Texas Capital Bancshares (TCBI) 10-K 9 Feb 23 2022 FY Annual report Financial data

Cover Page

Cover Page - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Feb. 08, 2023	Jun. 30, 2022
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Document Transition Report	false
Entity File Number	001-34657
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	75-2679109
Entity Address, Address Line One	2000 McKinney Avenue
Entity Address, Address Line Two	Suite 700
Entity Address, City or Town	Dallas
Entity Address, State or Province	TX
Entity Address, Country	US
Entity Address, Postal Zip Code	75201
City Area Code	214
Local Phone Number	932-6600
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 2,610,657
Entity Common Stock, Shares Outstanding		48,228,345
Entity Registrant Name	TEXAS CAPITAL BANCSHARES INC/TX
Entity Central Index Key	0001077428
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false
Common Stock
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	TCBI
Security Exchange Name	NASDAQ
Series B Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	5.75% Non-Cumulative Perpetual Preferred Stock Series B, par value $0.01 per share
Trading Symbol	TCBIO
Security Exchange Name	NASDAQ

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2022
Audit Information [Abstract]
Auditor Name	Ernst & Young LLP
Auditor Location	Dallas, TX
Auditor Firm ID	42

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2022
Related Party Transactions [Abstract]
Related Party Transactions	Related Party TransactionsDuring 2022 and 2021, the Company has had transactions with its directors, executive officers and their affiliates and its employees. These transactions were made in the ordinary course of business and include extensions of credit and deposit transactions, all made on the same terms as the then prevailing market and credit terms extended to other customers. The Bank had approximately $23.1 million in deposits from related parties, including directors, stockholders and their affiliates at December 31, 2022 and $10.2 million at December 31, 2021.

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Assets
Cash and due from banks	$ 233,637	$ 180,663
Interest bearing cash and cash equivalents	4,778,623	7,765,996
Available-for-sale debt securities	2,615,644	3,538,201
Held-to-maturity debt securities	935,514	0
Equity securities	33,956	45,607
Investment securities	3,585,114	3,583,808
Loans held for sale	36,357	8,123
Loans held for investment, mortgage finance	4,090,033	7,475,497
Loans held for investment	15,197,307	15,331,457
Less: Allowance for credit losses on loans	(253,469)	(211,866)
Loans held for investment, net	19,033,871	22,595,088
Premises and equipment, net	26,382	20,901
Accrued interest receivable and other assets	719,162	559,897
Goodwill and intangible assets, net	1,496	17,262
Total assets	28,414,642	34,731,738
Deposits [Abstract]
Non-interest bearing deposits	9,618,081	13,390,370
Interest bearing deposits	13,238,799	14,718,995
Total deposits	22,856,880	28,109,365
Accrued interest payable	24,000	7,699
Other liabilities	345,827	273,488
Short-term borrowings	1,201,142	2,202,832
Long-term debt	931,442	928,738
Total liabilities	25,359,291	31,522,122
Stockholders’ equity:
Preferred stock	300,000	300,000
Common stock	509	506
Additional paid-in capital	1,025,593	1,008,559
Retained earnings	2,263,502	1,948,274
Treasury stock shares at cost: 2,083,535 and 417 at December 31, 2022 and 2021, respectively	(115,310)	(8)
Accumulated other comprehensive loss, net of taxes	(418,943)	(47,715)
Total stockholders’ equity	3,055,351	3,209,616
Total liabilities and stockholders’ equity	$ 28,414,642	$ 34,731,738

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, Liquidation value	$ 1,000	$ 1,000
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	300,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	50,867,298	50,618,911
Treasury stock, shares	2,083,535	417

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME AND OTHER COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest income
Interest and fees on loans	$ 983,787	$ 820,532	$ 993,670
Investment securities	63,179	42,820	17,475
Interest bearing cash and cash equivalents	97,271	13,233	28,262
Total interest income	1,144,237	876,585	1,039,407
Interest expense
Deposits	190,663	65,507	146,117
Short-term borrowings	29,077	4,613	22,006
Long-term debt	48,739	37,628	19,963
Total interest expense	268,479	107,748	188,086
Net interest income	875,758	768,837	851,321
Provision/(benefit) for credit losses	66,000	(30,000)	258,000
Net interest income after provision for credit losses	809,758	798,837	593,321
Non-interest income
Service charges on deposit accounts	22,876	18,674	11,620
Wealth management and trust fee income	15,036	13,173	9,998
Brokered loan fees	14,159	27,954	46,423
Servicing income	857	15,513	27,029
Investment banking and trading income	35,054	24,441	22,687
Net gain/(loss) on sale of loans held for sale	(990)	1,317	58,026
Gain on disposal of subsidiary	248,526	0	0
Other	14,011	37,158	27,198
Total non-interest income	349,529	138,230	202,981
Non-interest expense
Salaries and benefits	436,809	350,930	340,529
Occupancy expense	44,222	33,232	34,955
Marketing	32,388	10,006	23,581
Legal and professional	75,858	41,152	52,132
Communications and technology	69,253	75,185	103,054
Federal Deposit Insurance Corporation insurance assessment	14,344	21,027	25,955
Servicing-related expenses	0	27,765	64,585
Merger-related expenses	0	0	17,756
Other	54,658	39,715	41,809
Total non-interest expense	727,532	599,012	704,356
Income before income taxes	431,755	338,055	91,946
Income tax expense	99,277	84,116	25,657
Net income	332,478	253,939	66,289
Preferred stock dividends	(17,250)	(18,721)	(9,750)
Net income available to common stockholders	315,228	235,218	56,539
Other comprehensive income/(loss):
Change in unrealized gain/(loss)	(479,814)	(80,366)	8,639
Amounts reclassified into net income	9,905	0	0
Other comprehensive income/(loss)	(469,909)	(80,366)	8,639
Income tax expense/(benefit)	(98,681)	(16,877)	1,815
Other comprehensive income/(loss), net of tax	(371,228)	(63,489)	6,824
Comprehensive income/(loss)	$ (38,750)	$ 190,450	$ 73,113
Basic earnings per common share
Basic earnings per common share	$ 6.25	$ 4.65	$ 1.12
Diluted earnings per common share
Diluted earnings per common share	$ 6.18	$ 4.60	$ 1.12

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	[1]	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	[1]	Treasury Stock	Accumulated Other Comprehensive Income
Beginning balance, preferred stock (in shares) at Dec. 31, 2019				6,000,000
Beginning balance, common stock (in shares) at Dec. 31, 2019					50,338,158
Beginning balance, treasury stock (in shares) at Dec. 31, 2019										417
Beginning balance at Dec. 31, 2019	$ 2,801,321	$ (7,154)		$ 150,000	$ 503	$ 978,205	$ 1,663,671	$ (7,154)		$ (8)	$ 8,950
Comprehensive income/(loss):
Net income	66,289						66,289
Change in unrealized gain (loss) on available-for-sale securities, net of taxes	6,824										6,824
Comprehensive income	73,113
Stock-based compensation expense recognized in earnings	15,681					15,681
Preferred stock dividends	(9,750)						(9,750)
Issuance of stock related to stock-based awards (in shares)					132,709
Issuance of stock related to stock-based awards	(1,987)				$ 1	(1,988)
Ending balance, preferred stock (in shares) at Dec. 31, 2020				6,000,000
Ending balance, common stock (in shares) at Dec. 31, 2020					50,470,867
Ending balance, treasury stock (in shares) at Dec. 31, 2020										417
Ending balance at Dec. 31, 2020	2,871,224			$ 150,000	$ 504	991,898	1,713,056			$ (8)	15,774
Comprehensive income/(loss):
Net income	253,939						253,939
Change in unrealized gain (loss) on available-for-sale securities, net of taxes	(63,489)										(63,489)
Comprehensive income	190,450
Stock-based compensation expense recognized in earnings	30,061					30,061
Issuance of preferred stock (in shares)				300,000
Issuance of preferred stock	289,723			$ 300,000		(10,277)
Preferred stock dividends	(18,721)						(18,721)
Issuance of stock related to stock-based awards (in shares)					148,044
Issuance of stock related to stock-based awards	(3,121)				$ 2	(3,123)
Redemption of preferred stock (in shares)				(6,000,000)
Redemption of preferred stock	(150,000)			$ (150,000)
Ending balance, preferred stock (in shares) at Dec. 31, 2021				300,000
Ending balance, common stock (in shares) at Dec. 31, 2021					50,618,911
Ending balance, treasury stock (in shares) at Dec. 31, 2021										417
Ending balance at Dec. 31, 2021	3,209,616			$ 300,000	$ 506	1,008,559	1,948,274			$ (8)	(47,715)
Comprehensive income/(loss):
Net income	332,478						332,478
Change in unrealized gain (loss) on available-for-sale securities, net of taxes	(371,228)										(371,228)
Comprehensive income	(38,750)
Stock-based compensation expense recognized in earnings	21,246					21,246
Preferred stock dividends	(17,250)						(17,250)
Issuance of stock related to stock-based awards (in shares)					248,387
Issuance of stock related to stock-based awards	$ (4,209)				$ 3	(4,212)
Repurchase of common stock - shares	(2,083,118)									(2,083,118)
Repurchase of common stock	$ (115,302)									$ (115,302)
Ending balance, preferred stock (in shares) at Dec. 31, 2022				300,000
Ending balance, common stock (in shares) at Dec. 31, 2022					50,867,298
Ending balance, treasury stock (in shares) at Dec. 31, 2022										2,083,535
Ending balance at Dec. 31, 2022	$ 3,055,351			$ 300,000	$ 509	$ 1,025,593	$ 2,263,502			$ (115,310)	$ (418,943)
[1]Represents the impact of adopting Accounting Standard Update (“ASU”) 2016-13. See Note 1 - Operations and Summary of Significant Accounting Policies to the consolidated financial statements for more information.

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating activities
Net income	$ 332,478	$ 253,939	$ 66,289
Adjustments to reconcile net income to net cash provided by/(used in) operating activities:
Provision/(benefit) for credit losses	66,000	(30,000)	258,000
Deferred tax expense/(benefit)	(17,395)	(20,253)	(7,964)
Depreciation and amortization expense	45,284	93,406	74,925
Net (gain)/loss on sale of loans held for sale	990	(1,317)	(58,026)
Increase/(decrease) in valuation allowance on mortgage servicing rights	0	(16,448)	20,164
Stock-based compensation expense	21,432	31,326	17,441
Purchases and originations of loans held for sale	(37,461)	(1,413,899)	(11,366,986)
Proceeds from sales and repayments of loans held for sale	8,132	1,676,601	13,619,623
Gain on sale of subsidiary	(248,526)	0	0
Changes in operating assets and liabilities:
Accrued interest receivable and other assets	(25,482)	154,114	10,654
Accrued interest payable and other liabilities	2,518	(70,154)	5,749
Net cash provided by operating activities	147,970	657,315	2,639,869
Investing activities
Purchases of available-for sale debt securities	(920,217)	(1,059,897)	(3,001,746)
Proceeds from maturities, redemptions and pay-downs of available-for-sale debt securities	432,175	569,931	52,609
Proceeds from maturities, redemptions and pay-downs of held-to-maturity debt securities	87,945	0	0
Net decrease in equity securities	11,651	0	0
Originations of loans held for investment, mortgage finance	(102,438,943)	(167,084,439)	(216,234,122)
Proceeds from pay-offs of loans held for investment, mortgage finance	105,824,407	168,688,351	215,324,562
Proceeds from sale of mortgage servicing rights	0	115,891	0
Net (increase)/decrease in loans held for investment, excluding mortgage finance loans	(3,001,340)	7,076	926,176
Proceeds from sale of subsidiary	3,324,159	0	0
Purchase of premises and equipment, net	(11,270)	(4,127)	(2,796)
Net cash provided by/(used in) investing activities	3,308,567	1,232,786	(2,935,317)
Financing activities
Net increase/(decrease) in deposits	(5,252,485)	(2,887,224)	4,517,996
Issuance of stock related to stock-based awards	(4,209)	(3,121)	(1,986)
Net proceeds from issuance of preferred stock	0	289,723	0
Redemption of preferred stock	0	(150,000)	0
Preferred dividends paid	(17,250)	(18,721)	(9,750)
Repurchase of common stock	(115,302)	0	0
Net proceeds from issuance of long-term debt	0	639,440	0
Redemption of long-term debt	0	(111,000)	0
Net increase/(decrease) in short-term borrowings	(1,001,690)	(908,919)	569,985
Net cash provided by/(used in) financing activities	(6,390,936)	(3,149,822)	5,076,245
Net increase/(decrease) in cash and cash equivalents	(2,934,399)	(1,259,721)	4,780,797
Cash and cash equivalents at beginning of period	7,946,659	9,206,380	4,425,583
Cash and cash equivalents at end of period	5,012,260	7,946,659	9,206,380
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	252,178	111,199	189,696
Cash paid during the period for income taxes	128,435	101,101	26,152
Transfers of debt securities from available-for-sale to held-to-maturity	$ 1,019,365	$ 0	$ 0

Operations and Summary of Signi

Operations and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Operations and Summary of Significant Accounting Policies	Operations and Summary of Significant Accounting Policies Organization and Nature of Business Texas Capital Bancshares, Inc. (“TCBI” or the “Company”), a Delaware corporation, was incorporated in November 1996 and commenced banking operations in December 1998. The consolidated financial statements include the accounts of TCBI and its wholly owned subsidiary, Texas Capital Bank (the “Bank”). The Company serves the needs of commercial businesses, entrepreneurs and professionals located in Texas through a custom array of financial products and services with high-quality personal service. On September 6, 2022, the Company announced the sale of BankDirect Capital Finance, LLC (“BDCF”), its insurance premium finance subsidiary, to AFCO Credit Corporation, an indirect wholly-owned subsidiary of Truist Financial Corporation. The sale of BDCF included its business operations and loan portfolio of approximately $3.1 billion. The sale was an all-cash transaction for a purchase price of $3.4 billion, representing a pre-tax gain of $248.5 million. This transaction did not meet the criteria for discontinued operations reporting, and the sale was completed on November 1, 2022. Basis of Presentation The Company’s accounting and reporting policies conform to accounting principles generally accepted in the United States (“GAAP”) and to generally accepted practices within the banking industry. Certain prior period balances have been reclassified to conform to the current period presentation. 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. Actual results could differ from those estimates. The allowance for credit losses, the fair value of financial instruments and the status of contingencies are particularly susceptible to significant change. Basic and Diluted Earnings Per Common Share Basic earnings per common share is based on net income available to common stockholders divided by the weighted-average number of common shares outstanding during the period excluding non-vested stock-settled awards. Diluted earnings per common share include the dilutive effect of non-vested stock-settled awards granted using the treasury stock method. Cash and Cash Equivalents Cash equivalents include amounts due from banks, interest bearing deposits in other banks and federal funds sold. Investment Securities Investment securities include debt securities and equity securities. Debt Securities Debt securities are classified as trading, available-for-sale or held-to-maturity. Debt securities not classified as held-to-maturity or trading are classified as available-for-sale. Management classifies securities at the time of purchase and re-assesses such designation at each balance sheet date. The amortized cost of debt securities is adjusted for amortization of premiums and accretion of discounts to maturity, or in the case of mortgage-backed securities, over the estimated life of the security. Such amortization and accretion are included in interest income from investment securities. Gains or losses realized upon the sale of debt securities is recorded in other non-interest income on the consolidated statements of income and other comprehensive income. The cost of securities sold is based on the specific identification method. The Company has made a policy election to exclude accrued interest from the amortized cost basis of debt securities and report accrued interest separately in accrued interest and other assets on the consolidated balance sheets. Available-for-sale and held-to-maturity debt securities are placed on non-accrual status when management no longer expects to receive all contractual amounts due, which is generally at 90 days past due. Accrued interest receivable is reversed against interest income when a security is placed on non-accrual status. Accordingly, the Company does not recognize an allowance for credit loss against accrued interest receivable Trading Account Debt securities acquired for resale in anticipation of short-term market movements are classified as trading and recorded at fair value, with realized and unrealized gains and losses recognized in income. Held-to-Maturity Debt securities are classified as held-to-maturity when the Company has the positive intent and ability to hold the securities to maturity. Held-to-maturity securities are stated at amortized cost, net of any allowance for credit losses. Management may transfer debt securities classified as available-for-sale to held-to-maturity when upon reassessment it is determined that the Company has both the positive intent and ability to hold these securities to maturity. The debt securities are transferred at fair value resulting in a premium or discount recorded on transfer date. Unrealized gains or losses at the date of transfer continue to be reported as a separate component of accumulated other comprehensive income/loss, net (“AOCI”). The premium or discount and the unrealized gain or loss, net of tax, in AOCI will be amortized to interest income over the remaining life of the securities using the interest method. Available-for-Sale Available-for-sale debt securities are recorded at fair value, with unrealized gains and losses, net of tax, reported as a separate component of AOCI. For available-for-sale debt securities in an unrealized loss position, the Company first assesses whether it intends to sell, or it is more-likely-than-not that it will be required to sell, the securities before recovery of the amortized cost basis. If either of these criteria is met, the securities’ amortized cost basis is written down to fair value as a current period expense recorded on the consolidated statements of income and other comprehensive income. If either of the above criteria is not met, management evaluates whether the decline in fair value is the result of credit losses or other factors. In making this assessment, management may consider various factors including the extent to which fair value is less than amortized cost, performance of any underlying collateral and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected are compared to the amortized cost basis of the security and any excess is recorded as an allowance for credit losses, limited to the amount by which the fair value is less than the amortized cost basis. Any impairment not recorded through an allowance for credit losses is recognized in AOCI, net of tax, as a non-credit related impairment. Included in debt securities available-for-sale are credit risk transfer (“CRT”) securities, which represent unsecured obligations issued by government sponsored entities (“GSEs”) such as Freddie Mac and are designed to transfer mortgage credit risk from the GSE to private investors. CRT securities are structured to be subject to the performance of a reference pool of mortgage loans in which the Company shares in 50% of the first losses with the GSE. If the reference pool incurs losses, the amount the Company will recover on the notes is reduced by its share of the amount of such losses, which could potentially be up to 100% of the amount outstanding. Unrealized losses recognized in AOCI for the CRT securities are primarily related to the difference between the current market rate for similar securities and the stated interest rate and are not considered to be related to credit loss events. The CRT securities are generally interest-only for an initial period of time and may be restricted from being transferred until a future date. Equity Securities Equity securities with readily determinable fair values are stated at fair value with realized and unrealized gains and losses reported in income. Equity securities without readily determinable fair values are recorded at cost less any impairment. Loans Loans Held for Sale The Company transitioned its mortgage correspondent aggregation (“MCA”) program to a third party in 2021. Prior to transition, the Company committed to purchase residential mortgage loans from independent correspondent lenders and delivered those loans into the secondary market via whole loan sales to independent third parties or in securitization transactions to third parties such as Ginnie Mae or to GSEs. In some cases, the Company retained the mortgage servicing rights. Once purchased, these loans were classified as held for sale and carried at fair value pursuant to the election of the fair value option in accordance with Accounting Standards Codification (“ASC”) 825, Financial Instruments . At the commitment date, the Company entered into a corresponding forward sale commitment with a third party, typically Ginnie Mae or a GSE, to deliver the loans within a specified timeframe. The estimated gain/(loss) for the entire transaction (from initial purchase commitment to final delivery of loans) was recorded as an asset or liability. The fair value of loans held for sale is derived from observable current market prices, when available, and includes the fair value of the mortgage servicing rights. Adjustments to reflect unrealized gains and losses resulting from changes in fair value and realized gains and losses upon ultimate sale of the loans are classified as gain/(loss) on sale of loans held for sale on the consolidated statements of income and other comprehensive income. Residential mortgage loans held for sale are subject to both credit and interest rate risk. Credit risk is managed through underwriting policies and procedures, including collateral requirements, which are generally accepted by the secondary loan markets. Exposure to interest rate fluctuations is partially managed through forward sales contracts, which set the price for loans that will be delivered in the next 60 to 90 days. From time to time the Company holds for sale certain commercial loans and also the guaranteed portion of Small Business Administration 7(a) loans, which are carried at lower of cost or fair value. Loans Held for Investment Loans held for investment (including financing leases) are stated at the amount of unpaid principal reduced by unearned income, net of direct loan origination costs. Interest on loans is recognized using the simple interest method on the daily balances of the principal amounts outstanding. Loan origination fees, net of direct loan origination costs, and commitment fees are deferred and amortized as an adjustment to yield over the life of the loan, or over the commitment period, as applicable. Restructured loans are loans on which, due to the borrower’s financial difficulties, the Company has granted a concession that it would not otherwise consider for borrowers of similar credit quality. This may include a transfer of real estate or other assets from the borrower, a modification of loan terms, or a combination of the two. Modifications of terms that could potentially qualify as a restructuring include reduction of contractual interest rate, extension of the maturity date at a contractual interest rate lower than the current rate for new debt with similar risk, an adjustment to payment terms, a reduction of the face amount of debt or forgiveness of either principal or accrued interest. A loan continues to qualify as restructured until a consistent payment history or change in the borrower’s financial condition has been evidenced, generally for no less than twelve months. If the restructuring agreement specifies an interest rate at the time of the restructuring that is greater than or equal to the rate that the Company is willing to accept for a new extension of credit with comparable risk, then the loan is no longer considered a restructuring if it is in compliance with the modified terms in calendar years after the year of the restructure. A loan is considered past due when a contractually due payment has not been received by the contractual due date. The Company places a loan on non-accrual when there is a clear indication that the borrower’s cash flow may not be sufficient to meet payments as they become due, which is generally when a loan is 90 days past due. When a loan is placed on non-accrual status, all previously accrued and unpaid interest is reversed as a reduction of current period interest income. Interest income is subsequently recognized on a cash basis as long as the remaining book balance of the asset is deemed to be collectible. If collectability is questionable, then cash payments are applied to principal. A loan is placed back on accrual status when both principal and interest are current and it is probable that all amounts due will be collected (both principal and interest) according to the terms of the loan agreement. Loans held for investment includes legal ownership interests in mortgage loans that the Company purchases through its mortgage finance division. The ownership interests are purchased from unaffiliated mortgage originators who are seeking additional liquidity to facilitate their ability to originate loans. The mortgage originator has no obligation to offer and the Company has no obligation to purchase these interests. The originator closes mortgage loans consistent with underwriting standards established by approved investors, and, at the time of the sale to the investor, the Company’s ownership interest and that of the originator are delivered to the investor selected by the originator and approved. The Company typically purchases up to a 99% ownership interest in each mortgage with the originator owning the remaining percentage. These mortgage ownership interests are generally held for a period of less than 30 days and more typically 10-20 days. Because of conditions in agreements with originators designed to reduce transaction risks, under ASC 860, Transfers and Servicing of Financial Assets (“ASC 860”), the ownership interests do not qualify as participating interests. Under ASC 860, the ownership interests are deemed to be loans to the originators and payments received from investors are deemed to be payments made by or on behalf of the originator to repay the loan. Because the Company has an actual, legal ownership interest in the underlying residential mortgage loan, these interests are reported as extensions of credit to the originators that are secured by the mortgage loans as collateral. Due to market conditions or events of default by the investor or the originator, the Company could be required to purchase the remaining interests in the mortgage loans and hold them beyond the expected 10-20 days. Mortgage loans acquired under these conditions would require mark-to-market adjustments to income and could require further allocations of the allowance for credit losses or be subject to charge-off in the event the loans become impaired. Allowance for Credit Losses On January 1, 2020, the Company adopted ASU 2016-13 "Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments" ("ASU 2016-13"), which uses the current expected credit loss ("CECL") model to determine the allowance for credit losses. The measurement of expected credit losses under the CECL methodology is applicable to financial assets measured at amortized cost, including loan receivables and held-to-maturity debt securities. It also applies to off-balance sheet credit exposures not accounted for as insurance (loan commitments, standby letters of credit, financial guarantees, and other similar instruments) and net investments in leases recognized by a lessor in accordance with ASU 2016-02 "Leases (Topic 842)" . The following is discussion of the allowance for credit losses on loans held for investment. See “ Investment Securities - Debt Securities ” above for discussion of the allowance for credit losses on available-for-sale and held-to maturity debt securities. The CECL methodology recognizes lifetime expected credit losses immediately when a financial asset is originated or purchased. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of loans to present the net amount expected to be collected on the loans. Loans, or portions thereof, are charged off against the allowance when they are deemed uncollectible. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. Management estimates the allowance balance using relevant available information, from internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. Historical credit loss experience provides the basis for the estimation of expected credit losses. Adjustments to historical loss information are made for differences in current loan-specific risk characteristics such as differences in underwriting standards, portfolio mix, credit quality, or term, as well as for changes in macroeconomic conditions, such as changes in unemployment rates, crude oil prices, property values or other relevant factors. The allowance for credit losses is comprised of reserves measured on a collective (pool) basis based on a lifetime loss-rate model when similar risk characteristics exist. Reserves on loans that do not share risk characteristics are evaluated on an individual basis. In order to determine the allowance for credit losses, all loans are assigned a credit grade. Loans graded substandard or worse and greater than $500,000 are specifically reviewed for loss potential and when deemed appropriate are assigned a reserve based on an individual evaluation. For purposes of determining the pool-basis reserve, the remainder of the portfolio, representing all loans not assigned an individual reserve, is segregated first by portfolio segment, then by product type, to recognize differing risk profiles within portfolio segments, and finally by credit grade. Each credit grade within each product type is assigned a historical loss rate. These historical loss rates are then modified to incorporate a reasonable and supportable forecast of future losses at the portfolio segment level, as well as any necessary qualitative adjustments using a Portfolio Level Qualitative Factor (“PLQF”) and/or a Portfolio Segment Level Qualitative Factor (“SLQF”). These modified historical loss rates are multiplied by the outstanding principal balance of each loan to calculate a required reserve. A similar process is employed to calculate a reserve assigned to off-balance sheet commitments, specifically unfunded loan commitments and letters of credit, and any needed reserve is recorded in other liabilities on the consolidated balance sheets. The PLQF and SLQF are utilized to address factors that are not present in historical loss rates and are otherwise unaccounted for in the quantitative process. The PLQF is used to apply a qualitative adjustment across the entire portfolio of loans, while the SLQF is designed to apply a qualitative adjustment across a single portfolio segment. Even though portions of the allowance may be allocated to specific loans, the entire allowance is available for any credit that, in management’s judgment, should be charged off. The Company generally uses a two-year forecast period, based on a single forecast scenario or a blend of multiple forecast scenarios, using variables management believes are most relevant to each portfolio segment. For periods beyond which management is able to develop reasonable and supportable forecasts, they immediately revert to the average historical loss rate. The forecast period and scenario(s) used are reviewed on a quarterly basis and may be adjusted based on management's view of the current economic conditions and level of predictability the forecast can provide. Portfolio segments are used to pool loans with similar risk characteristics and align with the Company’s methodology for measuring expected credit losses. A summary of the primary portfolio segments is as follows: Commercial . The commercial loan portfolio is comprised of lines of credit for working capital, term loans and leases to finance equipment and other business assets across a variety of industries. These loans are used for general corporate purposes including financing working capital, internal growth, acquisitions and business insurance premiums and are generally secured by accounts receivable, inventory, equipment and other assets of clients’ businesses. The commercial loan portfolio also includes consumer loans because the Company’s small portfolio of consumer loans is largely comprised of accommodation loans to individuals associated with its commercial clients. Energy . The energy loan portfolio is primarily comprised of loans to exploration and production companies that are generally collateralized with proven reserves based on appropriate valuation standards that take into account the risk of oil and gas price volatility. The majority of this portfolio is first lien, senior secured, reserve-based lending, which the Company believes is the lowest-risk form of energy lending. Energy loans are impacted by commodity price volatility, as well as changes in consumer and business demand. Mortgage finance . Mortgage finance loans relate to mortgage warehouse lending operations in which the Company purchases mortgage loan ownership interests from unaffiliated mortgage originators that are generally held for a period of less than 30 days and more typically 10-20 days before they are sold to an approved investor. Volumes fluctuate based on the level of market demand for the product and the number of days between purchase and sale of the loans, which can be affected by changes in overall market interest rates and housing demand and tend to peak at the end of each month. Mortgage finance loans are consistently underwritten based on standards established by the approved investors. Market conditions or events of default by an investor or originator could require that the Company repurchases the remaining interests in the mortgage loans and hold them beyond the expected 10-20 days. Real estate . The real estate portfolio is comprised of the following types of loans: Commercial real estate (“CRE”) . The CRE portfolio is comprised of both construction/development financing and limited term financing provided to professional real estate developers and owners/managers of commercial real estate projects and properties who have a demonstrated record of past success with similar properties. Collateral properties include office buildings, warehouse/distribution buildings, shopping centers, hotels/motels, senior living, apartment buildings and residential and commercial tract development. The primary source of repayment on these loans is expected to come from the sale, permanent financing or lease of the real property collateral. CRE loans are impacted by fluctuations in collateral values, as well as the ability of the borrower to obtain permanent financing. Residential homebuilder finance (“RBF”) . The RBF portfolio is comprised of loans made to residential builders and developers. Loans to residential builders are typically in the form of uncommitted guidance lines and are for the purpose of developing lots into single-family homes, while loans to developers are typically in the form of borrowing base lines extended for the purpose of acquiring and developing raw land into lots that can be further sold to home builders. RBF loans, if not structured and monitored correctly, can be impacted by volatility in consumer demand, as well as fluctuation in housing prices. Secured by 1-4 family . This category of loans includes both first and second lien loans made for the purpose of purchasing or constructing 1-4 family residential dwellings, as well as home equity revolving lines of credit and loans to purchase lots for future construction of 1-4 family residential dwellings. Other . The “other” category is primarily comprised of real estate loans originated through a Small Business Administration (SBA) program where repayment is partially guaranteed by the SBA, as well as other loans secured by real estate where the primary source of repayment is not expected to come from the sale or lease of the real property collateral. The Company has several pass credit grades that are assigned to loans based on varying levels of risk, ranging from credits that are secured by cash or marketable securities, to watch credits which have all the characteristics of an acceptable credit risk but warrant more than the normal level of monitoring. Within the criticized/classified credit grades are special mention, substandard and doubtful. Special mention loans are those that are currently protected by the sound worth and paying capacity of the borrower, but that are potentially weak and constitute an additional credit risk. These loans have the potential to deteriorate to a substandard grade due to the existence of financial or administrative deficiencies. Substandard loans have a well-defined weakness or weaknesses that jeopardizes the liquidation of the debt. They are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Some substandard loans are inadequately protected by the sound worth and paying capacity of the borrower and of the collateral pledged and may be considered impaired. Substandard loans can be accruing or can be on non-accrual depending on the circumstances of the individual loans. Loans classified as doubtful have all the weaknesses inherent in substandard loans with the added characteristics that the weaknesses make collection in full highly questionable and improbable. The possibility of loss is extremely high. All doubtful loans are on non-accrual. The methodology used in the estimation of the allowance, which is performed at least quarterly, is designed to be dynamic and responsive to changes in portfolio credit quality and forecasted economic conditions. Changes are reflected in the pool-basis allowance and in reserves assigned on an individual basis as the collectability of classified loans is evaluated with new information. As the Company’s portfolio has matured, historical loss ratios have been closely monitored. The review of the appropriateness of the allowance is performed by executive management and presented to the audit and risk committees of the board of directors for their review. The committees report to the board as part of the board's quarterly review of the Company’s consolidated financial statements. When management determines that foreclosure is probable, and for certain collateral-dependent loans where foreclosure is not considered probable, expected credit losses are based on the estimated fair value of the collateral adjusted for selling costs, when appropriate. A loan is considered collateral-dependent when the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the operation or sale of the collateral. Expected credit losses are estimated over the contractual term of the loans, adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals and modifications unless either of the following applies: management has a reasonable expectation that a loan will be restructured or the extension or renewal options are included in the borrower contract and are not unconditionally cancellable. The Company does not measure an allowance for credit losses on accrued interest receivable balances because these balances are written off in a timely manner as a reduction to interest income when loans are placed on non-accrual status as discussed above. Other Real Estate Owned Other real estate owned (“OREO”), which is included in other assets on the consolidated balance sheet, consists of real estate that has been foreclosed. When foreclosure occurs, the acquired asset is recorded at fair value less selling costs, generally based on appraised value, which may result in partial charge-off of the loan through a charge to the allowance for credit losses, if necessary. Subsequent write-downs required for declines in value are recorded through a valuation allowance, or taken directly to the asset, and are recorded in other non-interest expense on the consolidated statements of income and other comprehensive income. Gains or losses on sale of OREO are recorded in other non-interest income on the consolidated statements of income and other comprehensive income. Goodwill and Other Intangible Assets, Net Intangible assets are acquired assets that lack physical substance but can be distinguished from goodwill because of contractual or other legal rights or because the asset is capable of being sold or exchanged either on its own or in combination with a related contract, asset or liability. The Company’s goodwill and intangible assets relate primarily to customer relationships purchased as part of business acquisitions. Intangible assets with definite useful lives are amortized over their estimated life. Goodwill and intangible assets are tested for impairment at least annually or whenever changes in circumstances indicate the carrying amount of the assets may not be recoverable from future undiscounted cash flows. If impaired, the assets are recorded at fair value. Premises and Equipment, Net Premises and equipment are stated at cost less accumulated depreciation and amortization. Depreciation is computed using the straight-line method over the estimated useful lives of the assets. Furniture and equipment is generally depreciated over three Software Costs incurred in connection with development or purchase of internal use software and cloud computing arrangements, including in-substance software licenses, are capitalized. Amortization is computed on a straight-line basis over the estimated useful life of the asset, which generally ranges from one Financial Instruments with Off-Balance Sheet Risk The Company has undertaken certain guarantee obligations in the ordinary course of business which include liabilities with off-balance sheet risk. The Company considers the following arrangements to be guarantees: commitments to extend credit, standby letters of credit and indemnification agreements included within third party contractual arrangements. The Company is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit that involve varying degrees of credit risk in excess of the amount recognized on the consolidated balance sheets. The Company’s exposure to credit loss in the event of non-performance by the other party to these financial instruments is represented by the contractual amount of the instruments. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. The amount of collateral obtained, if deemed necessary, is based on management’s credit evaluation of the borrower. 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. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. Commitments to extend credit do not include mortgage finance arrangements with mortgage loan originators through the mortgage warehouse lending division, which are established as uncommitted “guidance” purchase and sale facilities under which the mortgage originator has no obligation to offer and the Company has no obligation to purchase interests in the mortgage loans subject to the arrangements. Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. Those guarantees are primarily issued to support public and private borrowing arrangements. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. In conjunction with the sale and securitization of loans held for sale and their related servicing rights,

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2022
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The following table presents the computation of basic and diluted earnings per share: Year ended December 31, (in thousands except share and per share data) 2022 2021 2020 Numerator: Net income $ 332,478 $ 253,939 $ 66,289 Preferred stock dividends 17,250 18,721 9,750 Net income available to common stockholders $ 315,228 $ 235,218 $ 56,539 Denominator: Denominator for basic earnings per common share—weighted average common shares 50,457,746 50,580,660 50,430,326 Effect of dilutive outstanding stock-settled awards 588,996 560,314 152,653 Denominator for dilutive earnings per common share—weighted average diluted common shares 51,046,742 51,140,974 50,582,979 Basic earnings per common share $ 6.25 $ 4.65 $ 1.12 Diluted earnings per common share $ 6.18 $ 4.60 $ 1.12 Anti-dilutive outstanding stock-settled awards 311,226 93,945 453,024

Investment Securities

Investment Securities	12 Months Ended
	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities The following is a summary of the Company’s investment securities: (in thousands) Amortized Gross Gross Estimated December 31, 2022 Available-for-sale debt securities: U.S. Treasury securities $ 698,769 $ — $ (28,187) $ 670,582 U.S. government agency securities 125,000 — (22,846) 102,154 Residential mortgage-backed securities 2,162,364 3 (331,320) 1,831,047 Tax-exempt asset-backed securities — — — — CRT securities 14,713 — (2,852) 11,861 Total available-for-sale debt securities 3,000,846 3 (385,205) 2,615,644 Held-to-maturity debt securities: Residential mortgage-backed securities 935,514 — (118,600) 816,914 Total held-to-maturity debt securities 935,514 — (118,600) 816,914 Equity securities 33,956 Total investment securities(2) $ 3,585,114 December 31, 2021 Available-for-sale debt securities: U.S. government agency securities $ 125,000 $ — $ (4,056) $ 120,944 Residential mortgage-backed securities 3,288,261 156 (63,039) 3,225,378 Tax-exempt asset-backed securities 170,626 9,407 — 180,033 CRT securities 14,713 — (2,867) 11,846 Total available-for-sale debt securities 3,598,600 9,563 (69,962) 3,538,201 Equity securities 45,607 Total investment securities(2) $ 3,583,808 (1) Excludes accrued interest receivable of $6.6 million and $6.6 million at December 31, 2022 and December 31, 2021, respectively, related to available-for-sale debt securities and $1.5 million at December 31, 2022 related to held-to-maturity debt securities that is recorded in accrued interest receivable and other assets on the consolidated balance sheets. (2) Includes available-for-sale debt securities and equity securities at estimated fair value and held-to-maturity debt securities at amortized cost. Debt Securities In the first quarter of 2022, the Company transferred $1.0 billion of available-for-sale debt securities to held-to-maturity at fair value. The transfer was the result of deliberate actions taken to execute on asset-liability management strategies in response to rising interest rates. Management determined that it has both the positive intent and ability to hold these securities to maturity. There were no gains or losses recognized as a result of this transfer. In the second quarter of 2022, the Company’s tax-exempt asset-backed securities were redeemed at par. The outstanding certificates were cancelled and related trusts were terminated. Unrealized gains and losses previously recorded, net of tax, in AOCI were reversed and no additional gains or losses were recognized as a result of the redemption. The amortized cost and estimated fair value as of December 31, 2022, excluding accrued interest receivable, of available-for-sale and held-to-maturity debt securities are presented below by contractual maturity. Actual maturities may differ from contractual maturities of mortgage-backed securities because borrowers may have the right to call or prepay obligations with or without prepayment penalties. Available-for-sale Held-to-maturity (in thousands) Amortized Cost Fair Value Amortized Cost Fair Value Due within one year $ 14 $ 14 $ — $ — Due after one year through five years 698,769 670,582 — — Due after five years through ten years 156,551 128,026 — — Due after ten years 2,145,512 1,817,022 935,514 816,914 Total $ 3,000,846 $ 2,615,644 $ 935,514 $ 816,914 The following table discloses the Company’s available-for-sale debt securities that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for 12 or more months: Less Than 12 Months 12 Months or Longer Total (in thousands) Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss December 31, 2022 U.S. Treasury securities $ 670,582 $ (28,187) $ — $ — $ 670,582 $ (28,187) U.S. government agency securities — — 102,154 (22,846) 102,154 (22,846) Residential mortgage-backed securities 261,502 (9,481) 1,569,107 (321,839) 1,830,609 (331,320) CRT securities — — 11,861 (2,852) 11,861 (2,852) Total $ 932,084 $ (37,668) $ 1,683,122 $ (347,537) $ 2,615,206 $ (385,205) December 31, 2021 U.S. government agency securities $ 24,085 $ (915) $ 96,859 $ (3,141) $ 120,944 $ (4,056) Residential mortgage-backed securities 2,871,052 (50,721) 303,491 (12,318) 3,174,543 (63,039) CRT securities — — 11,846 (2,867) 11,846 (2,867) Total $ 2,895,137 $ (51,636) $ 412,196 $ (18,326) $ 3,307,333 $ (69,962) At December 31, 2022, the Company had 103 available-for-sale debt securities in an unrealized loss position, comprised of 13 U.S. Treasury securities, five U.S. government agency securities, 83 residential mortgage-backed securities and two CRT securities. The unrealized losses on the available-for-sale debt securities were the result of changes in market interest rates compared to the date the securities were acquired rather than the credit quality of the issuers or underlying loans. The Company does not intend to sell and it is not more likely than not that the Company will be required to sell these available-for-sale debt securities before recovery of the amortized cost of such securities in an unrealized loss position and has, therefore recorded the unrealized losses related to this portfolio in AOCI. Held-to-maturity securities consist of government guaranteed securities for which no loss is expected. At December 31, 2022 and December 31, 2021, no allowance for credit losses was established for available-for-sale or held-to-maturity debt securities. Debt securities with carrying values of approximately $16.1 million and $1.4 million were pledged to secure certain customer repurchase agreements and deposits, respectively, at December 31, 2022. The comparative amounts at December 31, 2021 were $22.0 million and $2.0 million, respectively. Equity Securities Equity securities consist of investments that qualify for consideration under the regulations implementing the Community Reinvestment Act and investments related to the Company’s non-qualified deferred compensation plan. The following is a summary of unrealized and realized gains/(losses) recognized on equity securities included in other non-interest income on the consolidated statements of income and other comprehensive income: Year Ended December 31, 2022 (in thousands) 2022 2021 Net gains/(losses) recognized during the period $ (7,876) 2,277 Less: Realized net gains/(losses) recognized on securities sold 714 1,065 Unrealized net gains/(losses) recognized on securities still held $ (8,590) 1,212

Loans Held for Investment and A

Loans Held for Investment and Allowance for Loan Losses	12 Months Ended
	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Loans Held for Investment and Allowance for Loan Losses	Loans and Allowance for Credit Losses on Loans Loans are summarized by portfolio segment as follows: December 31, (in thousands) 2022 2021 Loans held for investment(1): Commercial $ 8,902,948 $ 9,897,561 Energy 1,159,296 721,373 Mortgage finance 4,090,033 7,475,497 Real estate 5,198,643 4,777,530 Gross loans held for investment 19,350,920 22,871,961 Unearned income (net of direct origination costs) (63,580) (65,007) Total loans held for investment 19,287,340 22,806,954 Allowance for credit losses on loans (253,469) (211,866) Total loans held for investment, net $ 19,033,871 $ 22,595,088 Loans held for sale: Mortgage loans, at fair value $ — $ 8,123 Non-mortgage loans, at lower of cost or fair value 36,357 — Total loans held for sale $ 36,357 $ 8,123 (1) Excludes accrued interest receivable of $100.4 million and $50.9 million at December 31, 2022 and December 31, 2021, respectively, that is recorded in accrued interest receivable and other assets on the consolidated balance sheets. The following tables summarize gross loans held for investment by year of origination and internally assigned credit grades: (in thousands) 2022 2021 2020 2019 2018 2017 and prior Revolving lines of credit Revolving lines of credit converted to term loans Total December 31, 2022 Commercial (1-7) Pass $ 1,903,529 $ 671,459 $ 244,568 $ 255,444 $ 325,201 $ 244,373 $ 4,877,753 $ 21,063 $ 8,543,390 (8) Special mention 9,141 7,740 3,628 37,794 11,998 4,975 95,310 2,250 172,836 (9) Substandard - accruing 18,670 71,147 514 1,666 14,933 6,305 30,070 — 143,305 (9+) Non-accrual 376 512 751 30,425 6,226 2,520 2,607 — 43,417 Total commercial $ 1,931,716 $ 750,858 $ 249,461 $ 325,329 $ 358,358 $ 258,173 $ 5,005,740 $ 23,313 $ 8,902,948 Energy (1-7) Pass $ 124,691 $ 12,517 $ — $ — $ — $ 3,317 $ 1,007,776 $ — $ 1,148,301 (8) Special mention — — — — — — — — — (9) Substandard - accruing — — — — — — 7,337 — 7,337 (9+) Non-accrual — — — — — — 3,658 — 3,658 Total energy $ 124,691 $ 12,517 $ — $ — $ — $ 3,317 $ 1,018,771 $ — $ 1,159,296 Mortgage finance (1-7) Pass $ 30,485 $ 482,477 $ 197,045 $ 267,758 $ 464,753 $ 2,647,515 $ — $ — $ 4,090,033 (8) Special mention — — — — — — — — — (9) Substandard - accruing — — — — — — — — — (9+) Non-accrual — — — — — — — — — Total mortgage finance $ 30,485 $ 482,477 $ 197,045 $ 267,758 $ 464,753 $ 2,647,515 $ — $ — $ 4,090,033 Real estate CRE (1-7) Pass $ 1,085,254 $ 756,180 $ 563,341 $ 447,346 $ 183,634 $ 284,698 $ 97,337 $ 11,944 $ 3,429,734 (8) Special mention 2,765 6,524 37,791 5,295 19,350 3,652 — — 75,377 (9) Substandard - accruing — 17,850 — — 11,458 17,698 — — 47,006 (9+) Non-accrual — — — — — 182 — — 182 RBF (1-7) Pass 94,066 70,951 12,161 6,106 2,655 — 326,164 — 512,103 (8) Special mention — — — — — — — — — (9) Substandard - accruing 7,840 — — — — — — — 7,840 (9+) Non-accrual — — — — — — — — — Other (1-7) Pass 182,840 131,538 94,611 67,518 76,951 163,838 42,333 31,293 790,922 (8) Special mention 729 — 8,721 — — 386 — — 9,836 (9) Substandard - accruing — — — 247 — 1,035 — — 1,282 (9+) Non-accrual — — 1,081 — — — — — 1,081 Secured by 1-4 family (1-7) Pass 64,050 89,967 53,003 24,314 16,953 70,082 4,911 — 323,280 (8) Special mention — — — — — — — — — (9) Substandard - accruing — — — — — — — — — (9+) Non-accrual — — — — — — — — — Total real estate $ 1,437,544 $ 1,073,010 $ 770,709 $ 550,826 $ 311,001 $ 541,571 $ 470,745 $ 43,237 $ 5,198,643 Total $ 3,524,436 $ 2,318,862 $ 1,217,215 $ 1,143,913 $ 1,134,112 $ 3,450,576 $ 6,495,256 $ 66,550 $ 19,350,920 (in thousands) 2021 2020 2019 2018 2017 2016 and prior Revolving lines of credit Revolving lines of credit converted to term loans Total December 31, 2021 Commercial (1-7) Pass $ 1,133,013 $ 3,157,150 $ 546,520 $ 319,246 $ 200,478 $ 289,795 $ 3,960,706 $ 41,377 $ 9,648,285 (8) Special mention 2,650 5,277 23,129 8,697 39 5,322 5,120 7,883 58,117 (9) Substandard - accruing — 7,705 102,619 25,010 6,202 6,962 14,742 2,007 165,247 (9+) Non-accrual 736 1,191 49 12,955 1,166 6,196 3,619 — 25,912 Total commercial $ 1,136,399 $ 3,171,323 $ 672,317 $ 365,908 $ 207,885 $ 308,275 $ 3,984,187 $ 51,267 $ 9,897,561 Energy (1-7) Pass $ 71,750 $ — $ — $ 3 $ — $ 7,188 $ 577,988 $ — $ 656,929 (8) Special mention — — — — — — 27,421 — 27,421 (9) Substandard - accruing — — — — — 8,643 — — 8,643 (9+) Non-accrual — — — — — — 28,380 — 28,380 Total energy $ 71,750 $ — $ — $ 3 $ — $ 15,831 $ 633,789 $ — $ 721,373 Mortgage finance (1-7) Pass $ 289,042 $ 590,616 $ 656,445 $ 754,507 $ 332,001 $ 4,852,886 $ — $ — $ 7,475,497 (8) Special mention — — — — — — — — — (9) Substandard - accruing — — — — — — — — — (9+) Non-accrual — — — — — — — — — Total mortgage finance $ 289,042 $ 590,616 $ 656,445 $ 754,507 $ 332,001 $ 4,852,886 $ — $ — $ 7,475,497 Real estate CRE (1-7) Pass $ 497,462 $ 576,344 $ 600,005 $ 294,005 $ 155,252 $ 451,042 $ 73,988 $ 25,970 $ 2,674,068 (8) Special mention — — 291 8,827 20,089 26,344 — — 55,551 (9) Substandard - accruing 17,850 — — 40,900 37,393 38,188 — 2,308 136,639 (9+) Non-accrual — — — — — 198 — — 198 RBF (1-7) Pass 155,595 44,362 9,693 8,565 — 12,732 460,888 — 691,835 (8) Special mention — — — — — — — — — (9) Substandard - accruing — — — — — — — — — (9+) Non-accrual — — — — — — — — — Other (1-7) Pass 166,202 148,811 119,017 106,343 61,723 139,723 47,653 29,595 819,067 (8) Special mention — 7,365 — — 845 4,982 — — 13,192 (9) Substandard - accruing — 6,424 — — 16,922 20,184 — — 43,530 (9+) Non-accrual — — — — 2,641 1,450 — 13,741 17,832 Secured by 1-4 family (1-7) Pass 96,899 60,659 40,586 22,976 31,826 65,910 4,535 — 323,391 (8) Special mention — 553 — — — 291 — — 844 (9) Substandard - accruing — — — — — 1,203 — — 1,203 (9+) Non-accrual — — — — — 180 — — 180 Total real estate $ 934,008 $ 844,518 $ 769,592 $ 481,616 $ 326,691 $ 762,427 $ 587,064 $ 71,614 $ 4,777,530 Total $ 2,431,199 $ 4,606,457 $ 2,098,354 $ 1,602,034 $ 866,577 $ 5,939,419 $ 5,205,040 $ 122,881 $ 22,871,961 The following table details activity in the allowance for credit losses on loans. Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories. (in thousands) Commercial Energy Mortgage Real Total Year Ended December 31, 2022 Beginning balance $ 102,202 $ 52,568 $ 6,083 $ 51,013 $ 211,866 Provision for credit losses on loans 51,571 (981) 4,662 6,220 61,472 Charge-offs 17,614 5,605 — 350 23,569 Recoveries 682 3,018 — — 3,700 Net charge-offs (recoveries) 16,932 2,587 — 350 19,869 Ending balance $ 136,841 $ 49,000 $ 10,745 $ 56,883 $ 253,469 Year Ended December 31, 2021 Beginning balance $ 73,061 $ 84,064 $ 4,699 $ 92,791 $ 254,615 Provision for credit losses on loans 36,733 (27,045) 1,384 (40,903) (29,831) Charge-offs 11,987 6,418 — 1,192 19,597 Recoveries 4,395 1,967 — 317 6,679 Net charge-offs (recoveries) 7,592 4,451 — 875 12,918 Ending balance $ 102,202 $ 52,568 $ 6,083 $ 51,013 $ 211,866 The Company recorded a $61.5 million provision for credit losses for the year ended December 31, 2022, compared to a $29.8 million negative provision for the same period of 2021. The $61.5 million provision for credit losses resulted primarily from updated views on the downside risks to the economic forecast and an increase in net charge-offs during 2022. Net charge-offs for the year ended December 31, 2022 were $19.9 million, compared to $12.9 million during the same period of 2021. Criticized loans totaled $513.2 million at December 31, 2022 and $582.9 million at December 31, 2021. A loan is considered collateral-dependent when the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the operation or sale of the collateral. There were no loans that met these criteria at December 31, 2022. The table below provides an age analysis of loans held for investment: (in thousands) 30-59 Days 60-89 Days 90 Days or More Past Due Total Past Non-accrual(2) Current Total Non-accrual With No Allowance December 31, 2022 Commercial $ 6,714 $ 3,041 $ 131 $ 9,886 $ 43,417 $ 8,849,645 $ 8,902,948 $ 41,476 Energy — — — — 3,658 1,155,638 1,159,296 3,658 Mortgage finance — — — — — 4,090,033 4,090,033 — Real estate CRE 440 — — 440 182 3,551,677 3,552,299 — RBF — — — — — 519,943 519,943 — Other 2,438 — — 2,438 1,081 799,602 803,121 — Secured by 1-4 family — — — — — 323,280 323,280 — Total $ 9,592 $ 3,041 $ 131 $ 12,764 $ 48,338 $ 19,289,818 $ 19,350,920 $ 45,134 (1) As of December 31, 2022 $2.2 million of non-accrual loans were earning interest income on a cash basis compared to none as of December 31, 2021. Additionally, $801,000 and $624,000 of interest income was recognized on non-accrual loans for the years ended December 31, 2022 and 2021, respectively. Accrued interest of $1.6 million and $1.2 million was reversed during the years ended December 31, 2022 and 2021, respectively. As of December 31, 2022 and December 31, 2021, the Company did not have any loans considered restructured that were not on non-accrual. Of the non-accrual loans at December 31, 2022 and 2021, $531,000 and $19.4 million, respectively, met the criteria for restructured. These loans had no unfunded commitments at their respective balance sheet dates. The following table details the recorded investment at December 31, 2022 of loans restructured during the year ended December 31, 2022: Extended Maturity Adjusted Payment Schedule Total (dollars in thousands) Number of Contracts Balance at Period End Number of Contracts Balance at Period End Number of Contracts Balance at Period End Year Ended December 31, 2022 Commercial — $ — 1 $ 531 1 $ 531 Total — — 1 531 1 531 The Company did not have any loans that were restructured during the year ended December 31, 2021. The restructuring of these loans did not have a significant impact on the allowance for credit losses at December 31, 2022 or 2021. As of December 31, 2022 and 2021, the Company did not have any loans that were restructured within the last 12 months that subsequently defaulted.

Leases

Leases	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
Leases	Leases The following table presents ROU assets and lease liabilities: Year Ended December 31, (in thousands) 2022 2021 ROU assets: Finance leases $ 2,865 $ 259 Operating leases 79,889 55,330 Total $ 82,754 $ 55,589 Lease liabilities Finance leases $ 2,877 $ 259 Operating leases 103,814 69,184 Total $ 106,691 $ 69,443 As of December 31, 2022, operating leases had remaining lease terms of generally 1 year to 17 years, while finance leases had remaining terms of generally 2 years. The table below summarizes the Company’s net lease cost: Year Ended December 31, (in thousands) 2022 2021 Finance lease cost: Amortization of ROU assets $ 1,108 $ 32 Interest on lease liabilities 34 1 Operating lease cost 23,463 15,608 Short-term lease cost 19 19 Variable lease cost 5,122 4,747 Sublease income (18) (107) Net lease cost $ 29,728 $ 20,299 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from finance leases $ 34 $ 1 Operating cash flows from operating leases 21,910 17,666 Financing cash flows from finance leases 1,096 32 ROU assets obtained in exchange for new finance leases 3,714 291 ROU assets obtained in exchange for new operating leases 57,544 2,109 The table below summarizes other information related to operating and finance leases: Year Ended December 31, 2022 2021 Weighted-average remaining lease term - finance leases, in years 2.2 2.7 Weighted-average remaining lease term - operating leases, in years 11.5 5.9 Weighted-average discount rate - finance leases 1.74 % 0.77 % Weighted-average discount rate - operating leases 4.16 % 2.30 % The table below summarizes the maturity of remaining lease liabilities as of December 31, 2022: (in thousands) Finance Leases Operating Leases Total 2023 $ 1,367 $ 16,993 $ 18,360 2024 1,334 13,130 14,464 2025 237 9,756 9,993 2026 — 10,022 10,022 2027 — 9,921 9,921 2028 and thereafter — 78,306 78,306 Total lease payments 2,938 138,128 141,066 Less: Interest (61) (34,314) (34,375) Present value of lease liabilities $ 2,877 $ 103,814 $ 106,691

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill and other intangible assets are summarized as follows: (in thousands) Goodwill and Intangible Assets Accumulated Goodwill and Intangible Assets, Net December 31, 2022 Goodwill $ 1,870 $ (374) $ 1,496 Intangible assets—customer relationships and trademarks — — — Total goodwill and intangible assets $ 1,870 $ (374) $ 1,496 December 31, 2021 Goodwill $ 15,468 $ (374) $ 15,094 Intangible assets—customer relationships and trademarks 9,006 (6,838) 2,168 Total goodwill and intangible assets $ 24,474 $ (7,212) $ 17,262 On November 1, 2022, the sale of BDCF was completed, resulting in the removal of goodwill and other intangible assets, net of accumulated amortization, of $15.4 million. In 2022 and 2021, the annual test of goodwill impairment was performed, and in both periods, no impairment was indicated.

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Premises and Equipment	Premises & Equipment Premises and equipment are summarized as follows: December 31, (in thousands) 2022 2021 Premises $ 34,930 $ 32,609 Furniture and equipment 54,581 43,852 Total cost 89,511 76,461 Accumulated depreciation (63,129) (55,560) Total premises and equipment, net $ 26,382 $ 20,901 Depreciation and amortization expense for the above premises and equipment was approximately $9.5 million, $8.1 million and $9.5 million in 2022, 2021 and 2020, respectively.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2022
Deposits [Abstract]
Deposits	Deposits Deposits are summarized as follows: December 31, (in thousands) 2022 2021 Non-interest bearing deposits $ 9,618,081 $ 13,390,370 Interest bearing deposits: Transaction 683,562 2,837,521 Savings 11,042,658 10,682,768 Time 1,512,579 1,198,706 Total interest bearing deposits 13,238,799 14,718,995 Total deposits $ 22,856,880 $ 28,109,365 The scheduled maturities of interest bearing time deposits were as follows at December 31, 2022: (in thousands) 2023 $ 1,482,377 2024 26,777 2025 3,272 2026 52 2027 101 2028 and after — Total $ 1,512,579 At December 31, 2022 and 2021, interest bearing time deposits greater than $250,000 were approximately $258.4 million and $186.0 million, respectively.

Short-Term Borrowings and Long-

Short-Term Borrowings and Long-Term Debt	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
Short-Term Borrowings and Long-Term Debt	Short-Term Borrowings and Long-Term Debt The table below presents a summary of the Company’s short-term borrowings, all of which mature within one year: (dollars in thousands) Federal Funds Purchased Customer Repurchase Agreements FHLB Borrowings December 31, 2022 Amount outstanding at year-end $ — $ 1,142 $ 1,200,000 Interest rate at year-end — % 0.25 % 4.25 % Average balance outstanding during the year $ 30,741 $ 1,928 $ 1,797,082 Weighted-average interest rate during the year 1.17 % 0.28 % 1.60 % Maximum month-end outstanding during the year $ 525,000 $ 2,320 $ 2,650,000 December 31, 2021 Amount outstanding at year-end $ — $ 2,832 $ 2,200,000 Interest rate at year-end — % 0.25 % 0.13 % Average balance outstanding during the year $ 88,916 $ 4,199 $ 2,306,165 Weighted-average interest rate during the year 0.15 % 0.28 % 0.19 % Maximum month-end outstanding during the year $ 302,301 $ 5,487 $ 2,600,000 The table below presents a summary of long-term debt: December 31, (in thousands) 2022 2021 Bank-issued floating rate senior unsecured credit-linked notes due 2024 $ 272,492 $ 270,487 Bank-issued 5.25% fixed rate subordinated notes due 2026 174,196 173,935 Company-issued 4.00% fixed rate subordinated notes due 2031 371,348 370,910 Trust preferred floating rate subordinated debentures due 2032 to 2036 113,406 113,406 Total long-term debt $ 931,442 $ 928,738 The following table summarizes the significant terms of the Company’s trust preferred subordinated debentures: (dollars in thousands) Texas Capital Texas Capital Texas Capital Texas Capital Texas Capital Date issued November 19, 2002 April 10, 2003 October 6, 2005 April 28, 2006 September 29, 2006 Trust preferred securities issued $10,310 $10,310 $25,774 $25,774 $41,238 Floating or fixed rate securities Floating Floating Floating Floating Floating Interest rate on subordinated debentures 3 month LIBOR + 3.35% 3 month LIBOR + 3.25% 3 month LIBOR + 1.51% 3 month LIBOR + 1.60% 3 month LIBOR + 1.71% Maturity date November 2032 April 2033 December 2035 June 2036 December 2036

Financial Instruments with Off-

Financial Instruments with Off-Balance Sheet Risk	12 Months Ended
	Dec. 31, 2022
Risks and Uncertainties [Abstract]
Financial Instruments with Off-Balance Sheet Risk	Financial Instruments with Off-Balance Sheet Risk The table below presents the Company’s financial instruments with off-balance sheet risk, as well as the activity in the allowance for off-balance sheet credit losses related to those financial instruments: Year Ended December 31, (in thousands) 2022 2021 Beginning balance of allowance for off-balance sheet credit losses $ 17,265 $ 17,434 Provision for off-balance sheet credit losses 4,528 (169) Ending balance of allowance for off-balance sheet credit losses $ 21,793 $ 17,265 December 31, (in thousands) 2022 2021 Commitments to extend credit - period end balance $ 9,673,082 $ 9,445,763 Standby letters of credit - period end balance 417,896 357,672

Regulatory Ratios and Capital

Regulatory Ratios and Capital	12 Months Ended
	Dec. 31, 2022
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Regulatory Ratios and Capital	Regulatory Ratios and Capital The Company and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory (and possibly additional discretionary) actions by regulators that, if undertaken, could have a direct material adverse effect on the Company’s and the Bank’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of the Company’s and the Bank’s assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. The Company’s and the Bank’s capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. The Basel III regulatory capital framework (the “Basel III Capital Rules”) adopted by U.S. federal regulatory authorities, among other things, (i) establishes the capital measure called “Common Equity Tier 1” (“CET1”), (ii) specifies that Tier 1 capital consist of CET1 and “Additional Tier 1 Capital” instruments meeting stated requirements, (iii) requires that most deductions/adjustments to regulatory capital measures be made to CET1 and not to other components of capital and (iv) defines the scope of the deductions/adjustments to the capital measures. Additionally, the Basel III Capital Rules require that the Company maintains a 2.5% capital conservation buffer with respect to each of CET1, Tier 1 and total capital to risk-weighted assets, which provides for capital levels that exceed the minimum risk-based capital adequacy requirements. A financial institution with a conservation buffer of less than the required amount is subject to limitations on capital distributions, including dividend payments and stock repurchases, and certain discretionary bonus payments to executive officers. No dividends were declared or paid on the Company’s common stock during 2022, 2021 or 2020. On April 19, 2022, the Company’s board of directors authorized the Company to repurchase up to $150.0 million in shares of its outstanding common stock. During the year ended December 31, 2022, the Company repurchased 2,083,118 shares of its common stock for an aggregate price of $115.3 million, at a weighted average price of $55.35 per share. On January 18, 2023, the Company’s board of directors authorized a new share repurchase program under which the Company may repurchase up to $150.0 million in shares of its outstanding common stock. In February 2019, the federal bank regulatory agencies issued a final rule (the “2019 CECL Rule”) that revised certain capital regulations to account for changes to credit loss accounting under GAAP. The 2019 CECL Rule included a transition option that allows banking organizations to phase in, over a three-year period, the day-one adverse effects of adopting the new accounting standard related to the measurement of current expected credit losses on their regulatory capital ratios (three-year transition option). In March 2020, the federal bank regulatory agencies issued an interim final rule that maintains the three-year transition option of the 2019 CECL Rule and also provides banking organizations that were required under GAAP to implement CECL before the end of 2020 the option to delay for two years an estimate of the effect of CECL on regulatory capital, relative to the incurred loss methodology's effect on regulatory capital, followed by a three-year transition period (five-year transition option). The Company adopted CECL on January 1, 2020 and have elected to utilize the five-year transition option. Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios of CET1, Tier 1 and total capital to risk-weighted assets, and of Tier 1 capital to average assets, each as defined in the regulations. Management believes, as of December 31, 2022, that the Company and the Bank meet all capital adequacy requirements to which they are subject. Financial institutions are categorized as well capitalized based on total risk-based, Tier 1 risk-based, CET1 and Tier 1 leverage ratios. As shown in the table below, the Company’s and Bank’s capital ratios exceeded the regulatory definition of well capitalized as of December 31, 2022 and 2021. The regulatory authorities can apply changes in classification of assets and such changes may retroactively subject the Company and the Bank to changes in capital ratios. Any such change could reduce one or more capital ratios below well capitalized status. In addition, a change may result in imposition of additional assessments by the FDIC or could result in regulatory actions that could have a material effect on the Bank’s condition and results of operations. Because the Bank had less than $15.0 billion in total consolidated assets as of December 31, 2009, it is allowed to continue to classify the trust preferred securities, all of which were issued prior to May 19, 2010, as Tier 1 capital. At the beginning of each of the last five years of the life of the Bank issued fixed rate subordinated notes due 2026, the amount that is eligible to be included in Tier 2 capital is reduced by 20% of the original amount of the notes (net of redemptions). In 2022, the amount of the notes that qualify as Tier 2 capital has been reduced by 40%. The table below summarizes the Company’s and the Bank’s actual and required capital ratios under the Basel III Capital Rules. The ratios presented below include the effects of the election to utilize the five-year CECL transition described above. Actual Minimum Capital Required(2) Capital Required to be Well Capitalized (dollars in thousands) Capital Amount Ratio Capital Amount Ratio Capital Amount Ratio December 31, 2022 CET1 Company $ 3,180,208 13.00 % $ 1,712,608 7.00 % N/A N/A Bank 3,408,178 13.95 % 1,710,056 7.00 % 1,587,909 6.50 % Total capital (to risk-weighted assets) Company 4,331,098 17.70 % 2,568,912 10.50 % 2,446,583 10.00 % Bank 3,987,720 16.32 % 2,565,083 10.50 % 2,442,937 10.00 % Tier 1 capital (to risk-weighted assets) Company 3,590,208 14.67 % 2,079,595 8.50 % 1,467,950 6.00 % Bank 3,568,178 14.61 % 2,076,496 8.50 % 1,954,349 8.00 % Tier 1 capital (to average assets)(1) Company 3,590,208 11.54 % 1,244,494 4.00 % N/A N/A Bank 3,568,178 11.48 % 1,243,232 4.00 % 1,554,039 5.00 % December 31, 2021 CET1 Company $ 2,949,785 11.06 % $ 1,866,444 7.00 % N/A N/A Bank 3,013,170 11.30 % 1,866,303 7.00 % 1,732,996 6.50 % Total capital (to risk-weighted assets) Company 4,085,540 15.32 % 2,799,666 10.50 % 2,666,348 10.00 % Bank 3,578,014 13.42 % 2,799,455 10.50 % 2,666,148 10.00 % Tier 1 capital (to risk-weighted assets) Company 3,359,785 12.60 % 2,266,396 8.50 % 1,599,809 6.00 % Bank 3,173,170 11.90 % 2,266,225 8.50 % 2,132,918 8.00 % Tier 1 capital (to average assets)(1) Company 3,359,785 9.01 % 1,490,902 4.00 % N/A N/A Bank 3,173,170 8.51 % 1,490,677 4.00 % 1,863,346 5.00 % (1) The Tier 1 capital ratio (to average assets) is not impacted by the Basel III Capital Rules; however, the Federal Reserve Board and the FDIC may require the Company and the Bank, respectively, to maintain a Tier 1 capital ratio (to average assets) above the required minimum. (2) Percentages represent the minimum capital ratios plus, as applicable, the fully phased-in 2.5% CET1 capital buffer under the Basel III Capital Rules. The Company is required to maintain reserve balances in cash and on deposit with the Federal Reserve based on a percentage of transactional deposits; however, the Federal Reserve reduced the reserve requirement ratio to zero effective March 26, 2020, therefore the total requirement was zero at both December 31, 2022 and 2021.

Stock-Based Compensation and Em

Stock-Based Compensation and Employee Benefits	12 Months Ended
	Dec. 31, 2022
Compensation Related Costs [Abstract]
Stock-Based Compensation and Employee Benefits	Stock-Based Compensation and Employee Benefits The Company has a qualified retirement plan with a salary deferral feature designed to qualify under Section 401 of the Internal Revenue Code (“the 401(k) Plan”). The 401(k) Plan permits employees to defer a portion of their compensation. Matching contributions may be made in amounts and at times determined by the Company. These contributions were approximately $13.3 million, $10.2 million and $10.3 million for the years ended December 31, 2022, 2021 and 2020, respectively. Employees are eligible to participate in the 401(k) Plan when they meet certain requirements concerning minimum age and period of credited service. All contributions to the 401(k) Plan are invested in accordance with participant elections among certain investment options. The Company also offers a non-qualified deferred compensation plan for executives and key members of management in order to assist in attracting and retaining these individuals. Participants in the plan may elect to defer up to 75% of their annual salary and/or short-term incentive payout into deferral accounts that mirror the gains or losses of investments selected by the participants. The plan allows the Company to make discretionary contributions on behalf of a participant as well as matching contributions. The Company did not make a matching contribution in 2022, compared to matching contributions of $274,000 in 2021 and $1.0 million in 2020. All participant contributions to the plan and any related earnings are immediately vested and may be withdrawn upon the participant's separation from service, death or disability or upon a date specified by the participant. Salary deferrals are recorded as salaries and employee benefits expense on the consolidated statements of income with an offsetting payable to participants in other liabilities on the consolidated balance sheets. The Company has an Employee Stock Purchase Plan (“ESPP”). Employees are eligible for the ESPP when they meet certain requirements concerning period of credited service and minimum hours worked. Eligible employees may contribute between 1% and 10% of eligible compensation up to the Section 423 of the Internal Revenue Code limit of $25,000. Employee contributions to the ESPP were temporarily suspended throughout 2020. On January 1, 2021, the suspension was removed and employee contributions commenced. In 2006, stockholders approved the ESPP, which allocated 400,000 shares for purchase. As of December 31, 2022, 2021 and 2020, 184,263, 164,033 and 155,933 shares, respectively, had been purchased on behalf of employees under the ESPP. The Company has stock-based compensation plans under which equity-based compensation grants are made by the board of directors, or its designated committee. Grants are subject to vesting requirements and may be settled in shares of common stock or paid in cash. Under the plans, the Company may grant, among other things, non-qualified stock options, incentive stock options, restricted stock, restricted stock units (“RSUs”), stock appreciation rights (“SARs”), performance awards or any combination thereof to employees and non-employee directors. A total of 1,400,000 shares are authorized for grant under the current plan. Total shares remaining available for grant under the current plan at December 31, 2022 were 1,143,773. A summary of the Company’s SAR activity and related information is as follows. Grants of SARs include time-based vesting conditions that generally vest ratably over a period of five years. December 31, 2022 December 31, 2021 December 31, 2020 SARs Weighted Average Exercise Price SARs Weighted Average Exercise Price SARs Weighted Average Exercise Price Outstanding at beginning of year 3,000 $ 44.20 12,400 $ 43.48 21,200 $ 33.95 Exercised (3,000) 44.20 (9,400) 43.24 (8,800) 20.52 Outstanding at year-end — $ — 3,000 $ 44.20 12,400 $ 43.48 Vested and exercisable at year-end — $ — 3,000 $ 44.20 12,400 $ 43.48 Weighted average remaining contractual life of vested (in years) 0.00 1.66 2.26 Weighted average remaining contractual life of outstanding (in years) 0.00 1.66 2.26 Compensation expense $ — $ — $ — Unrecognized compensation expense $ — $ — $ — Intrinsic value of exercised $ 64,000 $ 302,000 $ 294,000 A summary of the Company’s RSU activity and related information is as follows. Grants of RSUs include time-based vesting conditions that generally vest ratably over a period of three three December 31, 2022 December 31, 2021 December 31, 2020 RSUs Weighted RSUs Weighted RSUs Weighted Outstanding at beginning of year 1,206,862 $ 56.06 955,594 $ 48.76 558,312 $ 64.95 Granted 454,314 68.15 677,472 66.31 631,092 39.37 Vested (308,771) 54.51 (187,530) 58.82 (171,494) 65.17 Forfeited (196,753) 58.42 (238,674) 53.76 (62,316) 56.92 Outstanding at year-end 1,155,652 $ 61.12 1,206,862 $ 56.06 955,594 $ 48.76 Compensation expense $ 21,246,000 $ 30,060,000 $ 15,655,000 Unrecognized compensation expense $ 32,148,000 $ 32,525,000 $ 29,146,000 Weighted average years over which unrecognized compensation expense is expected to be recognized 2.31 2.79 2.83 The Company may make grants of restricted common stock to various non-employee directors as to which restrictions lapse ratably over a period of three years. No grants of restricted stock were made during 2022, 2021 or 2020 and no compensation expense was recorded during 2022, compared to compensation expense of $1,000 and $26,000 for the years ended December 31, 2021 and 2020, respectively. As of December 31, 2022, there were no remaining restrictions on any grants of restricted common stock. Total compensation cost for grants of stock-settled units was $21.2 million, $30.1 million and $15.7 million for the years ended December 31, 2022, 2021 and 2020, respectively.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income tax expense/(benefit) consists of the following: Year ended December 31, (in thousands) 2022 2021 2020 Current: Federal $ 109,370 $ 97,608 $ 32,701 State 7,302 6,761 920 Total 116,672 104,369 33,621 Deferred: Federal (16,178) (19,020) (7,964) State (1,217) (1,233) — Total (17,395) (20,253) (7,964) Total expense: Federal 93,192 78,588 24,737 State 6,085 5,528 920 Total $ 99,277 $ 84,116 $ 25,657 The reconciliation of income tax at the U.S. federal statutory tax rate to income tax expense and effective tax rate is as follows: Year ended December 31, 2022 2021 2020 (dollars in thousands) Amount Rate Amount Rate Amount Rate U.S. statutory rate $ 90,669 21 % $ 70,992 21 % $ 19,309 21 % State taxes 6,822 2 % 4,108 1 % 726 1 % Tax-exempt income (1,061) — % (1,855) (1) % (3,356) (4) % Tax credits (128) — % (179) — % (1,216) (1) % Disallowed FDIC 1,491 — % 2,936 1 % 3,920 4 % Disallowed compensation 2,771 1 % 6,377 2 % 3,098 3 % Other (1,287) (1) % 1,737 1 % 3,176 4 % Total $ 99,277 23 % $ 84,116 25 % $ 25,657 28 % At December 31, 2022, 2021 and 2020, the Company had unrecognized tax benefits of $889,000, $722,000 and $1.1 million, respectively. The Company is no longer subject to U.S. federal income tax examinations for years before 2019 or state and local income tax examinations for years before 2018. The table below summarizes significant components of deferred tax assets and liabilities utilizing the federal corporate income tax rate of 21%. Management believes it is more likely than not that all of the deferred tax assets will be realized. December 31, (in thousands) 2022 2021 Deferred tax assets: Allowance for credit losses $ 62,154 $ 51,738 Lease liabilities 24,091 15,615 Loan origination fees 14,385 11,204 Stock compensation 5,031 4,649 Non-accrual interest 1,132 1,874 Non-qualified deferred compensation 4,782 6,705 Net unrealized losses in AOCI 111,365 12,684 Other 4,678 1,671 Total deferred tax assets 227,618 106,140 Deferred tax liabilities: Loan origination costs (3,217) (3,110) Leases (12,863) (8,414) Lease ROU assets (19,807) (14,266) Depreciation (9,034) (10,567) Other (284) (3,446) Total deferred tax liabilities (45,205) (39,803) Net deferred tax asset $ 182,413 $ 66,337

Fair Value Disclosures

Fair Value Disclosures	12 Months Ended
	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Fair Value Disclosures	Fair Value Disclosures The Company determines the fair market values of its assets and liabilities measured at fair value on a recurring and nonrecurring basis using the fair value hierarchy as prescribed in ASC 820. See Note 1 - Operations and Summary of Significant Accounting Policies for information regarding the fair value hierarchy and a description of the methods and significant assumptions used by the Company in estimating its fair value disclosures for financial statements. Assets and liabilities measured at fair value are as follows: Fair Value Measurements Using (in thousands) Level 1 Level 2 Level 3 December 31, 2022 Available-for-sale debt securities:(1) U.S. Treasury securities $ 670,582 $ — $ — U.S. government agency securities — 102,154 — Residential mortgage-backed securities — 1,831,047 — CRT securities — — 11,861 Equity securities(1)(2) 22,879 11,077 — Derivative assets(4) — 13,504 — Derivative liabilities(4) — 91,758 — Non-qualified deferred compensation plan liabilities(5) 21,177 — — December 31, 2021 Available-for-sale debt securities:(1) U.S. government agency securities $ — $ 120,944 $ — Residential mortgage-backed securities — 3,225,378 — Tax-exempt asset-backed securities — — 180,033 CRT securities — — 11,846 Equity securities(1)(2) 33,589 12,018 — Mortgage loans held for sale(3) — 465 7,658 Derivative assets(4) — 37,788 — Derivative liabilities(4) — 37,788 — Non-qualified deferred compensation plan liabilities(5) 29,695 — — (1) Investment securities are measured at fair value on a recurring basis, generally monthly, except for tax-exempt asset-backed securities and CRT securities, which are measured quarterly. (2) Equity securities consist of investments that qualify for consideration under the regulations implementing the Community Reinvestment Act and investments related to non-qualified deferred compensation plan. (3) Mortgage loans held for sale measured at fair value on a recurring basis, generally monthly. (4) Derivative assets and liabilities are measured at fair value on a recurring basis, generally quarterly. (5) Non-qualified deferred compensation plan liabilities represent the fair value of the obligation to the employee, which generally corresponds to the fair value of the invested assets, and are measured at fair value on a recurring basis, generally monthly. Level 3 Valuations The following table presents a reconciliation of the level 3 fair value category measured at fair value on a recurring basis: Net Realized/Unrealized Gains (Losses) (in thousands) Balance at Beginning of Period Purchases / Additions Sales / Reductions Realized Unrealized Balance at End of Period Year Ended December 31, 2022 Available-for-sale debt securities:(1) Tax-exempt asset-backed securities $ 180,033 $ — $ (170,626) $ — $ (9,407) $ — CRT securities 11,846 — — — 15 11,861 Loans held for sale(2) 7,658 1,569 (8,132) (1,095) — — Year Ended December 31, 2021 Available-for-sale debt securities:(1) Tax-exempt asset-backed securities $ 199,176 $ — $ (14,314) $ — $ (4,829) $ 180,033 CRT securities 11,417 — — — 429 11,846 Loans held for sale(2) 6,933 2,125 (1,428) 5 23 7,658 (1) Unrealized gains/(losses) on available-for-sale debt securities are recorded in AOCI other non-interest income (2) Realized and unrealized gains/(losses) on loans held for sale are recorded in gain/(loss) on sale of loans held for sale Tax-exempt asset-backed securities The fair value of tax-exempt asset-backed securities is based on a discounted cash flow model, which utilizes Level 3, or unobservable, inputs, the most significant of which were a discount rate and weighted-average life. The securities were redeemed in full in the second quarter of 2022. At December 31, 2021, the combined weighted-average discount rate and weighted-average life utilized were 2.60% and 4.61 years, respectively. CRT securities The fair value of CRT securities is based on a discounted cash flow model, which utilizes Level 3, or unobservable, inputs, the most significant of which were a discount rate and weighted-average life. At December 31, 2022, the discount rates utilized ranged from 6.67% to 11.37% and the weighted-average life ranged from 5.06 years to 8.67 years. On a combined amortized cost weighted-average basis a discount rate of 8.24% and a weighted-average life of 6.26 years were utilized to determine the fair value of these securities at December 31, 2022. At December 31, 2021, the combined weighted-average discount rate and weighted-average life utilized were 4.97% and 6.35 years, respectively. Loans held for sale The fair value of mortgage loans held for sale using Level 3 inputs include loans that cannot be sold through normal sale channels and thus require significant management judgment or estimation when determining the fair value. The fair value of such loans is generally based upon quoted prices of comparable loans with a liquidity discount applied. There were no loans held for sale that were measured at fair value on a recurring basis at December 31, 2022. At December 31, 2021, the fair value of loans held for sale was calculated using a weighted-average discounted price of 97.8%. Fair Value of Financial Instruments A summary of the carrying amounts and estimated fair values of financial instruments is as follows: Carrying Estimated Fair Value (in thousands) Total Level 1 Level 2 Level 3 December 31, 2022 Financial assets: Cash and cash equivalents $ 5,012,260 $ 5,012,260 $ 5,012,260 $ — $ — Available-for-sale debt securities 2,615,644 2,615,644 670,582 1,933,201 11,861 Held-to-maturity debt securities 935,514 816,914 — 816,914 — Equity securities 33,956 33,956 22,879 11,077 — Loans held for sale 36,357 36,357 — — 36,357 Loans held for investment, net 19,033,871 18,969,922 — — 18,969,922 Derivative assets 13,504 13,504 — 13,504 — Financial liabilities: Total deposits 22,856,880 22,857,949 — — 22,857,949 Short-term borrowings 1,201,142 1,201,142 — 1,201,142 — Long-term debt 931,442 881,716 — 881,716 — Derivative liabilities 91,758 91,758 — 91,758 — December 31, 2021 Financial assets: Cash and cash equivalents $ 7,946,659 $ 7,946,659 $ 7,946,659 $ — $ — Available-for-sale debt securities 3,538,201 3,538,201 — 3,346,322 191,879 Equity securities 45,607 45,607 33,589 12,018 — Loans held for sale 8,123 8,123 — 465 7,658 Loans held for investment, net 22,595,088 22,631,252 — — 22,631,252 Derivative assets 37,788 37,788 — 37,788 — Financial liabilities: Total deposits 28,109,365 28,109,762 — — 28,109,762 Short-term borrowings 2,202,832 2,202,832 — 2,202,832 — Long-term debt 928,738 952,404 — 952,404 — Derivative liabilities 37,788 37,788 — 37,788 —

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments The notional amounts and estimated fair values of derivative positions outstanding are presented in the following table. December 31, 2022 December 31, 2021 Estimated Fair Value Estimated Fair Value (in thousands) Notional Asset Derivative Liability Derivative Notional Asset Derivative Liability Derivative Derivatives designated as hedges Cash flow hedges: Interest rate contracts: Swaps hedging loans $ 3,000,000 $ — $ 86,378 $ — $ — $ — Non-hedging derivatives Customer-initiated and other derivatives: Interest rate contracts: Swaps 4,396,367 83,529 83,529 3,536,090 40,922 40,922 Caps and floors written 220,142 — 2,583 191,291 94 — Caps and floors purchased 220,142 2,583 — 191,291 — 94 Forward contracts 1,569,326 4,431 4,053 — — — Gross derivatives 90,543 176,543 41,016 41,016 Netting adjustment - offsetting derivative assets/liabilities (5,164) (5,164) (3,228) (3,228) Netting adjustment - cash collateral received/posted (71,875) (79,621) — — Net derivatives included on the consolidated balance sheets $ 13,504 $ 91,758 $ 37,788 $ 37,788 The Company’s credit exposure on derivative instruments is limited to the net favorable value and interest payments by each counterparty. In some cases collateral may be required from the counterparties involved if the net value of the derivative instruments exceeds a nominal amount. The Company’s credit exposure associated with these instruments, net of any collateral pledged, was approximately $13.5 million at December 31, 2022 and approximately $37.8 million at December 31, 2021. Collateral levels are monitored and adjusted on a regular basis for changes in the value of derivative instruments. At December 31, 2022, the Company had $89.2 million in cash collateral pledged to counterparties included in interest bearing cash and cash equivalents on the consolidated balance sheet and $72.5 million in cash collateral received from counterparties included in interest bearing deposits on the consolidated balance sheet. The comparative amounts at December 31, 2021, were $40.3 million in cash collateral pledged to counterparties and no cash collateral received from counterparties. The Company also enters into credit risk participation agreements with financial institution counterparties for interest rate swaps related to loans in which the Company is either a participant or a lead bank. The risk participation agreements entered into by the Company as a participant bank provide credit protection to the financial institution counterparty should the borrower fail to perform on its interest rate derivative contract with that financial institution. The Company is party to 19 risk participation agreements where it acts as a participant bank with a notional amount of $291.2 million at December 31, 2022, compared to seven risk participation agreements with a notional amount of $79.2 million at December 31, 2021. The maximum estimated exposure to these agreements, assuming 100% default by all obligors, was approximately $8.9 million at December 31, 2022 and $2.3 million at December 31, 2021. The fair value of these exposures was insignificant to the consolidated financial statements at both December 31, 2022 and December 31, 2021. Risk participation agreements entered into by the Company as the lead bank provide credit protection should the borrower fail to perform on its interest rate derivative contract. The Company is party to 18 risk participation agreements where the Company acts as the lead bank having a notional amount of $222.0 million at December 31, 2022, compared to 15 agreements having a notional amount of $156.1 million at December 31, 2021. Derivatives Designated as Cash Flow Hedges During 2022, the Company entered into interest rate derivative contracts that were designated as qualifying cash flow hedges to hedge the exposure to variability in expected future cash flows attributable to changes in a contractually specified interest rate. During 2022, the Company recorded $85.8 million in unrealized losses to adjust its cash flow hedges to fair value, which was recorded net of tax to AOCI, and reclassified $1.8 million from AOCI into interest income on loans. Based on current market conditions, the Company estimates that during the next 12 months, an additional $50.9 million will be reclassified from AOCI as a decrease to interest income. As of December 31, 2022, the maximum length of time over which forecasted transactions are hedged is 3.75 years.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2022
Equity [Abstract]
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income The following table provides the change in AOCI by component: (in thousands) Cash Flow Hedges Available-for-Sale Securities Held-to-Maturity Securities Total Year Ended December 31, 2022 Beginning balance $ — $ (47,715) $ — $ (47,715) Change in unrealized gain/(loss) (85,846) (324,803) (69,165) (479,814) Amounts reclassified into net income 1,803 — 8,102 9,905 Total other comprehensive income/(loss) (84,043) (324,803) (61,063) (469,909) Income tax expense/(benefit) (17,649) (68,209) (12,823) (98,681) Total other comprehensive income/(loss), net of tax (66,394) (256,594) (48,240) (371,228) Ending balance $ (66,394) $ (304,309) $ (48,240) $ (418,943) Year Ended December 31, 2021 Beginning balance $ — $ 15,774 $ — $ 15,774 Change in unrealized gain/(loss) — (80,366) — (80,366) Amounts reclassified into net income — — — — Total other comprehensive income/(loss) — (80,366) — (80,366) Income tax expense/(benefit) — (16,877) — (16,877) Total other comprehensive income/(loss), net of tax — (63,489) — (63,489) Ending balance $ — $ (47,715) $ — $ (47,715)

Parent Company Only

Parent Company Only	12 Months Ended
	Dec. 31, 2022
Condensed Financial Information Disclosure [Abstract]
Parent Company Only	Parent Company Only Summarized financial information for Texas Capital Bancshares, Inc. are as follows: Balance Sheet December 31, (in thousands) 2022 2021 Assets Cash and cash equivalents $ 245,777 $ 438,761 Investment in subsidiaries 3,183,767 3,155,954 Other assets 93,395 91,301 Total assets $ 3,522,939 $ 3,686,016 Liabilities and Stockholders’ Equity Liabilities: Other liabilities $ 6,754 $ 3,668 Long-term debt 484,754 484,316 Total liabilities 491,508 487,984 Stockholders’ Equity: Preferred stock 300,000 300,000 Common stock 509 506 Additional paid-in capital 1,025,593 1,018,711 Retained earnings 2,239,582 1,926,538 Treasury stock (115,310) (8) Accumulated other comprehensive income/(loss) (418,943) (47,715) Total stockholders’ equity 3,031,431 3,198,032 Total liabilities and stockholders’ equity $ 3,522,939 $ 3,686,016 Statement of Income Year ended December 31, (in thousands) 2022 2021 2020 Interest on notes receivable $ 3,250 $ 3,404 $ 3,402 Dividend income 10,529 10,472 10,496 Other income 9 5 3 Total income 13,788 13,881 13,901 Interest expense 19,721 15,946 10,515 Salaries and employee benefits 782 720 725 Legal and professional 1,583 1,803 3,238 Other non-interest expense 1,636 4,375 4,553 Total expense 23,722 22,844 19,031 Loss before income taxes and equity in undistributed income of subsidiary (9,934) (8,963) (5,130) Income tax benefit (2,282) (2,179) (1,135) Loss before equity in undistributed income of subsidiary (7,652) (6,784) (3,995) Equity in undistributed income of subsidiary 337,946 258,539 68,100 Net income 330,294 251,755 64,105 Preferred stock dividends 17,250 18,721 9,750 Net income available to common stockholders $ 313,044 $ 233,034 $ 54,355 Statements of Cash Flows Year ended December 31, (in thousands) 2022 2021 2020 Operating Activities Net income $ 330,294 $ 251,755 $ 64,105 Adjustments to reconcile net income to net cash provided by/(used in) operating activities: Equity in undistributed income of subsidiary (337,946) (258,539) (68,100) Amortization expense 438 2,469 101 Changes in operating assets and liabilities: Accrued interest receivable and other assets (2,095) (1,750) (912) Accrued interest payable and other liabilities 3,086 2,348 (448) Net cash used in operating activities (6,223) (3,717) (5,254) Investing Activities Net decrease in loans held for investment — 7,500 3,000 Investments in and advances to subsidiaries (50,000) — — Net cash provided by/(used in) investing activities (50,000) 7,500 3,000 Financing Activities Issuance of stock related to stock-based awards (4,209) (3,121) (1,986) Net proceeds from issuance of preferred stock — 289,723 — Redemption of preferred stock — (150,000) — Preferred stock dividends paid (17,250) (18,721) (9,750) Repurchase of common stock (115,302) — — Redemption of long-term debt — (111,000) — Net proceeds from Issuance of long-term debt — 370,625 — Net cash provided by/(used in) financing activities (136,761) 377,506 (11,736) Net increase/(decrease) in cash and cash equivalents (192,984) 381,289 (13,990) Cash and cash equivalents at beginning of year 438,761 57,472 71,462 Cash and cash equivalents at end of year $ 245,777 $ 438,761 $ 57,472

Material Transactions Affecting

Material Transactions Affecting Stockholders' Equity	12 Months Ended
	Dec. 31, 2022
Stockholders' Equity Note [Abstract]
Material Transactions Affecting Stockholders' Equity	Material Transactions Affecting Stockholders' Equity On April 19, 2022, the Company’s board of directors authorized the Company to repurchase up to $150.0 million in shares of its outstanding common stock. During the year ended December 31, 2022, the Company repurchased 2,083,118 shares of its common stock for an aggregate price of $115.3 million, at a weighted average price of $55.35 per share. On January 18, 2023, the Company’s board of directors authorized a new share repurchase program under which the Company may repurchase up to $150.0 million in shares of its outstanding common stock. On March 3, 2021, the Company completed an issuance of 5.75% fixed rate non-cumulative perpetual preferred stock, Series B, with a liquidation preference of $1,000 per share (equivalent to $25 per depositary share) (the “Series B Preferred Stock”) and an issuance and sale of 12,000,000 depositary shares, each representing a 1/40th interest in a share of the Series B Preferred Stock. Dividends on the Series B Preferred Stock are not cumulative and will be paid when declared by the board of directors to the extent that the Company has legally available funds to pay dividends. If declared, dividends will accrue and be payable quarterly, in arrears, on the liquidation preference amount, on a non-cumulative basis, at a rate of 5.75% per annum. Holders of preferred stock will not have voting rights, except with respect to certain changes in the terms of the preferred stock, certain dividend non-payments and as otherwise required by applicable law. Net proceeds from the sale totaled $289.7 million, providing additional capital to be used for general corporate purposes. A portion of the proceeds were also used to redeem, in whole, the 6.50% non-cumulative perpetual preferred stock Series A, par value $0.01 per share, in accordance with its terms. The redemption of the Series A preferred stock occurred on June 15, 2021.

Quarterly Financial Data

Quarterly Financial Data	12 Months Ended
	Dec. 31, 2022
Selected Quarterly Financial Information [Abstract]
Quarterly Financial Information	Quarterly Financial Data (unaudited) The tables below summarize quarterly financial information: 2022 Selected Quarterly Financial Data (in thousands except per share data) Fourth Third Second First Interest income $ 371,287 $ 322,071 $ 242,349 $ 208,530 Interest expense 123,687 82,991 36,818 24,983 Net interest income 247,600 239,080 205,531 183,547 Provision for credit losses 34,000 12,000 22,000 (2,000) Net interest income after provision for credit losses 213,600 227,080 183,531 185,547 Non-interest income 277,672 25,333 26,242 20,282 Non-interest expense 213,090 197,047 164,303 153,092 Income before income taxes 278,182 55,366 45,470 52,737 Income tax expense 60,931 13,948 11,311 13,087 Net income 217,251 41,418 34,159 39,650 Preferred stock dividends 4,312 4,313 4,312 4,313 Net income available to common stockholders $ 212,939 $ 37,105 $ 29,847 $ 35,337 Basic earnings per share $ 4.28 $ 0.74 $ 0.59 $ 0.70 Diluted earnings per share $ 4.23 $ 0.74 $ 0.59 $ 0.69 2021 Selected Quarterly Financial Data (in thousands except per share data) Fourth Third Second First Interest income $ 219,892 $ 216,589 $ 216,953 $ 223,151 Interest expense 25,860 26,053 27,496 28,339 Net interest income 194,032 190,536 189,457 194,812 Provision for credit losses (10,000) 5,000 (19,000) (6,000) Net interest income after provision for credit losses 204,032 185,536 208,457 200,812 Non-interest income 31,459 24,779 37,639 44,353 Non-interest expense 146,649 152,987 149,060 150,316 Income before income taxes 88,842 57,328 97,036 94,849 Income tax expense 23,712 13,938 23,555 22,911 Net income 65,130 43,390 73,481 71,938 Preferred stock dividends 4,313 4,312 6,317 3,779 Net income available to common stockholders $ 60,817 $ 39,078 $ 67,164 $ 68,159 Basic earnings per share $ 1.20 $ 0.76 $ 1.31 $ 1.33 Diluted earnings per share $ 1.19 $ 0.76 $ 1.31 $ 1.33

New Accounting Standards

New Accounting Standards	12 Months Ended
	Dec. 31, 2022
Accounting Standards Update and Change in Accounting Principle [Abstract]
New Accounting Standards	New Accounting Standards ASU 2022-02, “Financial Instruments - Credit Losses (Topic 326)” (“ASU 2022-02”) eliminates the guidance on troubled debt restructurings and requires entities to evaluate all loan modifications to determine if they result in a new loan or a continuation of the existing loan. ASU 2022-02 also requires that entities disclose current-period gross charge-offs by year of origination for loans and leases. ASU 2022-02 is effective January 1, 2023 and is not expected to have a significant impact on the Company’s financial statements. Accounting Standard Update 2022-04, “Liabilities - Supplier Finance Programs (Subtopic 405-50)” (“ASU 2022-04”) enhances the transparency of supplier finance programs and the related financial statement disclosures. The amendments require that a buyer in a supplier finance program disclose information about the key terms of the program, outstanding confirmed amounts as of the end of the period, a rollforward of such amounts during each annual period and a description of where in the financial statements outstanding amounts are presented. ASU 2022-04 is effective January 1, 2023, except for the disclosure of rollforward information, which is effective January 1, 2024, and is not expected to have an impact on the Company’s consolidated financial statements. ASU 2022-06, “Reference Rate Reform (Topic 848)” (“ASU 2022-06”) provides optional guidance to ease the potential burden in account for (or recognizing the effects of) reference rate reform on financial reporting. The objective of the guidance is to provide temporary relief during the transition period away from LIBOR toward new interest rate benchmarks. The amendments in ASU 2022-06 defer the sunset date provision from December 31, 2022 to December 31, 2024. ASU 2022-06 was effective immediately upon issuance and is not expected to have an impact on the Company’s financial statements or disclosures.

Operations and Summary of Sig_2

Operations and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Nature of Business	Organization and Nature of Business Texas Capital Bancshares, Inc. (“TCBI” or the “Company”), a Delaware corporation, was incorporated in November 1996 and commenced banking operations in December 1998. The consolidated financial statements include the accounts of TCBI and its wholly owned subsidiary, Texas Capital Bank (the “Bank”). The Company serves the needs of commercial businesses, entrepreneurs and professionals located in Texas through a custom array of financial products and services with high-quality personal service. On September 6, 2022, the Company announced the sale of BankDirect Capital Finance, LLC (“BDCF”), its insurance premium finance subsidiary, to AFCO Credit Corporation, an indirect wholly-owned subsidiary of Truist Financial Corporation. The sale of BDCF included its business operations and loan portfolio of approximately $3.1 billion. The sale was an all-cash transaction for a purchase price of $3.4 billion, representing a pre-tax gain of $248.5 million. This transaction did not meet the criteria for discontinued operations reporting, and the sale was completed on November 1, 2022.
Basis of Presentation	Basis of Presentation The Company’s accounting and reporting policies conform to accounting principles generally accepted in the United States (“GAAP”) and to generally accepted practices within the banking industry. Certain prior period balances have been reclassified to conform to the current period presentation.
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. Actual results could differ from those estimates. The allowance for credit losses, the fair value of financial instruments and the status of contingencies are particularly susceptible to significant change.
Basic and Diluted Earnings Per Common Share	Basic and Diluted Earnings Per Common Share Basic earnings per common share is based on net income available to common stockholders divided by the weighted-average number of common shares outstanding during the period excluding non-vested stock-settled awards. Diluted earnings per common share include the dilutive effect of non-vested stock-settled awards granted using the treasury stock method.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash equivalents include amounts due from banks, interest bearing deposits in other banks and federal funds sold.
Investment Securities	Investment Securities Investment securities include debt securities and equity securities. Debt Securities Debt securities are classified as trading, available-for-sale or held-to-maturity. Debt securities not classified as held-to-maturity or trading are classified as available-for-sale. Management classifies securities at the time of purchase and re-assesses such designation at each balance sheet date. The amortized cost of debt securities is adjusted for amortization of premiums and accretion of discounts to maturity, or in the case of mortgage-backed securities, over the estimated life of the security. Such amortization and accretion are included in interest income from investment securities. Gains or losses realized upon the sale of debt securities is recorded in other non-interest income on the consolidated statements of income and other comprehensive income. The cost of securities sold is based on the specific identification method. The Company has made a policy election to exclude accrued interest from the amortized cost basis of debt securities and report accrued interest separately in accrued interest and other assets on the consolidated balance sheets. Available-for-sale and held-to-maturity debt securities are placed on non-accrual status when management no longer expects to receive all contractual amounts due, which is generally at 90 days past due. Accrued interest receivable is reversed against interest income when a security is placed on non-accrual status. Accordingly, the Company does not recognize an allowance for credit loss against accrued interest receivable Trading Account Debt securities acquired for resale in anticipation of short-term market movements are classified as trading and recorded at fair value, with realized and unrealized gains and losses recognized in income. Held-to-Maturity Debt securities are classified as held-to-maturity when the Company has the positive intent and ability to hold the securities to maturity. Held-to-maturity securities are stated at amortized cost, net of any allowance for credit losses. Management may transfer debt securities classified as available-for-sale to held-to-maturity when upon reassessment it is determined that the Company has both the positive intent and ability to hold these securities to maturity. The debt securities are transferred at fair value resulting in a premium or discount recorded on transfer date. Unrealized gains or losses at the date of transfer continue to be reported as a separate component of accumulated other comprehensive income/loss, net (“AOCI”). The premium or discount and the unrealized gain or loss, net of tax, in AOCI will be amortized to interest income over the remaining life of the securities using the interest method. Available-for-Sale Available-for-sale debt securities are recorded at fair value, with unrealized gains and losses, net of tax, reported as a separate component of AOCI. For available-for-sale debt securities in an unrealized loss position, the Company first assesses whether it intends to sell, or it is more-likely-than-not that it will be required to sell, the securities before recovery of the amortized cost basis. If either of these criteria is met, the securities’ amortized cost basis is written down to fair value as a current period expense recorded on the consolidated statements of income and other comprehensive income. If either of the above criteria is not met, management evaluates whether the decline in fair value is the result of credit losses or other factors. In making this assessment, management may consider various factors including the extent to which fair value is less than amortized cost, performance of any underlying collateral and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected are compared to the amortized cost basis of the security and any excess is recorded as an allowance for credit losses, limited to the amount by which the fair value is less than the amortized cost basis. Any impairment not recorded through an allowance for credit losses is recognized in AOCI, net of tax, as a non-credit related impairment. Included in debt securities available-for-sale are credit risk transfer (“CRT”) securities, which represent unsecured obligations issued by government sponsored entities (“GSEs”) such as Freddie Mac and are designed to transfer mortgage credit risk from the GSE to private investors. CRT securities are structured to be subject to the performance of a reference pool of mortgage loans in which the Company shares in 50% of the first losses with the GSE. If the reference pool incurs losses, the amount the Company will recover on the notes is reduced by its share of the amount of such losses, which could potentially be up to 100% of the amount outstanding. Unrealized losses recognized in AOCI for the CRT securities are primarily related to the difference between the current market rate for similar securities and the stated interest rate and are not considered to be related to credit loss events. The CRT securities are generally interest-only for an initial period of time and may be restricted from being transferred until a future date. Equity Securities Equity securities with readily determinable fair values are stated at fair value with realized and unrealized gains and losses reported in income. Equity securities without readily determinable fair values are recorded at cost less any impairment.
Loans	Loans Loans Held for Sale The Company transitioned its mortgage correspondent aggregation (“MCA”) program to a third party in 2021. Prior to transition, the Company committed to purchase residential mortgage loans from independent correspondent lenders and delivered those loans into the secondary market via whole loan sales to independent third parties or in securitization transactions to third parties such as Ginnie Mae or to GSEs. In some cases, the Company retained the mortgage servicing rights. Once purchased, these loans were classified as held for sale and carried at fair value pursuant to the election of the fair value option in accordance with Accounting Standards Codification (“ASC”) 825, Financial Instruments . At the commitment date, the Company entered into a corresponding forward sale commitment with a third party, typically Ginnie Mae or a GSE, to deliver the loans within a specified timeframe. The estimated gain/(loss) for the entire transaction (from initial purchase commitment to final delivery of loans) was recorded as an asset or liability. The fair value of loans held for sale is derived from observable current market prices, when available, and includes the fair value of the mortgage servicing rights. Adjustments to reflect unrealized gains and losses resulting from changes in fair value and realized gains and losses upon ultimate sale of the loans are classified as gain/(loss) on sale of loans held for sale on the consolidated statements of income and other comprehensive income. Residential mortgage loans held for sale are subject to both credit and interest rate risk. Credit risk is managed through underwriting policies and procedures, including collateral requirements, which are generally accepted by the secondary loan markets. Exposure to interest rate fluctuations is partially managed through forward sales contracts, which set the price for loans that will be delivered in the next 60 to 90 days. From time to time the Company holds for sale certain commercial loans and also the guaranteed portion of Small Business Administration 7(a) loans, which are carried at lower of cost or fair value. Loans Held for Investment Loans held for investment (including financing leases) are stated at the amount of unpaid principal reduced by unearned income, net of direct loan origination costs. Interest on loans is recognized using the simple interest method on the daily balances of the principal amounts outstanding. Loan origination fees, net of direct loan origination costs, and commitment fees are deferred and amortized as an adjustment to yield over the life of the loan, or over the commitment period, as applicable. Restructured loans are loans on which, due to the borrower’s financial difficulties, the Company has granted a concession that it would not otherwise consider for borrowers of similar credit quality. This may include a transfer of real estate or other assets from the borrower, a modification of loan terms, or a combination of the two. Modifications of terms that could potentially qualify as a restructuring include reduction of contractual interest rate, extension of the maturity date at a contractual interest rate lower than the current rate for new debt with similar risk, an adjustment to payment terms, a reduction of the face amount of debt or forgiveness of either principal or accrued interest. A loan continues to qualify as restructured until a consistent payment history or change in the borrower’s financial condition has been evidenced, generally for no less than twelve months. If the restructuring agreement specifies an interest rate at the time of the restructuring that is greater than or equal to the rate that the Company is willing to accept for a new extension of credit with comparable risk, then the loan is no longer considered a restructuring if it is in compliance with the modified terms in calendar years after the year of the restructure. A loan is considered past due when a contractually due payment has not been received by the contractual due date. The Company places a loan on non-accrual when there is a clear indication that the borrower’s cash flow may not be sufficient to meet payments as they become due, which is generally when a loan is 90 days past due. When a loan is placed on non-accrual status, all previously accrued and unpaid interest is reversed as a reduction of current period interest income. Interest income is subsequently recognized on a cash basis as long as the remaining book balance of the asset is deemed to be collectible. If collectability is questionable, then cash payments are applied to principal. A loan is placed back on accrual status when both principal and interest are current and it is probable that all amounts due will be collected (both principal and interest) according to the terms of the loan agreement. Loans held for investment includes legal ownership interests in mortgage loans that the Company purchases through its mortgage finance division. The ownership interests are purchased from unaffiliated mortgage originators who are seeking additional liquidity to facilitate their ability to originate loans. The mortgage originator has no obligation to offer and the Company has no obligation to purchase these interests. The originator closes mortgage loans consistent with underwriting standards established by approved investors, and, at the time of the sale to the investor, the Company’s ownership interest and that of the originator are delivered to the investor selected by the originator and approved. The Company typically purchases up to a 99% ownership interest in each mortgage with the originator owning the remaining percentage. These mortgage ownership interests are generally held for a period of less than 30 days and more typically 10-20 days. Because of conditions in agreements with originators designed to reduce transaction risks, under ASC 860, Transfers and Servicing of Financial Assets (“ASC 860”), the ownership interests do not qualify as participating interests. Under ASC 860, the ownership interests are deemed to be loans to the originators and payments received from investors are deemed to be payments made by or on behalf of the originator to repay the loan. Because the Company has an actual, legal ownership interest in the underlying residential mortgage loan, these interests are reported as extensions of credit to the originators that are secured by the mortgage loans as collateral. Due to market conditions or events of default by the investor or the originator, the Company could be required to purchase the remaining interests in the mortgage loans and hold them beyond the expected 10-20 days. Mortgage loans acquired under these conditions would require mark-to-market adjustments to income and could require further allocations of the allowance for credit losses or be subject to charge-off in the event the loans become impaired.
Allowance for Credit Losses	Allowance for Credit Losses On January 1, 2020, the Company adopted ASU 2016-13 "Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments" ("ASU 2016-13"), which uses the current expected credit loss ("CECL") model to determine the allowance for credit losses. The measurement of expected credit losses under the CECL methodology is applicable to financial assets measured at amortized cost, including loan receivables and held-to-maturity debt securities. It also applies to off-balance sheet credit exposures not accounted for as insurance (loan commitments, standby letters of credit, financial guarantees, and other similar instruments) and net investments in leases recognized by a lessor in accordance with ASU 2016-02 "Leases (Topic 842)" . The following is discussion of the allowance for credit losses on loans held for investment. See “ Investment Securities - Debt Securities ” above for discussion of the allowance for credit losses on available-for-sale and held-to maturity debt securities. The CECL methodology recognizes lifetime expected credit losses immediately when a financial asset is originated or purchased. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of loans to present the net amount expected to be collected on the loans. Loans, or portions thereof, are charged off against the allowance when they are deemed uncollectible. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. Management estimates the allowance balance using relevant available information, from internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. Historical credit loss experience provides the basis for the estimation of expected credit losses. Adjustments to historical loss information are made for differences in current loan-specific risk characteristics such as differences in underwriting standards, portfolio mix, credit quality, or term, as well as for changes in macroeconomic conditions, such as changes in unemployment rates, crude oil prices, property values or other relevant factors. The allowance for credit losses is comprised of reserves measured on a collective (pool) basis based on a lifetime loss-rate model when similar risk characteristics exist. Reserves on loans that do not share risk characteristics are evaluated on an individual basis. In order to determine the allowance for credit losses, all loans are assigned a credit grade. Loans graded substandard or worse and greater than $500,000 are specifically reviewed for loss potential and when deemed appropriate are assigned a reserve based on an individual evaluation. For purposes of determining the pool-basis reserve, the remainder of the portfolio, representing all loans not assigned an individual reserve, is segregated first by portfolio segment, then by product type, to recognize differing risk profiles within portfolio segments, and finally by credit grade. Each credit grade within each product type is assigned a historical loss rate. These historical loss rates are then modified to incorporate a reasonable and supportable forecast of future losses at the portfolio segment level, as well as any necessary qualitative adjustments using a Portfolio Level Qualitative Factor (“PLQF”) and/or a Portfolio Segment Level Qualitative Factor (“SLQF”). These modified historical loss rates are multiplied by the outstanding principal balance of each loan to calculate a required reserve. A similar process is employed to calculate a reserve assigned to off-balance sheet commitments, specifically unfunded loan commitments and letters of credit, and any needed reserve is recorded in other liabilities on the consolidated balance sheets. The PLQF and SLQF are utilized to address factors that are not present in historical loss rates and are otherwise unaccounted for in the quantitative process. The PLQF is used to apply a qualitative adjustment across the entire portfolio of loans, while the SLQF is designed to apply a qualitative adjustment across a single portfolio segment. Even though portions of the allowance may be allocated to specific loans, the entire allowance is available for any credit that, in management’s judgment, should be charged off. The Company generally uses a two-year forecast period, based on a single forecast scenario or a blend of multiple forecast scenarios, using variables management believes are most relevant to each portfolio segment. For periods beyond which management is able to develop reasonable and supportable forecasts, they immediately revert to the average historical loss rate. The forecast period and scenario(s) used are reviewed on a quarterly basis and may be adjusted based on management's view of the current economic conditions and level of predictability the forecast can provide. Portfolio segments are used to pool loans with similar risk characteristics and align with the Company’s methodology for measuring expected credit losses. A summary of the primary portfolio segments is as follows: Commercial . The commercial loan portfolio is comprised of lines of credit for working capital, term loans and leases to finance equipment and other business assets across a variety of industries. These loans are used for general corporate purposes including financing working capital, internal growth, acquisitions and business insurance premiums and are generally secured by accounts receivable, inventory, equipment and other assets of clients’ businesses. The commercial loan portfolio also includes consumer loans because the Company’s small portfolio of consumer loans is largely comprised of accommodation loans to individuals associated with its commercial clients. Energy . The energy loan portfolio is primarily comprised of loans to exploration and production companies that are generally collateralized with proven reserves based on appropriate valuation standards that take into account the risk of oil and gas price volatility. The majority of this portfolio is first lien, senior secured, reserve-based lending, which the Company believes is the lowest-risk form of energy lending. Energy loans are impacted by commodity price volatility, as well as changes in consumer and business demand. Mortgage finance . Mortgage finance loans relate to mortgage warehouse lending operations in which the Company purchases mortgage loan ownership interests from unaffiliated mortgage originators that are generally held for a period of less than 30 days and more typically 10-20 days before they are sold to an approved investor. Volumes fluctuate based on the level of market demand for the product and the number of days between purchase and sale of the loans, which can be affected by changes in overall market interest rates and housing demand and tend to peak at the end of each month. Mortgage finance loans are consistently underwritten based on standards established by the approved investors. Market conditions or events of default by an investor or originator could require that the Company repurchases the remaining interests in the mortgage loans and hold them beyond the expected 10-20 days. Real estate . The real estate portfolio is comprised of the following types of loans: Commercial real estate (“CRE”) . The CRE portfolio is comprised of both construction/development financing and limited term financing provided to professional real estate developers and owners/managers of commercial real estate projects and properties who have a demonstrated record of past success with similar properties. Collateral properties include office buildings, warehouse/distribution buildings, shopping centers, hotels/motels, senior living, apartment buildings and residential and commercial tract development. The primary source of repayment on these loans is expected to come from the sale, permanent financing or lease of the real property collateral. CRE loans are impacted by fluctuations in collateral values, as well as the ability of the borrower to obtain permanent financing. Residential homebuilder finance (“RBF”) . The RBF portfolio is comprised of loans made to residential builders and developers. Loans to residential builders are typically in the form of uncommitted guidance lines and are for the purpose of developing lots into single-family homes, while loans to developers are typically in the form of borrowing base lines extended for the purpose of acquiring and developing raw land into lots that can be further sold to home builders. RBF loans, if not structured and monitored correctly, can be impacted by volatility in consumer demand, as well as fluctuation in housing prices. Secured by 1-4 family . This category of loans includes both first and second lien loans made for the purpose of purchasing or constructing 1-4 family residential dwellings, as well as home equity revolving lines of credit and loans to purchase lots for future construction of 1-4 family residential dwellings. Other . The “other” category is primarily comprised of real estate loans originated through a Small Business Administration (SBA) program where repayment is partially guaranteed by the SBA, as well as other loans secured by real estate where the primary source of repayment is not expected to come from the sale or lease of the real property collateral. The Company has several pass credit grades that are assigned to loans based on varying levels of risk, ranging from credits that are secured by cash or marketable securities, to watch credits which have all the characteristics of an acceptable credit risk but warrant more than the normal level of monitoring. Within the criticized/classified credit grades are special mention, substandard and doubtful. Special mention loans are those that are currently protected by the sound worth and paying capacity of the borrower, but that are potentially weak and constitute an additional credit risk. These loans have the potential to deteriorate to a substandard grade due to the existence of financial or administrative deficiencies. Substandard loans have a well-defined weakness or weaknesses that jeopardizes the liquidation of the debt. They are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Some substandard loans are inadequately protected by the sound worth and paying capacity of the borrower and of the collateral pledged and may be considered impaired. Substandard loans can be accruing or can be on non-accrual depending on the circumstances of the individual loans. Loans classified as doubtful have all the weaknesses inherent in substandard loans with the added characteristics that the weaknesses make collection in full highly questionable and improbable. The possibility of loss is extremely high. All doubtful loans are on non-accrual. The methodology used in the estimation of the allowance, which is performed at least quarterly, is designed to be dynamic and responsive to changes in portfolio credit quality and forecasted economic conditions. Changes are reflected in the pool-basis allowance and in reserves assigned on an individual basis as the collectability of classified loans is evaluated with new information. As the Company’s portfolio has matured, historical loss ratios have been closely monitored. The review of the appropriateness of the allowance is performed by executive management and presented to the audit and risk committees of the board of directors for their review. The committees report to the board as part of the board's quarterly review of the Company’s consolidated financial statements. When management determines that foreclosure is probable, and for certain collateral-dependent loans where foreclosure is not considered probable, expected credit losses are based on the estimated fair value of the collateral adjusted for selling costs, when appropriate. A loan is considered collateral-dependent when the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the operation or sale of the collateral. Expected credit losses are estimated over the contractual term of the loans, adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals and modifications unless either of the following applies: management has a reasonable expectation that a loan will be restructured or the extension or renewal options are included in the borrower contract and are not unconditionally cancellable. The Company does not measure an allowance for credit losses on accrued interest receivable balances because these balances are written off in a timely manner as a reduction to interest income when loans are placed on non-accrual status as discussed above.
Other Real Estate Owned	Other Real Estate Owned Other real estate owned (“OREO”), which is included in other assets on the consolidated balance sheet, consists of real estate that has been foreclosed. When foreclosure occurs, the acquired asset is recorded at fair value less selling costs, generally based on appraised value, which may result in partial charge-off of the loan through a charge to the allowance for credit losses, if necessary. Subsequent write-downs required for declines in value are recorded through a valuation allowance, or taken directly
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets, Net Intangible assets are acquired assets that lack physical substance but can be distinguished from goodwill because of contractual or other legal rights or because the asset is capable of being sold or exchanged either on its own or in combination with a related contract, asset or liability. The Company’s goodwill and intangible assets relate primarily to customer relationships purchased as part of business acquisitions. Intangible assets with definite useful lives are amortized over their estimated life. Goodwill and intangible assets are tested for impairment at least annually or whenever changes in circumstances indicate the carrying amount of the assets may not be recoverable from future undiscounted cash flows. If impaired, the assets are recorded at fair value.
Premises and Equipment, Net	Premises and Equipment, Net Premises and equipment are stated at cost less accumulated depreciation and amortization. Depreciation is computed using the straight-line method over the estimated useful lives of the assets. Furniture and equipment is generally depreciated over three
Software	Software Costs incurred in connection with development or purchase of internal use software and cloud computing arrangements, including in-substance software licenses, are capitalized. Amortization is computed on a straight-line basis over the estimated useful life of the asset, which generally ranges from one
Financial Instruments with Off-Balance Sheet Risk	Financial Instruments with Off-Balance Sheet Risk The Company has undertaken certain guarantee obligations in the ordinary course of business which include liabilities with off-balance sheet risk. The Company considers the following arrangements to be guarantees: commitments to extend credit, standby letters of credit and indemnification agreements included within third party contractual arrangements. The Company is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit that involve varying degrees of credit risk in excess of the amount recognized on the consolidated balance sheets. The Company’s exposure to credit loss in the event of non-performance by the other party to these financial instruments is represented by the contractual amount of the instruments. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. The amount of collateral obtained, if deemed necessary, is based on management’s credit evaluation of the borrower. 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. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. Commitments to extend credit do not include mortgage finance arrangements with mortgage loan originators through the mortgage warehouse lending division, which are established as uncommitted “guidance” purchase and sale facilities under which the mortgage originator has no obligation to offer and the Company has no obligation to purchase interests in the mortgage loans subject to the arrangements. Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. Those guarantees are primarily issued to support public and private borrowing arrangements. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. In conjunction with the sale and securitization of loans held for sale and their related servicing rights, the Company may be exposed to liability resulting from recourse, repurchase and make-whole agreements. If it is determined subsequent to the sale of a loan or its related servicing rights that a breach of the representations or warranties made in the applicable sale agreement has occurred, which may include guarantees that prepayments will not occur within a specified and customary time frame, the Company may have an obligation to either (a) repurchase the loan for the unpaid principal balance, accrued interest and related advances, (b) indemnify the purchaser against any loss it suffers or (c) make the purchaser whole for the economic benefits of the loan and its related servicing rights. The repurchase, indemnification and make-whole obligations vary based upon the terms of the applicable agreements, the nature of the asserted breach and the status of the mortgage loan at the time a claim is made. The Company establishes reserves for estimated losses of this nature inherent in the sale of mortgage loans by estimating the
Leases	Leases Right of use (“ROU”) assets represent the Company’s right to use an underlying asset during the lease term and lease liabilities represent its obligation to make lease payments arising from the lease. Lease agreements may contain extension options which typically provide for an extension of a lease term at the then fair market rental rates. As these extension options are not generally considered reasonably certain of exercise, they are not included in the lease term. Operating leases relate primarily to real estate used for corporate offices and bank branches and finance leases relate primarily to equipment. The Company does not separate lease and non-lease components for real estate leases. For those leases with a term greater than one year, ROU assets and lease liabilities are recognized at lease commencement based on the present value of the remaining lease payments using a discount rate that represents the incremental borrowing rate on the effective date of the lease, which is based on the Company’s collateralized borrowing capabilities over a similar term as the related lease payments. ROU assets are further adjusted for lease incentives. Operating leases in which the Company is the lessee are recorded as operating lease ROU assets and operating lease liabilities, and are included in other assets and other liabilities, respectively, on the consolidated balance sheets. Operating lease expense, which is comprised of amortization of the ROU asset and the implicit interest accreted on the operating lease liability, is recognized on a straight-line basis over the lease term and recorded in net occupancy expense on the consolidated statements of income and other comprehensive income. Finance leases in which the Company is the lessee are recorded as finance lease ROU assets and finance lease liabilities and are included in premises and equipment, net, and other liabilities, respectively, on the consolidated balance sheets. Finance lease expense is comprised of amortization of the ROU asset, which is recognized on a straight-line basis over the lease term and recorded in net occupancy expense on the consolidated statements of income and other comprehensive income, and the implicit interest accreted on the operating lease liability, which is recognized using the effective interest method over the lease term and recorded in interest expense on the consolidated statements of income and other comprehensive income.
Revenue Recognition	Revenue Recognition ASC 606, Revenue from Contracts with Customers (“ASC 606”), establishes principles for reporting information about the nature, amount, timing and uncertainty of revenue and cash flows arising from the entity's contracts to provide goods or services to customers. The core principle requires an entity to recognize revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration that it expects to be entitled to receive in exchange for those goods or services recognized as performance obligations are satisfied. The majority of the Company’s revenue-generating transactions are not subject to ASC 606, including revenue generated from financial instruments, such as loans, letters of credit, derivatives and investment securities, as well as revenue related to mortgage servicing activities, as these activities are subject to other GAAP discussed elsewhere within the Company’s disclosures. Descriptions of revenue-generating activities that are within the scope of ASC 606, which are presented in the income statements as components of non-interest income are as follows: • Service charges on deposit accounts - these represent general service fees for monthly account maintenance and activity- or transaction-based fees and consist of transaction-based revenue, time-based revenue (service period), item-based revenue or some other individual attribute-based revenue. Revenue is recognized when the performance obligation is completed, which is generally monthly for account maintenance services or when a transaction has been completed (such as a stop payment). Payments for these activities are generally received at the time the performance obligations are satisfied. • Wealth management and trust fee income - this represents monthly fees due from wealth management customers as consideration for managing the customers' assets. Wealth management and trust services include custody of assets, investment management, escrow services, fees for trust services and similar fiduciary activities. These fees are typically paid on a quarterly basis and recognized ratably throughout the quarter as the performance obligation is satisfied each month. • Brokered loan fees - these represent fees for the administration and funding of purchased mortgage loan interests as well as facility renewal and application fees received from mortgage originator customers in the mortgage warehouse lending business. Also included are fees received from independent correspondent mortgage lenders as consideration for the purchase of individual residential mortgage loans through the Company’s MCA business. Revenue related to the mortgage warehouse lending business is recognized when the related loan interest is disposed (i.e., through sale or payoff) or upon receipt of the facility renewal or application. Revenue related to the MCA business is recognized at the time a loan is purchased. • Investment banking and trading income - these include fees for merger, acquisition, divestiture and restructuring advisory services, fees for securities underwriting activities, loan syndication fees, and swap fees. Advisory fees are generally earned as performance obligations of the advisory service are satisfied. Underwriting fees are generally recognized upon execution of the client’s issuance of debt or equity instruments. Loan syndication fees are generally recognized upon closing of a loan syndication transaction. • Other non-interest income includes items such as letter of credit fees, bank owned life insurance income, dividends on FHLB and FRB stock and other general operating income, none of which are subject to the requirements of ASC 606. Also included in other-non-interest income are interchange fees earned when commercial credit card clients process transactions through card networks. The Company’s performance obligations are generally complete when the transactions generating the fees are processed.
Stock-based Compensation	Stock-based Compensation The Company accounts for all stock-based compensation transactions in accordance with ASC 718, Compensation — Stock Compensation (“ASC 718”), which requires that stock compensation transactions be recognized as compensation expense on the consolidated statements of income and other comprehensive income based on their fair values on the measurement date, which is generally the date of the grant.
Income Taxes	Income Taxes The Company and its subsidiary file a consolidated federal income tax return. The Company utilizes the liability method in accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based upon the difference between the values of the assets and liabilities as reflected in the financial statements and their related tax basis using enacted tax rates in effect for the year in which the differences are expected to be recovered or settled. As changes in tax law or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes. A valuation allowance is provided against deferred tax assets unless it is more likely than not that such deferred tax assets will be realized. Deferred tax assets, net, are included in other assets on the consolidated balance sheets. The tax effect of unrealized gains and losses on available-for-sale debt securities is recorded to other comprehensive income and is not a component of income tax expense/(benefit). GAAP does not permit the adjustment of tax amounts in AOCI for changes in tax rates; as a result the effects become “stranded” in AOCI. Stranded tax effects caused by the revaluation of deferred taxes are reclassified from AOCI to retained earnings in accordance with ASU 2018-02 “ Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.” Unrecognized tax benefits for the uncertain portion of recorded tax benefits and related interest may result from the application of complex tax laws, rules, regulations and interpretations. Unrecognized tax benefits, as well as estimated penalties and interest, are assessed quarterly and may be adjusted through current income tax expense in future periods based on changing facts and circumstances, completion of examinations by taxing authorities or expiration of a statute of limitations.
Fair Values of Financial Instruments	Fair Values of Financial Instruments ASC 820, Fair Value Measurements and Disclosures (“ASC 820”), defines fair value, establishes a framework for measuring fair value under GAAP and enhances disclosures about fair value measurements. The standard describes three levels of inputs that may be used to measure fair value as provided below. Level 1 Quoted prices in active markets for identical assets or liabilities. Level 2 Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair values requires significant management judgment or estimation. Also required are disclosures of fair value information about financial instruments, whether or not recognized on the balance sheet, for which it is practical to estimate that value. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. The disclosure of fair value information about financial instruments does not and is not intended to represent the fair value of the Company. The following are descriptions of the methods and significant assumptions used by the Company in estimating its fair value disclosures for financial instruments: Cash and Cash Equivalents, Variable Rate Loans, Variable Rate Short-term Borrowings and Variable Rate Long-term Debt The fair value of these financial instruments approximates carrying value. Investment Securities The fair value of the Company’s U.S. Treasury, U.S. government agency and residential mortgage-backed securities are based on prices obtained from independent pricing services. The Company’s U.S. Treasury securities are valued based on quoted market prices for identical securities in an active market and are classified as Level 1 assets in the fair value hierarchy, while the Company’s U.S. government agency and residential mortgage-backed securities are valued based on quoted market prices for the same or similar securities and are characterized as Level 2 assets in the fair value hierarchy. Management obtains documentation from the primary independent pricing service regarding the processes and controls applicable to pricing investment securities, and on a quarterly basis independently verify the prices that were received from the service provider using two additional independent pricing sources. Tax-exempt asset-backed securities and CRT securities are valued using a discounted cash flow model, which utilizes Level 3 inputs, and are classified as Level 3 assets in the fair value hierarchy. Within the investment securities portfolio, the Company holds equity securities that consist of investments that qualify for consideration under the regulations implementing the Community Reinvestment Act and investments related to non-qualified deferred compensation plan. Some of these equity securities are valued using quoted market prices for identical equity securities in an active market and are classified as Level 1 assets in the fair value hierarchy and others are traded in less active markets and are classified as Level 2 assets in the fair value hierarchy. Loans Held for Sale The fair value for loans held for sale is derived from quoted market prices for similar loans, in which case they are characterized as Level 2 assets in the fair value hierarchy, or is derived from third party pricing models, in which case they are characterized as Level 3 assets in the fair value hierarchy. Derivative Assets and Liabilities The estimated fair value of derivative assets and liabilities is obtained from independent pricing services based on quoted market prices for similar derivative contracts and these financial instruments are characterized as Level 2 assets and liabilities in the fair value hierarchy. On a quarterly basis, management independently verifies the fair value using an additional independent pricing source.
Derivative Financial Instruments	Derivative Financial Instruments All contracts that satisfy the definition of a derivative are recorded at fair value in other assets and other liabilities on the consolidated balance sheets, and the related cash flows are recorded in the operating activities section of the consolidated statement of cash flows. The Company records the derivatives on a net basis when a right of offset exists with a single counterparty that is subject to a legally enforceable master netting agreement. Non-Hedging Derivatives The Company enters into an interest rate swap, cap and/or floor derivative instruments with customers while at the same time entering into offsetting interest rate swap, cap and/or floor derivative instruments 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 transaction allows the customer to effectively convert a variable rate loan to a fixed rate. Because the Company acts as an intermediary for its customers, changes in the fair value of the underlying derivative instruments substantially offset each other and do not have a material impact on the Company’s results of operations. The Company offers forward contract derivative instruments, such as to-be-announced U.S. agency residential mortgage-back securities, to its mortgage banking customers to allow the customers to mitigate exposure to market risks associated with the purchase or origination of mortgage loans. To mitigate the Company’s exposure to these forward contracts, the Company will enter offsetting forward contracts, most typically with a financial institution. Any changes in fair value to the forward contract derivative instruments are recorded in investment banking and trading income on the consolidated statements of income and other comprehensive income. The Company also offers foreign currency forward contracts derivative instruments in which the Company enters into a contract with a customer to buy or sell a foreign currency at a future date for a specified price while at the same time entering into an offsetting contract with a financial institution to buy or sell the same currency at the same future date for a specified price. The transaction allows the customer to manage their exposure to foreign currency exchange rate fluctuations. Because the Company acts as an intermediary for its customers, changes in the fair value of the underlying derivative instruments substantially offset each other and do not have a material impact on the Company’s results of operations. Prior to the transition of its MCA program to a third party in 2021, the Company entered into loan purchase commitment contracts with mortgage originators to purchase residential mortgage loans at a future date, as well as forward sales commitment contracts to sell residential mortgage loans or to deliver mortgage-backed securities at a future date. The objective of these transactions was to mitigate the Company’s exposure to interest rate risk associated with the purchase of mortgage loans held for sale. Any changes in fair value were recorded in gain/(loss) on sale of loans held for sale on the consolidated statements of income and other comprehensive income. Prior to the sale of its portfolio of MSRs to a third party in 2021, the Company entered into interest rate derivative contracts, primarily interest rate swap futures and forward sale commitments of mortgage-backed securities, in order to mitigate exposure to potential impairment losses from adverse changes in the fair value of the Company’s residential MSR portfolio. These derivative instruments were considered highly liquid and could be settled daily, which allowed the Company to dynamically manage its exposure. The derivative instruments were used to economically hedge the fair value of the residential MSR portfolio impacted by changes in anticipated prepayments resulting from mortgage interest rate movements and were classified as other assets and other liabilities on the consolidated balance sheets. Any unrealized or realized gains/(losses) related to derivatives economically hedging the residential MSR portfolio were recognized in servicing-related expenses along with changes to the MSR valuation allowance. Derivatives Designated as Hedges The Company enters into interest rate derivative contracts that are designated as qualifying cash flow hedges to hedge the exposure to variability in expected future cash flows attributable to changes in a contractually specified interest rate. To qualify for hedge accounting, a formal assessment is prepared to determine whether the hedging relationship, both at inception and on an ongoing basis, is expected to be highly effective in achieving offsetting cash flows attributable to the hedged risk during the term of the hedge if a cash flow hedge. At inception a statistical regression analysis is prepared to determine hedge effectiveness. At each reporting period thereafter, a statistical regression or qualitative analysis is performed. If it is determined that hedge effectiveness has not been or will not continue to be highly effective, then hedge accounting ceases and any gain or loss in AOCI is recognized in earnings immediately. The cash flow hedges are recorded at fair value in other assets and other liabilities on the consolidated balance sheets with changes in fair value recorded in AOCI, net of tax. Amounts recorded to AOCI are reclassified into earnings in the same period in which the hedged asset or liability affects earnings and are presented in the same income statement line item as the earnings effect of the hedged asset or liability.
Segment Reporting	Segment Reporting The Company has determined that all of its banking divisions and subsidiaries meet the aggregation criteria of ASC 280, Segment Reporting , as its current operating model is structured whereby banking divisions and subsidiaries serve a similar base of primarily commercial clients utilizing a company-wide offering of similar products and services managed through similar processes and platforms that are collectively reviewed by the chief operating decision maker.
New Accounting Standards	ASU 2022-02, “Financial Instruments - Credit Losses (Topic 326)” (“ASU 2022-02”) eliminates the guidance on troubled debt restructurings and requires entities to evaluate all loan modifications to determine if they result in a new loan or a continuation of the existing loan. ASU 2022-02 also requires that entities disclose current-period gross charge-offs by year of origination for loans and leases. ASU 2022-02 is effective January 1, 2023 and is not expected to have a significant impact on the Company’s financial statements. Accounting Standard Update 2022-04, “Liabilities - Supplier Finance Programs (Subtopic 405-50)” (“ASU 2022-04”) enhances the transparency of supplier finance programs and the related financial statement disclosures. The amendments require that a buyer in a supplier finance program disclose information about the key terms of the program, outstanding confirmed amounts as of the end of the period, a rollforward of such amounts during each annual period and a description of where in the financial statements outstanding amounts are presented. ASU 2022-04 is effective January 1, 2023, except for the disclosure of rollforward information, which is effective January 1, 2024, and is not expected to have an impact on the Company’s consolidated financial statements. ASU 2022-06, “Reference Rate Reform (Topic 848)” (“ASU 2022-06”) provides optional guidance to ease the potential burden in account for (or recognizing the effects of) reference rate reform on financial reporting. The objective of the guidance is to provide temporary relief during the transition period away from LIBOR toward new interest rate benchmarks. The amendments in ASU 2022-06 defer the sunset date provision from December 31, 2022 to December 31, 2024. ASU 2022-06 was effective immediately upon issuance and is not expected to have an impact on the Company’s financial statements or disclosures.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2022
Earnings Per Share [Abstract]
Schedule of computation of basic and diluted earnings per share	The following table presents the computation of basic and diluted earnings per share: Year ended December 31, (in thousands except share and per share data) 2022 2021 2020 Numerator: Net income $ 332,478 $ 253,939 $ 66,289 Preferred stock dividends 17,250 18,721 9,750 Net income available to common stockholders $ 315,228 $ 235,218 $ 56,539 Denominator: Denominator for basic earnings per common share—weighted average common shares 50,457,746 50,580,660 50,430,326 Effect of dilutive outstanding stock-settled awards 588,996 560,314 152,653 Denominator for dilutive earnings per common share—weighted average diluted common shares 51,046,742 51,140,974 50,582,979 Basic earnings per common share $ 6.25 $ 4.65 $ 1.12 Diluted earnings per common share $ 6.18 $ 4.60 $ 1.12 Anti-dilutive outstanding stock-settled awards 311,226 93,945 453,024

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Summary of Available-for-Sale Debt Securities	The following is a summary of the Company’s investment securities: (in thousands) Amortized Gross Gross Estimated December 31, 2022 Available-for-sale debt securities: U.S. Treasury securities $ 698,769 $ — $ (28,187) $ 670,582 U.S. government agency securities 125,000 — (22,846) 102,154 Residential mortgage-backed securities 2,162,364 3 (331,320) 1,831,047 Tax-exempt asset-backed securities — — — — CRT securities 14,713 — (2,852) 11,861 Total available-for-sale debt securities 3,000,846 3 (385,205) 2,615,644 Held-to-maturity debt securities: Residential mortgage-backed securities 935,514 — (118,600) 816,914 Total held-to-maturity debt securities 935,514 — (118,600) 816,914 Equity securities 33,956 Total investment securities(2) $ 3,585,114 December 31, 2021 Available-for-sale debt securities: U.S. government agency securities $ 125,000 $ — $ (4,056) $ 120,944 Residential mortgage-backed securities 3,288,261 156 (63,039) 3,225,378 Tax-exempt asset-backed securities 170,626 9,407 — 180,033 CRT securities 14,713 — (2,867) 11,846 Total available-for-sale debt securities 3,598,600 9,563 (69,962) 3,538,201 Equity securities 45,607 Total investment securities(2) $ 3,583,808 (1) Excludes accrued interest receivable of $6.6 million and $6.6 million at December 31, 2022 and December 31, 2021, respectively, related to available-for-sale debt securities and $1.5 million at December 31, 2022 related to held-to-maturity debt securities that is recorded in accrued interest receivable and other assets on the consolidated balance sheets. (2) Includes available-for-sale debt securities and equity securities at estimated fair value and held-to-maturity debt securities at amortized cost.
Schedule of Amortized Cost and Estimated Fair Value of Securities	The amortized cost and estimated fair value as of December 31, 2022, excluding accrued interest receivable, of available-for-sale and held-to-maturity debt securities are presented below by contractual maturity. Actual maturities may differ from contractual maturities of mortgage-backed securities because borrowers may have the right to call or prepay obligations with or without prepayment penalties. Available-for-sale Held-to-maturity (in thousands) Amortized Cost Fair Value Amortized Cost Fair Value Due within one year $ 14 $ 14 $ — $ — Due after one year through five years 698,769 670,582 — — Due after five years through ten years 156,551 128,026 — — Due after ten years 2,145,512 1,817,022 935,514 816,914 Total $ 3,000,846 $ 2,615,644 $ 935,514 $ 816,914
Schedule of Available-for-Sale Debt Securities in a Continuous Unrealized Loss Position	The following table discloses the Company’s available-for-sale debt securities that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for 12 or more months: Less Than 12 Months 12 Months or Longer Total (in thousands) Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss December 31, 2022 U.S. Treasury securities $ 670,582 $ (28,187) $ — $ — $ 670,582 $ (28,187) U.S. government agency securities — — 102,154 (22,846) 102,154 (22,846) Residential mortgage-backed securities 261,502 (9,481) 1,569,107 (321,839) 1,830,609 (331,320) CRT securities — — 11,861 (2,852) 11,861 (2,852) Total $ 932,084 $ (37,668) $ 1,683,122 $ (347,537) $ 2,615,206 $ (385,205) December 31, 2021 U.S. government agency securities $ 24,085 $ (915) $ 96,859 $ (3,141) $ 120,944 $ (4,056) Residential mortgage-backed securities 2,871,052 (50,721) 303,491 (12,318) 3,174,543 (63,039) CRT securities — — 11,846 (2,867) 11,846 (2,867) Total $ 2,895,137 $ (51,636) $ 412,196 $ (18,326) $ 3,307,333 $ (69,962)
Summary of Unrealized and Realized Gains/(Losses) Recognized in Net Income on Equity Securities	The following is a summary of unrealized and realized gains/(losses) recognized on equity securities included in other non-interest income on the consolidated statements of income and other comprehensive income: Year Ended December 31, 2022 (in thousands) 2022 2021 Net gains/(losses) recognized during the period $ (7,876) 2,277 Less: Realized net gains/(losses) recognized on securities sold 714 1,065 Unrealized net gains/(losses) recognized on securities still held $ (8,590) 1,212

Loans Held for Investment and_2

Loans Held for Investment and Allowance for Loan Losses (Tables)	12 Months Ended
	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Schedule of loans held for investments	Loans are summarized by portfolio segment as follows: December 31, (in thousands) 2022 2021 Loans held for investment(1): Commercial $ 8,902,948 $ 9,897,561 Energy 1,159,296 721,373 Mortgage finance 4,090,033 7,475,497 Real estate 5,198,643 4,777,530 Gross loans held for investment 19,350,920 22,871,961 Unearned income (net of direct origination costs) (63,580) (65,007) Total loans held for investment 19,287,340 22,806,954 Allowance for credit losses on loans (253,469) (211,866) Total loans held for investment, net $ 19,033,871 $ 22,595,088 Loans held for sale: Mortgage loans, at fair value $ — $ 8,123 Non-mortgage loans, at lower of cost or fair value 36,357 — Total loans held for sale $ 36,357 $ 8,123 (1) Excludes accrued interest receivable of $100.4 million and $50.9 million at December 31, 2022 and December 31, 2021, respectively, that is recorded in accrued interest receivable and other assets on the consolidated balance sheets.
Schedule of the credit risk profile of loan portfolio by internally assigned grades and nonaccrual status	The following tables summarize gross loans held for investment by year of origination and internally assigned credit grades: (in thousands) 2022 2021 2020 2019 2018 2017 and prior Revolving lines of credit Revolving lines of credit converted to term loans Total December 31, 2022 Commercial (1-7) Pass $ 1,903,529 $ 671,459 $ 244,568 $ 255,444 $ 325,201 $ 244,373 $ 4,877,753 $ 21,063 $ 8,543,390 (8) Special mention 9,141 7,740 3,628 37,794 11,998 4,975 95,310 2,250 172,836 (9) Substandard - accruing 18,670 71,147 514 1,666 14,933 6,305 30,070 — 143,305 (9+) Non-accrual 376 512 751 30,425 6,226 2,520 2,607 — 43,417 Total commercial $ 1,931,716 $ 750,858 $ 249,461 $ 325,329 $ 358,358 $ 258,173 $ 5,005,740 $ 23,313 $ 8,902,948 Energy (1-7) Pass $ 124,691 $ 12,517 $ — $ — $ — $ 3,317 $ 1,007,776 $ — $ 1,148,301 (8) Special mention — — — — — — — — — (9) Substandard - accruing — — — — — — 7,337 — 7,337 (9+) Non-accrual — — — — — — 3,658 — 3,658 Total energy $ 124,691 $ 12,517 $ — $ — $ — $ 3,317 $ 1,018,771 $ — $ 1,159,296 Mortgage finance (1-7) Pass $ 30,485 $ 482,477 $ 197,045 $ 267,758 $ 464,753 $ 2,647,515 $ — $ — $ 4,090,033 (8) Special mention — — — — — — — — — (9) Substandard - accruing — — — — — — — — — (9+) Non-accrual — — — — — — — — — Total mortgage finance $ 30,485 $ 482,477 $ 197,045 $ 267,758 $ 464,753 $ 2,647,515 $ — $ — $ 4,090,033 Real estate CRE (1-7) Pass $ 1,085,254 $ 756,180 $ 563,341 $ 447,346 $ 183,634 $ 284,698 $ 97,337 $ 11,944 $ 3,429,734 (8) Special mention 2,765 6,524 37,791 5,295 19,350 3,652 — — 75,377 (9) Substandard - accruing — 17,850 — — 11,458 17,698 — — 47,006 (9+) Non-accrual — — — — — 182 — — 182 RBF (1-7) Pass 94,066 70,951 12,161 6,106 2,655 — 326,164 — 512,103 (8) Special mention — — — — — — — — — (9) Substandard - accruing 7,840 — — — — — — — 7,840 (9+) Non-accrual — — — — — — — — — Other (1-7) Pass 182,840 131,538 94,611 67,518 76,951 163,838 42,333 31,293 790,922 (8) Special mention 729 — 8,721 — — 386 — — 9,836 (9) Substandard - accruing — — — 247 — 1,035 — — 1,282 (9+) Non-accrual — — 1,081 — — — — — 1,081 Secured by 1-4 family (1-7) Pass 64,050 89,967 53,003 24,314 16,953 70,082 4,911 — 323,280 (8) Special mention — — — — — — — — — (9) Substandard - accruing — — — — — — — — — (9+) Non-accrual — — — — — — — — — Total real estate $ 1,437,544 $ 1,073,010 $ 770,709 $ 550,826 $ 311,001 $ 541,571 $ 470,745 $ 43,237 $ 5,198,643 Total $ 3,524,436 $ 2,318,862 $ 1,217,215 $ 1,143,913 $ 1,134,112 $ 3,450,576 $ 6,495,256 $ 66,550 $ 19,350,920 (in thousands) 2021 2020 2019 2018 2017 2016 and prior Revolving lines of credit Revolving lines of credit converted to term loans Total December 31, 2021 Commercial (1-7) Pass $ 1,133,013 $ 3,157,150 $ 546,520 $ 319,246 $ 200,478 $ 289,795 $ 3,960,706 $ 41,377 $ 9,648,285 (8) Special mention 2,650 5,277 23,129 8,697 39 5,322 5,120 7,883 58,117 (9) Substandard - accruing — 7,705 102,619 25,010 6,202 6,962 14,742 2,007 165,247 (9+) Non-accrual 736 1,191 49 12,955 1,166 6,196 3,619 — 25,912 Total commercial $ 1,136,399 $ 3,171,323 $ 672,317 $ 365,908 $ 207,885 $ 308,275 $ 3,984,187 $ 51,267 $ 9,897,561 Energy (1-7) Pass $ 71,750 $ — $ — $ 3 $ — $ 7,188 $ 577,988 $ — $ 656,929 (8) Special mention — — — — — — 27,421 — 27,421 (9) Substandard - accruing — — — — — 8,643 — — 8,643 (9+) Non-accrual — — — — — — 28,380 — 28,380 Total energy $ 71,750 $ — $ — $ 3 $ — $ 15,831 $ 633,789 $ — $ 721,373 Mortgage finance (1-7) Pass $ 289,042 $ 590,616 $ 656,445 $ 754,507 $ 332,001 $ 4,852,886 $ — $ — $ 7,475,497 (8) Special mention — — — — — — — — — (9) Substandard - accruing — — — — — — — — — (9+) Non-accrual — — — — — — — — — Total mortgage finance $ 289,042 $ 590,616 $ 656,445 $ 754,507 $ 332,001 $ 4,852,886 $ — $ — $ 7,475,497 Real estate CRE (1-7) Pass $ 497,462 $ 576,344 $ 600,005 $ 294,005 $ 155,252 $ 451,042 $ 73,988 $ 25,970 $ 2,674,068 (8) Special mention — — 291 8,827 20,089 26,344 — — 55,551 (9) Substandard - accruing 17,850 — — 40,900 37,393 38,188 — 2,308 136,639 (9+) Non-accrual — — — — — 198 — — 198 RBF (1-7) Pass 155,595 44,362 9,693 8,565 — 12,732 460,888 — 691,835 (8) Special mention — — — — — — — — — (9) Substandard - accruing — — — — — — — — — (9+) Non-accrual — — — — — — — — — Other (1-7) Pass 166,202 148,811 119,017 106,343 61,723 139,723 47,653 29,595 819,067 (8) Special mention — 7,365 — — 845 4,982 — — 13,192 (9) Substandard - accruing — 6,424 — — 16,922 20,184 — — 43,530 (9+) Non-accrual — — — — 2,641 1,450 — 13,741 17,832 Secured by 1-4 family (1-7) Pass 96,899 60,659 40,586 22,976 31,826 65,910 4,535 — 323,391 (8) Special mention — 553 — — — 291 — — 844 (9) Substandard - accruing — — — — — 1,203 — — 1,203 (9+) Non-accrual — — — — — 180 — — 180 Total real estate $ 934,008 $ 844,518 $ 769,592 $ 481,616 $ 326,691 $ 762,427 $ 587,064 $ 71,614 $ 4,777,530 Total $ 2,431,199 $ 4,606,457 $ 2,098,354 $ 1,602,034 $ 866,577 $ 5,939,419 $ 5,205,040 $ 122,881 $ 22,871,961
Schedule of activity in the reserve for loan losses by portfolio segment	The following table details activity in the allowance for credit losses on loans. Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories. (in thousands) Commercial Energy Mortgage Real Total Year Ended December 31, 2022 Beginning balance $ 102,202 $ 52,568 $ 6,083 $ 51,013 $ 211,866 Provision for credit losses on loans 51,571 (981) 4,662 6,220 61,472 Charge-offs 17,614 5,605 — 350 23,569 Recoveries 682 3,018 — — 3,700 Net charge-offs (recoveries) 16,932 2,587 — 350 19,869 Ending balance $ 136,841 $ 49,000 $ 10,745 $ 56,883 $ 253,469 Year Ended December 31, 2021 Beginning balance $ 73,061 $ 84,064 $ 4,699 $ 92,791 $ 254,615 Provision for credit losses on loans 36,733 (27,045) 1,384 (40,903) (29,831) Charge-offs 11,987 6,418 — 1,192 19,597 Recoveries 4,395 1,967 — 317 6,679 Net charge-offs (recoveries) 7,592 4,451 — 875 12,918 Ending balance $ 102,202 $ 52,568 $ 6,083 $ 51,013 $ 211,866
Schedule of an age analysis of accruing past due loans	The table below provides an age analysis of loans held for investment: (in thousands) 30-59 Days 60-89 Days 90 Days or More Past Due Total Past Non-accrual(2) Current Total Non-accrual With No Allowance December 31, 2022 Commercial $ 6,714 $ 3,041 $ 131 $ 9,886 $ 43,417 $ 8,849,645 $ 8,902,948 $ 41,476 Energy — — — — 3,658 1,155,638 1,159,296 3,658 Mortgage finance — — — — — 4,090,033 4,090,033 — Real estate CRE 440 — — 440 182 3,551,677 3,552,299 — RBF — — — — — 519,943 519,943 — Other 2,438 — — 2,438 1,081 799,602 803,121 — Secured by 1-4 family — — — — — 323,280 323,280 — Total $ 9,592 $ 3,041 $ 131 $ 12,764 $ 48,338 $ 19,289,818 $ 19,350,920 $ 45,134 (1) As of December 31, 2022 $2.2 million of non-accrual loans were earning interest income on a cash basis compared to none as of December 31, 2021. Additionally, $801,000 and $624,000 of interest income was recognized on non-accrual loans for the years ended December 31, 2022 and 2021, respectively. Accrued interest of $1.6 million and $1.2 million was reversed during the years ended December 31, 2022 and 2021, respectively.
Schedule of loans that have been restructured	The following table details the recorded investment at December 31, 2022 of loans restructured during the year ended December 31, 2022: Extended Maturity Adjusted Payment Schedule Total (dollars in thousands) Number of Contracts Balance at Period End Number of Contracts Balance at Period End Number of Contracts Balance at Period End Year Ended December 31, 2022 Commercial — $ — 1 $ 531 1 $ 531 Total — — 1 531 1 531

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
Right-Of-Use Assets and Lease Liabilities	The following table presents ROU assets and lease liabilities: Year Ended December 31, (in thousands) 2022 2021 ROU assets: Finance leases $ 2,865 $ 259 Operating leases 79,889 55,330 Total $ 82,754 $ 55,589 Lease liabilities Finance leases $ 2,877 $ 259 Operating leases 103,814 69,184 Total $ 106,691 $ 69,443
Summary of lease cost and other information, operating leases	The table below summarizes the Company’s net lease cost: Year Ended December 31, (in thousands) 2022 2021 Finance lease cost: Amortization of ROU assets $ 1,108 $ 32 Interest on lease liabilities 34 1 Operating lease cost 23,463 15,608 Short-term lease cost 19 19 Variable lease cost 5,122 4,747 Sublease income (18) (107) Net lease cost $ 29,728 $ 20,299 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from finance leases $ 34 $ 1 Operating cash flows from operating leases 21,910 17,666 Financing cash flows from finance leases 1,096 32 ROU assets obtained in exchange for new finance leases 3,714 291 ROU assets obtained in exchange for new operating leases 57,544 2,109
Assets and Liabilities, Lessee	The table below summarizes other information related to operating and finance leases: Year Ended December 31, 2022 2021 Weighted-average remaining lease term - finance leases, in years 2.2 2.7 Weighted-average remaining lease term - operating leases, in years 11.5 5.9 Weighted-average discount rate - finance leases 1.74 % 0.77 % Weighted-average discount rate - operating leases 4.16 % 2.30 %
Summary of maturity of remaining lease liabilities	The table below summarizes the maturity of remaining lease liabilities as of December 31, 2022: (in thousands) Finance Leases Operating Leases Total 2023 $ 1,367 $ 16,993 $ 18,360 2024 1,334 13,130 14,464 2025 237 9,756 9,993 2026 — 10,022 10,022 2027 — 9,921 9,921 2028 and thereafter — 78,306 78,306 Total lease payments 2,938 138,128 141,066 Less: Interest (61) (34,314) (34,375) Present value of lease liabilities $ 2,877 $ 103,814 $ 106,691

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of goodwill and other intangible assets	Goodwill and other intangible assets are summarized as follows: (in thousands) Goodwill and Intangible Assets Accumulated Goodwill and Intangible Assets, Net December 31, 2022 Goodwill $ 1,870 $ (374) $ 1,496 Intangible assets—customer relationships and trademarks — — — Total goodwill and intangible assets $ 1,870 $ (374) $ 1,496 December 31, 2021 Goodwill $ 15,468 $ (374) $ 15,094 Intangible assets—customer relationships and trademarks 9,006 (6,838) 2,168 Total goodwill and intangible assets $ 24,474 $ (7,212) $ 17,262

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Summary of premises and equipment	Premises and equipment are summarized as follows: December 31, (in thousands) 2022 2021 Premises $ 34,930 $ 32,609 Furniture and equipment 54,581 43,852 Total cost 89,511 76,461 Accumulated depreciation (63,129) (55,560) Total premises and equipment, net $ 26,382 $ 20,901

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2022
Deposits [Abstract]
Schedule of deposits	Deposits are summarized as follows: December 31, (in thousands) 2022 2021 Non-interest bearing deposits $ 9,618,081 $ 13,390,370 Interest bearing deposits: Transaction 683,562 2,837,521 Savings 11,042,658 10,682,768 Time 1,512,579 1,198,706 Total interest bearing deposits 13,238,799 14,718,995 Total deposits $ 22,856,880 $ 28,109,365
Schedule of maturities of interest-bearing time deposits	The scheduled maturities of interest bearing time deposits were as follows at December 31, 2022: (in thousands) 2023 $ 1,482,377 2024 26,777 2025 3,272 2026 52 2027 101 2028 and after — Total $ 1,512,579

Short-Term Borrowings and Lon_2

Short-Term Borrowings and Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
Summary of borrowings	The table below presents a summary of the Company’s short-term borrowings, all of which mature within one year: (dollars in thousands) Federal Funds Purchased Customer Repurchase Agreements FHLB Borrowings December 31, 2022 Amount outstanding at year-end $ — $ 1,142 $ 1,200,000 Interest rate at year-end — % 0.25 % 4.25 % Average balance outstanding during the year $ 30,741 $ 1,928 $ 1,797,082 Weighted-average interest rate during the year 1.17 % 0.28 % 1.60 % Maximum month-end outstanding during the year $ 525,000 $ 2,320 $ 2,650,000 December 31, 2021 Amount outstanding at year-end $ — $ 2,832 $ 2,200,000 Interest rate at year-end — % 0.25 % 0.13 % Average balance outstanding during the year $ 88,916 $ 4,199 $ 2,306,165 Weighted-average interest rate during the year 0.15 % 0.28 % 0.19 % Maximum month-end outstanding during the year $ 302,301 $ 5,487 $ 2,600,000 The table below presents a summary of long-term debt: December 31, (in thousands) 2022 2021 Bank-issued floating rate senior unsecured credit-linked notes due 2024 $ 272,492 $ 270,487 Bank-issued 5.25% fixed rate subordinated notes due 2026 174,196 173,935 Company-issued 4.00% fixed rate subordinated notes due 2031 371,348 370,910 Trust preferred floating rate subordinated debentures due 2032 to 2036 113,406 113,406 Total long-term debt $ 931,442 $ 928,738
Summary of significant terms of preferred subordinated debentures	The following table summarizes the significant terms of the Company’s trust preferred subordinated debentures: (dollars in thousands) Texas Capital Texas Capital Texas Capital Texas Capital Texas Capital Date issued November 19, 2002 April 10, 2003 October 6, 2005 April 28, 2006 September 29, 2006 Trust preferred securities issued $10,310 $10,310 $25,774 $25,774 $41,238 Floating or fixed rate securities Floating Floating Floating Floating Floating Interest rate on subordinated debentures 3 month LIBOR + 3.35% 3 month LIBOR + 3.25% 3 month LIBOR + 1.51% 3 month LIBOR + 1.60% 3 month LIBOR + 1.71% Maturity date November 2032 April 2033 December 2035 June 2036 December 2036

Financial Instruments with Of_2

Financial Instruments with Off-Balance Sheet Risk (Tables)	12 Months Ended
	Dec. 31, 2022
Risks and Uncertainties [Abstract]
Schedule of financial instruments with off-balance sheet risk	The table below presents the Company’s financial instruments with off-balance sheet risk, as well as the activity in the allowance for off-balance sheet credit losses related to those financial instruments: Year Ended December 31, (in thousands) 2022 2021 Beginning balance of allowance for off-balance sheet credit losses $ 17,265 $ 17,434 Provision for off-balance sheet credit losses 4,528 (169) Ending balance of allowance for off-balance sheet credit losses $ 21,793 $ 17,265 December 31, (in thousands) 2022 2021 Commitments to extend credit - period end balance $ 9,673,082 $ 9,445,763 Standby letters of credit - period end balance 417,896 357,672

Regulatory Ratios and Capital (

Regulatory Ratios and Capital (Tables)	12 Months Ended
	Dec. 31, 2022
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Schedule of compliance with Regulatory Capital Requirements	The table below summarizes the Company’s and the Bank’s actual and required capital ratios under the Basel III Capital Rules. The ratios presented below include the effects of the election to utilize the five-year CECL transition described above. Actual Minimum Capital Required(2) Capital Required to be Well Capitalized (dollars in thousands) Capital Amount Ratio Capital Amount Ratio Capital Amount Ratio December 31, 2022 CET1 Company $ 3,180,208 13.00 % $ 1,712,608 7.00 % N/A N/A Bank 3,408,178 13.95 % 1,710,056 7.00 % 1,587,909 6.50 % Total capital (to risk-weighted assets) Company 4,331,098 17.70 % 2,568,912 10.50 % 2,446,583 10.00 % Bank 3,987,720 16.32 % 2,565,083 10.50 % 2,442,937 10.00 % Tier 1 capital (to risk-weighted assets) Company 3,590,208 14.67 % 2,079,595 8.50 % 1,467,950 6.00 % Bank 3,568,178 14.61 % 2,076,496 8.50 % 1,954,349 8.00 % Tier 1 capital (to average assets)(1) Company 3,590,208 11.54 % 1,244,494 4.00 % N/A N/A Bank 3,568,178 11.48 % 1,243,232 4.00 % 1,554,039 5.00 % December 31, 2021 CET1 Company $ 2,949,785 11.06 % $ 1,866,444 7.00 % N/A N/A Bank 3,013,170 11.30 % 1,866,303 7.00 % 1,732,996 6.50 % Total capital (to risk-weighted assets) Company 4,085,540 15.32 % 2,799,666 10.50 % 2,666,348 10.00 % Bank 3,578,014 13.42 % 2,799,455 10.50 % 2,666,148 10.00 % Tier 1 capital (to risk-weighted assets) Company 3,359,785 12.60 % 2,266,396 8.50 % 1,599,809 6.00 % Bank 3,173,170 11.90 % 2,266,225 8.50 % 2,132,918 8.00 % Tier 1 capital (to average assets)(1) Company 3,359,785 9.01 % 1,490,902 4.00 % N/A N/A Bank 3,173,170 8.51 % 1,490,677 4.00 % 1,863,346 5.00 % (1) The Tier 1 capital ratio (to average assets) is not impacted by the Basel III Capital Rules; however, the Federal Reserve Board and the FDIC may require the Company and the Bank, respectively, to maintain a Tier 1 capital ratio (to average assets) above the required minimum. (2) Percentages represent the minimum capital ratios plus, as applicable, the fully phased-in 2.5% CET1 capital buffer under the Basel III Capital Rules.

Stock-Based Compensation and _2

Stock-Based Compensation and Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2022
Compensation Related Costs [Abstract]
Schedule of stock appreciation rights activity	A summary of the Company’s SAR activity and related information is as follows. Grants of SARs include time-based vesting conditions that generally vest ratably over a period of five years. December 31, 2022 December 31, 2021 December 31, 2020 SARs Weighted Average Exercise Price SARs Weighted Average Exercise Price SARs Weighted Average Exercise Price Outstanding at beginning of year 3,000 $ 44.20 12,400 $ 43.48 21,200 $ 33.95 Exercised (3,000) 44.20 (9,400) 43.24 (8,800) 20.52 Outstanding at year-end — $ — 3,000 $ 44.20 12,400 $ 43.48 Vested and exercisable at year-end — $ — 3,000 $ 44.20 12,400 $ 43.48 Weighted average remaining contractual life of vested (in years) 0.00 1.66 2.26 Weighted average remaining contractual life of outstanding (in years) 0.00 1.66 2.26 Compensation expense $ — $ — $ — Unrecognized compensation expense $ — $ — $ — Intrinsic value of exercised $ 64,000 $ 302,000 $ 294,000
Summary of status and changes in nonvested restricted stock units	A summary of the Company’s RSU activity and related information is as follows. Grants of RSUs include time-based vesting conditions that generally vest ratably over a period of three three December 31, 2022 December 31, 2021 December 31, 2020 RSUs Weighted RSUs Weighted RSUs Weighted Outstanding at beginning of year 1,206,862 $ 56.06 955,594 $ 48.76 558,312 $ 64.95 Granted 454,314 68.15 677,472 66.31 631,092 39.37 Vested (308,771) 54.51 (187,530) 58.82 (171,494) 65.17 Forfeited (196,753) 58.42 (238,674) 53.76 (62,316) 56.92 Outstanding at year-end 1,155,652 $ 61.12 1,206,862 $ 56.06 955,594 $ 48.76 Compensation expense $ 21,246,000 $ 30,060,000 $ 15,655,000 Unrecognized compensation expense $ 32,148,000 $ 32,525,000 $ 29,146,000 Weighted average years over which unrecognized compensation expense is expected to be recognized 2.31 2.79 2.83

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Schedule of income tax expense/(benefit)	Year ended December 31, (in thousands) 2022 2021 2020 Current: Federal $ 109,370 $ 97,608 $ 32,701 State 7,302 6,761 920 Total 116,672 104,369 33,621 Deferred: Federal (16,178) (19,020) (7,964) State (1,217) (1,233) — Total (17,395) (20,253) (7,964) Total expense: Federal 93,192 78,588 24,737 State 6,085 5,528 920 Total $ 99,277 $ 84,116 $ 25,657
Reconciliation of income attributable to continuing operations	The reconciliation of income tax at the U.S. federal statutory tax rate to income tax expense and effective tax rate is as follows: Year ended December 31, 2022 2021 2020 (dollars in thousands) Amount Rate Amount Rate Amount Rate U.S. statutory rate $ 90,669 21 % $ 70,992 21 % $ 19,309 21 % State taxes 6,822 2 % 4,108 1 % 726 1 % Tax-exempt income (1,061) — % (1,855) (1) % (3,356) (4) % Tax credits (128) — % (179) — % (1,216) (1) % Disallowed FDIC 1,491 — % 2,936 1 % 3,920 4 % Disallowed compensation 2,771 1 % 6,377 2 % 3,098 3 % Other (1,287) (1) % 1,737 1 % 3,176 4 % Total $ 99,277 23 % $ 84,116 25 % $ 25,657 28 %
Schedule of deferred tax assets and liabilities	December 31, (in thousands) 2022 2021 Deferred tax assets: Allowance for credit losses $ 62,154 $ 51,738 Lease liabilities 24,091 15,615 Loan origination fees 14,385 11,204 Stock compensation 5,031 4,649 Non-accrual interest 1,132 1,874 Non-qualified deferred compensation 4,782 6,705 Net unrealized losses in AOCI 111,365 12,684 Other 4,678 1,671 Total deferred tax assets 227,618 106,140 Deferred tax liabilities: Loan origination costs (3,217) (3,110) Leases (12,863) (8,414) Lease ROU assets (19,807) (14,266) Depreciation (9,034) (10,567) Other (284) (3,446) Total deferred tax liabilities (45,205) (39,803) Net deferred tax asset $ 182,413 $ 66,337

Fair Value Disclosures (Tables)

Fair Value Disclosures (Tables)	12 Months Ended
	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Schedule of assets and liabilities measured at fair value	Assets and liabilities measured at fair value are as follows: Fair Value Measurements Using (in thousands) Level 1 Level 2 Level 3 December 31, 2022 Available-for-sale debt securities:(1) U.S. Treasury securities $ 670,582 $ — $ — U.S. government agency securities — 102,154 — Residential mortgage-backed securities — 1,831,047 — CRT securities — — 11,861 Equity securities(1)(2) 22,879 11,077 — Derivative assets(4) — 13,504 — Derivative liabilities(4) — 91,758 — Non-qualified deferred compensation plan liabilities(5) 21,177 — — December 31, 2021 Available-for-sale debt securities:(1) U.S. government agency securities $ — $ 120,944 $ — Residential mortgage-backed securities — 3,225,378 — Tax-exempt asset-backed securities — — 180,033 CRT securities — — 11,846 Equity securities(1)(2) 33,589 12,018 — Mortgage loans held for sale(3) — 465 7,658 Derivative assets(4) — 37,788 — Derivative liabilities(4) — 37,788 — Non-qualified deferred compensation plan liabilities(5) 29,695 — — (1) Investment securities are measured at fair value on a recurring basis, generally monthly, except for tax-exempt asset-backed securities and CRT securities, which are measured quarterly. (2) Equity securities consist of investments that qualify for consideration under the regulations implementing the Community Reinvestment Act and investments related to non-qualified deferred compensation plan. (3) Mortgage loans held for sale measured at fair value on a recurring basis, generally monthly. (4) Derivative assets and liabilities are measured at fair value on a recurring basis, generally quarterly. (5) Non-qualified deferred compensation plan liabilities represent the fair value of the obligation to the employee, which generally corresponds to the fair value of the invested assets, and are measured at fair value on a recurring basis, generally monthly.
Level 3 Fair Value Assets Measured on a Recurring Basis	The following table presents a reconciliation of the level 3 fair value category measured at fair value on a recurring basis: Net Realized/Unrealized Gains (Losses) (in thousands) Balance at Beginning of Period Purchases / Additions Sales / Reductions Realized Unrealized Balance at End of Period Year Ended December 31, 2022 Available-for-sale debt securities:(1) Tax-exempt asset-backed securities $ 180,033 $ — $ (170,626) $ — $ (9,407) $ — CRT securities 11,846 — — — 15 11,861 Loans held for sale(2) 7,658 1,569 (8,132) (1,095) — — Year Ended December 31, 2021 Available-for-sale debt securities:(1) Tax-exempt asset-backed securities $ 199,176 $ — $ (14,314) $ — $ (4,829) $ 180,033 CRT securities 11,417 — — — 429 11,846 Loans held for sale(2) 6,933 2,125 (1,428) 5 23 7,658 (1) Unrealized gains/(losses) on available-for-sale debt securities are recorded in AOCI other non-interest income (2) Realized and unrealized gains/(losses) on loans held for sale are recorded in gain/(loss) on sale of loans held for sale
Summary of the carrying amounts and estimated fair values of financial instruments	A summary of the carrying amounts and estimated fair values of financial instruments is as follows: Carrying Estimated Fair Value (in thousands) Total Level 1 Level 2 Level 3 December 31, 2022 Financial assets: Cash and cash equivalents $ 5,012,260 $ 5,012,260 $ 5,012,260 $ — $ — Available-for-sale debt securities 2,615,644 2,615,644 670,582 1,933,201 11,861 Held-to-maturity debt securities 935,514 816,914 — 816,914 — Equity securities 33,956 33,956 22,879 11,077 — Loans held for sale 36,357 36,357 — — 36,357 Loans held for investment, net 19,033,871 18,969,922 — — 18,969,922 Derivative assets 13,504 13,504 — 13,504 — Financial liabilities: Total deposits 22,856,880 22,857,949 — — 22,857,949 Short-term borrowings 1,201,142 1,201,142 — 1,201,142 — Long-term debt 931,442 881,716 — 881,716 — Derivative liabilities 91,758 91,758 — 91,758 — December 31, 2021 Financial assets: Cash and cash equivalents $ 7,946,659 $ 7,946,659 $ 7,946,659 $ — $ — Available-for-sale debt securities 3,538,201 3,538,201 — 3,346,322 191,879 Equity securities 45,607 45,607 33,589 12,018 — Loans held for sale 8,123 8,123 — 465 7,658 Loans held for investment, net 22,595,088 22,631,252 — — 22,631,252 Derivative assets 37,788 37,788 — 37,788 — Financial liabilities: Total deposits 28,109,365 28,109,762 — — 28,109,762 Short-term borrowings 2,202,832 2,202,832 — 2,202,832 — Long-term debt 928,738 952,404 — 952,404 — Derivative liabilities 37,788 37,788 — 37,788 —

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	The notional amounts and estimated fair values of derivative positions outstanding are presented in the following table. December 31, 2022 December 31, 2021 Estimated Fair Value Estimated Fair Value (in thousands) Notional Asset Derivative Liability Derivative Notional Asset Derivative Liability Derivative Derivatives designated as hedges Cash flow hedges: Interest rate contracts: Swaps hedging loans $ 3,000,000 $ — $ 86,378 $ — $ — $ — Non-hedging derivatives Customer-initiated and other derivatives: Interest rate contracts: Swaps 4,396,367 83,529 83,529 3,536,090 40,922 40,922 Caps and floors written 220,142 — 2,583 191,291 94 — Caps and floors purchased 220,142 2,583 — 191,291 — 94 Forward contracts 1,569,326 4,431 4,053 — — — Gross derivatives 90,543 176,543 41,016 41,016 Netting adjustment - offsetting derivative assets/liabilities (5,164) (5,164) (3,228) (3,228) Netting adjustment - cash collateral received/posted (71,875) (79,621) — — Net derivatives included on the consolidated balance sheets $ 13,504 $ 91,758 $ 37,788 $ 37,788

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2022
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table provides the change in AOCI by component: (in thousands) Cash Flow Hedges Available-for-Sale Securities Held-to-Maturity Securities Total Year Ended December 31, 2022 Beginning balance $ — $ (47,715) $ — $ (47,715) Change in unrealized gain/(loss) (85,846) (324,803) (69,165) (479,814) Amounts reclassified into net income 1,803 — 8,102 9,905 Total other comprehensive income/(loss) (84,043) (324,803) (61,063) (469,909) Income tax expense/(benefit) (17,649) (68,209) (12,823) (98,681) Total other comprehensive income/(loss), net of tax (66,394) (256,594) (48,240) (371,228) Ending balance $ (66,394) $ (304,309) $ (48,240) $ (418,943) Year Ended December 31, 2021 Beginning balance $ — $ 15,774 $ — $ 15,774 Change in unrealized gain/(loss) — (80,366) — (80,366) Amounts reclassified into net income — — — — Total other comprehensive income/(loss) — (80,366) — (80,366) Income tax expense/(benefit) — (16,877) — (16,877) Total other comprehensive income/(loss), net of tax — (63,489) — (63,489) Ending balance $ — $ (47,715) $ — $ (47,715)

Parent Company Only (Tables)

Parent Company Only (Tables)	12 Months Ended
	Dec. 31, 2022
Condensed Financial Information Disclosure [Abstract]
Balance Sheet	Balance Sheet December 31, (in thousands) 2022 2021 Assets Cash and cash equivalents $ 245,777 $ 438,761 Investment in subsidiaries 3,183,767 3,155,954 Other assets 93,395 91,301 Total assets $ 3,522,939 $ 3,686,016 Liabilities and Stockholders’ Equity Liabilities: Other liabilities $ 6,754 $ 3,668 Long-term debt 484,754 484,316 Total liabilities 491,508 487,984 Stockholders’ Equity: Preferred stock 300,000 300,000 Common stock 509 506 Additional paid-in capital 1,025,593 1,018,711 Retained earnings 2,239,582 1,926,538 Treasury stock (115,310) (8) Accumulated other comprehensive income/(loss) (418,943) (47,715) Total stockholders’ equity 3,031,431 3,198,032 Total liabilities and stockholders’ equity $ 3,522,939 $ 3,686,016
Statement of Earnings	Statement of Income Year ended December 31, (in thousands) 2022 2021 2020 Interest on notes receivable $ 3,250 $ 3,404 $ 3,402 Dividend income 10,529 10,472 10,496 Other income 9 5 3 Total income 13,788 13,881 13,901 Interest expense 19,721 15,946 10,515 Salaries and employee benefits 782 720 725 Legal and professional 1,583 1,803 3,238 Other non-interest expense 1,636 4,375 4,553 Total expense 23,722 22,844 19,031 Loss before income taxes and equity in undistributed income of subsidiary (9,934) (8,963) (5,130) Income tax benefit (2,282) (2,179) (1,135) Loss before equity in undistributed income of subsidiary (7,652) (6,784) (3,995) Equity in undistributed income of subsidiary 337,946 258,539 68,100 Net income 330,294 251,755 64,105 Preferred stock dividends 17,250 18,721 9,750 Net income available to common stockholders $ 313,044 $ 233,034 $ 54,355
Statement of Cash Flows	Statements of Cash Flows Year ended December 31, (in thousands) 2022 2021 2020 Operating Activities Net income $ 330,294 $ 251,755 $ 64,105 Adjustments to reconcile net income to net cash provided by/(used in) operating activities: Equity in undistributed income of subsidiary (337,946) (258,539) (68,100) Amortization expense 438 2,469 101 Changes in operating assets and liabilities: Accrued interest receivable and other assets (2,095) (1,750) (912) Accrued interest payable and other liabilities 3,086 2,348 (448) Net cash used in operating activities (6,223) (3,717) (5,254) Investing Activities Net decrease in loans held for investment — 7,500 3,000 Investments in and advances to subsidiaries (50,000) — — Net cash provided by/(used in) investing activities (50,000) 7,500 3,000 Financing Activities Issuance of stock related to stock-based awards (4,209) (3,121) (1,986) Net proceeds from issuance of preferred stock — 289,723 — Redemption of preferred stock — (150,000) — Preferred stock dividends paid (17,250) (18,721) (9,750) Repurchase of common stock (115,302) — — Redemption of long-term debt — (111,000) — Net proceeds from Issuance of long-term debt — 370,625 — Net cash provided by/(used in) financing activities (136,761) 377,506 (11,736) Net increase/(decrease) in cash and cash equivalents (192,984) 381,289 (13,990) Cash and cash equivalents at beginning of year 438,761 57,472 71,462 Cash and cash equivalents at end of year $ 245,777 $ 438,761 $ 57,472

Quarterly Financial Data (Table

Quarterly Financial Data (Tables)	12 Months Ended
	Dec. 31, 2022
Selected Quarterly Financial Information [Abstract]
Schedule of Quarterly Financial Information	The tables below summarize quarterly financial information: 2022 Selected Quarterly Financial Data (in thousands except per share data) Fourth Third Second First Interest income $ 371,287 $ 322,071 $ 242,349 $ 208,530 Interest expense 123,687 82,991 36,818 24,983 Net interest income 247,600 239,080 205,531 183,547 Provision for credit losses 34,000 12,000 22,000 (2,000) Net interest income after provision for credit losses 213,600 227,080 183,531 185,547 Non-interest income 277,672 25,333 26,242 20,282 Non-interest expense 213,090 197,047 164,303 153,092 Income before income taxes 278,182 55,366 45,470 52,737 Income tax expense 60,931 13,948 11,311 13,087 Net income 217,251 41,418 34,159 39,650 Preferred stock dividends 4,312 4,313 4,312 4,313 Net income available to common stockholders $ 212,939 $ 37,105 $ 29,847 $ 35,337 Basic earnings per share $ 4.28 $ 0.74 $ 0.59 $ 0.70 Diluted earnings per share $ 4.23 $ 0.74 $ 0.59 $ 0.69 2021 Selected Quarterly Financial Data (in thousands except per share data) Fourth Third Second First Interest income $ 219,892 $ 216,589 $ 216,953 $ 223,151 Interest expense 25,860 26,053 27,496 28,339 Net interest income 194,032 190,536 189,457 194,812 Provision for credit losses (10,000) 5,000 (19,000) (6,000) Net interest income after provision for credit losses 204,032 185,536 208,457 200,812 Non-interest income 31,459 24,779 37,639 44,353 Non-interest expense 146,649 152,987 149,060 150,316 Income before income taxes 88,842 57,328 97,036 94,849 Income tax expense 23,712 13,938 23,555 22,911 Net income 65,130 43,390 73,481 71,938 Preferred stock dividends 4,313 4,312 6,317 3,779 Net income available to common stockholders $ 60,817 $ 39,078 $ 67,164 $ 68,159 Basic earnings per share $ 1.20 $ 0.76 $ 1.31 $ 1.33 Diluted earnings per share $ 1.19 $ 0.76 $ 1.31 $ 1.33

Operations and Summary of Sig_3

Operations and Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands		12 Months Ended
	Nov. 01, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Pre-tax gain on sale		$ 248,526	$ 0	$ 0
Disposal Group, Held-for-sale, Not Discontinued Operations | BankDirect Capital Finance
Property, Plant and Equipment [Line Items]
Business operations and loan portfolio	$ 3,100,000
Purchase price	3,400,000
Pre-tax gain on sale	$ 248,500
Minimum
Property, Plant and Equipment [Line Items]
PPE, useful life		3 years
Finite-lived intangible asset, useful life		1 year
Maximum
Property, Plant and Equipment [Line Items]
PPE, useful life		5 years
Finite-lived intangible asset, useful life		5 years

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Numerator:
Net income	$ 217,251	$ 41,418	$ 34,159	$ 39,650	$ 65,130	$ 43,390	$ 73,481	$ 71,938	$ 332,478	$ 253,939	$ 66,289
Preferred stock dividends	4,312	4,313	4,312	4,313	4,313	4,312	6,317	3,779	17,250	18,721	9,750
Net income available to common stockholders	$ 212,939	$ 37,105	$ 29,847	$ 35,337	$ 60,817	$ 39,078	$ 67,164	$ 68,159	$ 315,228	$ 235,218	$ 56,539
Denominator:
Denominator for basic earnings per common share—weighted average common shares									50,457,746	50,580,660	50,430,326
Effect of employee stock-based awards									588,996	560,314	152,653
Denominator for dilutive earnings per common share—weighted average diluted common shares									51,046,742	51,140,974	50,582,979
Basic earnings per common share (in usd per share)	$ 4.28	$ 0.74	$ 0.59	$ 0.70	$ 1.20	$ 0.76	$ 1.31	$ 1.33	$ 6.25	$ 4.65	$ 1.12
Diluted earnings per common share (in usd per share)	$ 4.23	$ 0.74	$ 0.59	$ 0.69	$ 1.19	$ 0.76	$ 1.31	$ 1.33	$ 6.18	$ 4.60	$ 1.12
Anti-dilutive outstanding stock-settled awards									311,226	93,945	453,024

Investment Securities - Summary

Investment Securities - Summary of Available-for-Sale Debt Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	$ 3,000,846	$ 3,598,600
Gross Unrealized Gains	3	9,563
Gross Unrealized Losses	(385,205)	(69,962)
Estimated Fair Value	2,615,644	3,538,201
Debt Securities, Held-to-Maturity, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract]
Held-to-maturity debt securities	935,514	0
Equity securities at fair value	33,956	45,607
Total investment securities(2)	3,585,114	3,583,808
Interest receivable	100,400	50,900
Available-for-sale Securities
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	3,000,846
Estimated Fair Value	2,615,644
Debt Securities, Held-to-Maturity, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract]
Interest receivable	6,600	6,600
Held-to-Maturity Securities
Debt Securities, Held-to-Maturity, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract]
Estimated Fair Value	816,914
Interest receivable	1,500
US Treasury Securities
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	698,769
Gross Unrealized Gains	0
Gross Unrealized Losses	(28,187)
Estimated Fair Value	670,582
U.S. government agency securities
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	125,000	125,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(22,846)	(4,056)
Estimated Fair Value	102,154	120,944
Residential mortgage-backed securities
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	2,162,364	3,288,261
Gross Unrealized Gains	3	156
Gross Unrealized Losses	(331,320)	(63,039)
Estimated Fair Value	1,831,047	3,225,378
Debt Securities, Held-to-Maturity, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract]
Held-to-maturity debt securities	935,514
Gross Unrealized Gains	0
Gross Unrealized Losses	(118,600)
Estimated Fair Value	816,914
Tax-exempt asset-backed securities
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	0	170,626
Gross Unrealized Gains	0	9,407
Gross Unrealized Losses	0	0
Estimated Fair Value	0	180,033
CRT securities
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	14,713	14,713
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2,852)	(2,867)
Estimated Fair Value	$ 11,861	$ 11,846

Investment Securities - Narrati

Investment Securities - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($) security	Dec. 31, 2021 USD ($)
Debt Securities, Available-for-sale [Line Items]
Number of securities in an unrealized loss position		103
Equity securities at fair value | $		$ 33,956	$ 45,607
Held-to-Maturity Securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale debt securities transferred to held-to-maturity | $	$ 1,000,000
US Treasury Securities
Debt Securities, Available-for-sale [Line Items]
Number of securities in an unrealized loss position		13
U.S. government agency securities
Debt Securities, Available-for-sale [Line Items]
Number of securities in an unrealized loss position		5
CRT securities
Debt Securities, Available-for-sale [Line Items]
Number of securities in an unrealized loss position		2
Residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Number of securities in an unrealized loss position		83
Customer repurchase agreements
Debt Securities, Available-for-sale [Line Items]
Available-for-sale debt securities pledged to secure certain customer repurchase agreements and deposits | $		$ 16,100	22,000
Deposits
Debt Securities, Available-for-sale [Line Items]
Available-for-sale debt securities pledged to secure certain customer repurchase agreements and deposits | $		$ 1,400	$ 2,000

Investment Securities - Schedul

Investment Securities - Schedule of Amortized Cost and Estimated Fair Value of Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Amortized Cost
Amortized Cost	$ 3,000,846	$ 3,598,600
Fair Value
Fair Value	2,615,644	$ 3,538,201
Available-for-sale Securities
Amortized Cost
Due within one year	14
Due after one year through five years	698,769
Due after five years through ten years	156,551
Due after ten years	2,145,512
Amortized Cost	3,000,846
Fair Value
Due within one year	14
Due after one year through five years	670,582
Due after five years through ten years	128,026
Due after ten years	1,817,022
Fair Value	2,615,644
Held-to-Maturity Securities
Amortized Cost
Due within one year	0
Due after one year through five years	0
Due after five years through ten years	0
Due after ten years	935,514
Amortized Cost	935,514
Fair Value
Due within one year	0
Due after one year through five years	0
Due after five years through ten years	0
Due after ten years	816,914
Fair Value	$ 816,914

Investment Securities - Sched_2

Investment Securities - Schedule of Available-for-Sale Debt Securities in a Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	$ 932,084	$ 2,895,137
Less Than 12 Months, Unrealized Loss	(37,668)	(51,636)
12 Months or Longer, Fair Value	1,683,122	412,196
12 Months or Longer, Unrealized Loss	(347,537)	(18,326)
Total, Fair Value	2,615,206	3,307,333
Total, Unrealized Loss	(385,205)	(69,962)
U.S. government agency securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	0	24,085
Less Than 12 Months, Unrealized Loss	0	(915)
12 Months or Longer, Fair Value	102,154	96,859
12 Months or Longer, Unrealized Loss	(22,846)	(3,141)
Total, Fair Value	102,154	120,944
Total, Unrealized Loss	(22,846)	(4,056)
Residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	261,502	2,871,052
Less Than 12 Months, Unrealized Loss	(9,481)	(50,721)
12 Months or Longer, Fair Value	1,569,107	303,491
12 Months or Longer, Unrealized Loss	(321,839)	(12,318)
Total, Fair Value	1,830,609	3,174,543
Total, Unrealized Loss	(331,320)	(63,039)
CRT securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	0	0
Less Than 12 Months, Unrealized Loss	0	0
12 Months or Longer, Fair Value	11,861	11,846
12 Months or Longer, Unrealized Loss	(2,852)	(2,867)
Total, Fair Value	11,861	11,846
Total, Unrealized Loss	(2,852)	$ (2,867)
US Treasury Securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	670,582
Less Than 12 Months, Unrealized Loss	(28,187)
12 Months or Longer, Fair Value	0
12 Months or Longer, Unrealized Loss	0
Total, Fair Value	670,582
Total, Unrealized Loss	$ (28,187)

Investment Securities - Summa_2

Investment Securities - Summary of Unrealized and Realized Gains/(Losses) Recognized in Net Income on Equity Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Net gains/(losses) recognized during the period	$ (7,876)	$ 2,277
Less: Realized net gains/(losses) recognized on securities sold	(714)	(1,065)
Unrealized net gains/(losses) recognized on securities still held	$ (8,590)	$ 1,212

Loans Held for Investment and_3

Loans Held for Investment and Allowance for Loan Losses - Loans Held for Investment by Portfolio Segment (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 19,350,920,000	$ 22,871,961,000
Unearned income (net of direct origination costs)	(63,580,000)	(65,007,000)
Total loans held for investment	19,287,340,000	22,806,954,000
Allowance for credit losses on loans	(253,469,000)	(211,866,000)	$ (254,615,000)
Loans held for investment, net	19,033,871,000	22,595,088,000
Loans held for sale	36,357,000	8,123,000
Interest receivable	100,400,000	50,900,000
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	8,902,948,000	9,897,561,000
Allowance for credit losses on loans	(136,841,000)	(102,202,000)	(73,061,000)
Loans held for sale	36,357,000	0
Energy
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,159,296,000	721,373,000
Allowance for credit losses on loans	(49,000,000)	(52,568,000)	(84,064,000)
Mortgage Finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,090,033,000	7,475,497,000
Allowance for credit losses on loans	(10,745,000)	(6,083,000)	(4,699,000)
Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	5,198,643,000	4,777,530,000
Allowance for credit losses on loans	(56,883,000)	(51,013,000)	$ (92,791,000)
Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale	$ 0	$ 8,123,000

Loans Held for Investment and_4

Loans Held for Investment and Allowance for Loan Losses - Loans by Investment Grade (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	$ 3,524,436	$ 2,431,199
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,318,862	4,606,457
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	1,217,215	2,098,354
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	1,143,913	1,602,034
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	1,134,112	866,577
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	3,450,576	5,939,419
Revolving lines of credit	6,495,256	5,205,040
Revolving lines of credit converted to term loans	66,550	122,881
Total	19,350,920	22,871,961
Commercial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	1,931,716	1,136,399
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	750,858	3,171,323
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	249,461	672,317
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	325,329	365,908
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	358,358	207,885
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	258,173	308,275
Revolving lines of credit	5,005,740	3,984,187
Revolving lines of credit converted to term loans	23,313	51,267
Total	8,902,948	9,897,561
Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	1,903,529	1,133,013
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	671,459	3,157,150
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	244,568	546,520
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	255,444	319,246
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	325,201	200,478
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	244,373	289,795
Revolving lines of credit	4,877,753	3,960,706
Revolving lines of credit converted to term loans	21,063	41,377
Total	8,543,390	9,648,285
Commercial | Special mention
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	9,141	2,650
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	7,740	5,277
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	3,628	23,129
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	37,794	8,697
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	11,998	39
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	4,975	5,322
Revolving lines of credit	95,310	5,120
Revolving lines of credit converted to term loans	2,250	7,883
Total	172,836	58,117
Commercial | Substandard - accruing
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	18,670	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	71,147	7,705
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	514	102,619
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	1,666	25,010
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	14,933	6,202
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	6,305	6,962
Revolving lines of credit	30,070	14,742
Revolving lines of credit converted to term loans	0	2,007
Total	143,305	165,247
Commercial | Non-accrual
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	376	736
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	512	1,191
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	751	49
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	30,425	12,955
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	6,226	1,166
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	2,520	6,196
Revolving lines of credit	2,607	3,619
Revolving lines of credit converted to term loans	0	0
Total	43,417	25,912
Energy
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	124,691	71,750
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	12,517	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	3
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	3,317	15,831
Revolving lines of credit	1,018,771	633,789
Revolving lines of credit converted to term loans	0	0
Total	1,159,296	721,373
Energy | Pass
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	124,691	71,750
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	12,517	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	3
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	3,317	7,188
Revolving lines of credit	1,007,776	577,988
Revolving lines of credit converted to term loans	0	0
Total	1,148,301	656,929
Energy | Special mention
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	0
Revolving lines of credit	0	27,421
Revolving lines of credit converted to term loans	0	0
Total	0	27,421
Energy | Substandard - accruing
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	8,643
Revolving lines of credit	7,337	0
Revolving lines of credit converted to term loans	0	0
Total	7,337	8,643
Energy | Non-accrual
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	0
Revolving lines of credit	3,658	28,380
Revolving lines of credit converted to term loans	0	0
Total	3,658	28,380
Mortgage Finance
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	30,485	289,042
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	482,477	590,616
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	197,045	656,445
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	267,758	754,507
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	464,753	332,001
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	2,647,515	4,852,886
Revolving lines of credit	0	0
Revolving lines of credit converted to term loans	0	0
Total	4,090,033	7,475,497
Mortgage Finance | Pass
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	30,485	289,042
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	482,477	590,616
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	197,045	656,445
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	267,758	754,507
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	464,753	332,001
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	2,647,515	4,852,886
Revolving lines of credit	0	0
Revolving lines of credit converted to term loans	0	0
Total	4,090,033	7,475,497
Mortgage Finance | Special mention
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	0
Revolving lines of credit	0	0
Revolving lines of credit converted to term loans	0	0
Total	0	0
Mortgage Finance | Substandard - accruing
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	0
Revolving lines of credit	0	0
Revolving lines of credit converted to term loans	0	0
Total	0	0
Mortgage Finance | Non-accrual
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	0
Revolving lines of credit	0	0
Revolving lines of credit converted to term loans	0	0
Total	0	0
Real Estate
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	1,437,544	934,008
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,073,010	844,518
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	770,709	769,592
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	550,826	481,616
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	311,001	326,691
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	541,571	762,427
Revolving lines of credit	470,745	587,064
Revolving lines of credit converted to term loans	43,237	71,614
Total	5,198,643	4,777,530
Real Estate | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total	3,552,299
Real Estate | Residential Homebuilder Finance
Financing Receivable, Recorded Investment [Line Items]
Total	519,943
Real Estate | Other Financing Receivable
Financing Receivable, Recorded Investment [Line Items]
Total	803,121
Real Estate | Secured By Family
Financing Receivable, Recorded Investment [Line Items]
Total	323,280
Real Estate | Pass | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	1,085,254	497,462
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	756,180	576,344
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	563,341	600,005
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	447,346	294,005
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	183,634	155,252
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	284,698	451,042
Revolving lines of credit	97,337	73,988
Revolving lines of credit converted to term loans	11,944	25,970
Total	3,429,734	2,674,068
Real Estate | Pass | Residential Homebuilder Finance
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	94,066	155,595
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	70,951	44,362
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	12,161	9,693
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	6,106	8,565
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	2,655	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	12,732
Revolving lines of credit	326,164	460,888
Revolving lines of credit converted to term loans	0	0
Total	512,103	691,835
Real Estate | Pass | Other Financing Receivable
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	182,840	166,202
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	131,538	148,811
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	94,611	119,017
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	67,518	106,343
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	76,951	61,723
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	163,838	139,723
Revolving lines of credit	42,333	47,653
Revolving lines of credit converted to term loans	31,293	29,595
Total	790,922	819,067
Real Estate | Pass | Secured By Family
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	64,050	96,899
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	89,967	60,659
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	53,003	40,586
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	24,314	22,976
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	16,953	31,826
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	70,082	65,910
Revolving lines of credit	4,911	4,535
Revolving lines of credit converted to term loans	0	0
Total	323,280	323,391
Real Estate | Special mention | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	2,765	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	6,524	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	37,791	291
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	5,295	8,827
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	19,350	20,089
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	3,652	26,344
Revolving lines of credit	0	0
Revolving lines of credit converted to term loans	0	0
Total	75,377	55,551
Real Estate | Special mention | Residential Homebuilder Finance
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	0
Revolving lines of credit	0	0
Revolving lines of credit converted to term loans	0	0
Total	0	0
Real Estate | Special mention | Other Financing Receivable
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	729	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	7,365
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	8,721	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	845
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	386	4,982
Revolving lines of credit	0	0
Revolving lines of credit converted to term loans	0	0
Total	9,836	13,192
Real Estate | Special mention | Secured By Family
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	553
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	291
Revolving lines of credit	0	0
Revolving lines of credit converted to term loans	0	0
Total	0	844
Real Estate | Substandard - accruing | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	17,850
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	17,850	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	40,900
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	11,458	37,393
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	17,698	38,188
Revolving lines of credit	0	0
Revolving lines of credit converted to term loans	0	2,308
Total	47,006	136,639
Real Estate | Substandard - accruing | Residential Homebuilder Finance
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	7,840	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	0
Revolving lines of credit	0	0
Revolving lines of credit converted to term loans	0	0
Total	7,840	0
Real Estate | Substandard - accruing | Other Financing Receivable
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	6,424
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	247	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	16,922
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	1,035	20,184
Revolving lines of credit	0	0
Revolving lines of credit converted to term loans	0	0
Total	1,282	43,530
Real Estate | Substandard - accruing | Secured By Family
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	1,203
Revolving lines of credit	0	0
Revolving lines of credit converted to term loans	0	0
Total	0	1,203
Real Estate | Non-accrual | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	182	198
Revolving lines of credit	0	0
Revolving lines of credit converted to term loans	0	0
Total	182	198
Real Estate | Non-accrual | Residential Homebuilder Finance
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	0
Revolving lines of credit	0	0
Revolving lines of credit converted to term loans	0	0
Total	0	0
Real Estate | Non-accrual | Other Financing Receivable
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	1,081	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	2,641
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	1,450
Revolving lines of credit	0	0
Revolving lines of credit converted to term loans	0	13,741
Total	1,081	17,832
Real Estate | Non-accrual | Secured By Family
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	180
Revolving lines of credit	0	0
Revolving lines of credit converted to term loans	0	0
Total	$ 0	$ 180

Loans Held for Investment and_5

Loans Held for Investment and Allowance for Loan Losses - Allowance Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 211,866	$ 254,615
Provision for credit losses on loans	61,472	(29,831)
Charge-offs	23,569	19,597
Recoveries	3,700	6,679
Net charge-offs (recoveries)	19,869	12,918
Ending balance	253,469	211,866
Commercial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	102,202	73,061
Provision for credit losses on loans	51,571	36,733
Charge-offs	17,614	11,987
Recoveries	682	4,395
Net charge-offs (recoveries)	16,932	7,592
Ending balance	136,841	102,202
Energy
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	52,568	84,064
Provision for credit losses on loans	(981)	(27,045)
Charge-offs	5,605	6,418
Recoveries	3,018	1,967
Net charge-offs (recoveries)	2,587	4,451
Ending balance	49,000	52,568
Mortgage Finance
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6,083	4,699
Provision for credit losses on loans	4,662	1,384
Charge-offs	0	0
Recoveries	0	0
Net charge-offs (recoveries)	0	0
Ending balance	10,745	6,083
Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	51,013	92,791
Provision for credit losses on loans	6,220	(40,903)
Charge-offs	350	1,192
Recoveries	0	317
Net charge-offs (recoveries)	350	875
Ending balance	$ 56,883	$ 51,013

Loans Held for Investment and_6

Loans Held for Investment and Allowance for Loan Losses - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision/(benefit) for credit losses	$ 34,000	$ 12,000	$ 22,000	$ (2,000)	$ (10,000)	$ 5,000	$ (19,000)	$ (6,000)	$ 66,000	$ (30,000)	$ 258,000
Net charge-offs (recoveries)									19,869	12,918
Loan balance	19,350,920				22,871,961				19,350,920	22,871,961
Nonaccrual loans that met the criteria for restructured	531				19,400				531	19,400
Criticized
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan balance	$ 513,200				$ 582,900				513,200	582,900
Leveraged Lending
Financing Receivable, Allowance for Credit Losses [Line Items]
Net charge-offs (recoveries)										12,900
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision/(benefit) for credit losses									$ 61,500	$ (29,800)

Loans Held for Investment and_7

Loans Held for Investment and Allowance for Loan Losses - Age Analysis (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	$ 19,350,920	$ 22,871,961
Non-accrual	48,338
Non-accrual With No Allowance	45,134
Non-accrual loans earning interest income on cash basis	2,200	0
Interest income on non-accrual loans	801	624
Interest Income Reversed	1,600	1,200
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	8,902,948	9,897,561
Non-accrual	43,417
Non-accrual With No Allowance	41,476
Energy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	1,159,296	721,373
Non-accrual	3,658
Non-accrual With No Allowance	3,658
Mortgage Finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	4,090,033	7,475,497
Non-accrual	0
Non-accrual With No Allowance	0
Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	5,198,643	$ 4,777,530
Real Estate | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	3,552,299
Non-accrual	182
Non-accrual With No Allowance	0
Real Estate | Residential Homebuilder Finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	519,943
Non-accrual	0
Non-accrual With No Allowance	0
Real Estate | Other Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	803,121
Non-accrual	1,081
Non-accrual With No Allowance	0
Real Estate | Secured By Family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	323,280
Non-accrual	0
Non-accrual With No Allowance	0
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	9,592
30-59 Days Past Due | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	6,714
30-59 Days Past Due | Energy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0
30-59 Days Past Due | Mortgage Finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0
30-59 Days Past Due | Real Estate | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	440
30-59 Days Past Due | Real Estate | Residential Homebuilder Finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0
30-59 Days Past Due | Real Estate | Other Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	2,438
30-59 Days Past Due | Real Estate | Secured By Family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	3,041
60-89 Days Past Due | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	3,041
60-89 Days Past Due | Energy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0
60-89 Days Past Due | Mortgage Finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0
60-89 Days Past Due | Real Estate | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0
60-89 Days Past Due | Real Estate | Residential Homebuilder Finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0
60-89 Days Past Due | Real Estate | Other Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0
60-89 Days Past Due | Real Estate | Secured By Family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0
90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	131
90 Days or More Past Due | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	131
90 Days or More Past Due | Energy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0
90 Days or More Past Due | Mortgage Finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0
90 Days or More Past Due | Real Estate | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0
90 Days or More Past Due | Real Estate | Residential Homebuilder Finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0
90 Days or More Past Due | Real Estate | Other Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0
90 Days or More Past Due | Real Estate | Secured By Family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0
Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	12,764
Total Past Due | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	9,886
Total Past Due | Energy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0
Total Past Due | Mortgage Finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0
Total Past Due | Real Estate | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	440
Total Past Due | Real Estate | Residential Homebuilder Finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0
Total Past Due | Real Estate | Other Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	2,438
Total Past Due | Real Estate | Secured By Family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0
Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	19,289,818
Current | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	8,849,645
Current | Energy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	1,155,638
Current | Mortgage Finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	4,090,033
Current | Real Estate | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	3,551,677
Current | Real Estate | Residential Homebuilder Finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	519,943
Current | Real Estate | Other Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	799,602
Current | Real Estate | Secured By Family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	$ 323,280

Loans Held for Investment and_8

Loans Held for Investment and Allowance for Loan Losses - Details of Recorded Investment (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) loan
Financing Receivable, Modifications [Line Items]
Number of Contracts | loan	1
Balance at Period End | $	$ 531
Extended Maturity
Financing Receivable, Modifications [Line Items]
Number of Contracts | loan	0
Balance at Period End | $	$ 0
Adjusted Payment Schedule
Financing Receivable, Modifications [Line Items]
Number of Contracts | loan	1
Balance at Period End | $	$ 531
Commercial | Commercial Loan
Financing Receivable, Modifications [Line Items]
Number of Contracts | loan	1
Balance at Period End | $	$ 531
Commercial | Extended Maturity | Commercial Loan
Financing Receivable, Modifications [Line Items]
Number of Contracts | loan	0
Balance at Period End | $	$ 0
Commercial | Adjusted Payment Schedule | Commercial Loan
Financing Receivable, Modifications [Line Items]
Number of Contracts | loan	1
Balance at Period End | $	$ 531

Leases - ROU Assets and Lease L

Leases - ROU Assets and Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
ROU assets, finance leases	$ 2,865	$ 259
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
ROU assets, operating leases	$ 79,889	$ 55,330
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Total ROU assets	$ 82,754	$ 55,589
Finance Lease, Liability	$ 2,877	$ 259
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Lease liabilities, operating leases	$ 103,814	$ 69,184
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Total lease liabilities	$ 106,691	$ 69,443

Leases - Narrative (Details)

Leases - Narrative (Details)	Dec. 31, 2022
Lessee, Lease, Description [Line Items]
Term of finance lease contract	2 years
Minimum | Office Space and Bank Branches
Lessee, Lease, Description [Line Items]
Term of operating lease contract	1 year
Maximum | Office Space and Bank Branches
Lessee, Lease, Description [Line Items]
Term of operating lease contract	17 years

Leases - Net lease cost (Detail

Leases - Net lease cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Finance lease cost:
Amortization of ROU assets	$ 1,108	$ 32
Interest on lease liabilities	34	1
Operating lease cost	23,463	15,608
Short-term lease cost	19	19
Variable lease cost	5,122	4,747
Sublease income	(18)	(107)
Net lease cost	29,728	20,299
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	34	1
Operating cash flows from operating leases	21,910	17,666
Financing cash flows from finance leases	1,096	32
ROU assets obtained in exchange for new finance leases	3,714	291
ROU assets obtained in exchange for new operating leases	$ 57,544	$ 2,109

Leases - Other information (Det

Leases - Other information (Details)	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Weighted-average remaining lease term - finance leases, in years	2 years 2 months 12 days	2 years 8 months 12 days
Weighted-average remaining lease term - operating leases, in years	11 years 6 months	5 years 10 months 24 days
Weighted-average discount rate - finance leases	1.74%	0.77%
Weighted-average discount rate - operating leases	4.16%	2.30%

Leases - Maturity of remaining

Leases - Maturity of remaining lease liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Finance Leases
2023	$ 1,367
2024	1,334
2025	237
2026	0
2027	0
2028 and thereafter	0
Total lease payments	2,938
Less: Interest	(61)
Finance Lease, Liability	2,877	$ 259
Operating Leases
2023	16,993
2024	13,130
2025	9,756
2026	10,022
2027	9,921
2028 and thereafter	78,306
Total lease payments	138,128
Less: Interest	(34,314)
Present value of lease liabilities	103,814	$ 69,184
2023	18,360
2024	14,464
2025	9,993
2026	10,022
2027	9,921
2028 and thereafter	78,306
Total lease payments	141,066
Less: Interest	(34,375)
Present value of lease liabilities	$ 106,691

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Goodwill
Gross	$ 1,870	$ 15,468
Accumulated Amortization	(374)	(374)
Net	1,496	15,094
Intangible assets—customer relationships and trademarks
Gross	0	9,006
Accumulated Amortization	0	(6,838)
Finite-Lived Intangible Assets, Net, Total	0	2,168
Goodwill Impaired and Finite-Lived Intangible Assets, Net [Abstract]
Gross	1,870	24,474
Accumulated Amortization	(374)	(7,212)
Net	$ 1,496	$ 17,262

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Thousands		12 Months Ended
	Nov. 01, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Goodwill and Intangible Assets [Line Items]
Amortization expense related to intangible assets		$ 338	$ 405	$ 432
Disposal Group, Held-for-sale, Not Discontinued Operations | BankDirect Capital Finance
Schedule of Goodwill and Intangible Assets [Line Items]
Decrease in intangible assets and goodwill	$ (15,400)

Premises and Equipment (Details

Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Summary of premises and equipment
Premises and equipment, gross	$ 89,511	$ 76,461
Accumulated depreciation	(63,129)	(55,560)
Total premises and equipment, net	26,382	20,901
Depreciation, Depletion and Amortization
Depreciation expense	9,500	8,100	$ 9,500
Premises
Summary of premises and equipment
Premises and equipment, gross	34,930	32,609
Furniture and equipment
Summary of premises and equipment
Premises and equipment, gross	$ 54,581	$ 43,852

Deposits - Schedule of Deposits

Deposits - Schedule of Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Non-interest bearing deposits
Non-interest bearing deposits	$ 9,618,081	$ 13,390,370
Interest bearing deposits:
Transaction	683,562	2,837,521
Savings	11,042,658	10,682,768
Time	1,512,579	1,198,706
Total interest bearing deposits	13,238,799	14,718,995
Total deposits	$ 22,856,880	$ 28,109,365

Deposits - Schedule of Maturiti

Deposits - Schedule of Maturities of Interest-Bearing Time Deposits (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Scheduled maturities of interest bearing time deposits
2023	$ 1,482,377
2024	26,777
2025	3,272
2026	52
2027	101
2028 and after	0
Total	$ 1,512,579

Deposits - Narrative (Details)

Deposits - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Deposits [Abstract]
Interest-bearing time deposits of $250,000 or more	$ 258.4	$ 186

Short-Term Borrowings and Lon_3

Short-Term Borrowings and Long-Term Debt - Summary of Short-Term Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Federal Funds Purchased
Debt Instrument [Line Items]
Amount outstanding at year-end	$ 0	$ 0
Interest rate at year-end	0%	0%
Average balance outstanding during the year	$ 30,741	$ 88,916
Weighted-average interest rate during the year	1.17%	0.15%
Maximum month-end outstanding during the year	$ 525,000	$ 302,301
Customer Repurchase Agreements
Debt Instrument [Line Items]
Amount outstanding at year-end	$ 1,142	$ 2,832
Interest rate at year-end	0.25%	0.25%
Average balance outstanding during the year	$ 1,928	$ 4,199
Weighted-average interest rate during the year	0.28%	0.28%
Maximum month-end outstanding during the year	$ 2,320	$ 5,487
FHLB Borrowings
Debt Instrument [Line Items]
Amount outstanding at year-end	$ 1,200,000	$ 2,200,000
Interest rate at year-end	4.25%	0.13%
Average balance outstanding during the year	$ 1,797,082	$ 2,306,165
Weighted-average interest rate during the year	1.60%	0.19%
Maximum month-end outstanding during the year	$ 2,650,000	$ 2,600,000

Short-Term Borrowings and Lon_4

Short-Term Borrowings and Long-Term Debt - Summary of Long-Term Borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	May 06, 2021	Jan. 31, 2014
Schedule Of Borrowings [Line Items]
Long-term debt	$ 931,442	$ 928,738
Senior Unsecured Credit-Linked Notes, Due 2024
Schedule Of Borrowings [Line Items]
Senior unsecured credit-linked notes	272,492	270,487
5.75% Subordinated Notes, Due 2026
Schedule Of Borrowings [Line Items]
Trust preferred securities issued	174,196	173,935
Interest rate				5.25%
4.00% Subordinated Notes, Due 2031
Schedule Of Borrowings [Line Items]
Trust preferred securities issued	371,348	370,910
Interest rate			4%
Floating Rate Subordinated Debentures, Due 2032 to 2036
Schedule Of Borrowings [Line Items]
Trust preferred securities issued	$ 113,406	$ 113,406

Short-Term Borrowings and Lon_5

Short-Term Borrowings and Long-Term Debt - Preferred Subordinated Debentures (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Texas Capital Statutory Trust I
Subordinated Borrowing [Line Items]
Trust preferred securities issued	$ 10,310
Texas Capital Statutory Trust I | Trust preferred subordinated debentures | LIBOR
Subordinated Borrowing [Line Items]
Interest rate on subordinated debentures	3.35%
Texas Capital Statutory Trust II
Subordinated Borrowing [Line Items]
Trust preferred securities issued	$ 10,310
Texas Capital Statutory Trust II | Trust preferred subordinated debentures | LIBOR
Subordinated Borrowing [Line Items]
Interest rate on subordinated debentures	3.25%
Texas Capital Statutory Trust III
Subordinated Borrowing [Line Items]
Trust preferred securities issued	$ 25,774
Texas Capital Statutory Trust III | Trust preferred subordinated debentures | LIBOR
Subordinated Borrowing [Line Items]
Interest rate on subordinated debentures	1.51%
Texas Capital Statutory Trust IV
Subordinated Borrowing [Line Items]
Trust preferred securities issued	$ 25,774
Texas Capital Statutory Trust IV | Trust preferred subordinated debentures | LIBOR
Subordinated Borrowing [Line Items]
Interest rate on subordinated debentures	1.60%
Texas Capital Statutory Trust V
Subordinated Borrowing [Line Items]
Trust preferred securities issued	$ 41,238
Texas Capital Statutory Trust V | Trust preferred subordinated debentures | LIBOR
Subordinated Borrowing [Line Items]
Interest rate on subordinated debentures	1.71%

Financial Instruments with Of_3

Financial Instruments with Off-Balance Sheet Risk (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Allowance For Off-Balance Sheet Credit Losses [Roll Forward]
Beginning balance of allowance for off-balance sheet credit losses	$ 17,265	$ 17,434
Provision for off-balance sheet credit losses	4,528	(169)
Ending balance of allowance for off-balance sheet credit losses	21,793	17,265
Commitments to extend credit
Allowance For Off-Balance Sheet Credit Losses [Roll Forward]
Off-balance sheet liability	9,673,082	9,445,763
Standby letters of credit
Allowance For Off-Balance Sheet Credit Losses [Roll Forward]
Off-balance sheet liability	$ 417,896	$ 357,672

Regulatory Ratios and Capital -

Regulatory Ratios and Capital - Narrative (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) $ / shares shares	Jan. 18, 2023 USD ($)	Apr. 19, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2009 USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Authorized repurchase amount			$ 150,000
Shares repurchased (in shares) | shares	2,083,118
Shares repurchased	$ 115,302
Shares repurchased, price per share (in dollars per share) | $ / shares	$ 55.35
Assets	$ 28,414,642			$ 34,731,738	$ 15,000,000
Required reserve balance at the Federal Reserve				$ 0
Subsequent Event
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Authorized repurchase amount		$ 150,000
Basel III, Phased-In
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 capital (to average assets) to be well capitalized under prompt corrective action provisions, ratio	0.025

Regulatory Ratios and Capital_2

Regulatory Ratios and Capital - Schedule of Compliance With Regulatory Capital Requirements (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Common Equity Tier 1 [Abstract]
CET1, actual amount	$ 3,180,208	$ 2,949,785
Total capital (to risk-weighted assets):
Total capital (to risk weighted assets), actual amount	4,331,098	4,085,540
Total capital (to risk weighted assets) to be well capitalized under prompt corrective action provisions, amount	2,446,583	2,666,348
Tier 1 capital (to risk-weighted assets):
Tier 1 capital (to risk-weighted assets), actual amount	3,590,208	3,359,785
Tier 1 capital (to risk weighted assets) to be well capitalized under prompt corrective action provisions, amount	1,467,950	1,599,809
Tier 1 capital (to average assets):
Tier 1 capital (to average assets), actual amount	$ 3,590,208	$ 3,359,785
Risk Based Ratios [Abstract]
CET1, actual ratio	13%	11.06%
Total capital (to risk weighted assets), actual ratio	0.1770	0.1532
Total capital (to risk weighted assets) to be well capitalized under prompt corrective action provisions, ratio	0.1000	0.1000
Tier 1 capital (to risk-weighted assets), actual ratio	0.1467	0.1260
Tier 1 capital (to risk weighted assets) to be well capitalized under prompt corrective action provisions, ratio	0.0600	0.0600
Tier 1 capital (to average assets), actual ratio	0.1154	0.0901
Bank
Common Equity Tier 1 [Abstract]
CET1, actual amount	$ 3,408,178	$ 3,013,170
CET1 to be well capitalized under prompt corrective action provisions, amount	1,587,909	1,732,996
Total capital (to risk-weighted assets):
Total capital (to risk weighted assets), actual amount	3,987,720	3,578,014
Total capital (to risk weighted assets) to be well capitalized under prompt corrective action provisions, amount	2,442,937	2,666,148
Tier 1 capital (to risk-weighted assets):
Tier 1 capital (to risk-weighted assets), actual amount	3,568,178	3,173,170
Tier 1 capital (to risk weighted assets) to be well capitalized under prompt corrective action provisions, amount	1,954,349	2,132,918
Tier 1 capital (to average assets):
Tier 1 capital (to average assets), actual amount	3,568,178	3,173,170
Tier 1 capital (to average assets) to be well capitalized under prompt corrective action provisions, amount	$ 1,554,039	$ 1,863,346
Risk Based Ratios [Abstract]
CET1, actual ratio	13.95%	11.30%
CET1 to be well capitalized under prompt corrective action provisions, ratio	6.50%	6.50%
Total capital (to risk weighted assets), actual ratio	0.1632	0.1342
Total capital (to risk weighted assets) to be well capitalized under prompt corrective action provisions, ratio	0.1000	0.1000
Tier 1 capital (to risk-weighted assets), actual ratio	0.1461	0.1190
Tier 1 capital (to risk weighted assets) to be well capitalized under prompt corrective action provisions, ratio	0.0800	0.0800
Tier 1 capital (to average assets), actual ratio	0.1148	0.0851
Tier 1 capital (to average assets) to be well capitalized under prompt corrective action provisions, ratio	0.0500	0.0500
Basel III, Phase-In Schedule
Common Equity Tier 1 [Abstract]
CET1 for capital adequacy purposes, amount	$ 1,712,608	$ 1,866,444
Total capital (to risk-weighted assets):
Total capital (to risk weighted assets) for capital adequacy purposes, amount	2,568,912	2,799,666
Tier 1 capital (to risk-weighted assets):
Tier 1 capital (to risk-weighted assets) for capital adequacy purposes, amount	2,079,595	2,266,396
Tier 1 capital (to average assets):
Tier 1 capital (to average assets) for capital adequacy purposes, amount	$ 1,244,494	$ 1,490,902
Risk Based Ratios [Abstract]
CET1 for capital adequacy purposes, ratio	7%	7%
Total capital (to risk weighted assets) for capital adequacy purposes, ratio	0.1050	0.1050
Tier 1 capital (to risk-weighted assets) for capital adequacy purposes, ratio	0.0850	0.0850
Tier 1 capital (to average assets) for capital adequacy purposes, ratio	0.0400	0.0400
Basel III, Phase-In Schedule | Bank
Common Equity Tier 1 [Abstract]
CET1 for capital adequacy purposes, amount	$ 1,710,056	$ 1,866,303
Total capital (to risk-weighted assets):
Total capital (to risk weighted assets) for capital adequacy purposes, amount	2,565,083	2,799,455
Tier 1 capital (to risk-weighted assets):
Tier 1 capital (to risk-weighted assets) for capital adequacy purposes, amount	2,076,496	2,266,225
Tier 1 capital (to average assets):
Tier 1 capital (to average assets) for capital adequacy purposes, amount	$ 1,243,232	$ 1,490,677
Risk Based Ratios [Abstract]
CET1 for capital adequacy purposes, ratio	7%	7%
Total capital (to risk weighted assets) for capital adequacy purposes, ratio	0.1050	0.1050
Tier 1 capital (to risk-weighted assets) for capital adequacy purposes, ratio	0.0850	0.0850
Tier 1 capital (to average assets) for capital adequacy purposes, ratio	0.0400	0.0400

Stock-Based Compensation and _3

Stock-Based Compensation and Employee Benefits - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employer contribution	$ 13,300,000	$ 10,200,000	$ 10,300,000
Employer discretionary contributions	$ 0	274,000	1,000,000
Eligible employee contribution, minimum (in percent)	1%
Eligible employee contribution, maximum (in percent)	10%
Number of shares authorized under the plan	1,400,000
Number of shares available to be issued under the plan	1,143,773
Compensation expense	$ 0	1,000	26,000
Compensation cost for all share-based arrangements, net of taxes	$ 21,200,000	$ 30,100,000	15,700,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Cash based performance
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of cash-based performance units outstanding	0
Number of cash-based performance units issued in period	0	0
Cash-based compensation expense	$ 186,000	$ 1,300,000	1,800,000
Stock appreciation rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	5 years
Compensation expense	$ 0	$ 0	$ 0
Minimum | Time-based RSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Minimum | Time and performance-based RSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Maximum | Time-based RSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	5 years
Maximum | Time and performance-based RSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	4 years
2006 ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized under the plan	400,000
Number of shares purchased under the plan	184,263	164,033	155,933

Stock-Based Compensation and _4

Stock-Based Compensation and Employee Benefits - Schedule of Stock Appreciation Rights Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Additional Information:
Compensation expense	$ 0	$ 1,000	$ 26,000
SARs
SARs
Outstanding at beginning of year (in shares)	3,000	12,400	21,200
Exercised (in shares)	(3,000)	(9,400)	(8,800)
Outstanding at year-end (in shares)	0	3,000	12,400
Weighted Average Exercise Price
SARs outstanding at beginning of year, weighted average exercise price	$ 44.20	$ 43.48	$ 33.95
SARs exercised, weighted average exercise price	44.20	43.24	20.52
SARs outstanding at year end, weighted average exercise price	$ 0	$ 44.20	$ 43.48
Additional Information:
Vested and exercisable at year-end	0	3,000	12,400
SARs vested and exercisable at year end, weighted average exercise price	$ 0	$ 44.20	$ 43.48
Weighted average remaining contractual life of vested (in years)	0 years	1 year 7 months 28 days	2 years 3 months 3 days
Weighted average remaining contractual life of SARs (in years)	0 years	1 year 7 months 28 days	2 years 3 months 3 days
Compensation expense	$ 0	$ 0	$ 0
Unrecognized compensation expense	0	0	0
Intrinsic value of exercised	$ 64,000	$ 302,000	$ 294,000

Stock-Based Compensation and _5

Stock-Based Compensation and Employee Benefits - Summary of Status and Changes in Nonvested Restricted Stock Units (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Weighted- Average Grant- Date Fair Value
Compensation expense	$ 0	$ 1,000	$ 26,000
RSUs
Number of Shares
Outstanding at beginning of year (in shares)	1,206,862	955,594	558,312
Granted (in shares)	454,314	677,472	631,092
Exercised (in shares)	(308,771)	(187,530)	(171,494)
Forfeited (in shares)	(196,753)	(238,674)	(62,316)
Outstanding at year-end (in shares)	1,155,652	1,206,862	955,594
Weighted- Average Grant- Date Fair Value
Balance at beginning of year, weighted average grant-date fair value	$ 56.06	$ 48.76	$ 64.95
Granted, weighted average grant-date fair value	68.15	66.31	39.37
RSUs exercised	54.51	58.82	65.17
Forfeited, weighted average grant-date fair value	58.42	53.76	56.92
Balance at year end, weighted average grant-date fair value	$ 61.12	$ 56.06	$ 48.76
Compensation expense	$ 21,246,000	$ 30,060,000	$ 15,655,000
Unrecognized compensation expense	$ 32,148,000	$ 32,525,000	$ 29,146,000
Weighted average period over which unrecognized compensation expense is expected to be recognized (in years)	2 years 3 months 21 days	2 years 9 months 14 days	2 years 9 months 29 days

Income Taxes - Income Tax Expen

Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current:
Federal									$ 109,370	$ 97,608	$ 32,701
State									7,302	6,761	920
Total									116,672	104,369	33,621
Deferred:
Federal									(16,178)	(19,020)	(7,964)
State									(1,217)	(1,233)	0
Total									(17,395)	(20,253)	(7,964)
Total expense:
Federal									93,192	78,588	24,737
State									6,085	5,528	920
Income tax expense	$ 60,931	$ 13,948	$ 11,311	$ 13,087	$ 23,712	$ 13,938	$ 23,555	$ 22,911	$ 99,277	$ 84,116	$ 25,657

Income Taxes - Effective Income

Income Taxes - Effective Income Tax Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Amount
U.S. statutory rate									$ 90,669	$ 70,992	$ 19,309
State taxes									6,822	4,108	726
Tax-exempt income									(1,061)	(1,855)	(3,356)
Tax credits									(128)	(179)	(1,216)
Disallowed FDIC									1,491	2,936	3,920
Disallowed compensation									2,771	6,377	3,098
Other									(1,287)	1,737	3,176
Income tax expense	$ 60,931	$ 13,948	$ 11,311	$ 13,087	$ 23,712	$ 13,938	$ 23,555	$ 22,911	$ 99,277	$ 84,116	$ 25,657
Rate
U.S. statutory rate									21%	21%	21%
State taxes									2%	1%	1%
Tax-exempt income									0%	(1.00%)	(4.00%)
Tax credits									0%	0%	(1.00%)
Disallowed FDIC									0%	1%	4%
Disallowed compensation									1%	2%	3%
Other									(1.00%)	1%	4%
Total									23%	25%	28%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unrecognized tax benefits	$ 889	$ 722	$ 1,100
Allowance for credit losses	$ 62,154	$ 51,738

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Asset (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Allowance for credit losses	$ 62,154	$ 51,738
Lease liabilities	24,091	15,615
Loan origination fees	14,385	11,204
Stock compensation	5,031	4,649
Non-accrual interest	1,132	1,874
Non-qualified deferred compensation	4,782	6,705
Net unrealized losses in AOCI	111,365	12,684
Other	4,678	1,671
Total deferred tax assets	227,618	106,140
Deferred tax liabilities:
Loan origination costs	(3,217)	(3,110)
Leases	(12,863)	(8,414)
Lease ROU assets	(19,807)	(14,266)
Depreciation	(9,034)	(10,567)
Other	(284)	(3,446)
Total deferred tax liabilities	(45,205)	(39,803)
Net deferred tax asset	$ 182,413	$ 66,337

Fair Value Disclosures - Schedu

Fair Value Disclosures - Schedule of Assets and Liabilities Measured At Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	$ 2,615,644	$ 3,538,201
Equity securities	33,956	45,607
Derivative assets	13,504	37,788
Derivative liabilities	91,758	37,788
US Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	670,582
U.S. government agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	102,154	120,944
Tax-exempt asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0	180,033
CRT securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	11,861	11,846
Fair value measurements, recurring basis | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	22,879	33,589
Loans held for sale		0
Derivative assets	0	0
Derivative liabilities	0	0
Non-qualified deferred compensation plan liabilities	21,177	29,695
Fair value measurements, recurring basis | Level 1 | US Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	670,582
Fair value measurements, recurring basis | Level 1 | U.S. government agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0	0
Fair value measurements, recurring basis | Level 1 | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0	0
Fair value measurements, recurring basis | Level 1 | Tax-exempt asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities		0
Fair value measurements, recurring basis | Level 1 | CRT securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0	0
Fair value measurements, recurring basis | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	11,077	12,018
Loans held for sale		465
Derivative assets	13,504	37,788
Derivative liabilities	91,758	37,788
Non-qualified deferred compensation plan liabilities	0	0
Fair value measurements, recurring basis | Level 2 | US Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0
Fair value measurements, recurring basis | Level 2 | U.S. government agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	102,154	120,944
Fair value measurements, recurring basis | Level 2 | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	1,831,047	3,225,378
Fair value measurements, recurring basis | Level 2 | Tax-exempt asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities		0
Fair value measurements, recurring basis | Level 2 | CRT securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0	0
Fair value measurements, recurring basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	0	0
Loans held for sale		7,658
Derivative assets	0	0
Derivative liabilities	0	0
Non-qualified deferred compensation plan liabilities	0	0
Fair value measurements, recurring basis | Level 3 | US Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0
Fair value measurements, recurring basis | Level 3 | U.S. government agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0	0
Fair value measurements, recurring basis | Level 3 | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0	0
Fair value measurements, recurring basis | Level 3 | Tax-exempt asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities		180,033
Fair value measurements, recurring basis | Level 3 | CRT securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	$ 11,861	$ 11,846

Fair Value Disclosures - Level

Fair Value Disclosures - Level 3 Fair Value Assets Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Period	$ 7,658	$ 6,933
Purchases / Additions	1,569	2,125
Sales / Reductions	(8,132)	(1,428)
Realized	(1,095)	5
Unrealized	0	23
Balance at End of Period	$ 0	$ 7,658
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration]	Net gain/(loss) on sale of loans held for sale	Net gain/(loss) on sale of loans held for sale
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Net gain/(loss) on sale of loans held for sale	Net gain/(loss) on sale of loans held for sale
Tax-exempt asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Period	$ 180,033	$ 199,176
Purchases / Additions	0	0
Sales / Reductions	(170,626)	(14,314)
Realized	0	0
Unrealized	(9,407)	(4,829)
Balance at End of Period	$ 0	$ 180,033
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration]	Accumulated other comprehensive loss, net of taxes	Accumulated other comprehensive loss, net of taxes
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other	Noninterest Income, Other
CRT securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Period	$ 11,846	$ 11,417
Purchases / Additions	0	0
Sales / Reductions	0	0
Realized	0	0
Unrealized	15	429
Balance at End of Period	$ 11,861	$ 11,846
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration]	Accumulated other comprehensive loss, net of taxes	Accumulated other comprehensive loss, net of taxes
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other	Noninterest Income, Other

Fair Value Disclosures - Narrat

Fair Value Disclosures - Narrative (Details)	Dec. 31, 2022	Dec. 31, 2021
CRT securities | Minimum
Fair Value Assets Measured On Non Recurring Basis Unobservable Input Reconciliation [Line Items]
Debt securities, available-for-sale, term	5 years 21 days
CRT securities | Maximum
Fair Value Assets Measured On Non Recurring Basis Unobservable Input Reconciliation [Line Items]
Debt securities, available-for-sale, term	8 years 8 months 1 day
Measurement Input, Discount Rate
Fair Value Assets Measured On Non Recurring Basis Unobservable Input Reconciliation [Line Items]
Loans held-for-sale, measurement input	0	0.978
Measurement Input, Discount Rate | Tax-exempt asset-backed securities | Weighted Average
Fair Value Assets Measured On Non Recurring Basis Unobservable Input Reconciliation [Line Items]
Debt securities, available-for-sale, measurement input		0.0260
Debt securities, available-for-sale, term		4 years 7 months 9 days
Measurement Input, Discount Rate | CRT securities | Minimum
Fair Value Assets Measured On Non Recurring Basis Unobservable Input Reconciliation [Line Items]
Debt securities, available-for-sale, measurement input	0.0667
Measurement Input, Discount Rate | CRT securities | Maximum
Fair Value Assets Measured On Non Recurring Basis Unobservable Input Reconciliation [Line Items]
Debt securities, available-for-sale, measurement input	0.1137
Measurement Input, Discount Rate | CRT securities | Weighted Average
Fair Value Assets Measured On Non Recurring Basis Unobservable Input Reconciliation [Line Items]
Debt securities, available-for-sale, measurement input	0.0824	0.0497
Debt securities, available-for-sale, term	6 years 3 months 3 days	6 years 4 months 6 days

Fair Value Disclosures - Summar

Fair Value Disclosures - Summary of the Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale debt securities	$ 2,615,644	$ 3,538,201
Held-to-maturity debt securities	935,514	0
Equity securities	33,956	45,607
Derivative assets	13,504	37,788
Long-term debt	931,442	928,738
Derivative liabilities	91,758	37,788
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	5,012,260	7,946,659
Available-for-sale debt securities	2,615,644	3,538,201
Held-to-maturity debt securities	935,514
Equity securities	33,956	45,607
Loans held for sale	36,357	8,123
Loans held for investment, net	19,033,871	22,595,088
Derivative assets	13,504	37,788
Total deposits	22,856,880	28,109,365
Short-term borrowings	1,201,142	2,202,832
Long-term debt	931,442	928,738
Derivative liabilities	91,758	37,788
Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	5,012,260	7,946,659
Available-for-sale debt securities	2,615,644	3,538,201
Held-to-maturity debt securities	816,914
Equity securities	33,956	45,607
Loans held for sale	36,357	8,123
Loans held for investment, net	18,969,922	22,631,252
Derivative assets	13,504	37,788
Total deposits	22,857,949	28,109,762
Short-term borrowings	1,201,142	2,202,832
Long-term debt	881,716	952,404
Derivative liabilities	91,758	37,788
Level 1 | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	5,012,260	7,946,659
Available-for-sale debt securities	670,582
Equity securities	22,879	33,589
Level 2 | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale debt securities	1,933,201	3,346,322
Held-to-maturity debt securities	816,914
Equity securities	11,077	12,018
Loans held for sale		465
Derivative assets	13,504	37,788
Short-term borrowings	1,201,142	2,202,832
Long-term debt	881,716	952,404
Derivative liabilities	91,758	37,788
Level 3 | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale debt securities	11,861	191,879
Loans held for sale	36,357	7,658
Loans held for investment, net	18,969,922	22,631,252
Total deposits	$ 22,857,949	$ 28,109,762

Derivative Financial Instrume_3

Derivative Financial Instruments - Schedule of Derivative Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Estimated fair value, asset derivative	$ 90,543	$ 41,016
Estimated fair value, liability derivative	176,543	41,016
Offsetting derivative liabilities	(5,164)	(3,228)
Offsetting derivative assets	(5,164)	(3,228)
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset	(71,875)	0
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset	(79,621)	0
Net asset derivatives included in the consolidated balance sheets	13,504	37,788
Net liability derivatives included in the consolidated balance sheets	$ 91,758	$ 37,788
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Non-hedging derivatives | Commercial loan/lease interest rate swaps | Customer-Initiated and Other Derivatives
Derivative [Line Items]
Residential MSRs, notional amount	$ 4,396,367	$ 3,536,090
Estimated fair value, asset derivative	83,529	40,922
Estimated fair value, liability derivative	83,529	40,922
Non-hedging derivatives | Interest Rate Caps and Floors, Written | Customer-Initiated and Other Derivatives
Derivative [Line Items]
Residential MSRs, notional amount	220,142	191,291
Estimated fair value, asset derivative	0	94
Estimated fair value, liability derivative	2,583	0
Non-hedging derivatives | Interest Rate Caps and Floors, Purchased | Customer-Initiated and Other Derivatives
Derivative [Line Items]
Residential MSRs, notional amount	220,142	191,291
Estimated fair value, asset derivative	2,583	0
Estimated fair value, liability derivative	0	94
Non-hedging derivatives | Forward sale commitments | Customer-Initiated and Other Derivatives
Derivative [Line Items]
Residential MSRs, notional amount	1,569,326	0
Estimated fair value, asset derivative	4,431	0
Estimated fair value, liability derivative	4,053	0
Designated as Hedging Instrument | Commercial loan/lease interest rate swaps | Cash Flow Hedging
Derivative [Line Items]
Residential MSRs, notional amount	3,000,000	0
Estimated fair value, asset derivative	0	0
Estimated fair value, liability derivative	$ 86,378	$ 0

Derivative Financial Instrume_4

Derivative Financial Instruments Derivative Financial Instruments - Narrative (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) instrument	Dec. 31, 2021 USD ($) instrument
Derivative [Line Items]
Cash collateral pledged for derivatives	$ 89,200,000	$ 40,300,000
CashCollateralPostedForDerivativesInLiabilityPosition	$ 72,500,000	$ 0
Risk participation agreement - participant bank
Derivative [Line Items]
Instruments held | instrument	19	7
Non-hedging derivatives, notional amoount	$ 291,200,000	$ 79,200,000
Maximum exposure	$ 8,900,000	$ 2,300,000
Risk participation agreement - lead bank
Derivative [Line Items]
Instruments held | instrument	18	15
Non-hedging derivatives, notional amoount	$ 222,000,000	$ 156,100,000
Interest rate contract
Derivative [Line Items]
Unrealized losses, net of tax to AOCI	85,800,000
Amount reclassified from AOCI into interest income on loans	1,800,000
Amount reclassified from AOCI as a decrease to interest income	$ 50,900,000
Maximum period to hedge forecasted transactions	3 years 9 months
Loans Receivable | Not Designated as Hedging Instrument
Derivative [Line Items]
Credit risk exposure, net of collateral pledged, relating to derivatives	$ 13,500,000	$ 37,800,000

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 3,209,616	$ 2,871,224	$ 2,801,321
Change in unrealized gain/(loss)	(479,814)	(80,366)	8,639
Amounts reclassified into net income	9,905	0	0
Other comprehensive income/(loss)	(469,909)	(80,366)	8,639
Income tax expense/(benefit)	(98,681)	(16,877)	1,815
Other comprehensive income/(loss), net of tax	(371,228)	(63,489)	6,824
Ending balance	3,055,351	3,209,616	2,871,224
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	0	0
Change in unrealized gain/(loss)	(85,846)	0
Amounts reclassified into net income	1,803	0
Other comprehensive income/(loss)	(84,043)	0
Income tax expense/(benefit)	(17,649)	0
Other comprehensive income/(loss), net of tax	(66,394)	0
Ending balance	(66,394)	0	0
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(47,715)	15,774
Change in unrealized gain/(loss)	(324,803)	(80,366)
Amounts reclassified into net income	0	0
Other comprehensive income/(loss)	(324,803)	(80,366)
Income tax expense/(benefit)	(68,209)	(16,877)
Other comprehensive income/(loss), net of tax	(256,594)	(63,489)
Ending balance	(304,309)	(47,715)	15,774
AOCI, Accumulated Gain (Loss), Debt Securities, Held-to-Maturity, Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	0	0
Change in unrealized gain/(loss)	(69,165)	0
Amounts reclassified into net income	8,102	0
Other comprehensive income/(loss)	(61,063)	0
Income tax expense/(benefit)	(12,823)	0
Other comprehensive income/(loss), net of tax	(48,240)	0
Ending balance	(48,240)	0	0
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(47,715)	15,774	8,950
Ending balance	$ (418,943)	$ (47,715)	$ 15,774

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Related Party Transactions [Abstract]
Deposits from related parties	$ 23.1	$ 10.2

Parent Company Only - Balance S

Parent Company Only - Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2009
Assets
Other assets	$ 719,162	$ 559,897
Total assets	28,414,642	34,731,738			$ 15,000,000
Liabilities:
Long-term debt	931,442	928,738
Total liabilities	25,359,291	31,522,122
Stockholders’ Equity:
Preferred stock	300,000	300,000
Common stock	509	506
Additional paid-in capital	1,025,593	1,008,559
Retained earnings	2,263,502	1,948,274
Treasury stock	(115,310)	(8)
Accumulated other comprehensive income/(loss)	(418,943)	(47,715)
Total stockholders’ equity	3,055,351	3,209,616	$ 2,871,224	$ 2,801,321
Total liabilities and stockholders’ equity	28,414,642	34,731,738
Texas Capital Bancshares, Inc.
Assets
Cash and cash equivalents	245,777	438,761
Investment in subsidiaries	3,183,767	3,155,954
Other assets	93,395	91,301
Total assets	3,522,939	3,686,016
Liabilities:
Other liabilities	6,754	3,668
Long-term debt	484,754	484,316
Total liabilities	491,508	487,984
Stockholders’ Equity:
Preferred stock	300,000	300,000
Common stock	509	506
Additional paid-in capital	1,025,593	1,018,711
Retained earnings	2,239,582	1,926,538
Treasury stock	(115,310)	(8)
Accumulated other comprehensive income/(loss)	(418,943)	(47,715)
Total stockholders’ equity	3,031,431	3,198,032
Total liabilities and stockholders’ equity	$ 3,522,939	$ 3,686,016

Parent Company Only - Statement

Parent Company Only - Statement of Earnings (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Earnings
Interest on notes receivable									$ 983,787	$ 820,532	$ 993,670
Interest expense	$ 123,687	$ 82,991	$ 36,818	$ 24,983	$ 25,860	$ 26,053	$ 27,496	$ 28,339	268,479	107,748	188,086
Salaries and benefits									436,809	350,930	340,529
Legal and professional									75,858	41,152	52,132
Other non-interest expense									54,658	39,715	41,809
Income tax benefit	(60,931)	(13,948)	(11,311)	(13,087)	(23,712)	(13,938)	(23,555)	(22,911)	(99,277)	(84,116)	(25,657)
Net income	217,251	41,418	34,159	39,650	65,130	43,390	73,481	71,938	332,478	253,939	66,289
Preferred stock dividends	4,312	4,313	4,312	4,313	4,313	4,312	6,317	3,779	17,250	18,721	9,750
Net income available to common stockholders	$ 212,939	$ 37,105	$ 29,847	$ 35,337	$ 60,817	$ 39,078	$ 67,164	$ 68,159	315,228	235,218	56,539
Texas Capital Bancshares, Inc.
Statement of Earnings
Interest on notes receivable									3,250	3,404	3,402
Dividend income									10,529	10,472	10,496
Other income									9	5	3
Total income									13,788	13,881	13,901
Interest expense									19,721	15,946	10,515
Salaries and benefits									782	720	725
Legal and professional									1,583	1,803	3,238
Other non-interest expense									1,636	4,375	4,553
Total expense									23,722	22,844	19,031
Loss before income taxes and equity in undistributed income of subsidiary									(9,934)	(8,963)	(5,130)
Income tax benefit									2,282	2,179	1,135
Income before income taxes									(7,652)	(6,784)	(3,995)
Equity in undistributed income of subsidiary									337,946	258,539	68,100
Net income									330,294	251,755	64,105
Preferred stock dividends									17,250	18,721	9,750
Net income available to common stockholders									$ 313,044	$ 233,034	$ 54,355

Parent Company Only - Stateme_2

Parent Company Only - Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating activities
Net income	$ 217,251	$ 41,418	$ 34,159	$ 39,650	$ 65,130	$ 43,390	$ 73,481	$ 71,938	$ 332,478	$ 253,939	$ 66,289
Adjustments to reconcile net income to net cash provided by/(used in) operating activities:
Accrued interest receivable and other assets									(25,482)	154,114	10,654
Accrued interest payable and other liabilities									2,518	(70,154)	5,749
Net cash provided by operating activities									147,970	657,315	2,639,869
Investing Activities
Net cash provided by/(used in) investing activities									3,308,567	1,232,786	(2,935,317)
Financing Activities
Net proceeds from issuance of preferred stock									0	289,723	0
Redemption of preferred stock									0	(150,000)	0
Preferred stock dividends paid									(17,250)	(18,721)	(9,750)
Repurchase of common stock									(115,302)	0	0
Redemption of long-term debt									0	(111,000)	0
Net proceeds from issuance of long-term debt									0	639,440	0
Net cash provided by/(used in) financing activities									(6,390,936)	(3,149,822)	5,076,245
Net increase/(decrease) in cash and cash equivalents									(2,934,399)	(1,259,721)	4,780,797
Cash and cash equivalents at beginning of period				7,946,659				9,206,380	7,946,659	9,206,380	4,425,583
Cash and cash equivalents at end of period	5,012,260				7,946,659				5,012,260	7,946,659	9,206,380
Texas Capital Bancshares, Inc.
Operating activities
Net income									330,294	251,755	64,105
Adjustments to reconcile net income to net cash provided by/(used in) operating activities:
Equity in undistributed income of subsidiary									(337,946)	(258,539)	(68,100)
Amortization expense									438	2,469	101
Accrued interest receivable and other assets									(2,095)	(1,750)	(912)
Accrued interest payable and other liabilities									3,086	2,348	(448)
Net cash provided by operating activities									(6,223)	(3,717)	(5,254)
Investing Activities
Net decrease in loans held for investment									0	7,500	3,000
Investments in and advances to subsidiaries									(50,000)	0	0
Net cash provided by/(used in) investing activities									(50,000)	7,500	3,000
Financing Activities
Issuance of stock related to stock-based awards									(4,209)	(3,121)	(1,986)
Net proceeds from issuance of preferred stock									0	289,723	0
Redemption of preferred stock									0	(150,000)	0
Preferred stock dividends paid									(17,250)	(18,721)	(9,750)
Repurchase of common stock									(115,302)	0	0
Redemption of long-term debt									0	(111,000)	0
Net proceeds from issuance of long-term debt									0	370,625	0
Net cash provided by/(used in) financing activities									(136,761)	377,506	(11,736)
Net increase/(decrease) in cash and cash equivalents									(192,984)	381,289	(13,990)
Cash and cash equivalents at beginning of period				$ 438,761				$ 57,472	438,761	57,472	71,462
Cash and cash equivalents at end of period	$ 245,777				$ 438,761				$ 245,777	$ 438,761	$ 57,472

Material Transactions Affecti_2

Material Transactions Affecting Stockholders' Equity (Details) - USD ($)		12 Months Ended
	Mar. 03, 2021	Dec. 31, 2022	Dec. 31, 2021	Jan. 18, 2023	Apr. 19, 2022
Equity Distribution Agreement [Line Items]
Authorized repurchase amount					$ 150,000,000
Shares repurchased (in shares)		2,083,118
Shares repurchased		$ 115,302,000
Shares repurchased, price per share (in dollars per share)		$ 55.35
Preferred stock, liquidation value (in usd per share)		$ 1,000	$ 1,000
Issuance of preferred stock			$ 289,723,000
Par value of preferred stock (in usd per share)		$ 0.01	$ 0.01
Subsequent Event
Equity Distribution Agreement [Line Items]
Authorized repurchase amount				$ 150,000,000
Series B Preferred Stock
Equity Distribution Agreement [Line Items]
Preferred stock, dividend rate, percentage	5.75%
Preferred stock, liquidation value (in usd per share)	$ 1,000
Issuance of preferred stock		$ 289,700,000
Depository Shares
Equity Distribution Agreement [Line Items]
Preferred stock, liquidation value (in usd per share)	$ 25
Issuance of preferred stock (in shares)	12,000,000
Series A Preferred Stock
Equity Distribution Agreement [Line Items]
Preferred stock, dividend rate, percentage		6.50%
Par value of preferred stock (in usd per share)		$ 0.01

Quarterly Financial Data (Detai

Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Selected Quarterly Financial Information [Abstract]
Interest income	$ 371,287	$ 322,071	$ 242,349	$ 208,530	$ 219,892	$ 216,589	$ 216,953	$ 223,151	$ 1,144,237	$ 876,585	$ 1,039,407
Interest expense	123,687	82,991	36,818	24,983	25,860	26,053	27,496	28,339	268,479	107,748	188,086
Net interest income	247,600	239,080	205,531	183,547	194,032	190,536	189,457	194,812	875,758	768,837	851,321
Provision/(benefit) for credit losses	34,000	12,000	22,000	(2,000)	(10,000)	5,000	(19,000)	(6,000)	66,000	(30,000)	258,000
Net interest income after provision for credit losses	213,600	227,080	183,531	185,547	204,032	185,536	208,457	200,812	809,758	798,837	593,321
Non-interest income	277,672	25,333	26,242	20,282	31,459	24,779	37,639	44,353	349,529	138,230	202,981
Non-interest expense	213,090	197,047	164,303	153,092	146,649	152,987	149,060	150,316	727,532	599,012	704,356
Income before income taxes	278,182	55,366	45,470	52,737	88,842	57,328	97,036	94,849	431,755	338,055	91,946
Income tax expense	60,931	13,948	11,311	13,087	23,712	13,938	23,555	22,911	99,277	84,116	25,657
Net income	217,251	41,418	34,159	39,650	65,130	43,390	73,481	71,938	332,478	253,939	66,289
Preferred stock dividends	4,312	4,313	4,312	4,313	4,313	4,312	6,317	3,779	17,250	18,721	9,750
Net income available to common stockholders	$ 212,939	$ 37,105	$ 29,847	$ 35,337	$ 60,817	$ 39,078	$ 67,164	$ 68,159	$ 315,228	$ 235,218	$ 56,539
Basic earnings per share
Basic earnings per common share	$ 4.28	$ 0.74	$ 0.59	$ 0.70	$ 1.20	$ 0.76	$ 1.31	$ 1.33	$ 6.25	$ 4.65	$ 1.12
Diluted earnings per share
Diluted earnings per common share	$ 4.23	$ 0.74	$ 0.59	$ 0.69	$ 1.19	$ 0.76	$ 1.31	$ 1.33	$ 6.18	$ 4.60	$ 1.12