funds [Line Items]
Debt instrument, interest rate					4.75%		4.75%
Debt instrument, maturity date					Jun. 30, 2029		Jun. 30, 2029
Subordinated debt maturity period					10 years
Subordinated debt					$ 85,000,000
Call option period					5 years
3-month LIBOR Plus 4.663%, Subordinated Notes, Due March 11, 2025, Callable in 2020
Borrowed Funds [Line Items]
Debt instrument, interest rate					4.663%		4.663%
Debt instrument, maturity date					Mar. 11, 2025		Mar. 11, 2025
Subordinated debt					$ 40,000,000
Call option period					5 years
Expiration on November 30, 2020 | Municipal Deposits
Borrowed Funds [Line Items]
Irrevocable letter of credit					$ 770,000,000
Letter of credit expiration date					Nov. 30, 2020
Expiration on December 22, 2020 | Municipal Deposits
Borrowed Funds [Line Items]
Irrevocable letter of credit					$ 770,000,000
Letter of credit expiration date					Dec. 22, 2020
Letter of Credit | Municipal Deposits
Borrowed Funds [Line Items]
Borrowings					$ 6,000,000

Borrowed Funds - Summary of Deb

Borrowed Funds - Summary of Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Debt issue costs and unamortized premium	$ (1,779)	$ (2,350)
Total senior and subordinated debt	233,221	232,650
Cadence Bancorporation
Debt Instrument [Line Items]
Long-term debt, gross	210,000	210,000
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 | 3-month LIBOR Plus 4.663%, Subordinated Notes, Due March 11, 2025, Callable in 2020
Debt Instrument [Line Items]
Long-term debt, gross	40,000	40,000
Cadence Bancorporation | 4.750% Subordinated Notes, Due June 30, 2029, Callable in 2024
Debt Instrument [Line Items]
Long-term debt, gross	85,000	85,000
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)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 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
3-month LIBOR Plus 4.663%, Subordinated Notes, Due March 11, 2025, Callable in 2020
Debt Instrument [Line Items]
Debt instrument, interest rate	4.663%	4.663%
Debt instrument, maturity date	Mar. 11, 2025	Mar. 11, 2025
4.750% Subordinated Notes, Due June 30, 2029, Callable in 2024
Debt Instrument [Line Items]
Debt instrument, interest rate	4.75%	4.75%
Debt instrument, maturity date	Jun. 30, 2029	Jun. 30, 2029
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	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Junior subordinated debentures, gross	$ 50,619	$ 50,619
Purchase accounting adjustment, net of amortization	(13,077)	(13,174)
Total junior subordinated debentures	37,542	37,445
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	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
3 month LIBOR plus 2.85%, due 2033
Debt Instrument [Line Items]
Debt instrument, interest rate	2.85%	2.85%
Debt instrument maturity year	2033	2033
3 month LIBOR plus 2.95%, due 2033
Debt Instrument [Line Items]
Debt instrument, interest rate	2.95%	2.95%
Debt instrument maturity year	2033	2033
3 month LIBOR plus 1.75%, due 2037
Debt Instrument [Line Items]
Debt instrument, interest rate	1.75%	1.75%
Debt instrument maturity year	2037	2037

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	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Other noninterest income
Insurance revenue	$ 239	$ 216	$ 713	$ 658
Mortgage banking income	3,535	1,079	6,666	2,332
Income from bank owned life insurance policies	1,238	1,275	3,786	3,690
Other	(1,389)	1,730	(3,339)	4,710
Total other noninterest income	3,623	4,300	7,826	11,390
Other noninterest expenses
Data processing expense	3,024	3,641	9,460	9,670
Software amortization	4,432	3,406	12,015	9,925
Consulting and professional fees	3,320	2,621	9,035	6,749
Loan related expenses	953	(921)	2,448	1,729
FDIC insurance	2,528	527	8,903	4,149
Communications	1,119	1,425	3,278	3,880
Advertising and public relations	716	1,368	3,101	3,253
Legal expenses	681	500	1,672	1,303
Other	8,232	11,864	27,919	29,982
Total other noninterest expenses	$ 25,005	$ 24,431	$ 77,831	$ 70,640

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 9,486	$ 12,796	$ (30,401)	$ 44,605
Effective tax rate	16.10%	22.50%	7.00%	22.90%
Net deferred tax liability					$ 25,000
Net deferred tax asset	$ 71,300		$ 71,300

Earnings Per Common Share - Rec

Earnings Per Common Share - Reconciliation of Basic and Diluted Net Income (Loss) Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net income (loss) per consolidated statements of operations	$ 49,315	$ (56,114)	$ (399,311)	$ 43,986	$ 48,346	$ 58,201	$ (406,110)	$ 150,533
Net income allocated to participating securities	(431)			(137)				(525)
Net income (loss) allocated to common stock	$ 48,884			$ 43,849			$ (406,110)	$ 150,008
Weighted average common shares outstanding (Basic)	125,956,714			128,457,491			126,169,823	129,237,553
Weighted average dilutive restricted stock units and warrants	138,154			57,783				121,734
Weighted average common shares outstanding (Diluted)	126,094,868			128,515,274			126,169,823	129,359,287
Earnings (loss) per common share (Basic)	$ 0.39			$ 0.34			$ (3.22)	$ 1.16
Earnings (loss) per common share (Diluted)	$ 0.39			$ 0.34			$ (3.22)	$ 1.16

Earnings Per Common Share - Add

Earnings Per Common Share - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Stock Options and Restricted Stock Units
Earnings Per Share [Line Items]
Antidilutive stock options and restricted stock units	$ 2,309,357	$ 1,796,588	$ 2,285,632	$ 1,271,628

Regulatory Matters - Additional

Regulatory Matters - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Mar. 26, 2020	Dec. 31, 2019
Banking And Thrifts [Abstract]
Describes the potential impact of COVID-19	On March 27, 2020, the federal banking agencies issued an interim final rule (followed by a final rule issued on August 26, 2020) to delay the estimated impact on regulatory capital stemming from the adoption of CECL. The agencies granted this relief to allow institutions to focus on lending to customers in light of recent strains on the U.S economy due to COVID-19, while also maintaining the quality of regulatory capital. Under the final rule, 100% of the CECL Day 1 impact and 25% of subsequent provisions for credit losses (“Day 2” impacts) will be deferred over a two-year year period ending January 1, 2022, at which time this deferred amount will be phased in on a pro rata basis over a three-year period ending January 2025.
Cash on hand	$ 166.6
Reserve requirement with FRB			$ 246
Reserve requirement ratio with FRB		0.00%

Regulatory Matters - Schedule o

Regulatory Matters - Schedule of Actual Capital Amounts and Ratios (Details) $ in Thousands	Sep. 30, 2020USD ($)	Dec. 31, 2019USD ($)
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 leverage	$ 1,803,403	$ 1,784,664
Common equity tier 1 capital	1,803,403	1,784,664
Tier 1 risk-based capital	1,803,403	1,784,664
Total risk-based capital	2,198,061	2,120,571
Tier 1 leverage	726,475	690,213
Common equity tier 1 capital	673,791	697,089
Tier 1 risk-based capital	898,388	929,453
Total risk-based capital	1,197,851	1,239,270
Tier 1 risk-based capital	898,388	929,453
Total risk-based capital	$ 1,497,313	$ 1,549,088
Tier 1 leverage	0.099	0.103
Common equity tier 1 capital	0.120	0.115
Tier 1 risk-based capital	0.120	0.115
Total risk-based capital	0.147	0.137
Tier 1 leverage	0.040	0.040
Common equity tier 1 capital	4.50%	4.50%
Tier 1 risk-based capital	0.060	0.060
Total risk-based capital	0.080	0.080
Tier 1 risk-based capital	0.060	0.060
Total risk-based capital	0.100	0.100
Cadence Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 leverage	$ 1,876,954	$ 1,953,008
Common equity tier 1 capital	1,826,954	1,903,008
Tier 1 risk-based capital	1,876,954	1,953,008
Total risk-based capital	2,089,773	2,099,146
Tier 1 leverage	726,824	689,881
Common equity tier 1 capital	673,806	696,755
Tier 1 risk-based capital	898,408	929,007
Total risk-based capital	1,197,878	1,238,676
Tier 1 leverage	908,530	862,351
Common equity tier 1 capital	973,276	1,006,425
Tier 1 risk-based capital	1,197,878	1,238,676
Total risk-based capital	$ 1,497,347	$ 1,548,345
Tier 1 leverage	0.103	0.111
Common equity tier 1 capital	0.122	0.123
Tier 1 risk-based capital	0.125	0.126
Total risk-based capital	0.140	0.136
Tier 1 leverage	0.040	0.040
Common equity tier 1 capital	4.50%	4.50%
Tier 1 risk-based capital	0.060	0.060
Total risk-based capital	0.080	0.080
Tier 1 leverage	0.050	0.050
Common equity tier 1 capital	6.50%	6.50%
Tier 1 risk-based capital	0.080	0.080
Total risk-based capital	0.100	0.100

Commitments and Contingent Li_3

Commitments and Contingent Liabilities - Summary of Commitments and Contingent Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Commitments to Grant Loans
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Commitments to grant loans	$ 138,531	$ 292,199
Standby Letters of Credit
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Letters of credit	202,724	213,548
Performance Letters of Credit
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Performance letters of credit	21,036	27,985
Commercial Letters of Credit
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Letters of credit	21,971	15,587
Commitments to Extend Credit
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Commitments to extend credit	$ 4,283,138	$ 4,667,360

Commitments and Contingent Li_4

Commitments and Contingent Liabilities - Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Commitments And Contingencies Disclosure [Abstract]
Unfunded commitments - LLC Investments	$ 48.8	$ 44.9

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	Sep. 30, 2020	Dec. 31, 2019
Assets
Investment securities available-for-sale	$ 3,088,699	$ 2,368,592
Derivative assets	66,546	257,137
Liabilities
Derivative liabilities	17,233	11,211
Carrying Value
Assets
Investment securities available-for-sale	3,088,699	2,368,592
Derivative assets	66,546	257,137
Equity securities with readily determinable fair values not held for trading		1,862
Liabilities
Derivative liabilities	17,233	11,211
Level 1
Assets
Equity securities with readily determinable fair values not held for trading		1,862
Level 2
Assets
Investment securities available-for-sale	3,088,699	2,368,592
Derivative assets	66,546	257,137
Liabilities
Derivative liabilities	17,233	11,211
Fair Value, Measurements, Recurring | Carrying Value
Assets
Investment securities available-for-sale	3,088,699	2,368,592
Derivative assets	66,546	257,137
Equity securities with readily determinable fair values not held for trading		1,862
Other assets	34,521	26,882
Total assets	3,189,766	2,654,473
Liabilities
Derivative liabilities	17,233	11,211
Total recurring basis measured liabilities	17,233	11,211
Fair Value, Measurements, Recurring | Level 1
Assets
Equity securities with readily determinable fair values not held for trading		1,862
Total assets		1,862
Fair Value, Measurements, Recurring | Level 2
Assets
Investment securities available-for-sale	3,088,699	2,368,592
Derivative assets	66,546	257,137
Total assets	3,155,245	2,625,729
Liabilities
Derivative liabilities	17,233	11,211
Total recurring basis measured liabilities	17,233	11,211
Fair Value, Measurements, Recurring | Level 3
Assets
Other assets	34,521	26,882
Total assets	$ 34,521	$ 26,882

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) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net Profits Interests
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 3,733	$ 5,376	$ 4,330	$ 5,779
Net (losses) gains included in earnings	(164)	(73)	(761)	(188)
Distributions received		(143)		(431)
Ending Balance	3,569	5,160	3,569	5,160
Net (losses) unrealized gains included in earnings relating to assets held at the end of the period	(164)	(73)	(761)	(188)
Investments in Limited Partnerships
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	24,631	14,533	18,742	11,191
Net (losses) gains included in earnings	232	1,119	(1,099)	2,153
Reclassifications		110	1,727	(15)
Acquired in settlement of loans			4,257
Contributions paid	1,904	1,143	3,687	4,160
Distributions received	(187)	(44)	(734)	(628)
Ending Balance	26,580	16,861	26,580	16,861
Net (losses) unrealized gains included in earnings relating to assets held at the end of the period	232	1,119	(1,099)	2,153
SBA Servicing Assets
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	3,737	3,786	3,810
Acquired				6,213
Originations	402	455	962	969
Net (losses) gains included in earnings	233	(489)	(400)	(3,430)
Ending Balance	4,372	3,752	4,372	3,752
Net (losses) unrealized gains included in earnings relating to assets held at the end of the period	$ 233	$ (489)	$ (400)	$ (3,430)

Disclosure About Fair Values _5

Disclosure About Fair Values of Financial Instruments - Summary of Assets Recorded at Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Individually evaluated loans, net of allocated allowance for credit losses		$ 166,191		$ 137,728
Level 2
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Loans held for sale		54,100	$ 87,649
Fair Value, Nonrecurring
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Loans held for sale		54,100	87,649
Individually evaluated loans, net of allocated allowance for credit losses	[1]	137,992	101,561
Other real estate and repossessed assets		6,458
Other real estate			1,628
Total assets		198,550	190,838
Fair Value, Nonrecurring | Level 2
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Loans held for sale		54,100	87,649
Total assets		54,100	87,649
Fair Value, Nonrecurring | Level 3
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Individually evaluated loans, net of allocated allowance for credit losses	[1]	137,992	101,561
Other real estate and repossessed assets		6,458
Other real estate			1,628
Total assets		$ 144,450	$ 103,189
[1]	Prior to the adoption of CECL on January 1, 2020, these loans were known as Impaired loans, net of specific allowance.

Disclosure About Fair Values _6

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) - Level 3 $ in Thousands		9 Months Ended	12 Months Ended
		Sep. 30, 2020USD ($)	Dec. 31, 2019USD ($)
Minimum Guaranteed Proceeds Per Settlement Agreement
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable Inputs			Minimum guaranteed proceeds per Settlement Agreement
Range/Weighted Average	[1]		0.00%
Discount of Fair Value | Individually Evaluated, Net of Allocated Allowance for Credit Losses
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable Inputs	[2]	Discount to fair value	Discount to fair value
Discount of Fair Value | Individually Evaluated, Net of Allocated Allowance for Credit Losses | Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range/Weighted Average	[2]	0.00%	0.00%
Discount of Fair Value | Individually Evaluated, Net of Allocated Allowance for Credit Losses | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range/Weighted Average	[2]	78.00%	50.00%
Discount of Fair Value | Individually Evaluated, Net of Allocated Allowance for Credit Losses | Weighted Average
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value inputs, discount rate	[2],[3]	0.28
Discount of Fair Value | Individually Evaluated, Net of Allocated Allowance for Credit Losses | Fair Value, Nonrecurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Carrying Value	[2]	$ 137,992	$ 101,561
Discount of Fair Value | Other Real Estate and Repossessed Assets
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable Inputs		Discount to fair value
Discount of Fair Value | Other Real Estate and Repossessed Assets | Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range/Weighted Average		0.00%
Discount of Fair Value | Other Real Estate and Repossessed Assets | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range/Weighted Average		20.00%
Discount of Fair Value | Other Real Estate and Repossessed Assets | Weighted Average
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range/Weighted Average	[3]	10.00%
Discount of Fair Value | Other Real Estate and Repossessed Assets | Fair Value, Nonrecurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Carrying Value		$ 6,458
Discount of Fair Value | Other
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable Inputs			Discount to fair value
Discount of Fair Value | Other | Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range/Weighted Average			0.00%
Discount of Fair Value | Other | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range/Weighted Average			20.00%
Discount of Fair Value | Other | Fair Value, Nonrecurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Carrying Value			$ 1,628
Discounted Cash Flow
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable Inputs		Discount rate	Discount rate 5.8%
Range/Weighted Average	[1]		0.00%
Discounted Cash Flow | Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range/Weighted Average		3.75%
Discounted Cash Flow | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range/Weighted Average		3.91%
Discounted Cash Flow | Weighted Average
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value measurements, percentage of enterprise value	[3]	3.90%
Discounted Cash Flow | Measurement Input, Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value inputs, discount rate			0.058
Enterprise Value
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable Inputs			Exit and earnings multiples, discounted cash flows, and market comparables
Enterprise Value | Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value measurements, percentage of enterprise value	[1]		0.00%
Enterprise Value | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value measurements, percentage of enterprise value	[1]		46.00%
Enterprise Value | Comparables and Average Multiplier
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable Inputs		Comparables and average multiplier
Enterprise Value | Comparables and Average Multiplier | Weighted Average
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value measurements, percentage of enterprise value	[3]	4.71%
Enterprise Value | Discount Rates and Comparables
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable Inputs		Discount rates and comparables
Enterprise Value | Discount Rates and Comparables | Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value measurements, percentage of enterprise value		13.00%
Enterprise Value | Discount Rates and Comparables | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value measurements, percentage of enterprise value		15.00%
Enterprise Value | Discount Rates and Comparables | Weighted Average
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value measurements, percentage of enterprise value	[3]	14.00%
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/Weighted Average		10.00%	10.00%
Estimated Closing Costs | Weighted Average
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range/Weighted Average	[3]	10.00%
[1]	Represents difference of remaining balance to fair value.
[2]	Prior to the adoption of CECL on January 1, 2020, these loans were known as Impaired loans, net of specific allowance.
[3]	Weighted averages was calculated using the input attribute and the outstanding balance of the loan

Disclosure About Fair Values _7

Disclosure About Fair Values of Financial Instruments - Summary of Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financial Assets:
Interest-bearing deposits with banks	$ 1,067,258	$ 725,343
Federal funds sold	5,365	10,974
Investment securities available-for-sale	3,088,699	2,368,592
Derivative assets	66,546	257,137
Other assets	341,891	512,244
Financial Liabilities:
Advances from FHLB	100,000	100,000
Senior debt	49,978	49,938
Subordinated debt	183,243	182,712
Junior subordinated debentures	37,542	37,445
Notes payable	1,683	2,078
Derivative liabilities	17,233	11,211
Level 1
Financial Assets:
Cash and due from banks	174,549	252,447
Interest-bearing deposits with banks	1,067,258	725,343
Federal funds sold	5,365	10,974
Equity securities with readily determinable fair values not held for trading		1,862
Level 2
Financial Assets:
Investment securities available-for-sale	3,088,699	2,368,592
Loans held for sale	54,100	87,649
Derivative assets	66,546	257,137
Financial Liabilities:
Deposits	15,796,140	14,753,192
Advances from FHLB	100,000	100,000
Senior debt	50,675	51,202
Subordinated debt	188,153	189,386
Junior subordinated debentures	40,621	48,012
Notes payable	1,683	2,078
Derivative liabilities	17,233	11,211
Level 3
Financial Assets:
Net loans	13,184,043	12,755,360
Other assets	96,446	72,719
Carrying Value
Financial Assets:
Cash and due from banks	174,549	252,447
Interest-bearing deposits with banks	1,067,258	725,343
Federal funds sold	5,365	10,974
Investment securities available-for-sale	3,088,699	2,368,592
Loans held for sale	54,100	87,649
Equity securities with readily determinable fair values not held for trading		1,862
Net loans	13,080,144	12,864,012
Derivative assets	66,546	257,137
Other assets	96,446	72,719
Financial Liabilities:
Deposits	15,786,221	14,742,794
Advances from FHLB	100,000	100,000
Senior debt	49,978	49,938
Subordinated debt	183,243	182,712
Junior subordinated debentures	37,542	37,445
Notes payable	1,683	2,078
Derivative liabilities	17,233	11,211
Fair Value
Financial Assets:
Cash and due from banks	174,549	252,447
Interest-bearing deposits with banks	1,067,258	725,343
Federal funds sold	5,365	10,974
Investment securities available-for-sale	3,088,699	2,368,592
Loans held for sale	54,100	87,649
Equity securities with readily determinable fair values not held for trading		1,862
Net loans	13,184,043	12,755,360
Derivative assets	66,546	257,137
Other assets	96,446	72,719
Financial Liabilities:
Deposits	15,796,140	14,753,192
Advances from FHLB	100,000	100,000
Senior debt	50,675	51,202
Subordinated debt	188,153	189,386
Junior subordinated debentures	40,621	48,012
Notes payable	1,683	2,078
Derivative liabilities	$ 17,233	$ 11,211

Variable Interest Entities an_3

Variable Interest Entities and Other Investments - Additional Information (Details)	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2020USD ($)Investment	Jun. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)Investment	Sep. 30, 2019USD ($)	Dec. 31, 2018USD ($)Customer	Dec. 31, 2019USD ($)	Dec. 31, 2016Customer
Variable Interest Entities and Other Investments [Line Items]
Equity method investments	$ 6,964,000		$ 9,521,000	$ 6,964,000	$ 9,521,000	$ 8,714,000	$ 8,681,000
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entities and Other Investments [Line Items]
Cost method investments	26,600,000			26,600,000			18,700,000
Loss recognized from assets at fair value				1,100,000
Gain recognized from assets at fair value	200,000		$ 1,100,000		$ 2,200,000
Equity method investments	$ 7,000,000			$ 7,000,000			8,700,000
Number of investments fully impaired | Investment	1			1
Impairment charge		$ 1,900,000
Total marketable equity securities	$ 1,000			$ 1,000			1,900,000
Proceeds from sale of equity securities	1,300,000
Number of loan customers | Customer								2
Number of loan customers sold | Customer						1
Net profits interest	3,600,000			3,600,000			4,300,000
Variable Interest Entity, Not Primary Beneficiary | Rabbi Trust
Variable Interest Entities and Other Investments [Line Items]
Defined rabbi trust assets and benefit obligation	3,700,000			3,700,000			3,700,000
Variable Interest Entity, Not Primary Beneficiary | Limited Partner
Variable Interest Entities and Other Investments [Line Items]
Equity method investments	15,900,000			15,900,000			9,000,000
Variable Interest Entity, Not Primary Beneficiary | Other Assets
Variable Interest Entities and Other Investments [Line Items]
Investments in affordable Housing Project	$ 33,200,000			$ 33,200,000			$ 28,200,000

Variable Interest Entities an_4

Variable Interest Entities and Other Investments - Summary of Investment in Limited Partnerships (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Variable Interest Entities and Other Investments [Line Items]
Limited partnerships required to be accounted for under the equity method	$ 6,964	$ 8,681	$ 9,521	$ 8,714
Investments in Limited Partnerships
Variable Interest Entities and Other Investments [Line Items]
Affordable housing projects (amortized cost)	33,236	28,205
Limited partnerships accounted for under the fair value practical expedient of NAV	26,580	18,742
Limited partnerships without readily determinable fair values that do not qualify for the practical expedient of NAV accounted for under the cost method	6,964	8,681
Limited partnerships required to be accounted for under the equity method	15,886	8,951
Total investments in limited partnerships	$ 82,666	$ 64,579

Variable Interest Entities an_5

Variable Interest Entities and Other Investments - Summary of Carrying Amount of Equity Investments Measured Under Measurement Alternative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Variable Interest Entities And Other Investments [Abstract]
Carrying value, Beginning of Year	$ 8,681	$ 8,714
Reclassifications	(1,727)	15
Net income change	49
Distributions	(610)	(1,073)
Contributions	571	1,865
Carrying value, End of Period	$ 6,964	$ 9,521

Segment Reporting - Additional

Segment Reporting - Additional Information (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2020USD ($)	Sep. 30, 2020USD ($)Segment
Segment Reporting Information [Line Items]
Number of operating segments | Segment		3
Non-cash goodwill impairment charge	$ 443,700	$ 443,695
Banking
Segment Reporting Information [Line Items]
Non-cash goodwill impairment charge	$ 443,700	$ 443,695

Segment Reporting - Summary of

Segment Reporting - Summary of Operating Results of Segments (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net interest income (expense)	$ 154,042			$ 160,187			$ 462,225	$ 490,264
Provision for credit losses	32,973			43,764			275,213	83,901
Noninterest income	32,591			34,642			97,610	97,027
Noninterest expense	94,859			94,283			721,133	308,252
Income tax expense (benefit)	9,486			12,796			(30,401)	44,605
Net income (loss)	49,315	$ (56,114)	$ (399,311)	43,986	$ 48,346	$ 58,201	(406,110)	150,533
Total assets	18,404,195			17,855,946			18,404,195	17,855,946	$ 17,800,229
Banking
Segment Reporting Information [Line Items]
Net interest income (expense)	157,318			164,535			473,316	504,764
Provision for credit losses	32,973			43,764			275,213	83,901
Noninterest income	20,993			23,407			65,212	66,557
Noninterest expense	85,510			84,113			692,557	272,721
Income tax expense (benefit)	14,086			13,931			(30,513)	49,685
Net income (loss)	45,742			46,134			(398,729)	165,014
Total assets	18,305,151			17,743,054			18,305,151	17,743,054
Financial Services
Segment Reporting Information [Line Items]
Net interest income (expense)	(34)			(524)			(444)	(1,746)
Noninterest income	11,517			11,052			32,691	29,782
Noninterest expense	8,312			9,255			25,286	24,804
Income tax expense (benefit)	404			183			877	495
Net income (loss)	2,767			1,090			6,084	2,737
Total assets	94,407			106,248			94,407	106,248
Corporate
Segment Reporting Information [Line Items]
Net interest income (expense)	(3,242)			(3,824)			(10,647)	(12,754)
Noninterest income	81			183			(293)	688
Noninterest expense	1,037			915			3,290	10,727
Income tax expense (benefit)	(5,004)			(1,318)			(765)	(5,575)
Net income (loss)	806			(3,238)			(13,465)	(17,218)
Total assets	$ 4,637			$ 6,644			$ 4,637	$ 6,644

Equity-based Compensation - Add

Equity-based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	Jun. 01, 2018	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock granted				778,881	1,163,959
Number of unit expected to vest		1,694,269	1,264,228	1,694,269	1,264,228	1,229,863	273,354
Equity-based compensation expense		$ 1,700	$ 1,300	$ 4,000	$ 4,900
Remaining expense related to unvested restricted stock units		16,500		$ 16,500
Restricted Stock Units | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expense recognition period				3 months
Restricted Stock Units | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expense recognition period				45 months
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expense recognition period				16 months
Expense related to nonvested stock option grants		1,600		$ 1,600
Stock Options | Executive Officer
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation expense		$ 309	309	$ 928	$ 870
Number of options granted				0	1,602,848
Percentage of premium on common stock value, options granted				15.00%
Weighted-average exercise price				$ 20.43
Award vesting period				3 years
Option expiration period				7 years
Stock options vested				534,283
Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock shares available for grant		7,500,000		7,500,000
Shares of common stock remain available for future grants		3,500,000		3,500,000
Plan | Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock granted				778,881	1,163,959
Plan | Restricted Stock Units | Vest in First Quarter of 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of unit expected to vest		41,843		41,843
Plan | Restricted Stock Units | Vest in Third Quarter of 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of unit expected to vest		1,058		1,058
Plan | Restricted Stock Units | Vesting Quarterly
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of unit expected to vest		207,972		207,972
Plan | Restricted Stock Units | Cliff-Vest
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of unit expected to vest		21,653		21,653
Plan | Restricted Stock Units | Vest in First Quarter of 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of unit expected to vest		48,562		48,562
Plan | Restricted Stock Units | Vest in First Quarter of 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of unit expected to vest		175,292		175,292
Plan | Restricted Stock Units | Vest in Second Quarter of 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of unit expected to vest		5,252		5,252
Plan | Restricted Stock Units | Vest in Third Quarter of 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of unit expected to vest		7,426		7,426
Plan | Restricted Stock Units | Vest in First Quarter of 2024
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of unit expected to vest		760,174		760,174
Plan | Restricted Stock Units | Vest in Second Quarter of 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of unit expected to vest		3,000		3,000
Plan | Restricted Stock Units | Vest in Second Quarter of 2024
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of unit expected to vest		6,000		6,000
Plan | Restricted Stock Units | Half of Units Granted | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting rights, percentage				0.00%
Plan | Restricted Stock Units | Half of Units Granted | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting rights, percentage				200.00%
2018 Employee Stock Purchase Plan | Common Class A
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation expense		$ 72	$ 67	$ 116	$ 239
Percentage of discount on fair market value of common stock	15.00%
Common stock purchased in the open market				149,250	82,651
2018 Employee Stock Purchase Plan | Maximum | Common Class A
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Amount of common stock may be granted	500,000

Equity-based Compensation - Sum

Equity-based Compensation - Summary of Activity Related to Restricted Stock Unit Awards (Details) - Restricted Stock Units - $ / shares	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, Non-vested at beginning of period	1,229,863	273,354
Number of shares, Granted during the period	778,881	1,163,959
Number of shares, Vested during the period	(237,277)	(117,037)
Number of shares, Forfeited during the period	(77,198)	(56,048)
Number of shares, Non-vested at end of period	1,694,269	1,264,228
Weighted average fair value per unit at award date, Non-vested at beginning of period	$ 19.97	$ 26.49
Weighted average fair value per unit at award date, Granted during the period	7.78	18.53
Weighted average fair value per unit at award date, Vested during the period	19.61	21.05
Weighted average fair value per unit at award date, Forfeited during the period	18.71	20.54
Weighted average fair value per unit at award date, Non-vested at end of period	$ 14.47	$ 19.93

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Gain (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	$ 2,045,480	$ 2,113,543	$ 2,460,846	$ 2,426,072	$ 2,302,823	$ 1,438,274	$ 2,460,846	$ 1,438,274
Net change	(18,757)	(7,213)	165,971	37,271	95,273	60,773	140,001	193,317
Balance	2,071,472	2,045,480	2,113,543	2,475,944	2,426,072	2,302,823	2,071,472	2,475,944
Unrealized Gains (Losses) on Securities Available for Sale
Accumulated Other Comprehensive Income Loss [Line Items]
Balance			19,605			(24,279)	19,605	(24,279)
Net change							45,008	48,074
Balance	64,613			23,795			64,613	23,795
Unrealized Gains (Losses) on Derivative Instruments Designated as Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Balance			95,097			(18,305)	95,097	(18,305)
Net change							94,993	145,243
Balance	190,090			126,938			190,090	126,938
Unrealized Gains (Losses) on Defined Benefit Pension Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Balance						(328)		(328)
Balance				(328)				(328)
Accumulated OCI
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	273,460	280,673	114,702	113,134	17,861	(42,912)	114,702	(42,912)
Net change	(18,757)	(7,213)	165,971	37,271	95,273	60,773	140,001	193,317
Balance	$ 254,703	$ 273,460	$ 280,673	$ 150,405	$ 113,134	$ 17,861	$ 254,703	$ 150,405

Subsequent Events - Additional

Subsequent Events - Additional Information (Details) - $ / shares	Oct. 21, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Subsequent Event [Line Items]
Cash dividends declared per common share		$ 0.05	$ 0.05	$ 0.175	$ 0.175	$ 0.175	$ 0.175
Subsequent Event | Quarterly Dividend
Subsequent Event [Line Items]
Cash dividends declared per common share	$ 0.075
Subsequent Event | Annualized Dividend
Subsequent Event [Line Items]
Cash dividends declared per common share	$ 0.30