Enterprise Financial Services (EFSC) 10-K 25 Feb 22 2021 FY Annual report Financial data

Document and Entity Information

Document and Entity Information Document - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Feb. 24, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Document Transition Report	false
Entity File Number	001-15373
Entity Registrant Name	ENTERPRISE FINANCIAL SERVICES CORP
Entity Central Index Key	0001025835
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	43-1706259
Entity Address, Address Line One	150 North Meramec Avenue
Entity Address, City or Town	Clayton
Entity Address, State or Province	MO
Entity Address, Postal Zip Code	63105
City Area Code	314
Local Phone Number	725-5500
Title of 12(b) Security	Common Stock, par value $.01 per share
Trading Symbol	EFSC
Security Exchange Name	NASDAQ
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
Entity Shell Company	false
Entity Public Float			$ 1,535,891
Entity Common Stock, Shares Outstanding		37,821,174
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCE Portions of our Annual Report on Form 10-K for the fiscal year ended December 31, 2020 are incorporated by reference into Item 7 of this Annual Report on Form 10-K. Additionally, the information required by Items 10, 11, 12, 13 and 14 of Part III of this Annual Report on Form 10-K is incorporated by reference to the Registrant’s Definitive Proxy Statement for its 2022 Annual Meeting of Shareholders, which will be filed pursuant to Regulation 14A under the Securities Exchange Act of 1934, as amended.
ICFR Auditor Attestation Flag	true

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2021
Audit Information [Abstract]
Auditor Firm ID	34
Auditor Name	Deloitte & Touche LLP
Auditor Location	St. Louis, Missouri

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets
Cash and due from banks	$ 209,177	$ 99,760
Federal funds sold	1,356	1,519
Interest-earning deposits (including $14,595 and $36,525 pledged as collateral, respectively)	1,811,156	436,424
Total cash and cash equivalents	2,021,689	537,703
Interest-earning deposits greater than 90 days	6,996	7,626
Securities available-for-sale	1,366,006	912,429
debt securities, held to maturity, net of alloawance for credit losses	429,681	487,610
Trade and Loans Receivables Held-for-sale, Net, Not Part of Disposal Group	6,389	13,564
Loans	9,017,642	7,224,935
Allowance for credit losses on loans	(145,041)	(136,671)
Total loans, net	8,872,601	7,088,264
Other investments	59,896	48,764
Fixed assets, net	47,915	53,169
Goodwill	365,164	260,567
Intangible assets, net	22,286	23,084
Other assets	338,735	318,791
Total assets	13,537,358	9,751,571
Liabilities and Shareholders' equity
Noninterest-bearing demand accounts	4,578,436	2,711,828
Interest-bearing demand accounts	2,465,884	1,768,497
Money market accounts	2,890,976	2,327,066
Savings accounts	800,210	627,903
Certificates of deposit:
Brokered	128,970	50,209
Other	479,323	499,886
Total deposits	11,343,799	7,985,389
Subordinated debentures and notes	154,899	203,637
FHLB advances	50,000	50,000
Other borrowings	353,863	301,081
Other liabilities	105,681	132,489
Total liabilities	12,008,242	8,672,596
Shareholders' equity:
Preferred stock, $0.01 par value; 5,000,000 shares authorized; 75,000 and 0 shares issued and outstanding, respectively ($1,000 per share liquidation preference)	71,988	0
Common stock, $0.01 par value; 75,000,000 and 45,000,000 shares authorized; 39,799,615 and 33,190,306 shares issued, respectively	398	332
Treasury stock, at cost; 1,980,093 shares	(73,528)	(73,528)
Additional paid in capital	1,018,799	697,839
Retained earnings	492,682	417,212
Accumulated other comprehensive income	18,777	37,120
Total shareholders' equity	1,529,116	1,078,975
Total liabilities and shareholders' equity	$ 13,537,358	$ 9,751,571

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets
Collateral pledged	$ 36,525	$ 36,525
State Tax Credits Held For Sale, Fair Value Disclosure	$ 0	$ 0
Shareholders' equity:
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	75,000	0
Preferred stock, shares outstanding	75,000	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	45,000,000	45,000,000
Common stock, shares issued	33,190,306	33,190,306
Treasury stock, shares	1,980,093	1,980,093

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Interest income:
Loans	$ 348,615	$ 270,238	$ 269,406
Debt securities:
Taxable	18,030	24,629	29,030
Nontaxable	13,814	8,397	3,515
Interest-earning deposits	1,496	620	2,128
Dividends on equity securities	1,275	895	1,055
Total interest income	383,230	304,779	305,134
Interest expense:
Interest Expense, Deposits	10,668	21,049	49,856
Subordinated debentures and notes	10,960	9,885	7,507
FHLB advances	803	2,673	6,668
Other borrowings	605	1,171	2,386
Total interest expense	23,036	34,778	66,417
Net interest income	360,194	270,001	238,717
Provision for credit losses	13,385	65,398	6,372
Net interest income after provision for credit losses	346,809	204,603	232,345
Noninterest income:
Total noninterest income	67,743	54,503	49,176
Noninterest expense:
Employee compensation and benefits	124,904	92,288	81,295
Occupancy	16,286	13,457	12,465
Data processing	12,242	9,050	8,242
Professional fees	4,289	3,940	3,683
Branch-closure expenses	3,441	0	0
Merger-related expenses	22,082	4,174	17,969
Other	62,675	44,250	41,831
Noninterest expense	245,919	167,159	165,485
Income before income tax expense	168,633	91,947	116,036
Income before income tax expense	35,578	17,563	23,297
Income tax expense	$ 133,055	$ 74,384	$ 92,739
Earnings per common share
Basic (usd per share)	$ 3.86	$ 2.76	$ 3.56
Diluted (usd per share)	$ 3.86	$ 2.76	$ 3.55
Deposit Account [Member]
Noninterest income:
Total noninterest income	$ 15,428	$ 11,717	$ 12,801
Fiduciary and Trust [Member]
Noninterest income:
Total noninterest income	10,259	9,732	9,932
Card Services Revenue [Member]
Noninterest income:
Total noninterest income	11,880	9,481	9,154
Tax credit activity, net [Member]
Noninterest income:
Total noninterest income	8,028	6,611	5,393
Total miscellaneous income
Noninterest income:
Total noninterest income	$ 22,148	$ 16,962	$ 11,896

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 133,055	$ 74,384	$ 92,739
Other comprehensive income (loss), net of tax:
Change in unrealized gain (loss) on available-for-sale debt securities	(17,049)	23,944	29,189
Reclassification adjustment for realized (gain) loss on the sale of available-for-sale debt securities	0	(317)	37
Other Comprehensive Income (Loss), Reclassification of (gain) loss on held to maturity securities, net of tax	(3,624)	(1,910)	(33)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	1,161	(5,947)	(2,262)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	1,169	3,601	100
Other comprehensive income (loss), net	(18,343)	19,371	27,031
Total comprehensive income	$ 114,712	$ 93,755	$ 119,770

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other comprehensive income, tax:
Unrealized (loss)/gain on investment securities available for sale arising during the period, tax	$ 5,652	$ (7,854)	$ (9,575)
Reclassification adjustment for realized gains on sale of securities available for sale included in net income, tax	0	(104)	12
Other Comprehensive Income (Loss), Reclassification of (gain) loss on held to maturity securities, tax	$ 1,048	$ 627	$ 11

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Treasury Stock	Additional paid in capital	Retained earnings	Accumulated other comprehensive income (loss)
Shareholders' equity	$ 603,804		$ 239	$ (42,655)	$ 350,936	$ 304,566	$ (9,282)
Net income	92,739		0	0	0	92,739	0
Other comprehensive income (loss)	27,031		0	0	0	0	27,031
Cash dividends paid on common shares	(16,568)		0	0	0	(16,568)	0
Repurchase of preferred stock	(15,526)		0	(15,526)	0	0	0
Issuance under equity compensation plans, net	(212)		2	0	(214)	0	0
Shares issued in connection with acquisition of First Choice Bancorp, 7,777,272 shares, net (gross issuance 7,808,459 shares)	171,885		40	0	171,845	0	0
Share-based compensation	4,032		0	0	4,032	0	0
Shareholders' equity	867,185		281	(58,181)	526,599	380,737	17,749
Net income	74,384		0	0	0	74,384	0
Other comprehensive income (loss)	19,371		0	0	0	0	19,371
Cash dividends paid on common shares	(19,795)		0	0	0	19,795	0
Repurchase of preferred stock	(15,347)		0	(15,347)	0	0	0
Issuance under equity compensation plans, net	78		1	0	77	0	0
Shares issued in connection with acquisition of First Choice Bancorp, 7,777,272 shares, net (gross issuance 7,808,459 shares)	167,035		50	0	166,985	0	0
Share-based compensation	4,178		0	0	4,178	0	0
Reclassification for the adoption of ASU 2016-13 (CECL)	(18,114)		0	0	0	(18,114)	0
Shareholders' equity	1,078,975		332	(73,528)	697,839	417,212	37,120
Net income	133,055		0	0	0		0
Other comprehensive income (loss)	(18,343)		0	0	0	0	(18,343)
Cash dividends paid on common shares	(26,153)		0	0	0	(26,153)	0
Repurchase of preferred stock	(60,589)		(12)	0	(30,518)	(30,059)	0
Issuance under equity compensation plans, net	1,886		0	0	2,549	(663)	0
Shares issued in connection with acquisition of First Choice Bancorp, 7,777,272 shares, net (gross issuance 7,808,459 shares)	342,280		78	0	342,912	(710)	0
Share-based compensation	6,017		0	0	6,017	0	0
Stock Issued During Period, Shares, New Issues		71,988,000
Stock Issued During Period, Value, New Issues		$ 71,988
Shareholders' equity	$ 1,529,116	$ 71,988	$ 398	$ (73,528)	$ 1,018,799	$ 492,682	$ 18,777

Consolidated Statements of Sh_2

Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash dividends paid on common shares, per share	$ 0.75	$ 0.72	$ 0.62
Issuance under equity compensation plans, shares	131,564	146,005	137,271
Stock Issued During Period, Shares, Conversion of Convertible Securities	0	0	0
Shares Awarded Through Acquisition	7,777,272	4,977,214	3,990,822
Stock Repurchased During Period, Shares	1,299,527	456,251	396,737

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 133,055	$ 74,384	$ 92,739
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	6,147	6,152	5,719
Provision for credit losses	13,385	65,398	6,372
Deferred income taxes	545	(12,578)	5,800
Net amortization of debt securities	7,343	6,745	2,973
Amortization of servicing assets	2,311	37	0
Amortization of intangible assets	5,690	5,673	5,543
Mortgage loans originated-for-sale	(159,670)	(223,094)	(81,941)
Proceeds from mortgage loans sold	163,864	217,934	77,302
Sale of investment securities	0	(421)	49
Sale of other real estate	(931)	13	(113)
Sale of state tax credits	(2,220)	(2,016)	(2,549)
Asset impairment	3,441	0	0
Share-based compensation	6,017	4,178	4,032
Net accretion of loan discount	(1,140)	(7,767)	(10,494)
Changes in other assets and liabilities, net	(17,262)	876	(12,975)
Net cash provided by operating activities	160,575	135,514	92,457
Cash flows from investing activities:
Net cash paid for acquisitions and dispositions	212,642	62,114	(23,377)
Net decrease (increase) in loans	138,455	(700,096)	(284,235)
Sale of debt securities, available-for-sale	27,135	20,221	357,976
Paydown or maturity of debt securities, available-for-sale	306,360	329,350	146,132
Paydown or maturity of debt securities, held-to-maturity	49,947	41,377	7,447
Redemption of other investments	18,159	43,555	61,917
Sale of state tax credits held-for-sale	18,507	14,252	14,689
Sale of other real estate	5,915	652	4,798
Settlement of bank-owned life insurance policies	0	1,993	0
Payments for the purchase of:
Available-for-sale debt securities	(779,481)	(452,541)	(577,211)
Other investments	(9,564)	(50,421)	(68,963)
State tax credits held-for-sale	(8,689)	(11,026)	(11,356)
Fixed assets	(2,500)	(2,259)	(6,337)
Net cash used in investing activities	(23,114)	(702,829)	(378,520)
Cash flows from financing activities:
Net increase in noninterest-bearing deposit accounts	869,203	627,756	57,551
Net increase in interest-bearing deposit accounts	648,778	505,604	44,300
Proceeds from the issuance of subordinated notes	0	61,953	0
Payments for the redemption of subordinated notes	(50,000)	0	0
Proceeds (repayments) from short-term FHLB advances, net	(160,000)	(172,300)	95,500
Proceeds from long-term FHLB advances	0	0	50,000
Repayment of PPPLF advances	0	(86,096)	0
Proceeds from Notes Payable	0	0	41,000
Repayments of Notes Payable	(7,143)	(4,286)	(8,714)
Net increase in other borrowings	59,925	40,195	9,436
Cash dividends paid on common stock	(26,153)	(19,795)	(16,568)
Payments for Repurchase of Common Stock	(60,589)	(15,347)	(15,526)
Proceeds from issuance of preferred stock, net	71,988	0	0
Payments for Repurchase of Equity	516	78	(212)
Net cash provided by financing activities	1,346,525	937,762	256,767
Net increase (decrease) in cash and cash equivalents	1,483,986	370,447	(29,296)
Cash and cash equivalents, beginning of period	537,703	167,256	196,552
Cash and cash equivalents, end of period	2,021,689	537,703	167,256
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	23,957	35,423	65,667
Cash paid during the period for income taxes	56,845	7,514	13,582
Noncash investing and financing transactions:
Real Estate Owned, Transfer to Real Estate Owned	3,227	798	8,148
Sales of other real estate financed	228	48	621
Transfer of securities from available-for-sale to held-to-maturity	0	352,665	116,303
Transfer from fixed assets to loans	0	3,336	0
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 5,658	$ 1,623	$ 5,208
Stock Issued During Period, Shares, Acquisitions	343,650	167,035	171,885

Parent Company Only Condensed F

Parent Company Only Condensed Financial Statements (Parenthetical) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Collateral pledged	$ 36,525	$ 36,525

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES The significant accounting policies used by the Company in the preparation of the consolidated financial statements are summarized below. Business and Consolidation Enterprise is a financial holding company that provides a full range of banking and wealth management services to individuals and corporate customers primarily located in the Arizona, California, Kansas, Missouri, Nevada, and New Mexico markets through its banking subsidiary, Enterprise Bank & Trust. All intercompany accounts and transactions have been eliminated. The Company and its banking subsidiary are subject to the regulations of certain federal and state agencies and undergo periodic examinations by those regulatory agencies. The Company has one operating segment. Use of Estimates The consolidated financial statements of the Company have been prepared in conformity with GAAP. In preparing the consolidated financial statements, management is required to make estimates and assumptions, which significantly affect the reported amounts in the consolidated financial statements. Such estimates include the valuation of loans, goodwill, intangible assets, and other long-lived assets, along with assumptions used in the calculation of income taxes, among others. These estimates and assumptions are based on management’s best estimates and judgment. Management evaluates its estimates and assumptions on an ongoing basis using experience and other factors, including the current economic environment, which management believes to be reasonable under the circumstances. Management adjusts such estimates and assumptions when facts and circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. Changes in those estimates resulting from continuing changes in the economic environment will be reflected in the financial statements in future periods. Cash Flow Information For purposes of reporting cash flows, the Company considers cash and due from banks, interest-bearing deposits and federal funds sold that mature within 90 days of the balance sheet date to be cash and cash equivalents. The balances at December 31, 2021 and 2020 were not subject to reserve requirements from the Federal Reserve. Recent Accounting Pronouncements ASU 2021-01, Reference Rate Reform (Topic 848): Scope (ASU 2021-01). ASU 2021-01 was issued in January 2021 and provided optional expedients and exceptions in ASC 848 to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The amendment only applies to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. The expedients and exceptions provided by the amendments will not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022, except for hedging relationships existing as of December 31, 2022, that an entity has elected certain optional expedients for and that are retained through the end of the hedging relationship. The amendments in this update were effective immediately upon issuance and did not have a material effect on the consolidated financial statements. Investments The Company has classified all investments in debt securities as available-for-sale or held-to-maturity. Securities classified as available-for-sale are carried at fair value. Unrealized holding gains and losses for available-for-sale securities are excluded from earnings and reported as a net amount in a separate component of shareholders’ equity until realized. All previous fair value adjustments included in the separate component of shareholders’ equity are reversed upon sale. Securities classified as held-to-maturity are carried at amortized cost and adjusted for amortization of premiums and accretion of discounts. Prior to the adoption of ASU 2016-13 on January 1, 2020, declines in the fair value of securities below their cost deemed to be other-than-temporary were reflected in operations as realized losses. In estimating other-than-temporary impairment losses, management evaluated investment securities for other-than-temporary declines in fair value on a quarterly basis. This analysis required management to consider various factors, which included (1) the present value of the cash flows expected to be collected compared to the amortized cost of the security, (2) duration and magnitude of the decline in value, (3) the financial condition of the issuer or issuers, (4) structure of the security, and (5) the intent to sell the security or whether it’s more likely than not the Company would be required to sell the security before its anticipated recovery in market value. An ACL on held-to-maturity securities is deducted from the amortized cost basis of the securities to reflect the expected amount to be collected. When it is determined that a security will not be collected, the balance is written-off through the allowance. In evaluating the need for an ACL, securities with similar risk characteristics are grouped and an estimate of expected cash flows is determined using loss experience, adjusted for current and reasonable and supportable forecasts of economic conditions. For available-for-sale securities in a loss position, the Company evaluates whether the decline in fair value below amortized cost resulted from a credit loss or other factors. Losses attributed to credit are recognized through an ACL on available-for-sale securities, limited to the amount that the fair value of securities is less than the amortized cost basis. In assessing credit loss, the Company considers, among other things, (1) the extent to which fair value is less than the amortized cost basis, (2) adverse conditions specific to the security or industry, (3) historical payment patterns, (4) the likelihood of future payments, and (5) changes to the rating of a security by a rating agency. The Company has elected to exclude accrued interest receivable balances from the estimate of the ACL as these amounts are timely written off as a credit loss expense. Adjustments to the ACL on held-to-maturity and available-for-sale securities are recognized as a component of the provision for credit losses in the Consolidated Statements of Operations. Premiums and discounts are amortized or accreted over the expected lives of the respective securities as an adjustment to yield using the interest method. Dividend and interest income is recognized when earned. Realized gains and losses are included in earnings and are derived using the specific identification method for determining the cost of securities sold. Loans Held-for-Sale and Servicing Assets The Company provides long-term financing of one-to-four-family residential real estate by originating fixed and variable rate loans. Long-term fixed and variable rate loans are usually sold into the secondary market with limited recourse. Upon receipt of an application for a real estate loan, the Company determines whether the loan will be sold into the secondary market or retained in the Company’s loan portfolio. The interest rates on the loans sold are locked with the buyer and the Company bears no interest rate risk related to these loans. Mortgage loans held-for-sale are carried at the lower of cost or fair value, which is determined on a specific identification method. The Company does not retain servicing on these loans. The Company also originates SBA7(a) loans that generally provide for a guarantee of 75% up to a maximum amount. The guaranteed portion of the loan can be sold in an active secondary market. For the years ended December 31, 2021 and 2020, all SBA7(a) loans are considered held-for-investment; however, as the Company makes the determination to sell the loans, they will be moved into the held-for-sale category. Sales of SBA guaranteed loans are executed on a servicing retained basis, and the Company retains the rights and obligations to service the loans. At December 31, 2021, the Company was servicing SBA loans that had been sold and has recorded a related servicing asset of $6.7 million. The servicing asset is accounted for under the amortization method and is evaluated for impairment. Amortization of the servicing asset is recorded as a reduction to servicing income. Gains on the sale of loans held-for-sale are reported net of direct origination fees and costs in the Company’s Consolidated Statements of Operations. Loans Loans are reported at the principal balance outstanding, net of unearned fees, costs, and premiums or discounts on acquired loans. Loan origination fees, direct origination costs, and premiums or discounts resulting from acquired loans are deferred and recognized over the lives of the related loans as a yield adjustment using the interest method. Interest on loans is accrued to income based on the principal balance outstanding. The recognition of interest income is discontinued when a loan becomes 90 days past due or a significant deterioration in the borrower’s credit has occurred which, in management’s judgment, negatively impacts the collectibility of the loan. Unpaid interest on such loans is reversed at the time the loan becomes uncollectible and subsequent interest payments received are generally applied to principal if any doubt exists as to the collectibility of such principal. Loans that have not been restructured are returned to accrual status when management believes full collectibility of principal and interest is expected. Non-accrual loans that have been restructured will remain in a non-accrual status until the borrower has made at least six months of consecutive contractual payments. The Company has elected to present the accrued interest receivable balance separate from amortized cost basis, to exclude accrued interest receivable balances from the tabular disclosures, and not to estimate an ACL on accrued interest receivable as these amounts are timely written off as a credit loss expense. Accrued interest receivable totaled $31.1 million and $30.6 million at December 31, 2020 and 2021, respectively, and were reported in Other Assets on the consolidated balance sheets. Acquired Loans Prior to the adoption of ASU 2016-13 on January 1, 2020, PCI loans were acquired in a business combination or transaction, had evidence of deterioration of credit quality since origination and for which it was probable, at acquisition, that the Company would be unable to collect all contractually required payments receivable. PCI loans were initially recorded at fair value (as determined by the present value of expected future cash flows) with no valuation allowance. The difference between the undiscounted cash flows expected at acquisition and the investment in the loans, or the “accretable yield,” was recognized as interest income on a level-yield method over the life of the loans. Contractually required payments for interest and principal that exceeded the undiscounted cash flows expected at acquisition, or the “nonaccretable difference,” were not recognized as a yield adjustment or as a loss accrual or a valuation allowance. The Company aggregated individual loans with common risk characteristics into pools of loans. Increases in expected cash flows subsequent to the initial investment were recognized prospectively through adjustment of the yield on the loans over their remaining lives. Decreases in expected cash flows due to an inability to collect contractual cash flows were recognized as impairment through the provision for loan losses account. Any allowance for loan loss on these pools reflected only losses incurred after the acquisition. Disposals of loans, including sales of loans, paydowns, payments in full or foreclosures resulted in the removal or reduction of the loan from the loan pool. Subsequent to the adoption of ASU 2016-13, acquired loans are separated into two categories based on the credit risk characteristics of the underlying borrowers as either PCD, for loans which have experienced more than insignificant credit deterioration since origination, or loans with no credit deterioration (non-PCD). At the date of acquisition, an ACL on PCD loans is determined and added to the amortized cost basis of the individual loans. The difference between the initial amortized cost basis and the par value of the loan is a noncredit discount or premium, which is amortized into interest income over the life of the loan. The ACL on PCD loans is recorded in the acquisition accounting and no provision for credit losses is recognized at the acquisition date. Subsequent changes to the ACL are recorded through provision expense. For non-PCD loans, an ACL is established immediately after the acquisition through a charge to the provision for credit losses. The ACL for both PCD and non-PCD is determined by pooling loans with similar risk characteristics and using the approach discussed below under “Allowance for Credit Losses on Loans”. Impaired Loans Loans are considered “impaired” when it becomes probable that the Company will be unable to collect all amounts due according to the loan’s contractual terms. Non-accrual loans, loans past due greater than 90 days and still accruing, unless adequately secured and in the process of collection, and restructured loans qualify as “impaired loans.” Restructured loans involve the granting of a concession on the terms of a loan to a borrower experiencing financial difficulty. Concessions may be granted in various forms, including changes in payment schedule or interest rate. When measuring impairment, the expected future cash flows of an impaired loan are discounted at the loan’s effective interest rate at origination. Alternatively, impairment can be measured by reference to an observable market price, if one exists, or the fair value of the collateral for a collateral-dependent loan. Loans and leases, which are deemed uncollectible, are charged off to the allowance for credit losses, while recoveries of amounts previously charged off are credited to the allowance for credit losses. Loans are generally placed on non-accrual status when contractually past due 90 days or more as to interest or principal payments. Additionally, whenever management becomes aware of facts or circumstances that may adversely impact the collectability of principal or interest on loans, it is management’s practice to place such loans on non-accrual status immediately, rather than delaying such action until the loans become 90 days past due. Previously accrued and uncollected interest on such loans is reversed. Income is recorded only to the extent a determination has been made that the principal balance of the loan is collectible and the interest payments are subsequently received in cash, or for a restructured loan, the borrower has made six consecutive contractual payments. If collectibility of the principal is in doubt, payments received are applied to loan principal. Loans past due 90 days or more but still accruing interest are also generally included in nonperforming loans. Loans past due 90 days or more but still accruing are classified as such where the underlying loans are both well secured (the collateral value covers principal and accrued interest) and in the process of collection. Allowance for Credit Losses on Loans The ACL on loans is a valuation account that is deducted from the amortized cost basis to present the net amount expected to be collected. Loans are charged-off against the allowance when management believes the uncollectibility of a loan balance is confirmed. Management estimates the allowance using relevant available information, from internal and external sources, relating to past events, current conditions, and reasonable and supportable forecasts. 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, delinquency level, or term as well as for changes in environmental conditions, such as changes in unemployment rates, property values, or other relevant factors. The ACL on loans is measured on a collective basis when similar risk characteristics exist. The Company has identified the following portfolio segments: C&I – C&I loans consist of loans to small and medium-sized businesses in a wide variety of industries. These loans are generally collateralized by inventory, accounts receivable, equipment, real estate and other commercial assets, and may be supported by other credit enhancements such as personal guarantees. Risk arises primarily due to a difference between expected and actual cash flows of the borrower. However, the recoverability of these loans is also dependent on other factors primarily dictated by the type of collateral securing these loans. The fair value of the collateral securing these loans may fluctuate as market conditions change. Included within C&I are revolving loans supported by borrowing bases that fluctuate depending on the amount of underlying collateral. A portion of C&I loans consists of sponsor finance, which are loans with senior debt exposure to private equity backed companies. CRE – CRE loans include various types of loans for which the Company holds real property as collateral. Commercial real estate lending activity is typically restricted to owner-occupied properties or to investor properties that are owned by customers with a current banking relationship. The primary risks of CRE loans include the borrower’s inability to pay, material decreases in the value of the real estate being held as collateral and significant increases in interest rates, which may make the real estate mortgage loan unprofitable. Real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. Construction and Land Development – The Company originates loans to finance construction projects including 1-4 family residences, multifamily residences, commercial office, and industrial projects. Construction loans are generally collateralized by first liens on the real estate and have floating interest rates. Construction loans are considered to have higher risks due to construction completion and timing risk, and the ultimate repayment being sensitive to interest rate changes, governmental regulation of real property and the availability of long-term financing. Additionally, economic conditions may impact the Company’s ability to recover its investment in construction loans. Adverse economic conditions may negatively impact the real estate market which could affect the borrowers’ ability to complete and sell the project. Additionally, the fair value of the underlying collateral may fluctuate as market conditions change. Residential Real Estate – The Company originates loans to finance one- to four-family residences, secured by both first and second liens. Repayment of these loans is dependent on the borrowers’ ability to pay and the fair value of the underlying collateral. Residential loans with a second lien are inherently riskier due to the junior lien position. Agricultural – Agricultural loans are generally secured with equipment, livestock, crops or other non-real property and at times the underlying real property. Agricultural loans are primarily included as a component of CRE and C&I loans. Consumer – The Company provides a broad range of consumer loans to customers, including personal lines of credit, credit cards, recreational vehicles, yachts and automobile loans. Repayment of these loans is dependent on the borrowers’ ability to pay and the fair value of the underlying collateral. Consumer loans are included as a component of Other loans. The Company utilizes a DCF method to measure the ACL on loans collectively evaluated that are sub-segmented by credit risk levels. The DCF method incorporates assumptions for probability of default, loss given default, prepayments and curtailments over the contractual term of the loans. In determining the probability of default, the Company utilized regression analysis to determine certain economic factors that are relevant loss drivers in the portfolio segments based on historical or peer evaluations. National unemployment is a loss driver used in nearly all portfolios, except Consumer and first lien Residential Real Estate. The annual percentage change in gross domestic product is also used in C&I, Construction, Agricultural first lien Residential Real Estate, and Consumer portfolios. The annual percentage change in a commercial real estate index, national house price index and national retail sales are used in the CRE, second lien Residential Real Estate and Consumer portfolios, respectively. The contractual term excludes expected extensions, renewals, and modifications unless either of the following applies: management has a reasonable expectation at the reporting date that a troubled debt restructuring will be executed with an individual borrower, or the extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by the Company. The Company uses a one-year reasonable and supportable forecast that considers baseline, upside and downside economic scenarios. For periods beyond the forecast period, the Company reverts to historical loss rates on a straight-line basis over a one-year period. Loans that do not share risk characteristics are evaluated on an individual basis. Loans evaluated individually are not also included in the collective evaluation. When management determines foreclosure is probable, expected credit losses are based on the fair value of the collateral at the reporting date, adjusted for selling costs as appropriate. Loan Charge-Offs Loans are charged-off when the primary and secondary sources of repayment (cash flow, collateral, guarantors, etc.) are less than their carrying value. Other Real Estate Other real estate represents property acquired through foreclosure or deeded to the Company in lieu of foreclosure on loans on which the borrowers have defaulted on the payment of principal or interest. Other real estate is recorded on an individual asset basis at the lower of cost or fair value less estimated costs to sell. The fair value of other real estate is based upon estimates of future cash flows, market value of similar assets, if available, or independent appraisals. These estimates involve significant uncertainties and judgments. As a result, fair value estimates may not be realizable in a current sale or settlement of the other real estate. Subsequent reductions in fair value are expensed within noninterest expense. Gains and losses resulting from the sale of other real estate are credited or charged to current period earnings. Costs of maintaining and operating other real estate are expensed as incurred, and expenditures to complete or improve other real estate properties are capitalized if the expenditures are expected to be recovered upon ultimate sale of the property. Fixed Assets Buildings, leasehold improvements, furniture, fixtures, and equipment are stated at cost less accumulated depreciation. All categories are computed using the straight-line method over their respective estimated useful lives. Furniture, fixtures and equipment is depreciated over three ten State Tax Credits The Company has purchased the rights to receive 10-year streams of state tax credits at agreed upon discount rates and sells such tax credits to its clients and others. State tax credits are accounted for at cost. The Company is also a minority partner in a joint venture, accounted for as an equity method investment, that purchases state income tax credits for resale to customers. Income from both the sale of state tax credits and earnings from the joint venture are reported as tax credit income in the Consolidated Statements of Operations. Cash Surrender Value of Life Insurance The Company has purchased bank-owned life insurance policies on certain bank officers. Bank-owned life insurance is recorded at its cash surrender value. Changes in the cash surrender values, including death benefits in excess of the carrying amount, are included in noninterest income. Federal Home Loan Bank Stock The Bank, as a member of the FHLB, is required to maintain an investment in the capital stock of the FHLB. The stock is redeemable at par by the FHLB, and is, therefore, carried at cost and periodically evaluated for impairment. The Company records FHLB dividends in interest income. Goodwill and Other Intangible Assets The Company tests goodwill for impairment on an annual basis and whenever events or changes in circumstances indicate the Company may not be able to recover the respective asset’s carrying amount. The Company’s annual test for impairment was performed in the fourth quarter of December 31, 2021. Such tests involve the use of estimates and assumptions. Potential impairments to goodwill must first be identified by performing a qualitative assessment which evaluates relevant events or circumstances to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If this test indicates it is more likely than not that goodwill has been impaired, then a quantitative impairment test is completed. The quantitative impairment test calculates the fair value of the reporting unit and compares it with its carrying amount, including goodwill. If the carrying amount of goodwill exceeds its implied fair market value, an impairment loss is recognized. That loss is equal to the carrying amount of goodwill that is in excess of its implied fair market value. Core deposit intangibles are amortized using an accelerated method over an estimated useful life of approximately 10 years. Impairment of Long-Lived Assets Long-lived assets, such as fixed assets and purchased intangibles subject to amortization, are reviewed for impairment whenever events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds the fair value of the asset. Assets to be disposed of are separately presented in the balance sheet and reported at the lower of the carrying amount or fair value less costs to sell, and are no longer depreciated. The assets and liabilities of a disposal group classified as held-for-sale are presented separately in the appropriate asset and liability sections of the balance sheet. Derivative Financial Instruments and Hedging Activities The Company uses derivative financial instruments to assist in managing interest rate sensitivity and to modify the repricing, maturity and option characteristics of certain assets and liabilities. In addition, the Company also offers an interest rate hedge program that includes interest rate swaps to assist its customers in managing their interest rate risk profile. In order to eliminate the interest rate risk associated with offering these products, the Company enters into derivative contracts with third parties to offset the customer contracts. Derivative instruments are required to be measured at fair value and recognized as either assets or liabilities in the consolidated financial statements. Fair value represents the payment the Company would receive or pay if the item were sold or bought in a current transaction. The accounting for changes in fair value (gains or losses) of a hedged item is dependent on whether the related derivative is designated and qualifies for “hedge accounting.” The Company assigns derivatives to one of these categories at the purchase date: cash flow hedge, fair value hedge, or non-designated hedges as part of a customer interest-rate swap product. An assessment of the expected and ongoing hedge effectiveness of any derivative designated a fair value hedge or cash flow hedge is performed as required by the accounting standards. Derivatives are included in other assets and other liabilities in the consolidated balance sheets. The fair value amounts recognized for derivative instruments and the fair value amounts recognized for the right to reclaim or obligation to return cash collateral are not offset when represented under a master netting arrangement. Generally, the only derivative instruments used by the Company have been interest rate swaps, forward currency contracts, and interest rate caps. Certain derivative financial instruments are not designated as cash flow or as fair value hedges for accounting purposes. These non-designated derivatives are intended to provide interest rate protection on net interest income or noninterest income but do not meet hedge accounting treatment. Customer accommodation interest rate swap contracts are not designated as hedging instruments. Changes in the fair value of these instruments are recorded in interest income or noninterest income in the consolidated statements of income depending on the underlying hedged item. Income Taxes The Company and its subsidiaries file a consolidated federal income tax return. Deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates in effect for the year in which those temporary differences are expected to be recovered or settled. The need for deferred tax asset valuation allowances is based on a more-likely-than-not standard. The ability to realize deferred tax assets depends on the ability to generate sufficient positive taxable income within the carryback or carryforward periods provided for in the laws for each applicable taxing jurisdiction. The following possible sources of taxable income are considered: future reversal patterns of existing taxable temporary differences, future taxable income exclusive of reversing temporary differences, taxable income in prior carryback years and the availability of qualified tax planning strategies. The assessment regarding whether a valuation allowance is required or should be adjusted depends on all available positive and negative factors including, but not limited to, nature, frequency, and severity of recent losses, duration of available carryforward periods, experience with tax attributes expiring unused and near and medium term financial outlook. Because of the complexity of tax laws and regulations, interpretation can be difficult and subject to legal judgment given specific facts and circumstances. It is possible that others, given the same information, may at any point in time reach different reasonable conclusions regarding the estimated amounts of accrued taxes. Stock-Based Compensation Stock-based compensation is recognized as an expense for stock options, restricted stock awards, performance stock units, and restricted stock units granted to employees, directors, and advisors in return for service. Equity classified awards are measured at the grant date fair value using either an observable market value or a valuation methodology, and are recognized over the requisite service period on a straight-line basis. Forfeitures are recorded as they occur. A description of the Company’s stock-based employee compensation plan is included in “Note 16 - Shareholders’ Equity and Compensation Plans.” Acquisitions and Divestitures Acquisitions and business combinations are accounted for using the acquisition method of accounting. The assets and liabilities of the acquired entities have been recorded at their estimated fair values at the date of acquisition. Goodwill represents the excess of the purchase price over the fair value of net assets acquired, including the amount assigned to identifiable intangible assets. The purchase price allocation process requires an estimation of the fair values of the assets acquired and the liabilities assumed. When a business combination agreement provides for an adjustment to the cost of the combination contingent on future events, the Company includes an estimate of the acq

Acquisitions & Divestitures

Acquisitions & Divestitures	12 Months Ended
	Dec. 31, 2021
Business Combinations [Abstract]
Mergers, Acquisitions and Dispositions Disclosures [Text Block]	ACQUISITIONS The acquisition noted below has been accounted for as a business combination using the acquisition method of accounting which requires assets acquired and liabilities assumed to be recognized at fair value as of the acquisition date. Goodwill arising from the acquisitions consist largely of the synergies and economies of scale expected from combining the operations into Enterprise. None of the goodwill recognized is expected to be deductible for income tax purposes. Acquisition of First Choice Bancorp On July 21, 2021, the Company closed its acquisition of 100% of First Choice and its wholly-owned subsidiary, FCB, which operated eight full-service branches in California. First Choice shareholders received 0.6603 shares of EFSC common stock for each First Choice common share and cash in lieu of any fractional shares. In connection with the merger, Enterprise issued approximately 7.8 million shares of EFSC Common Stock valued at $44.01 per share, which was the closing price of Enterprise common stock on July 21, 2021. The value of the transaction consideration was approximately $346 million, which includes approximately $2.1 million payable to holders of First Choice stock options. For the year ended December 31, 2021, the Company recognized $18.8 million of merger-related costs recorded in noninterest expense in the statement of operations related to the First Choice acquisition. The following tables present the assets acquired and liabilities assumed. The consideration exchanged, assets acquired and liabilities assumed of First Choice were recorded at estimated fair value on the date of acquisition. Fair values are considered preliminary until final fair values are determined, or the measurement period has passed, which is no later than one year from the date of acquisition. (in thousands) As Recorded by First Choice Adjustments As Recorded by EFSC Assets acquired: Cash and cash equivalents $ 214,794 $ — $ 214,794 Securities 34,533 (44) (a) 34,489 Loans 1,937,635 5,508 (b) 1,943,143 Allowance (19,626) 12,620 (b) (7,006) Other investments 19,178 138 (c) 19,316 Fixed assets 1,869 (870) (c) 999 Accrued interest receivable 7,131 20 (c) 7,151 Goodwill 73,425 (73,425) (d) — Intangible assets 4,517 375 (e) 4,892 Deferred tax assets 7,558 (1,943) (c) 5,615 Other assets 23,024 1,645 (c) 24,669 Total assets acquired $ 2,304,038 $ (55,976) $ 2,248,062 Liabilities assumed: Deposits $ 1,840,716 $ (287) (c) $ 1,840,429 FHLB advances 160,000 — 160,000 Accrued interest payable 124 — 124 Other liabilities 8,464 (2,160) (c) 6,304 Total liabilities assumed $ 2,009,304 $ (2,447) $ 2,006,857 Net assets acquired $ 294,734 $ (53,529) $ 241,205 Consideration paid: Cash $ 2,152 Common stock 1 343,650 Total consideration paid $ 345,802 Goodwill $ 104,597 1 Common stock consideration was $342,280, net of $1,370 for shares withheld on the settlement of share-based awards of FCBP employees. (a) Fair value adjustments based on the Company’s evaluation of the acquired securities portfolio. (b) Fair value adjustments based on the Company’s evaluation of the acquired loan portfolio, write-off of net deferred loan costs and elimination of the allowance for loan losses recorded by FCBP. (c) Other miscellaneous fair value adjustments. (d) Adjustment to eliminate goodwill. (e) Eliminate acquired intangibles and record the core deposit intangible asset on the acquired core deposit accounts. Amount to be amortized using a sum-of-years digits method over a useful life of 10 years. The following table provides the unaudited pro forma information for the results of operations for the twelve months ended December 31, 2021 and 2020, as if the acquisition had occurred on January 1, 2020. The pro forma results combine the historical results of FCBP with the Company’s Consolidated Statements of Income, adjusted for the impact of the application of the acquisition method of accounting including amortization and accretion of fair value adjustments. The pro forma results have been prepared for comparative purposes only and are not necessarily indicative of the results that would have been obtained had the acquisition actually occurred on January 1, 2020. No assumptions have been applied to the pro forma results of operations regarding possible revenue enhancements, expense efficiencies or asset dispositions. Only the acquisition-related expenses that have been incurred as of December 31, 2021 are included in net income in the table below. Twelve months ended December 31, (in thousands, except per share data) 2021 2020 Total revenues (net interest income plus noninterest income) $ 488,280 $ 420,487 Net income 188,416 67,275 Diluted earnings per common share 4.86 1.94 For the year ended December 31, 2021, total revenue and pre-tax net income from FCBP of $40.5 million and $25.9 million (excluding the provision for credit losses of $25.4 million on the acquired loan portfolio and unfunded loan commitments) were included in the Company’s consolidated results.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2021
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE The following table presents a summary of earnings per common share data and amounts for the periods indicated. Year ended December 31, ($ in thousands, except per share data) 2021 2020 2019 Net income available to common shareholders $ 133,055 $ 74,384 $ 92,739 Weighted average common shares outstanding 34,436 26,954 26,045 Additional dilutive common stock equivalents 60 35 114 Weighted average diluted common shares outstanding 34,496 26,989 26,159 Basic earnings per common share $ 3.86 $ 2.76 $ 3.56 Diluted earnings per common share $ 3.86 $ 2.76 $ 3.55 For 2021, 2020 and 2019, common stock equivalents of approximately 158,000, 156,000 and 21,000, respectively, were excluded from the earnings per share calculation because their effect would have been anti-dilutive.

Investments

Investments	12 Months Ended
	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Investments	INVESTMENTS The following table presents the amortized cost, gross unrealized gains and losses and fair value of securities available-for-sale and held-to-maturity: December 31, 2021 ($ in thousands) Amortized Cost Gross Gross Fair Value Available-for-sale securities: Obligations of U.S. Government-sponsored enterprises $ 175,409 $ 3 $ (1,901) $ 173,511 Obligations of states and political subdivisions 571,587 5,907 (2,410) 575,084 Agency mortgage-backed securities 509,243 8,485 (3,869) 513,859 Corporate debt securities 11,750 632 — 12,382 U.S. Treasury Bills 90,971 220 (21) 91,170 Total securities available-for-sale $ 1,358,960 $ 15,247 $ (8,201) $ 1,366,006 Held-to-maturity securities: Obligations of states and political subdivisions $ 236,379 $ 1,794 $ (730) $ 237,443 Agency mortgage-backed securities 68,105 940 (666) 68,379 Corporate debt securities 125,811 3,039 — 128,850 Total securities held-to-maturity $ 430,295 $ 5,773 $ (1,396) $ 434,672 Allowance for credit losses (614) Total securities held-to-maturity, net $ 429,681 December 31, 2020 ($ in thousands) Amortized Cost Gross Gross Fair Value Available-for-sale securities: Obligations of U.S. Government-sponsored enterprises $ 14,978 $ 186 $ (3) $ 15,161 Obligations of states and political subdivisions 335,271 8,994 (33) 344,232 Agency mortgage-backed securities 506,703 20,190 (321) 526,572 Corporate debt securities 14,750 248 — 14,998 U.S. Treasury Bills 10,980 486 — 11,466 Total securities available-for-sale $ 882,682 $ 30,104 $ (357) $ 912,429 Held-to-maturity securities: Obligations of states and political subdivisions $ 248,324 $ 2,814 $ — $ 251,138 Agency mortgage-backed securities 112,742 2,295 (496) 114,541 Corporate debt securities 126,993 8,851 — 135,844 Total securities held-to-maturity $ 488,059 $ 13,960 $ (496) $ 501,523 Allowance for credit losses (449) Total securities held-to-maturity, net $ 487,610 During 2020, the Company transferred securities with a book value of $331.0 million and fair value of $352.6 million from available-for-sale to held-to-maturity. The Company believes the held-to-maturity category is more consistent with the Company’s intent for these securities. The transfer of securities was made at fair value at the time of transfer. The unamortized portion of the unrealized holding gain at the time of transfer is retained in accumulated other comprehensive income and in the carrying value of held-to-maturity securities. Accordingly, the balance of held-to-maturity securities in the “Amortized cost” column in the table above includes a net unamortized unrealized gain of $21.0 million and $25.6 million at December 31, 2021 and 2020, respectively. Such amounts are amortized over the remaining life of the securities. In January 2022, the Company transferred securities with a book value of $116.7 million from available-for-sale to held-to-maturity. At December 31, 2021, and 2020, there were no holdings of securities of any one issuer in an amount greater than 10% of shareholders’ equity, other than the U.S. Government agencies and sponsored enterprises. The agency mortgage-backed securities are all issued by U.S. Government-sponsored enterprises. Securities having a fair value of $752.7 million and $525.8 million at December 31, 2021, and December 31, 2020, respectively, were pledged as collateral to secure deposits of public institutions and for other purposes as required by law or contract provisions. The amortized cost and estimated fair value of debt securities at December 31, 2021, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Available-for-sale Held-to-maturity ($ in thousands) Amortized Cost Estimated Amortized Cost Estimated Due in one year or less $ 81,809 $ 81,797 $ 211 $ 214 Due after one year through five years 166,470 165,161 13,793 13,998 Due after five years through ten years 40,130 40,568 143,900 146,933 Due after ten years 561,308 564,621 204,286 205,148 Agency mortgage-backed securities 509,243 513,859 68,105 68,379 $ 1,358,960 $ 1,366,006 $ 430,295 $ 434,672 There were approximately 290 available-for-sale securities and 30 available-for-sale securities in an unrealized loss position as of December 31, 2021 and December 31, 2020, respectively, included in the following tables: December 31, 2021 Less than 12 months 12 months or more Total ($ in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Obligations of U.S. Government-sponsored enterprises $ 163,634 $ 1,775 $ 4,874 $ 126 $ 168,508 $ 1,901 Obligations of states and political subdivisions 242,188 2,361 1,776 49 243,964 2,410 Agency mortgage-backed securities 259,047 3,685 6,467 184 265,514 3,869 U.S. Treasury Bills 60,961 21 — — 60,961 21 $ 725,830 $ 7,842 $ 13,117 $ 359 $ 738,947 $ 8,201 December 31, 2020 Less than 12 months 12 months or more Total ($ in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Obligations of U.S. Government-sponsored enterprises $ 4,997 $ 3 $ — $ — $ 4,997 $ 3 Obligations of states and political subdivisions 4,079 33 — — 4,079 33 Agency mortgage-backed securities 65,986 321 — — 65,986 321 $ 75,062 $ 357 $ — $ — $ 75,062 $ 357 The unrealized losses at both December 31, 2021, and 2020, were primarily attributable to changes in market interest rates since the securities were purchased. At both December 31, 2021 and 2020, the Company had not recorded an ACL on available-for-sale securities. Accrued interest receivable on held-to-maturity debt securities totaled $3.4 million and $3.6 million at December 31, 2021 and 2020, respectively, and is excluded from the estimate of expected credit losses. The estimate of expected credit losses considers historical credit loss information adjusted for current conditions and reasonable and supportable forecasts. At December 31, 2021 and 2020, the ACL on held-to-maturity securities was $0.6 million and $0.4 million, respectively. The proceeds, gross gains and losses realized from sales of available-for-sale investment securities were as follows: December 31, ($ in thousands) 2021 2020 2019 Gross gains realized $ — $ 421 $ 400 Gross losses realized — — (449) Proceeds from sales 27,135 20,221 357,976 Other Investments At December 31, 2021, and 2020, other investments totaled $59.9 million and $48.8 million, respectively. As a member of the FHLB system administered by the Federal Housing Finance Agency, the Bank is required to maintain a minimum investment in capital stock with the FHLB consisting of membership stock and activity-based stock. The FHLB capital stock of $12.1 million, and $10.8 million at December 31, 2021, and 2020, respectively, is recorded at cost, which represents redemption value, and is included in other investments in the consolidated balance sheets. The remaining amounts in other investments primarily include various investments in SBICs, CDFIs, and the Company’s investment in unconsolidated trusts used to issue preferred securities to third parties, see “Note 11 – Subordinated Debentures.”

Portfolio Loans

Portfolio Loans	12 Months Ended
	Dec. 31, 2021
Receivables [Abstract]
Portfolio Loans	LOANS Below is a summary of loans by category at December 31, 2021 and 2020: ($ in thousands) December 31, 2021 December 31, 2020 Commercial and industrial $ 3,396,590 $ 3,100,299 Real estate loans: Commercial - investor owned 2,141,143 1,589,419 Commercial - owner occupied 2,035,785 1,498,408 Construction and land development 734,073 546,686 Residential 454,052 319,179 Total real estate loans 5,365,053 3,953,692 Other 265,137 187,083 Loans, before unearned loan fees 9,026,780 7,241,074 Unearned loan fees, net (9,138) (16,139) Loans, including unearned loan fees $ 9,017,642 $ 7,224,935 PPP loans totaled $276.2 million at December 31, 2021, or $272.0 million net of unearned fees of $4.2 million. PPP loans totaled $709.9 million at December 31, 2020, or $698.6 million net of unearned fees of $11.3 million. The loan balance includes a net premium on acquired loans of $11.9 million and $16.1 million at December 31, 2021 and 2020, respectively. At December 31, 2021 loans of $2.5 billion were pledged to the FHLB and the Federal Reserve. Loans to executive officers and directors, or to entities in which such individuals had beneficial interests as a shareholder, officer, or director totaled $5.7 million for each year ended December 31, 2021 and 2020. Such loans were made in the normal course of business on substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with other customers and did not involve more than the normal risk of collectibility. A summary of the activity, by loan category, in the allowance for loan losses for 2019, excluding the allowance on PCI loans, and the ACL on loans for 2020 and 2021 is as follows: ($ in thousands) Commercial and industrial CRE - investor owned CRE - owner occupied Construction and land development Residential real estate Other Total Balance at December 31, 2019 Allowance for loan losses: Balance, beginning of year $ 29,039 $ 4,683 $ 4,239 $ 1,987 $ 1,616 $ 731 $ 42,295 Provision for loan losses 4,801 1,708 673 (237) (330) 67 6,682 Charge-offs (6,882) (551) (58) (54) (667) (382) (8,594) Recoveries 338 95 19 776 661 295 2,184 Balance, end of year $ 27,296 $ 5,935 $ 4,873 $ 2,472 $ 1,280 $ 711 $ 42,567 Balance at December 31, 2020 Allowance for loan losses: Balance at December 31, 2019 $ 27,296 $ 5,935 $ 4,873 $ 2,472 $ 1,280 $ 711 $ 42,567 PCI allowance at December 31, 2019 159 — — 139 — 423 721 CECL adoption 6,494 10,726 2,598 5,183 3,470 (84) 28,387 PCD loans immediately charged off — (5) (57) (217) (1,401) — (1,680) Balance, beginning of year $ 33,949 $ 16,656 $ 7,414 $ 7,577 $ 3,349 $ 1,050 $ 69,995 Provision for loan losses 28,373 11,037 7,845 13,438 674 2,012 63,379 Initial allowance on acquired PCD loans 23 2,026 1,427 45 3 — 3,524 Charge-offs (5,381) (498) (30) (31) (408) (391) (6,739) Recoveries 1,848 2,841 356 384 967 116 6,512 Balance, end of year $ 58,812 $ 32,062 $ 17,012 $ 21,413 $ 4,585 $ 2,787 $ 136,671 Balance at December 31, 2021 Allowance for credit losses: Balance, beginning of year $ 58,812 $ 32,062 $ 17,012 $ 21,413 $ 4,585 $ 2,787 $ 136,671 Provision (benefit) for loan losses 14,361 568 (550) (7,365) 3,900 2,079 12,993 Initial allowance on acquired PCD loans 1,077 3,651 1,504 37 — 737 7,006 Charge-offs (12,113) (2,487) (602) (3) (1,521) (459) (17,185) Recoveries 1,688 2,083 196 454 963 172 5,556 Balance, end of year $ 63,825 $ 35,877 $ 17,560 $ 14,536 $ 7,927 $ 5,316 $ 145,041 The ACL on sponsor finance loans, which is included in the categories above, represented $18.2 million and $19.0 million as of December 31, 2021 and 2020, respectively. On January 1, 2020, the Company adopted the CECL methodology which added $28.4 million to the ACL on loans. Upon adoption, $1.7 million of nonaccrual PCD loans with individual outstanding balances of less than $100,000 were immediately charged-off. Under the CECL method, the Company recorded $13.0 million and $63.4 million in provision for credit losses on loans for the years ended December 31, 2021 and 2020, respectively. An additional provision for credit losses of $0.4 million and $2.0 million was recorded in 2021 and 2020, respectively, for HTM securities, unfunded commitments and the recapture of accrued interest on nonaccrual loans. In 2019, a $6.7 million provision for loan losses (excluding the allowance release on PCI loans) was recorded under the incurred loss method. Acquisition-related provision expense of $25.4 million and $8.6 million in 2021 and 2020, respectively, was included in the provision for credit losses. This expense, commonly referred to as the “CECL double-count”, is recognized when a loan portfolio is acquired. The CECL methodology incorporates various economic scenarios. The Company utilizes three forecasts in the model; Moody’s baseline, a stronger near-term growth upside and a moderate recession downside forecast. The Company weights these scenarios at 40%, 30%, and 30%, respectively, which added approximately $17.5 million to the ACL over the baseline model. These forecasts incorporate an expectation that government stimulus will decline, the Federal Reserve will wind down quantitative easing and begin raising the federal funds rate, and that the pandemic will begin to slowly recede. The Company has also recognized the risk posed by loans that have received multiple deferrals of principal and interest payments, including the hospitality sector, by allocating additional reserves to those segments. Some of the key risks to the forecasts that could result in future provision for credit losses are additional shutdowns and self-quarantines from another significant wave of COVID, continued or worsening supply-chain issues, labor supply and job growth worsens, or financial market conditions tighten. In addition to the CECL methodology, the Company incorporates qualitative adjustments into the ACL on loans to capture credit risks inherent within the loan portfolio that are not captured in the DCF model. Included in these risks are 1) changes in lending policies and procedures, 2) actual and expected changes in business and economic conditions, 3) changes in the nature and volume of the portfolio, 4) changes in lending management, 5) changes in volume and the severity of past due loans, 6) changes in the quality of the loan review system, 7) changes in the value of underlying collateral, 8) the existence and effect of concentrations of credit and 9) other factors such as the regulatory, legal and competitive environments and events such as natural disasters and pandemics. At December 31, 2021, the ACL on loans included a qualitative adjustment of approximately $39.1 million. Of this amount, approximately $8.6 million was allocated to Sponsor Finance loans due to their unsecured nature. The recorded investment in nonperforming loans by category at December 31, 2021 and 2020 is as follows: December 31, 2021 ($ in thousands) Non-accrual Restructured, accruing Loans over 90 days past due and still accruing interest Total nonperforming loans Nonaccrual loans with no allowance Commercial and industrial $ 17,052 $ 2,783 $ 1,703 $ 21,538 $ 5,685 Real estate: Commercial - investor owned 1,575 — — 1,575 168 Commercial - owner occupied 2,839 — — 2,839 2,550 Residential 1,971 76 1 2,048 1,348 Other 12 — 12 24 — Total $ 23,449 $ 2,859 $ 1,716 $ 28,024 $ 9,751 December 31, 2020 ($ in thousands) Non-accrual Restructured, accruing Loans over 90 days past due and still accruing interest Total nonperforming loans Nonaccrual loans with no allowance Commercial and industrial $ 18,158 $ 3,482 $ 130 $ 21,770 $ 8,316 Real estate: Commercial - investor owned 9,579 — — 9,579 716 Commercial - owner occupied 2,940 — — 2,940 6,024 Residential 4,112 77 — 4,189 — Other 29 — — 29 3,190 Total $ 34,818 $ 3,559 $ 130 $ 38,507 $ 18,246 The amortized cost basis of collateral-dependent nonperforming loans by class of loan is presented for the periods indicated: December 31, 2021 Type of Collateral (in thousands) Commercial Real Estate Residential Real Estate Blanket Lien Commercial and industrial $ 4,271 $ 209 $ 9,312 Real estate: Commercial - investor owned 169 1,200 — Commercial - owner occupied 2,807 32 — Residential — 2,048 — Total $ 7,247 $ 3,489 $ 9,312 December 31, 2020 Type of Collateral (in thousands) Commercial Real Estate Residential Real Estate Blanket Lien Other Commercial and industrial $ 8,316 $ — $ 394 $ — Real estate: Commercial - investor owned 9,579 — — — Commercial - owner occupied 2,940 — — — Residential — 4,135 — — Other — — — 17 Total $ 20,835 $ 4,135 $ 394 $ 17 The recorded investment by category for loans restructured during the years ended December 31, 2021 and 2020 is as follows: Year ended December 31, 2021 Year ended December 31, 2020 ($ in thousands, except for number of loans) Number of Loans Pre-Modification Outstanding Post-Modification Outstanding Number of Loans Pre-Modification Outstanding Post-Modification Outstanding Commercial and industrial — $ — $ — 3 $ 7,447 $ 7,447 Real estate: Residential 1 221 221 3 372 372 Total 1 $ 221 $ 221 6 $ 7,819 $ 7,819 Restructured loans primarily resulted from interest rate concessions. As of December 31, 2021, the Company allocated an immaterial amount in specific reserves to loans that have been restructured. Loans restructured that subsequently defaulted during the year ended December 31, 2021 are as follows: Year ended December 31, 2021 ($ in thousands, except for number of loans) Number of Loans Recorded Balance Real Estate: Residential 1 148 There were no restructured loans that subsequently defaulted during the year ended December 31, 2020. In response to the COVID-19 pandemic, the Company implemented short-term deferral programs allowing customers to primarily defer payments for up to 90 days. Deferrals under the CARES Act or interagency guidance are not included above as troubled debt restructurings. As of December 31, 2021, substantially all of these loans have returned to a current payment status. The aging of the recorded investment in past due loans by class and category at December 31, 2021 and 2020 is shown below: December 31, 2021 ($ in thousands) 30-89 Days 90 or More Total Current Total Commercial and industrial $ 24,447 $ 14,158 $ 38,605 $ 3,353,770 $ 3,392,375 Real estate: Commercial - investor owned 3,880 — 3,880 2,137,263 2,141,143 Commercial - owner occupied 10,070 289 10,359 2,025,426 2,035,785 Construction and land development 24 — 24 734,049 734,073 Residential 3,181 1,305 4,486 449,566 454,052 Other 37 11 48 260,166 260,214 Total $ 41,639 $ 15,763 $ 57,402 $ 8,960,240 $ 9,017,642 December 31, 2020 ($ in thousands) 30-89 Days 90 or More Total Current Total Commercial and industrial $ 8,652 $ 12,928 $ 21,580 $ 3,067,415 $ 3,088,995 Real estate: Commercial - investor owned 734 9,301 10,035 1,579,384 1,589,419 Commercial - owner occupied 328 4,647 4,975 1,493,433 1,498,408 Construction and land development 13 — 13 546,673 546,686 Residential 2,071 2,118 4,189 314,990 319,179 Other 1,731 50 1,781 180,467 182,248 Total $ 13,529 $ 29,044 $ 42,573 $ 7,182,362 $ 7,224,935 The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt, such as current financial information, historical payment experience, credit documentation, and current economic factors among other factors. This analysis is performed on a quarterly basis. The Company uses the following definitions for risk ratings: • Grades 1, 2, and 3 – Includes loans to borrowers with a continuous record of strong earnings, sound balance sheet condition and capitalization, ample liquidity with solid cash flow, and whose management team has experience and depth within their industry. • Grade 4 – Includes loans to borrowers with positive trends in profitability, satisfactory capitalization and balance sheet condition, and sufficient liquidity and cash flow. • Grade 5 – Includes loans to borrowers that may display fluctuating trends in sales, profitability, capitalization, liquidity, and cash flow. • Grade 6 – Includes loans to borrowers where an adverse change or perceived weakness has occurred, but may be correctable in the near future. Alternatively, this rating category may also include circumstances where the borrower is starting to reverse a negative trend or condition, or has recently been upgraded from a 7, 8, or 9 rating. • Grade 7 – Watch credits are borrowers that have experienced financial setback of a nature that is not determined to be severe or influence ‘ongoing concern’ expectations. Although possible, no loss is anticipated, due to strong collateral and/or guarantor support. • Grade 8 – Substandard credits will include those borrowers characterized by significant losses and sustained downward trends in balance sheet condition, liquidity, and cash flow. Repayment reliance may have shifted to secondary sources. Collateral exposure may exist and additional reserves may be warranted. • Grade 9 – Doubtful credits include borrowers that may show deteriorating trends that are unlikely to be corrected. Collateral values may appear insufficient for full recovery, therefore requiring a partial charge-off, or debt renegotiation with the borrower. The borrower may have declared bankruptcy or bankruptcy is likely in the near term. All doubtful rated credits will be on non-accrual. The recorded investment by risk category of the loans by class and year of origination is presented in the following tables as of the dates indicated: December 31, 2021 Term Loans by Origination Year (in thousands) 2021 2020 2019 2018 2017 Prior Revolving Loans Converted to Term Loans Revolving Loans Total Commercial and industrial Pass (1-6) $ 1,180,601 $ 477,374 $ 317,869 $ 132,851 $ 116,738 $ 82,846 $ 11,648 $ 854,102 $ 3,174,029 Watch (7) 35,005 17,502 9,404 9,880 12,217 10,979 4,037 53,595 152,619 Classified (8-9) 14,917 3,530 3,840 1,689 2,988 813 787 10,996 39,560 Total Commercial and industrial $ 1,230,523 $ 498,406 $ 331,113 $ 144,420 $ 131,943 $ 94,638 $ 16,472 $ 918,693 $ 3,366,208 Commercial real estate-investor owned Pass (1-6) $ 651,740 $ 476,946 $ 346,245 $ 146,107 $ 112,043 $ 217,808 $ 3,625 $ 68,236 $ 2,022,750 Watch (7) 16,871 35,908 32,755 1,003 502 17,478 300 2,062 106,879 Classified (8-9) 1,376 3,135 835 817 1,159 4,141 — 50 11,513 Total Commercial real estate-investor owned $ 669,987 $ 515,989 $ 379,835 $ 147,927 $ 113,704 $ 239,427 $ 3,925 $ 70,348 $ 2,141,142 Commercial real estate-owner occupied Pass (1-6) $ 604,975 $ 423,263 $ 278,830 $ 164,210 $ 140,515 $ 235,973 $ 250 $ 48,349 $ 1,896,365 Watch (7) 12,825 13,585 4,301 16,774 10,274 15,764 — 300 73,823 Classified (8-9) 2,048 556 9,181 17,016 6,432 6,959 — — 42,192 Total Commercial real estate-owner occupied $ 619,848 $ 437,404 $ 292,312 $ 198,000 $ 157,221 $ 258,696 $ 250 $ 48,649 $ 2,012,380 Construction real estate Pass (1-6) $ 310,140 $ 229,396 $ 70,531 $ 35,936 $ 14,860 $ 7,180 $ 568 $ 2,992 $ 671,603 Watch (7) 28,947 15,348 60 1,199 11,068 2,330 — — 58,952 Classified (8-9) — — 387 419 — 22 — — 828 Total Construction real estate $ 339,087 $ 244,744 $ 70,978 $ 37,554 $ 25,928 $ 9,532 $ 568 $ 2,992 $ 731,383 Residential real estate Pass (1-6) $ 116,352 $ 66,481 $ 21,356 $ 14,841 $ 24,778 $ 103,840 $ 9,980 $ 87,146 $ 444,774 Watch (7) 2,425 2 622 1,157 248 1,305 — 79 5,838 Classified (8-9) 414 169 554 — 12 2,024 — — 3,173 Total residential real estate $ 119,191 $ 66,652 $ 22,532 $ 15,998 $ 25,038 $ 107,169 $ 9,980 $ 87,225 $ 453,785 Other Pass (1-6) $ 108,209 $ 68,806 $ 22,684 $ 23,145 $ 6,924 $ 13,832 $ 1,500 $ 9,166 $ 254,266 Watch (7) — — — 4 — 2,440 — 1 2,445 Classified (8-9) — — 10 10 — 16 — 2 38 Total Other $ 108,209 $ 68,806 $ 22,694 $ 23,159 $ 6,924 $ 16,288 $ 1,500 $ 9,169 $ 256,749 Total loans classified by risk category $ 3,086,845 $ 1,832,001 $ 1,119,464 $ 567,058 $ 460,758 $ 725,750 $ 32,695 $ 1,137,076 $ 8,961,647 Total loans classified by performing status 55,995 Total loans $ 9,017,642 December 31, 2020 Term Loans by Origination Year (in thousands) 2020 2019 2018 2017 2016 Prior Revolving Loans Converted to Term Loans Revolving Loans Total Commercial and industrial Pass (1-6) $ 1,402,276 $ 454,729 $ 262,258 $ 132,832 $ 25,057 $ 58,315 $ 14,118 $ 527,170 $ 2,876,755 Watch (7) 44,922 15,369 9,585 7,509 19,613 110 — 60,448 157,556 Classified (8-9) 6,602 9,219 3,115 3,964 4,490 1,080 1,281 22,432 52,183 Total Commercial and industrial $ 1,453,800 $ 479,317 $ 274,958 $ 144,305 $ 49,160 $ 59,505 $ 15,399 $ 610,050 $ 3,086,494 Commercial real estate-investor owned Pass (1-6) $ 481,867 $ 338,843 $ 189,305 $ 131,718 $ 138,288 $ 161,439 $ 6,509 $ 32,058 $ 1,480,027 Watch (7) 32,308 19,722 6,656 — 9,647 17,370 — — 85,703 Classified (8-9) — 5,278 8,716 5,830 1,245 2,620 — — 23,689 Total Commercial real estate-investor owned $ 514,175 $ 363,843 $ 204,677 $ 137,548 $ 149,180 $ 181,429 $ 6,509 $ 32,058 $ 1,589,419 Commercial real estate-owner occupied Pass (1-6) $ 419,142 $ 287,001 $ 215,181 $ 179,382 $ 104,470 $ 167,456 $ 2,672 $ 45,323 $ 1,420,627 Watch (7) 13,657 5,257 3,113 6,198 4,338 8,460 1,776 941 43,740 Classified (8-9) 2,420 7,427 5,822 6,140 1,309 10,860 — 63 34,041 Total Commercial real estate-owner occupied $ 435,219 $ 299,685 $ 224,116 $ 191,720 $ 110,117 $ 186,776 $ 4,448 $ 46,327 $ 1,498,408 Construction real estate Pass (1-6) $ 223,069 $ 156,360 $ 45,460 $ 18,579 $ 11,539 $ 9,144 $ — $ 28,880 $ 493,031 Watch (7) 2,544 86 34,179 11,632 — 2,499 — — 50,940 Classified (8-9) 56 2,124 503 1 — 31 — — 2,715 Total Construction real estate $ 225,669 $ 158,570 $ 80,142 $ 30,212 $ 11,539 $ 11,674 $ — $ 28,880 $ 546,686 Residential real estate Pass (1-6) $ 57,059 $ 27,907 $ 17,718 $ 17,138 $ 27,443 $ 92,657 $ 1,172 $ 66,902 $ 307,996 Watch (7) 210 840 526 — 514 1,603 287 511 4,491 Classified (8-9) 571 733 121 14 898 3,181 — 253 5,771 Total residential real estate $ 57,840 $ 29,480 $ 18,365 $ 17,152 $ 28,855 $ 97,441 $ 1,459 $ 67,666 $ 318,258 Other Pass (1-6) $ 43,526 $ 28,195 $ 30,074 $ 9,646 $ 5,641 $ 17,027 $ — $ 40,779 $ 174,888 Watch (7) — 1 8 — — 2,637 — 1 2,647 Classified (8-9) — 18 19 13 — 17 8 4 79 Total Other $ 43,526 $ 28,214 $ 30,101 $ 9,659 $ 5,641 $ 19,681 $ 8 $ 40,784 $ 177,614 Total loans classified by risk category $ 2,730,229 $ 1,359,109 $ 832,359 $ 530,596 $ 354,492 $ 556,506 $ 27,823 $ 825,765 $ 7,216,879 Total loans classified by performing status 8,056 Total loans $ 7,224,935 In the tables above, loan originations in 2021 and 2020 with a classification of watch or classified primarily represent renewals or modifications initially underwritten and originated in prior years. For certain loans, primarily credit cards, the Company evaluates credit quality based on the aging status. The following tables present the recorded investment on loans based on aging status: December 31, 2021 (in thousands) Performing Non Performing Total Commercial and industrial $ 26,166 $ 1 $ 26,167 Real estate: Commercial - investor owned 1 — 1 Commercial - owner occupied 23,405 — 23,405 Construction and land development 2,690 — 2,690 Residential 267 — 267 Other 3,453 12 3,465 Total $ 55,982 $ 13 $ 55,995 December 31, 2020 (in thousands) Performing Non Performing Total Commercial and industrial $ 2,502 $ — $ 2,502 Real estate: Residential 921 — 921 Other 4,612 21 4,633 Total $ 8,035 $ 21 $ 8,056 The Company has purchased loans, for which there was, at acquisition, evidence of more than insignificant deterioration of credit quality since origination. The carrying amount of those loans is as follows: ($ in thousands) At July 21, 2021 Par value of acquired loans $ 180,440 Allowance for credit losses (7,006) Non-credit discount (6,428) Purchase price of acquired loans $ 167,006

Leases (Notes)

Leases (Notes)	12 Months Ended
	Dec. 31, 2021
Leases, Operating Leases [Abstract]
Lessee, Operating Leases [Text Block]	LEASES The Company has banking and limited-service facilities, datacenters, and certain equipment lea sed under agreements. Most of the leases expire between 2022 and 2027 and include one or more renewal options for up to 5 years. One lease expires in 2031. All leases are classified as operating leases. For the twelve months ended ($ in thousands) December 31, 2021 December 31, 2020 Operating lease cost $ 4,877 $ 3,207 Short-term lease cost 833 201 Total lease cost $ 5,710 $ 3,408 Payments on operating leases included in the measurement of lease liabilities during the twelve months ended December 31, 2021 and 2020 totaled $5.2 million and $3.3 million, respectively. Right-of-use assets obtained in exchange for lease obligations totaled $5.7 million and $1.6 million during the twelve months ended December 31, 2021 and 2020, respectively. The additions in 2021 and 2020 were primarily from the First Choice acquisition and Seacoast acquisition, respectively. In 2021, an impairment of $1.1 million was recognized on right-of-use assets concurrent with the announced closure of certain leased locations. For further discussion see “Note 8 - Fixed Assets.” Supplemental balance sheet information related to leases is as follows: ($ in thousands) December 31, 2021 December 31, 2020 Operating lease right-of-use assets, included in other assets $ 13,483 $ 13,636 Operating lease liabilities, included in other liabilities 14,865 14,152 Operating leases Weighted average remaining lease term 4 years 5 years Weighted average discount rate 2.0 % 2.5 % Maturities of operating lease liabilities are as follows: ($ in thousands) Year Amount 2022 $ 5,191 2023 3,688 2024 2,670 2025 1,326 2026 1,138 Thereafter 1,566 Total operating lease liabilities, payments 15,579 Less: present value adjustment 714 Operating lease liabilities $ 14,865 Lessor income was $1.9 million

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	DERIVATIVE FINANCIAL INSTRUMENTS Risk Management Objective of Using Derivatives The Company is exposed to certain risk arising from both its business operations and economic conditions. The Company principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company manages economic risks, including interest rate, liquidity, and credit risk primarily by managing the amount, sources, and duration of its assets and liabilities and the use of derivative financial instruments. Specifically, the Company enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. The Company’s derivative financial instruments are used to manage differences in the amount, timing, and duration of the Company’s known or expected cash receipts and its known or expected cash payments principally related to the Company’s borrowings. The Company does not enter into derivative financial instruments for trading purposes. Cash Flow Hedges of Interest Rate Risk The Company’s objectives in using interest rate derivatives are to add stability to interest expense and to manage its exposure to interest rate movements. To accomplish this objective, the Company primarily uses interest rate swaps as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable amounts from a counterparty in exchange for the Company making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. The Company has executed a series of cash flow hedges to fix the effective interest rate for payments due on $62.0 million of LIBOR-based junior subordinated debentures to a weighted-average-fixed rate of 2.62%. Select terms of the hedges are as follows: $ in thousands Notional Fixed Rate Maturity Date $15,465 2.60% March 15, 2024 $14,433 2.60% March 30, 2024 $18,558 2.64% March 15, 2026 $13,506 2.64% March 17, 2026 For derivatives designated and qualified as cash flow hedges of interest rate risk, the gain or loss on the derivative is recorded in accumulated other comprehensive income and subsequently reclassified into interest expense in the same period(s) during which the hedged transaction affects earnings. Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest expense as interest payments are paid on the Company’s variable-rate debt. During the next twelve months, the Company estimates an additional $1.3 million will be reclassified as an increase to interest expense. Concurrently with the repayment of $200 million of variable-rate FHLB advances in the fourth quarter of 2020, the Company terminated two interest rate swaps with a notional value of $200.0 million. A loss of $3.2 million was recognized on the termination of the swaps. Non-designated Hedges Derivatives not designated as hedges are not considered speculative and result from a service the Company provides to certain customers. The Company executes interest rate swaps with commercial banking customers to facilitate their respective risk management strategies. Those interest rate swaps are simultaneously hedged by offsetting derivatives that the Company executes with a third party, such that the Company minimizes its net risk exposure resulting from such transactions. As the interest rate derivatives associated with this program do not meet the strict hedge accounting requirements, changes in the fair value of both the customer derivatives and the offsetting derivatives are recognized directly in earnings as a component of other noninterest income. The table below presents the fair value of the Company’s derivative financial instruments as well as their classification on the Balance Sheet as of December 31, 2021 and December 31, 2020. Notional Amount Derivative Assets Derivative Liabilities ($ in thousands) December 31, 2021 December 31, 2020 December 31, 2021 December 31, 2020 December 31, 2021 December 31, 2020 Derivatives designated as hedging instruments Interest rate swaps $ 61,962 $ 61,962 $ — $ — $ 2,911 $ 5,987 Derivatives not designated as hedging instruments Interest rate swaps $ 918,698 $ 1,026,016 $ 12,869 $ 28,703 $ 12,883 $ 28,980 The tables below present a gross presentation, the effects of offsetting, and a net presentation of the Company’s financial instruments subject to offsetting as of December 31, 2021 and December 31, 2020. The gross amounts of assets or liabilities can be reconciled to the tabular disclosure of fair value. The tabular disclosure of fair value provides the location that financial assets and liabilities are presented on the Balance Sheet. As of December 31, 2021 Gross Amounts Not Offset in the Statement of Financial Position ($ in thousands) Gross Amounts Recognized Gross Amounts Offset in the Statement of Financial Position Net Amounts of Assets presented in the Statement of Financial Position Financial Instruments Fair Value Collateral Posted Net Amount Assets: Interest rate swaps $ 12,869 $ — $ 12,869 $ 1,033 $ — $ 11,836 Liabilities: Interest rate swaps $ 15,794 $ — $ 15,794 $ 1,033 $ 14,031 $ 730 Securities sold under agreements to repurchase 331,006 — 331,006 — 331,006 — As of December 31, 2020 Gross Amounts Not Offset in the Statement of Financial Position ($ in thousands) Gross Amounts Recognized Gross Amounts Offset in the Statement of Financial Position Net Amounts of Assets presented in the Statement of Financial Position Financial Instruments Fair Value Collateral Posted Net Amount Assets: Interest rate swaps $ 28,703 $ — $ 28,703 $ 2 $ — $ 28,701 Liabilities: Interest rate swaps $ 34,967 $ — $ 34,967 $ 2 $ 34,903 $ 62 Securities sold under agreements to repurchase 271,081 — 271,081 — 271,081 —

Fixed Assets

Fixed Assets	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Fixed Assets	FIXED ASSETS A summary of fixed assets at December 31, 2021 and 2020, is as follows: December 31, ($ in thousands) 2021 2020 Land $ 12,849 $ 13,389 Buildings and leasehold improvements 52,012 53,007 Furniture, fixtures and equipment 18,821 17,933 83,682 84,329 Less accumulated depreciation and amortization 35,767 31,160 Total fixed assets $ 47,915 $ 53,169 Depreciation and amortization of fixed assets included in noninterest expense amounted to $6.1 million, $6.2 million, and $5.7 million in 2021, 2020, and 2019, respectively.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	GOODWILL AND INTANGIBLE ASSETS The table below presents a summary of goodwill: ($ in thousands) Years ended December 31, 2021 2020 Goodwill, beginning of year $ 260,567 $ 210,344 Additions from acquisition 104,597 50,223 Goodwill, end of year $ 365,164 $ 260,567 The table below presents a summary of intangible assets: ($ in thousands) Years ended December 31, 2021 2020 Core deposit intangible, net, beginning of year $ 23,084 $ 26,076 Additions from acquisition 4,892 2,681 Amortization (5,690) (5,673) Core deposit intangible, net, end of year $ 22,286 $ 23,084 Amortization expense on the core deposit intangibles was $5.7 million for the each of the years ended December 31, 2021 and 2020, and $5.5 million for the year ended December 31, 2019. The core deposit intangibles are being amortized over a 10-year period. The following table reflects the amortization schedule for the core deposit intangible at December 31, 2021. Year Core Deposit Intangible ($ in thousands) 2022 $ 5,367 2023 4,601 2024 3,834 2025 3,068 2026 2,301 After 2026 3,115 $ 22,286

Deposits

Deposits	12 Months Ended
	Dec. 31, 2021
Maturities of Time Deposits [Abstract]
Maturity of Certificates of Deposit	DEPOSITS Following is a summary of certificates of deposit maturities at December 31, 2021: ($ in thousands) Brokered Customer Total Less than 1 year $ 10,062 $ 365,902 $ 375,964 Greater than 1 year and less than 2 years 61,173 67,859 129,032 Greater than 2 years and less than 3 years 37,847 21,010 58,857 Greater than 3 years and less than 4 years 19,888 14,238 34,126 Greater than 4 years and less than 5 years — 5,564 5,564 Greater than 5 years — 4,750 4,750 $ 128,970 $ 479,323 $ 608,293 Certificates of deposit balances over the FDIC insurance limit of $250,000 were $93.7 million as of December 31, 2021. At December 31, 2021, deposit accounts of executive officers and directors, or to entities in which such individuals had beneficial interests as a shareholder, officer, or director totaled $5.7 million. The Company is a participant in the Promontory Interfinancial Network, a network that offers deposit placement services such as CDARS and ICS, which offers products that qualify large deposits for FDIC insurance. At December 31, 2021, the Company had $22.0 million of CDARS deposits and $118.2 million of ICS deposits. At December 31, 2021 and 2020, overdraft deposits of $1.3 million and $1.0 million, respectively, were reclassified to loans.

Subordinated Debentures

Subordinated Debentures	12 Months Ended
	Dec. 31, 2021
Subordinated Borrowings [Abstract]
Subordinated Debentures	SUBORDINATED DEBENTURES The amounts and terms of each issuance of the Company’s subordinated debentures at December 31, 2021 and 2020 were as follows: Amount Maturity Date Initial Call Date (1) Interest Rate ($ in thousands) 2021 2020 EFSC Clayco Statutory Trust I $ 3,196 $ 3,196 December 17, 2033 December 17, 2008 Floats 3MO LIBOR + 2.85% EFSC Capital Trust II 5,155 5,155 June 17, 2034 June 17, 2009 Floats 3MO LIBOR + 2.65% EFSC Statutory Trust III 11,341 11,341 December 15, 2034 December 15, 2009 Floats 3MO LIBOR + 1.97% EFSC Clayco Statutory Trust II 4,124 4,124 September 15, 2035 September 15, 2010 Floats 3MO LIBOR + 1.83% EFSC Statutory Trust IV 10,310 10,310 December 15, 2035 December 15, 2010 Floats 3MO LIBOR + 1.44% EFSC Statutory Trust V 4,124 4,124 September 15, 2036 September 15, 2011 Floats 3MO LIBOR + 1.60% EFSC Capital Trust VI 14,433 14,433 March 30, 2037 March 30, 2012 Floats 3MO LIBOR + 1.60% EFSC Capital Trust VII 4,124 4,124 December 15, 2037 December 15, 2012 Floats 3MO LIBOR + 2.25% JEFFCO Stat Trust I (2) 7,732 7,752 February 22, 2031 February 22, 2011 Fixed 10.20% JEFFCO Stat Trust II (2) 4,496 4,443 March 17, 2034 March 17, 2009 Floats 3MO LIBOR + 2.75% Trinity Capital Trust III (2) 5,339 5,272 September 8, 2034 September 8, 2009 Floats 3MO LIBOR + 2.70% Trinity Capital Trust IV 10,310 10,310 November 23, 2035 August 23, 2010 Fixed 6.88% Trinity Capital Trust V (2) 7,869 7,706 December 15, 2036 September 15, 2011 Floats 3MO LIBOR + 1.65% Total junior subordinated debentures 92,553 92,290 5.75% Fixed-to-floating rate subordinated notes 63,250 63,250 June 1, 2030 June 1, 2025 Fixed 5.75% until 4.75% Fixed-to-floating rate subordinated notes — 50,000 November 1, 2026 November 1, 2021 Fixed 4.75% until Debt issuance costs (904) (1,903) Total fixed-to-floating rate subordinated notes 62,346 111,347 Total subordinated debentures and notes $ 154,899 $ 203,637 (1) Callable each quarter after initial call date. (2) Purchase accounting adjustments are reflected in the balance and also impact the effective interest rate. The Company has 13 unconsolidated statutory business trusts. These trusts issued preferred securities that were sold to third parties. The sole purpose of the trusts was to invest the proceeds in junior subordinated debentures of the Company that have terms identical to the trust preferred securities. The subordinated debentures, which are the sole assets of the trusts, are subordinate and junior in right of payment to all present and future senior and subordinated indebtedness and certain other financial conditions of the Company. The Company fully and unconditionally guarantees each trust’s securities obligations. Under current regulations, the trust preferred securities are included in tier 1 capital for regulatory capital purposes, subject to certain limitations. The trust preferred securities are redeemable in whole or in part on or after their respective call dates. Mandatory redemption dates may be shortened if certain conditions are met. The securities are classified as subordinated debentures in the Company’s consolidated balance sheets. Interest on the subordinated debentures held by the trusts is recorded as interest expense in the Company’s consolidated statements of operations. The Company’s investment of $2.9 million at December 31, 2021, in these trusts is included in other investments in the consolidated balance sheets. The Company has fixed the interest rate on a portion of its junior subordinated debentures through a series of interest rate swaps. For further discussion of the interest rate swaps and the corresponding terms, see “Note 7 - Derivative Financial Instruments.”

Federal Home Loan Bank Advances

Federal Home Loan Bank Advances	12 Months Ended
	Dec. 31, 2021
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Federal Home Loan Bank Advances	FEDERAL HOME LOAN BANK ADVANCES FHLB advances are collateralized by 1-4 family residential real estate loans, business loans, and certain commercial real estate loans. At December 31, 2021 and 2020, the carrying value of the loans pledged to the FHLB of Des Moines was $1.4 billion at both periods. The secured line of credit had availability of approximately $708.6 million at December 31, 2021. The following table summarizes the type, maturity, and rate of the Company’s FHLB advances at December 31: 2021 2020 ($ in thousands) Term Outstanding Balance Weighted Rate Outstanding Balance Weighted Rate Non-amortizing fixed advance Greater than 1 year $ 50,000 1.56 % $ 50,000 1.56 % In August 2019, the Company entered into agreements totaling $50 million for convertible advances with a weighted average rate of 1.56% that mature in 2024 and are currently puttable by the FHLB. At December 31, 2021, the Company used $60.0 million of collateral value to secure confirming letters of credit for public unit deposits and industrial development bonds.

Other Borrowings and Notes Paya

Other Borrowings and Notes Payable	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Other Borrowings and Notes Payable	OTHER BORROWINGS Securities Sold Under Agreement to Repurchase The Company enters into sales of securities under agreements to repurchase. The agreements are transacted with deposit customers and are utilized as an overnight investment product. The amounts received under these agreements represent short-term borrowings and are reflected as a liability in the consolidated balance sheets. The securities underlying these agreements are included in investment securities in the Consolidated Balance Sheets. The Company has no control over the market value of the securities, which fluctuates due to market conditions. However, the Company is obligated to promptly transfer additional securities if the market value of the securities falls below the repurchase agreement price. The Company manages this risk by maintaining an unpledged securities portfolio that it believes is sufficient to cover a decline in the market value of the securities sold under agreements to repurchase. A summary of securities sold under agreements to repurchase is as follows: December 31, ($ in thousands) 2021 2020 Securities sold under agreement to repurchase $ 331,006 $ 271,081 Average balance during the year 225,895 206,338 Maximum balance outstanding at any month-end 331,006 271,081 Average interest rate during the year 0.10 % 0.23 % Average interest rate at December 31 0.06 % 0.07 % Federal Reserve Line The Bank also has a line with the Federal Reserve Bank of St. Louis which provides additional liquidity to the Company. As of December 31, 2021, $1.1 billion was available under this line. This line is secured by a pledge of certain eligible loans aggregating $1.3 billion. There were no amounts drawn on the Federal Reserve line of credit as of December 31, 2021. Federal Reserve PPPLF The Company acquired $86.1 million of Federal Reserve PPPLF funds from the Seacoast acquisition which were paid off in November 2020. Revolving Credit Line In February 2016, the Company entered into a senior unsecured revolving credit agreement (the “Revolving Agreement”) with another bank. The Revolving Agreement has a one-year term, maturing on February 22, 2022. It allows for borrowings up to $25 million. The interest rate is the one-month LIBOR plus 125 basis points. The proceeds can be used for general corporate purposes. The Revolving Agreement is subject to ongoing compliance with a number of customary affirmative and negative covenants as well as specified financial covenants. In February 2022, the Revolving Agreement was renewed for a one-year term and the interest rate was amended to one-month Term SOFR plus 136 basis points. The revolving credit line was not accessed in 2021 or 2020. Term Loan In February 2019, the Company entered into a five year, $40.0 million unsecured term loan agreement (the “Term Loan”) with another bank with the proceeds primarily used to fund the company’s cash portion of an acquisition in 2019. The interest rate is one-month LIBOR plus 125 basis points. In February 2022, the interest rate on the Term Loan was amended to one-month Term SOFR plus 136 basis points. A summary of the Term Loan is as follows: December 31, ($ in thousands) 2021 2020 Term Loan $ 22,857 $ 30,000 Average balance during the year 26,427 32,123 Maximum balance outstanding at any month-end 28,571 34,286 Weighted average interest rate during the year 1.40 % 1.96 % Average interest rate at December 31 1.38 % 1.44 %

Litigation and Other Contingenc

Litigation and Other Contingencies	12 Months Ended
	Dec. 31, 2021
Other Liabilities Disclosure [Abstract]
Litigation and Other Contingencies	LITIGATION AND OTHER CONTINGENCIES The Company and its subsidiaries are, from time to time, parties to various legal proceedings arising out of their businesses. Management believes there are no such legal proceedings pending or threatened against the Company or its subsidiaries in the ordinary course of business, directly, indirectly, or in the aggregate that, if determined adversely, would have a material adverse effect on the business, consolidated financial condition, results of operations or cash flows of the Company or any of its subsidiaries.

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2021
Regulated Operations [Abstract]
Regulatory Matters	REGULATORY CAPITAL Quantitative measures established by regulation to ensure capital adequacy require the Bank to maintain minimum ratios (set forth in the following table) of total, tier 1, and common equity tier 1 capital to risk-weighted assets, and of tier 1 capital to average assets. Management believes, as of December 31, 2021 and 2020, that the Company met all capital adequacy requirements to which it is subject. As of December 31, 2021 and 2020, the Bank was categorized as “well-capitalized” under the regulatory framework for prompt corrective action. To be categorized as “well-capitalized” the Bank must maintain minimum total risk-based capital, tier 1 risk-based capital, common equity tier 1 risk-based capital, and tier 1 leverage ratios as set forth in the table. In addition, the Company must maintain an additional CCB above the regulatory minimum ratio requirements. The CCB is designed to insulate banks from periods of stress and impose constraints on dividends, share repurchases and discretionary bonus payments when capital levels fall below prescribed levels. The capital ratios are presented in the following table: December 31, 2021 December 31, 2020 EFSC Bank EFSC Bank To Be Well-Capitalized Minimum Ratio Common Equity Tier 1 Capital to Risk Weighted Assets 11.3 % 12.5 % 10.9 % 12.5 % 6.5 % 7.0 % Tier 1 Capital to Risk Weighted Assets 13.0 % 12.5 % 12.1 % 12.5 % 8.0 % 8.5 % Total Capital to Risk Weighted Assets 14.7 % 13.5 % 14.9 % 13.7 % 10.0 % 10.5 % Leverage Ratio (Tier 1 Capital to Average Assets) 9.7 % 9.3 % 10.0 % 10.3 % 5.0 % 4.0 %

Compensation Plans

Compensation Plans	12 Months Ended
	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Compensation Plans	SHAREHOLDERS’ EQUITY AND COMPENSATION PLANS Shareholders’ Equity Common Stock At December 31, 2021 and 2020, the Company has reserved the following shares of its authorized but unissued common stock for possible future issuance in connection with the following: December 31, 2021 December 31, 2020 Outstanding performance units (maximum issuance) 169,244 125,176 Outstanding RSU’s 181,657 157,428 Outstanding options and appreciation rights 112,927 — 2018 Stock Incentive Plan 670,326 339,691 Non-Management Director Plan 73,618 86,616 2018 Employee Stock Purchase Plan 571,064 635,890 Total 1,778,836 1,344,801 Common Stock Repurchase Plan In April 2021, the Company’s board of directors authorized the repurchase of up to two million shares of the Company’s common stock. The repurchases may be made in open market or privately negotiated transactions and the stock repurchase program will remain in effect until fully utilized or until modified, superseded or terminated. At December 31, 2021, there were 700,473 shares available for repurchase under the plan. Preferred Stock The Company has 5,000,000 shares of authorized preferred stock with a par value of $0.01 with 75,000 shares issued and outstanding at the end of 2021. The Board of Directors has the right to set for each series of preferred stock, subject to the laws of the State of Delaware, the dividend rate, conversion and redemption terms, voting rights and liquidation preferences, among others. In the fourth quarter 2021, the Company issued and sold 3,000,000 depositary shares, each representing 1/40th interest in a share of the Company’s 5% Noncumulative, Perpetual Preferred Stock, Series A (“Series A Preferred Stock”), totaling $72.0 million, net of issuance costs. The depositary shares trade under the ticker “EFSCP”. The Series A Preferred Stock may be redeemed at the Company’s option, subject to prior regulatory approval, in whole or in part on any dividend payment date on or after December 15, 2026 or within 90 days following a regulatory capital event, as defined in the offering documents. If any Series A Preferred Stock are redeemed, a proportionate number of depositary shares will also be redeemed. Dividends, when and if declared by the board of directors, are payable, quarterly in arrears, on March 15, June 15, September 15 and December 15 of each year. If dividends on the Series A Preferred stock have not been declared or paid in six quarterly periods, whether or not consecutive, the number of directors on the board will automatically be increased by two and the holders of the Series A preferred stock will be entitled to vote for the additional directors. Dividends The Company’s ability to pay dividends to its shareholders is generally dependent upon the payment of dividends by the Bank to the parent company. The Bank cannot pay dividends to the extent it would be deemed undercapitalized by the FDIC after making such dividend. Dividends on the Company’s capital stock are prohibited under the terms of the junior subordinated debenture agreements, see “Note 11 - Subordinated Debentures,” if the Company is in continuous default on its payment obligations to the capital trusts, has elected to defer interest payments on the debentures or extends the interest payment period. Furthermore, unless dividends on all outstanding shares of the Series A Preferred Stock for the most recently completed dividend period have been paid or declared, dividends on, and repurchases of, common stock is prohibited. At December 31, 2021, the Company was not in default on any of the junior subordinated debenture issuances or preferred stock. Accumulated Other Comprehensive Income (Loss) The following table presents the changes in accumulated other comprehensive income (loss) after-tax by component: ($ in thousands) Net Unrealized Gain (Loss) on Available-for-Sale Debt Securities Unamortized Gain (Loss) on Held-to-Maturity Securities Net Unrealized Loss on Cash Flow Hedges Total Balance, December 31, 2018 $ (9,047) $ (235) $ — $ (9,282) Net change 29,226 (33) (2,162) 27,031 Transfer from available-for-sale to held-to-maturity (5,202) 5,202 — — Balance, December 31, 2019 $ 14,977 $ 4,934 $ (2,162) $ 17,749 Net change 23,627 (1,910) (2,346) 19,371 Transfer from available-for-sale to held-to-maturity (16,284) 16,284 — — Balance, December 31, 2020 $ 22,320 $ 19,308 $ (4,508) $ 37,120 Net change (17,049) (3,624) 2,330 (18,343) Balance, December 31, 2021 $ 5,271 $ 15,684 $ (2,178) $ 18,777 The following table presents the pre-tax and after-tax changes in the components of other comprehensive income: 2021 2020 2019 ($ in thousands) Pre-tax Tax effect After-tax Pre-tax Tax effect After-tax Pre-tax Tax effect After-tax Change in unrealized gain (loss) on available-for-sale debt securities $ (22,701) $ (5,652) $ (17,049) $ 31,798 $ 7,854 $ 23,944 $ 38,764 $ 9,575 $ 29,189 Reclassification adjustment for realized (gain) loss on sale of available-for-sale debt securities(a) — — — (421) (104) (317) 49 12 37 Reclassification of gain on held-to-maturity securities(b) (4,672) (1,048) (3,624) (2,537) (627) (1,910) (44) (11) (33) Change in unrealized gain (loss) on cash flow hedges arising during the period(b) 1,533 372 1,161 (7,898) (1,951) (5,947) (3,004) (742) (2,262) Reclassification of loss on cash flow hedges(b) 1,543 374 1,169 4,782 1,181 3,601 133 33 100 Total other comprehensive income (loss) $ (24,297) $ (5,954) $ (18,343) $ 25,724 $ 6,353 $ 19,371 $ 35,898 $ 8,867 $ 27,031 (a) The pre-tax amount is reported in noninterest income/expense in the Consolidated Statements of Operations. (b) The pre-tax amount is reported in interest income/expense in the Consolidated Statements of Operations, except for a $3.2 million termination fee in 2020 recognized in noninterest expense. Compensation Plans The Company has adopted share-based compensation plans to reward and provide long-term incentive for directors and key employees of the Company including its subsidiaries. These plans provide for the granting of stock, stock options, stock-settled stock appreciation rights, and restricted stock units (“RSUs”), and may contain performance terms for key employees as designated by the Company’s Board of Directors upon the recommendation of the Compensation Committee of the Board. The Company uses authorized and unissued shares to satisfy share award exercises. The total excess income tax benefit (expense) for share-based compensation arrangements was $(0.1) million, $0.2 million, and $0.5 million for the years ended December 31, 2021, 2020, and 2019, respectively. At December 31, 2021, there was $8.2 million of total unrecognized compensation cost related to unvested share-based compensation awards. The cost is expected to be recognized over a weighted-average term of 2 years. The following table summarizes share-based compensation expense: ($ in thousands) 2021 2020 2019 Performance stock units $ 1,777 $ 1,097 $ 1,699 Restricted stock units 3,109 2,613 1,969 Stock options 396 — — Employee stock purchase plan 735 468 364 Total share-based compensation expense $ 6,017 $ 4,178 $ 4,032 Performance Units The Company has entered into long-term incentive agreements with certain key employees. These awards are conditioned on certain performance criteria and market criteria measured against a group of peer banks over a three-year period for each grant. The awards contain minimum (threshold), target, and maximum (exceptional) performance levels. In the event of a change in control, as defined in the plan, the awards will vest at a minimum of the target level. The amount of the awards is determined at the end of the three-year vesting and performance period. The fair value of performance units vesting in 2021, 2020, and 2019 were $0.9 million, $2.8 million, and $4.6 million, respectively. Information related to the outstanding grants at December 31, 2021 is shown below: ($ in thousands) 2019 - 2021 Cycle 2020 - 2022 Cycle 2021 - 2023 Cycle Shares issuable at target 19,576 24,674 40,372 Maximum shares issuable 39,152 49,348 80,744 Unrecognized compensation cost $ 27 $ 538 $ 1,981 Weighted average grant date fair value $ 47.46 $ 38.09 $ 47.16 Maximum Shares Issuable Outstanding at December 31, 2020 125,176 Granted 84,628 Vested (issued 23,251 shares) (31,452) Forfeited (9,108) Outstanding at December 31, 2021 169,244 Restricted Stock Units The Company awards nonvested stock, in the form of RSUs to employees. RSUs generally are subject to continued employment and generally vest ratably over three to five years. Vesting is accelerated upon a change in control or the employee meeting certain retirement criteria. RSUs do not carry voting or dividend rights until vested. Sales of the units are restricted prior to vesting. Various information related to the RSUs is shown below. ($ in thousands) 2021 2020 2019 Total fair value at vesting date $ 2,855 $ 1,702 $ 1,067 Unrecognized compensation cost 4,622 3,899 3,417 Expected years to recognize unearned compensation 1.9 years 1.9 years 1.9 years Weighted average grant date fair value $ 44.01 $ 39.63 $ 45.00 A summary of the status of the Company’s RSU awards as of December 31, 2021 and changes during the year then ended is presented below. Shares Weighted Average Outstanding at December 31, 2020 157,428 $ 42.44 Granted 100,220 44.01 Vested (65,755) 43.91 Forfeited (10,236) 43.51 Outstanding at December 31, 2021 181,657 $ 42.71 Stock Options In determining compensation cost for stock options, the Black-Scholes option-pricing model is used to estimate the fair value on date of grant. The model utilizes several assumptions in its calculations. The risk-free rate for periods within the contractual life of the option is based on the U.S. Treasury yield in effect at the time of the grant. The expected term of options granted is based on the option's vesting schedule and expected exercise patterns and represent the period of time that options granted are expected to be outstanding. The expected volatility is based on the historical volatility of the Company's stock and expected term of the option. The dividend yield is determined by annualizing the dividend rate as a percentage of the Company's stock price. The following weighted average assumptions were used for grants issued during the year ended December 31, 2021. Weighted Average Risk Free Interest Rate 1.06% Expected Dividend Yield 1.65% Expected Volatility 33.92% Expected Term (years) 6.2 Stock options have been granted to key employees with exercise prices equal to the market price of the Company’s common stock at the date of grant and 10-year contractual terms. Stock options have a vesting schedule of three Following is a summary of stock option activity for 2021. ($ in thousands, except per share data) Shares Weighted Weighted Outstanding at December 31, 2020 — $ — Granted 118,604 43.80 9.2 years Forfeited (5,677) 43.81 Outstanding at December 31, 2021 112,927 $ 43.80 9.2 years Exercisable at December 31, 2021 460 $ 43.81 9.2 years Employee Stock Purchase Plan The Company’s Employee Stock Purchase Plan (“ESPP”) provides its eligible employees with an opportunity to purchase common stock through accumulated payroll contributions. The ESPP provides for shares to be purchased at 85% of the lesser of the stock price at the enrollment date or the exercise date. The maximum number of shares of common stock available for sale under the ESPP is 750,000. In 2021, 2020, and 2019, employees purchased 64,826, 58,195, and 41,116 shares, respectively. Stock Plan for Non-Management Directors The Company has adopted a Stock Plan for Non-Management Directors, which provides for issuing up to 200,000 shares of common stock to non-management directors as compensation in lieu of cash. At December 31, 2021, there were 59,760 shares of stock available for grant under the Stock Plan for Non-Management Directors, exclusive of 13,858 shares to be issued upon deferral release. Various information related to the Director Plan is shown below. 2021 2020 2019 Shares granted 12,998 15,901 11,382 Weighted average grant date fair value $ 46.05 $ 30.28 $ 41.63 401(k) Plan The Company has a 401(k) savings plan which covers substantially all full-time employees over the age of 21 and matches 100% of the first 6% of employee contributions. The amount charged to expense for the Company’s contributions to the plan was $4.9 million, $3.8 million and $3.2 million for 2021, 2020, and 2019, respectively. Deferred Compensation Plan The Company’s Nonqualified Deferred Compensation Plan permits certain executives to participate and defer up to 25% of their base salary and/or up to 100% of their eligible bonus for a plan year. Participants make an irrevocable election when they elect to participate for a plan year to receive the vested account balance following their retirement date, or at a future date not less than five years after the beginning of the plan year. At December 31, 2021, the Company had a liability of $5.0 million related to the Deferred Compensation Plan.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES The components of income tax expense (benefit) for the years ended December 31, are as follows: Year ended December 31, ($ in thousands) 2021 2020 2019 Current: Federal $ 29,835 $ 25,132 $ 15,470 State and local 5,198 5,009 2,027 Total current 35,033 30,141 17,497 Deferred: Federal 870 (10,651) 4,262 State and local (325) (1,927) 1,538 Total deferred 545 (12,578) 5,800 Total income tax expense $ 35,578 $ 17,563 $ 23,297 A reconciliation of expected income tax expense, computed by applying the statutory federal income tax rate in 2021, 2020, and 2019 to income before income taxes and the amounts reflected in the consolidated statements of operations is as follows: Year ended December 31, ($ in thousands) 2021 2020 2019 Income tax expense at statutory rate $ 35,413 $ 19,309 $ 24,368 Increase (reduction) in income tax resulting from: Tax-exempt interest income, net (3,198) (2,010) (962) State and local income taxes, net 4,936 3,254 2,816 Bank-owned life insurance, net (713) (778) (628) Non-deductible expenses 1,090 637 749 Tax benefit of low-income housing tax credit ("LIHTC") investments, net (132) (444) (278) Excess tax benefits 146 (175) (526) Federal tax credits (1,136) (1,327) (913) Non-taxable donation to charitable foundation (263) — (420) Other, net (565) (903) (909) Total income tax expense $ 35,578 $ 17,563 $ 23,297 The net amount recognized as a component of tax expense for tax credits, other tax benefits, and amortization from LIHTC investments recognized per the table above was $0.1 million for the year ended December 31, 2021. The net amount recognized as a benefit component of income tax expense per the table above was $0.4 million for the year ended December 31, 2020, and $0.3 million for the year ended December 31, 2019. As of December 31, 2021 and 2020, the carrying value of the investments related to low-income housing tax credits was $7.6 million and $4.2 million, respectively. No impairment losses have been recognized from forfeiture or ineligibility of tax credits or other circumstances during the life of any of the investments. A net deferred income tax asset of $40.9 million and $29.8 million is included in other assets in the consolidated balance sheets at December 31, 2021 and 2020, respectively. The tax effect of temporary differences that gave rise to significant portions of the deferred tax assets and deferred tax liabilities is as follows: Year ended December 31, ($ in thousands) 2021 2020 Deferred tax assets: Allowance for loan losses $ 36,550 $ 34,031 Loans held-for-sale 6,971 8,058 Other real estate 305 896 Deferred compensation 2,704 2,585 Accrued compensation 5,881 5,391 Net operating losses and tax credits 6,061 6,460 Other deferred tax assets 5,671 3,086 Total deferred tax assets 64,143 60,507 Deferred tax liabilities: Acquired loans 1,709 3,413 Unrealized gains on securities 6,171 12,189 Intangible assets 8,789 7,800 Other deferred tax liabilities 3,754 4,369 Total deferred tax liabilities 20,423 27,771 Net deferred tax asset before valuation allowance 43,720 32,736 Less: valuation allowance 2,830 2,932 Net deferred tax asset $ 40,890 $ 29,804 As part of the Trinity Capital Corporation acquisition in 2019, the company acquired net operating loss, tax credit, and capital loss deferred tax assets. Net operating losses originated in the years 2012, 2014-2017, and 2019 and will expire in the years between 2032-2037. Tax credit carryforwards originated in years 2010-2015 and will expire in the years between 2030-2035. A valuation allowance is provided on deferred tax assets when it is more likely than not that some portion of the assets will not be realized. In 2019, as part of the Trinity Capital Corporation acquisition, the company acquired net operating loss, tax credit, and capital loss deferred tax assets. The company determined it was more likely than not that some of the assets would not be realized. As such, the company has a valuation allowance recorded of $2.8 million and $2.9 million as of December 31, 2021 and 2020, respectively. The Company and its subsidiaries file income tax returns in the federal jurisdiction and in thirty states. The Company is no longer subject to federal, state or local income tax audits by tax authorities for years before 2017, with the exception of 2016 being an open year by one state taxing authority. Net operating losses generated prior to 2016 that are utilized going forward would still be subject to examination. As of December 31, 2021, the gross amount of unrecognized tax benefits was $2.7 million and the total amount of net unrecognized tax benefits that would impact the effective tax rate, if recognized, was $2.5 million. As of December 31, 2020 and 2019, the total amount of the net unrecognized tax benefits that would impact the effective tax rate, if recognized, was $3.1 million and $1.1 million, respectively. The Company believes it is reasonably possible the gross amount of unrecognized benefits will be reduced by approximately $0.4 million as a result of a lapse of statute of limitations in the next 12 months. The Company is under audit by the state of Missouri, and while the Company has concluded it has adequately provided for uncertain tax positions, the outcome of such audits are always uncertain and could result in additional tax expense, though immaterial. The Company recognizes interest and penalties related to uncertain tax positions in income tax expense and classifies such interest and penalties in the liability for unrecognized tax benefits. The amount accrued for interest and penalties was $0.5 million as of December 31, 2021, $0.9 million for 2020 and was not significant for 2019. The activity in the gross liability for unrecognized tax benefits was as follows: ($ in thousands) 2021 2020 2019 Balance at beginning of year $ 3,157 $ 1,497 $ 1,301 Additions based on tax positions related to the current year 563 395 401 Additions for tax positions of prior years 436 1,556 62 Settlements for tax positions of prior years (1,289) — — Settlements or lapse of statute of limitations (170) (291) (267) Balance at end of year $ 2,697 $ 3,157 $ 1,497

Commitments

Commitments	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments	COMMITMENTS Long-term Lease Commitments See “Note 6 – Leases” in this report for information regarding the Company’s long-term lease commitments. Off-balance-Sheet Commitments The Company issues financial instruments in the normal course of the business of meeting the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. These instruments may involve, to varying degrees, elements of credit and interest rate risk in excess of the amounts recognized in the consolidated balance sheets. The Company’s extent of involvement and maximum potential exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit and standby letters of credit is not more than the contractual amount of these instruments. The Company uses the same credit policies in making commitments and conditional obligations as it does for financial instruments included on its consolidated balance sheets. The contractual amounts of off-balance-sheet financial instruments as of December 31, 2021, and December 31, 2020, are as follows: (in thousands) December 31, 2021 December 31, 2020 Commitments to extend credit $ 2,481,173 $ 1,946,068 Letters of credit 77,314 50,971 State tax credits 18,118 24,473 Limited partnership commitments 21,553 23,400 There was an insignificant amount of unadvanced commitments on impaired loans at December 31, 2021 and December 31, 2020. Other liabilities include approximately $7.6 million for an allowance for credit losses attributable to unadvanced commitments at December 31, 2021. 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 usually have fixed expiration dates or other termination clauses, may have significant usage restrictions, and may require payment of a fee. Of the total commitments to extend credit at December 31, 2021, and December 31, 2020, $238.7 million and $160.6 million, respectively, represent fixed rate loan commitments. Since certain of the commitments may expire without being drawn upon or may be revoked, the total commitment amounts do not necessarily represent future cash obligations. The Company evaluates each customer’s credit worthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the borrower. Collateral held varies, but may include accounts receivable, inventory, premises and equipment, and real estate. Letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. These letters of credit are issued to support contractual obligations of the Company’s customers. The credit risk involved in issuing letters of credit is essentially the same as the risk involved in extending loans to customers. The approximate remaining term of letters of credit range from 1 month to 11 years at December 31, 2021. The Company also has off-balance sheet commitments for purchases of state tax credits and commitments for various capital raises for SBICs .

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS The fair value of an asset or liability is the exchange price that would be received to sell that asset or paid to transfer that liability in an orderly transaction occurring in the principal market (or most advantageous market in the absence of a principal market) for such asset or liability. Inputs to valuation techniques include the assumptions that market participants would use in pricing an asset or liability. ASC Topic 820, Fair Value Measurements and Disclosures, establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows: • Level 1 Inputs - Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. • Level 2 Inputs - Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These might include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, volatilities, prepayment speeds, credit risks, etc.) or inputs that are derived principally from or corroborated by market data by correlation or other means. • Level 3 Inputs - Unobservable inputs for determining the fair values of assets or liabilities that reflect an entity’s own assumptions about the assumptions that market participants would use in pricing the assets or liabilities. Fair value on a recurring basis The following table summarizes financial instruments measured at fair value on a recurring basis as of December 31, 2021 and 2020, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value. December 31, 2021 ($ in thousands) Quoted Prices in Significant Significant Total Fair Assets Securities available-for-sale Obligations of U.S. Government-sponsored enterprises $ — $ 173,511 $ — $ 173,511 Obligations of states and political subdivisions — 575,084 — 575,084 Residential mortgage-backed securities — 513,859 — 513,859 Corporate debt securities — 12,382 — 12,382 U.S. Treasury Bills — 91,170 — 91,170 Total securities available-for-sale — 1,366,006 — 1,366,006 Other investments — 3,012 — 3,012 Derivative financial instruments — 12,869 — 12,869 Total assets $ — $ 1,381,887 $ — $ 1,381,887 Liabilities Derivative financial instruments $ — $ 15,794 $ — $ 15,794 Total liabilities $ — $ 15,794 $ — $ 15,794 December 31, 2020 ($ in thousands) Quoted Prices in Significant Significant Total Fair Assets Securities available-for-sale Obligations of U.S. Government-sponsored enterprises $ — $ 15,161 $ — $ 15,161 Obligations of states and political subdivisions — 344,232 — 344,232 Residential mortgage-backed securities — 526,572 — 526,572 Corporate debt securities — 14,998 — 14,998 U.S. Treasury Bills — 11,466 — 11,466 Total securities available-for-sale — 912,429 — 912,429 Derivative financial instruments — 28,703 — 28,703 Total assets $ — $ 941,132 $ — $ 941,132 Liabilities Derivative financial instruments $ — $ 34,967 $ — $ 34,967 Total liabilities $ — $ 34,967 $ — $ 34,967 • Securities available-for-sale . Securities classified as available-for-sale are reported at fair value utilizing Level 2 inputs. Fair values for Level 2 securities are based upon dealer quotes, market spreads, the U.S. Treasury yield curve, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and conditions at the security level. Changes in fair value are recognized through accumulated other comprehensive income. • Derivatives . Derivatives are reported at fair value utilizing Level 2 inputs. The Company obtains counterparty quotations to value its interest rate swaps and caps. In addition, the Company validates the counterparty quotations with third-party valuation sources. Derivatives with negative fair values are included in Other liabilities in the consolidated balance sheets. Derivatives with positive fair value are included in Other assets in the consolidated balance sheets. Changes in the fair value of client-related derivative instruments are recognized through net income. For the years ended December 31, 2021 and 2020, the gains and losses substantially offset each other due to the Company’s hedging of the client swaps with other bank counterparties. Fair value on a non-recurring basis Certain financial assets and financial liabilities are measured at fair value on a non-recurring basis; that is, the instruments are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). • Impaired loans . On a quarterly basis, fair value adjustments are recorded as necessary on impaired loans to account for (1) partial write-downs based on the current appraised or market-quoted value of the underlying collateral or (2) the full charge-off of the loan carrying value. In some cases, the properties for which market quotes or appraised values have been obtained are located in areas where comparable sales data is limited, outdated, or unavailable. In addition, the Company may adjust the valuations based on other relevant market conditions or information. Accordingly, fair value estimates, including those obtained from real estate brokers or other third-party consultants, for collateral-dependent impaired loans are classified in Level 3 of the valuation hierarchy. • Other real estate. These assets are reported at the lower of the loan carrying amount at foreclosure or fair value. Fair value is based on third party appraisals of each property and the Company’s judgment of other relevant market conditions. These are considered Level 3 inputs. • Loan servicing asset . The loan servicing asset is included in Other assets on the Company’s consolidated balance sheets and assessed for impairment on a quarterly basis. Market-based cash flow modeling and discounting models specific to the SBA industry are provided by a third-party valuation service and are considered Level 2 inputs. The following table presents financial instruments and non-financial assets measured at fair value on a non-recurring basis as of December 31, 2021 and 2020. December 31, 2021 (1) (1) (1) (1) ($ in thousands) Total Fair Value Quoted Prices in Active Significant Significant Total losses for the year ended Impaired loans $ 6,406 $ — $ — $ 6,406 $ 3,500 Other real estate 632 — — 632 29 Loan servicing asset 3,146 $ 3,146 $ — $ 156 Total $ 10,184 $ — $ 3,146 $ 7,038 $ 3,685 December 31, 2020 (1) (1) (1) (1) ($ in thousands) Total Fair Value Quoted Prices in Active Significant Significant Total losses for the year ended Impaired loans $ 1,247 $ — $ — $ 1,247 $ 4,486 Other real estate 3,600 — — 3,600 1,000 Total $ 4,847 $ — $ — $ 4,847 $ 5,486 (1) The amounts represent balances measured at fair value during the period and still held as of the reporting date. Carrying amount and fair value at December 31, 2021 and 2020 Following is a summary of the carrying amounts and fair values of the Company’s financial instruments on the consolidated balance sheets at December 31, 2021 and 2020. This summary excludes certain financial assets and liabilities for which carrying value approximates fair value and financial instruments that are recorded at fair value on a recurring basis disclosed above. Financial instruments for which carrying values approximate fair value include cash and due from banks, federal funds sold, interest bearing deposits, accrued interest receivable/payable, demand, savings and money market deposits. December 31, 2021 December 31, 2020 ($ in thousands) Carrying Amount Estimated fair value Level Carrying Amount Estimated fair value Level Balance sheet assets Securities held-to-maturity $ 429,681 $ 434,672 Level 2 $ 487,610 $ 501,523 Level 2 Other investments 56,884 56,884 Level 2 48,764 48,764 Level 2 Loans held-for-sale 6,389 6,389 Level 2 13,564 13,564 Level 2 Loans, net 8,872,601 8,869,891 Level 3 7,088,264 7,067,562 Level 3 State tax credits, held-for-sale 27,994 30,686 Level 3 36,853 39,925 Level 3 Servicing asset 6,714 6,714 Level 2 5,721 5,721 Level 2 Balance sheet liabilities Certificates of deposit $ 608,293 $ 606,177 Level 3 $ 550,095 $ 553,946 Level 3 Subordinated debentures and notes 154,899 155,972 Level 2 203,637 192,889 Level 2 FHLB advances 50,000 51,527 Level 2 50,000 51,871 Level 2 Other borrowings 353,863 353,863 Level 2 301,081 301,081 Level 2 Limitations Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These estimates are subjective in nature and involve uncertainties and matters of significant judgment, and therefore, cannot be determined with precision. Such estimates include the valuation of loans, goodwill, intangible assets, and other long-lived assets, along with assumptions used in the calculation of income taxes, among others. These estimates and assumptions are based on management’s best estimates and judgment. Management evaluates its estimates and assumptions on an ongoing basis using experience and other factors, including the current economic environment, which management believes to be reasonable under the circumstances. Such estimates and assumptions are adjusted when facts and circumstances dictate. Changing real estate values, illiquid credit markets, volatile equity markets, and declines in consumer spending have combined to increase the uncertainty inherent in such estimates and assumptions. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. Changes in estimates resulting from continuing changes in the economic environment will be reflected in the financial statements in future periods. In addition, these estimates do not reflect any premium or discount that could result from offering for sale at one time the Company’s entire holdings of a particular financial instrument. Fair value estimates are based on existing on-balance and off-balance-sheet financial instruments without attempting to estimate the value of

Parent Company Only Condensed_2

Parent Company Only Condensed Financial Statements	12 Months Ended
	Dec. 31, 2021
Condensed Financial Information Disclosure [Abstract]
Parent Company Only Condensed Financial Statements	PARENT COMPANY ONLY CONDENSED FINANCIAL STATEMENTS Condensed Balance Sheets December 31, ($ in thousands) 2021 2020 Assets Cash $ 94,760 $ 75,475 Investment in Bank 1,568,796 1,200,689 Investment in nonbank subsidiaries 14,302 9,778 Other assets 33,847 35,108 Total assets $ 1,711,705 $ 1,321,050 Liabilities and Shareholders’ Equity Subordinated debentures and notes $ 154,899 $ 203,637 Notes payable 22,857 30,000 Accounts payable and other liabilities 4,833 8,439 Shareholders' equity 1,529,116 1,078,974 Total liabilities and shareholders' equity $ 1,711,705 $ 1,321,050 Condensed Statements of Operations Year ended December 31, ($ in thousands) 2021 2020 2019 Income: Dividends from Bank $ 95,000 $ 37,000 $ 60,000 Dividends from nonbank subsidiaries 2,000 1,400 1,500 Other 3,600 483 663 Total income 100,600 38,883 62,163 Expenses: Interest expense 11,406 10,590 8,689 Other expenses 11,037 6,946 6,936 Total expenses 22,443 17,536 15,625 Income before taxes and equity in undistributed earnings of subsidiaries 78,157 21,347 46,538 Income tax benefit 3,710 3,448 3,478 Net income before equity in undistributed earnings of subsidiaries 81,867 24,795 50,016 Equity in undistributed earnings of subsidiaries 51,188 49,589 42,723 Net income $ 133,055 $ 74,384 $ 92,739 Condensed Statements of Cash Flows Year ended December 31, ($ in thousands) 2021 2020 2019 Cash flows from operating activities: Net income $ 133,055 $ 74,384 $ 92,739 Adjustments to reconcile net income to net cash provided by (used in) operating activities: Share-based compensation 6,017 4,178 4,032 Net income of subsidiaries (148,188) (87,989) (104,223) Dividends from subsidiaries 97,000 38,400 61,500 Other, net (16) 3,588 (1,063) Net cash provided by operating activities 87,868 32,561 52,985 Cash flows from investing activities: Proceeds (cash paid) for acquisitions, net of cash acquired 2,346 (1,243) (36,015) Purchases of other investments (2,204) (1,166) (2,634) Proceeds from distributions on other investments 2,656 765 1,271 Net cash provided by (used in) investing activities 2,798 (1,644) (37,378) Cash flows from financing activities: Proceeds from issuance of subordinated notes — 61,953 — Payments for the redemption of subordinated notes (50,000) — — Proceeds from notes payable — — 1,000 Repayments of notes payable — — (3,000) Proceeds from issuance of long-term debt — — 40,000 Repayment of long-term debt (7,143) (4,286) (5,714) Cash dividends paid (26,153) (19,795) (16,569) Payments for the repurchase of common stock (60,589) (15,347) (15,526) Proceeds from issuance of preferred stock 71,988 — — Other 516 78 (212) Net cash provided by (used in) financing activities (71,381) 22,603 (21) Net increase in cash and cash equivalents 19,285 53,520 15,586 Cash and cash equivalents, beginning of year 75,475 21,955 6,369 Cash and cash equivalents, end of year $ 94,760 $ 75,475 $ 21,955 Supplemental disclosures of cash flow information: Noncash transactions: Common shares issued in connection with acquisitions $ 343,650 $ 167,035 $ 171,885

Supplemental Financial Informat

Supplemental Financial Information	12 Months Ended
	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Supplemental Financial Information	SUPPLEMENTAL FINANCIAL INFORMATION The following table presents miscellaneous income and other expense components that exceed one percent of the aggregate of total interest income and other income in one or more of the periods indicated: Year ended December 31, ($ in thousands) 2021 2020 2019 Miscellaneous income: Community development fees $ 5,491 $ 3,353 $ 889 Other miscellaneous income 16,657 13,609 11,007 Total miscellaneous income $ 22,148 $ 16,962 $ 11,896 Other expense: Amortization expense $ 5,691 $ 5,673 $ 5,543 Banking expenses 6,123 4,921 5,258 Customer analysis expense 12,104 1,246 — FDIC and other insurance 5,789 3,897 2,380 Loan, legal expenses 7,130 4,003 3,526 Meals and entertainment 1,253 742 3,670 Outside services 4,992 4,961 4,335 Other expenses 19,593 18,807 17,119 Total other noninterest expenses $ 62,675 $ 44,250 $ 41,831

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Business and Consolidation	Enterprise is a financial holding company that provides a full range of banking and wealth management services to individuals and corporate customers primarily located in the Arizona, California, Kansas, Missouri, Nevada, and New Mexico markets through its banking subsidiary, Enterprise Bank & Trust. All intercompany accounts and transactions have been eliminated.The Company and its banking subsidiary are subject to the regulations of certain federal and state agencies and undergo periodic examinations by those regulatory agencies. The Company has one operating segment.
Use of Estimates	The consolidated financial statements of the Company have been prepared in conformity with GAAP. In preparing the consolidated financial statements, management is required to make estimates and assumptions, which significantly affect the reported amounts in the consolidated financial statements. Such estimates include the valuation of loans, goodwill, intangible assets, and other long-lived assets, along with assumptions used in the calculation of income taxes, among others. These estimates and assumptions are based on management’s best estimates and judgment. Management evaluates its estimates and assumptions on an ongoing basis using experience and other factors, including the current economic environment, which management believes to be reasonable under the circumstances. Management adjusts such estimates and assumptions when facts and circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. Changes in those estimates resulting from continuing changes in the economic environment will be reflected in the financial statements in future periods.
Cash Flow Information	For purposes of reporting cash flows, the Company considers cash and due from banks, interest-bearing deposits and federal funds sold that mature within 90 days of the balance sheet date to be cash and cash equivalents. The balances at December 31, 2021 and 2020 were not subject to reserve requirements from the Federal Reserve.
Investments	The Company has classified all investments in debt securities as available-for-sale or held-to-maturity. Securities classified as available-for-sale are carried at fair value. Unrealized holding gains and losses for available-for-sale securities are excluded from earnings and reported as a net amount in a separate component of shareholders’ equity until realized. All previous fair value adjustments included in the separate component of shareholders’ equity are reversed upon sale. Securities classified as held-to-maturity are carried at amortized cost and adjusted for amortization of premiums and accretion of discounts. Prior to the adoption of ASU 2016-13 on January 1, 2020, declines in the fair value of securities below their cost deemed to be other-than-temporary were reflected in operations as realized losses. In estimating other-than-temporary impairment losses, management evaluated investment securities for other-than-temporary declines in fair value on a quarterly basis. This analysis required management to consider various factors, which included (1) the present value of the cash flows expected to be collected compared to the amortized cost of the security, (2) duration and magnitude of the decline in value, (3) the financial condition of the issuer or issuers, (4) structure of the security, and (5) the intent to sell the security or whether it’s more likely than not the Company would be required to sell the security before its anticipated recovery in market value. An ACL on held-to-maturity securities is deducted from the amortized cost basis of the securities to reflect the expected amount to be collected. When it is determined that a security will not be collected, the balance is written-off through the allowance. In evaluating the need for an ACL, securities with similar risk characteristics are grouped and an estimate of expected cash flows is determined using loss experience, adjusted for current and reasonable and supportable forecasts of economic conditions. For available-for-sale securities in a loss position, the Company evaluates whether the decline in fair value below amortized cost resulted from a credit loss or other factors. Losses attributed to credit are recognized through an ACL on available-for-sale securities, limited to the amount that the fair value of securities is less than the amortized cost basis. In assessing credit loss, the Company considers, among other things, (1) the extent to which fair value is less than the amortized cost basis, (2) adverse conditions specific to the security or industry, (3) historical payment patterns, (4) the likelihood of future payments, and (5) changes to the rating of a security by a rating agency. The Company has elected to exclude accrued interest receivable balances from the estimate of the ACL as these amounts are timely written off as a credit loss expense. Adjustments to the ACL on held-to-maturity and available-for-sale securities are recognized as a component of the provision for credit losses in the Consolidated Statements of Operations. Premiums and discounts are amortized or accreted over the expected lives of the respective securities as an adjustment to yield using the interest method. Dividend and interest income is recognized when earned. Realized gains and losses are included in earnings and are derived using the specific identification method for determining the cost of securities sold.
Loans Receivable	The Company provides long-term financing of one-to-four-family residential real estate by originating fixed and variable rate loans. Long-term fixed and variable rate loans are usually sold into the secondary market with limited recourse. Upon receipt of an application for a real estate loan, the Company determines whether the loan will be sold into the secondary market or retained in the Company’s loan portfolio. The interest rates on the loans sold are locked with the buyer and the Company bears no interest rate risk related to these loans. Mortgage loans held-for-sale are carried at the lower of cost or fair value, which is determined on a specific identification method. The Company does not retain servicing on these loans. The Company also originates SBA7(a) loans that generally provide for a guarantee of 75% up to a maximum amount. The guaranteed portion of the loan can be sold in an active secondary market. For the years ended December 31, 2021 and 2020, all SBA7(a) loans are considered held-for-investment; however, as the Company makes the determination to sell the loans, they will be moved into the held-for-sale category. Sales of SBA guaranteed loans are executed on a servicing retained basis, and the Company retains the rights and obligations to service the loans. At December 31, 2021, the Company was servicing SBA loans that had been sold and has recorded a related servicing asset of $6.7 million. The servicing asset is accounted for under the amortization method and is evaluated for impairment. Amortization of the servicing asset is recorded as a reduction to servicing income. Gains on the sale of loans held-for-sale are reported net of direct origination fees and costs in the Company’s Consolidated Statements of Operations. Loans Loans are reported at the principal balance outstanding, net of unearned fees, costs, and premiums or discounts on acquired loans. Loan origination fees, direct origination costs, and premiums or discounts resulting from acquired loans are deferred and recognized over the lives of the related loans as a yield adjustment using the interest method. Interest on loans is accrued to income based on the principal balance outstanding. The recognition of interest income is discontinued when a loan becomes 90 days past due or a significant deterioration in the borrower’s credit has occurred which, in management’s judgment, negatively impacts the collectibility of the loan. Unpaid interest on such loans is reversed at the time the loan becomes uncollectible and subsequent interest payments received are generally applied to principal if any doubt exists as to the collectibility of such principal. Loans that have not been restructured are returned to accrual status when management believes full collectibility of principal and interest is expected. Non-accrual loans that have been restructured will remain in a non-accrual status until the borrower has made at least six months of consecutive contractual payments. The Company has elected to present the accrued interest receivable balance separate from amortized cost basis, to exclude accrued interest receivable balances from the tabular disclosures, and not to estimate an ACL on accrued interest receivable as these amounts are timely written off as a credit loss expense. Accrued interest receivable totaled $31.1 million and $30.6 million at December 31, 2020 and 2021, respectively, and were reported in Other Assets on the consolidated balance sheets. Acquired Loans Prior to the adoption of ASU 2016-13 on January 1, 2020, PCI loans were acquired in a business combination or transaction, had evidence of deterioration of credit quality since origination and for which it was probable, at acquisition, that the Company would be unable to collect all contractually required payments receivable. PCI loans were initially recorded at fair value (as determined by the present value of expected future cash flows) with no valuation allowance. The difference between the undiscounted cash flows expected at acquisition and the investment in the loans, or the “accretable yield,” was recognized as interest income on a level-yield method over the life of the loans. Contractually required payments for interest and principal that exceeded the undiscounted cash flows expected at acquisition, or the “nonaccretable difference,” were not recognized as a yield adjustment or as a loss accrual or a valuation allowance. The Company aggregated individual loans with common risk characteristics into pools of loans. Increases in expected cash flows subsequent to the initial investment were recognized prospectively through adjustment of the yield on the loans over their remaining lives. Decreases in expected cash flows due to an inability to collect contractual cash flows were recognized as impairment through the provision for loan losses account. Any allowance for loan loss on these pools reflected only losses incurred after the acquisition. Disposals of loans, including sales of loans, paydowns, payments in full or foreclosures resulted in the removal or reduction of the loan from the loan pool. Subsequent to the adoption of ASU 2016-13, acquired loans are separated into two categories based on the credit risk characteristics of the underlying borrowers as either PCD, for loans which have experienced more than insignificant credit deterioration since origination, or loans with no credit deterioration (non-PCD). At the date of acquisition, an ACL on PCD loans is determined and added to the amortized cost basis of the individual loans. The difference between the initial amortized cost basis and the par value of the loan is a noncredit discount or premium, which is amortized into interest income over the life of the loan. The ACL on PCD loans is recorded in the acquisition accounting and no provision for credit losses is recognized at the acquisition date. Subsequent changes to the ACL are recorded through provision expense. For non-PCD loans, an ACL is established immediately after the acquisition through a charge to the provision for credit losses. The ACL for both PCD and non-PCD is determined by pooling loans with similar risk characteristics and using the approach discussed below under “Allowance for Credit Losses on Loans”. Impaired Loans Loans are considered “impaired” when it becomes probable that the Company will be unable to collect all amounts due according to the loan’s contractual terms. Non-accrual loans, loans past due greater than 90 days and still accruing, unless adequately secured and in the process of collection, and restructured loans qualify as “impaired loans.” Restructured loans involve the granting of a concession on the terms of a loan to a borrower experiencing financial difficulty. Concessions may be granted in various forms, including changes in payment schedule or interest rate. When measuring impairment, the expected future cash flows of an impaired loan are discounted at the loan’s effective interest rate at origination. Alternatively, impairment can be measured by reference to an observable market price, if one exists, or the fair value of the collateral for a collateral-dependent loan. Loans and leases, which are deemed uncollectible, are charged off to the allowance for credit losses, while recoveries of amounts previously charged off are credited to the allowance for credit losses. Loans are generally placed on non-accrual status when contractually past due 90 days or more as to interest or principal payments. Additionally, whenever management becomes aware of facts or circumstances that may adversely impact the collectability of principal or interest on loans, it is management’s practice to place such loans on non-accrual status immediately, rather than delaying such action until the loans become 90 days past due. Previously accrued and uncollected interest on such loans is reversed. Income is recorded only to the extent a determination has been made that the principal balance of the loan is collectible and the interest payments are subsequently received in cash, or for a restructured loan, the borrower has made six consecutive contractual payments. If collectibility of the principal is in doubt, payments received are applied to loan principal. Loans past due 90 days or more but still accruing interest are also generally included in nonperforming loans. Loans past due 90 days or more but still accruing are classified as such where the underlying loans are both well secured (the collateral value covers principal and accrued interest) and in the process of collection. Allowance for Credit Losses on Loans The ACL on loans is a valuation account that is deducted from the amortized cost basis to present the net amount expected to be collected. Loans are charged-off against the allowance when management believes the uncollectibility of a loan balance is confirmed. Management estimates the allowance using relevant available information, from internal and external sources, relating to past events, current conditions, and reasonable and supportable forecasts. 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, delinquency level, or term as well as for changes in environmental conditions, such as changes in unemployment rates, property values, or other relevant factors. The ACL on loans is measured on a collective basis when similar risk characteristics exist. The Company has identified the following portfolio segments: C&I – C&I loans consist of loans to small and medium-sized businesses in a wide variety of industries. These loans are generally collateralized by inventory, accounts receivable, equipment, real estate and other commercial assets, and may be supported by other credit enhancements such as personal guarantees. Risk arises primarily due to a difference between expected and actual cash flows of the borrower. However, the recoverability of these loans is also dependent on other factors primarily dictated by the type of collateral securing these loans. The fair value of the collateral securing these loans may fluctuate as market conditions change. Included within C&I are revolving loans supported by borrowing bases that fluctuate depending on the amount of underlying collateral. A portion of C&I loans consists of sponsor finance, which are loans with senior debt exposure to private equity backed companies. CRE – CRE loans include various types of loans for which the Company holds real property as collateral. Commercial real estate lending activity is typically restricted to owner-occupied properties or to investor properties that are owned by customers with a current banking relationship. The primary risks of CRE loans include the borrower’s inability to pay, material decreases in the value of the real estate being held as collateral and significant increases in interest rates, which may make the real estate mortgage loan unprofitable. Real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. Construction and Land Development – The Company originates loans to finance construction projects including 1-4 family residences, multifamily residences, commercial office, and industrial projects. Construction loans are generally collateralized by first liens on the real estate and have floating interest rates. Construction loans are considered to have higher risks due to construction completion and timing risk, and the ultimate repayment being sensitive to interest rate changes, governmental regulation of real property and the availability of long-term financing. Additionally, economic conditions may impact the Company’s ability to recover its investment in construction loans. Adverse economic conditions may negatively impact the real estate market which could affect the borrowers’ ability to complete and sell the project. Additionally, the fair value of the underlying collateral may fluctuate as market conditions change. Residential Real Estate – The Company originates loans to finance one- to four-family residences, secured by both first and second liens. Repayment of these loans is dependent on the borrowers’ ability to pay and the fair value of the underlying collateral. Residential loans with a second lien are inherently riskier due to the junior lien position. Agricultural – Agricultural loans are generally secured with equipment, livestock, crops or other non-real property and at times the underlying real property. Agricultural loans are primarily included as a component of CRE and C&I loans. Consumer – The Company provides a broad range of consumer loans to customers, including personal lines of credit, credit cards, recreational vehicles, yachts and automobile loans. Repayment of these loans is dependent on the borrowers’ ability to pay and the fair value of the underlying collateral. Consumer loans are included as a component of Other loans. The Company utilizes a DCF method to measure the ACL on loans collectively evaluated that are sub-segmented by credit risk levels. The DCF method incorporates assumptions for probability of default, loss given default, prepayments and curtailments over the contractual term of the loans. In determining the probability of default, the Company utilized regression analysis to determine certain economic factors that are relevant loss drivers in the portfolio segments based on historical or peer evaluations. National unemployment is a loss driver used in nearly all portfolios, except Consumer and first lien Residential Real Estate. The annual percentage change in gross domestic product is also used in C&I, Construction, Agricultural first lien Residential Real Estate, and Consumer portfolios. The annual percentage change in a commercial real estate index, national house price index and national retail sales are used in the CRE, second lien Residential Real Estate and Consumer portfolios, respectively. The contractual term excludes expected extensions, renewals, and modifications unless either of the following applies: management has a reasonable expectation at the reporting date that a troubled debt restructuring will be executed with an individual borrower, or the extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by the Company. The Company uses a one-year reasonable and supportable forecast that considers baseline, upside and downside economic scenarios. For periods beyond the forecast period, the Company reverts to historical loss rates on a straight-line basis over a one-year period. Loans that do not share risk characteristics are evaluated on an individual basis. Loans evaluated individually are not also included in the collective evaluation. When management determines foreclosure is probable, expected credit losses are based on the fair value of the collateral at the reporting date, adjusted for selling costs as appropriate. Loan Charge-Offs
Other Real Estate	Other real estate represents property acquired through foreclosure or deeded to the Company in lieu of foreclosure on loans on which the borrowers have defaulted on the payment of principal or interest. Other real estate is recorded on an individual asset basis at the lower of cost or fair value less estimated costs to sell. The fair value of other real estate is based upon estimates of future cash flows, market value of similar assets, if available, or independent appraisals. These estimates involve significant uncertainties and judgments. As a result, fair value estimates may not be realizable in a current sale or settlement of the other real estate. Subsequent reductions in fair value are expensed within noninterest expense. Gains and losses resulting from the sale of other real estate are credited or charged to current period earnings. Costs of maintaining and operating other real estate are expensed as incurred, and expenditures to complete or improve other real estate properties are capitalized if the expenditures are expected to be recovered upon ultimate sale of the property.
Fixed Assets	Buildings, leasehold improvements, furniture, fixtures, and equipment are stated at cost less accumulated depreciation. All categories are computed using the straight-line method over their respective estimated useful lives. Furniture, fixtures and equipment is depreciated over three ten
State Tax Credits Held for Sale	The Company has purchased the rights to receive 10-year streams of state tax credits at agreed upon discount rates and sells such tax credits to its clients and others. State tax credits are accounted for at cost. The Company is also a minority partner in a joint venture, accounted for as an equity method investment, that purchases state income tax credits for resale to customers. Income from both the sale of state tax credits and earnings from the joint venture are reported as tax credit income in the Consolidated Statements of Operations.
Cash Surrender Value of Life Insurance	The Company has purchased bank-owned life insurance policies on certain bank officers. Bank-owned life insurance is recorded at its cash surrender value. Changes in the cash surrender values, including death benefits in excess of the carrying amount, are included in noninterest income.
Federal Home Loan Bank Stock	The Bank, as a member of the FHLB, is required to maintain an investment in the capital stock of the FHLB. The stock is redeemable at par by the FHLB, and is, therefore, carried at cost and periodically evaluated for impairment. The Company records FHLB dividends in interest income.
Goodwill and Other Intangible Assets	The Company tests goodwill for impairment on an annual basis and whenever events or changes in circumstances indicate the Company may not be able to recover the respective asset’s carrying amount. The Company’s annual test for impairment was performed in the fourth quarter of December 31, 2021. Such tests involve the use of estimates and assumptions. Potential impairments to goodwill must first be identified by performing a qualitative assessment which evaluates relevant events or circumstances to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If this test indicates it is more likely than not that goodwill has been impaired, then a quantitative impairment test is completed. The quantitative impairment test calculates the fair value of the reporting unit and compares it with its carrying amount, including goodwill. If the carrying amount of goodwill exceeds its implied fair market value, an impairment loss is recognized. That loss is equal to the carrying amount of goodwill that is in excess of its implied fair market value. Core deposit intangibles are amortized using an accelerated method over an estimated useful life of approximately 10 years.
Impairment of Long-Lived Assets	Long-lived assets, such as fixed assets and purchased intangibles subject to amortization, are reviewed for impairment whenever events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds the fair value of the asset. Assets to be disposed of are separately presented in the balance sheet and reported at the lower of the carrying amount or fair value less costs to sell, and are no longer depreciated. The assets and liabilities of a disposal group classified as held-for-sale are presented separately in the appropriate asset and liability sections of the balance sheet.
Derivative Financial Instruments and Hedging Activities	The Company uses derivative financial instruments to assist in managing interest rate sensitivity and to modify the repricing, maturity and option characteristics of certain assets and liabilities. In addition, the Company also offers an interest rate hedge program that includes interest rate swaps to assist its customers in managing their interest rate risk profile. In order to eliminate the interest rate risk associated with offering these products, the Company enters into derivative contracts with third parties to offset the customer contracts. Derivative instruments are required to be measured at fair value and recognized as either assets or liabilities in the consolidated financial statements. Fair value represents the payment the Company would receive or pay if the item were sold or bought in a current transaction. The accounting for changes in fair value (gains or losses) of a hedged item is dependent on whether the related derivative is designated and qualifies for “hedge accounting.” The Company assigns derivatives to one of these categories at the purchase date: cash flow hedge, fair value hedge, or non-designated hedges as part of a customer interest-rate swap product. An assessment of the expected and ongoing hedge effectiveness of any derivative designated a fair value hedge or cash flow hedge is performed as required by the accounting standards. Derivatives are included in other assets and other liabilities in the consolidated balance sheets. The fair value amounts recognized for derivative instruments and the fair value amounts recognized for the right to reclaim or obligation to return cash collateral are not offset when represented under a master netting arrangement. Generally, the only derivative instruments used by the Company have been interest rate swaps, forward currency contracts, and interest rate caps. Certain derivative financial instruments are not designated as cash flow or as fair value hedges for accounting purposes. These non-designated derivatives are intended to provide interest rate protection on net interest income or noninterest income but do not meet hedge accounting treatment. Customer accommodation interest rate swap contracts are not designated as hedging instruments. Changes in the fair value of these instruments are recorded in interest income or noninterest income in the consolidated statements of income depending on the underlying hedged item.
Income Taxes	The Company and its subsidiaries file a consolidated federal income tax return. Deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates in effect for the year in which those temporary differences are expected to be recovered or settled. The need for deferred tax asset valuation allowances is based on a more-likely-than-not standard. The ability to realize deferred tax assets depends on the ability to generate sufficient positive taxable income within the carryback or carryforward periods provided for in the laws for each applicable taxing jurisdiction. The following possible sources of taxable income are considered: future reversal patterns of existing taxable temporary differences, future taxable income exclusive of reversing temporary differences, taxable income in prior carryback years and the availability of qualified tax planning strategies. The assessment regarding whether a valuation allowance is required or should be adjusted depends on all available positive and negative factors including, but not limited to, nature, frequency, and severity of recent losses, duration of available carryforward periods, experience with tax attributes expiring unused and near and medium term financial outlook. Because of the complexity of tax laws and regulations, interpretation can be difficult and subject to legal judgment given specific facts and circumstances. It is possible that others, given the same information, may at any point in time reach different reasonable conclusions regarding the estimated amounts of accrued taxes.
Stock-Based Compensation	Stock-based compensation is recognized as an expense for stock options, restricted stock awards, performance stock units, and restricted stock units granted to employees, directors, and advisors in return for service. Equity classified awards are measured at the grant date fair value using either an observable market value or a valuation methodology, and are recognized over the requisite service period on a straight-line basis. Forfeitures are recorded as they occur. A description of the Company’s stock-based employee compensation plan is included in “Note 16 - Shareholders’ Equity and Compensation Plans.”
Acquisitions and Divestitures	Acquisitions and business combinations are accounted for using the acquisition method of accounting. The assets and liabilities of the acquired entities have been recorded at their estimated fair values at the date of acquisition. Goodwill represents the excess of the purchase price over the fair value of net assets acquired, including the amount assigned to identifiable intangible assets. The purchase price allocation process requires an estimation of the fair values of the assets acquired and the liabilities assumed. When a business combination agreement provides for an adjustment to the cost of the combination contingent on future events, the Company includes an estimate of the acquisition-date fair value as part of the cost of the combination. To determine the fair values, the Company relies on third party valuations, such as appraisals, or internal valuations based on discounted cash flow analyses or other valuation techniques. The results of operations of the acquired business are included in the Company’s consolidated financial statements from the date of acquisition. Merger-related expenses include costs directly related to merger or acquisition activity and include legal and professional fees, system consolidation and conversion costs, and compensation costs such as severance and retention incentives for employees impacted by acquisition activity. The Company accounts for merger-related expenses in the periods in which the costs are incurred and the services are received. For divestitures, the Company measures an asset (disposal group) classified as held-for-sale at the lower of its carrying value at the date the asset is initially classified as held-for-sale or its fair value less costs to sell. The Company reports the results of operations of an entity or group of components that either has been disposed of or held-for-sale as discontinued operations only if the disposal of that component represents a strategic shift that has or will have a major effect on an entity’s operations and financial results. Any incremental direct costs incurred to transact the sale are allocated against the gain or loss on the sale. These costs would include items such as legal fees, title transfer fees, broker fees, etc. Any goodwill and intangible assets associated with the portion of the reporting unit to be disposed of is included in the carrying amount of the business in determining the gain or loss on the sale.
Basic and Diluted Earnings Per Common Share	Basic earnings per common share data is calculated by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period. Common shares outstanding include common stock and restricted stock awards where recipients have satisfied the vesting terms. Diluted earnings per common share gives effect to all dilutive potential common shares outstanding during the period using the treasury stock method.
Consolidated Statement of Comprehensive Income	The Consolidated Statement of Comprehensive Income includes the amount and the related tax impact that have been reclassified from accumulated other comprehensive income to net income. The classification adjustment for unrealized loss/gain on sale of securities included in net income has been recorded through the gain on sale of investment securities line item, within noninterest income, in the Company’s Consolidated Statements of Operations.
Available-for-sale Securities	The unrealized losses at both December 31, 2021, and 2020, were primarily attributable to changes in market interest rates since the securities were purchased. At both December 31, 2021 and 2020, the Company had not recorded an ACL on available-for-sale securities. Accrued interest receivable on held-to-maturity debt securities totaled $3.4 million and $3.6 million at December 31, 2021 and 2020, respectively, and is excluded from the estimate of expected credit losses. The estimate of expected credit losses considers historical credit loss information adjusted for current conditions and reasonable and supportable forecasts. At December 31, 2021 and 2020, the ACL on held-to-maturity securities was $0.6 million and $0.4 million, respectively.
Reclassification, Policy [Policy Text Block]	Certain amounts reported in prior periods have been reclassified to conform to the current presentation. The reclassifications had no effect on net income or shareholders’ equity.

Acquisitions & Divestitures Acq

Acquisitions & Divestitures Acquisitions & Divestitures (Tables)	12 Months Ended
	Dec. 31, 2021
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	The following tables present the assets acquired and liabilities assumed. The consideration exchanged, assets acquired and liabilities assumed of First Choice were recorded at estimated fair value on the date of acquisition. Fair values are considered preliminary until final fair values are determined, or the measurement period has passed, which is no later than one year from the date of acquisition. (in thousands) As Recorded by First Choice Adjustments As Recorded by EFSC Assets acquired: Cash and cash equivalents $ 214,794 $ — $ 214,794 Securities 34,533 (44) (a) 34,489 Loans 1,937,635 5,508 (b) 1,943,143 Allowance (19,626) 12,620 (b) (7,006) Other investments 19,178 138 (c) 19,316 Fixed assets 1,869 (870) (c) 999 Accrued interest receivable 7,131 20 (c) 7,151 Goodwill 73,425 (73,425) (d) — Intangible assets 4,517 375 (e) 4,892 Deferred tax assets 7,558 (1,943) (c) 5,615 Other assets 23,024 1,645 (c) 24,669 Total assets acquired $ 2,304,038 $ (55,976) $ 2,248,062 Liabilities assumed: Deposits $ 1,840,716 $ (287) (c) $ 1,840,429 FHLB advances 160,000 — 160,000 Accrued interest payable 124 — 124 Other liabilities 8,464 (2,160) (c) 6,304 Total liabilities assumed $ 2,009,304 $ (2,447) $ 2,006,857 Net assets acquired $ 294,734 $ (53,529) $ 241,205 Consideration paid: Cash $ 2,152 Common stock 1 343,650 Total consideration paid $ 345,802 Goodwill $ 104,597 1 Common stock consideration was $342,280, net of $1,370 for shares withheld on the settlement of share-based awards of FCBP employees. (a) Fair value adjustments based on the Company’s evaluation of the acquired securities portfolio. (b) Fair value adjustments based on the Company’s evaluation of the acquired loan portfolio, write-off of net deferred loan costs and elimination of the allowance for loan losses recorded by FCBP. (c) Other miscellaneous fair value adjustments. (d) Adjustment to eliminate goodwill.
Business Acquisition, Pro Forma Information [Table Text Block]	Only the acquisition-related expenses that have been incurred as of December 31, 2021 are included in net income in the table below. Twelve months ended December 31, (in thousands, except per share data) 2021 2020 Total revenues (net interest income plus noninterest income) $ 488,280 $ 420,487 Net income 188,416 67,275 Diluted earnings per common share 4.86 1.94

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2021
Earnings Per Share [Abstract]
Summary of Per Common Share Data and Amounts	The following table presents a summary of earnings per common share data and amounts for the periods indicated. Year ended December 31, ($ in thousands, except per share data) 2021 2020 2019 Net income available to common shareholders $ 133,055 $ 74,384 $ 92,739 Weighted average common shares outstanding 34,436 26,954 26,045 Additional dilutive common stock equivalents 60 35 114 Weighted average diluted common shares outstanding 34,496 26,989 26,159 Basic earnings per common share $ 3.86 $ 2.76 $ 3.56 Diluted earnings per common share $ 3.86 $ 2.76 $ 3.55

Investments (Tables)

Investments (Tables)	12 Months Ended
	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Schedule of Available-for-sale and Held-to-Maturity Securities Reconciliation	The following table presents the amortized cost, gross unrealized gains and losses and fair value of securities available-for-sale and held-to-maturity: December 31, 2021 ($ in thousands) Amortized Cost Gross Gross Fair Value Available-for-sale securities: Obligations of U.S. Government-sponsored enterprises $ 175,409 $ 3 $ (1,901) $ 173,511 Obligations of states and political subdivisions 571,587 5,907 (2,410) 575,084 Agency mortgage-backed securities 509,243 8,485 (3,869) 513,859 Corporate debt securities 11,750 632 — 12,382 U.S. Treasury Bills 90,971 220 (21) 91,170 Total securities available-for-sale $ 1,358,960 $ 15,247 $ (8,201) $ 1,366,006 Held-to-maturity securities: Obligations of states and political subdivisions $ 236,379 $ 1,794 $ (730) $ 237,443 Agency mortgage-backed securities 68,105 940 (666) 68,379 Corporate debt securities 125,811 3,039 — 128,850 Total securities held-to-maturity $ 430,295 $ 5,773 $ (1,396) $ 434,672 Allowance for credit losses (614) Total securities held-to-maturity, net $ 429,681 December 31, 2020 ($ in thousands) Amortized Cost Gross Gross Fair Value Available-for-sale securities: Obligations of U.S. Government-sponsored enterprises $ 14,978 $ 186 $ (3) $ 15,161 Obligations of states and political subdivisions 335,271 8,994 (33) 344,232 Agency mortgage-backed securities 506,703 20,190 (321) 526,572 Corporate debt securities 14,750 248 — 14,998 U.S. Treasury Bills 10,980 486 — 11,466 Total securities available-for-sale $ 882,682 $ 30,104 $ (357) $ 912,429 Held-to-maturity securities: Obligations of states and political subdivisions $ 248,324 $ 2,814 $ — $ 251,138 Agency mortgage-backed securities 112,742 2,295 (496) 114,541 Corporate debt securities 126,993 8,851 — 135,844 Total securities held-to-maturity $ 488,059 $ 13,960 $ (496) $ 501,523 Allowance for credit losses (449) Total securities held-to-maturity, net $ 487,610 During 2020, the Company transferred securities with a book value of $331.0 million and fair value of $352.6 million from available-for-sale to held-to-maturity. The Company believes the held-to-maturity category is more consistent with the Company’s intent for these securities. The transfer of securities was made at fair value at the time of transfer. The unamortized portion of the unrealized holding gain at the time of transfer is retained in accumulated other comprehensive income and in the carrying value of held-to-maturity securities. Accordingly, the balance of held-to-maturity securities in the “Amortized cost” column in the table above includes a net unamortized unrealized gain of $21.0 million and $25.6 million at December 31, 2021 and 2020, respectively. Such amounts are amortized over the remaining life of the securities. In January 2022, the Company transferred securities with a book value of $116.7 million from available-for-sale to held-to-maturity. At December 31, 2021, and 2020, there were no holdings of securities of any one issuer in an amount greater than 10% of shareholders’ equity, other than the U.S. Government agencies and sponsored enterprises. The agency mortgage-backed securities are all issued by U.S. Government-sponsored enterprises. Securities having a fair value of $752.7 million and $525.8 million at December 31, 2021, and December 31, 2020, respectively, were pledged as collateral to secure deposits of public institutions and for other purposes as required by law or contract provisions.
Investments Classified by Contractual Maturity Date	The amortized cost and estimated fair value of debt securities at December 31, 2021, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Available-for-sale Held-to-maturity ($ in thousands) Amortized Cost Estimated Amortized Cost Estimated Due in one year or less $ 81,809 $ 81,797 $ 211 $ 214 Due after one year through five years 166,470 165,161 13,793 13,998 Due after five years through ten years 40,130 40,568 143,900 146,933 Due after ten years 561,308 564,621 204,286 205,148 Agency mortgage-backed securities 509,243 513,859 68,105 68,379 $ 1,358,960 $ 1,366,006 $ 430,295 $ 434,672
Schedule of Unrealized Loss on Investments	There were approximately 290 available-for-sale securities and 30 available-for-sale securities in an unrealized loss position as of December 31, 2021 and December 31, 2020, respectively, included in the following tables: December 31, 2021 Less than 12 months 12 months or more Total ($ in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Obligations of U.S. Government-sponsored enterprises $ 163,634 $ 1,775 $ 4,874 $ 126 $ 168,508 $ 1,901 Obligations of states and political subdivisions 242,188 2,361 1,776 49 243,964 2,410 Agency mortgage-backed securities 259,047 3,685 6,467 184 265,514 3,869 U.S. Treasury Bills 60,961 21 — — 60,961 21 $ 725,830 $ 7,842 $ 13,117 $ 359 $ 738,947 $ 8,201 December 31, 2020 Less than 12 months 12 months or more Total ($ in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Obligations of U.S. Government-sponsored enterprises $ 4,997 $ 3 $ — $ — $ 4,997 $ 3 Obligations of states and political subdivisions 4,079 33 — — 4,079 33 Agency mortgage-backed securities 65,986 321 — — 65,986 321 $ 75,062 $ 357 $ — $ — $ 75,062 $ 357
Schedule of Realized Gain (Loss)	The proceeds, gross gains and losses realized from sales of available-for-sale investment securities were as follows: December 31, ($ in thousands) 2021 2020 2019 Gross gains realized $ — $ 421 $ 400 Gross losses realized — — (449) Proceeds from sales 27,135 20,221 357,976
Debt Securities, Available-for-sale	The following table presents the amortized cost, gross unrealized gains and losses and fair value of securities available-for-sale and held-to-maturity: December 31, 2021 ($ in thousands) Amortized Cost Gross Gross Fair Value Available-for-sale securities: Obligations of U.S. Government-sponsored enterprises $ 175,409 $ 3 $ (1,901) $ 173,511 Obligations of states and political subdivisions 571,587 5,907 (2,410) 575,084 Agency mortgage-backed securities 509,243 8,485 (3,869) 513,859 Corporate debt securities 11,750 632 — 12,382 U.S. Treasury Bills 90,971 220 (21) 91,170 Total securities available-for-sale $ 1,358,960 $ 15,247 $ (8,201) $ 1,366,006 Held-to-maturity securities: Obligations of states and political subdivisions $ 236,379 $ 1,794 $ (730) $ 237,443 Agency mortgage-backed securities 68,105 940 (666) 68,379 Corporate debt securities 125,811 3,039 — 128,850 Total securities held-to-maturity $ 430,295 $ 5,773 $ (1,396) $ 434,672 Allowance for credit losses (614) Total securities held-to-maturity, net $ 429,681 December 31, 2020 ($ in thousands) Amortized Cost Gross Gross Fair Value Available-for-sale securities: Obligations of U.S. Government-sponsored enterprises $ 14,978 $ 186 $ (3) $ 15,161 Obligations of states and political subdivisions 335,271 8,994 (33) 344,232 Agency mortgage-backed securities 506,703 20,190 (321) 526,572 Corporate debt securities 14,750 248 — 14,998 U.S. Treasury Bills 10,980 486 — 11,466 Total securities available-for-sale $ 882,682 $ 30,104 $ (357) $ 912,429 Held-to-maturity securities: Obligations of states and political subdivisions $ 248,324 $ 2,814 $ — $ 251,138 Agency mortgage-backed securities 112,742 2,295 (496) 114,541 Corporate debt securities 126,993 8,851 — 135,844 Total securities held-to-maturity $ 488,059 $ 13,960 $ (496) $ 501,523 Allowance for credit losses (449) Total securities held-to-maturity, net $ 487,610 During 2020, the Company transferred securities with a book value of $331.0 million and fair value of $352.6 million from available-for-sale to held-to-maturity. The Company believes the held-to-maturity category is more consistent with the Company’s intent for these securities. The transfer of securities was made at fair value at the time of transfer. The unamortized portion of the unrealized holding gain at the time of transfer is retained in accumulated other comprehensive income and in the carrying value of held-to-maturity securities. Accordingly, the balance of held-to-maturity securities in the “Amortized cost” column in the table above includes a net unamortized unrealized gain of $21.0 million and $25.6 million at December 31, 2021 and 2020, respectively. Such amounts are amortized over the remaining life of the securities. In January 2022, the Company transferred securities with a book value of $116.7 million from available-for-sale to held-to-maturity. At December 31, 2021, and 2020, there were no holdings of securities of any one issuer in an amount greater than 10% of shareholders’ equity, other than the U.S. Government agencies and sponsored enterprises. The agency mortgage-backed securities are all issued by U.S. Government-sponsored enterprises. Securities having a fair value of $752.7 million and $525.8 million at December 31, 2021, and December 31, 2020, respectively, were pledged as collateral to secure deposits of public institutions and for other purposes as required by law or contract provisions.

Portfolio Loans (Tables)

Portfolio Loans (Tables)	12 Months Ended
	Dec. 31, 2021
Non-covered Loans [Line Items]
Schedule of Collateral Dependent Loans	The amortized cost basis of collateral-dependent nonperforming loans by class of loan is presented for the periods indicated: December 31, 2021 Type of Collateral (in thousands) Commercial Real Estate Residential Real Estate Blanket Lien Commercial and industrial $ 4,271 $ 209 $ 9,312 Real estate: Commercial - investor owned 169 1,200 — Commercial - owner occupied 2,807 32 — Residential — 2,048 — Total $ 7,247 $ 3,489 $ 9,312 December 31, 2020 Type of Collateral (in thousands) Commercial Real Estate Residential Real Estate Blanket Lien Other Commercial and industrial $ 8,316 $ — $ 394 $ — Real estate: Commercial - investor owned 9,579 — — — Commercial - owner occupied 2,940 — — — Residential — 4,135 — — Other — — — 17 Total $ 20,835 $ 4,135 $ 394 $ 17
Acquired PCD Loans	The Company has purchased loans, for which there was, at acquisition, evidence of more than insignificant deterioration of credit quality since origination. The carrying amount of those loans is as follows: ($ in thousands) At July 21, 2021 Par value of acquired loans $ 180,440 Allowance for credit losses (7,006) Non-credit discount (6,428) Purchase price of acquired loans $ 167,006
Non-Covered Loans
Non-covered Loans [Line Items]
Summary of Portfolio Loans by Category	Below is a summary of loans by category at December 31, 2021 and 2020: ($ in thousands) December 31, 2021 December 31, 2020 Commercial and industrial $ 3,396,590 $ 3,100,299 Real estate loans: Commercial - investor owned 2,141,143 1,589,419 Commercial - owner occupied 2,035,785 1,498,408 Construction and land development 734,073 546,686 Residential 454,052 319,179 Total real estate loans 5,365,053 3,953,692 Other 265,137 187,083 Loans, before unearned loan fees 9,026,780 7,241,074 Unearned loan fees, net (9,138) (16,139) Loans, including unearned loan fees $ 9,017,642 $ 7,224,935
Summary of Allowance for Loan Losses and the Recorded Investment in Portfolio Loans by Class and Category Based on Impairment Method	A summary of the activity, by loan category, in the allowance for loan losses for 2019, excluding the allowance on PCI loans, and the ACL on loans for 2020 and 2021 is as follows: ($ in thousands) Commercial and industrial CRE - investor owned CRE - owner occupied Construction and land development Residential real estate Other Total Balance at December 31, 2019 Allowance for loan losses: Balance, beginning of year $ 29,039 $ 4,683 $ 4,239 $ 1,987 $ 1,616 $ 731 $ 42,295 Provision for loan losses 4,801 1,708 673 (237) (330) 67 6,682 Charge-offs (6,882) (551) (58) (54) (667) (382) (8,594) Recoveries 338 95 19 776 661 295 2,184 Balance, end of year $ 27,296 $ 5,935 $ 4,873 $ 2,472 $ 1,280 $ 711 $ 42,567 Balance at December 31, 2020 Allowance for loan losses: Balance at December 31, 2019 $ 27,296 $ 5,935 $ 4,873 $ 2,472 $ 1,280 $ 711 $ 42,567 PCI allowance at December 31, 2019 159 — — 139 — 423 721 CECL adoption 6,494 10,726 2,598 5,183 3,470 (84) 28,387 PCD loans immediately charged off — (5) (57) (217) (1,401) — (1,680) Balance, beginning of year $ 33,949 $ 16,656 $ 7,414 $ 7,577 $ 3,349 $ 1,050 $ 69,995 Provision for loan losses 28,373 11,037 7,845 13,438 674 2,012 63,379 Initial allowance on acquired PCD loans 23 2,026 1,427 45 3 — 3,524 Charge-offs (5,381) (498) (30) (31) (408) (391) (6,739) Recoveries 1,848 2,841 356 384 967 116 6,512 Balance, end of year $ 58,812 $ 32,062 $ 17,012 $ 21,413 $ 4,585 $ 2,787 $ 136,671 Balance at December 31, 2021 Allowance for credit losses: Balance, beginning of year $ 58,812 $ 32,062 $ 17,012 $ 21,413 $ 4,585 $ 2,787 $ 136,671 Provision (benefit) for loan losses 14,361 568 (550) (7,365) 3,900 2,079 12,993 Initial allowance on acquired PCD loans 1,077 3,651 1,504 37 — 737 7,006 Charge-offs (12,113) (2,487) (602) (3) (1,521) (459) (17,185) Recoveries 1,688 2,083 196 454 963 172 5,556 Balance, end of year $ 63,825 $ 35,877 $ 17,560 $ 14,536 $ 7,927 $ 5,316 $ 145,041
Schedule of Recorded Investment in Impaired Portfolio Loans by Category	The recorded investment in nonperforming loans by category at December 31, 2021 and 2020 is as follows: December 31, 2021 ($ in thousands) Non-accrual Restructured, accruing Loans over 90 days past due and still accruing interest Total nonperforming loans Nonaccrual loans with no allowance Commercial and industrial $ 17,052 $ 2,783 $ 1,703 $ 21,538 $ 5,685 Real estate: Commercial - investor owned 1,575 — — 1,575 168 Commercial - owner occupied 2,839 — — 2,839 2,550 Residential 1,971 76 1 2,048 1,348 Other 12 — 12 24 — Total $ 23,449 $ 2,859 $ 1,716 $ 28,024 $ 9,751 December 31, 2020 ($ in thousands) Non-accrual Restructured, accruing Loans over 90 days past due and still accruing interest Total nonperforming loans Nonaccrual loans with no allowance Commercial and industrial $ 18,158 $ 3,482 $ 130 $ 21,770 $ 8,316 Real estate: Commercial - investor owned 9,579 — — 9,579 716 Commercial - owner occupied 2,940 — — 2,940 6,024 Residential 4,112 77 — 4,189 — Other 29 — — 29 3,190 Total $ 34,818 $ 3,559 $ 130 $ 38,507 $ 18,246
Summary of Recorded Investment by for Portfolio Loans Restructured	The recorded investment by category for loans restructured during the years ended December 31, 2021 and 2020 is as follows: Year ended December 31, 2021 Year ended December 31, 2020 ($ in thousands, except for number of loans) Number of Loans Pre-Modification Outstanding Post-Modification Outstanding Number of Loans Pre-Modification Outstanding Post-Modification Outstanding Commercial and industrial — $ — $ — 3 $ 7,447 $ 7,447 Real estate: Residential 1 221 221 3 372 372 Total 1 $ 221 $ 221 6 $ 7,819 $ 7,819
Summary of Recorded Investment by Category for Portfolio Loans Restructured and Subsequently Defaulted	Restructured loans primarily resulted from interest rate concessions. As of December 31, 2021, the Company allocated an immaterial amount in specific reserves to loans that have been restructured. Loans restructured that subsequently defaulted during the year ended December 31, 2021 are as follows: Year ended December 31, 2021 ($ in thousands, except for number of loans) Number of Loans Recorded Balance Real Estate: Residential 1 148
Summary of Aging of Recorded Investment in Past Due Portfolio Loans by Portfolio Class and Category	The aging of the recorded investment in past due loans by class and category at December 31, 2021 and 2020 is shown below: December 31, 2021 ($ in thousands) 30-89 Days 90 or More Total Current Total Commercial and industrial $ 24,447 $ 14,158 $ 38,605 $ 3,353,770 $ 3,392,375 Real estate: Commercial - investor owned 3,880 — 3,880 2,137,263 2,141,143 Commercial - owner occupied 10,070 289 10,359 2,025,426 2,035,785 Construction and land development 24 — 24 734,049 734,073 Residential 3,181 1,305 4,486 449,566 454,052 Other 37 11 48 260,166 260,214 Total $ 41,639 $ 15,763 $ 57,402 $ 8,960,240 $ 9,017,642 December 31, 2020 ($ in thousands) 30-89 Days 90 or More Total Current Total Commercial and industrial $ 8,652 $ 12,928 $ 21,580 $ 3,067,415 $ 3,088,995 Real estate: Commercial - investor owned 734 9,301 10,035 1,579,384 1,589,419 Commercial - owner occupied 328 4,647 4,975 1,493,433 1,498,408 Construction and land development 13 — 13 546,673 546,686 Residential 2,071 2,118 4,189 314,990 319,179 Other 1,731 50 1,781 180,467 182,248 Total $ 13,529 $ 29,044 $ 42,573 $ 7,182,362 $ 7,224,935
Summary of Recorded Investment by Risk Category of Portfolio Loans by Portfolio Class and Category	The recorded investment by risk category of the loans by class and year of origination is presented in the following tables as of the dates indicated: December 31, 2021 Term Loans by Origination Year (in thousands) 2021 2020 2019 2018 2017 Prior Revolving Loans Converted to Term Loans Revolving Loans Total Commercial and industrial Pass (1-6) $ 1,180,601 $ 477,374 $ 317,869 $ 132,851 $ 116,738 $ 82,846 $ 11,648 $ 854,102 $ 3,174,029 Watch (7) 35,005 17,502 9,404 9,880 12,217 10,979 4,037 53,595 152,619 Classified (8-9) 14,917 3,530 3,840 1,689 2,988 813 787 10,996 39,560 Total Commercial and industrial $ 1,230,523 $ 498,406 $ 331,113 $ 144,420 $ 131,943 $ 94,638 $ 16,472 $ 918,693 $ 3,366,208 Commercial real estate-investor owned Pass (1-6) $ 651,740 $ 476,946 $ 346,245 $ 146,107 $ 112,043 $ 217,808 $ 3,625 $ 68,236 $ 2,022,750 Watch (7) 16,871 35,908 32,755 1,003 502 17,478 300 2,062 106,879 Classified (8-9) 1,376 3,135 835 817 1,159 4,141 — 50 11,513 Total Commercial real estate-investor owned $ 669,987 $ 515,989 $ 379,835 $ 147,927 $ 113,704 $ 239,427 $ 3,925 $ 70,348 $ 2,141,142 Commercial real estate-owner occupied Pass (1-6) $ 604,975 $ 423,263 $ 278,830 $ 164,210 $ 140,515 $ 235,973 $ 250 $ 48,349 $ 1,896,365 Watch (7) 12,825 13,585 4,301 16,774 10,274 15,764 — 300 73,823 Classified (8-9) 2,048 556 9,181 17,016 6,432 6,959 — — 42,192 Total Commercial real estate-owner occupied $ 619,848 $ 437,404 $ 292,312 $ 198,000 $ 157,221 $ 258,696 $ 250 $ 48,649 $ 2,012,380 Construction real estate Pass (1-6) $ 310,140 $ 229,396 $ 70,531 $ 35,936 $ 14,860 $ 7,180 $ 568 $ 2,992 $ 671,603 Watch (7) 28,947 15,348 60 1,199 11,068 2,330 — — 58,952 Classified (8-9) — — 387 419 — 22 — — 828 Total Construction real estate $ 339,087 $ 244,744 $ 70,978 $ 37,554 $ 25,928 $ 9,532 $ 568 $ 2,992 $ 731,383 Residential real estate Pass (1-6) $ 116,352 $ 66,481 $ 21,356 $ 14,841 $ 24,778 $ 103,840 $ 9,980 $ 87,146 $ 444,774 Watch (7) 2,425 2 622 1,157 248 1,305 — 79 5,838 Classified (8-9) 414 169 554 — 12 2,024 — — 3,173 Total residential real estate $ 119,191 $ 66,652 $ 22,532 $ 15,998 $ 25,038 $ 107,169 $ 9,980 $ 87,225 $ 453,785 Other Pass (1-6) $ 108,209 $ 68,806 $ 22,684 $ 23,145 $ 6,924 $ 13,832 $ 1,500 $ 9,166 $ 254,266 Watch (7) — — — 4 — 2,440 — 1 2,445 Classified (8-9) — — 10 10 — 16 — 2 38 Total Other $ 108,209 $ 68,806 $ 22,694 $ 23,159 $ 6,924 $ 16,288 $ 1,500 $ 9,169 $ 256,749 Total loans classified by risk category $ 3,086,845 $ 1,832,001 $ 1,119,464 $ 567,058 $ 460,758 $ 725,750 $ 32,695 $ 1,137,076 $ 8,961,647 Total loans classified by performing status 55,995 Total loans $ 9,017,642 December 31, 2020 Term Loans by Origination Year (in thousands) 2020 2019 2018 2017 2016 Prior Revolving Loans Converted to Term Loans Revolving Loans Total Commercial and industrial Pass (1-6) $ 1,402,276 $ 454,729 $ 262,258 $ 132,832 $ 25,057 $ 58,315 $ 14,118 $ 527,170 $ 2,876,755 Watch (7) 44,922 15,369 9,585 7,509 19,613 110 — 60,448 157,556 Classified (8-9) 6,602 9,219 3,115 3,964 4,490 1,080 1,281 22,432 52,183 Total Commercial and industrial $ 1,453,800 $ 479,317 $ 274,958 $ 144,305 $ 49,160 $ 59,505 $ 15,399 $ 610,050 $ 3,086,494 Commercial real estate-investor owned Pass (1-6) $ 481,867 $ 338,843 $ 189,305 $ 131,718 $ 138,288 $ 161,439 $ 6,509 $ 32,058 $ 1,480,027 Watch (7) 32,308 19,722 6,656 — 9,647 17,370 — — 85,703 Classified (8-9) — 5,278 8,716 5,830 1,245 2,620 — — 23,689 Total Commercial real estate-investor owned $ 514,175 $ 363,843 $ 204,677 $ 137,548 $ 149,180 $ 181,429 $ 6,509 $ 32,058 $ 1,589,419 Commercial real estate-owner occupied Pass (1-6) $ 419,142 $ 287,001 $ 215,181 $ 179,382 $ 104,470 $ 167,456 $ 2,672 $ 45,323 $ 1,420,627 Watch (7) 13,657 5,257 3,113 6,198 4,338 8,460 1,776 941 43,740 Classified (8-9) 2,420 7,427 5,822 6,140 1,309 10,860 — 63 34,041 Total Commercial real estate-owner occupied $ 435,219 $ 299,685 $ 224,116 $ 191,720 $ 110,117 $ 186,776 $ 4,448 $ 46,327 $ 1,498,408 Construction real estate Pass (1-6) $ 223,069 $ 156,360 $ 45,460 $ 18,579 $ 11,539 $ 9,144 $ — $ 28,880 $ 493,031 Watch (7) 2,544 86 34,179 11,632 — 2,499 — — 50,940 Classified (8-9) 56 2,124 503 1 — 31 — — 2,715 Total Construction real estate $ 225,669 $ 158,570 $ 80,142 $ 30,212 $ 11,539 $ 11,674 $ — $ 28,880 $ 546,686 Residential real estate Pass (1-6) $ 57,059 $ 27,907 $ 17,718 $ 17,138 $ 27,443 $ 92,657 $ 1,172 $ 66,902 $ 307,996 Watch (7) 210 840 526 — 514 1,603 287 511 4,491 Classified (8-9) 571 733 121 14 898 3,181 — 253 5,771 Total residential real estate $ 57,840 $ 29,480 $ 18,365 $ 17,152 $ 28,855 $ 97,441 $ 1,459 $ 67,666 $ 318,258 Other Pass (1-6) $ 43,526 $ 28,195 $ 30,074 $ 9,646 $ 5,641 $ 17,027 $ — $ 40,779 $ 174,888 Watch (7) — 1 8 — — 2,637 — 1 2,647 Classified (8-9) — 18 19 13 — 17 8 4 79 Total Other $ 43,526 $ 28,214 $ 30,101 $ 9,659 $ 5,641 $ 19,681 $ 8 $ 40,784 $ 177,614 Total loans classified by risk category $ 2,730,229 $ 1,359,109 $ 832,359 $ 530,596 $ 354,492 $ 556,506 $ 27,823 $ 825,765 $ 7,216,879 Total loans classified by performing status 8,056 Total loans $ 7,224,935 In the tables above, loan originations in 2021 and 2020 with a classification of watch or classified primarily represent renewals or modifications initially underwritten and originated in prior years. For certain loans, primarily credit cards, the Company evaluates credit quality based on the aging status. The following tables present the recorded investment on loans based on aging status: December 31, 2021 (in thousands) Performing Non Performing Total Commercial and industrial $ 26,166 $ 1 $ 26,167 Real estate: Commercial - investor owned 1 — 1 Commercial - owner occupied 23,405 — 23,405 Construction and land development 2,690 — 2,690 Residential 267 — 267 Other 3,453 12 3,465 Total $ 55,982 $ 13 $ 55,995 December 31, 2020 (in thousands) Performing Non Performing Total Commercial and industrial $ 2,502 $ — $ 2,502 Real estate: Residential 921 — 921 Other 4,612 21 4,633 Total $ 8,035 $ 21 $ 8,056

Leases Lease Cost (Tables)

Leases Lease Cost (Tables)	12 Months Ended
	Dec. 31, 2021
Lease, Cost [Abstract]
Assets And Liabilities, Lessee [Table Text Block]	Supplemental balance sheet information related to leases is as follows: ($ in thousands) December 31, 2021 December 31, 2020 Operating lease right-of-use assets, included in other assets $ 13,483 $ 13,636 Operating lease liabilities, included in other liabilities 14,865 14,152 Operating leases Weighted average remaining lease term 4 years 5 years Weighted average discount rate 2.0 % 2.5 %
Lease, Cost [Table Text Block]	For the twelve months ended ($ in thousands) December 31, 2021 December 31, 2020 Operating lease cost $ 4,877 $ 3,207 Short-term lease cost 833 201 Total lease cost $ 5,710 $ 3,408
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	Maturities of operating lease liabilities are as follows: ($ in thousands) Year Amount 2022 $ 5,191 2023 3,688 2024 2,670 2025 1,326 2026 1,138 Thereafter 1,566 Total operating lease liabilities, payments 15,579 Less: present value adjustment 714 Operating lease liabilities $ 14,865

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2021
Derivative [Line Items]
Schedule of Derivative Instruments	Select terms of the hedges are as follows: $ in thousands Notional Fixed Rate Maturity Date $15,465 2.60% March 15, 2024 $14,433 2.60% March 30, 2024 $18,558 2.64% March 15, 2026 $13,506 2.64% March 17, 2026
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]	The table below presents the fair value of the Company’s derivative financial instruments as well as their classification on the Balance Sheet as of December 31, 2021 and December 31, 2020. Notional Amount Derivative Assets Derivative Liabilities ($ in thousands) December 31, 2021 December 31, 2020 December 31, 2021 December 31, 2020 December 31, 2021 December 31, 2020 Derivatives designated as hedging instruments Interest rate swaps $ 61,962 $ 61,962 $ — $ — $ 2,911 $ 5,987 Derivatives not designated as hedging instruments Interest rate swaps $ 918,698 $ 1,026,016 $ 12,869 $ 28,703 $ 12,883 $ 28,980 The tables below present a gross presentation, the effects of offsetting, and a net presentation of the Company’s financial instruments subject to offsetting as of December 31, 2021 and December 31, 2020. The gross amounts of assets or liabilities can be reconciled to the tabular disclosure of fair value. The tabular disclosure of fair value provides the location that financial assets and liabilities are presented on the Balance Sheet. As of December 31, 2021 Gross Amounts Not Offset in the Statement of Financial Position ($ in thousands) Gross Amounts Recognized Gross Amounts Offset in the Statement of Financial Position Net Amounts of Assets presented in the Statement of Financial Position Financial Instruments Fair Value Collateral Posted Net Amount Assets: Interest rate swaps $ 12,869 $ — $ 12,869 $ 1,033 $ — $ 11,836 Liabilities: Interest rate swaps $ 15,794 $ — $ 15,794 $ 1,033 $ 14,031 $ 730 Securities sold under agreements to repurchase 331,006 — 331,006 — 331,006 — As of December 31, 2020 Gross Amounts Not Offset in the Statement of Financial Position ($ in thousands) Gross Amounts Recognized Gross Amounts Offset in the Statement of Financial Position Net Amounts of Assets presented in the Statement of Financial Position Financial Instruments Fair Value Collateral Posted Net Amount Assets: Interest rate swaps $ 28,703 $ — $ 28,703 $ 2 $ — $ 28,701 Liabilities: Interest rate swaps $ 34,967 $ — $ 34,967 $ 2 $ 34,903 $ 62 Securities sold under agreements to repurchase 271,081 — 271,081 — 271,081 —

Fixed Assets (Tables)

Fixed Assets (Tables)	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Summary of Fixed Assets	A summary of fixed assets at December 31, 2021 and 2020, is as follows: December 31, ($ in thousands) 2021 2020 Land $ 12,849 $ 13,389 Buildings and leasehold improvements 52,012 53,007 Furniture, fixtures and equipment 18,821 17,933 83,682 84,329 Less accumulated depreciation and amortization 35,767 31,160 Total fixed assets $ 47,915 $ 53,169

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Intangible Assets	The table below presents a summary of intangible assets: ($ in thousands) Years ended December 31, 2021 2020 Core deposit intangible, net, beginning of year $ 23,084 $ 26,076 Additions from acquisition 4,892 2,681 Amortization (5,690) (5,673) Core deposit intangible, net, end of year $ 22,286 $ 23,084
Expected Amortization Schedule for the Core Deposit Intangible	The following table reflects the amortization schedule for the core deposit intangible at December 31, 2021. Year Core Deposit Intangible ($ in thousands) 2022 $ 5,367 2023 4,601 2024 3,834 2025 3,068 2026 2,301 After 2026 3,115 $ 22,286
Schedule of Goodwill	The table below presents a summary of goodwill: ($ in thousands) Years ended December 31, 2021 2020 Goodwill, beginning of year $ 260,567 $ 210,344 Additions from acquisition 104,597 50,223 Goodwill, end of year $ 365,164 $ 260,567

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2021
Maturities of Time Deposits [Abstract]
Summary of Certificates of Deposit Maturities	Following is a summary of certificates of deposit maturities at December 31, 2021: ($ in thousands) Brokered Customer Total Less than 1 year $ 10,062 $ 365,902 $ 375,964 Greater than 1 year and less than 2 years 61,173 67,859 129,032 Greater than 2 years and less than 3 years 37,847 21,010 58,857 Greater than 3 years and less than 4 years 19,888 14,238 34,126 Greater than 4 years and less than 5 years — 5,564 5,564 Greater than 5 years — 4,750 4,750 $ 128,970 $ 479,323 $ 608,293

Subordinated Debentures (Tables

Subordinated Debentures (Tables)	12 Months Ended
	Dec. 31, 2021
Subordinated Borrowings [Abstract]
Schedule of Subordinated Debentures	The amounts and terms of each issuance of the Company’s subordinated debentures at December 31, 2021 and 2020 were as follows: Amount Maturity Date Initial Call Date (1) Interest Rate ($ in thousands) 2021 2020 EFSC Clayco Statutory Trust I $ 3,196 $ 3,196 December 17, 2033 December 17, 2008 Floats 3MO LIBOR + 2.85% EFSC Capital Trust II 5,155 5,155 June 17, 2034 June 17, 2009 Floats 3MO LIBOR + 2.65% EFSC Statutory Trust III 11,341 11,341 December 15, 2034 December 15, 2009 Floats 3MO LIBOR + 1.97% EFSC Clayco Statutory Trust II 4,124 4,124 September 15, 2035 September 15, 2010 Floats 3MO LIBOR + 1.83% EFSC Statutory Trust IV 10,310 10,310 December 15, 2035 December 15, 2010 Floats 3MO LIBOR + 1.44% EFSC Statutory Trust V 4,124 4,124 September 15, 2036 September 15, 2011 Floats 3MO LIBOR + 1.60% EFSC Capital Trust VI 14,433 14,433 March 30, 2037 March 30, 2012 Floats 3MO LIBOR + 1.60% EFSC Capital Trust VII 4,124 4,124 December 15, 2037 December 15, 2012 Floats 3MO LIBOR + 2.25% JEFFCO Stat Trust I (2) 7,732 7,752 February 22, 2031 February 22, 2011 Fixed 10.20% JEFFCO Stat Trust II (2) 4,496 4,443 March 17, 2034 March 17, 2009 Floats 3MO LIBOR + 2.75% Trinity Capital Trust III (2) 5,339 5,272 September 8, 2034 September 8, 2009 Floats 3MO LIBOR + 2.70% Trinity Capital Trust IV 10,310 10,310 November 23, 2035 August 23, 2010 Fixed 6.88% Trinity Capital Trust V (2) 7,869 7,706 December 15, 2036 September 15, 2011 Floats 3MO LIBOR + 1.65% Total junior subordinated debentures 92,553 92,290 5.75% Fixed-to-floating rate subordinated notes 63,250 63,250 June 1, 2030 June 1, 2025 Fixed 5.75% until 4.75% Fixed-to-floating rate subordinated notes — 50,000 November 1, 2026 November 1, 2021 Fixed 4.75% until Debt issuance costs (904) (1,903) Total fixed-to-floating rate subordinated notes 62,346 111,347 Total subordinated debentures and notes $ 154,899 $ 203,637 (1) Callable each quarter after initial call date. (2) Purchase accounting adjustments are reflected in the balance and also impact the effective interest rate.

Federal Home Loan Bank Advanc_2

Federal Home Loan Bank Advances (Tables)	12 Months Ended
	Dec. 31, 2021
Federal Home Loan Bank, Advances [Abstract]
Federal Home Loan Bank, Advances [Table Text Block]	The following table summarizes the type, maturity, and rate of the Company’s FHLB advances at December 31: 2021 2020 ($ in thousands) Term Outstanding Balance Weighted Rate Outstanding Balance Weighted Rate Non-amortizing fixed advance Greater than 1 year $ 50,000 1.56 % $ 50,000 1.56 %

Other Borrowings and Notes Pa_2

Other Borrowings and Notes Payable (Tables)	12 Months Ended
	Dec. 31, 2021
Debt Instrument [Line Items]
Schedule of Long-term Debt Instruments [Table Text Block]	Term Loan In February 2019, the Company entered into a five year, $40.0 million unsecured term loan agreement (the “Term Loan”) with another bank with the proceeds primarily used to fund the company’s cash portion of an acquisition in 2019. The interest rate is one-month LIBOR plus 125 basis points. In February 2022, the interest rate on the Term Loan was amended to one-month Term SOFR plus 136 basis points. A summary of the Term Loan is as follows: December 31, ($ in thousands) 2021 2020 Term Loan $ 22,857 $ 30,000 Average balance during the year 26,427 32,123 Maximum balance outstanding at any month-end 28,571 34,286 Weighted average interest rate during the year 1.40 % 1.96 % Average interest rate at December 31 1.38 % 1.44 %
Schedule of Line of Credit Facilities [Table Text Block]	Revolving Credit Line In February 2016, the Company entered into a senior unsecured revolving credit agreement (the “Revolving Agreement”) with another bank. The Revolving Agreement has a one-year term, maturing on February 22, 2022. It allows for borrowings up to $25 million. The interest rate is the one-month LIBOR plus 125 basis points. The proceeds can be used for general corporate purposes. The Revolving Agreement is subject to ongoing compliance with a number of customary affirmative and negative covenants as well as specified financial covenants. In February 2022, the Revolving Agreement was renewed for a one-year term and the interest rate was amended to one-month Term SOFR plus 136 basis points. The revolving credit line was not accessed in 2021 or 2020.
Other Borrowings
Debt Instrument [Line Items]
Summary of Other Borrowings	A summary of securities sold under agreements to repurchase is as follows: December 31, ($ in thousands) 2021 2020 Securities sold under agreement to repurchase $ 331,006 $ 271,081 Average balance during the year 225,895 206,338 Maximum balance outstanding at any month-end 331,006 271,081 Average interest rate during the year 0.10 % 0.23 % Average interest rate at December 31 0.06 % 0.07 %

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2021
Regulated Operations [Abstract]
Schedule of Actual Capital Amounts and Ratios	The capital ratios are presented in the following table: December 31, 2021 December 31, 2020 EFSC Bank EFSC Bank To Be Well-Capitalized Minimum Ratio Common Equity Tier 1 Capital to Risk Weighted Assets 11.3 % 12.5 % 10.9 % 12.5 % 6.5 % 7.0 % Tier 1 Capital to Risk Weighted Assets 13.0 % 12.5 % 12.1 % 12.5 % 8.0 % 8.5 % Total Capital to Risk Weighted Assets 14.7 % 13.5 % 14.9 % 13.7 % 10.0 % 10.5 % Leverage Ratio (Tier 1 Capital to Average Assets) 9.7 % 9.3 % 10.0 % 10.3 % 5.0 % 4.0 %

Compensation Plans (Tables)

Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Cost by Plan [Table Text Block]	The following table summarizes share-based compensation expense: ($ in thousands) 2021 2020 2019 Performance stock units $ 1,777 $ 1,097 $ 1,699 Restricted stock units 3,109 2,613 1,969 Stock options 396 — — Employee stock purchase plan 735 468 364 Total share-based compensation expense $ 6,017 $ 4,178 $ 4,032
Outstanding Long Term Incentive Awards [Table Text Block]	Information related to the outstanding grants at December 31, 2021 is shown below: ($ in thousands) 2019 - 2021 Cycle 2020 - 2022 Cycle 2021 - 2023 Cycle Shares issuable at target 19,576 24,674 40,372 Maximum shares issuable 39,152 49,348 80,744 Unrecognized compensation cost $ 27 $ 538 $ 1,981 Weighted average grant date fair value $ 47.46 $ 38.09 $ 47.16
Schedule of Various Information	At December 31, 2021 and 2020, the Company has reserved the following shares of its authorized but unissued common stock for possible future issuance in connection with the following: December 31, 2021 December 31, 2020 Outstanding performance units (maximum issuance) 169,244 125,176 Outstanding RSU’s 181,657 157,428 Outstanding options and appreciation rights 112,927 — 2018 Stock Incentive Plan 670,326 339,691 Non-Management Director Plan 73,618 86,616 2018 Employee Stock Purchase Plan 571,064 635,890 Total 1,778,836 1,344,801
Summary of Employee Stock Option and SSARs Activity	Following is a summary of stock option activity for 2021. ($ in thousands, except per share data) Shares Weighted Weighted Outstanding at December 31, 2020 — $ — Granted 118,604 43.80 9.2 years Forfeited (5,677) 43.81 Outstanding at December 31, 2021 112,927 $ 43.80 9.2 years Exercisable at December 31, 2021 460 $ 43.81 9.2 years
Summary of Restricted Stock Units Activity	A summary of the status of the Company’s RSU awards as of December 31, 2021 and changes during the year then ended is presented below. Shares Weighted Average Outstanding at December 31, 2020 157,428 $ 42.44 Granted 100,220 44.01 Vested (65,755) 43.91 Forfeited (10,236) 43.51 Outstanding at December 31, 2021 181,657 $ 42.71
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The following table presents the changes in accumulated other comprehensive income (loss) after-tax by component: ($ in thousands) Net Unrealized Gain (Loss) on Available-for-Sale Debt Securities Unamortized Gain (Loss) on Held-to-Maturity Securities Net Unrealized Loss on Cash Flow Hedges Total Balance, December 31, 2018 $ (9,047) $ (235) $ — $ (9,282) Net change 29,226 (33) (2,162) 27,031 Transfer from available-for-sale to held-to-maturity (5,202) 5,202 — — Balance, December 31, 2019 $ 14,977 $ 4,934 $ (2,162) $ 17,749 Net change 23,627 (1,910) (2,346) 19,371 Transfer from available-for-sale to held-to-maturity (16,284) 16,284 — — Balance, December 31, 2020 $ 22,320 $ 19,308 $ (4,508) $ 37,120 Net change (17,049) (3,624) 2,330 (18,343) Balance, December 31, 2021 $ 5,271 $ 15,684 $ (2,178) $ 18,777
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)	The following table presents the pre-tax and after-tax changes in the components of other comprehensive income: 2021 2020 2019 ($ in thousands) Pre-tax Tax effect After-tax Pre-tax Tax effect After-tax Pre-tax Tax effect After-tax Change in unrealized gain (loss) on available-for-sale debt securities $ (22,701) $ (5,652) $ (17,049) $ 31,798 $ 7,854 $ 23,944 $ 38,764 $ 9,575 $ 29,189 Reclassification adjustment for realized (gain) loss on sale of available-for-sale debt securities(a) — — — (421) (104) (317) 49 12 37 Reclassification of gain on held-to-maturity securities(b) (4,672) (1,048) (3,624) (2,537) (627) (1,910) (44) (11) (33) Change in unrealized gain (loss) on cash flow hedges arising during the period(b) 1,533 372 1,161 (7,898) (1,951) (5,947) (3,004) (742) (2,262) Reclassification of loss on cash flow hedges(b) 1,543 374 1,169 4,782 1,181 3,601 133 33 100 Total other comprehensive income (loss) $ (24,297) $ (5,954) $ (18,343) $ 25,724 $ 6,353 $ 19,371 $ 35,898 $ 8,867 $ 27,031 (a) The pre-tax amount is reported in noninterest income/expense in the Consolidated Statements of Operations. (b) The pre-tax amount is reported in interest income/expense in the Consolidated Statements of Operations, except for a $3.2 million termination fee in 2020 recognized in noninterest expense.
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The following weighted average assumptions were used for grants issued during the year ended December 31, 2021. Weighted Average Risk Free Interest Rate 1.06% Expected Dividend Yield 1.65% Expected Volatility 33.92% Expected Term (years) 6.2
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Various Information	Various information related to the RSUs is shown below. ($ in thousands) 2021 2020 2019 Total fair value at vesting date $ 2,855 $ 1,702 $ 1,067 Unrecognized compensation cost 4,622 3,899 3,417 Expected years to recognize unearned compensation 1.9 years 1.9 years 1.9 years Weighted average grant date fair value $ 44.01 $ 39.63 $ 45.00
Stock Plan for Non-Management Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Various Information	Various information related to the Director Plan is shown below. 2021 2020 2019 Shares granted 12,998 15,901 11,382 Weighted average grant date fair value $ 46.05 $ 30.28 $ 41.63

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	The components of income tax expense (benefit) for the years ended December 31, are as follows: Year ended December 31, ($ in thousands) 2021 2020 2019 Current: Federal $ 29,835 $ 25,132 $ 15,470 State and local 5,198 5,009 2,027 Total current 35,033 30,141 17,497 Deferred: Federal 870 (10,651) 4,262 State and local (325) (1,927) 1,538 Total deferred 545 (12,578) 5,800 Total income tax expense $ 35,578 $ 17,563 $ 23,297
Schedule of Income Tax Rate Reconciliation	A reconciliation of expected income tax expense, computed by applying the statutory federal income tax rate in 2021, 2020, and 2019 to income before income taxes and the amounts reflected in the consolidated statements of operations is as follows: Year ended December 31, ($ in thousands) 2021 2020 2019 Income tax expense at statutory rate $ 35,413 $ 19,309 $ 24,368 Increase (reduction) in income tax resulting from: Tax-exempt interest income, net (3,198) (2,010) (962) State and local income taxes, net 4,936 3,254 2,816 Bank-owned life insurance, net (713) (778) (628) Non-deductible expenses 1,090 637 749 Tax benefit of low-income housing tax credit ("LIHTC") investments, net (132) (444) (278) Excess tax benefits 146 (175) (526) Federal tax credits (1,136) (1,327) (913) Non-taxable donation to charitable foundation (263) — (420) Other, net (565) (903) (909) Total income tax expense $ 35,578 $ 17,563 $ 23,297
Schedule of Deferred Tax Assets and Deferred Tax Liabilities	The tax effect of temporary differences that gave rise to significant portions of the deferred tax assets and deferred tax liabilities is as follows: Year ended December 31, ($ in thousands) 2021 2020 Deferred tax assets: Allowance for loan losses $ 36,550 $ 34,031 Loans held-for-sale 6,971 8,058 Other real estate 305 896 Deferred compensation 2,704 2,585 Accrued compensation 5,881 5,391 Net operating losses and tax credits 6,061 6,460 Other deferred tax assets 5,671 3,086 Total deferred tax assets 64,143 60,507 Deferred tax liabilities: Acquired loans 1,709 3,413 Unrealized gains on securities 6,171 12,189 Intangible assets 8,789 7,800 Other deferred tax liabilities 3,754 4,369 Total deferred tax liabilities 20,423 27,771 Net deferred tax asset before valuation allowance 43,720 32,736 Less: valuation allowance 2,830 2,932 Net deferred tax asset $ 40,890 $ 29,804
Schedule of Unrecognized Tax Benefits	The activity in the gross liability for unrecognized tax benefits was as follows: ($ in thousands) 2021 2020 2019 Balance at beginning of year $ 3,157 $ 1,497 $ 1,301 Additions based on tax positions related to the current year 563 395 401 Additions for tax positions of prior years 436 1,556 62 Settlements for tax positions of prior years (1,289) — — Settlements or lapse of statute of limitations (170) (291) (267) Balance at end of year $ 2,697 $ 3,157 $ 1,497

Commitments (Tables)

Commitments (Tables)	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Schedule of Commitments	The contractual amounts of off-balance-sheet financial instruments as of December 31, 2021, and December 31, 2020, are as follows: (in thousands) December 31, 2021 December 31, 2020 Commitments to extend credit $ 2,481,173 $ 1,946,068 Letters of credit 77,314 50,971 State tax credits 18,118 24,473 Limited partnership commitments 21,553 23,400

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Summary of Financial Instruments Measured at Fair Value on a Recurring Basis	The following table summarizes financial instruments measured at fair value on a recurring basis as of December 31, 2021 and 2020, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value. December 31, 2021 ($ in thousands) Quoted Prices in Significant Significant Total Fair Assets Securities available-for-sale Obligations of U.S. Government-sponsored enterprises $ — $ 173,511 $ — $ 173,511 Obligations of states and political subdivisions — 575,084 — 575,084 Residential mortgage-backed securities — 513,859 — 513,859 Corporate debt securities — 12,382 — 12,382 U.S. Treasury Bills — 91,170 — 91,170 Total securities available-for-sale — 1,366,006 — 1,366,006 Other investments — 3,012 — 3,012 Derivative financial instruments — 12,869 — 12,869 Total assets $ — $ 1,381,887 $ — $ 1,381,887 Liabilities Derivative financial instruments $ — $ 15,794 $ — $ 15,794 Total liabilities $ — $ 15,794 $ — $ 15,794 December 31, 2020 ($ in thousands) Quoted Prices in Significant Significant Total Fair Assets Securities available-for-sale Obligations of U.S. Government-sponsored enterprises $ — $ 15,161 $ — $ 15,161 Obligations of states and political subdivisions — 344,232 — 344,232 Residential mortgage-backed securities — 526,572 — 526,572 Corporate debt securities — 14,998 — 14,998 U.S. Treasury Bills — 11,466 — 11,466 Total securities available-for-sale — 912,429 — 912,429 Derivative financial instruments — 28,703 — 28,703 Total assets $ — $ 941,132 $ — $ 941,132 Liabilities Derivative financial instruments $ — $ 34,967 $ — $ 34,967 Total liabilities $ — $ 34,967 $ — $ 34,967
Summary of Financial Instruments and Non-Financial Assets Measured at Fair Value on a Non-Recurring Basis	The following table presents financial instruments and non-financial assets measured at fair value on a non-recurring basis as of December 31, 2021 and 2020. December 31, 2021 (1) (1) (1) (1) ($ in thousands) Total Fair Value Quoted Prices in Active Significant Significant Total losses for the year ended Impaired loans $ 6,406 $ — $ — $ 6,406 $ 3,500 Other real estate 632 — — 632 29 Loan servicing asset 3,146 $ 3,146 $ — $ 156 Total $ 10,184 $ — $ 3,146 $ 7,038 $ 3,685 December 31, 2020 (1) (1) (1) (1) ($ in thousands) Total Fair Value Quoted Prices in Active Significant Significant Total losses for the year ended Impaired loans $ 1,247 $ — $ — $ 1,247 $ 4,486 Other real estate 3,600 — — 3,600 1,000 Total $ 4,847 $ — $ — $ 4,847 $ 5,486 (1) The amounts represent balances measured at fair value during the period and still held as of the reporting date.
Summary of Carrying Amount and Fair Values of Financial Instruments Reported on the Balance Sheets	Following is a summary of the carrying amounts and fair values of the Company’s financial instruments on the consolidated balance sheets at December 31, 2021 and 2020. This summary excludes certain financial assets and liabilities for which carrying value approximates fair value and financial instruments that are recorded at fair value on a recurring basis disclosed above. Financial instruments for which carrying values approximate fair value include cash and due from banks, federal funds sold, interest bearing deposits, accrued interest receivable/payable, demand, savings and money market deposits. December 31, 2021 December 31, 2020 ($ in thousands) Carrying Amount Estimated fair value Level Carrying Amount Estimated fair value Level Balance sheet assets Securities held-to-maturity $ 429,681 $ 434,672 Level 2 $ 487,610 $ 501,523 Level 2 Other investments 56,884 56,884 Level 2 48,764 48,764 Level 2 Loans held-for-sale 6,389 6,389 Level 2 13,564 13,564 Level 2 Loans, net 8,872,601 8,869,891 Level 3 7,088,264 7,067,562 Level 3 State tax credits, held-for-sale 27,994 30,686 Level 3 36,853 39,925 Level 3 Servicing asset 6,714 6,714 Level 2 5,721 5,721 Level 2 Balance sheet liabilities Certificates of deposit $ 608,293 $ 606,177 Level 3 $ 550,095 $ 553,946 Level 3 Subordinated debentures and notes 154,899 155,972 Level 2 203,637 192,889 Level 2 FHLB advances 50,000 51,527 Level 2 50,000 51,871 Level 2 Other borrowings 353,863 353,863 Level 2 301,081 301,081 Level 2
Schedule of Estimated Fair Values of Financial Instruments Not Recorded at Fair Value on Balance Sheet

Parent Company Only Condensed_3

Parent Company Only Condensed Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2021
Condensed Financial Information Disclosure [Abstract]
Condensed Balance Sheets	Condensed Balance Sheets December 31, ($ in thousands) 2021 2020 Assets Cash $ 94,760 $ 75,475 Investment in Bank 1,568,796 1,200,689 Investment in nonbank subsidiaries 14,302 9,778 Other assets 33,847 35,108 Total assets $ 1,711,705 $ 1,321,050 Liabilities and Shareholders’ Equity Subordinated debentures and notes $ 154,899 $ 203,637 Notes payable 22,857 30,000 Accounts payable and other liabilities 4,833 8,439 Shareholders' equity 1,529,116 1,078,974 Total liabilities and shareholders' equity $ 1,711,705 $ 1,321,050
Condensed Statements of Operations	Condensed Statements of Operations Year ended December 31, ($ in thousands) 2021 2020 2019 Income: Dividends from Bank $ 95,000 $ 37,000 $ 60,000 Dividends from nonbank subsidiaries 2,000 1,400 1,500 Other 3,600 483 663 Total income 100,600 38,883 62,163 Expenses: Interest expense 11,406 10,590 8,689 Other expenses 11,037 6,946 6,936 Total expenses 22,443 17,536 15,625 Income before taxes and equity in undistributed earnings of subsidiaries 78,157 21,347 46,538 Income tax benefit 3,710 3,448 3,478 Net income before equity in undistributed earnings of subsidiaries 81,867 24,795 50,016 Equity in undistributed earnings of subsidiaries 51,188 49,589 42,723 Net income $ 133,055 $ 74,384 $ 92,739 The following table presents miscellaneous income and other expense components that exceed one percent of the aggregate of total interest income and other income in one or more of the periods indicated: Year ended December 31, ($ in thousands) 2021 2020 2019 Miscellaneous income: Community development fees $ 5,491 $ 3,353 $ 889 Other miscellaneous income 16,657 13,609 11,007 Total miscellaneous income $ 22,148 $ 16,962 $ 11,896 Other expense: Amortization expense $ 5,691 $ 5,673 $ 5,543 Banking expenses 6,123 4,921 5,258 Customer analysis expense 12,104 1,246 — FDIC and other insurance 5,789 3,897 2,380 Loan, legal expenses 7,130 4,003 3,526 Meals and entertainment 1,253 742 3,670 Outside services 4,992 4,961 4,335 Other expenses 19,593 18,807 17,119 Total other noninterest expenses $ 62,675 $ 44,250 $ 41,831
Condensed Statements of Cash Flow	Condensed Statements of Cash Flows Year ended December 31, ($ in thousands) 2021 2020 2019 Cash flows from operating activities: Net income $ 133,055 $ 74,384 $ 92,739 Adjustments to reconcile net income to net cash provided by (used in) operating activities: Share-based compensation 6,017 4,178 4,032 Net income of subsidiaries (148,188) (87,989) (104,223) Dividends from subsidiaries 97,000 38,400 61,500 Other, net (16) 3,588 (1,063) Net cash provided by operating activities 87,868 32,561 52,985 Cash flows from investing activities: Proceeds (cash paid) for acquisitions, net of cash acquired 2,346 (1,243) (36,015) Purchases of other investments (2,204) (1,166) (2,634) Proceeds from distributions on other investments 2,656 765 1,271 Net cash provided by (used in) investing activities 2,798 (1,644) (37,378) Cash flows from financing activities: Proceeds from issuance of subordinated notes — 61,953 — Payments for the redemption of subordinated notes (50,000) — — Proceeds from notes payable — — 1,000 Repayments of notes payable — — (3,000) Proceeds from issuance of long-term debt — — 40,000 Repayment of long-term debt (7,143) (4,286) (5,714) Cash dividends paid (26,153) (19,795) (16,569) Payments for the repurchase of common stock (60,589) (15,347) (15,526) Proceeds from issuance of preferred stock 71,988 — — Other 516 78 (212) Net cash provided by (used in) financing activities (71,381) 22,603 (21) Net increase in cash and cash equivalents 19,285 53,520 15,586 Cash and cash equivalents, beginning of year 75,475 21,955 6,369 Cash and cash equivalents, end of year $ 94,760 $ 75,475 $ 21,955 Supplemental disclosures of cash flow information: Noncash transactions: Common shares issued in connection with acquisitions $ 343,650 $ 167,035 $ 171,885

Supplemental Financial Inform_2

Supplemental Financial Information (Tables)	12 Months Ended
	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Supplemental Financial Information	Condensed Statements of Operations Year ended December 31, ($ in thousands) 2021 2020 2019 Income: Dividends from Bank $ 95,000 $ 37,000 $ 60,000 Dividends from nonbank subsidiaries 2,000 1,400 1,500 Other 3,600 483 663 Total income 100,600 38,883 62,163 Expenses: Interest expense 11,406 10,590 8,689 Other expenses 11,037 6,946 6,936 Total expenses 22,443 17,536 15,625 Income before taxes and equity in undistributed earnings of subsidiaries 78,157 21,347 46,538 Income tax benefit 3,710 3,448 3,478 Net income before equity in undistributed earnings of subsidiaries 81,867 24,795 50,016 Equity in undistributed earnings of subsidiaries 51,188 49,589 42,723 Net income $ 133,055 $ 74,384 $ 92,739 The following table presents miscellaneous income and other expense components that exceed one percent of the aggregate of total interest income and other income in one or more of the periods indicated: Year ended December 31, ($ in thousands) 2021 2020 2019 Miscellaneous income: Community development fees $ 5,491 $ 3,353 $ 889 Other miscellaneous income 16,657 13,609 11,007 Total miscellaneous income $ 22,148 $ 16,962 $ 11,896 Other expense: Amortization expense $ 5,691 $ 5,673 $ 5,543 Banking expenses 6,123 4,921 5,258 Customer analysis expense 12,104 1,246 — FDIC and other insurance 5,789 3,897 2,380 Loan, legal expenses 7,130 4,003 3,526 Meals and entertainment 1,253 742 3,670 Outside services 4,992 4,961 4,335 Other expenses 19,593 18,807 17,119 Total other noninterest expenses $ 62,675 $ 44,250 $ 41,831

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2021USD ($)segment	Dec. 31, 2020USD ($)
Property, Plant and Equipment [Line Items]
Operating Lease, Right-of-Use Asset		$ 13,483	$ 13,636
Number of reportable segments | segment		1
Operating Lease, Liability		$ 14,865	14,152
Servicing Asset		6,700
Accrued interest receivable		$ 30,600	$ 31,100
Furniture, Fixtures and Equipment [Member] | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life		3 years
Furniture, Fixtures and Equipment [Member] | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life		10 years
Building and Leasehold Improvements [Member] | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life		10 years
Building and Leasehold Improvements [Member] | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life		40 years
Core Deposits [Member]
Property, Plant and Equipment [Line Items]
Finite-lived intangible assets useful life	10 years	10 years
State and Local Jurisdiction [Member]
Property, Plant and Equipment [Line Items]
Right to receive state tax credit at agreed upon rates		10 years

Acquisition - Narrative (Detail

Acquisition - Narrative (Details) $ / shares in Units, $ in Thousands	Jul. 21, 2021USD ($)office$ / sharesshares	Dec. 31, 2021USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Share Price | $ / shares	$ 44.01
First Choice Bancorp
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Banking Offices | office	8
Business Acquisition, Equity Interest Issued or Issuable Per Acquired Share	0.6603
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares	7,800,000
Value of transaction	$ 346,000	$ 345,802
Amount payable to FCB stock option holders	$ 2,100
Merger-related costs		18,800
Total revenue from First Choice Bancorp		40,500
Pre-tax net income from First Choice Bancorp		25,900
Financing Receivable, Credit Loss, Expense (Reversal)		$ 25,400

Acquisition - Summary of Assets

Acquisition - Summary of Assets Acquired and Liabilities Assumed (Details) - USD ($)	Jul. 21, 2021	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans			$ 8,872,601,000	$ 7,088,264,000
Goodwill			365,164,000	260,567,000	$ 210,344,000
Goodwill Acquired Through Acquisition			104,597,000	$ 50,223,000
Common stock consideration			342,280
Shares withheld on the settlement of share-based awards			1,370
First Choice Bancorp
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	$ 214,794,000		214,794,000
Adjustments, Cash		$ 0
Securities	34,533,000		34,489,000
Adjustments, Securities		(44,000)
Loans	1,937,635,000
Allowance	(19,626,000)
Other investments	19,178,000		19,316,000
Adjustments, Other Invesments		138,000
Fixed assets	1,869,000		999,000
Adjustments, Fixed Assets		(870,000)
Accrued interest receivable	7,131,000		7,151,000
Adjustments, Accrued Interest Receivable		20,000
Goodwill	73,425,000
Adjustments, Goodwill		(73,425,000)
goodwill elimination balance			0
Intangible assets	4,517,000		4,892,000
Adjustments, Intangible Assets		375,000
Deferred tax assets	7,558,000		5,615,000
Adjustments, Deferred Tax Assets		(1,943,000)
Other assets	23,024,000		24,669,000
Adjustments, Other Assets		1,645,000
Total assets acquired	2,304,038,000		2,248,062,000
Adjustments, Total Assets Acquired		(55,976,000)
Deposits assumed	1,840,716,000		1,840,429,000
Adjustments, Deposits		(287,000)
FHLB advances	160,000,000		160,000,000
Adjustments, FHLB advances		0
Accrued interest payable	124,000		124,000
Adjustments, Accrued interest payable		0
Other liabilities	8,464,000		6,304,000
Adjustments, other liabilities		(2,160,000)
Total liabilities assumed	2,009,304,000		2,006,857,000
Adjustments, Total liabilities assumed		(2,447,000)
Net assets acquired	294,734,000		241,205,000
Adjustments, Net assets acquired		$ (53,529,000)
Cash			2,152,000
Common stock			343,650,000
Total consideration paid	$ 346,000,000		345,802,000
Goodwill Acquired Through Acquisition			104,597,000
First Choice Bancorp | Core Deposits [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Useful life	10 years
Adjustments associated with acquisition
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans	$ 5,508,000
Adjustments, Allowance	$ 12,620,000
As Recorded by Acquiree
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans			1,943,143,000
Allowance			$ (7,006,000)

Acquisition - Schedule of Pro F

Acquisition - Schedule of Pro Forma Results (Details) - First Choice Bancorp - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue	$ 488,280	$ 420,487
Business Acquisition, Pro Forma Net Income (Loss)	$ 188,416	$ 67,275
Business Acquisition, Pro Forma Earnings Per Share, Diluted	$ 4.86	$ 1.94

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share
Net Income (Loss) Attributable to Parent	$ 133,055	$ 74,384	$ 92,739
Weighted average common shares outstanding (in shares)	34,436,000	26,954,000	26,045,000
Additional dilutive common stock equivalents (in shares)	60,000	35,000	114,000
Weighted average diluted common shares outstanding (in shares)	34,496,000	26,989,000	26,159,000
Basic earnings per common share (in dollars per share)	$ 3.86	$ 2.76	$ 3.56
Diluted earnings per common share (in dollars per share)	$ 3.86	$ 2.76	$ 3.55
Common stock equivalents excluded from earnings per share calculations due to anti-dilutive effect (in shares)	158,000	156,000	21,000
Convertible Debt Securities
Debt Instrument, Interest Rate, Stated Percentage [Abstract]
Convertible trust preferred securities, interest rate, stated percentage

Investments - Schedule of Avail

Investments - Schedule of Available-for-sale and Held-to-Maturity Securities Reconciliation (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	$ 1,358,960	$ 882,682
Gross Unrealized Gains	15,247	30,104
Gross Unrealized Losses	(8,201)	(357)
Securities available-for-sale	1,366,006	912,429
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	430,295	488,059
Gross Unrealized Gains	5,773	13,960
Gross Unrealized Losses	(1,396)	(496)
Allowance for Credit Losses	(614)	(449)
Debt Securities, Held-to-maturity, Fair Value	434,672	501,523
debt securities, held to maturity, net of alloawance for credit losses	429,681	487,610
Obligations of U.S. Government-sponsored enterprises
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	175,409	14,978
Gross Unrealized Gains	3	186
Gross Unrealized Losses	(1,901)	(3)
Securities available-for-sale	173,511	15,161
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	571,587	335,271
Gross Unrealized Gains	5,907	8,994
Gross Unrealized Losses	(2,410)	(33)
Securities available-for-sale	575,084	344,232
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	236,379	248,324
Gross Unrealized Gains	1,794	2,814
Gross Unrealized Losses	(730)	0
Debt Securities, Held-to-maturity, Fair Value	237,443	251,138
Agency mortgage-backed securities
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	509,243	506,703
Gross Unrealized Gains	8,485	20,190
Gross Unrealized Losses	(3,869)	(321)
Securities available-for-sale	513,859	526,572
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	68,105	112,742
Gross Unrealized Gains	940	2,295
Gross Unrealized Losses	(666)	(496)
Debt Securities, Held-to-maturity, Fair Value	68,379	114,541
US Treasury Bill Securities [Member]
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	11,750	14,750
Gross Unrealized Gains	632	248
Gross Unrealized Losses	0	0
Securities available-for-sale	12,382	14,998
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	90,971	10,980
Gross Unrealized Gains	220	486
Gross Unrealized Losses	(21)	0
Securities available-for-sale	91,170	11,466
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	125,811	126,993
Gross Unrealized Gains	3,039	8,851
Gross Unrealized Losses	0	0
Debt Securities, Held-to-maturity, Fair Value	$ 128,850	$ 135,844

Investments - Investments Class

Investments - Investments Classified by Contractual Maturity Date (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Available for sale, Amortized Cost
Due in one year or less	$ 81,809
Due after one year through five years	166,470
Due after five years through ten years	40,130
Due after ten years	561,308
Agency mortgage-backed securities	509,243
Amortized Cost	1,358,960	$ 882,682
Available for sale, Estimated Fair Value
Due in one year or less	81,797
Due after one year through five years	165,161
Due after five years through ten years	40,568
Due after ten years	564,621
Agency mortgage-backed securities	513,859
Securities available-for-sale	1,366,006	912,429
Held to maturity, Amortized Cost
Due in one year or less	211
Due after one year through five years	13,793
Due after five years through ten years	143,900
Due after ten years	204,286
Agency mortgage-backed securities	68,105
Amortized Cost	430,295	488,059
Held to maturity, Estimated Fair Value
Due in one year or less	214
Due after one year through five years	13,998
Due after five years through ten years	146,933
Due after ten years	205,148
Agency mortgage-backed securities	68,379
Held to maturity, fair value	$ 434,672	$ 501,523

Investments - Schedule of Unrea

Investments - Schedule of Unrealized Loss on Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 725,830	$ 75,062
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	7,842	357
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	13,117	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	359	0
Debt Securities, Available-for-sale, Unrealized Loss Position	738,947	75,062
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	8,201	357
Obligations of U.S. Government-sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	163,634	4,997
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,775	3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	4,874	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	126	0
Debt Securities, Available-for-sale, Unrealized Loss Position	168,508	4,997
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	1,901	3
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	242,188	4,079
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2,361	33
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,776	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	49	0
Debt Securities, Available-for-sale, Unrealized Loss Position	243,964	4,079
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	2,410	33
Agency mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	259,047	65,986
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	3,685	321
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	6,467	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	184	0
Debt Securities, Available-for-sale, Unrealized Loss Position	265,514	65,986
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	3,869	$ 321
US Treasury Bill Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	60,961
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	21
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0
Debt Securities, Available-for-sale, Unrealized Loss Position	60,961
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 21

Investments - Schedule of Reali

Investments - Schedule of Realized Gain (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Gross gains realized	$ 0	$ 421	$ 400
Gross losses realized	0	0	(449)
Proceeds from sales	$ 27,135	$ 20,221	$ 357,976

Investments - Narrative (Detail

Investments - Narrative (Details) $ in Thousands	Dec. 31, 2021USD ($)number_of_securities	Dec. 31, 2020USD ($)number_of_securities
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 1,358,960	$ 882,682
Other investments	$ 59,896	$ 48,764
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | number_of_securities	290	30
Gross Unrealized Gains	$ 15,247	$ 30,104
Maximum percentage of shareholders' equity security holdings held of one issuer	10.00%
Available-for-sale securities pledged as collateral, fair value	$ 752,700	525,800
accrued interest receivable, held to maturity securities	3,400	3,600
Debt Securities, Held-to-maturity, Allowance for Credit Loss	614	449
Securities available-for-sale	1,366,006	912,429
Des Moines
Debt Securities, Available-for-sale [Line Items]
Other investments	12,100	10,800
Reclassified to Held to Maturity [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	331,000
Gross Unrealized Gains	21,000	$ 25,600
Securities available-for-sale	$ 352,600

Portfolio Loans - Summary of Po

Portfolio Loans - Summary of Portfolio Loans by Category (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	$ 9,017,642	$ 7,224,935
Non-Covered Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	9,026,780	7,241,074
Unearned loan fees, net	(9,138)	(16,139)
Loans, including unearned loan fees	9,017,642	7,224,935
Non-Covered Loans | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	3,396,590	3,100,299
Non-Covered Loans | Commercial - investor owned
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	2,141,143	1,589,419
Non-Covered Loans | CRE - owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	2,035,785	1,498,408
Non-Covered Loans | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	734,073	546,686
Non-Covered Loans | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	454,052	319,179
Non-Covered Loans | Total real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	5,365,053	3,953,692
Non-Covered Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	$ 265,137	$ 187,083

Portfolio Loans - Summary of Al

Portfolio Loans - Summary of Allowance for Loan Losses by Portfolio Class and Category (Details) - Non-Covered Loans - USD ($) $ in Thousands	Jan. 01, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Nov. 12, 2020
Allowance for Loan Losses [Roll Forward]
Balance, beginning of year	$ 42,567	$ 136,671	$ 42,567	$ 42,295
CECL adoption	28,387
PCD loans immediately charged off	(1,680)	(13,000)	(63,400)	(6,700)
Provision (benefit) for loan losses		12,993	63,379	6,682
Initial Allowance on Acquired PCD Loans		7,006			$ 3,524
Charge-offs		(17,185)	(6,739)	(8,594)
Recoveries		5,556	6,512	2,184
Balance, end of year	69,995	145,041	136,671	42,567
Financing Receivable, Allowance For Credit Losses, Organic				42,567
Financing Receivable, Allowance For Credit Losses, Purchased Credit Impaired				721
Commercial and industrial
Allowance for Loan Losses [Roll Forward]
Balance, beginning of year	27,296	58,812	27,296	29,039
CECL adoption	6,494
PCD loans immediately charged off	0
Provision (benefit) for loan losses		14,361	28,373	4,801
Initial Allowance on Acquired PCD Loans		1,077			23
Charge-offs		(12,113)	(5,381)	(6,882)
Recoveries		1,688	1,848	338
Balance, end of year	33,949	63,825	58,812	27,296
Financing Receivable, Allowance For Credit Losses, Organic				27,296
Financing Receivable, Allowance For Credit Losses, Purchased Credit Impaired				159
Commercial - investor owned
Allowance for Loan Losses [Roll Forward]
Balance, beginning of year	5,935	32,062	5,935	4,683
CECL adoption	10,726
PCD loans immediately charged off	(5)
Provision (benefit) for loan losses		568	11,037	1,708
Initial Allowance on Acquired PCD Loans		3,651			2,026
Charge-offs		(2,487)	(498)	(551)
Recoveries		2,083	2,841	95
Balance, end of year	16,656	35,877	32,062	5,935
Financing Receivable, Allowance For Credit Losses, Organic				5,935
Financing Receivable, Allowance For Credit Losses, Purchased Credit Impaired				0
CRE - owner occupied
Allowance for Loan Losses [Roll Forward]
Balance, beginning of year	4,873	17,012	4,873	4,239
CECL adoption	2,598
PCD loans immediately charged off	(57)
Provision (benefit) for loan losses		(550)	7,845	673
Initial Allowance on Acquired PCD Loans		1,504			1,427
Charge-offs		(602)	(30)	(58)
Recoveries		196	356	19
Balance, end of year	7,414	17,560	17,012	4,873
Financing Receivable, Allowance For Credit Losses, Organic				4,873
Financing Receivable, Allowance For Credit Losses, Purchased Credit Impaired				0
Construction and land development
Allowance for Loan Losses [Roll Forward]
Balance, beginning of year	2,472	21,413	2,472	1,987
CECL adoption	5,183
PCD loans immediately charged off	(217)
Provision (benefit) for loan losses		(7,365)	13,438	(237)
Initial Allowance on Acquired PCD Loans		37			45
Charge-offs		(3)	(31)	(54)
Recoveries		454	384	776
Balance, end of year	7,577	14,536	21,413	2,472
Financing Receivable, Allowance For Credit Losses, Organic				2,472
Financing Receivable, Allowance For Credit Losses, Purchased Credit Impaired				139
Residential real estate
Allowance for Loan Losses [Roll Forward]
Balance, beginning of year	1,280	4,585	1,280	1,616
CECL adoption	3,470
PCD loans immediately charged off	(1,401)
Provision (benefit) for loan losses		3,900	674	(330)
Initial Allowance on Acquired PCD Loans		0			3
Charge-offs		(1,521)	(408)	(667)
Recoveries		963	967	661
Balance, end of year	3,349	7,927	4,585	1,280
Financing Receivable, Allowance For Credit Losses, Organic				1,280
Financing Receivable, Allowance For Credit Losses, Purchased Credit Impaired				0
Other
Allowance for Loan Losses [Roll Forward]
Balance, beginning of year	711	2,787	711	731
CECL adoption	(84)
PCD loans immediately charged off	0
Provision (benefit) for loan losses		2,079	2,012	67
Initial Allowance on Acquired PCD Loans		737			$ 0
Charge-offs		(459)	(391)	(382)
Recoveries		172	116	295
Balance, end of year	$ 1,050	$ 5,316	$ 2,787	711
Financing Receivable, Allowance For Credit Losses, Organic				711
Financing Receivable, Allowance For Credit Losses, Purchased Credit Impaired				$ 423

Portfolio Loans - Collateral De

Portfolio Loans - Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Commercial Real Estate
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual	$ 7,247	$ 20,835
Commercial Real Estate | Commercial and industrial | Commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual	4,271	8,316
Commercial Real Estate | Residential | Residential real estate
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual	0	0
Commercial Real Estate | Unallocated Financing Receivables | Other
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual		0
Commercial Real Estate | Commercial Portfolio Segment | Commercial - investor owned
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual	169	9,579
Commercial Real Estate | Commercial Portfolio Segment | Commercial - owner occupied
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual	2,807	2,940
Residential
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual	3,489	4,135
Residential | Commercial and industrial | Commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual	209	0
Residential | Residential | Residential real estate
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual	2,048	4,135
Residential | Unallocated Financing Receivables | Other
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual		0
Residential | Commercial Portfolio Segment | Commercial - investor owned
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual	1,200	0
Residential | Commercial Portfolio Segment | Commercial - owner occupied
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual	32	0
Blanket Lien
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual	9,312	394
Blanket Lien | Commercial and industrial | Commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual	9,312	394
Blanket Lien | Residential | Residential real estate
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual	0	0
Blanket Lien | Unallocated Financing Receivables | Other
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual		0
Blanket Lien | Commercial Portfolio Segment | Commercial - investor owned
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual	0	0
Blanket Lien | Commercial Portfolio Segment | Commercial - owner occupied
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual	$ 0	0
Other Collateral
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual		17
Other Collateral | Commercial and industrial | Commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual		0
Other Collateral | Residential | Residential real estate
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual		0
Other Collateral | Unallocated Financing Receivables | Other
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual		17
Other Collateral | Commercial Portfolio Segment | Commercial - investor owned
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual		0
Other Collateral | Commercial Portfolio Segment | Commercial - owner occupied
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual		$ 0

Portfolio Loans - Narrative (De

Portfolio Loans - Narrative (Details) - USD ($) $ in Thousands	Jan. 01, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
financing receivable, paycheck protection program		$ 276,200	$ 709,900
financing receivable, paycheck protection program, net of deferred fees		272,000	698,600
financing recievable, paycheck protection program, unearned fees		4,200	11,300
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available		2,500,000
net premium, acquired loans		11,900
net discount, acquired loans		16,100
Allowance for Credit Losses, Qualitative Adjustment		39,100
Notes Receivable, Related Parties		5,700	5,700
Financing Receivable, Credit Loss, Expense (Reversal), Additional Provision		400	2,000
Financing Receivable, Credit Loss, Expense (Reversal), Acquisition Related Expense		$ 25,400	8,600
Portfolio Loans		LOANS Below is a summary of loans by category at December 31, 2021 and 2020: ($ in thousands) December 31, 2021 December 31, 2020 Commercial and industrial $ 3,396,590 $ 3,100,299 Real estate loans: Commercial - investor owned 2,141,143 1,589,419 Commercial - owner occupied 2,035,785 1,498,408 Construction and land development 734,073 546,686 Residential 454,052 319,179 Total real estate loans 5,365,053 3,953,692 Other 265,137 187,083 Loans, before unearned loan fees 9,026,780 7,241,074 Unearned loan fees, net (9,138) (16,139) Loans, including unearned loan fees $ 9,017,642 $ 7,224,935 PPP loans totaled $276.2 million at December 31, 2021, or $272.0 million net of unearned fees of $4.2 million. PPP loans totaled $709.9 million at December 31, 2020, or $698.6 million net of unearned fees of $11.3 million. The loan balance includes a net premium on acquired loans of $11.9 million and $16.1 million at December 31, 2021 and 2020, respectively. At December 31, 2021 loans of $2.5 billion were pledged to the FHLB and the Federal Reserve. Loans to executive officers and directors, or to entities in which such individuals had beneficial interests as a shareholder, officer, or director totaled $5.7 million for each year ended December 31, 2021 and 2020. Such loans were made in the normal course of business on substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with other customers and did not involve more than the normal risk of collectibility. A summary of the activity, by loan category, in the allowance for loan losses for 2019, excluding the allowance on PCI loans, and the ACL on loans for 2020 and 2021 is as follows: ($ in thousands) Commercial and industrial CRE - investor owned CRE - owner occupied Construction and land development Residential real estate Other Total Balance at December 31, 2019 Allowance for loan losses: Balance, beginning of year $ 29,039 $ 4,683 $ 4,239 $ 1,987 $ 1,616 $ 731 $ 42,295 Provision for loan losses 4,801 1,708 673 (237) (330) 67 6,682 Charge-offs (6,882) (551) (58) (54) (667) (382) (8,594) Recoveries 338 95 19 776 661 295 2,184 Balance, end of year $ 27,296 $ 5,935 $ 4,873 $ 2,472 $ 1,280 $ 711 $ 42,567 Balance at December 31, 2020 Allowance for loan losses: Balance at December 31, 2019 $ 27,296 $ 5,935 $ 4,873 $ 2,472 $ 1,280 $ 711 $ 42,567 PCI allowance at December 31, 2019 159 — — 139 — 423 721 CECL adoption 6,494 10,726 2,598 5,183 3,470 (84) 28,387 PCD loans immediately charged off — (5) (57) (217) (1,401) — (1,680) Balance, beginning of year $ 33,949 $ 16,656 $ 7,414 $ 7,577 $ 3,349 $ 1,050 $ 69,995 Provision for loan losses 28,373 11,037 7,845 13,438 674 2,012 63,379 Initial allowance on acquired PCD loans 23 2,026 1,427 45 3 — 3,524 Charge-offs (5,381) (498) (30) (31) (408) (391) (6,739) Recoveries 1,848 2,841 356 384 967 116 6,512 Balance, end of year $ 58,812 $ 32,062 $ 17,012 $ 21,413 $ 4,585 $ 2,787 $ 136,671 Balance at December 31, 2021 Allowance for credit losses: Balance, beginning of year $ 58,812 $ 32,062 $ 17,012 $ 21,413 $ 4,585 $ 2,787 $ 136,671 Provision (benefit) for loan losses 14,361 568 (550) (7,365) 3,900 2,079 12,993 Initial allowance on acquired PCD loans 1,077 3,651 1,504 37 — 737 7,006 Charge-offs (12,113) (2,487) (602) (3) (1,521) (459) (17,185) Recoveries 1,688 2,083 196 454 963 172 5,556 Balance, end of year $ 63,825 $ 35,877 $ 17,560 $ 14,536 $ 7,927 $ 5,316 $ 145,041 The ACL on sponsor finance loans, which is included in the categories above, represented $18.2 million and $19.0 million as of December 31, 2021 and 2020, respectively. On January 1, 2020, the Company adopted the CECL methodology which added $28.4 million to the ACL on loans. Upon adoption, $1.7 million of nonaccrual PCD loans with individual outstanding balances of less than $100,000 were immediately charged-off. Under the CECL method, the Company recorded $13.0 million and $63.4 million in provision for credit losses on loans for the years ended December 31, 2021 and 2020, respectively. An additional provision for credit losses of $0.4 million and $2.0 million was recorded in 2021 and 2020, respectively, for HTM securities, unfunded commitments and the recapture of accrued interest on nonaccrual loans. In 2019, a $6.7 million provision for loan losses (excluding the allowance release on PCI loans) was recorded under the incurred loss method. Acquisition-related provision expense of $25.4 million and $8.6 million in 2021 and 2020, respectively, was included in the provision for credit losses. This expense, commonly referred to as the “CECL double-count”, is recognized when a loan portfolio is acquired. The CECL methodology incorporates various economic scenarios. The Company utilizes three forecasts in the model; Moody’s baseline, a stronger near-term growth upside and a moderate recession downside forecast. The Company weights these scenarios at 40%, 30%, and 30%, respectively, which added approximately $17.5 million to the ACL over the baseline model. These forecasts incorporate an expectation that government stimulus will decline, the Federal Reserve will wind down quantitative easing and begin raising the federal funds rate, and that the pandemic will begin to slowly recede. The Company has also recognized the risk posed by loans that have received multiple deferrals of principal and interest payments, including the hospitality sector, by allocating additional reserves to those segments. Some of the key risks to the forecasts that could result in future provision for credit losses are additional shutdowns and self-quarantines from another significant wave of COVID, continued or worsening supply-chain issues, labor supply and job growth worsens, or financial market conditions tighten. In addition to the CECL methodology, the Company incorporates qualitative adjustments into the ACL on loans to capture credit risks inherent within the loan portfolio that are not captured in the DCF model. Included in these risks are 1) changes in lending policies and procedures, 2) actual and expected changes in business and economic conditions, 3) changes in the nature and volume of the portfolio, 4) changes in lending management, 5) changes in volume and the severity of past due loans, 6) changes in the quality of the loan review system, 7) changes in the value of underlying collateral, 8) the existence and effect of concentrations of credit and 9) other factors such as the regulatory, legal and competitive environments and events such as natural disasters and pandemics. At December 31, 2021, the ACL on loans included a qualitative adjustment of approximately $39.1 million. Of this amount, approximately $8.6 million was allocated to Sponsor Finance loans due to their unsecured nature. The recorded investment in nonperforming loans by category at December 31, 2021 and 2020 is as follows: December 31, 2021 ($ in thousands) Non-accrual Restructured, accruing Loans over 90 days past due and still accruing interest Total nonperforming loans Nonaccrual loans with no allowance Commercial and industrial $ 17,052 $ 2,783 $ 1,703 $ 21,538 $ 5,685 Real estate: Commercial - investor owned 1,575 — — 1,575 168 Commercial - owner occupied 2,839 — — 2,839 2,550 Residential 1,971 76 1 2,048 1,348 Other 12 — 12 24 — Total $ 23,449 $ 2,859 $ 1,716 $ 28,024 $ 9,751 December 31, 2020 ($ in thousands) Non-accrual Restructured, accruing Loans over 90 days past due and still accruing interest Total nonperforming loans Nonaccrual loans with no allowance Commercial and industrial $ 18,158 $ 3,482 $ 130 $ 21,770 $ 8,316 Real estate: Commercial - investor owned 9,579 — — 9,579 716 Commercial - owner occupied 2,940 — — 2,940 6,024 Residential 4,112 77 — 4,189 — Other 29 — — 29 3,190 Total $ 34,818 $ 3,559 $ 130 $ 38,507 $ 18,246 The amortized cost basis of collateral-dependent nonperforming loans by class of loan is presented for the periods indicated: December 31, 2021 Type of Collateral (in thousands) Commercial Real Estate Residential Real Estate Blanket Lien Commercial and industrial $ 4,271 $ 209 $ 9,312 Real estate: Commercial - investor owned 169 1,200 — Commercial - owner occupied 2,807 32 — Residential — 2,048 — Total $ 7,247 $ 3,489 $ 9,312 December 31, 2020 Type of Collateral (in thousands) Commercial Real Estate Residential Real Estate Blanket Lien Other Commercial and industrial $ 8,316 $ — $ 394 $ — Real estate: Commercial - investor owned 9,579 — — — Commercial - owner occupied 2,940 — — — Residential — 4,135 — — Other — — — 17 Total $ 20,835 $ 4,135 $ 394 $ 17 The recorded investment by category for loans restructured during the years ended December 31, 2021 and 2020 is as follows: Year ended December 31, 2021 Year ended December 31, 2020 ($ in thousands, except for number of loans) Number of Loans Pre-Modification Outstanding Post-Modification Outstanding Number of Loans Pre-Modification Outstanding Post-Modification Outstanding Commercial and industrial — $ — $ — 3 $ 7,447 $ 7,447 Real estate: Residential 1 221 221 3 372 372 Total 1 $ 221 $ 221 6 $ 7,819 $ 7,819 Restructured loans primarily resulted from interest rate concessions. As of December 31, 2021, the Company allocated an immaterial amount in specific reserves to loans that have been restructured. Loans restructured that subsequently defaulted during the year ended December 31, 2021 are as follows: Year ended December 31, 2021 ($ in thousands, except for number of loans) Number of Loans Recorded Balance Real Estate: Residential 1 148 There were no restructured loans that subsequently defaulted during the year ended December 31, 2020. In response to the COVID-19 pandemic, the Company implemented short-term deferral programs allowing customers to primarily defer payments for up to 90 days. Deferrals under the CARES Act or interagency guidance are not included above as troubled debt restructurings. As of December 31, 2021, substantially all of these loans have returned to a current payment status. The aging of the recorded investment in past due loans by class and category at December 31, 2021 and 2020 is shown below: December 31, 2021 ($ in thousands) 30-89 Days 90 or More Total Current Total Commercial and industrial $ 24,447 $ 14,158 $ 38,605 $ 3,353,770 $ 3,392,375 Real estate: Commercial - investor owned 3,880 — 3,880 2,137,263 2,141,143 Commercial - owner occupied 10,070 289 10,359 2,025,426 2,035,785 Construction and land development 24 — 24 734,049 734,073 Residential 3,181 1,305 4,486 449,566 454,052 Other 37 11 48 260,166 260,214 Total $ 41,639 $ 15,763 $ 57,402 $ 8,960,240 $ 9,017,642 December 31, 2020 ($ in thousands) 30-89 Days 90 or More Total Current Total Commercial and industrial $ 8,652 $ 12,928 $ 21,580 $ 3,067,415 $ 3,088,995 Real estate: Commercial - investor owned 734 9,301 10,035 1,579,384 1,589,419 Commercial - owner occupied 328 4,647 4,975 1,493,433 1,498,408 Construction and land development 13 — 13 546,673 546,686 Residential 2,071 2,118 4,189 314,990 319,179 Other 1,731 50 1,781 180,467 182,248 Total $ 13,529 $ 29,044 $ 42,573 $ 7,182,362 $ 7,224,935 The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt, such as current financial information, historical payment experience, credit documentation, and current economic factors among other factors. This analysis is performed on a quarterly basis. The Company uses the following definitions for risk ratings: • Grades 1, 2, and 3 – Includes loans to borrowers with a continuous record of strong earnings, sound balance sheet condition and capitalization, ample liquidity with solid cash flow, and whose management team has experience and depth within their industry. • Grade 4 – Includes loans to borrowers with positive trends in profitability, satisfactory capitalization and balance sheet condition, and sufficient liquidity and cash flow. • Grade 5 – Includes loans to borrowers that may display fluctuating trends in sales, profitability, capitalization, liquidity, and cash flow. • Grade 6 – Includes loans to borrowers where an adverse change or perceived weakness has occurred, but may be correctable in the near future. Alternatively, this rating category may also include circumstances where the borrower is starting to reverse a negative trend or condition, or has recently been upgraded from a 7, 8, or 9 rating. • Grade 7 – Watch credits are borrowers that have experienced financial setback of a nature that is not determined to be severe or influence ‘ongoing concern’ expectations. Although possible, no loss is anticipated, due to strong collateral and/or guarantor support. • Grade 8 – Substandard credits will include those borrowers characterized by significant losses and sustained downward trends in balance sheet condition, liquidity, and cash flow. Repayment reliance may have shifted to secondary sources. Collateral exposure may exist and additional reserves may be warranted. • Grade 9 – Doubtful credits include borrowers that may show deteriorating trends that are unlikely to be corrected. Collateral values may appear insufficient for full recovery, therefore requiring a partial charge-off, or debt renegotiation with the borrower. The borrower may have declared bankruptcy or bankruptcy is likely in the near term. All doubtful rated credits will be on non-accrual. The recorded investment by risk category of the loans by class and year of origination is presented in the following tables as of the dates indicated: December 31, 2021 Term Loans by Origination Year (in thousands) 2021 2020 2019 2018 2017 Prior Revolving Loans Converted to Term Loans Revolving Loans Total Commercial and industrial Pass (1-6) $ 1,180,601 $ 477,374 $ 317,869 $ 132,851 $ 116,738 $ 82,846 $ 11,648 $ 854,102 $ 3,174,029 Watch (7) 35,005 17,502 9,404 9,880 12,217 10,979 4,037 53,595 152,619 Classified (8-9) 14,917 3,530 3,840 1,689 2,988 813 787 10,996 39,560 Total Commercial and industrial $ 1,230,523 $ 498,406 $ 331,113 $ 144,420 $ 131,943 $ 94,638 $ 16,472 $ 918,693 $ 3,366,208 Commercial real estate-investor owned Pass (1-6) $ 651,740 $ 476,946 $ 346,245 $ 146,107 $ 112,043 $ 217,808 $ 3,625 $ 68,236 $ 2,022,750 Watch (7) 16,871 35,908 32,755 1,003 502 17,478 300 2,062 106,879 Classified (8-9) 1,376 3,135 835 817 1,159 4,141 — 50 11,513 Total Commercial real estate-investor owned $ 669,987 $ 515,989 $ 379,835 $ 147,927 $ 113,704 $ 239,427 $ 3,925 $ 70,348 $ 2,141,142 Commercial real estate-owner occupied Pass (1-6) $ 604,975 $ 423,263 $ 278,830 $ 164,210 $ 140,515 $ 235,973 $ 250 $ 48,349 $ 1,896,365 Watch (7) 12,825 13,585 4,301 16,774 10,274 15,764 — 300 73,823 Classified (8-9) 2,048 556 9,181 17,016 6,432 6,959 — — 42,192 Total Commercial real estate-owner occupied $ 619,848 $ 437,404 $ 292,312 $ 198,000 $ 157,221 $ 258,696 $ 250 $ 48,649 $ 2,012,380 Construction real estate Pass (1-6) $ 310,140 $ 229,396 $ 70,531 $ 35,936 $ 14,860 $ 7,180 $ 568 $ 2,992 $ 671,603 Watch (7) 28,947 15,348 60 1,199 11,068 2,330 — — 58,952 Classified (8-9) — — 387 419 — 22 — — 828 Total Construction real estate $ 339,087 $ 244,744 $ 70,978 $ 37,554 $ 25,928 $ 9,532 $ 568 $ 2,992 $ 731,383 Residential real estate Pass (1-6) $ 116,352 $ 66,481 $ 21,356 $ 14,841 $ 24,778 $ 103,840 $ 9,980 $ 87,146 $ 444,774 Watch (7) 2,425 2 622 1,157 248 1,305 — 79 5,838 Classified (8-9) 414 169 554 — 12 2,024 — — 3,173 Total residential real estate $ 119,191 $ 66,652 $ 22,532 $ 15,998 $ 25,038 $ 107,169 $ 9,980 $ 87,225 $ 453,785 Other Pass (1-6) $ 108,209 $ 68,806 $ 22,684 $ 23,145 $ 6,924 $ 13,832 $ 1,500 $ 9,166 $ 254,266 Watch (7) — — — 4 — 2,440 — 1 2,445 Classified (8-9) — — 10 10 — 16 — 2 38 Total Other $ 108,209 $ 68,806 $ 22,694 $ 23,159 $ 6,924 $ 16,288 $ 1,500 $ 9,169 $ 256,749 Total loans classified by risk category $ 3,086,845 $ 1,832,001 $ 1,119,464 $ 567,058 $ 460,758 $ 725,750 $ 32,695 $ 1,137,076 $ 8,961,647 Total loans classified by performing status 55,995 Total loans $ 9,017,642 December 31, 2020 Term Loans by Origination Year (in thousands) 2020 2019 2018 2017 2016 Prior Revolving Loans Converted to Term Loans Revolving Loans Total Commercial and industrial Pass (1-6) $ 1,402,276 $ 454,729 $ 262,258 $ 132,832 $ 25,057 $ 58,315 $ 14,118 $ 527,170 $ 2,876,755 Watch (7) 44,922 15,369 9,585 7,509 19,613 110 — 60,448 157,556 Classified (8-9) 6,602 9,219 3,115 3,964 4,490 1,080 1,281 22,432 52,183 Total Commercial and industrial $ 1,453,800 $ 479,317 $ 274,958 $ 144,305 $ 49,160 $ 59,505 $ 15,399 $ 610,050 $ 3,086,494 Commercial real estate-investor owned Pass (1-6) $ 481,867 $ 338,843 $ 189,305 $ 131,718 $ 138,288 $ 161,439 $ 6,509 $ 32,058 $ 1,480,027 Watch (7) 32,308 19,722 6,656 — 9,647 17,370 — — 85,703 Classified (8-9) — 5,278 8,716 5,830 1,245 2,620 — — 23,689 Total Commercial real estate-investor owned $ 514,175 $ 363,843 $ 204,677 $ 137,548 $ 149,180 $ 181,429 $ 6,509 $ 32,058 $ 1,589,419 Commercial real estate-owner occupied Pass (1-6) $ 419,142 $ 287,001 $ 215,181 $ 179,382 $ 104,470 $ 167,456 $ 2,672 $ 45,323 $ 1,420,627 Watch (7) 13,657 5,257 3,113 6,198 4,338 8,460 1,776 941 43,740 Classified (8-9) 2,420 7,427 5,822 6,140 1,309 10,860 — 63 34,041 Total Commercial real estate-owner occupied $ 435,219 $ 299,685 $ 224,116 $ 191,720 $ 110,117 $ 186,776 $ 4,448 $ 46,327 $ 1,498,408 Construction real estate Pass (1-6) $ 223,069 $ 156,360 $ 45,460 $ 18,579 $ 11,539 $ 9,144 $ — $ 28,880 $ 493,031 Watch (7) 2,544 86 34,179 11,632 — 2,499 — — 50,940 Classified (8-9) 56 2,124 503 1 — 31 — — 2,715 Total Construction real estate $ 225,669 $ 158,570 $ 80,142 $ 30,212 $ 11,539 $ 11,674 $ — $ 28,880 $ 546,686 Residential real estate Pass (1-6) $ 57,059 $ 27,907 $ 17,718 $ 17,138 $ 27,443 $ 92,657 $ 1,172 $ 66,902 $ 307,996 Watch (7) 210 840 526 — 514 1,603 287 511 4,491 Classified (8-9) 571 733 121 14 898 3,181 — 253 5,771 Total residential real estate $ 57,840 $ 29,480 $ 18,365 $ 17,152 $ 28,855 $ 97,441 $ 1,459 $ 67,666 $ 318,258 Other Pass (1-6) $ 43,526 $ 28,195 $ 30,074 $ 9,646 $ 5,641 $ 17,027 $ — $ 40,779 $ 174,888 Watch (7) — 1 8 — — 2,637 — 1 2,647 Classified (8-9) — 18 19 13 — 17 8 4 79 Total Other $ 43,526 $ 28,214 $ 30,101 $ 9,659 $ 5,641 $ 19,681 $ 8 $ 40,784 $ 177,614 Total loans classified by risk category $ 2,730,229 $ 1,359,109 $ 832,359 $ 530,596 $ 354,492 $ 556,506 $ 27,823 $ 825,765 $ 7,216,879 Total loans classified by performing status 8,056 Total loans $ 7,224,935 In the tables above, loan originations in 2021 and 2020 with a classification of watch or classified primarily represent renewals or modifications initially underwritten and originated in prior years. For certain loans, primarily credit cards, the Company evaluates credit quality based on the aging status. The following tables present the recorded investment on loans based on aging status: December 31, 2021 (in thousands) Performing Non Performing Total Commercial and industrial $ 26,166 $ 1 $ 26,167 Real estate: Commercial - investor owned 1 — 1 Commercial - owner occupied 23,405 — 23,405 Construction and land development 2,690 — 2,690 Residential 267 — 267 Other 3,453 12 3,465 Total $ 55,982 $ 13 $ 55,995 December 31, 2020 (in thousands) Performing Non Performing Total Commercial and industrial $ 2,502 $ — $ 2,502 Real estate: Residential 921 — 921 Other 4,612 21 4,633 Total $ 8,035 $ 21 $ 8,056 The Company has purchased loans, for which there was, at acquisition, evidence of more than insignificant deterioration of credit quality since origination. The carrying amount of those loans is as follows: ($ in thousands) At July 21, 2021 Par value of acquired loans $ 180,440 Allowance for credit losses (7,006) Non-credit discount (6,428) Purchase price of acquired loans $ 167,006
enterprise value lending portfolio niche segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses, Qualitative Adjustment		$ 8,600
Non-Covered Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
CECL adoption	$ 28,387
Financing Receivable, Credit Loss, Expense (Reversal)	1,680	13,000	63,400	$ 6,700
financing receivable, allowance for credit loss, threshold of loans written off	100
Financing Receivable, Allowance for Credit Loss	$ 69,995	145,041	136,671	$ 42,567	$ 42,295
Non-Covered Loans | Cumulative Effect, Period of Adoption, Adjustment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Loss		17,500
Non-Covered Loans | enterprise value lending portfolio niche segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Loss		18,200	$ 19,000
Unadvanced Commitment on Impaired Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Estimated losses attributable to unadvanced commitments on impaired loans		$ 7,600

Portfolio Loans - Summary of Re

Portfolio Loans - Summary of Recorded Investment in Impaired Portfolio Loans by Category (Details) - Non-Covered Loans - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Non-accrual	$ 23,449	$ 34,818
Restructured, accruing	2,859	3,559
Loans over 90 days past due and still accruing interest	1,716	130
Total Recorded Investment	28,024	38,507
Recorded Investment With No Allowance	9,751	18,246
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Non-accrual	17,052	18,158
Restructured, accruing	2,783	3,482
Loans over 90 days past due and still accruing interest	1,703	130
Total Recorded Investment	21,538	21,770
Recorded Investment With No Allowance	5,685	8,316
Commercial - investor owned
Financing Receivable, Past Due [Line Items]
Non-accrual	1,575	9,579
Restructured, accruing	0	0
Loans over 90 days past due and still accruing interest	0	0
Total Recorded Investment	1,575	9,579
Recorded Investment With No Allowance	168	716
CRE - owner occupied
Financing Receivable, Past Due [Line Items]
Non-accrual	2,839	2,940
Restructured, accruing	0	0
Loans over 90 days past due and still accruing interest	0	0
Total Recorded Investment	2,839	2,940
Recorded Investment With No Allowance	2,550	6,024
Residential real estate
Financing Receivable, Past Due [Line Items]
Non-accrual	1,971	4,112
Restructured, accruing	76	77
Loans over 90 days past due and still accruing interest	1	0
Total Recorded Investment	2,048	4,189
Recorded Investment With No Allowance	1,348	0
Other
Financing Receivable, Past Due [Line Items]
Non-accrual	12	29
Restructured, accruing	0	0
Loans over 90 days past due and still accruing interest	12	0
Total Recorded Investment	24	29
Recorded Investment With No Allowance	$ 0	$ 3,190

Portfolio Loans - Summary of _2

Portfolio Loans - Summary of Recorded Investment by Category for Portfolio Loans Restructured (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)loan	Dec. 31, 2020USD ($)loan
Commercial Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	$ 7,247	$ 20,835
Residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	3,489	4,135
Blanket Lien
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	9,312	394
Other Collateral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual		17
Commercial and industrial | Commercial Real Estate | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	4,271	8,316
Commercial and industrial | Residential | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	209	0
Commercial and industrial | Blanket Lien | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	9,312	394
Commercial and industrial | Other Collateral | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual		0
Commercial - investor owned | Commercial Real Estate | Commercial Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	169	9,579
Commercial - investor owned | Residential | Commercial Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	1,200	0
Commercial - investor owned | Blanket Lien | Commercial Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	0	0
Commercial - investor owned | Other Collateral | Commercial Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual		0
CRE - owner occupied | Commercial Real Estate | Commercial Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	2,807	2,940
CRE - owner occupied | Residential | Commercial Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	32	0
CRE - owner occupied | Blanket Lien | Commercial Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	0	0
CRE - owner occupied | Other Collateral | Commercial Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual		0
Residential real estate | Commercial Real Estate | Residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	0	0
Residential real estate | Residential | Residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	2,048	4,135
Residential real estate | Blanket Lien | Residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	0	0
Residential real estate | Other Collateral | Residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual		0
Other | Commercial Real Estate | Unallocated Financing Receivables
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual		0
Other | Residential | Unallocated Financing Receivables
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual		0
Other | Blanket Lien | Unallocated Financing Receivables
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual		0
Other | Other Collateral | Unallocated Financing Receivables
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual		17
Non-Covered Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	$ 23,449	$ 34,818
Number of Loans | loan	1	6
Pre-Modification Outstanding Recorded Balance	$ 221	$ 7,819
Post-Modification Outstanding Recorded Balance	221	7,819
Non-Covered Loans | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	$ 17,052	$ 18,158
Number of Loans | loan	0	3
Pre-Modification Outstanding Recorded Balance	$ 0	$ 7,447
Post-Modification Outstanding Recorded Balance	0	7,447
Non-Covered Loans | Commercial - investor owned
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	1,575	9,579
Non-Covered Loans | CRE - owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	2,839	2,940
Non-Covered Loans | Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	$ 1,971	$ 4,112
Number of Loans | loan	1	3
Pre-Modification Outstanding Recorded Balance	$ 221	$ 372
Post-Modification Outstanding Recorded Balance	221	372
Non-Covered Loans | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual	$ 12	$ 29

Portfolio Loans - Summary of _3

Portfolio Loans - Summary of Recorded Investment by Category for Portfolio Loans Restructured and Subsequently Defaulted (Details) - Non-Covered Loans - Residential $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)loan
Schedule of Financing Receivables, Troubled Debt Restructurings - Suibsequent Defaults [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | loan	1
Recorded Balance | $	$ 148

Portfolio Loans - Summary of Ag

Portfolio Loans - Summary of Aging of Recorded Investment in Past Due Portfolio Loans by Portfolio Class and Category (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 9,017,642	$ 7,224,935
Non-Covered Loans
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	9,026,780	7,241,074
Financing Receivable, Covered, after Allowance for Credit Loss	9,017,642	7,224,935
Non-Covered Loans | Financial Asset, 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	41,639	13,529
Non-Covered Loans | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	15,763	29,044
Non-Covered Loans | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	57,402	42,573
Non-Covered Loans | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	8,960,240	7,182,362
Non-Covered Loans | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	3,396,590	3,100,299
Financing Receivable, Covered, after Allowance for Credit Loss	3,392,375	3,088,995
Non-Covered Loans | Commercial and industrial | Financial Asset, 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	24,447	8,652
Non-Covered Loans | Commercial and industrial | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	14,158	12,928
Non-Covered Loans | Commercial and industrial | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	38,605	21,580
Non-Covered Loans | Commercial and industrial | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	3,353,770	3,067,415
Non-Covered Loans | Commercial - investor owned
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	2,141,143	1,589,419
Financing Receivable, Covered, after Allowance for Credit Loss	2,141,143	1,589,419
Non-Covered Loans | Commercial - investor owned | Financial Asset, 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	3,880	734
Non-Covered Loans | Commercial - investor owned | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	9,301
Non-Covered Loans | Commercial - investor owned | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	3,880	10,035
Non-Covered Loans | Commercial - investor owned | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	2,137,263	1,579,384
Non-Covered Loans | CRE - owner occupied
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	2,035,785	1,498,408
Financing Receivable, Covered, after Allowance for Credit Loss	2,035,785	1,498,408
Non-Covered Loans | CRE - owner occupied | Financial Asset, 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	10,070	328
Non-Covered Loans | CRE - owner occupied | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	289	4,647
Non-Covered Loans | CRE - owner occupied | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	10,359	4,975
Non-Covered Loans | CRE - owner occupied | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	2,025,426	1,493,433
Non-Covered Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	734,073	546,686
Financing Receivable, Covered, after Allowance for Credit Loss	734,073	546,686
Non-Covered Loans | Construction and land development | Financial Asset, 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	24	13
Non-Covered Loans | Construction and land development | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Non-Covered Loans | Construction and land development | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	24	13
Non-Covered Loans | Construction and land development | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	734,049	546,673
Non-Covered Loans | Residential real estate
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	454,052	319,179
Financing Receivable, Covered, after Allowance for Credit Loss	454,052	319,179
Non-Covered Loans | Residential real estate | Financial Asset, 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	3,181	2,071
Non-Covered Loans | Residential real estate | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	1,305	2,118
Non-Covered Loans | Residential real estate | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	4,486	4,189
Non-Covered Loans | Residential real estate | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	449,566	314,990
Non-Covered Loans | Other
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	265,137	187,083
Financing Receivable, Covered, after Allowance for Credit Loss	260,214	182,248
Non-Covered Loans | Other | Financial Asset, 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	37	1,731
Non-Covered Loans | Other | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	11	50
Non-Covered Loans | Other | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	48	1,781
Non-Covered Loans | Other | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 260,166	$ 180,467

Portfolio Loans - Summary of Te

Portfolio Loans - Summary of Term Loans by Origination Year (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 9,017,642	$ 7,224,935
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	1,230,523	1,453,800
Year 2	498,406	479,317
Year 3	331,113	274,958
Year 4	144,420	144,305
Year 5	131,943	49,160
Prior	94,638	59,505
Financing Receivable, Converted	16,472	15,399
Revolving Loans	918,693	610,050
Total	3,366,208	3,086,494
Commercial and industrial | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	1,180,601	1,402,276
Year 2	477,374	454,729
Year 3	317,869	262,258
Year 4	132,851	132,832
Year 5	116,738	25,057
Prior	82,846	58,315
Financing Receivable, Converted	11,648	14,118
Revolving Loans	854,102	527,170
Total	3,174,029	2,876,755
Commercial and industrial | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	35,005	44,922
Year 2	17,502	15,369
Year 3	9,404	9,585
Year 4	9,880	7,509
Year 5	12,217	19,613
Prior	10,979	110
Financing Receivable, Converted	4,037	0
Revolving Loans	53,595	60,448
Total	152,619	157,556
Commercial and industrial | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	14,917	6,602
Year 2	3,530	9,219
Year 3	3,840	3,115
Year 4	1,689	3,964
Year 5	2,988	4,490
Prior	813	1,080
Financing Receivable, Converted	787	1,281
Revolving Loans	10,996	22,432
Total	39,560	52,183
Commercial Real Estate-Investor Owned Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	669,987	514,175
Year 2	515,989	363,843
Year 3	379,835	204,677
Year 4	147,927	137,548
Year 5	113,704	149,180
Prior	239,427	181,429
Financing Receivable, Converted	3,925	6,509
Revolving Loans	70,348	32,058
Total	2,141,142	1,589,419
Commercial Real Estate-Investor Owned Portfolio Segment [Member] | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	651,740	481,867
Year 2	476,946	338,843
Year 3	346,245	189,305
Year 4	146,107	131,718
Year 5	112,043	138,288
Prior	217,808	161,439
Financing Receivable, Converted	3,625	6,509
Revolving Loans	68,236	32,058
Total	2,022,750	1,480,027
Commercial Real Estate-Investor Owned Portfolio Segment [Member] | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	16,871	32,308
Year 2	35,908	19,722
Year 3	32,755	6,656
Year 4	1,003	0
Year 5	502	9,647
Prior	17,478	17,370
Financing Receivable, Converted	300	0
Revolving Loans	2,062	0
Total	106,879	85,703
Commercial Real Estate-Investor Owned Portfolio Segment [Member] | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	1,376	0
Year 2	3,135	5,278
Year 3	835	8,716
Year 4	817	5,830
Year 5	1,159	1,245
Prior	4,141	2,620
Financing Receivable, Converted	0	0
Revolving Loans	50	0
Total	11,513	23,689
Commercial Real Estate-Owner Occupied Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	619,848	435,219
Year 2	437,404	299,685
Year 3	292,312	224,116
Year 4	198,000	191,720
Year 5	157,221	110,117
Prior	258,696	186,776
Financing Receivable, Converted	250	4,448
Revolving Loans	48,649	46,327
Total	2,012,380	1,498,408
Commercial Real Estate-Owner Occupied Portfolio Segment [Member] | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	604,975	419,142
Year 2	423,263	287,001
Year 3	278,830	215,181
Year 4	164,210	179,382
Year 5	140,515	104,470
Prior	235,973	167,456
Financing Receivable, Converted	250	2,672
Revolving Loans	48,349	45,323
Total	1,896,365	1,420,627
Commercial Real Estate-Owner Occupied Portfolio Segment [Member] | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	12,825	13,657
Year 2	13,585	5,257
Year 3	4,301	3,113
Year 4	16,774	6,198
Year 5	10,274	4,338
Prior	15,764	8,460
Financing Receivable, Converted	0	1,776
Revolving Loans	300	941
Total	73,823	43,740
Commercial Real Estate-Owner Occupied Portfolio Segment [Member] | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,048	2,420
Year 2	556	7,427
Year 3	9,181	5,822
Year 4	17,016	6,140
Year 5	6,432	1,309
Prior	6,959	10,860
Financing Receivable, Converted	0	0
Revolving Loans	0	63
Total	42,192	34,041
Construction Real Estate Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	339,087	225,669
Year 2	244,744	158,570
Year 3	70,978	80,142
Year 4	37,554	30,212
Year 5	25,928	11,539
Prior	9,532	11,674
Financing Receivable, Converted	568	0
Revolving Loans	2,992	28,880
Total	731,383	546,686
Construction Real Estate Portfolio Segment [Member] | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	310,140	223,069
Year 2	229,396	156,360
Year 3	70,531	45,460
Year 4	35,936	18,579
Year 5	14,860	11,539
Prior	7,180	9,144
Financing Receivable, Converted	568	0
Revolving Loans	2,992	28,880
Total	671,603	493,031
Construction Real Estate Portfolio Segment [Member] | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	28,947	2,544
Year 2	15,348	86
Year 3	60	34,179
Year 4	1,199	11,632
Year 5	11,068	0
Prior	2,330	2,499
Financing Receivable, Converted	0	0
Revolving Loans	0	0
Total	58,952	50,940
Construction Real Estate Portfolio Segment [Member] | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	0	56
Year 2	0	2,124
Year 3	387	503
Year 4	419	1
Year 5	0	0
Prior	22	31
Financing Receivable, Converted	0	0
Revolving Loans	0	0
Total	828	2,715
Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	119,191	57,840
Year 2	66,652	29,480
Year 3	22,532	18,365
Year 4	15,998	17,152
Year 5	25,038	28,855
Prior	107,169	97,441
Financing Receivable, Converted	9,980	1,459
Revolving Loans	87,225	67,666
Total	453,785	318,258
Residential | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	116,352	57,059
Year 2	66,481	27,907
Year 3	21,356	17,718
Year 4	14,841	17,138
Year 5	24,778	27,443
Prior	103,840	92,657
Financing Receivable, Converted	9,980	1,172
Revolving Loans	87,146	66,902
Total	444,774	307,996
Residential | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,425	210
Year 2	2	840
Year 3	622	526
Year 4	1,157	0
Year 5	248	514
Prior	1,305	1,603
Financing Receivable, Converted	0	287
Revolving Loans	79	511
Total	5,838	4,491
Residential | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	414	571
Year 2	169	733
Year 3	554	121
Year 4	0	14
Year 5	12	898
Prior	2,024	3,181
Financing Receivable, Converted	0	0
Revolving Loans	0	253
Total	3,173	5,771
Other
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	108,209	43,526
Year 2	68,806	28,214
Year 3	22,694	30,101
Year 4	23,159	9,659
Year 5	6,924	5,641
Prior	16,288	19,681
Financing Receivable, Converted	1,500	8
Revolving Loans	9,169	40,784
Total	256,749	177,614
Other | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	108,209	43,526
Year 2	68,806	28,195
Year 3	22,684	30,074
Year 4	23,145	9,646
Year 5	6,924	5,641
Prior	13,832	17,027
Financing Receivable, Converted	1,500	0
Revolving Loans	9,166	40,779
Total	254,266	174,888
Other | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	0	0
Year 2	0	1
Year 3	0	8
Year 4	4	0
Year 5	0	0
Prior	2,440	2,637
Financing Receivable, Converted	0	0
Revolving Loans	1	1
Total	2,445	2,647
Other | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	0	0
Year 2	0	18
Year 3	10	19
Year 4	10	13
Year 5	0	0
Prior	16	17
Financing Receivable, Converted	0	8
Revolving Loans	2	4
Total	38	79
Loans Classified By Risk Category
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	3,086,845	2,730,229
Year 2	1,832,001	1,359,109
Year 3	1,119,464	832,359
Year 4	567,058	530,596
Year 5	460,758	354,492
Prior	725,750	556,506
Financing Receivable, Converted	32,695	27,823
Revolving Loans	1,137,076	825,765
Total	8,961,647	7,216,879
Loans Classified by Performing Status
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 55,995	$ 8,056

Portfolio Loans - Credit Qualit

Portfolio Loans - Credit Quality Based on Aging Status (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 9,017,642	$ 7,224,935
Financing Receivable, after Allowance for Credit Loss	55,995	8,056
Non-Covered Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	9,026,780	7,241,074
Non-Covered Loans | Commercial - investor owned
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	2,141,143	1,589,419
Non-Covered Loans | Commercial - investor owned | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	1
Non-Covered Loans | Commercial - investor owned | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	0
Non-Covered Loans | Commercial - investor owned | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	1
Non-Covered Loans | Commercial - owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	2,035,785	1,498,408
Non-Covered Loans | Commercial - owner occupied | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	23,405
Non-Covered Loans | Commercial - owner occupied | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	0
Non-Covered Loans | Commercial - owner occupied | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	23,405
Non-Covered Loans | Construction and land development
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	734,073	546,686
Non-Covered Loans | Construction and land development | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	2,690
Non-Covered Loans | Construction and land development | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	0
Non-Covered Loans | Construction and land development | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	2,690
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	3,366,208	3,086,494
Financing Receivable, after Allowance for Credit Loss	26,167	2,502
Commercial and industrial | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	3,174,029	2,876,755
Commercial and industrial | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	152,619	157,556
Commercial and industrial | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	39,560	52,183
Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	453,785	318,258
Financing Receivable, after Allowance for Credit Loss	267	921
Residential | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	444,774	307,996
Residential | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	5,838	4,491
Residential | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	3,173	5,771
Other
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	256,749	177,614
Financing Receivable, after Allowance for Credit Loss	3,465	4,633
Other | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	254,266	174,888
Other | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	2,445	2,647
Other | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	38	79
Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, after Allowance for Credit Loss	55,982	8,035
Performing | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, after Allowance for Credit Loss	26,166	2,502
Performing | Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, after Allowance for Credit Loss	267	921
Performing | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, after Allowance for Credit Loss	3,453	4,612
Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, after Allowance for Credit Loss	13	21
Non Performing | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, after Allowance for Credit Loss	1	0
Non Performing | Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, after Allowance for Credit Loss	0	0
Non Performing | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, after Allowance for Credit Loss	$ 12	$ 21

Portfolio Loans - Acquired PCD

Portfolio Loans - Acquired PCD Loans (Details) $ in Thousands	Nov. 12, 2020USD ($)
Receivables [Abstract]
par value, acquired loans	$ 180,440
allowance pcd loans	(7,006)
noncredit premium	(6,428)
purchase price, acquired loans	$ 167,006

Leases (Details)

Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 5,191
Operating Lease, Right-of-Use Asset	13,483	$ 13,636
Operating Lease, Cost	4,877	3,207
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	5,658	1,623	$ 5,208
Short-term Lease, Cost	833	201
Lease, Cost	5,710	3,408
Operating Lease, Liability	$ 14,865	$ 14,152
Operating Lease, Weighted Average Remaining Lease Term	4 years	5 years
Operating Lease, Weighted Average Discount Rate, Percent	2.00%	2.50%
Lessee, Operating Lease, Liability, Payments, Due Year Two	$ 3,688
Lessee, Operating Lease, Liability, Payments, Due Year Three	2,670
Lessee, Operating Lease, Liability, Payments, Due Year Four	1,326
Lessee, Operating Lease, Liability, Payments, Due Year Five	1,138
Lessee, Operating Lease, Liability, Payments, Due after Year Five	1,566
Lessee, Operating Lease, Liability, Payments, Due	15,579
Present Value Adjustment	714
Operating Lease, Lease Income, Lease Payments	1,900	$ 1,800
Operating Lease, Payments	$ 5,200	$ 3,300
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Operating Lease, Impairment Loss	$ 1,100
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Renewal Term	5 years

Derivative Financial Instrume_3

Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2020
Derivative [Line Items]
Derivative, Net Liability Position, Aggregate Fair Value	$ 16,600
Derivative Liability, Notional Amount	0
Summary of Derivative Instruments [Abstract]
Securities Sold under Agreements to Repurchase, Gross	331,006		$ 271,081
Securities Sold under Agreements to Repurchase, Asset	0		0
Securities sold under agreement to repurchase	331,006		271,081
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities	0		0
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Cash	331,006		271,081
Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral	0		0
Collateral Already Posted, Aggregate Fair Value	14,000
swap termination fee	3,200
repayment of fhlb advances	200,000
interest rate swaps terminated	200,000
Interest rate swap contracts
Derivative [Line Items]
Pledged cash as collateral in connection with interest rate swap agreements	14,031		34,903
Summary of Derivative Instruments [Abstract]
Derivative Asset, Fair Value, Gross Asset	12,869		28,703
Liability derivatives (other liabilities), fair value	15,794		34,967
Derivative Asset, Fair Value, Gross Liability	0		0
Derivative financial instruments	12,869		28,703
Derivative, Collateral, Obligation to Return Securities	1,033		2
Derivative, Collateral, Obligation to Return Cash	0		0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	11,836		28,701
Derivative Liability, Fair Value, Gross Asset	0		0
Derivative financial instruments	15,794		34,967
Derivative, Collateral, Right to Reclaim Securities	1,033		2
Derivative Liability, Fair Value, Amount Offset Against Collateral	730		62
Designated as Hedging Instrument [Member] | Other Assets | Interest Rate Contract [Member]
Derivative [Line Items]
Notional	61,962		61,962
Summary of Derivative Instruments [Abstract]
Derivative Asset, Fair Value, Gross Asset	0		0
Designated as Hedging Instrument [Member] | Other Liabilities | Interest Rate Contract [Member]
Summary of Derivative Instruments [Abstract]
Liability derivatives (other liabilities), fair value	2,911		5,987
Non-designated hedging instruments | Other Assets | Interest Rate Contract [Member]
Derivative [Line Items]
Notional	918,698		1,026,016
Summary of Derivative Instruments [Abstract]
Derivative Asset, Fair Value, Gross Asset	12,869		28,703
Non-designated hedging instruments | Other Liabilities | Interest Rate Contract [Member]
Summary of Derivative Instruments [Abstract]
Liability derivatives (other liabilities), fair value	12,883		$ 28,980
Cash Flow Hedging | Subordinated debentures and notes
Derivative [Line Items]
Notional	$ 62,000
Derivative, Variable Interest Rate	2.62%
Cash Flow Hedging | Forecast [Member]
Summary of Derivative Instruments [Abstract]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		$ 1,300

Derivative Financial Instrume_4

Derivative Financial Instruments - Cash Flow Hedges (Details) - Cash Flow Hedging $ in Thousands	Dec. 31, 2021USD ($)
Cash Flow Hedge Due March 15, 2024
Derivative [Line Items]
Notional	$ 15,465
Fixed Rate	2.60%
Cash Flow Hedge Due March 30, 2024
Derivative [Line Items]
Notional	$ 14,433
Fixed Rate	2.60%
Cash Flow Hedge Due March 15, 2026
Derivative [Line Items]
Notional	$ 18,558
Fixed Rate	2.64%
Cash Flow Hedge Due March 17, 2026
Derivative [Line Items]
Notional	$ 13,506
Fixed Rate	2.64%

Fixed Assets - Summary of Fixed

Fixed Assets - Summary of Fixed Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Land	$ 12,849	$ 13,389
Buildings and leasehold improvements	52,012	53,007
Furniture, fixtures and equipment	18,821	17,933
Fixed assets, gross	83,682	84,329
Less accumulated depreciation and amortization	35,767	31,160
Fixed assets, net	$ 47,915	$ 53,169

Fixed Assets - Narrative (Detai

Fixed Assets - Narrative (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2021USD ($)branch	Dec. 31, 2021USD ($)branch	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Property, Plant and Equipment [Line Items]
Depreciation and amortization		$ 6,100	$ 6,200	$ 5,700
Asset impairment		$ 3,441	$ 0	$ 0
CALIFORNIA
Property, Plant and Equipment [Line Items]
Number Of Branches Closed | branch	3	3
Asset impairment	$ 400
St. Louis
Property, Plant and Equipment [Line Items]
Number Of Branches Closed | branch	2	2
Asset impairment	$ 3,400

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 260,567	$ 260,567	$ 210,344
Amortization of intangible assets		5,690	5,673	$ 5,543
Finite-Lived Intangible Assets [Line Items]
Core deposit intangible, net, end of year		22,286
Goodwill		365,164	260,567	210,344
Goodwill Acquired Through Acquisition		$ 104,597	50,223
Core Deposits [Member]
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-lived intangible assets useful life	10 years	10 years
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Residual Value		$ 4,892	2,681
Amortization		(5,690)	(5,673)
Core deposit intangible, net, end of year		$ 22,286	$ 23,084	$ 26,076

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Expected Amortization Schedule for the Core Deposit Intangible (Details) $ in Thousands	Dec. 31, 2021USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2021	$ 5,367
2022	4,601
2023	3,834
2024	3,068
2025	2,301
After 2026	3,115
Core deposit intangible, net, end of year	$ 22,286

Deposits (Details)

Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Brokered
Less than 1 year	$ 10,062
Greater than 1 year and less than 2 years	61,173
Greater than 2 years and less than 3 years	37,847
Greater than 3 years and less than 4 years	19,888
Greater than 4 years and less than 5 years	0
Greater than 5 years	0
Brokered	128,970	$ 50,209
Customer
Less than 1 year	365,902
Greater than 1 year and less than 2 years	67,859
Greater than 2 years and less than 3 years	21,010
Greater than 3 years and less than 4 years	14,238
Greater than 4 years and less than 5 years	5,564
Greater than 5 years	4,750
Other	479,323	499,886
Total
Less than 1 year	375,964
Greater than 1 year and less than 2 years	129,032
Greater than 2 years and less than 3 years	58,857
Greater than 3 years and less than 4 years	34,126
Greater than 4 years and less than 5 years	5,564
Greater than 5 years	4,750
Total Time Deposits	608,293
Time Deposits, $250,000 or More	93,700
CDARS Deposits	22,000
ICS Deposits	118,200
Deposit Liabilities Reclassified as Loans Receivable	$ 1,300	$ 1,000

Subordinated Debentures (Detail

Subordinated Debentures (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)shares	Dec. 31, 2020USD ($)shares	Dec. 31, 2019shares	Nov. 01, 2016USD ($)
Subordinated Borrowing [Line Items]
Number of Unconsolidated Statutory Business Trusts	13
Investments trust preferred securities	$ 2,900
Subordinated debentures and notes	$ 154,899	$ 203,637
Conversion of subordinated debt into common stock (in shares) | shares	0	0	0
5.75%
Subordinated Borrowing [Line Items]
Fixed interest rate	5.75%
Senior Subordinated Notes [Member]
Subordinated Borrowing [Line Items]
Senior Subordinated Notes				$ 50,000
Trust preferred securities [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 92,553	$ 92,290
Trust preferred securities [Member] | EFSC Clayco Statutory Trust I
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 3,196	3,196
Maturity Date	Dec. 17, 2033
Initial Call Date (1)	Dec. 17, 2008
Description of variable rate	3 Month LIBOR
Floating interest rate	0.0285
Trust preferred securities [Member] | EFSC Capital Trust II
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 5,155	5,155
Maturity Date	Jun. 17, 2034
Initial Call Date (1)	Jun. 17, 2009
Description of variable rate	3 Month LIBOR
Floating interest rate	0.0265
Trust preferred securities [Member] | EFSC Statutory Trust III
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 11,341	11,341
Maturity Date	Dec. 15, 2034
Initial Call Date (1)	Dec. 15, 2009
Description of variable rate	3 Month LIBOR
Floating interest rate	0.0197
Trust preferred securities [Member] | EFSC Clayco Statutory Trust II
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 4,124	4,124
Maturity Date	Sep. 15, 2035
Initial Call Date (1)	Sep. 15, 2010
Description of variable rate	3 Month LIBOR
Floating interest rate	0.0183
Trust preferred securities [Member] | EFSC Statutory Trust IV
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 10,310	10,310
Maturity Date	Dec. 15, 2035
Initial Call Date (1)	Dec. 15, 2010
Description of variable rate	3 Month LIBOR
Floating interest rate	0.0144
Trust preferred securities [Member] | EFSC Statutory Trust V
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 4,124	4,124
Maturity Date	Sep. 15, 2036
Initial Call Date (1)	Sep. 15, 2011
Description of variable rate	3 Month LIBOR
Floating interest rate	0.0160
Trust preferred securities [Member] | EFSC Capital Trust VI
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 14,433	14,433
Maturity Date	Mar. 30, 2037
Initial Call Date (1)	Mar. 30, 2012
Description of variable rate	3 Month LIBOR
Floating interest rate	0.0160
Trust preferred securities [Member] | EFSC Capital Trust VII
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 4,124	4,124
Maturity Date	Dec. 15, 2037
Initial Call Date (1)	Dec. 15, 2012
Description of variable rate	3 Month LIBOR
Floating interest rate	0.0225
Trust preferred securities [Member] | JEFFCO Stat Trust I [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 7,732	7,752
Maturity Date	Feb. 22, 2031
Initial Call Date (1)	Feb. 22, 2011
Fixed interest rate	10.20%
Trust preferred securities [Member] | EFSC Capital Trust VIII
Subordinated Borrowing [Line Items]
Fixed interest rate	9.00%
Trust preferred securities [Member] | JEFFCO Stat Trust II [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 4,496	4,443
Maturity Date	Mar. 17, 2034
Initial Call Date (1)	Mar. 17, 2009
Description of variable rate	3 Month LIBOR
Fixed interest rate	2.75%
Trust preferred securities [Member] | Trinity Capital Trust III [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 5,339	5,272
Maturity Date	Sep. 8, 2034
Initial Call Date (1)	Sep. 8, 2009
Description of variable rate	3 Month LIBOR
Fixed interest rate	2.70%
Trust preferred securities [Member] | Trinity Capital Trust IV [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 10,310	10,310
Maturity Date	Nov. 23, 2035
Initial Call Date (1)	Aug. 23, 2010
Fixed interest rate	6.88%
Trust preferred securities [Member] | Trinity Capital Trust V [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 7,869	7,706
Maturity Date	Dec. 15, 2036
Initial Call Date (1)	Sep. 15, 2011
Description of variable rate	3 Month LIBOR
Fixed interest rate	1.65%
Senior Subordinated Notes [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 0	50,000
Debt issuance costs	(904)	(1,903)
Subordinated notes, net of issuance costs	$ 62,346	111,347
Maturity Date	Nov. 1, 2026
Initial Call Date (1)	Nov. 1, 2021
Floating interest rate	0.03387
Fixed interest rate	4.75%
Senior Subordinated Notes [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Subordinated Borrowing [Line Items]
Floating interest rate	0.0566
Senior Subordinated Notes [Member] | 5.75%
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 63,250	$ 63,250
Maturity Date	Jun. 1, 2030
Initial Call Date (1)	Jun. 1, 2025

Federal Home Loan Bank Advanc_3

Federal Home Loan Bank Advances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2021
Federal Home Loan Bank, Advances, Branch of FHLB [Line Items]
Convertible Debt	$ 50,000
Convertible advances weighted average interest rate	1.56%
Collateral used to secure confirming letters of credit		$ 60,000
Weighted Rate
Federal Home Loan Bank, Advances, Maturities Summary, One to Five Years	$ 50,000	$ 50,000
Federal Home Loan Bank Advances, Maturities Summary, Average Interest Rate of Amounts Due in One to Five Years of Balance Sheet Date	1.56%	1.56%
Des Moines
Federal Home Loan Bank, Advances, Branch of FHLB [Line Items]
Carrying value of the loans pledged		$ 1,400,000
Availability under the secured line of credit		$ 708,600

Other Borrowings and Notes Pa_3

Other Borrowings and Notes Payable (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Feb. 23, 2016
Debt Instrument [Line Items]
Loans Payable	$ 22,857,000	$ 30,000,000
Line of Credit, Current			$ 25,000,000
Securities sold under agreement to repurchase	331,006,000	271,081,000
Total	353,863,000	301,081,000
Unsecured term loan, face amount	40,000,000
paycheck protection program liquidity facility funds	86,100,000
Other Borrowings
Debt Instrument [Line Items]
Maximum balance outstanding at any month-end	331,006,000	271,081,000
Average balance during the year	$ 225,895,000	$ 206,338,000
Average interest rate during the year	0.10%	0.23%
Average interest rate at December 31	0.06%	0.07%
Line of Credit
Debt Instrument [Line Items]
Remaining borrowing capacity	$ 1,100,000,000
Aggregate of pledge secured by certain eligible loans	1,300,000,000
Amount withdrawn	0
Unsecured Term Loan
Debt Instrument [Line Items]
Maximum balance outstanding at any month-end	28,571,000	$ 34,286,000
Average balance during the year	$ 26,427,000	$ 32,123,000
Average interest rate during the year	1.40%	1.96%
Average interest rate at December 31	1.38%	1.44%

Regulatory Matters (Details)

Regulatory Matters (Details)	Dec. 31, 2021	Dec. 31, 2020
Enterprise Financial Services Corp [Member]
Regulatory Assets [Line Items]
Tier One Common Equity Capital to Risk Weighted Assets	11.30%	10.90%
Actual, Ratio	0.130	0.121
Actual, Ratio	0.147	0.149
Actual, Ratio	0.097	0.100
Enterprise Bank and Trust [Member]
Regulatory Assets [Line Items]
Tier One Common Equity Capital to Risk Weighted Assets	12.50%	12.50%
Tier One Common Equity Capital Required to be Well Capitalized to Risk Weighted Assets	6.50%
Tier One Common Equity Capital CCB Minimum	7.00%
Actual, Ratio	0.125	0.125
To Be Well Capitalized Under Applicable Action Provisions, Ratio	0.080
Tier One Risk Based Capital CCB Minimum	8.50%
Actual, Ratio	0.135	0.137
To Be Well Capitalized Under Applicable Action Provisions, Ratio	0.100
Capital to Risk Weighted Assets CCB Minimum	10.50%
Actual, Ratio	0.093	0.103
To Be Well Capitalized Under Applicable Action Provisions, Ratio	0.050
Tier One Leverage Capital to Average Assets CCB Minimum	4.00%

Compensation Plans - Narrative

Compensation Plans - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	May 01, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	700,473	700,473			2,000,000
Share-based compensation expense		$ 6,017	$ 4,178	$ 4,032
Tax benefit from compensation expense		$ (100)	200	500
Award vesting period		3 years
Total unrecognized compensation cost for nonvested stock units	$ 8,200	$ 8,200
Employee minimum age to participate in plan		21 years
Company contributions, amount charged to expense		$ 4,900	$ 3,800	3,200
Preferred stock, shares authorized	5,000,000	5,000,000	5,000,000
Preferred stock, par value	$ 0.01	$ 0.01	$ 0.01
Preferred stock, shares outstanding	75,000	75,000	0
Expected years to recognize unearned compensation		2 years
Proceeds from issuance of preferred stock, net	$ 72,000	$ 71,988	$ 0	0
Depositary Shares, Issued And Sold	3,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value		900	2,800	4,600
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense		$ 396	0	0
Contractual term		10 years
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense		$ 3,109	2,613	1,969
Total unrecognized compensation cost for nonvested stock units	$ 4,622	$ 4,622	$ 3,899	$ 3,417
Number of shares issued		100,220
Expected years to recognize unearned compensation		1 year 10 months 24 days	1 year 10 months 24 days	1 year 10 months 24 days
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense		$ 1,777	$ 1,097	$ 1,699
Number of shares issued		84,628
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent		85.00%
Share-based compensation expense		$ 735	$ 468	$ 364
Number of shares authorized	750,000	750,000
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period		64,826	58,195	41,116
Minimum | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		3 years
Minimum | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		2 years
Maximum | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		5 years
Maximum | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		5 years
Stock Plan for Non-Management Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant	73,618	73,618	86,616
Number of shares authorized	200,000	200,000
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant, Excluding Deferred Shares	59,760	59,760
Share Based Compensation Arrangement by Shar Based Payment Award Number of Shares Available for Grant, Deferred Shares	13,858	13,858
Deferred Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate	25.00%	25.00%
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate, Bonus		100.00%
Deferred Compensation Liability, Current and Noncurrent	$ 5,000	$ 5,000

Compensation Plans - Common Sto

Compensation Plans - Common Stock (Details) - shares	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance	1,778,836	1,344,801
2018 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance	670,326	339,691
Stock Plan for Non-Management Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant	73,618	86,616
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance	571,064	635,890
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	169,244	125,176
Common Stock, Capital Shares Reserved for Future Issuance	169,244	125,176
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	181,657	157,428
Stock Options and SSARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement By Share-based Payment Award, Outstanding, Number	112,927	0

Compensation Plans - Changes in

Compensation Plans - Changes in OCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	$ 1,078,975	$ 867,185	$ 603,804
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(18,343)	19,371	27,031
Debt Securities, Held-to-maturity, Transfer, Derivative Hedge, Gain (Loss)		0	0
Balance	1,529,116	1,078,975	867,185
Accumulated other comprehensive income (loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	37,120	17,749	(9,282)
Balance	18,777	37,120	17,749
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	22,320	14,977	(9,047)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(17,049)	23,627	29,226
Debt Securities, Held-to-maturity, Transfer, Derivative Hedge, Gain (Loss)		(16,284)	(5,202)
Balance	5,271	22,320	14,977
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	(4,508)	(2,162)	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	2,330	(2,346)	(2,162)
Debt Securities, Held-to-maturity, Transfer, Derivative Hedge, Gain (Loss)		0	0
Balance	(2,178)	(4,508)	(2,162)
AOCI, Accumulated Gain (Loss), Held To Maturity Securities, Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	19,308	4,934	(235)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(3,624)	(1,910)	(33)
Debt Securities, Held-to-maturity, Transfer, Derivative Hedge, Gain (Loss)		16,284	5,202
Balance	$ 15,684	$ 19,308	$ 4,934

Compensation Plans - Components

Compensation Plans - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Other comprehensive income (loss), securities, available-for-sale, unrealized holding gain (loss) arising during period, before tax	$ (22,701)	$ 31,798	$ 38,764
Other comprehensive income (loss), securities, available-for-sale, unrealized holding gain (loss) arising during period, tax	(5,652)	7,854	9,575
Other comprehensive income (loss), securities, available-for-sale, unrealized holding gain (loss) arising during period, net of tax	(17,049)	23,944	29,189
Reclassification adjustment for realized gains on sale of securities available for sale included in net income, before tax	0	(421)	49
Reclassification adjustment for realized gains on sale of securities available for sale included in net income, tax	0	(104)	12
Reclassification adjustment for realized gains on sale of securities available for sale included in net income, net of tax	0	(317)	37
Other Comprehensive Income (Loss), Reclassification of (gain) loss on held to maturity securities, before of tax	(4,672)	(2,537)	(44)
Other Comprehensive Income (Loss), Reclassification of (gain) loss on held to maturity securities, tax	(1,048)	(627)	(11)
Other Comprehensive Income (Loss), Reclassification of (gain) loss on held to maturity securities, net of tax	(3,624)	(1,910)	(33)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	1,161	(5,947)	(2,262)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	372	(1,951)	(742)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	1,533	(7,898)	(3,004)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Cash Flow Hedges, after Tax	1,169	3,601	100
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Cash Flow Hedges, Tax	374	1,181	33
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Cash Flow Hedges, before Tax	(1,543)	(4,782)	(133)
Other comprehensive income (loss) before tax	(24,297)	25,724	35,898
Other comprehensive income (loss) tax	(5,954)	6,353	8,867
Other comprehensive income (loss)	$ (18,343)	$ 19,371	$ 27,031

Compensation Plans - Reclassifi

Compensation Plans - Reclassifications Out of AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Noninterest income	$ 67,743	$ 54,503	$ 49,176
Net interest income	360,194	270,001	238,717
Income before income tax expense	168,633	91,947	116,036
Income tax expense	35,578	17,563	23,297
Net income	$ 133,055	$ 74,384	$ 92,739

Compensation Plans - Schedule o

Compensation Plans - Schedule of Various Information (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ 6,017	$ 4,178	$ 4,032
Total unrecognized compensation cost for nonvested stock units	$ 8,200
Expected years to recognize unearned compensation	2 years
Weighted average fair value (usd per share)	$ 47,160	$ 38,090	$ 47,460
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ 735	$ 468	$ 364
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	3,109	2,613	1,969
Total fair value at vesting date	2,855	1,702	1,067
Total unrecognized compensation cost for nonvested stock units	$ 4,622	$ 3,899	$ 3,417
Expected years to recognize unearned compensation	1 year 10 months 24 days	1 year 10 months 24 days	1 year 10 months 24 days
Stock Plan for Non-Management Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued	12,998,000	15,901,000	11,382,000
Weighted average fair value (usd per share)	$ 46.05	$ 30.28	$ 41.63

Compensation Plans - Weighted-A

Compensation Plans - Weighted-Average Assumptions (Details) - Stock Options	12 Months Ended
	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk Free Interest Rate	1.06%
Expected Dividend Yield	1.65%
Expected Volatility	33.92%
Expected Term (years)	6 years 2 months 12 days

Compensation Plans - Schedule_2

Compensation Plans - Schedule of Employee Stock Options and SSARs Activity (Details)	12 Months Ended
	Dec. 31, 2021$ / sharesshares
Shares
Granted (in shares) | shares	118,604
Forfeited (in shares) | shares	(5,677)
Weighted Average Exercise Price
Granted (usd per share) | $ / shares	$ 43.80
Forfeited (usd per share) | $ / shares	43.81
Outstanding at end of period (usd per share) | $ / shares	$ 43.80
Additional Disclosures
Granted, Weighted Average Remaining Contractual Term	9 years 2 months 12 days
Stock Options and SSARs
Shares
Outstanding at beginning of period (in shares) | shares	0
Outstanding at end of period (in shares) | shares	112,927
Exercisable (in shares) | shares	460
Weighted Average Exercise Price
Outstanding at beginning of period (usd per share) | $ / shares	$ 0
Exercisable (usd per share) | $ / shares	$ 43.81
Additional Disclosures
Outstanding, weighted average remaining contractual term	9 years 2 months 12 days
Exercisable, weighted average remaining contractual term	9 years 2 months 12 days

Compensation Plans - Summary of

Compensation Plans - Summary of Restricted Stock Units Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Weighted Average Grant Date Fair Value
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 8,200
Expected years to recognize unearned compensation	2 years
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 2,855	$ 1,702	$ 1,067
Shares
Outstanding, beginning of period (in shares)	157,428
Granted (in shares)	100,220
Vested (in shares)	65,755
Forfeited (in shares)	10,236
Outstanding, end of period (in shares)	181,657	157,428
Weighted Average Grant Date Fair Value
Outstanding, beginning of period (usd per share)	$ 42.44
Granted (usd per share)	44.01
Vested (usd per share)	43.91
Forfeited (usd per share)	43.51
Outstanding, end of period (usd per share)	$ 42.71	$ 42.44
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 4,622	$ 3,899	$ 3,417
Expected years to recognize unearned compensation	1 year 10 months 24 days	1 year 10 months 24 days	1 year 10 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 44.01	$ 39.63	$ 45
Performance Shares [Member]
Shares
Outstanding, beginning of period (in shares)	125,176
Granted (in shares)	84,628
Vested (in shares)	31,452
Forfeited (in shares)	9,108
Outstanding, end of period (in shares)	169,244	125,176

Compensation Plans Outstanding

Compensation Plans Outstanding Longer Term Incentive Awards (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Target Shares Issuable as Long Term Incentive Awards	$ 40,372	$ 24,674	$ 19,576
Maximum Shares Issuable as Long Term Incentive Awards	80,744	49,348	39,152
Unrecognized Compensation Cost - Long Term Incentives	$ 1,981,000	$ 538,000	$ 27,000
Share-based Compensation Arrangement By Share-based Payment Award, Grants In Period, Weighted Average Grant Date Fair Value	$ 47,160	$ 38,090	$ 47,460

Income Taxes - Schedule of Comp

Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Federal	$ 29,835	$ 25,132	$ 15,470
State and local	5,198	5,009	2,027
Current Federal, State and Local, Tax Expense (Benefit)	35,033	30,141	17,497
Deferred:	545	(12,578)	5,800
Deferred Federal Income Tax Expense (Benefit)	870	(10,651)	4,262
Deferred State and Local Income Tax Expense (Benefit)	(325)	(1,927)	1,538
Deferred Federal, State and Local, Tax Expense (Benefit)	545	(12,578)	5,800
Total income tax expense	$ 35,578	$ 17,563	$ 23,297

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details)	12 Months Ended
	Dec. 31, 2021USD ($)state	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Tax Credit Carryforward [Line Items]
Amount recognized as a component of income tax expense related low-income housing tax credit	$ 100,000	$ 400,000	$ 300,000
Investments related to low-income housing tax credits	7,600,000	4,200,000
Impairment losses recognized from forfeiture or ineligibility	0
Deferred Tax Assets, Net	40,890,000	29,804,000
Deferred Tax Assets, Valuation Allowance	$ 2,830,000	2,932,000
Number of states the company files income tax returns in | state	30
Unrecognized tax benefits	$ 2,697,000	3,157,000	1,497,000	$ 1,301,000
Unrecognized tax benefits that would impact effective tax rate	2,500,000	3,100,000	$ 1,100,000
Reduction in unrecognized tax benefit that is reasonably possible due to a lapse of statute of limitations	$ 400,000
Duration of unrecognized tax benefits	12 months
Income Tax Examination, Penalties and Interest Accrued	$ 500,000	900,000
Other Assets
Tax Credit Carryforward [Line Items]
Deferred Tax Assets, Net	$ 40,900,000	$ 29,800,000

Income Taxes - Schedule of Inco

Income Taxes - Schedule of Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Increase (reduction) in income tax resulting from:
Income tax expense at statutory rate	$ 35,413	$ 19,309	$ 24,368
Tax-exempt interest income, net	(3,198)	(2,010)	(962)
State and local income taxes, net	4,936	3,254	2,816
Bank-owned life insurance, net	(713)	(778)	(628)
Non-deductible expenses	1,090	637	749
Tax benefit of low-income housing tax credit ("LIHTC") investments, net	(132)	(444)	(278)
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	146	(175)	(526)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount	(1,136)	(1,327)	(913)
Non-taxable donation to charitable foundation	(263)	0	(420)
Other, net	(565)	(903)	(909)
Total income tax expense	$ 35,578	$ 17,563	$ 23,297

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Allowance for loan losses	$ 36,550	$ 34,031
Deferred Tax Assets, Loans Held for Sale	6,971	8,058
Other real estate	305	896
Deferred compensation	2,704	2,585
Accrued compensation	5,881	5,391
Deferred Tax Assets, Operating Loss Carryforwards	6,061	6,460
Other deferred tax assets	5,671	3,086
Total deferred tax assets	64,143	60,507
Deferred tax liabilities:
Deferred Tax Liabilities, Asset Purchase Tax Basis Difference, Net	1,709	3,413
Unrealized gains on securities	6,171	12,189
Deferred Tax Liabilities, Goodwill and Intangible Assets	8,789	7,800
Deferred Tax Liabilities, Other	3,754	4,369
Total deferred tax liabilities	20,423	27,771
Deferred Tax Assets, Gross	43,720	32,736
Deferred Tax Assets, Valuation Allowance	2,830	2,932
Deferred Tax Assets, Net	$ 40,890	$ 29,804

Income Taxes - Schedule of Unre

Income Taxes - Schedule of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Balance at beginning of year	$ 3,157	$ 1,497	$ 1,301
Additions based on tax positions related to the current year	563	395	401
Additions for tax positions of prior years	436	1,556	62
Settlements for tax positions of prior years	(1,289)	0	0
Settlements or lapse of statute of limitations	(170)	(291)	(267)
Balance at end of year	$ 2,697	$ 3,157	$ 1,497

Commitments (Details)

Commitments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Commitments to extend credit
Schedule of Commitments [Line Items]
Off-balance sheet financial instruments, contractual amounts	$ 2,481,173	$ 1,946,068
Letters of credit
Schedule of Commitments [Line Items]
Off-balance sheet financial instruments, contractual amounts	$ 77,314	50,971
Letters of credit | Minimum
Schedule of Commitments [Line Items]
Remaining term	1 month
Letters of credit | Maximum
Schedule of Commitments [Line Items]
Remaining term	4 years
State tax credits, held for sale
Schedule of Commitments [Line Items]
Off-balance sheet financial instruments, contractual amounts	$ 18,118	24,473
SBIC Capital Commitments [Domain]
Schedule of Commitments [Line Items]
Off-balance sheet financial instruments, contractual amounts	21,553	23,400
Unadvanced Commitment on Impaired Loan
Schedule of Commitments [Line Items]
Estimated losses attributable to unadvanced commitments on impaired loans	7,600
Fixed Rate Loan Commitment | Commitments to extend credit
Schedule of Commitments [Line Items]
Off-balance sheet financial instruments, contractual amounts	$ 238,700	$ 160,600

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets
Securities available-for-sale	$ 1,366,006	$ 912,429
Obligations of U.S. Government-sponsored enterprises
Assets
Securities available-for-sale	173,511	15,161
Obligations of states and political subdivisions
Assets
Securities available-for-sale	575,084	344,232
Residential mortgage-backed securities
Assets
Securities available-for-sale	513,859	526,572
Corporate Debt Securities [Member]
Assets
Securities available-for-sale	91,170	11,466
US Treasury Bill Securities [Member]
Assets
Securities available-for-sale	12,382	14,998
Recurring basis | Total Fair Value
Assets
Securities available-for-sale	1,366,006	912,429
Other investments	3,012
Derivative financial instruments	12,869	28,703
Total assets	1,381,887	941,132
Liabilities
Derivative financial instruments	15,794	34,967
Total liabilities	15,794	34,967
Recurring basis |     Obligations of U.S. Government-sponsored enterprises | Total Fair Value
Assets
Securities available-for-sale	173,511	15,161
Recurring basis | Obligations of states and political subdivisions | Total Fair Value
Assets
Securities available-for-sale	575,084	344,232
Recurring basis | Residential mortgage-backed securities | Total Fair Value
Assets
Securities available-for-sale	513,859	526,572
Recurring basis | Corporate Debt Securities [Member] | Total Fair Value
Assets
Securities available-for-sale	12,382	14,998
Recurring basis | US Treasury Bill Securities [Member] | Total Fair Value
Assets
Securities available-for-sale	91,170	11,466
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Securities available-for-sale	0	0
Other investments	0
Derivative financial instruments	0	0
Total assets	0	0
Liabilities
Derivative financial instruments	0	0
Total liabilities	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) |     Obligations of U.S. Government-sponsored enterprises
Assets
Securities available-for-sale	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Obligations of states and political subdivisions
Assets
Securities available-for-sale	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Residential mortgage-backed securities
Assets
Securities available-for-sale	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate Debt Securities [Member]
Assets
Securities available-for-sale	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | US Treasury Bill Securities [Member]
Assets
Securities available-for-sale	0	0
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets
Securities available-for-sale	1,366,006	912,429
Other investments	3,012
Derivative financial instruments	12,869	28,703
Total assets	1,381,887	941,132
Liabilities
Derivative financial instruments	15,794	34,967
Total liabilities	15,794	34,967
Recurring basis | Significant Other Observable Inputs (Level 2) |     Obligations of U.S. Government-sponsored enterprises
Assets
Securities available-for-sale	173,511	15,161
Recurring basis | Significant Other Observable Inputs (Level 2) | Obligations of states and political subdivisions
Assets
Securities available-for-sale	575,084	344,232
Recurring basis | Significant Other Observable Inputs (Level 2) | Residential mortgage-backed securities
Assets
Securities available-for-sale	513,859	526,572
Recurring basis | Significant Other Observable Inputs (Level 2) | Corporate Debt Securities [Member]
Assets
Securities available-for-sale	12,382	14,998
Recurring basis | Significant Other Observable Inputs (Level 2) | US Treasury Bill Securities [Member]
Assets
Securities available-for-sale	91,170	11,466
Recurring basis | Significant Unobservable Inputs (Level 3)
Assets
Securities available-for-sale	0	0
Other investments	0
Derivative financial instruments	0	0
Total assets	0	0
Liabilities
Derivative financial instruments	0	0
Total liabilities	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) |     Obligations of U.S. Government-sponsored enterprises
Assets
Securities available-for-sale	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Obligations of states and political subdivisions
Assets
Securities available-for-sale	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Residential mortgage-backed securities
Assets
Securities available-for-sale	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Corporate Debt Securities [Member]
Assets
Securities available-for-sale	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | US Treasury Bill Securities [Member]
Assets
Securities available-for-sale	$ 0	$ 0

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Recurring basis | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other investments	$ 0
Estimated fair value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
State Tax Credits Held For Sale, Fair Value Disclosure	30,686	$ 39,925
Estimated fair value | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other investments	$ 3,012

Fair Value Measurements - Sum_2

Fair Value Measurements - Summary of Financial Instruments and Non-Financial Assets Measured at Fair Value on a Non-Recurring Basis (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total (losses) gains for the year	$ 3,685	$ 5,486
Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total (losses) gains for the year	3,500	4,486
Other real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total (losses) gains for the year	29	1,000
Loan Servicing Asset
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total (losses) gains for the year	156
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Loan Servicing Asset
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	3,146	0
Significant Other Observable Inputs (Level 2) | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Significant Other Observable Inputs (Level 2) | Other real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate	0	0
Significant Other Observable Inputs (Level 2) | Loan Servicing Asset
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate	3,146
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	7,038	4,847
Significant Unobservable Inputs (Level 3) | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	6,406	1,247
Significant Unobservable Inputs (Level 3) | Other real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate	632	3,600
Significant Unobservable Inputs (Level 3) | Loan Servicing Asset
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate	0
Total Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	10,184	4,847
Total Fair Value | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	6,406	1,247
Total Fair Value | Other real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate	632	$ 3,600
Total Fair Value | Loan Servicing Asset
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate	$ 3,146

Fair Value Measurements - Sum_3

Fair Value Measurements - Summary of Carrying Amount and Fair Values of Financial Instruments Reported on the Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Balance sheet assets
Securities held-to-maturity	$ 430,295	$ 488,059
Carrying Amount
Balance sheet assets
Securities held-to-maturity	429,681	487,610
Other investments	56,884	48,764
Loans held-for-sale	6,389	13,564
Loans, net	8,872,601	7,088,264
State tax credits held for sale	27,994	36,853
Servicing asset	6,714	5,721
Balance sheet liabilities
Certificates of deposit	608,293	550,095
Subordinated debentures and notes	154,899	203,637
FHLB advances	50,000	50,000
Other borrowings	353,863	301,081
Estimated fair value
Balance sheet assets
Securities held-to-maturity	434,672	501,523
Other investments	56,884	48,764
Loans held-for-sale	6,389	13,564
Loans, net	8,869,891	7,067,562
State tax credits held for sale	30,686	39,925
Servicing asset	6,714	5,721
Balance sheet liabilities
Certificates of deposit	606,177	553,946
Subordinated debentures and notes	155,972	192,889
FHLB advances	51,527	51,871
Other borrowings	$ 353,863	$ 301,081

Parent Company Only Condensed_4

Parent Company Only Condensed Financial Statements - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Cash	$ 2,021,689	$ 537,703	$ 167,256	$ 196,552
Total assets	13,537,358	9,751,571
Subordinated debentures and notes	154,899	203,637
Shareholders' equity	1,529,116	1,078,975	867,185	603,804
Total liabilities and shareholders' equity	13,537,358	9,751,571
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Cash	94,760	75,475	$ 21,955	$ 6,369
Other assets	33,847	35,108
Total assets	1,711,705	1,321,050
Subordinated debentures and notes	154,899	203,637
Notes payable	22,857	30,000
Accounts payable and other liabilities	4,833	8,439
Shareholders' equity	1,529,116	1,078,974
Total liabilities and shareholders' equity	1,711,705	1,321,050
Enterprise Bank and Trust [Member] | Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Investments	1,568,796	1,200,689
Nonbank Subsidiaries [Member] | Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Investments	$ 14,302	$ 9,778

Parent Company Only Condensed_5

Parent Company Only Condensed Financial Statements - Condensed Statements of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Income [Abstract]
Dividends from Bank	$ 1,275	$ 895	$ 1,055
Dividends from Other Subsidiaries	2,000	1,400	1,500
Expenses:
Interest expense	10,960	9,885	7,507
Income tax benefit	(35,578)	(17,563)	(23,297)
Income tax expense	133,055	74,384	92,739
Total comprehensive income	114,712	93,755	119,770
Parent [Member]
Operating Income [Abstract]
Dividends from Bank	95,000	37,000	60,000
Other	3,600	483	663
Total income	100,600	38,883	62,163
Expenses:
Interest expense	11,406	10,590	8,689
Other expenses	11,037	6,946	6,936
Total expenses	22,443	17,536	15,625
Income before taxes and equity in undistributed earnings of subsidiaries	78,157	21,347	46,538
Income tax benefit	3,710	3,448	3,478
Income tax expense	81,867	24,795	50,016
Equity in undistributed earnings of subsidiaries	51,188	49,589	42,723
Total comprehensive income	$ 133,055	$ 74,384	$ 92,739

Parent Company Only Condensed_6

Parent Company Only Condensed Financial Statements - Consolidated Statements of Cash Flow (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation		$ 6,017	$ 4,178	$ 4,032
Net cash provided by operating activities		160,575	135,514	92,457
Cash flows from investing activities:
Net cash paid for acquisitions and dispositions		212,642	62,114	(23,377)
Net cash used in investing activities		(23,114)	(702,829)	(378,520)
Cash flows from financing activities:
Proceeds from the issuance of subordinated notes		0	61,953	0
Repayments of Subordinated Debt		50,000	0	0
Proceeds from Notes Payable		0	0	41,000
Repayments of Notes Payable		7,143	4,286	8,714
Cash dividends paid		(26,153)	(19,795)	(16,568)
Payments for Repurchase of Common Stock		60,589	15,347	15,526
Proceeds from issuance of preferred stock, net	$ 72,000	71,988	0	0
Net cash provided by financing activities		1,346,525	937,762	256,767
Cash and cash equivalents, beginning of period		537,703	167,256	196,552
Cash and cash equivalents, end of period	2,021,689	$ 2,021,689	$ 537,703	$ 167,256
Noncash investing and financing transactions:
Stock Issued During Period, Shares, Acquisitions		343,650	167,035	171,885
Parent [Member]
Cash flows from operating activities:
Net income available to common shareholders		$ 133,055	$ 74,384	$ 92,739
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation		6,017	4,178	4,032
Net income of subsidiaries		(148,188)	(87,989)	(104,223)
Dividends from subsidiaries		97,000	38,400	61,500
Other, net		(16)	3,588	(1,063)
Net cash provided by operating activities		87,868	32,561	52,985
Cash flows from investing activities:
Net cash paid for acquisitions and dispositions		2,346	(1,243)	(36,015)
Purchases of other investments		(2,204)	(1,166)	(2,634)
Proceeds from distributions on other investments		2,656	765	1,271
Net cash used in investing activities		2,798	(1,644)	(37,378)
Cash flows from financing activities:
Proceeds from the issuance of subordinated notes		0	61,953	0
Repayments of Subordinated Debt		(50,000)	0	0
Proceeds from Notes Payable		0	0	1,000
Repayments of Notes Payable		0	0	3,000
Cash dividends paid		(26,153)	(19,795)	(16,569)
Payments for Repurchase of Common Stock		60,589	15,347	15,526
Proceeds from issuance of preferred stock, net		71,988	0	0
Payments for the repurchase of equity instruments, net		516	78	(212)
Net cash provided by financing activities		(71,381)	22,603	(21)
Net increase (decrease) in cash and cash equivalents		19,285	53,520	15,586
Cash and cash equivalents, beginning of period		75,475	21,955	6,369
Cash and cash equivalents, end of period	$ 94,760	$ 94,760	$ 75,475	$ 21,955
Noncash investing and financing transactions:
Stock Issued During Period, Shares, Acquisitions		343,650	167,035	171,885
Proceeds from Issuance of Long-term Debt		$ 0	$ 0	$ 40,000
Payments for the redemption of subordinated notes		$ (7,143)	$ (4,286)	$ (5,714)

Supplemental Financial Inform_3

Supplemental Financial Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Interim Period, Costs Not Allocable [Line Items]
Noninterest income	$ 67,743	$ 54,503	$ 49,176
Other	62,675	44,250	41,831
Amortization Expense
Interim Period, Costs Not Allocable [Line Items]
Other	5,691	5,673	5,543
Banking Expenses
Interim Period, Costs Not Allocable [Line Items]
Other	6,123	4,921	5,258
Customer Analysis Expense
Interim Period, Costs Not Allocable [Line Items]
Other	12,104	1,246	0
FDIC And Other Insurnace
Interim Period, Costs Not Allocable [Line Items]
Other	5,789	3,897	2,380
Loan, Legal Expenses
Interim Period, Costs Not Allocable [Line Items]
Other	7,130	4,003	3,526
Meals And Entertainment
Interim Period, Costs Not Allocable [Line Items]
Other	1,253	742	3,670
Outside Services
Interim Period, Costs Not Allocable [Line Items]
Other	4,992	4,961	4,335
Other Expenses
Interim Period, Costs Not Allocable [Line Items]
Other	19,593	18,807	17,119
Community Development Fees
Interim Period, Costs Not Allocable [Line Items]
Noninterest income	5,491	3,353	889
Other Miscellaneous Income
Interim Period, Costs Not Allocable [Line Items]
Noninterest income	16,657	13,609	11,007
Total miscellaneous income
Interim Period, Costs Not Allocable [Line Items]
Noninterest income	$ 22,148	$ 16,962	$ 11,896