Enterprise Financial Services (EFSC) 10-Q 24 Jul 20 2020 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2020	Jul. 22, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-15373
Entity Registrant Name	ENTERPRISE FINANCIAL SERVICES CORP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	43-1706259
Entity Address, Address Line One	150 North Meramec
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
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	EFSC
Security Exchange Name	NASDAQ
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		26,206,044
Entity Central Index Key	0001025835
Document Period End Date	Jun. 30, 2020
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Amendment Flag	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Assets
Cash and due from banks	$ 100,804	$ 74,769
Federal funds sold	2,381	3,060
Interest-earning deposits (including $47,085 and $15,285 pledged as collateral, respectively)	245,542	89,427
Total cash and cash equivalents	348,727	167,256
Interest-earning deposits greater than 90 days	6,907	3,730
Securities available-for-sale	998,104	1,135,317
Debt Securities, Held-To-Maturity, Net Of Allowance For Credit Losses	345,791	181,166
Trade and Loans Receivables Held-for-sale, Net, Not Part of Disposal Group	16,029	5,570
Loans	6,140,051	5,314,337
Less: Allowance for credit losses on loans	110,270	43,288
Total loans, net	6,029,781	5,271,049
Other investments	43,106	38,044
Fixed assets, net	58,231	60,013
Goodwill	210,344	210,344
Intangible assets, net	23,196	26,076
Other assets	277,285	235,226
Total assets	8,357,501	7,333,791
Liabilities and Shareholders' Equity
Noninterest-bearing deposit accounts	1,965,868	1,327,348
Interest-bearing transaction accounts	1,508,535	1,367,444
Money market accounts	1,962,916	1,713,615
Savings accounts	603,095	536,169
Certificates of deposit:
Brokered	85,414	215,758
Other	573,752	610,689
Total deposits	6,699,580	5,771,023
Subordinated debentures and notes	203,384	141,258
FHLB advances	250,000	222,406
Other borrowings	196,532	230,886
Notes payable	31,429	34,286
Other liabilities	108,613	66,747
Total liabilities	7,489,538	6,466,606
Shareholders' equity:
Preferred stock, $0.01 par value; 5,000,000 shares authorized; 0 shares issued and outstanding	0	0
Common stock, $0.01 par value; 45,000,000 shares authorized; 28,176,087 and 28,067,087 shares issued, respectively	281	281
Treasury stock, at cost; 1,980,093 and 1,523,842 shares, respectively	(73,528)	(58,181)
Additional paid in capital	527,734	526,599
Retained earnings	380,667	380,737
Accumulated other comprehensive income	32,809	17,749
Total shareholders' equity	867,963	867,185
Total liabilities and shareholders' equity	$ 8,357,501	$ 7,333,791

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Assets
Collateral pledged	$ 47,085	$ 15,285
Shareholders' equity:
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	45,000,000	45,000,000
Common stock, shares issued	28,176,087	28,067,087
Treasury stock, shares	1,980,093	1,523,842

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Interest income:
Interest and fees on loans	$ 64,478	$ 69,628	$ 131,647	$ 130,653
Interest on debt securities:
Taxable	6,587	7,757	14,144	13,232
Nontaxable	1,812	861	3,301	1,308
Interest on interest-earning deposits	87	703	387	1,150
Dividends on equity securities	227	252	400	475
Total interest income	73,191	79,201	149,879	146,818
Interest expense:
Interest Expense, Deposits	4,383	13,119	14,271	24,939
Subordinated debentures and notes	2,316	1,958	4,235	3,606
FHLB advances	455	1,696	1,350	3,094
Notes payable and other borrowings	204	713	822	1,121
Total interest expense	7,358	17,486	20,678	32,760
Net interest income	65,833	61,715	129,201	114,058
Provision for credit losses	19,591	1,722	41,855	3,198
Net interest income after provision for credit losses	46,242	59,993	87,346	110,860
Noninterest income:
Total noninterest income	9,960	11,964	23,368	21,194
Noninterest expense:
Employee compensation and benefits	22,389	20,687	44,074	40,039
Occupancy	3,185	3,188	6,532	5,825
Data processing	2,144	2,458	4,226	4,364
Professional fees	1,287	1,037	2,149	1,783
Merger-related expenses	0	10,306	0	17,576
Other	8,907	11,378	19,604	19,305
Total noninterest expense	37,912	49,054	76,585	88,892
Income before income tax expense	18,290	22,903	34,129	43,162
Income tax expense	3,656	4,479	6,627	8,582
Net income	$ 14,634	$ 18,424	$ 27,502	$ 34,580
Earnings per common share
Basic (usd per share)	$ 0.56	$ 0.69	$ 1.04	$ 1.36
Diluted (usd per share)	$ 0.56	$ 0.68	$ 1.04	$ 1.36
Deposit Account [Member]
Noninterest income:
Total noninterest income	$ 2,616	$ 3,366	$ 5,759	$ 6,301
Fiduciary and Trust [Member]
Noninterest income:
Total noninterest income	2,326	2,661	4,827	4,653
Card Services Revenue [Member]
Noninterest income:
Total noninterest income	2,225	2,461	4,472	4,251
Tax credit activity, net [Member]
Noninterest income:
Total noninterest income	(221)	572	1,815	730
Financial Service, Other [Member]
Noninterest income:
Total noninterest income	$ 3,014	$ 2,904	$ 6,495	$ 5,259

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 14,634	$ 18,424	$ 27,502	$ 34,580
Other comprehensive income (loss), after-tax:
Change in unrealized gain on available-for-sale debt securities	10,984	12,842	21,548	24,344
Reclassification adjustment for realized (gain) loss on sale of available-for-sale debt securities	0	0	(3)	220
Reclassification of (gain) loss on held-to-maturity securities	(329)	3	(485)	5
Change in unrealized loss on cash flow hedges arising during the period	(1,177)	(1,265)	(6,357)	(2,217)
Reclassification of loss on cash flow hedges	234	4	357	4
Total other comprehensive income, after-tax	9,712	11,584	15,060	22,356
Comprehensive income	$ 24,346	$ 30,008	$ 42,562	$ 56,936

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Beginning balance at Dec. 31, 2018	$ 603,804	$ 239	$ (42,655)	$ 350,936	$ 304,566	$ (9,282)
Net income	34,580	0	0	0	34,580	0
Other comprehensive income	22,356	0	0	0	0	22,356
Comprehensive income	56,936	0	0	0	34,580	22,356
Cash dividends paid on common shares	(7,798)	0	0	0	(7,798)	0
Issuance under equity compensation plans, net	(1,233)	1	0	(1,234)	0	0
Share-based Payment Arrangement, Noncash Expense	1,907	0	0	1,907	0	0
Shares issued in connection with acquisition	171,885	40	0	171,845	0	0
Ending balance at Jun. 30, 2019	825,501	280	(42,655)	523,454	331,348	13,074
Beginning balance at Mar. 31, 2019	797,835	280	(42,655)	521,761	316,959	1,490
Net income	18,424	0	0	0	18,424	0
Other comprehensive income	11,584	0	0	0	0	11,584
Comprehensive income	30,008	0	0	0	18,424	11,584
Cash dividends paid on common shares	(4,035)	0	0	0	4,035	0
Issuance under equity compensation plans, net	707	0	0	707	0	0
Share-based Payment Arrangement, Noncash Expense	986	0	0	986	0	0
Ending balance at Jun. 30, 2019	825,501	280	(42,655)	523,454	331,348	13,074
Beginning balance at Dec. 31, 2019	867,185	281	(58,181)	526,599	380,737	17,749
Net income	27,502	0	0	0	27,502	0
Other comprehensive income	15,060	0	0	0	0	15,060
Comprehensive income	42,562	0	0	0	27,502	15,060
Cash dividends paid on common shares	(9,458)	0	0	0	(9,458)	0
Repurchase of common stock	(15,347)	0	(15,347)	0	0	0
Issuance under equity compensation plans, net	(894)	0	0	(894)	0	0
Share-based Payment Arrangement, Noncash Expense	2,029	0	0	2,029	0	0
Reclassification for the adoption of new accounting standards	(18,114)	0	0	0	(18,114)	0
Ending balance at Jun. 30, 2020	867,963	281	(73,528)	527,734	380,667	32,809
Beginning balance at Mar. 31, 2020	846,436	281	(73,528)	525,838	370,748	23,097
Net income	14,634	0	0	0	14,634	0
Other comprehensive income	9,712	0	0	0	0	9,712
Comprehensive income	24,346	0	0	0	14,634	9,712
Cash dividends paid on common shares	(4,715)	0	0	0	(4,715)	0
Issuance under equity compensation plans, net	827	0	0	827	0	0
Share-based Payment Arrangement, Noncash Expense	1,069	0	0	1,069	0	0
Ending balance at Jun. 30, 2020	$ 867,963	$ 281	$ (73,528)	$ 527,734	$ 380,667	$ 32,809

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash dividends paid on common shares, per share	$ 0.36	$ 0.29
Issuance under equity compensation plans, shares	109,000	103,430

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows $ in Thousands	6 Months Ended
	Jun. 30, 2020USD ($)	Jun. 30, 2019USD ($)
Cash flows from operating activities:
Net income	$ 27,502	$ 34,580
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	3,048	2,743
Provision for credit losses	41,855	3,198
Deferred income taxes	(4,937)	3,813
Net amortization of debt securities	2,756	1,189
Amortization of intangible assets	2,880	2,418
Gain on sale of investment securities	(4)	292
Mortgage loans originated-for-sale	(94,536)	(11,645)
Proceeds from mortgage loans sold	84,799	10,629
Sale of other real estate	5	(48)
Sale of state tax credits	(211)	(107)
Share-based Payment Arrangement, Noncash Expense	2,029	1,907
Net accretion of loan discount	(4,049)	(4,702)
Changes in other assets and liabilities, net
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(2,277)	(23,700)
Net cash provided by operating activities	58,860	20,567
Cash flows from investing activities:
Payments for Previous Acquisition	0	(23,377)
Net increase in loans	(815,437)	(121,115)
Sale of debt securities, available-for-sale	207	263,298
Paydown or maturity of debt securities, available-for-sale	140,218	58,229
Paydown or maturity of debt securities, held-to-maturity	8,711	2,864
Redemption of other investments	25,978	31,138
Sale of state tax credits held for sale	1,924	2,252
Sale of other real estate	609	2,281
Proceeds from Life Insurance Policy	974	0
Payments for the purchase of:
Available-for-sale debt securities	(152,082)	(363,900)
Other investments	(38,527)	(43,589)
State tax credits held for sale	(3,730)	(1,852)
Fixed assets, net	(1,532)	(2,236)
Net cash used in investing activities	(832,687)	(196,007)
Cash flows from financing activities:
Net increase (decrease) in noninterest-bearing deposit accounts	638,520	(88,219)
Net increase (decrease) in interest-bearing deposit accounts	290,036	(21,615)
Proceeds from FHLB advances, net	27,700	312,500
Proceeds from Issuance of Long-term Debt	0	40,000
Repayments of Long-term Debt	(2,857)	(4,857)
Proceeds from Issuance of Subordinated Long-term Debt	61,953	0
Net decrease in other borrowings	(34,355)	(60,490)
Cash dividends paid on common stock	(9,458)	(7,798)
Payments for Repurchase of Common Stock	(15,347)	0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(894)	(1,233)
Net cash provided by financing activities	955,298	168,288
Net increase (decrease) in cash and cash equivalents	181,471	(7,152)
Cash and cash equivalents, beginning of period	167,256	196,552
Cash and cash equivalents, end of period	348,727	189,400
Noncash transactions:
Cash paid during the period for interest	20,574	32,036
Income Taxes Paid, Net	30	11,915
Transfer to other real estate owned in settlement of loans	0	7,783
Sales of other real estate financed	48	0
Right-of-use assets obtained in exchange for lease obligations	$ 200	$ 0
Common shares issued related to acquisition	0	171,885
Transfer to Investments	$ 163,592	$ 0

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES The significant accounting policies used by Enterprise Financial Services Corp (the “Company,” “EFSC,” or “Enterprise”) in the preparation of the condensed 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 located in the Arizona, Kansas, Missouri, and New Mexico markets through its banking subsidiary, Enterprise Bank & Trust. Operating results for the three and six months ended June 30, 2020 are not necessarily indicative of the results that may be expected for any other interim period or for the year ending December 31, 2020 . For further information, refer to the consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019 , as filed with the SEC. Basis of Financial Statement Presentation The accompanying unaudited condensed consolidated financial statements of the Company and its subsidiaries have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Except as disclosed herein, there has been no material change in the information disclosed in the Notes to Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019. The condensed consolidated financial statements include the accounts of the Company and its subsidiaries, all of which are wholly owned. All intercompany accounts and transactions have been eliminated. In the opinion of management, the consolidated financial statements contain all adjustments (consisting of normal recurring accruals) considered necessary for the fair presentation of the statements of financial position, results of operations, and cash flow for the interim periods. Recently Adopted Accounting Pronouncements On January 1, 2020, the Company adopted ASU 2016-13 “ Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments,” which replaces the incurred loss methodology with an expected loss methodology commonly referred to as the CECL methodology. The measurement of expected credit losses under the CECL methodology is applicable to financial assets measured at amortized cost, including loan receivables and held-to-maturity debt securities. It also applies to off-balance sheet credit exposures such as loan commitments, standby letters of credit, financial guarantees, and other similar instruments. In addition, this standard made changes to the accounting for available-for-sale debt securities, including the requirement for credit losses to be presented as an allowance rather than as a write-down on available-for-sale debt securities. The Company adopted this standard using the modified retrospective method for all financial assets measured at amortized cost, and off-balance-sheet credit exposures. Results for reporting periods beginning after January 1, 2020 are presented under the new standard while prior period amounts continue to be reported in accordance with previously applicable GAAP. The Company recorded an after-tax decrease to retained earnings of $18.1 million as of January 1, 2020 for the cumulative effect of adopting this standard. The Company adopted this standard using the prospective transition approach for PCD assets that were previously classified as PCI assets. Management did not reassess whether PCI assets met the criteria of PCD assets as of the date of the adoption. The Company elected not to maintain PCI pools for certain loans which are now accounted for individually. Thus they are now included in nonperforming and classified loans. Management did not reassess whether modifications to individual acquired financial assets accounted for in pools were troubled debt restructurings as of the date of adoption. The following table illustrates the impact of adoption: ($ in thousands) December 31, 2019 Impact of Adoption January 1, 2020 Assets: Loans $ 5,314,337 $ 7,091 $ 5,321,428 Allowance for credit losses on loans 43,288 28,387 71,675 Allowance for credit losses on held-to-maturity debt securities — 303 303 Deferred tax asset 14,851 5,898 20,749 Liabilities: Reserve for unfunded commitments 430 2,413 2,843 Shareholders’ Equity Retained Earnings 380,737 (18,114 ) 362,623 The Company also adopted ASU 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement” on January 1, 2020. The Company previously selected the option to adopt the removal or modification of disclosures during the second quarter of 2019. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty are applied prospectively for only the most recent interim or annual period presented. All other amendments are applied retrospectively to all periods presented upon their effective date. The adoption of this update did not have a material effect on the Company's consolidated financial statements. Accounting Standards Issued but not yet Adopted FASB ASU 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. ” In March 2020, the FASB issued “Reference Rate Reform (Topic 848)” which provides optional expedients and exceptions for contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. The guidance is effective for contract modifications as of March 12, 2020 through December 31, 2022. The Company is currently evaluating the optional expedients and exceptions and has not yet determined the impact this standard may have on its consolidated financial statements. Loans 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 $19.7 million at June 30, 2020 and was reported in Other Assets on the consolidated balance sheets. PCD Loans The Company has purchased loans, some of which have experienced more than insignificant credit deterioration since origination. PCD loans are recorded at the amount paid. An ACL is determined using the same methodology as other loans held for investment. The initial ACL determined on a collective basis is allocated to individual loans. The sum of the loan’s purchase price and ACL becomes its initial amortized cost basis. 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. Subsequent changes to the ACL are recorded through provision expense. Allowance for Credit Losses on Loans The ACLL 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 ACLL 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 enterprise value lending, 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 one- to four-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, cattle, 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 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 a 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. The annual percentage change in gross domestic product is also used in C&I, Construction, Agricultural and Consumer portfolios. The annual percentage change in a commercial real estate index, national house price index and the consumer price index are used in the CRE, 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 six-month 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 that 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.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2020
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE Basic earnings per common share data is calculated by dividing net income 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. The following table presents a summary of per common share data and amounts for the periods indicated. Three months ended June 30, Six months ended June 30, (in thousands, except per share data) 2020 2019 2020 2019 Net income as reported $ 14,634 $ 18,424 $ 27,502 $ 34,580 Weighted average common shares outstanding 26,180 26,887 26,325 25,415 Additional dilutive common stock equivalents 15 53 29 73 Weighted average diluted common shares outstanding 26,195 26,940 26,354 25,488 Basic earnings per common share: $ 0.56 $ 0.69 $ 1.04 $ 1.36 Diluted earnings per common share: 0.56 0.68 $ 1.04 $ 1.36 For the three and six months ended June 30, 2020 common stock equivalents of approximately 157,000 and 147,000 , respectively, were excluded from the earnings per share calculations because their effect would have been anti-dilutive. Comparatively, there were 130,000 and 99,000

Investments

Investments	6 Months Ended
	Jun. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Investments	INVESTMENTS The following table presents the amortized cost, gross unrealized gains and losses, allowance of credit losses and fair value of securities available for sale and held to maturity: June 30, 2020 (in thousands) Amortized Cost Gross Gross Allowance for Credit Losses Fair Value Available-for-sale securities: Obligations of U.S. Government-sponsored enterprises $ 9,966 $ 275 $ — $ — $ 10,241 Obligations of states and political subdivisions 245,961 8,450 (133 ) — 254,278 Agency mortgage-backed securities 693,082 27,915 (6 ) — 720,991 U.S. Treasury bills 9,975 591 — — 10,566 Corporate debt securities 2,000 28 — — 2,028 Total securities available for sale $ 960,984 $ 37,259 $ (139 ) $ — $ 998,104 Held-to-maturity securities: Obligations of states and political subdivisions $ 96,547 $ 336 $ (122 ) $ (16 ) $ 96,745 Agency mortgage-backed securities 127,353 2,469 (28 ) — 129,794 Corporate debt securities 122,536 7,693 — (629 ) 129,600 Total securities held-to-maturity $ 346,436 $ 10,498 $ (150 ) $ (645 ) $ 356,139 Less: Allowance for credit losses 645 Total securities held-to-maturity, net $ 345,791 December 31, 2019 (in thousands) Amortized Cost Gross Gross Fair Value Available-for-sale securities: Obligations of U.S. Government-sponsored enterprises $ 9,954 $ 92 $ — $ 10,046 Obligations of states and political subdivisions 207,269 6,118 (363 ) 213,024 Agency mortgage-backed securities 888,129 15,083 (1,191 ) 902,021 U.S. Treasury Bills 9,971 255 — 10,226 Total securities available for sale $ 1,115,323 $ 21,548 $ (1,554 ) $ 1,135,317 Held-to-maturity securities: Obligations of states and political subdivisions $ 11,704 $ 170 $ — $ 11,874 Agency mortgage-backed securities 46,346 675 — 47,021 Corporate debt securities 123,116 128 (200 ) 123,044 Total securities held to maturity $ 181,166 $ 973 $ (200 ) $ 181,939 During the second quarter of 2020, the Company transferred municipal securities and agency mortgage-backed securities with a book value of $163.6 million and fair value of $ 175.1 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 $11.5 million 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. Such amounts are amortized over the remaining life of the securities. At June 30, 2020 and December 31, 2019 , there were no holdings of securities of any one issuer in an amount greater than 10% of shareholders’ equity, other than U.S. Government agencies and sponsored enterprises. The agency mortgage-backed securities are all issued by U.S. Government agencies and sponsored enterprises. Securities having a fair value of $449.9 million and $484.8 million at June 30, 2020 and December 31, 2019 , 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 June 30, 2020 , 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. The weighted average life of the mortgage-backed securities is approximately 3 years . Available for sale Held to maturity (in thousands) Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Due in one year or less $ 2,313 $ 2,345 $ — $ — Due after one year through five years 25,981 27,058 10,207 10,597 Due after five years through ten years 9,455 9,915 126,285 133,206 Due after ten years 230,153 237,795 82,591 82,542 Agency mortgage-backed securities 693,082 720,991 127,353 129,794 $ 960,984 $ 998,104 $ 346,436 $ 356,139 The following table represents a summary of available-for-sale investment securities that had an unrealized loss: June 30, 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 states and political subdivisions $ 33,821 $ 133 $ — $ — $ 33,821 $ 133 Agency mortgage-backed securities 8,366 5 66 1 8,432 6 $ 42,187 $ 138 $ 66 $ 1 $ 42,253 $ 139 The following table represents a summary of investment securities that had an unrealized loss: December 31, 2019 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 states and political subdivisions 56,327 363 — — 56,327 363 Agency mortgage-backed securities 131,693 756 41,491 435 173,184 1,191 Corporate debt securities 67,964 200 — — 67,964 200 $ 255,984 $ 1,319 $ 41,491 $ 435 $ 297,475 $ 1,754 The unrealized losses at both June 30, 2020 and December 31, 2019 , were primarily attributable to changes in market interest rates since the securities were purchased. Management systematically evaluates investment securities for other-than-temporary declines in fair value on a quarterly basis. This analysis requires management to consider various factors, which include among other considerations (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 is more likely than not the Company would be required to sell the security before its anticipated recovery in market value. At June 30, 2020 , management performed its quarterly analysis of all securities with an unrealized loss and concluded no individual securities were other-than-temporarily impaired. Accrued interest receivable on available-for-sale debt securities totaled $3.6 million at June 30, 2020 and is excluded from the estimate of credit losses. Accrued interest receivable on held-to-maturity debt securities totaled $2.3 million at June 30, 2020 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 June 30, 2020, the ACL on held-to-maturity securities was $0.6 million .

Loans

Loans	6 Months Ended
	Jun. 30, 2020
Receivables [Abstract]
Portfolio Loans	LOANS Below is a summary of loans by category at June 30, 2020 and December 31, 2019 : (in thousands) June 30, 2020 December 31, 2019 Commercial and industrial $ 3,165,611 $ 2,361,157 Real estate: Commercial - investor owned 1,309,895 1,299,884 Commercial - owner occupied 738,549 697,437 Construction and land development 481,221 457,273 Residential 326,992 366,261 Total real estate loans 2,856,657 2,820,855 Other 142,224 134,941 Loans, before unearned loan fees 6,164,492 5,316,953 Unearned loan fees, net (24,441 ) (2,616 ) Loans, including unearned loan fees $ 6,140,051 $ 5,314,337 PPP loans totaled $830.2 million at June 30, 2020, or $807.8 million net of unearned fees of $22.4 million . The loan balance at June 30, 2020 also includes a discount on acquired loans of $22.2 million . At June 30, 2020 loans of $2.4 billion were pledged to FHLB and the Federal Reserve Bank. A summary of the activity in the ACLL by category for the three and six months ended June 30, 2020 is as follows: (in thousands) Commercial and industrial CRE - investor owned CRE - owner occupied Construction and land development Residential real estate Other Total Allowance for credit losses on loans: Balance at March 31, 2020 $ 45,981 $ 19,892 $ 9,477 $ 9,895 $ 5,395 $ 1,547 $ 92,187 Provision for credit losses 7,168 2,599 1,600 6,038 744 242 18,391 Charge-offs (3,303 ) (224 ) — — (32 ) (105 ) (3,664 ) Recoveries 293 2,752 11 29 226 45 3,356 Balance at June 30, 2020 $ 50,139 $ 25,019 $ 11,088 $ 15,962 $ 6,333 $ 1,729 $ 110,270 (in thousands) Commercial and industrial CRE - investor owned CRE - owner occupied Construction and land development Residential real estate Other Total Allowance for credit losses on loans: Balance at December 31, 2019 $ 27,455 $ 5,935 $ 4,873 $ 2,611 $ 1,280 $ 1,134 $ 43,288 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 at January 1, 2020 $ 33,949 $ 16,656 $ 7,414 $ 7,577 $ 3,349 $ 1,050 $ 69,995 Provision for credit losses 18,759 5,823 3,594 8,347 2,755 808 40,086 Charge-offs (3,366 ) (226 ) — (31 ) (154 ) (191 ) (3,968 ) Recoveries 797 2,766 80 69 383 62 4,157 Balance at June 30, 2020 $ 50,139 $ 25,019 $ 11,088 $ 15,962 $ 6,333 $ 1,729 $ 110,270 Reserves on enterprise value lending and agricultural lending, which are included in the categories above, represented $15.8 million and $2.4 million , respectively. On January 1, 2020, the Company adopted the CECL methodology which added $28.4 million to the ACLL. Upon adoption, $1.7 million of nonaccrual PCD loans that were less than $100,000 were immediately charged-off. Under the CECL method, the Company recorded a $18.4 million and $40.1 million provision for credit losses on loans in the three and six months ended June 30, 2020, respectively, compared to a $1.7 million and $3.2 million provision for loan losses in the prior year periods, respectively, under the incurred loss method. The increase in the provision for credit losses on loans is primarily due to the Company’s forecast of macroeconomic factors over the next 12 months, which significantly deteriorated in the first quarter 2020 due to the COVID-19 pandemic. The forecast continued to worsen in the second quarter of 2020. The CECL methodology incorporates various economic scenarios. The Company utilizes three forecasts in the model, a Moody’s baseline, a stronger near-term growth and a moderate recession forecast. The Company weights these scenarios at 80% , 10% , and 10% , respectively. These forecasts incorporate an accommodative monetary policy and the current and anticipated impact of government stimulus. Accordingly, the CECL model has not been adjusted for negative qualitative factors, such as the potential loss mitigation of loan deferrals and the PPP. Some of the key risks to the forecasts that could result in future provision for credit losses are additional shutdowns and self-quarantines if a second wave of COVID hits, small-business bankruptcies occur at higher levels or unemployment increases. The 80/10/10 weighting adds approximately $1.0 million to the ACL. The recorded investment in nonperforming loans by category at June 30, 2020 and December 31, 2019 , is as follows: June 30, 2020 (in thousands) Nonaccrual Restructured, accruing Loans over 90 days past due and still accruing interest Total nonperforming loans Nonaccrual loans with no allowance Commercial and industrial $ 27,431 $ 3,642 $ 865 $ 31,938 $ 20,553 Real estate: Commercial - investor owned 2,389 — — 2,389 1,677 Commercial - owner occupied 2,400 — — 2,400 1,403 Construction and land development 207 — — 207 207 Residential 4,421 78 — 4,499 3,444 Other 19 — 21 40 — Total $ 36,867 $ 3,720 $ 886 $ 41,473 $ 27,284 There was no interest income recognized on nonaccrual loans during the six months ended June 30, 2020. December 31, 2019 (in thousands) Nonaccrual Restructured, accruing Loans over 90 days past due and still accruing interest Total nonperforming loans Commercial and industrial $ 22,328 $ — $ 250 $ 22,578 Real estate: Commercial - investor owned 2,303 — — 2,303 Commercial - owner occupied 213 — — 213 Residential 1,251 79 — 1,330 Other 1 — — 1 Total $ 26,096 $ 79 $ 250 $ 26,425 The following table presents the amortized cost basis of collateral-dependent nonperforming loans by class of loan at June 30, 2020: Type of Collateral (in thousands) Commercial Real Estate Residential Real Estate Blanket Lien Commercial and industrial $ 13,124 $ — $ 4,872 Real estate: Commercial - investor owned 2,389 — — Commercial - owner occupied 1,811 — — Construction and land development — 207 — Residential — 4,271 — Total $ 17,324 $ 4,478 $ 4,872 There were no troubled debt restructurings that occurred during the three months ended June 30, 2020. The recorded investment by category for troubled debt restructurings that occurred during the six months ended June 30, 2020 and the three and six months ended June 30, 2019 are as follows: June 30, 2020 June 30, 2019 (in thousands, except for number of loans) Number of loans Pre-Modification Outstanding Recorded Balance Post-Modification Outstanding Recorded Balance Number of loans Pre-Modification Outstanding Recorded Balance Post-Modification Outstanding Recorded Balance Commercial and industrial 1 $ 3,731 $ 3,731 — $ — $ — Real estate: Commercial - owner occupied — — — 1 188 188 Residential 2 155 155 2 332 332 Total 3 $ 3,886 $ 3,886 3 $ 520 $ 520 There were no troubled debt restructured loans that subsequently defaulted during the three or six months ended June 30, 2020 or 2019. In response to the COVID-19 pandemic, the Company has 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 June 30, 2020, $685.7 million in loans have participated in the programs, including $361.4 million in loans deferring full principal and interest payments and $324.3 million in loans deferring principal only. Interest of $4.0 million has been deferred and will be collected upon final maturity. The Company has moved all loans that have requested deferrals to a level six risk rating for additional monitoring. The aging of the recorded investment in past due loans by class at June 30, 2020 is shown below. June 30, 2020 (in thousands) 30-89 Days Past Due 90 or More Past Due Total Past Due Current Total Commercial and industrial $ 6,684 $ 22,623 $ 29,307 $ 3,113,890 $ 3,143,197 Real estate: Commercial - investor owned 116 2,095 2,211 1,307,684 1,309,895 Commercial - owner occupied 2,723 1,208 3,931 734,618 738,549 Construction and land development 58 — 58 481,163 481,221 Residential 951 1,738 2,689 324,303 326,992 Other 100 21 121 140,076 140,197 Total $ 10,632 $ 27,685 $ 38,317 $ 6,101,734 $ 6,140,051 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, 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 at this time, due to strong collateral and/or guarantor support. • Grade 8 – Substandard credits 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 nonaccrual. The recorded investment by risk category of the loans by class at June 30, 2020 , which is based upon the most recent analysis performed is as follows: 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) $ 1,239,062 $ 535,477 $ 318,046 $ 180,269 $ 47,210 $ 85,529 $ 14,954 $ 510,168 $ 2,930,715 Watch (7) 26,347 13,354 4,850 6,468 24,044 175 — 62,293 137,531 Classified (8-9) 3,775 15,068 8,155 3,950 5,093 3,673 295 23,222 63,231 Total Commercial and industrial $ 1,269,184 $ 563,899 $ 331,051 $ 190,687 $ 76,347 $ 89,377 $ 15,249 $ 595,683 $ 3,131,477 Commercial real estate-investor owned Pass (1-6) $ 246,319 $ 321,849 $ 204,242 $ 126,567 $ 153,904 $ 181,761 $ 3,284 $ 35,460 $ 1,273,386 Watch (7) 5,136 4,220 1,192 369 12,681 1,275 — — 24,873 Classified (8-9) — 966 8,286 455 249 1,680 — — 11,636 Total Commercial real estate-investor owned $ 251,455 $ 327,035 $ 213,720 $ 127,391 $ 166,834 $ 184,716 $ 3,284 $ 35,460 $ 1,309,895 Commercial real estate-owner occupied Pass (1-6) $ 147,313 $ 200,519 $ 92,624 $ 79,058 $ 44,990 $ 80,172 $ 2,756 $ 42,883 $ 690,315 Watch (7) 9,473 1,963 261 9,729 8,533 5,074 — 2,500 37,533 Classified (8-9) 601 1,156 4,267 458 — 4,219 — — 10,701 Total Commercial real estate-owner occupied $ 157,387 $ 203,638 $ 97,152 $ 89,245 $ 53,523 $ 89,465 $ 2,756 $ 45,383 $ 738,549 Construction real estate Pass (1-6) $ 75,983 $ 167,936 $ 121,909 $ 37,555 $ 28,060 $ 12,906 $ — $ 20,631 $ 464,980 Watch (7) 2,408 722 1,254 11,047 — 546 — — 15,977 Classified (8-9) — 227 — — — 37 — — 264 Total Construction real estate $ 78,391 $ 168,885 $ 123,163 $ 48,602 $ 28,060 $ 13,489 $ — $ 20,631 $ 481,221 Residential real estate Pass (1-6) $ 26,448 $ 33,085 $ 22,074 $ 19,931 $ 34,427 $ 115,036 $ 591 $ 63,505 $ 315,097 Watch (7) 181 895 842 — — 2,027 279 802 5,026 Classified (8-9) 184 1,265 758 13 213 3,445 — 50 5,928 Total residential real estate $ 26,813 $ 35,245 $ 23,674 $ 19,944 $ 34,640 $ 120,508 $ 870 $ 64,357 $ 326,051 Other Pass (1-6) $ 8,758 $ 25,567 $ 20,615 $ 682 $ 3,705 $ 34,455 $ — $ 43,971 $ 137,753 Watch (7) — 2 — — — — — 1 3 Classified (8-9) — 1 3 4 — 19 10 7 44 Total Other $ 8,758 $ 25,570 $ 20,618 $ 686 $ 3,705 $ 34,474 $ 10 $ 43,979 $ 137,800 In the table above, loan originations in 2020 and 2019 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 table presents the recorded investment on loans based on payment activity: June 30, 2020 (in thousands) Performing Non Performing Total Commercial and industrial $ 11,682 $ 38 $ 11,720 Real estate: Residential 941 — 941 Other 2,376 21 2,397 Total $ 14,999 $ 59 $ 15,058 The recorded investment by risk category of loans by class at December 31, 2019 , was as follows: December 31, 2019 (in thousands) Pass (1-6) Watch (7) Classified (8 & 9) Total* Commercial and industrial $ 2,151,084 $ 124,718 $ 70,021 $ 2,345,823 Real estate: Commercial - investor owned 1,242,569 17,572 2,840 1,262,981 Commercial - owner occupied 643,276 28,773 6,473 678,522 Construction and land development 437,134 12,140 106 449,380 Residential 348,246 4,450 2,496 355,192 Other 132,096 3 51 132,150 Total $ 4,954,405 $ 187,656 $ 81,987 $ 5,224,048 *Excludes $90.3 million of loans accounted for as PCI

Commitments

Commitments	6 Months Ended
	Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments	COMMITMENTS AND CONTINGENCIES The Company issues financial instruments with off balance sheet risk 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 represented by 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 June 30, 2020 , and December 31, 2019 , are as follows: (in thousands) June 30, 2020 December 31, 2019 Commitments to extend credit $ 1,659,225 $ 1,469,413 Letters of credit 51,798 47,969 Off-Balance Sheet Credit Risk 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 June 30, 2020 , and December 31, 2019 , approximately $161.3 million and $144.8 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 requirements. 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. Other liabilities includes $4.9 million and $0.4 million for estimated losses attributable to the unadvanced commitments at June 30, 2020 , and December 31, 2019 , respectively. Standby letters of credit are conditional commitments issued by the Company to guarantee the performance or payment of a customer to a third party. These standby 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. As of June 30, 2020 , the approximate remaining terms of standby letters of credit range from 1 month to 4 years . 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 proceedings pending or threatened against the Company or its subsidiaries which, 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.

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Jun. 30, 2020
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. These derivatives were used to hedge the variable cash flows associated with existing variable-rate debt. These cash flow hedges include: (1) swaps of variable three-month LIBOR on $62.0 million of junior subordinated debentures to a weighted-average-fixed rate of 2.62% over approximately six years , (2) a swap of the federal funds effective rate on $100.0 million of rolling FHLB overnight advances to a fixed rate of 1.12% for three years , and (3) a swap of three-month LIBOR on $100.0 million of rolling three-month FHLB advances for five years . For derivatives designated and that qualify 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 that an additional $2.8 million will be reclassified as an increase to interest expense. 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 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 June 30, 2020 and December 31, 2019 . Derivative Assets Derivative Liabilities June 30, 2020 December 31, 2019 June 30, 2020 December 31, 2019 (in thousands) Notional Amount Balance Sheet Location Fair Value Notional Amount Balance Sheet Location Fair Value Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives Designated as Hedging Instruments Interest rate swap $ 261,962 Other Assets $ — $ 61,962 Other Assets $ — Other Liabilities $ 10,840 Other Liabilities $ 2,872 Total $ — $ — $ 10,840 $ 2,872 Derivatives not Designated as Hedging Instruments Interest rate swap $ 1,021,528 Other Assets $ 35,728 $ 749,819 Other Assets $ 11,055 Other Liabilities $ 35,988 Other Liabilities $ 11,875 Total $ 35,728 $ 11,055 $ 35,988 $ 11,875 The table below presents a gross presentation, the effects of offsetting, and a net presentation of the Company’s financial instruments that are subject to offsetting as of June 30, 2020 and December 31, 2019 . 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 June 30, 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 swap $ 35,728 $ — $ 35,728 $ 14 $ — $ 35,714 Liabilities: Interest rate swap $ 46,828 $ — $ 46,828 $ 14 $ 46,222 $ 592 Securities sold under agreements to repurchase 196,532 — 196,532 — 196,532 — As of December 31, 2019 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 swap $ 11,055 $ — $ 11,055 $ 56 $ — $ 10,999 Liabilities: Interest rate swap $ 14,747 $ — $ 14,747 $ 56 $ 14,573 $ 118 Securities sold under agreements to repurchase 230,886 — 230,886 — 230,886 — As of June 30, 2020 , the fair value of derivatives in a net liability position, which includes accrued interest but excludes any adjustment for nonperformance risk, related to these agreements was $46.8 million . Further, the Company has minimum collateral posting thresholds with certain of its derivative counterparties and has posted collateral of $47.1 million

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS The following table summarizes financial instruments measured at fair value on a recurring basis as of June 30, 2020 and December 31, 2019 , segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value: June 30, 2020 (in thousands) Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Fair Value Assets Securities available for sale Obligations of U.S. Government-sponsored enterprises $ — $ 10,241 $ — $ 10,241 Obligations of states and political subdivisions — 254,278 — 254,278 Agency mortgage-backed securities — 720,991 — 720,991 U.S. Treasury bills — 10,566 — 10,566 Corporate debt securities — 2,028 — 2,028 Total securities available for sale — 998,104 — 998,104 Derivatives — 35,728 — 35,728 Total assets $ — $ 1,033,832 $ — $ 1,033,832 Liabilities Derivatives $ — $ 46,828 $ — $ 46,828 Total liabilities $ — $ 46,828 $ — $ 46,828 December 31, 2019 (in thousands) Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Fair Value Assets Securities available for sale Obligations of U.S. Government-sponsored enterprises $ — $ 10,046 $ — $ 10,046 Obligations of states and political subdivisions — 213,024 — 213,024 Residential mortgage-backed securities — 902,021 — 902,021 U.S. Treasury bills — 10,226 — 10,226 Total securities available-for-sale — 1,135,317 — 1,135,317 Derivative financial instruments — 11,055 — 11,055 Total assets $ — $ 1,146,372 $ — $ 1,146,372 Liabilities Derivatives $ — $ 14,747 $ — $ 14,747 Total liabilities $ — $ 14,747 $ — $ 14,747 From time to time, the Company measures certain assets at fair value on a nonrecurring basis. These include assets measured at the lower of cost or fair value that were recognized at fair value below cost at the end of the period. (1) (1) (1) (1) (in thousands) Total Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant (Level 3) Total losses for the three Total losses for the six months ended June 30, 2020 Impaired loans $ 3,627 $ — $ — $ 3,627 $ 3,219 $ 3,230 Other real estate 3,899 — — 3,899 79 777 Total $ 7,526 $ — $ — $ 7,526 $ 3,298 $ 4,007 (1) The amounts represent only balances measured at fair value during the period and still held as of the reporting date. Following is a summary of the carrying amounts and fair values of the Company’s financial instruments on the consolidated balance sheets at June 30, 2020 and December 31, 2019 . June 30, 2020 December 31, 2019 (in thousands) Carrying Amount Estimated fair value Level Carrying Amount Estimated fair value Level Balance sheet assets Securities held-to-maturity, net 345,791 356,139 Level 2 181,166 181,939 Level 2 Other investments 43,106 43,106 Level 2 38,044 38,044 Level 2 Loans held for sale 16,029 16,029 Level 2 5,570 5,570 Level 2 Loans, net 6,029,781 5,876,000 Level 3 5,271,049 5,205,651 Level 3 State tax credits, held for sale 38,820 44,164 Level 3 36,802 39,046 Level 3 Balance sheet liabilities Certificates of deposit 659,166 665,374 Level 3 826,447 825,203 Level 3 Subordinated debentures and notes 203,384 192,852 Level 2 141,258 130,985 Level 2 FHLB advances 250,000 251,978 Level 2 222,406 221,402 Level 2 Other borrowings and notes payable 227,961 227,961 Level 2 265,172 265,172 Level 2 For information regarding the methods and assumptions used to estimate the fair value of each class of financial instruments refer to Note 19 – Fair Value Measurements in the Company’s Annual Report on Form 10 -K for the year ended December 31, 2019 , as filed with the SEC.

Subordinated Debentures

Subordinated Debentures	6 Months Ended
	Jun. 30, 2020
Subordinated Borrowings [Abstract]
Subordinated Debentures	NOTE 8 - SUBORDINATED DEBENTURES The amounts and terms of each issuance of the Company’s subordinated debentures at June 30, 2020 and December 31, 2019 were as follows: Amount Maturity Date Initial Call Date (1) Interest Rate (in thousands) June 30, 2020 December 31, 2019 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) 7,819 7,886 February 22, 2031 February 22, 2011 Fixed 10.20% JEFFCO Stat Trust II (2) 4,415 4,388 March 17, 2034 March 17, 2009 Floats 3MO LIBOR + 2.75% Trinity Capital Trust III (2) 5,239 5,206 September 8, 2034 September 8, 2009 Floats 3MO LIBOR + 2.70% Trinity Capital Trust IV (2) 10,310 10,302 November 23, 2035 August 23, 2010 Fixed 6.88% Trinity Capital Trust V (2) 7,625 7,543 December 15, 2036 September 15, 2011 Floats 3MO LIBOR + 1.65% Total junior subordinated debentures 92,215 92,132 5.75% Fixed-to-floating rate subordinated notes 63,250 — June 1, 2030 June 1, 2025 Fixed 5.75% until 4.75% Fixed-to-floating rate subordinated notes 50,000 50,000 November 1, 2026 November 1, 2021 Fixed 4.75% until Debt issuance costs (2,081 ) (874 ) Total fixed-to-floating rate subordinated notes 111,169 49,126 Total subordinated debentures and notes $ 203,384 $ 141,258 (1) Callable each quarter after initial call date. (2) Purchase accounting adjustments are reflected in the balance and also impact the effective interest rate. On May 21, 2020, the Company issued $63.3 million of 5.75% fixed-to-floating rate subordinated notes due in 2030 in a public offering (the “2030 Notes”). From and including the date of issuance to, but excluding June 1, 2025, the 2030 Notes will bear interest at a rate equal to 5.75% per annum, payable semiannually in arrears on each June 1 and December 1. From and including June 1, 2025 to, but excluding the maturity date or the date of earlier redemption, the 2030 Notes will bear interest at a floating rate per annum equal to a benchmark rate (which is expected to be three-month term SOFR (as defined in the Indenture, dated May 21, 2020, between the Company and U.S. Bank National Association, as trustee, and subsequent First Supplemental Indenture)), plus 566.0 basis points, payable quarterly in arrears on March 1, June 1, September 1 and December 1 of each year, commencing on September 1, 2025. Notwithstanding the foregoing, in the event that the benchmark rate is less than zero, then the benchmark rate shall be deemed to be zero.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Accumulated Other Comprehensive Income	ACCUMULATED OTHER COMPREHENSIVE INCOME The following table presents the changes in accumulated other comprehensive income 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, March 31, 2020 $ 25,538 $ 4,778 $ (7,219 ) $ 23,097 Net change 10,984 (329 ) (943 ) 9,712 Transfer from available-for-sale to held-to-maturity $ (8,650 ) $ 8,650 $ — $ — Balance, June 30, 2020 $ 27,872 $ 13,099 $ (8,162 ) $ 32,809 Balance, December 31, 2019 $ 14,977 $ 4,934 $ (2,162 ) $ 17,749 Net change 21,545 (485 ) (6,000 ) 15,060 Transfer from available-for-sale to held-to-maturity $ (8,650 ) $ 8,650 $ — $ — Balance, June 30, 2020 $ 27,872 $ 13,099 $ (8,162 ) $ 32,809 (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, March 31, 2019 $ 2,675 $ (233 ) $ (952 ) $ 1,490 Net change 12,842 3 (1,261 ) 11,584 Balance, June 30, 2019 $ 15,517 $ (230 ) $ (2,213 ) $ 13,074 Balance, December 31, 2018 $ (9,047 ) $ (235 ) $ — $ (9,282 ) Net change 24,564 5 (2,213 ) 22,356 Balance, June 30, 2019 $ 15,517 $ (230 ) $ (2,213 ) $ 13,074 The following table presents the pre-tax and after-tax changes in the components of other comprehensive income: Three months ended June 30, (in thousands) 2020 2019 Pre-tax Tax effect After-tax Pre-tax Tax effect After-tax Change in unrealized gain on available-for-sale debt securities $ 14,587 $ 3,603 $ 10,984 $ 17,054 $ 4,212 $ 12,842 Reclassification of (gain) loss on held-to-maturity securities (b) (437 ) (108 ) (329 ) 4 1 3 Change in unrealized loss on cash flow hedges arising during the period (1,563 ) (386 ) (1,177 ) (1,679 ) (414 ) (1,265 ) Reclassification of loss on cash flow hedges (b) 311 77 234 5 1 4 Total other comprehensive income $ 12,898 $ 3,186 $ 9,712 $ 15,384 $ 3,800 $ 11,584 Six months ended June 30, 2020 2019 Pre-tax Tax effect After-tax Pre-tax Tax effect After-tax Change in unrealized gain on available-for-sale debt securities $ 28,616 $ 7,068 $ 21,548 $ 32,329 $ 7,985 $ 24,344 Reclassification adjustment for realized (gain) loss on sale of available-for-sale debt securities (a) (4 ) (1 ) (3 ) 292 72 220 Reclassification of (gain) loss on held-to-maturity securities (b) (644 ) (159 ) (485 ) 7 2 5 Change in unrealized loss on cash flow hedges arising during the period (8,442 ) (2,085 ) (6,357 ) (2,944 ) (727 ) (2,217 ) Reclassification of loss on cash flow hedges (b) 474 117 357 5 1 4 Total other comprehensive income $ 20,000 $ 4,940 $ 15,060 $ 29,689 $ 7,333 $ 22,356 (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

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2020
Accounting Policies [Abstract]
Business and Consolidation	Basis of Financial Statement Presentation The accompanying unaudited condensed consolidated financial statements of the Company and its subsidiaries have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Except as disclosed herein, there has been no material change in the information disclosed in the Notes to Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019. The condensed consolidated financial statements include the accounts of the Company and its subsidiaries, all of which are wholly owned. All intercompany accounts and transactions have been eliminated. In the opinion of management, the consolidated financial statements contain all adjustments (consisting of normal recurring accruals) considered necessary for the fair presentation of the statements of financial position, results of operations, and cash flow for the interim periods. Recently Adopted Accounting Pronouncements On January 1, 2020, the Company adopted ASU 2016-13 “ Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments,” which replaces the incurred loss methodology with an expected loss methodology commonly referred to as the CECL methodology. The measurement of expected credit losses under the CECL methodology is applicable to financial assets measured at amortized cost, including loan receivables and held-to-maturity debt securities. It also applies to off-balance sheet credit exposures such as loan commitments, standby letters of credit, financial guarantees, and other similar instruments. In addition, this standard made changes to the accounting for available-for-sale debt securities, including the requirement for credit losses to be presented as an allowance rather than as a write-down on available-for-sale debt securities. The Company adopted this standard using the modified retrospective method for all financial assets measured at amortized cost, and off-balance-sheet credit exposures. Results for reporting periods beginning after January 1, 2020 are presented under the new standard while prior period amounts continue to be reported in accordance with previously applicable GAAP. The Company recorded an after-tax decrease to retained earnings of $18.1 million as of January 1, 2020 for the cumulative effect of adopting this standard. The Company adopted this standard using the prospective transition approach for PCD assets that were previously classified as PCI assets. Management did not reassess whether PCI assets met the criteria of PCD assets as of the date of the adoption. The Company elected not to maintain PCI pools for certain loans which are now accounted for individually. Thus they are now included in nonperforming and classified loans. Management did not reassess whether modifications to individual acquired financial assets accounted for in pools were troubled debt restructurings as of the date of adoption. The following table illustrates the impact of adoption: ($ in thousands) December 31, 2019 Impact of Adoption January 1, 2020 Assets: Loans $ 5,314,337 $ 7,091 $ 5,321,428 Allowance for credit losses on loans 43,288 28,387 71,675 Allowance for credit losses on held-to-maturity debt securities — 303 303 Deferred tax asset 14,851 5,898 20,749 Liabilities: Reserve for unfunded commitments 430 2,413 2,843 Shareholders’ Equity Retained Earnings 380,737 (18,114 ) 362,623 The Company also adopted ASU 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement” on January 1, 2020. The Company previously selected the option to adopt the removal or modification of disclosures during the second quarter of 2019. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty are applied prospectively for only the most recent interim or annual period presented. All other amendments are applied retrospectively to all periods presented upon their effective date. The adoption of this update did not have a material effect on the Company's consolidated financial statements. Accounting Standards Issued but not yet Adopted FASB ASU 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. ” In March 2020, the FASB issued “Reference Rate Reform (Topic 848)” which provides optional expedients and exceptions for contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. The guidance is effective for contract modifications as of March 12, 2020 through December 31, 2022. The Company is currently evaluating the optional expedients and exceptions and has not yet determined the impact this standard may have on its consolidated financial statements. Loans 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 $19.7 million at June 30, 2020 and was reported in Other Assets on the consolidated balance sheets. PCD Loans The Company has purchased loans, some of which have experienced more than insignificant credit deterioration since origination. PCD loans are recorded at the amount paid. An ACL is determined using the same methodology as other loans held for investment. The initial ACL determined on a collective basis is allocated to individual loans. The sum of the loan’s purchase price and ACL becomes its initial amortized cost basis. 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. Subsequent changes to the ACL are recorded through provision expense. Allowance for Credit Losses on Loans The ACLL 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 ACLL 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 enterprise value lending, 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 one- to four-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, cattle, 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 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 a 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. The annual percentage change in gross domestic product is also used in C&I, Construction, Agricultural and Consumer portfolios. The annual percentage change in a commercial real estate index, national house price index and the consumer price index are used in the CRE, 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 six-month 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 that 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.
Available-for-sale Securities	Management systematically evaluates investment securities for other-than-temporary declines in fair value on a quarterly basis. This analysis requires management to consider various factors, which include among other considerations (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 is more likely than not the Company would be required to sell the security before its anticipated recovery in market value. At June 30, 2020 , management performed its quarterly analysis of all securities with an unrealized loss and concluded

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2020
Accounting Policies [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]	The following table illustrates the impact of adoption: ($ in thousands) December 31, 2019 Impact of Adoption January 1, 2020 Assets: Loans $ 5,314,337 $ 7,091 $ 5,321,428 Allowance for credit losses on loans 43,288 28,387 71,675 Allowance for credit losses on held-to-maturity debt securities — 303 303 Deferred tax asset 14,851 5,898 20,749 Liabilities: Reserve for unfunded commitments 430 2,413 2,843 Shareholders’ Equity Retained Earnings 380,737 (18,114 ) 362,623

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2020
Earnings Per Share [Abstract]
Summary of Per Common Share Data and Amounts	The following table presents a summary of per common share data and amounts for the periods indicated. Three months ended June 30, Six months ended June 30, (in thousands, except per share data) 2020 2019 2020 2019 Net income as reported $ 14,634 $ 18,424 $ 27,502 $ 34,580 Weighted average common shares outstanding 26,180 26,887 26,325 25,415 Additional dilutive common stock equivalents 15 53 29 73 Weighted average diluted common shares outstanding 26,195 26,940 26,354 25,488 Basic earnings per common share: $ 0.56 $ 0.69 $ 1.04 $ 1.36 Diluted earnings per common share: 0.56 0.68 $ 1.04 $ 1.36

Investments (Tables)

Investments (Tables)	6 Months Ended
	Jun. 30, 2020
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, allowance of credit losses and fair value of securities available for sale and held to maturity: June 30, 2020 (in thousands) Amortized Cost Gross Gross Allowance for Credit Losses Fair Value Available-for-sale securities: Obligations of U.S. Government-sponsored enterprises $ 9,966 $ 275 $ — $ — $ 10,241 Obligations of states and political subdivisions 245,961 8,450 (133 ) — 254,278 Agency mortgage-backed securities 693,082 27,915 (6 ) — 720,991 U.S. Treasury bills 9,975 591 — — 10,566 Corporate debt securities 2,000 28 — — 2,028 Total securities available for sale $ 960,984 $ 37,259 $ (139 ) $ — $ 998,104 Held-to-maturity securities: Obligations of states and political subdivisions $ 96,547 $ 336 $ (122 ) $ (16 ) $ 96,745 Agency mortgage-backed securities 127,353 2,469 (28 ) — 129,794 Corporate debt securities 122,536 7,693 — (629 ) 129,600 Total securities held-to-maturity $ 346,436 $ 10,498 $ (150 ) $ (645 ) $ 356,139 Less: Allowance for credit losses 645 Total securities held-to-maturity, net $ 345,791 December 31, 2019 (in thousands) Amortized Cost Gross Gross Fair Value Available-for-sale securities: Obligations of U.S. Government-sponsored enterprises $ 9,954 $ 92 $ — $ 10,046 Obligations of states and political subdivisions 207,269 6,118 (363 ) 213,024 Agency mortgage-backed securities 888,129 15,083 (1,191 ) 902,021 U.S. Treasury Bills 9,971 255 — 10,226 Total securities available for sale $ 1,115,323 $ 21,548 $ (1,554 ) $ 1,135,317 Held-to-maturity securities: Obligations of states and political subdivisions $ 11,704 $ 170 $ — $ 11,874 Agency mortgage-backed securities 46,346 675 — 47,021 Corporate debt securities 123,116 128 (200 ) 123,044 Total securities held to maturity $ 181,166 $ 973 $ (200 ) $ 181,939
Schedule of Available-for-sale and Held-to-Maturity Securities Reconciliation	The following table presents the amortized cost, gross unrealized gains and losses, allowance of credit losses and fair value of securities available for sale and held to maturity: June 30, 2020 (in thousands) Amortized Cost Gross Gross Allowance for Credit Losses Fair Value Available-for-sale securities: Obligations of U.S. Government-sponsored enterprises $ 9,966 $ 275 $ — $ — $ 10,241 Obligations of states and political subdivisions 245,961 8,450 (133 ) — 254,278 Agency mortgage-backed securities 693,082 27,915 (6 ) — 720,991 U.S. Treasury bills 9,975 591 — — 10,566 Corporate debt securities 2,000 28 — — 2,028 Total securities available for sale $ 960,984 $ 37,259 $ (139 ) $ — $ 998,104 Held-to-maturity securities: Obligations of states and political subdivisions $ 96,547 $ 336 $ (122 ) $ (16 ) $ 96,745 Agency mortgage-backed securities 127,353 2,469 (28 ) — 129,794 Corporate debt securities 122,536 7,693 — (629 ) 129,600 Total securities held-to-maturity $ 346,436 $ 10,498 $ (150 ) $ (645 ) $ 356,139 Less: Allowance for credit losses 645 Total securities held-to-maturity, net $ 345,791 December 31, 2019 (in thousands) Amortized Cost Gross Gross Fair Value Available-for-sale securities: Obligations of U.S. Government-sponsored enterprises $ 9,954 $ 92 $ — $ 10,046 Obligations of states and political subdivisions 207,269 6,118 (363 ) 213,024 Agency mortgage-backed securities 888,129 15,083 (1,191 ) 902,021 U.S. Treasury Bills 9,971 255 — 10,226 Total securities available for sale $ 1,115,323 $ 21,548 $ (1,554 ) $ 1,135,317 Held-to-maturity securities: Obligations of states and political subdivisions $ 11,704 $ 170 $ — $ 11,874 Agency mortgage-backed securities 46,346 675 — 47,021 Corporate debt securities 123,116 128 (200 ) 123,044 Total securities held to maturity $ 181,166 $ 973 $ (200 ) $ 181,939
Investments Classified by Contractual Maturity Date	The amortized cost and estimated fair value of debt securities at June 30, 2020 , 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. The weighted average life of the mortgage-backed securities is approximately 3 years . Available for sale Held to maturity (in thousands) Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Due in one year or less $ 2,313 $ 2,345 $ — $ — Due after one year through five years 25,981 27,058 10,207 10,597 Due after five years through ten years 9,455 9,915 126,285 133,206 Due after ten years 230,153 237,795 82,591 82,542 Agency mortgage-backed securities 693,082 720,991 127,353 129,794 $ 960,984 $ 998,104 $ 346,436 $ 356,139
Schedule of Unrealized Loss on Investments	The following table represents a summary of available-for-sale investment securities that had an unrealized loss: June 30, 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 states and political subdivisions $ 33,821 $ 133 $ — $ — $ 33,821 $ 133 Agency mortgage-backed securities 8,366 5 66 1 8,432 6 $ 42,187 $ 138 $ 66 $ 1 $ 42,253 $ 139 The following table represents a summary of investment securities that had an unrealized loss: December 31, 2019 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 states and political subdivisions 56,327 363 — — 56,327 363 Agency mortgage-backed securities 131,693 756 41,491 435 173,184 1,191 Corporate debt securities 67,964 200 — — 67,964 200 $ 255,984 $ 1,319 $ 41,491 $ 435 $ 297,475 $ 1,754

Loans (Tables)

Loans (Tables)	6 Months Ended
	Jun. 30, 2020
Non-covered Loans [Line Items]
Summary of Recorded Investment by Risk Category of Portfolio Loans by Portfolio Class and Category	The following table presents the recorded investment on loans based on payment activity: June 30, 2020 (in thousands) Performing Non Performing Total Commercial and industrial $ 11,682 $ 38 $ 11,720 Real estate: Residential 941 — 941 Other 2,376 21 2,397 Total $ 14,999 $ 59 $ 15,058 The recorded investment by risk category of the loans by class at June 30, 2020 , which is based upon the most recent analysis performed is as follows: 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) $ 1,239,062 $ 535,477 $ 318,046 $ 180,269 $ 47,210 $ 85,529 $ 14,954 $ 510,168 $ 2,930,715 Watch (7) 26,347 13,354 4,850 6,468 24,044 175 — 62,293 137,531 Classified (8-9) 3,775 15,068 8,155 3,950 5,093 3,673 295 23,222 63,231 Total Commercial and industrial $ 1,269,184 $ 563,899 $ 331,051 $ 190,687 $ 76,347 $ 89,377 $ 15,249 $ 595,683 $ 3,131,477 Commercial real estate-investor owned Pass (1-6) $ 246,319 $ 321,849 $ 204,242 $ 126,567 $ 153,904 $ 181,761 $ 3,284 $ 35,460 $ 1,273,386 Watch (7) 5,136 4,220 1,192 369 12,681 1,275 — — 24,873 Classified (8-9) — 966 8,286 455 249 1,680 — — 11,636 Total Commercial real estate-investor owned $ 251,455 $ 327,035 $ 213,720 $ 127,391 $ 166,834 $ 184,716 $ 3,284 $ 35,460 $ 1,309,895 Commercial real estate-owner occupied Pass (1-6) $ 147,313 $ 200,519 $ 92,624 $ 79,058 $ 44,990 $ 80,172 $ 2,756 $ 42,883 $ 690,315 Watch (7) 9,473 1,963 261 9,729 8,533 5,074 — 2,500 37,533 Classified (8-9) 601 1,156 4,267 458 — 4,219 — — 10,701 Total Commercial real estate-owner occupied $ 157,387 $ 203,638 $ 97,152 $ 89,245 $ 53,523 $ 89,465 $ 2,756 $ 45,383 $ 738,549 Construction real estate Pass (1-6) $ 75,983 $ 167,936 $ 121,909 $ 37,555 $ 28,060 $ 12,906 $ — $ 20,631 $ 464,980 Watch (7) 2,408 722 1,254 11,047 — 546 — — 15,977 Classified (8-9) — 227 — — — 37 — — 264 Total Construction real estate $ 78,391 $ 168,885 $ 123,163 $ 48,602 $ 28,060 $ 13,489 $ — $ 20,631 $ 481,221 Residential real estate Pass (1-6) $ 26,448 $ 33,085 $ 22,074 $ 19,931 $ 34,427 $ 115,036 $ 591 $ 63,505 $ 315,097 Watch (7) 181 895 842 — — 2,027 279 802 5,026 Classified (8-9) 184 1,265 758 13 213 3,445 — 50 5,928 Total residential real estate $ 26,813 $ 35,245 $ 23,674 $ 19,944 $ 34,640 $ 120,508 $ 870 $ 64,357 $ 326,051 Other Pass (1-6) $ 8,758 $ 25,567 $ 20,615 $ 682 $ 3,705 $ 34,455 $ — $ 43,971 $ 137,753 Watch (7) — 2 — — — — — 1 3 Classified (8-9) — 1 3 4 — 19 10 7 44 Total Other $ 8,758 $ 25,570 $ 20,618 $ 686 $ 3,705 $ 34,474 $ 10 $ 43,979 $ 137,800
Portfolio loans, net
Non-covered Loans [Line Items]
Summary of Portfolio Loans by Category	Below is a summary of loans by category at June 30, 2020 and December 31, 2019 : (in thousands) June 30, 2020 December 31, 2019 Commercial and industrial $ 3,165,611 $ 2,361,157 Real estate: Commercial - investor owned 1,309,895 1,299,884 Commercial - owner occupied 738,549 697,437 Construction and land development 481,221 457,273 Residential 326,992 366,261 Total real estate loans 2,856,657 2,820,855 Other 142,224 134,941 Loans, before unearned loan fees 6,164,492 5,316,953 Unearned loan fees, net (24,441 ) (2,616 ) Loans, including unearned loan fees $ 6,140,051 $ 5,314,337
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 in the ACLL by category for the three and six months ended June 30, 2020 is as follows: (in thousands) Commercial and industrial CRE - investor owned CRE - owner occupied Construction and land development Residential real estate Other Total Allowance for credit losses on loans: Balance at March 31, 2020 $ 45,981 $ 19,892 $ 9,477 $ 9,895 $ 5,395 $ 1,547 $ 92,187 Provision for credit losses 7,168 2,599 1,600 6,038 744 242 18,391 Charge-offs (3,303 ) (224 ) — — (32 ) (105 ) (3,664 ) Recoveries 293 2,752 11 29 226 45 3,356 Balance at June 30, 2020 $ 50,139 $ 25,019 $ 11,088 $ 15,962 $ 6,333 $ 1,729 $ 110,270 (in thousands) Commercial and industrial CRE - investor owned CRE - owner occupied Construction and land development Residential real estate Other Total Allowance for credit losses on loans: Balance at December 31, 2019 $ 27,455 $ 5,935 $ 4,873 $ 2,611 $ 1,280 $ 1,134 $ 43,288 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 at January 1, 2020 $ 33,949 $ 16,656 $ 7,414 $ 7,577 $ 3,349 $ 1,050 $ 69,995 Provision for credit losses 18,759 5,823 3,594 8,347 2,755 808 40,086 Charge-offs (3,366 ) (226 ) — (31 ) (154 ) (191 ) (3,968 ) Recoveries 797 2,766 80 69 383 62 4,157 Balance at June 30, 2020 $ 50,139 $ 25,019 $ 11,088 $ 15,962 $ 6,333 $ 1,729 $ 110,270 Reserves on enterprise value lending and agricultural lending, which are included in the categories above, represented $15.8 million and $2.4 million , respectively.
Financing Receivable, Noncurrent, Allowance for Credit Loss	A summary of the activity in the ACLL by category for the three and six months ended June 30, 2020 is as follows: (in thousands) Commercial and industrial CRE - investor owned CRE - owner occupied Construction and land development Residential real estate Other Total Allowance for credit losses on loans: Balance at March 31, 2020 $ 45,981 $ 19,892 $ 9,477 $ 9,895 $ 5,395 $ 1,547 $ 92,187 Provision for credit losses 7,168 2,599 1,600 6,038 744 242 18,391 Charge-offs (3,303 ) (224 ) — — (32 ) (105 ) (3,664 ) Recoveries 293 2,752 11 29 226 45 3,356 Balance at June 30, 2020 $ 50,139 $ 25,019 $ 11,088 $ 15,962 $ 6,333 $ 1,729 $ 110,270 (in thousands) Commercial and industrial CRE - investor owned CRE - owner occupied Construction and land development Residential real estate Other Total Allowance for credit losses on loans: Balance at December 31, 2019 $ 27,455 $ 5,935 $ 4,873 $ 2,611 $ 1,280 $ 1,134 $ 43,288 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 at January 1, 2020 $ 33,949 $ 16,656 $ 7,414 $ 7,577 $ 3,349 $ 1,050 $ 69,995 Provision for credit losses 18,759 5,823 3,594 8,347 2,755 808 40,086 Charge-offs (3,366 ) (226 ) — (31 ) (154 ) (191 ) (3,968 ) Recoveries 797 2,766 80 69 383 62 4,157 Balance at June 30, 2020 $ 50,139 $ 25,019 $ 11,088 $ 15,962 $ 6,333 $ 1,729 $ 110,270 Reserves on enterprise value lending and agricultural lending, which are included in the categories above, represented $15.8 million and $2.4 million , respectively.
Summary of Portfolio Loans Individually Evaluated for Impairment and Recorded Investment in Impaired Non-Covered Loans by Category	The recorded investment in nonperforming loans by category at June 30, 2020 and December 31, 2019 , is as follows: June 30, 2020 (in thousands) Nonaccrual Restructured, accruing Loans over 90 days past due and still accruing interest Total nonperforming loans Nonaccrual loans with no allowance Commercial and industrial $ 27,431 $ 3,642 $ 865 $ 31,938 $ 20,553 Real estate: Commercial - investor owned 2,389 — — 2,389 1,677 Commercial - owner occupied 2,400 — — 2,400 1,403 Construction and land development 207 — — 207 207 Residential 4,421 78 — 4,499 3,444 Other 19 — 21 40 — Total $ 36,867 $ 3,720 $ 886 $ 41,473 $ 27,284 There was no interest income recognized on nonaccrual loans during the six months ended June 30, 2020. December 31, 2019 (in thousands) Nonaccrual Restructured, accruing Loans over 90 days past due and still accruing interest Total nonperforming loans Commercial and industrial $ 22,328 $ — $ 250 $ 22,578 Real estate: Commercial - investor owned 2,303 — — 2,303 Commercial - owner occupied 213 — — 213 Residential 1,251 79 — 1,330 Other 1 — — 1 Total $ 26,096 $ 79 $ 250 $ 26,425 The following table presents the amortized cost basis of collateral-dependent nonperforming loans by class of loan at June 30, 2020: Type of Collateral (in thousands) Commercial Real Estate Residential Real Estate Blanket Lien Commercial and industrial $ 13,124 $ — $ 4,872 Real estate: Commercial - investor owned 2,389 — — Commercial - owner occupied 1,811 — — Construction and land development — 207 — Residential — 4,271 — Total $ 17,324 $ 4,478 $ 4,872
Summary of Recorded Investment by Category for Portfolio Loans Restructured	The following table presents the amortized cost basis of collateral-dependent nonperforming loans by class of loan at June 30, 2020: Type of Collateral (in thousands) Commercial Real Estate Residential Real Estate Blanket Lien Commercial and industrial $ 13,124 $ — $ 4,872 Real estate: Commercial - investor owned 2,389 — — Commercial - owner occupied 1,811 — — Construction and land development — 207 — Residential — 4,271 — Total $ 17,324 $ 4,478 $ 4,872 There were no troubled debt restructurings that occurred during the three months ended June 30, 2020. The recorded investment by category for troubled debt restructurings that occurred during the six months ended June 30, 2020 and the three and six months ended June 30, 2019 are as follows: June 30, 2020 June 30, 2019 (in thousands, except for number of loans) Number of loans Pre-Modification Outstanding Recorded Balance Post-Modification Outstanding Recorded Balance Number of loans Pre-Modification Outstanding Recorded Balance Post-Modification Outstanding Recorded Balance Commercial and industrial 1 $ 3,731 $ 3,731 — $ — $ — Real estate: Commercial - owner occupied — — — 1 188 188 Residential 2 155 155 2 332 332 Total 3 $ 3,886 $ 3,886 3 $ 520 $ 520
Summary of Recorded Investment by Category for Portfolio Loans Restructured and Subsequently Defaulted	There were no troubled debt restructured loans that subsequently defaulted during the three or six months ended June 30, 2020 or 2019.
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 at June 30, 2020 is shown below. June 30, 2020 (in thousands) 30-89 Days Past Due 90 or More Past Due Total Past Due Current Total Commercial and industrial $ 6,684 $ 22,623 $ 29,307 $ 3,113,890 $ 3,143,197 Real estate: Commercial - investor owned 116 2,095 2,211 1,307,684 1,309,895 Commercial - owner occupied 2,723 1,208 3,931 734,618 738,549 Construction and land development 58 — 58 481,163 481,221 Residential 951 1,738 2,689 324,303 326,992 Other 100 21 121 140,076 140,197 Total $ 10,632 $ 27,685 $ 38,317 $ 6,101,734 $ 6,140,051
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 at June 30, 2020 , which is based upon the most recent analysis performed is as follows: 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) $ 1,239,062 $ 535,477 $ 318,046 $ 180,269 $ 47,210 $ 85,529 $ 14,954 $ 510,168 $ 2,930,715 Watch (7) 26,347 13,354 4,850 6,468 24,044 175 — 62,293 137,531 Classified (8-9) 3,775 15,068 8,155 3,950 5,093 3,673 295 23,222 63,231 Total Commercial and industrial $ 1,269,184 $ 563,899 $ 331,051 $ 190,687 $ 76,347 $ 89,377 $ 15,249 $ 595,683 $ 3,131,477 Commercial real estate-investor owned Pass (1-6) $ 246,319 $ 321,849 $ 204,242 $ 126,567 $ 153,904 $ 181,761 $ 3,284 $ 35,460 $ 1,273,386 Watch (7) 5,136 4,220 1,192 369 12,681 1,275 — — 24,873 Classified (8-9) — 966 8,286 455 249 1,680 — — 11,636 Total Commercial real estate-investor owned $ 251,455 $ 327,035 $ 213,720 $ 127,391 $ 166,834 $ 184,716 $ 3,284 $ 35,460 $ 1,309,895 Commercial real estate-owner occupied Pass (1-6) $ 147,313 $ 200,519 $ 92,624 $ 79,058 $ 44,990 $ 80,172 $ 2,756 $ 42,883 $ 690,315 Watch (7) 9,473 1,963 261 9,729 8,533 5,074 — 2,500 37,533 Classified (8-9) 601 1,156 4,267 458 — 4,219 — — 10,701 Total Commercial real estate-owner occupied $ 157,387 $ 203,638 $ 97,152 $ 89,245 $ 53,523 $ 89,465 $ 2,756 $ 45,383 $ 738,549 Construction real estate Pass (1-6) $ 75,983 $ 167,936 $ 121,909 $ 37,555 $ 28,060 $ 12,906 $ — $ 20,631 $ 464,980 Watch (7) 2,408 722 1,254 11,047 — 546 — — 15,977 Classified (8-9) — 227 — — — 37 — — 264 Total Construction real estate $ 78,391 $ 168,885 $ 123,163 $ 48,602 $ 28,060 $ 13,489 $ — $ 20,631 $ 481,221 Residential real estate Pass (1-6) $ 26,448 $ 33,085 $ 22,074 $ 19,931 $ 34,427 $ 115,036 $ 591 $ 63,505 $ 315,097 Watch (7) 181 895 842 — — 2,027 279 802 5,026 Classified (8-9) 184 1,265 758 13 213 3,445 — 50 5,928 Total residential real estate $ 26,813 $ 35,245 $ 23,674 $ 19,944 $ 34,640 $ 120,508 $ 870 $ 64,357 $ 326,051 Other Pass (1-6) $ 8,758 $ 25,567 $ 20,615 $ 682 $ 3,705 $ 34,455 $ — $ 43,971 $ 137,753 Watch (7) — 2 — — — — — 1 3 Classified (8-9) — 1 3 4 — 19 10 7 44 Total Other $ 8,758 $ 25,570 $ 20,618 $ 686 $ 3,705 $ 34,474 $ 10 $ 43,979 $ 137,800 In the table above, loan originations in 2020 and 2019 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 table presents the recorded investment on loans based on payment activity: June 30, 2020 (in thousands) Performing Non Performing Total Commercial and industrial $ 11,682 $ 38 $ 11,720 Real estate: Residential 941 — 941 Other 2,376 21 2,397 Total $ 14,999 $ 59 $ 15,058 The recorded investment by risk category of loans by class at December 31, 2019 , was as follows: December 31, 2019 (in thousands) Pass (1-6) Watch (7) Classified (8 & 9) Total* Commercial and industrial $ 2,151,084 $ 124,718 $ 70,021 $ 2,345,823 Real estate: Commercial - investor owned 1,242,569 17,572 2,840 1,262,981 Commercial - owner occupied 643,276 28,773 6,473 678,522 Construction and land development 437,134 12,140 106 449,380 Residential 348,246 4,450 2,496 355,192 Other 132,096 3 51 132,150 Total $ 4,954,405 $ 187,656 $ 81,987 $ 5,224,048 *Excludes $90.3 million of loans accounted for as PCI

Commitments (Tables)

Commitments (Tables)	6 Months Ended
	Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Schedule of Commitments	The contractual amounts of off-balance-sheet financial instruments as of June 30, 2020 , and December 31, 2019 , are as follows: (in thousands) June 30, 2020 December 31, 2019 Commitments to extend credit $ 1,659,225 $ 1,469,413 Letters of credit 51,798 47,969

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	Derivative Assets Derivative Liabilities June 30, 2020 December 31, 2019 June 30, 2020 December 31, 2019 (in thousands) Notional Amount Balance Sheet Location Fair Value Notional Amount Balance Sheet Location Fair Value Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives Designated as Hedging Instruments Interest rate swap $ 261,962 Other Assets $ — $ 61,962 Other Assets $ — Other Liabilities $ 10,840 Other Liabilities $ 2,872 Total $ — $ — $ 10,840 $ 2,872 Derivatives not Designated as Hedging Instruments Interest rate swap $ 1,021,528 Other Assets $ 35,728 $ 749,819 Other Assets $ 11,055 Other Liabilities $ 35,988 Other Liabilities $ 11,875 Total $ 35,728 $ 11,055 $ 35,988 $ 11,875 The table below presents a gross presentation, the effects of offsetting, and a net presentation of the Company’s financial instruments that are subject to offsetting as of June 30, 2020 and December 31, 2019 . 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 June 30, 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 swap $ 35,728 $ — $ 35,728 $ 14 $ — $ 35,714 Liabilities: Interest rate swap $ 46,828 $ — $ 46,828 $ 14 $ 46,222 $ 592 Securities sold under agreements to repurchase 196,532 — 196,532 — 196,532 — As of December 31, 2019 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 swap $ 11,055 $ — $ 11,055 $ 56 $ — $ 10,999 Liabilities: Interest rate swap $ 14,747 $ — $ 14,747 $ 56 $ 14,573 $ 118 Securities sold under agreements to repurchase 230,886 — 230,886 — 230,886 —

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2020
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 June 30, 2020 and December 31, 2019 , segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value: June 30, 2020 (in thousands) Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Fair Value Assets Securities available for sale Obligations of U.S. Government-sponsored enterprises $ — $ 10,241 $ — $ 10,241 Obligations of states and political subdivisions — 254,278 — 254,278 Agency mortgage-backed securities — 720,991 — 720,991 U.S. Treasury bills — 10,566 — 10,566 Corporate debt securities — 2,028 — 2,028 Total securities available for sale — 998,104 — 998,104 Derivatives — 35,728 — 35,728 Total assets $ — $ 1,033,832 $ — $ 1,033,832 Liabilities Derivatives $ — $ 46,828 $ — $ 46,828 Total liabilities $ — $ 46,828 $ — $ 46,828 December 31, 2019 (in thousands) Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Fair Value Assets Securities available for sale Obligations of U.S. Government-sponsored enterprises $ — $ 10,046 $ — $ 10,046 Obligations of states and political subdivisions — 213,024 — 213,024 Residential mortgage-backed securities — 902,021 — 902,021 U.S. Treasury bills — 10,226 — 10,226 Total securities available-for-sale — 1,135,317 — 1,135,317 Derivative financial instruments — 11,055 — 11,055 Total assets $ — $ 1,146,372 $ — $ 1,146,372 Liabilities Derivatives $ — $ 14,747 $ — $ 14,747 Total liabilities $ — $ 14,747 $ — $ 14,747
Summary of Financial Instruments and Non-Financial Assets Measured at Fair Value on a Non-Recurring Basis	(1) (1) (1) (1) (in thousands) Total Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant (Level 3) Total losses for the three Total losses for the six months ended June 30, 2020 Impaired loans $ 3,627 $ — $ — $ 3,627 $ 3,219 $ 3,230 Other real estate 3,899 — — 3,899 79 777 Total $ 7,526 $ — $ — $ 7,526 $ 3,298 $ 4,007 (1) The amounts represent only 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 June 30, 2020 and December 31, 2019 . June 30, 2020 December 31, 2019 (in thousands) Carrying Amount Estimated fair value Level Carrying Amount Estimated fair value Level Balance sheet assets Securities held-to-maturity, net 345,791 356,139 Level 2 181,166 181,939 Level 2 Other investments 43,106 43,106 Level 2 38,044 38,044 Level 2 Loans held for sale 16,029 16,029 Level 2 5,570 5,570 Level 2 Loans, net 6,029,781 5,876,000 Level 3 5,271,049 5,205,651 Level 3 State tax credits, held for sale 38,820 44,164 Level 3 36,802 39,046 Level 3 Balance sheet liabilities Certificates of deposit 659,166 665,374 Level 3 826,447 825,203 Level 3 Subordinated debentures and notes 203,384 192,852 Level 2 141,258 130,985 Level 2 FHLB advances 250,000 251,978 Level 2 222,406 221,402 Level 2 Other borrowings and notes payable 227,961 227,961 Level 2 265,172 265,172 Level 2

Subordinated Debentures (Tables

Subordinated Debentures (Tables)	6 Months Ended
	Jun. 30, 2020
Subordinated Borrowings [Abstract]
Schedule of Subordinated Debentures	The amounts and terms of each issuance of the Company’s subordinated debentures at June 30, 2020 and December 31, 2019 were as follows: Amount Maturity Date Initial Call Date (1) Interest Rate (in thousands) June 30, 2020 December 31, 2019 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) 7,819 7,886 February 22, 2031 February 22, 2011 Fixed 10.20% JEFFCO Stat Trust II (2) 4,415 4,388 March 17, 2034 March 17, 2009 Floats 3MO LIBOR + 2.75% Trinity Capital Trust III (2) 5,239 5,206 September 8, 2034 September 8, 2009 Floats 3MO LIBOR + 2.70% Trinity Capital Trust IV (2) 10,310 10,302 November 23, 2035 August 23, 2010 Fixed 6.88% Trinity Capital Trust V (2) 7,625 7,543 December 15, 2036 September 15, 2011 Floats 3MO LIBOR + 1.65% Total junior subordinated debentures 92,215 92,132 5.75% Fixed-to-floating rate subordinated notes 63,250 — June 1, 2030 June 1, 2025 Fixed 5.75% until 4.75% Fixed-to-floating rate subordinated notes 50,000 50,000 November 1, 2026 November 1, 2021 Fixed 4.75% until Debt issuance costs (2,081 ) (874 ) Total fixed-to-floating rate subordinated notes 111,169 49,126 Total subordinated debentures and notes $ 203,384 $ 141,258 (1) Callable each quarter after initial call date. (2) Purchase accounting adjustments are reflected in the balance and also impact the effective interest rate.

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2020
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table presents the changes in accumulated other comprehensive income 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, March 31, 2020 $ 25,538 $ 4,778 $ (7,219 ) $ 23,097 Net change 10,984 (329 ) (943 ) 9,712 Transfer from available-for-sale to held-to-maturity $ (8,650 ) $ 8,650 $ — $ — Balance, June 30, 2020 $ 27,872 $ 13,099 $ (8,162 ) $ 32,809 Balance, December 31, 2019 $ 14,977 $ 4,934 $ (2,162 ) $ 17,749 Net change 21,545 (485 ) (6,000 ) 15,060 Transfer from available-for-sale to held-to-maturity $ (8,650 ) $ 8,650 $ — $ — Balance, June 30, 2020 $ 27,872 $ 13,099 $ (8,162 ) $ 32,809 (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, March 31, 2019 $ 2,675 $ (233 ) $ (952 ) $ 1,490 Net change 12,842 3 (1,261 ) 11,584 Balance, June 30, 2019 $ 15,517 $ (230 ) $ (2,213 ) $ 13,074 Balance, December 31, 2018 $ (9,047 ) $ (235 ) $ — $ (9,282 ) Net change 24,564 5 (2,213 ) 22,356 Balance, June 30, 2019 $ 15,517 $ (230 ) $ (2,213 ) $ 13,074
Schedule of Pre-tax and After-tax Changes in the Components of Other Comprehensive Income	The following table presents the pre-tax and after-tax changes in the components of other comprehensive income: Three months ended June 30, (in thousands) 2020 2019 Pre-tax Tax effect After-tax Pre-tax Tax effect After-tax Change in unrealized gain on available-for-sale debt securities $ 14,587 $ 3,603 $ 10,984 $ 17,054 $ 4,212 $ 12,842 Reclassification of (gain) loss on held-to-maturity securities (b) (437 ) (108 ) (329 ) 4 1 3 Change in unrealized loss on cash flow hedges arising during the period (1,563 ) (386 ) (1,177 ) (1,679 ) (414 ) (1,265 ) Reclassification of loss on cash flow hedges (b) 311 77 234 5 1 4 Total other comprehensive income $ 12,898 $ 3,186 $ 9,712 $ 15,384 $ 3,800 $ 11,584 Six months ended June 30, 2020 2019 Pre-tax Tax effect After-tax Pre-tax Tax effect After-tax Change in unrealized gain on available-for-sale debt securities $ 28,616 $ 7,068 $ 21,548 $ 32,329 $ 7,985 $ 24,344 Reclassification adjustment for realized (gain) loss on sale of available-for-sale debt securities (a) (4 ) (1 ) (3 ) 292 72 220 Reclassification of (gain) loss on held-to-maturity securities (b) (644 ) (159 ) (485 ) 7 2 5 Change in unrealized loss on cash flow hedges arising during the period (8,442 ) (2,085 ) (6,357 ) (2,944 ) (727 ) (2,217 ) Reclassification of loss on cash flow hedges (b) 474 117 357 5 1 4 Total other comprehensive income $ 20,000 $ 4,940 $ 15,060 $ 29,689 $ 7,333 $ 22,356 (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

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Details) $ in Millions	Jun. 30, 2020USD ($)
Other Assets
Property, Plant and Equipment [Line Items]
Accrued interest receivable	$ 19.7

Summary of Significant Accoun_5

Summary of Significant Accounting Policies Schedule of Impact of Adoption of New Accounting Standard (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, allowance for credit loss		$ 43,288
Allowance for credit losses on held-to-maturity debt securities	$ (645)	0
Deferred tax asset		14,851
Retained earnings	$ 380,667	380,737	$ 380,737
Loans Receivable
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, allowance for credit loss		5,314,337
Unfunded Loan Commitment
Financing Receivable, Credit Quality Indicator [Line Items]
Reserve for unfunded commitments		430
Cumulative Effect, Period Of Adoption, Adjustment
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, allowance for credit loss		28,387
Allowance for credit losses on held-to-maturity debt securities		303
Deferred tax asset		5,898
Retained earnings		(18,114)
Cumulative Effect, Period Of Adoption, Adjustment | Loans Receivable
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, allowance for credit loss		7,091
Cumulative Effect, Period Of Adoption, Adjustment | Unfunded Loan Commitment
Financing Receivable, Credit Quality Indicator [Line Items]
Reserve for unfunded commitments		2,413
Cumulative Effect, Period Of Adoption, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, allowance for credit loss		71,675
Allowance for credit losses on held-to-maturity debt securities		303
Deferred tax asset		20,749
Retained earnings		362,623
Cumulative Effect, Period Of Adoption, Adjusted Balance | Loans Receivable
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, allowance for credit loss		5,321,428
Cumulative Effect, Period Of Adoption, Adjusted Balance | Unfunded Loan Commitment
Financing Receivable, Credit Quality Indicator [Line Items]
Reserve for unfunded commitments		2,843
Accounting Standards Update 2016-13 | Cumulative Effect, Period Of Adoption, Adjustment
Financing Receivable, Credit Quality Indicator [Line Items]
Retained earnings		$ 18,100

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net income as reported	$ 14,634	$ 18,424	$ 27,502	$ 34,580
Weighted average common shares outstanding (in shares)	26,180,000	26,887,000	26,325,000	25,415,000
Additional dilutive common stock equivalents (in shares)	15,000	53,000	29,000	73,000
Weighted average diluted common shares outstanding (in shares)	26,195,000	26,940,000	26,354,000	25,488,000
Basic earnings per common share (in dollars per share)	$ 0.56	$ 0.69	$ 1.04	$ 1.36
Diluted earnings per common share (in dollars per share)	$ 0.56	$ 0.68	$ 1.04	$ 1.36
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	157,000	130,000	147,000	99,000

Investments - Schedule of Avail

Investments - Schedule of Available-for-sale and Held-to-Maturity Securities Reconciliation (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	$ 346,436		$ 181,166
Gross Unrealized Gains	10,498		973
Gross Unrealized Losses	(150)		(200)
Allowance for Credit Losses	645	$ 0
Fair Value	356,139		181,939
Total securities held-to-maturity, net	345,791		181,166
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	960,984		1,115,323
Gross Unrealized Gains	37,259		21,548
Gross Unrealized Losses	(139)		(1,554)
Allowance for Credit Losses	0
Fair Value	998,104		1,135,317
Obligations of U.S. Government-sponsored enterprises
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	9,966		9,954
Gross Unrealized Gains	275		92
Gross Unrealized Losses	0		0
Allowance for Credit Losses	0
Fair Value	10,241		10,046
Obligations of states and political subdivisions
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	96,547		11,704
Gross Unrealized Gains	336		170
Gross Unrealized Losses	(122)		0
Allowance for Credit Losses	16
Fair Value	96,745		11,874
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	245,961		207,269
Gross Unrealized Gains	8,450		6,118
Gross Unrealized Losses	(133)		(363)
Allowance for Credit Losses	0
Fair Value	254,278		213,024
Agency mortgage-backed securities
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	127,353		46,346
Gross Unrealized Gains	2,469		675
Gross Unrealized Losses	(28)		0
Allowance for Credit Losses	0
Fair Value	129,794		47,021
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	693,082		888,129
Gross Unrealized Gains	27,915		15,083
Gross Unrealized Losses	(6)		(1,191)
Allowance for Credit Losses	0
Fair Value	720,991		902,021
US Treasury Bill Securities [Member]
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	9,975		9,971
Gross Unrealized Gains	591		255
Gross Unrealized Losses	0		0
Allowance for Credit Losses	0
Fair Value	10,566		10,226
Corporate Debt Securities [Member]
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	122,536		123,116
Gross Unrealized Gains	7,693		128
Gross Unrealized Losses	0		(200)
Allowance for Credit Losses	629
Fair Value	129,600		$ 123,044
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	2,000
Gross Unrealized Gains	28
Gross Unrealized Losses	0
Fair Value	$ 2,028

Investments - Investments Class

Investments - Investments Classified by Contractual Maturity Date (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Available for sale, Amortized Cost
Due in one year or less	$ 2,313
Due after one year through five years	25,981
Due after five years through ten years	9,455
Due after ten years	230,153
Agency mortgage-backed securities	693,082
Amortized Cost	960,984	$ 1,115,323
Available for sale, Estimated Fair Value
Due in one year or less	2,345
Due after one year through five years	27,058
Due after five years through ten years	9,915
Due after ten years	237,795
Agency mortgage-backed securities	720,991
Available for sale, fair value	998,104	1,135,317
Held to maturity, Amortized Cost
Due in one year or less	0
Due after one year through five years	10,207
Due after five years through ten years	126,285
Due after ten years	82,591
Agency mortgage-backed securities	127,353
Amortized Cost	346,436	181,166
Held to maturity, Estimated Fair Value
Due in one year or less	0
Due after one year through five years	10,597
Due after five years through ten years	133,206
Due after ten years	82,542
Agency mortgage-backed securities	129,794
Held to maturity, fair value	$ 356,139	$ 181,939

Investments - Schedule of Unrea

Investments - Schedule of Unrealized Loss on Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 42,187	$ 255,984
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	138	1,319
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	66	41,491
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	1	435
Debt Securities, Available-for-sale, Unrealized Loss Position	42,253	297,475
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	139	1,754
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	33,821	56,327
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	133	363
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position	33,821	56,327
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	133	363
Agency mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	8,366	131,693
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	5	756
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	66	41,491
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	1	435
Debt Securities, Available-for-sale, Unrealized Loss Position	8,432	173,184
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 6	1,191
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months		67,964
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		200
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		67,964
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		$ 200

Investments - Narrative (Detail

Investments - Narrative (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 960,984		$ 1,115,323
Securities available for sale	998,104		$ 1,135,317
accumulated other comprehensive income loss available for sale securities adjustment pre tax	$ 11,500
Maximum percentage of shareholders' equity security holdings held of one issuer	10.00%		10.00%
Securities pledged	$ 449,900		$ 484,800
Mortgage-backed securities, weighted average life	3 years
Accrued interest receivable, available-for-sale securities	$ 3,600
Accrued interest receivable, held-to-maturity securities	2,300
Allowance for credit losses on held-to-maturity debt securities	645	$ 0
Reclassified to Held to Maturity [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	163,600
Securities available for sale	$ 175,100

Loans - Summary of Portfolio Lo

Loans - Summary of Portfolio Loans by Category (Details) - Portfolio loans, net - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	$ 6,164,492	$ 5,316,953
Unearned loan fees, net	(24,441)	(2,616)
Loans, including unearned loan fees	6,140,051	5,314,337
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	3,165,611	2,361,157
Loans, including unearned loan fees	3,143,197
Commercial - investor owned
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	1,309,895	1,299,884
Loans, including unearned loan fees	1,309,895
Commercial - owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	738,549	697,437
Loans, including unearned loan fees	738,549
Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	481,221	457,273
Loans, including unearned loan fees	481,221
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	326,992	366,261
Loans, including unearned loan fees	326,992
Total real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	2,856,657	2,820,855
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	142,224	$ 134,941
Loans, including unearned loan fees	$ 140,197

Loans - Summary of Allowance fo

Loans - Summary of Allowance for Loan Losses by Portfolio Class and Category (Details) - USD ($) $ in Thousands	Jan. 01, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Allowance for Loan Losses [Roll Forward]
Balance	$ 43,288
Portfolio loans, net
Allowance for Loan Losses [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	28,387
Provision for Loan, Lease, and Other Losses		$ 18,391		$ 40,086
Balance at December 31, 2019	43,288	92,187		43,288
Provision for credit losses	(1,680)	18,400	$ 1,700	40,100	$ 3,200
Charge-offs		(3,664)		(3,968)
Recoveries		3,356		4,157
Balance	69,995	110,270		110,270
Portfolio loans, net | Commercial and industrial
Allowance for Loan Losses [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	6,494
Provision for Loan, Lease, and Other Losses		7,168		18,759
Balance at December 31, 2019	27,455	45,981		27,455
Provision for credit losses	0
Charge-offs		(3,303)		(3,366)
Recoveries		293		797
Balance	33,949	50,139		50,139
Portfolio loans, net | CRE - investor owned
Allowance for Loan Losses [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	10,726
Provision for Loan, Lease, and Other Losses		2,599		5,823
Balance at December 31, 2019	5,935	19,892		5,935
Provision for credit losses	(5)
Charge-offs		(224)		(226)
Recoveries		2,752		2,766
Balance	16,656	25,019		25,019
Portfolio loans, net | CRE - owner occupied
Allowance for Loan Losses [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	2,598
Provision for Loan, Lease, and Other Losses		1,600		3,594
Balance at December 31, 2019	4,873	9,477		4,873
Provision for credit losses	(57)
Charge-offs		0		0
Recoveries		11		80
Balance	7,414	11,088		11,088
Portfolio loans, net | Construction and land development
Allowance for Loan Losses [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	5,183
Provision for Loan, Lease, and Other Losses		6,038		8,347
Balance at December 31, 2019	2,611	9,895		2,611
Provision for credit losses	(217)
Charge-offs		0		(31)
Recoveries		29		69
Balance	7,577	15,962		15,962
Portfolio loans, net | Residential real estate
Allowance for Loan Losses [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	3,470
Provision for Loan, Lease, and Other Losses		744		2,755
Balance at December 31, 2019	1,280	5,395		1,280
Provision for credit losses	(1,401)
Charge-offs		(32)		(154)
Recoveries		226		383
Balance	3,349	6,333		6,333
Portfolio loans, net | Other
Allowance for Loan Losses [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(84)
Provision for Loan, Lease, and Other Losses		242		808
Balance at December 31, 2019	1,134	1,547		1,134
Provision for credit losses	0
Charge-offs		(105)		(191)
Recoveries		45		62
Balance	$ 1,050	$ 1,729		$ 1,729

Loans - Summary of Recorded Inv

Loans - Summary of Recorded Investment in Portfolio Loans by Class and Category Based on Impairment Method (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020USD ($)loan	Jun. 30, 2019USD ($)loan	Mar. 31, 2020USD ($)	Jan. 01, 2020USD ($)	Dec. 31, 2019USD ($)
Summary of Recorded Investment in Non-covered Loans by Portfolio Class and Category Based on Impairment Method [Line Items]
Total				$ 43,288
Portfolio loans, net
Summary of Recorded Investment in Non-covered Loans by Portfolio Class and Category Based on Impairment Method [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan	3	3
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 3,886	$ 520
Financing Receivable, Troubled Debt Restructuring, Premodification	3,886	$ 520
Total	110,270		$ 92,187	69,995	$ 43,288
Loans - Ending balance:
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums	(24,441)				(2,616)
Total	$ 6,164,492				5,316,953
Portfolio loans, net | Commercial and industrial
Summary of Recorded Investment in Non-covered Loans by Portfolio Class and Category Based on Impairment Method [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan	1	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 3,731	$ 0
Financing Receivable, Troubled Debt Restructuring, Premodification	3,731	$ 0
Total	50,139		45,981	33,949	27,455
Loans - Ending balance:
Total	3,165,611				2,361,157
Portfolio loans, net | CRE - investor owned
Summary of Recorded Investment in Non-covered Loans by Portfolio Class and Category Based on Impairment Method [Line Items]
Total	25,019		19,892	16,656	5,935
Loans - Ending balance:
Total	$ 1,309,895				1,299,884
Portfolio loans, net | CRE - owner occupied
Summary of Recorded Investment in Non-covered Loans by Portfolio Class and Category Based on Impairment Method [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan	0	1
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 188
Financing Receivable, Troubled Debt Restructuring, Premodification	0	$ 188
Total	11,088		9,477	7,414	4,873
Loans - Ending balance:
Total	738,549				697,437
Portfolio loans, net | Construction and land development
Summary of Recorded Investment in Non-covered Loans by Portfolio Class and Category Based on Impairment Method [Line Items]
Total	15,962		9,895	7,577	2,611
Loans - Ending balance:
Total	$ 481,221				457,273
Portfolio loans, net | Residential real estate
Summary of Recorded Investment in Non-covered Loans by Portfolio Class and Category Based on Impairment Method [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan	2	2
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 155	$ 332
Financing Receivable, Troubled Debt Restructuring, Premodification	155	$ 332
Total	6,333		5,395	3,349	1,280
Loans - Ending balance:
Total	326,992				366,261
Portfolio loans, net | Other
Summary of Recorded Investment in Non-covered Loans by Portfolio Class and Category Based on Impairment Method [Line Items]
Total	1,729		$ 1,547	$ 1,050	1,134
Loans - Ending balance:
Total	$ 142,224				$ 134,941

Loans - Summary of Portfolio _2

Loans - Summary of Portfolio Loans Individually Evaluated for Impairment by Category (Details) - USD ($) $ in Thousands	Jan. 01, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Impaired [Line Items]
Financing receivable, allowance for credit loss	$ 43,288
Portfolio loans, net
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance		$ 27,284		$ 27,284
Total Recorded Investment		41,473		41,473			$ 26,425
Financing Receivable, Allowance for Credit Loss, Writeoff		(3,664)		(3,968)
Financing Receivable, Allowance for Credit Loss, Recovery		3,356		4,157
Financing receivable, allowance for credit loss	69,995	110,270		110,270		$ 92,187	43,288
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	28,387
Provision for credit losses	1,680	(18,400)	$ (1,700)	(40,100)	$ (3,200)
Portfolio loans, net | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance		20,553		20,553
Total Recorded Investment		31,938		31,938			22,578
Financing Receivable, Allowance for Credit Loss, Writeoff		(3,303)		(3,366)
Financing Receivable, Allowance for Credit Loss, Recovery		293		797
Financing receivable, allowance for credit loss	33,949	50,139		50,139		45,981	27,455
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	6,494
Provision for credit losses	0
Portfolio loans, net | Commercial - investor owned
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance		1,677		1,677
Total Recorded Investment		2,389		2,389			2,303
Financing Receivable, Allowance for Credit Loss, Writeoff		(224)		(226)
Financing Receivable, Allowance for Credit Loss, Recovery		2,752		2,766
Financing receivable, allowance for credit loss	16,656	25,019		25,019		19,892	5,935
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	10,726
Provision for credit losses	5
Portfolio loans, net | Commercial - owner occupied
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance		1,403		1,403
Total Recorded Investment		2,400		2,400			213
Financing Receivable, Allowance for Credit Loss, Writeoff		0		0
Financing Receivable, Allowance for Credit Loss, Recovery		11		80
Financing receivable, allowance for credit loss	7,414	11,088		11,088		9,477	4,873
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	2,598
Provision for credit losses	57
Portfolio loans, net | Construction and land development
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance		207		207
Total Recorded Investment		207		207
Financing Receivable, Allowance for Credit Loss, Writeoff		0		(31)
Financing Receivable, Allowance for Credit Loss, Recovery		29		69
Financing receivable, allowance for credit loss	7,577	15,962		15,962		9,895	2,611
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	5,183
Provision for credit losses	217
Portfolio loans, net | Residential real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance		3,444		3,444
Total Recorded Investment		4,499		4,499			1,330
Financing Receivable, Allowance for Credit Loss, Writeoff		(32)		(154)
Financing Receivable, Allowance for Credit Loss, Recovery		226		383
Financing receivable, allowance for credit loss	3,349	6,333		6,333		5,395	1,280
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	3,470
Provision for credit losses	1,401
Portfolio loans, net | Other
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance		0		0
Total Recorded Investment		40		40			1
Financing Receivable, Allowance for Credit Loss, Writeoff		(105)		(191)
Financing Receivable, Allowance for Credit Loss, Recovery		45		62
Financing receivable, allowance for credit loss	1,050	$ 1,729		$ 1,729		$ 1,547	$ 1,134
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(84)
Provision for credit losses	$ 0

Loans - Narrative (Details)

Loans - Narrative (Details)	Jan. 01, 2020USD ($)	Jun. 30, 2020USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2020USD ($)loan	Jun. 30, 2019USD ($)loan	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Purchased with Credit Deterioration, Discount (Premium)				$ 22,200,000
Number of loans over 90 days past due and still accruing interest | loan							0
Unadvanced commitments on impaired loans							$ 225,000
Financing Receivable, Amount Eligible for Deferred Payment		$ 685,700,000		685,700,000
Financing Receivable, Amount Eligible for Deferral of Both Principal and Interest		361,400,000		361,400,000
Financing Receivable, Amount Eligible for Deferral of Principal Only		324,300,000		324,300,000
Loans and Leases Receivable, Deferred Income		4,000,000		4,000,000
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available		2,400,000,000		2,400,000,000
Financing receivable, allowance for credit loss	$ 43,288,000
Financing Receivable, Paycheck Protection Program		830,200,000		830,200,000
Financing Receivable, Paycheck Protection Program, Net of Deferred Fees		807,800,000		807,800,000
Financing Receivable, Paycheck Protection Program, Unearned Fees		22,400,000		22,400,000
Unadvanced Commitment on Impaired Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Estimated losses attributable to unadvanced commitments on impaired loans		4,900,000		4,900,000			400,000
Non-Covered Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	28,387,000
Provision for credit losses	(1,680,000)	18,400,000	$ 1,700,000	40,100,000	$ 3,200,000
Financing Receivable, Allowance for Credit Loss, Threshold of Loans Written Off	100,000
Post-Modification Outstanding Recorded Balance				$ 3,886,000	$ 520,000
Financing Receivable, Modifications, Number of Contracts | loan				3	3
Restructuring Reserve		3,720,000		$ 3,720,000			79,000
Financing Receivable, before Allowance for Credit Loss		6,164,492,000		6,164,492,000			5,316,953,000
Financing receivable, allowance for credit loss	69,995,000	110,270,000		110,270,000		$ 92,187,000	43,288,000
Non-Covered Loans | Enterprise Value Lending Portfolio Niche Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, allowance for credit loss		15,800,000		15,800,000
Non-Covered Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(84,000)
Provision for credit losses	0
Restructuring Reserve		0		0			0
Financing Receivable, before Allowance for Credit Loss		142,224,000		142,224,000			134,941,000
Financing receivable, allowance for credit loss	1,050,000	1,729,000		1,729,000		$ 1,547,000	1,134,000
Non-Covered Loans | Agriculture Portfolio Niche Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, allowance for credit loss		2,400,000		2,400,000
Financial Asset Acquired with Credit Deterioration [Member] | Non-Covered Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss							$ 90,300,000
Cumulative Effect, Period Of Adoption, Adjustment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, allowance for credit loss	$ 28,387,000
Cumulative Effect, Period Of Adoption, Adjustment | Non-Covered Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, allowance for credit loss		$ 1,000,000		$ 1,000,000

Loans - Summary of Recorded I_2

Loans - Summary of Recorded Investment in Impaired Portfolio Loans by Category (Details) - Non-Covered Loans $ in Thousands	6 Months Ended
	Jun. 30, 2020USD ($)loan	Jun. 30, 2019loan	Dec. 31, 2019USD ($)
Financing Receivable, Past Due [Line Items]
Total Recorded Investment	$ 41,473		$ 26,425
Recorded Investment With No Allowance	$ 27,284
Financing Receivable, Modifications, Number of Contracts | loan	3	3
Nonaccrual	$ 36,867		26,096
Restructured, accruing	3,720		79
Impaired Financing Receivables, Recorded Investment, 90 Days Past Due and Still Accruing	886		250
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Recorded Investment	31,938		22,578
Recorded Investment With No Allowance	$ 20,553
Financing Receivable, Modifications, Number of Contracts | loan	1	0
Nonaccrual	$ 27,431		22,328
Restructured, accruing	3,642		0
Impaired Financing Receivables, Recorded Investment, 90 Days Past Due and Still Accruing	865		250
Commercial - investor owned
Financing Receivable, Past Due [Line Items]
Total Recorded Investment	2,389		2,303
Recorded Investment With No Allowance	1,677
Nonaccrual	2,389		2,303
Restructured, accruing	0		0
Impaired Financing Receivables, Recorded Investment, 90 Days Past Due and Still Accruing	0		0
Commercial - owner occupied
Financing Receivable, Past Due [Line Items]
Total Recorded Investment	2,400		213
Recorded Investment With No Allowance	$ 1,403
Financing Receivable, Modifications, Number of Contracts | loan	0	1
Nonaccrual	$ 2,400		213
Restructured, accruing	0		0
Impaired Financing Receivables, Recorded Investment, 90 Days Past Due and Still Accruing	0		0
Construction and land development
Financing Receivable, Past Due [Line Items]
Total Recorded Investment	207
Recorded Investment With No Allowance	207
Nonaccrual	207
Restructured, accruing	0
Impaired Financing Receivables, Recorded Investment, 90 Days Past Due and Still Accruing	0
Residential real estate
Financing Receivable, Past Due [Line Items]
Total Recorded Investment	4,499		1,330
Recorded Investment With No Allowance	$ 3,444
Financing Receivable, Modifications, Number of Contracts | loan	2	2
Nonaccrual	$ 4,421		1,251
Restructured, accruing	78		79
Impaired Financing Receivables, Recorded Investment, 90 Days Past Due and Still Accruing	0		0
Other
Financing Receivable, Past Due [Line Items]
Total Recorded Investment	40		1
Recorded Investment With No Allowance	0
Nonaccrual	19		1
Restructured, accruing	0		0
Impaired Financing Receivables, Recorded Investment, 90 Days Past Due and Still Accruing	$ 21		$ 0

Loans - Summary of Recorded I_3

Loans - Summary of Recorded Investment by Category for Portfolio Loans Restructured (Details) - Non-Covered Loans $ in Thousands	6 Months Ended
	Jun. 30, 2020USD ($)loan	Jun. 30, 2019USD ($)loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	3	3
Pre-Modification Outstanding Recorded Balance	$ 3,886	$ 520
Post-Modification Outstanding Recorded Balance	$ 3,886	$ 520
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	1	0
Pre-Modification Outstanding Recorded Balance	$ 3,731	$ 0
Post-Modification Outstanding Recorded Balance	$ 3,731	$ 0
CRE - owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	1
Pre-Modification Outstanding Recorded Balance	$ 0	$ 188
Post-Modification Outstanding Recorded Balance	$ 0	$ 188
Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	2	2
Pre-Modification Outstanding Recorded Balance	$ 155	$ 332
Post-Modification Outstanding Recorded Balance	$ 155	$ 332

Loans - Summary of Aging of Rec

Loans - Summary of Aging of Recorded Investment in Past Due Portfolio Loans by Portfolio Class and Category (Details) - Non-Covered Loans - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Total Past Due	$ 38,317
Current	6,101,734
Loans, including unearned loan fees	6,140,051	$ 5,314,337
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Past Due	29,307
Current	3,113,890
Loans, including unearned loan fees	3,143,197
CRE - investor owned
Financing Receivable, Past Due [Line Items]
Total Past Due	2,211
Current	1,307,684
Loans, including unearned loan fees	1,309,895
CRE - owner occupied
Financing Receivable, Past Due [Line Items]
Total Past Due	3,931
Current	734,618
Loans, including unearned loan fees	738,549
Construction and land development
Financing Receivable, Past Due [Line Items]
Total Past Due	58
Current	481,163
Loans, including unearned loan fees	481,221
Residential real estate
Financing Receivable, Past Due [Line Items]
Total Past Due	2,689
Current	324,303
Loans, including unearned loan fees	326,992
Other
Financing Receivable, Past Due [Line Items]
Total Past Due	121
Current	140,076
Loans, including unearned loan fees	140,197
Financial Asset, 30 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due	10,632
Financial Asset, 30 to 89 Days Past Due [Member] | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Past Due	6,684
Financial Asset, 30 to 89 Days Past Due [Member] | CRE - investor owned
Financing Receivable, Past Due [Line Items]
Total Past Due	116
Financial Asset, 30 to 89 Days Past Due [Member] | CRE - owner occupied
Financing Receivable, Past Due [Line Items]
Total Past Due	2,723
Financial Asset, 30 to 89 Days Past Due [Member] | Construction and land development
Financing Receivable, Past Due [Line Items]
Total Past Due	58
Financial Asset, 30 to 89 Days Past Due [Member] | Residential real estate
Financing Receivable, Past Due [Line Items]
Total Past Due	951
Financial Asset, 30 to 89 Days Past Due [Member] | Other
Financing Receivable, Past Due [Line Items]
Total Past Due	100
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due	27,685
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Past Due	22,623
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | CRE - investor owned
Financing Receivable, Past Due [Line Items]
Total Past Due	2,095
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | CRE - owner occupied
Financing Receivable, Past Due [Line Items]
Total Past Due	1,208
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction and land development
Financing Receivable, Past Due [Line Items]
Total Past Due	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential real estate
Financing Receivable, Past Due [Line Items]
Total Past Due	1,738
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Other
Financing Receivable, Past Due [Line Items]
Total Past Due	$ 21

Loans - Summary of Term Loans b

Loans - Summary of Term Loans by Origination Year (Details) $ in Thousands	Jun. 30, 2020USD ($)
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
2020	$ 1,269,184
2019	563,899
2018	331,051
2017	190,687
2016	76,347
Prior	89,377
Financing Receivable, Converted	15,249
Revolving Loans	595,683
Total	3,131,477
Commercial and industrial | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,239,062
2019	535,477
2018	318,046
2017	180,269
2016	47,210
Prior	85,529
Financing Receivable, Converted	14,954
Revolving Loans	510,168
Total	2,930,715
Commercial and industrial | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	26,347
2019	13,354
2018	4,850
2017	6,468
2016	24,044
Prior	175
Financing Receivable, Converted	0
Revolving Loans	62,293
Total	137,531
Commercial and industrial | Classified (8 & 9)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	3,775
2019	15,068
2018	8,155
2017	3,950
2016	5,093
Prior	3,673
Financing Receivable, Converted	295
Revolving Loans	23,222
Total	63,231
Commercial Real Estate-Investor Owned Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	251,455
2019	327,035
2018	213,720
2017	127,391
2016	166,834
Prior	184,716
Financing Receivable, Converted	3,284
Revolving Loans	35,460
Total	1,309,895
Commercial Real Estate-Investor Owned Portfolio Segment [Member] | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	246,319
2019	321,849
2018	204,242
2017	126,567
2016	153,904
Prior	181,761
Financing Receivable, Converted	3,284
Revolving Loans	35,460
Total	1,273,386
Commercial Real Estate-Investor Owned Portfolio Segment [Member] | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	5,136
2019	4,220
2018	1,192
2017	369
2016	12,681
Prior	1,275
Financing Receivable, Converted	0
Revolving Loans	0
Total	24,873
Commercial Real Estate-Investor Owned Portfolio Segment [Member] | Classified (8 & 9)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	966
2018	8,286
2017	455
2016	249
Prior	1,680
Financing Receivable, Converted	0
Revolving Loans	0
Total	11,636
Commercial Real Estate-Owner Occupied Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	157,387
2019	203,638
2018	97,152
2017	89,245
2016	53,523
Prior	89,465
Financing Receivable, Converted	2,756
Revolving Loans	45,383
Total	738,549
Commercial Real Estate-Owner Occupied Portfolio Segment [Member] | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	147,313
2019	200,519
2018	92,624
2017	79,058
2016	44,990
Prior	80,172
Financing Receivable, Converted	2,756
Revolving Loans	42,883
Total	690,315
Commercial Real Estate-Owner Occupied Portfolio Segment [Member] | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	9,473
2019	1,963
2018	261
2017	9,729
2016	8,533
Prior	5,074
Financing Receivable, Converted	0
Revolving Loans	2,500
Total	37,533
Commercial Real Estate-Owner Occupied Portfolio Segment [Member] | Classified (8 & 9)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	601
2019	1,156
2018	4,267
2017	458
2016	0
Prior	4,219
Financing Receivable, Converted	0
Revolving Loans	0
Total	10,701
Construction Real Estate Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	78,391
2019	168,885
2018	123,163
2017	48,602
2016	28,060
Prior	13,489
Financing Receivable, Converted	0
Revolving Loans	20,631
Total	481,221
Construction Real Estate Portfolio Segment [Member] | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	75,983
2019	167,936
2018	121,909
2017	37,555
2016	28,060
Prior	12,906
Financing Receivable, Converted	0
Revolving Loans	20,631
Total	464,980
Construction Real Estate Portfolio Segment [Member] | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	2,408
2019	722
2018	1,254
2017	11,047
2016	0
Prior	546
Financing Receivable, Converted	0
Revolving Loans	0
Total	15,977
Construction Real Estate Portfolio Segment [Member] | Classified (8 & 9)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	227
2018	0
2017	0
2016	0
Prior	37
Financing Receivable, Converted	0
Revolving Loans	0
Total	264
Residential Portfolio Segment
Financing Receivable, Credit Quality Indicator [Line Items]
2020	26,813
2019	35,245
2018	23,674
2017	19,944
2016	34,640
Prior	120,508
Financing Receivable, Converted	870
Revolving Loans	64,357
Total	326,051
Residential Portfolio Segment | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	26,448
2019	33,085
2018	22,074
2017	19,931
2016	34,427
Prior	115,036
Financing Receivable, Converted	591
Revolving Loans	63,505
Total	315,097
Residential Portfolio Segment | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	181
2019	895
2018	842
2017	0
2016	0
Prior	2,027
Financing Receivable, Converted	279
Revolving Loans	802
Total	5,026
Residential Portfolio Segment | Classified (8 & 9)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	184
2019	1,265
2018	758
2017	13
2016	213
Prior	3,445
Financing Receivable, Converted	0
Revolving Loans	50
Total	5,928
Other
Financing Receivable, Credit Quality Indicator [Line Items]
2020	8,758
2019	25,570
2018	20,618
2017	686
2016	3,705
Prior	34,474
Financing Receivable, Converted	10
Revolving Loans	43,979
Total	137,800
Other | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	8,758
2019	25,567
2018	20,615
2017	682
2016	3,705
Prior	34,455
Financing Receivable, Converted	0
Revolving Loans	43,971
Total	137,753
Other | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	2
2018	0
2017	0
2016	0
Prior	0
Financing Receivable, Converted	0
Revolving Loans	1
Total	3
Other | Classified (8 & 9)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	1
2018	3
2017	4
2016	0
Prior	19
Financing Receivable, Converted	10
Revolving Loans	7
Total	$ 44

Loans - Summary of Performing a

Loans - Summary of Performing and Non Performing Loans (Details) $ in Thousands	Jun. 30, 2020USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	$ 15,058
Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	14,999
Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	59
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	11,720
Commercial and industrial | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	11,682
Commercial and industrial | Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	38
Residential Portfolio Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	941
Residential Portfolio Segment | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	941
Residential Portfolio Segment | Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	0
Other
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	2,397
Other | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	2,376
Other | Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	$ 21

Loans - Summary of Recorded I_4

Loans - Summary of Recorded Investment by Risk Category of Portfolio Loans by Portfolio Class and Category (Details) - Non-Covered Loans - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	$ 41,473	$ 26,425
Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	17,324
Residential Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	4,478
Blanket Lien
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	4,872
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	31,938	22,578
Commercial and industrial | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	13,124
Commercial and industrial | Residential Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	0
Commercial and industrial | Blanket Lien
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	4,872
CRE - investor owned
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	2,389	2,303
CRE - investor owned | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	2,389
CRE - investor owned | Residential Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	0
CRE - investor owned | Blanket Lien
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	0
CRE - owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	2,400	213
CRE - owner occupied | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	1,811
CRE - owner occupied | Residential Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	0
CRE - owner occupied | Blanket Lien
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	0
Construction and land development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	207
Construction and land development | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	0
Construction and land development | Residential Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	207
Construction and land development | Blanket Lien
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	0
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	4,499	1,330
Residential real estate | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	0
Residential real estate | Residential Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	4,271
Residential real estate | Blanket Lien
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	0
Other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	$ 40	1
Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		4,954,405
Pass (1-6) | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		2,151,084
Pass (1-6) | CRE - investor owned
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		1,242,569
Pass (1-6) | CRE - owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		643,276
Pass (1-6) | Construction and land development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		437,134
Pass (1-6) | Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		348,246
Pass (1-6) | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		132,096
Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		187,656
Watch (7) | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		124,718
Watch (7) | CRE - investor owned
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		17,572
Watch (7) | CRE - owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		28,773
Watch (7) | Construction and land development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		12,140
Watch (7) | Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		4,450
Watch (7) | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		3
Classified (8 & 9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		81,987
Classified (8 & 9) | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		70,021
Classified (8 & 9) | CRE - investor owned
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		2,840
Classified (8 & 9) | CRE - owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		6,473
Classified (8 & 9) | Construction and land development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		106
Classified (8 & 9) | Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		2,496
Classified (8 & 9) | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		51
Total
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		5,224,048
Total | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		2,345,823
Total | CRE - investor owned
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		1,262,981
Total | CRE - owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		678,522
Total | Construction and land development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		449,380
Total | Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		355,192
Total | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		$ 132,150

Commitments (Details)

Commitments (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Unadvanced Commitment on Impaired Loan
Schedule of Commitments [Line Items]
Estimated losses attributable to unadvanced commitments on impaired loans	$ 4,900	$ 400
Commitments to extend credit
Schedule of Commitments [Line Items]
Off-balance sheet financial instruments, contractual amounts	1,659,225	1,469,413
Commitments to extend credit | Fixed Rate Loan Commitment
Schedule of Commitments [Line Items]
Off-balance sheet financial instruments, contractual amounts	161,300	144,800
Letters of credit
Schedule of Commitments [Line Items]
Off-balance sheet financial instruments, contractual amounts	$ 51,798	$ 47,969
Letters of credit | Maximum
Schedule of Commitments [Line Items]
Remaining term	4 years
Letters of credit | Minimum
Schedule of Commitments [Line Items]
Remaining term	1 month

Derivative Financial Instrume_3

Derivative Financial Instruments (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2021	Dec. 31, 2019
Securities Sold under Agreements to Repurchase [Abstract]
Gross Amounts Recognized	$ 196,532		$ 230,886
Gross Amounts Offset in the Statement of Financial Position	0		0
Net Amounts of Liabilities presented in the Statement of Financial Position	196,532		230,886
Financial Instruments	0		0
Fair Value Collateral Posted	196,532		230,886
Net Amount	0		0
Fair value of derivatives in a net liability position	46,800
Posted collateral	47,100
Interest rate swap
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Asset derivatives (other assets), fair value	35,728		11,055
Liability derivatives (other liabilities), fair value	46,828		14,747
Derivative Asset [Abstract]
Gross Amounts Offset in the Statement of Financial Position	0		0
Derivative financial instruments	35,728		11,055
Financial Instruments	14		56
Fair Value Collateral Posted	0		0
Net Amount	35,714		10,999
Derivative Liability [Abstract]
Gross Amounts Offset in the Statement of Financial Position	0		0
Net Amounts of Liabilities presented in the Statement of Financial Position	46,828		14,747
Financial Instruments	14		56
Fair Value Collateral Posted	46,222		14,573
Net Amount	592		118
Derivatives Designated as Hedging Instruments
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Asset derivatives (other assets), fair value	0		0
Liability derivatives (other liabilities), fair value	10,840		2,872
Derivatives Designated as Hedging Instruments | Other Assets | Interest rate swap
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Asset, Notional Amount	261,962		61,962
Asset derivatives (other assets), fair value	0		0
Derivatives Designated as Hedging Instruments | Other Liabilities | Interest rate swap
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Liability derivatives (other liabilities), fair value	10,840		2,872
Derivatives not Designated as Hedging Instruments
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Asset derivatives (other assets), fair value	35,728		11,055
Liability derivatives (other liabilities), fair value	35,988		11,875
Derivatives not Designated as Hedging Instruments | Other Assets | Interest rate swap
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Asset, Notional Amount	1,021,528		749,819
Asset derivatives (other assets), fair value	35,728		11,055
Derivatives not Designated as Hedging Instruments | Other Liabilities | Interest rate swap
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Liability derivatives (other liabilities), fair value	$ 35,988		$ 11,875
Cash Flow Hedging | Subordinated Debt [Member]
Derivative [Line Items]
Derivative, Variable Interest Rate	2.62%
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Asset, Notional Amount	$ 62,000
Cash Flow Hedging | Federal Home Loan Bank Overnight Advances [Member]
Derivative [Line Items]
Derivative, fixed rate	1.12%
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Asset, Notional Amount	$ 100,000
Cash Flow Hedging | Federal Home Loan Bank 3 Month Advances [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Asset, Notional Amount	$ 100,000
Maximum | Cash Flow Hedging | Subordinated Debt [Member]
Derivative [Line Items]
Cash flow hedge term	6 years
Maximum | Cash Flow Hedging | Federal Home Loan Bank Overnight Advances [Member]
Derivative [Line Items]
Cash flow hedge term	3 years
Maximum | Cash Flow Hedging | Federal Home Loan Bank 3 Month Advances [Member]
Derivative [Line Items]
Cash flow hedge term	5 years
Scenario, Forecast | Cash Flow Hedging
Derivative [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income		$ 2,800

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Assets
Securities available for sale	$ 998,104	$ 1,135,317
Estimate of Fair Value Measurement [Member]
Assets
State tax credits held for sale	44,164	39,046
Obligations of U.S. Government-sponsored enterprises
Assets
Securities available for sale	10,241	10,046
Obligations of states and political subdivisions
Assets
Securities available for sale	254,278	213,024
Agency mortgage-backed securities
Assets
Securities available for sale	720,991	902,021
US Treasury Bill Securities [Member]
Assets
Securities available for sale	10,566	10,226
Corporate Debt Securities [Member]
Assets
Securities available for sale	2,028
Recurring basis | Estimate of Fair Value Measurement [Member]
Assets
Securities available for sale	998,104	1,135,317
Derivatives	35,728	11,055
Total assets	1,033,832	1,146,372
Liabilities
Derivatives	46,828	14,747
Total liabilities	46,828	14,747
Recurring basis | Obligations of U.S. Government-sponsored enterprises | Estimate of Fair Value Measurement [Member]
Assets
Securities available for sale	10,241	10,046
Recurring basis | Obligations of states and political subdivisions | Estimate of Fair Value Measurement [Member]
Assets
Securities available for sale	254,278	213,024
Recurring basis | Agency mortgage-backed securities | Estimate of Fair Value Measurement [Member]
Assets
Securities available for sale	720,991	902,021
Recurring basis | US Treasury Bill Securities [Member] | Estimate of Fair Value Measurement [Member]
Assets
Securities available for sale	10,566	10,226
Recurring basis | Corporate Debt Securities [Member] | Estimate of Fair Value Measurement [Member]
Assets
Securities available for sale	2,028
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Securities available for sale	0	0
Derivatives	0	0
Total assets	0	0
Liabilities
Derivatives	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) | Agency mortgage-backed securities
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 | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate Debt Securities [Member]
Assets
Securities available for sale	0
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets
Securities available for sale	998,104	1,135,317
Derivatives	35,728	11,055
Total assets	1,033,832	1,146,372
Liabilities
Derivatives	46,828	14,747
Total liabilities	46,828	14,747
Recurring basis | Significant Other Observable Inputs (Level 2) | Obligations of U.S. Government-sponsored enterprises
Assets
Securities available for sale	10,241	10,046
Recurring basis | Significant Other Observable Inputs (Level 2) | Obligations of states and political subdivisions
Assets
Securities available for sale	254,278	213,024
Recurring basis | Significant Other Observable Inputs (Level 2) | Agency mortgage-backed securities
Assets
Securities available for sale	720,991	902,021
Recurring basis | Significant Other Observable Inputs (Level 2) | US Treasury Bill Securities [Member]
Assets
Securities available for sale	10,566	10,226
Recurring basis | Significant Other Observable Inputs (Level 2) | Corporate Debt Securities [Member]
Assets
Securities available for sale	2,028
Recurring basis | Significant Unobservable Inputs (Level 3)
Assets
Securities available for sale	0	0
Derivatives	0	0
Total assets	0	0
Liabilities
Derivatives	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) | Agency mortgage-backed securities
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	Jun. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other investments, at cost	$ 43,106	$ 38,044
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	$ 44,164	$ 39,046

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 $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020USD ($)	Jun. 30, 2020USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Change in Fair Value, Gains (Losses) in Period	$ 3,298	$ 4,007
Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Change in Fair Value, Gains (Losses) in Period	3,219	3,230
Other real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Change in Fair Value, Gains (Losses) in Period	79	777
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
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	0	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 Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	7,526	7,526
Significant Unobservable Inputs (Level 3) | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	3,627	3,627
Significant Unobservable Inputs (Level 3) | Other real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate	3,899	3,899
Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	7,526	7,526
Estimate of Fair Value Measurement [Member] | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	3,627	3,627
Estimate of Fair Value Measurement [Member] | Other real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate	$ 3,899	$ 3,899

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	Jun. 30, 2020	Dec. 31, 2019
Balance sheet assets
Securities available for sale	$ 998,104	$ 1,135,317
Securities held-to-maturity, net	346,436	181,166
Carrying Amount
Balance sheet assets
Securities held-to-maturity, net	345,791	181,166
Other investments	43,106	38,044
Loans held for sale	16,029	5,570
Loans, net	6,029,781	5,271,049
State tax credits held for sale	38,820	36,802
Balance sheet liabilities
Certificates of deposit	659,166	826,447
Subordinated debentures and notes	203,384	141,258
FHLB advances	250,000	222,406
Other borrowings and notes payable	227,961	265,172
Estimated fair value
Balance sheet assets
Securities held-to-maturity, net	356,139	181,939
Other investments	43,106	38,044
Loans held for sale	16,029	5,570
Loans, net	5,876,000	5,205,651
State tax credits held for sale	44,164	39,046
Balance sheet liabilities
Certificates of deposit	665,374	825,203
Subordinated debentures and notes	192,852	130,985
FHLB advances	251,978	221,402
Other borrowings and notes payable	$ 227,961	$ 265,172

Subordinated Debentures (Detail

Subordinated Debentures (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020USD ($)	Jun. 30, 2019USD ($)	Dec. 31, 2019USD ($)
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 203,384		$ 141,258
Trust Preferred Securities Subject to Mandatory Redemption [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	92,215		92,132
Trust Preferred Securities Subject to Mandatory Redemption [Member] | EFSC Clayco Statutory Trust I [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 3,196		3,196
Subordinated Borrowing, Due Date	Dec. 17, 2033
Subordinated Borrowing, Call Date	Dec. 17, 2008
Trust Preferred Securities Subject to Mandatory Redemption [Member] | EFSC Clayco Statutory Trust I [Member] | London Interbank Offered Rate (LIBOR) [Member]
Subordinated Borrowing [Line Items]
Subordinated Borrowing, Basis Spread on Variable Rate	0.0285
Trust Preferred Securities Subject to Mandatory Redemption [Member] | EFSC Capital Trust II [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 5,155		5,155
Subordinated Borrowing, Due Date	Jun. 17, 2034
Subordinated Borrowing, Call Date	Jun. 17, 2009
Trust Preferred Securities Subject to Mandatory Redemption [Member] | EFSC Capital Trust II [Member] | London Interbank Offered Rate (LIBOR) [Member]
Subordinated Borrowing [Line Items]
Subordinated Borrowing, Basis Spread on Variable Rate	0.0265
Trust Preferred Securities Subject to Mandatory Redemption [Member] | EFSC Statutory Trust III [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 11,341		11,341
Subordinated Borrowing, Due Date	Dec. 15, 2034
Subordinated Borrowing, Call Date	Dec. 15, 2009
Trust Preferred Securities Subject to Mandatory Redemption [Member] | EFSC Statutory Trust III [Member] | London Interbank Offered Rate (LIBOR) [Member]
Subordinated Borrowing [Line Items]
Subordinated Borrowing, Basis Spread on Variable Rate	0.0197
Trust Preferred Securities Subject to Mandatory Redemption [Member] | EFSC Clayco Statutory Trust II [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 4,124		4,124
Subordinated Borrowing, Due Date	Sep. 15, 2035
Subordinated Borrowing, Call Date	Sep. 15, 2010
Trust Preferred Securities Subject to Mandatory Redemption [Member] | EFSC Clayco Statutory Trust II [Member] | London Interbank Offered Rate (LIBOR) [Member]
Subordinated Borrowing [Line Items]
Subordinated Borrowing, Basis Spread on Variable Rate	0.0183
Trust Preferred Securities Subject to Mandatory Redemption [Member] | EFSC Statutory Trust IV [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 10,310		10,310
Subordinated Borrowing, Due Date	Dec. 15, 2035
Subordinated Borrowing, Call Date	Dec. 15, 2010
Trust Preferred Securities Subject to Mandatory Redemption [Member] | EFSC Statutory Trust IV [Member] | London Interbank Offered Rate (LIBOR) [Member]
Subordinated Borrowing [Line Items]
Subordinated Borrowing, Basis Spread on Variable Rate	0.0144
Trust Preferred Securities Subject to Mandatory Redemption [Member] | EFSC Statutory Trust V [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 4,124		4,124
Subordinated Borrowing, Due Date	Sep. 15, 2036
Subordinated Borrowing, Call Date	Sep. 15, 2011
Trust Preferred Securities Subject to Mandatory Redemption [Member] | EFSC Statutory Trust V [Member] | London Interbank Offered Rate (LIBOR) [Member]
Subordinated Borrowing [Line Items]
Subordinated Borrowing, Basis Spread on Variable Rate	0.016
Trust Preferred Securities Subject to Mandatory Redemption [Member] | EFSC Capital Trust VI [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 14,433		14,433
Subordinated Borrowing, Due Date	Mar. 30, 2037
Subordinated Borrowing, Call Date	Mar. 30, 2012
Trust Preferred Securities Subject to Mandatory Redemption [Member] | EFSC Capital Trust VI [Member] | London Interbank Offered Rate (LIBOR) [Member]
Subordinated Borrowing [Line Items]
Subordinated Borrowing, Basis Spread on Variable Rate	0.016
Trust Preferred Securities Subject to Mandatory Redemption [Member] | EFSC Capital Trust VII [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 4,124		4,124
Subordinated Borrowing, Due Date	Dec. 15, 2037
Subordinated Borrowing, Call Date	Dec. 15, 2012
Trust Preferred Securities Subject to Mandatory Redemption [Member] | EFSC Capital Trust VII [Member] | London Interbank Offered Rate (LIBOR) [Member]
Subordinated Borrowing [Line Items]
Subordinated Borrowing, Basis Spread on Variable Rate	0.0225
Trust Preferred Securities Subject to Mandatory Redemption [Member] | JEFFCO Stat Trust I [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 7,819		7,886
Subordinated Borrowing, Due Date	Feb. 22, 2031
Subordinated Borrowing, Call Date	Feb. 22, 2011
Subordinated Borrowing, Interest Rate	10.20%
Trust Preferred Securities Subject to Mandatory Redemption [Member] | JEFFCO Stat Trust II [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 4,415		4,388
Subordinated Borrowing, Due Date	Mar. 17, 2034
Subordinated Borrowing, Call Date	Mar. 17, 2009
Trust Preferred Securities Subject to Mandatory Redemption [Member] | JEFFCO Stat Trust II [Member] | London Interbank Offered Rate (LIBOR) [Member]
Subordinated Borrowing [Line Items]
Subordinated Borrowing, Interest Rate	2.75%
Trust Preferred Securities Subject to Mandatory Redemption [Member] | Trinity Capital Trust III [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 5,239		5,206
Subordinated Borrowing, Due Date	Sep. 8, 2034
Subordinated Borrowing, Call Date	Sep. 8, 2009
Trust Preferred Securities Subject to Mandatory Redemption [Member] | Trinity Capital Trust III [Member] | London Interbank Offered Rate (LIBOR) [Member]
Subordinated Borrowing [Line Items]
Subordinated Borrowing, Basis Spread on Variable Rate	0.027
Trust Preferred Securities Subject to Mandatory Redemption [Member] | Trinity Capital Trust IV [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 10,310		10,302
Subordinated Borrowing, Due Date	Nov. 23, 2035
Subordinated Borrowing, Call Date	Aug. 23, 2010
Subordinated Borrowing, Interest Rate	6.88%
Trust Preferred Securities Subject to Mandatory Redemption [Member] | Trinity Capital Trust V [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 7,625		7,543
Subordinated Borrowing, Due Date	Dec. 15, 2036
Subordinated Borrowing, Call Date	Sep. 15, 2011
Trust Preferred Securities Subject to Mandatory Redemption [Member] | Trinity Capital Trust V [Member] | London Interbank Offered Rate (LIBOR) [Member]
Subordinated Borrowing [Line Items]
Subordinated Borrowing, Basis Spread on Variable Rate	0.0165
Senior Subordinated Notes [Member]
Subordinated Borrowing [Line Items]
Subordinated Borrowing, Interest Rate	4.75%
Payments of Debt Issuance Costs	$ 2,081	$ 874
Subordinated notes, net of issuance costs	$ 111,169		49,126
Senior Subordinated Notes [Member] | London Interbank Offered Rate (LIBOR) [Member]
Subordinated Borrowing [Line Items]
Subordinated Borrowing, Basis Spread on Variable Rate	0.03387
Senior Subordinated Notes [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Subordinated Borrowing [Line Items]
Subordinated Borrowing, Basis Spread on Variable Rate	0.0566
5.75% [Member] | Senior Subordinated Notes [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 63,250		0
Subordinated Borrowing, Due Date	Jun. 1, 2030
Subordinated Borrowing, Call Date	Jun. 1, 2025
Subordinated Borrowing, Interest Rate	5.75%
4.75% [Member] | Senior Subordinated Notes [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes	$ 50,000		$ 50,000
Subordinated Borrowing, Due Date	Nov. 1, 2026
Subordinated Borrowing, Call Date	Nov. 1, 2021

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income - Changes in Accumulated Other Comprehensive Income After-tax By Component (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 846,436	$ 797,835	$ 867,185	$ 603,804
Ending balance	867,963	825,501	867,963	825,501
Net Unrealized Gain (Loss) on Available-for-Sale Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	25,538	2,675	14,977	(9,047)
Net change	10,984	12,842	21,545	24,564
Ending balance	27,872	15,517	27,872	15,517
Debt Securities, Held-to-maturity, Transfer, Derivative Hedge, Gain (Loss)	(8,650)		(8,650)
Unamortized Gain (Loss) on Held-to-Maturity Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	4,778	(233)	4,934	(235)
Net change	(329)	3	(485)	5
Ending balance	13,099	(230)	13,099	(230)
Debt Securities, Held-to-maturity, Transfer, Derivative Hedge, Gain (Loss)	8,650		8,650
Net Unrealized Loss on Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(7,219)	(952)	(2,162)	0
Net change	(943)	(1,261)	(6,000)	(2,213)
Ending balance	(8,162)	(2,213)	(8,162)	(2,213)
Debt Securities, Held-to-maturity, Transfer, Derivative Hedge, Gain (Loss)	0		0
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	23,097	1,490	17,749	(9,282)
Net change	9,712	11,584	15,060	22,356
Ending balance	32,809	$ 13,074	32,809	$ 13,074
Debt Securities, Held-to-maturity, Transfer, Derivative Hedge, Gain (Loss)	$ 0		$ 0

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income - Pre-tax and After-tax Changes in the Components of Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Reclassification Adjustments, after Tax [Abstract]
Change in unrealized gain on available-for-sale debt securities, before tax	$ 14,587	$ 17,054	$ 28,616	$ 32,329
Change in unrealized gain on available-for-sale debt securities, tax	3,603	4,212	7,068	7,985
Change in unrealized gain on available-for-sale debt securities, after tax	10,984	12,842	21,548	24,344
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax [Abstract]
Reclassification adjustment for realized (gain) loss on sale of available-for-sale debt securities, before tax			(4)	292
Reclassification adjustment for realized (gain) loss on sale of available-for-sale debt securities, tax			(1)	72
Reclassification adjustment for realized (gain) loss on sale of available-for-sale debt securities, after tax	0	0	3	(220)
Other Comprehensive Loss, Held-to-maturity Security, OTTI, after Tax and Adjustments [Abstract]
Reclassification of (gain) loss on held-to-maturity securities, before tax	(437)	4	(644)	7
Reclassification of (gain) loss on held-to-maturity securities, tax	(108)	1	(159)	2
Reclassification of (gain) loss on held-to-maturity securities, after tax	(329)	3	(485)	5
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent [Abstract]
Change in unrealized loss on cash flow hedges arising during the period, before tax	(1,563)	(1,679)	(8,442)	(2,944)
Change in unrealized loss on cash flow hedges arising during the period, tax	(386)	(414)	(2,085)	(727)
Change in unrealized loss on cash flow hedges arising during the period, after tax	(1,177)	(1,265)	(6,357)	(2,217)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract]
Reclassification of loss on cash flow hedges, before tax	311	5	474	5
Reclassification of loss on cash flow hedges, tax	77	1	117	1
Reclassification of loss on cash flow hedges, after tax	(234)	(4)	(357)	(4)
OCI, Net of Tax [Abstract]
Total other comprehensive income, before tax	12,898	15,384	20,000	29,689
Total other comprehensive income, tax	3,186	3,800	4,940	7,333
Total other comprehensive income, after-tax	$ 9,712	$ 11,584	$ 15,060	$ 22,356