Enterprise Financial Services (EFSC) 10-Q 6 May 20 2020 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2020	May 04, 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		26,161,001
Entity Central Index Key	0001025835
Document Period End Date	Mar. 31, 2020
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Amendment Flag	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Assets
Cash and due from banks	$ 98,619	$ 74,769
Federal funds sold	3,068	3,060
Interest-earning deposits (including $43,315 and $15,285 pledged as collateral, respectively)	81,996	89,427
Total cash and cash equivalents	183,683	167,256
Interest-earning deposits greater than 90 days	3,730	3,730
Securities available-for-sale	1,161,514	1,135,317
Debt Securities, Held-To-Maturity, Net Of Allowance For Credit Losses	178,932	181,166
Trade and Loans Receivables Held-for-sale, Net, Not Part of Disposal Group	8,430	5,570
Loans	5,457,517	5,314,337
Less: Allowance for credit losses on loans	92,187	43,288
Total loans, net	5,365,330	5,271,049
Other investments	41,703	38,044
Fixed assets, net	59,358	60,013
Goodwill	210,344	210,344
Intangible assets, net	24,585	26,076
Other assets	263,034	235,226
Total assets	7,500,643	7,333,791
Liabilities and Shareholders' Equity
Noninterest-bearing deposit accounts	1,354,571	1,327,348
Interest-bearing transaction accounts	1,389,603	1,367,444
Money market accounts	1,925,415	1,713,615
Savings accounts	554,413	536,169
Certificates of deposit:
Brokered	170,667	215,758
Other	595,237	610,689
Total deposits	5,989,906	5,771,023
Subordinated debentures and notes	141,336	141,258
FHLB advances	222,000	222,406
Other borrowings	173,061	230,886
Notes payable	32,857	34,286
Other liabilities	95,047	66,747
Total liabilities	6,654,207	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; 28,140,602 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	525,838	526,599
Retained earnings	370,748	380,737
Accumulated other comprehensive income	23,097	17,749
Total shareholders' equity	846,436	867,185
Total liabilities and shareholders' equity	$ 7,500,643	$ 7,333,791

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Assets
Collateral pledged	$ 43,315	$ 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	28,140,602	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
	Mar. 31, 2020	Mar. 31, 2019
Interest income:
Interest and fees on loans	$ 67,169	$ 61,025
Interest on debt securities:
Taxable	7,557	5,475
Nontaxable	1,489	447
Interest on interest-earning deposits	300	447
Dividends on equity securities	173	223
Total interest income	76,688	67,617
Interest expense:
Interest Expense, Deposits	9,888	11,820
Subordinated debentures and notes	1,919	1,648
FHLB advances	895	1,398
Notes payable and other borrowings	618	408
Total interest expense	13,320	15,274
Net interest income	63,368	52,343
Provision for credit losses	22,264	1,476
Net interest income after provision for credit losses	41,104	50,867
Noninterest income:
Total noninterest income	13,408	9,230
Noninterest expense:
Employee compensation and benefits	21,685	19,352
Occupancy	3,347	2,637
Data processing	2,082	1,906
Professional fees	862	746
Merger-related expenses	0	7,270
Other	10,697	7,927
Total noninterest expense	38,673	39,838
Income before income tax expense	15,839	20,259
Income tax expense	2,971	4,103
Net income	$ 12,868	$ 16,156
Earnings per common share
Basic (usd per share)	$ 0.49	$ 0.68
Diluted (usd per share)	$ 0.48	$ 0.67
Deposit Account [Member]
Noninterest income:
Total noninterest income	$ 3,143	$ 2,935
Fiduciary and Trust [Member]
Noninterest income:
Total noninterest income	2,501	1,992
Card Services Revenue [Member]
Noninterest income:
Total noninterest income	2,247	1,790
Tax credit activity, net [Member]
Noninterest income:
Total noninterest income	2,036	158
Financial Service, Other [Member]
Noninterest income:
Total noninterest income	$ 3,481	$ 2,355

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 12,868	$ 16,156
Other comprehensive income (loss), after-tax:
Change in unrealized gain on available-for-sale debt securities	10,564	11,502
Reclassification adjustment for realized (gain) loss on sale of available-for-sale debt securities	(3)	220
Reclassification of (gain) loss on held-to-maturity securities	(156)	2
Change in unrealized loss on cash flow hedges arising during the period	(5,180)	(952)
Reclassification of loss on cash flow hedges	123	0
Total other comprehensive income, after-tax	5,348	10,772
Comprehensive income	$ 18,216	$ 26,928

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	16,156	0	0	0	16,156	0
Other comprehensive income	10,772	0	0	0	0	10,772
Comprehensive income	26,928	0	0	0	16,156	10,772
Cash dividends paid on common shares	(3,763)	0	0	0	3,763	0
Issuance under equity compensation plans, net	(1,940)	(1)	0	(1,941)	0	0
Share-based Payment Arrangement, Noncash Expense	921	0	0	921	0	0
Shares issued in connection with acquisition	171,885	40	0	171,845	0	0
Ending balance at Mar. 31, 2019	797,835	280	(42,655)	521,761	316,959	1,490
Beginning balance at Dec. 31, 2019	867,185	281	(58,181)	526,599	380,737	17,749
Net income	12,868	0	0	0	12,868	0
Other comprehensive income	5,348	0	0	0	0	5,348
Comprehensive income	18,216	0	0	0	12,868	5,348
Cash dividends paid on common shares	(4,743)	0	0	0	(4,743)	0
Repurchase of common stock	(15,347)	0	(15,347)	0	0	0
Issuance under equity compensation plans, net	(1,721)	0	0	(1,721)	0	0
Share-based Payment Arrangement, Noncash Expense	960	0	0	960	0	0
Reclassification for the adoption of new accounting standards	(18,114)	0	0	0	(18,114)	0
Ending balance at Mar. 31, 2020	$ 846,436	$ 281	$ (73,528)	$ 525,838	$ 370,748	$ 23,097

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash dividends paid on common shares, per share	$ 0.18	$ 0.14
Issuance under equity compensation plans, shares	73,515	75,089

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows $ in Thousands	3 Months Ended
	Mar. 31, 2020USD ($)	Mar. 31, 2019USD ($)
Cash flows from operating activities:
Net income	$ 12,868	$ 16,156
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	1,524	1,162
Provision for credit losses	22,264	1,476
Deferred income taxes	(183)	2,727
Net amortization of debt securities	1,054	407
Amortization of intangible assets	1,491	838
Gain on sale of investment securities	(4)	292
Mortgage loans originated-for-sale	(33,537)	(4,087)
Proceeds from mortgage loans sold	30,888	3,825
Valuation adjustments and sale of other real estate	52	(66)
Sale of state tax credits	(124)	(158)
Share-based Payment Arrangement, Noncash Expense	960	921
Net accretion of loan discount	(2,510)	(596)
Changes in other assets and liabilities, net
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(2,181)	(7,185)
Net cash provided by operating activities	32,562	15,712
Cash flows from investing activities:
Payments for Previous Acquisition	0	(23,376)
Net decrease (increase) in loans	(134,482)	13,855
Sale of debt securities, available-for-sale	207	259,420
Paydown or maturity of debt securities, available-for-sale	55,932	27,684
Paydown or maturity of debt securities, held-to-maturity	1,595	1,269
Redemption of other investments	24,310	11,744
Sale of state tax credits held for sale	1,186	2,381
Sale of other real estate	443	66
Payments for the purchase of:
Available-for-sale debt securities	(69,336)	(221,711)
Other investments	(28,809)	(14,977)
State tax credits held for sale	(3,780)	(1,852)
Fixed assets, net	(918)	(1,268)
Net cash (used in) provided by investing activities	(153,652)	53,235
Cash flows from financing activities:
Net increase (decrease) in noninterest-bearing deposit accounts	27,223	(83,290)
Net increase (decrease) in interest-bearing deposit accounts	191,659	(48,770)
Repayments of FHLB advances, net	(300)	105,025
Proceeds from Issuance of Long-term Debt	0	40,000
Repayments of Long-term Debt	(1,429)	(2,000)
Net decrease in other borrowings	(57,825)	(49,279)
Cash dividends paid on common stock	(4,743)	(3,763)
Payments for Repurchase of Common Stock	(15,347)	0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(1,721)	(1,940)
Net cash provided by (used in) financing activities	137,517	(44,017)
Net increase in cash and cash equivalents	16,427	24,930
Cash and cash equivalents, beginning of period	167,256	196,552
Cash and cash equivalents, end of period	183,683	221,482
Supplemental Cash Flow Information [Abstract]
Cash paid during the period for interest	13,026	14,020
Noncash transactions:
Transfer to other real estate owned in settlement of loans	0	1,372
Right-of-use assets obtained in exchange for lease obligations	$ 200	$ 0
Common shares issued related to acquisition	0	171,885

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 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 months ended March 31, 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 Securities and Exchange Commission. 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 in the initial fiscal year of adoption. 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, 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 $16.7 million at March 31, 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 significant 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. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. 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 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. 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	3 Months Ended
	Mar. 31, 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 March 31, (in thousands, except per share data) 2020 2019 Net income as reported $ 12,868 $ 16,156 Weighted average common shares outstanding 26,473 23,927 Additional dilutive common stock equivalents 66 156 Weighted average diluted common shares outstanding 26,539 24,083 Basic earnings per common share: $ 0.49 $ 0.68 Diluted earnings per common share: 0.48 0.67 For the three months ended March 31, 2020 and 2019 common stock equivalents of approximately 62,000 and 122,000

Investments

Investments	3 Months Ended
	Mar. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Investments	INVESTMENTS The following table presents the amortized cost, gross unrealized gains and losses and fair value of securities available for sale and held to maturity: March 31, 2020 (in thousands) Amortized Cost Gross Gross Allowance for Credit Losses Fair Value Available-for-sale securities: Obligations of U.S. Government-sponsored enterprises $ 9,960 $ 270 $ — $ — $ 10,230 Obligations of states and political subdivisions 243,863 10,373 (205 ) — 254,031 Agency mortgage-backed securities 863,698 23,465 (496 ) — 886,667 U.S. Treasury bills 9,973 613 — — 10,586 Total securities available for sale $ 1,127,494 $ 34,721 $ (701 ) $ — $ 1,161,514 Held-to-maturity securities: Obligations of states and political subdivisions $ 11,688 $ 153 $ — $ (1 ) $ 11,840 Agency mortgage-backed securities 44,720 1,924 — — 46,644 Corporate debt securities 122,827 162 (3,090 ) (302 ) 119,597 Total securities held-to-maturity $ 179,235 $ 2,239 $ (3,090 ) $ (303 ) $ 178,081 Less: Allowance for credit losses 303 Total securities held-to-maturity, net $ 178,932 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 At March 31, 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 $431.7 million and $484.8 million at March 31, 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 March 31, 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 $ 2,018 $ 2,054 $ — $ — Due after one year through five years 26,301 27,369 4,444 4,503 Due after five years through ten years 10,205 10,576 130,071 126,934 Due after ten years 225,272 234,848 — — Agency mortgage-backed securities 863,698 886,667 44,720 46,644 $ 1,127,494 $ 1,161,514 $ 179,235 $ 178,081 The following table represents a summary of available-for-sale investment securities that had an unrealized loss: March 31, 2020 Less than 12 months 12 months or more Total (in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Obligations of states and political subdivisions $ 10,475 $ 205 $ — $ — $ 10,475 $ 205 Agency mortgage-backed securities 82,614 415 5,198 81 87,812 496 $ 93,089 $ 620 $ 5,198 $ 81 $ 98,287 $ 701 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 March 31, 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 March 31, 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 $4.5 million at March 31, 2020 and is excluded from the estimate of credit losses. Accrued interest receivable on held-to-maturity debt securities totaled $1.4 million at March 31, 2020 and is excluded from the estimate of credit losses. The estimate of expected credit losses considers historical credit loss information adjusted for current conditions and reasonable and supportable forecasts. At March 31, 2020, the ACL on held-to-maturity securities was $0.3 million .

Loans

Loans	3 Months Ended
	Mar. 31, 2020
Receivables [Abstract]
Portfolio Loans	LOANS Below is a summary of loans by category at March 31, 2020 and December 31, 2019 : (in thousands) March 31, 2020 December 31, 2019 Commercial and industrial $ 2,469,013 2,361,157 Real estate: Commercial - investor owned 1,327,814 1,299,884 Commercial - owner occupied 720,543 697,437 Construction and land development 469,627 457,273 Residential 346,758 366,261 Total real estate loans 2,864,742 2,820,855 Consumer and other 126,212 134,941 Loans, before unearned loan fees 5,459,967 5,316,953 Unearned loan fees, net (2,450 ) (2,616 ) Loans, including unearned loan fees $ 5,457,517 $ 5,314,337 The loan balance at March 31, 2020 includes a discount on acquired loans of $24.5 million . At March 31, 2020 loans of $2.7 billion were pledged to FHLB and the Federal Reserve Bank. A summary of the activity in the ACLL by category through March 31, 2020 is as follows: (in thousands) Commercial and industrial CRE - investor owned CRE - owner occupied Construction and land development Residential real estate Consumer and 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 11,591 3,224 1,994 2,309 2,011 566 21,695 Charge-offs (63 ) (2 ) — (31 ) (122 ) (86 ) (304 ) Recoveries 504 14 69 40 157 17 801 Balance at March 31, 2020 $ 45,981 $ 19,892 $ 9,477 $ 9,895 $ 5,395 $ 1,547 $ 92,187 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 $21.7 million provision for credit losses on loans in the first quarter 2020, compared to a $1.5 million provision for loan losses in the first quarter 2019 under the incurred loss method. The increase in the provision for credit losses on loans is due to the Company’s forecast of macroeconomic factors over the next 12 months, which significantly decreased in the first quarter 2020 due to the COVID-19 pandemic. The CECL methodology incorporates various economic scenarios, including baseline, upside and downside scenarios. In the first quarter 2020, the Company changed its weighting of economic scenarios to capture more downside risk in the economy. This changed added $2.2 million to the ACLL in the first quarter 2020. The recorded investment in nonperforming loans by category at March 31, 2020 and December 31, 2019 , is as follows: March 31, 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 $ 22,729 $ 3,731 $ 71 $ 26,531 $ 17,915 Real estate: Commercial - investor owned 4,115 — — 4,115 2,576 Commercial - owner occupied 2,110 — — 2,110 1,114 Construction and land development 214 — — 214 214 Residential 4,075 79 — 4,154 3,086 Consumer and other 25 — 55 80 — Total $ 33,268 $ 3,810 $ 126 $ 37,204 $ 24,905 There was no interest income recognized on nonaccrual loans in the first quarter 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 Consumer and 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 March 31, 2020: Type of Collateral (in thousands) Commercial Real Estate Residential Real Estate Blanket Lien Commercial and industrial $ 13,051 $ — $ 5,910 Real estate: Commercial - investor owned 4,115 — — Commercial - owner occupied 1,521 — — Construction and land development — 214 — Residential — 3,927 — Total $ 18,687 $ 4,141 $ 5,910 The recorded investment by category for loans restructured during the three months ended March 31, 2020 is as follows: March 31, 2020 (in thousands, except for number of loans) Number of loans Pre-Modification Outstanding Recorded Balance Post-Modification Outstanding Recorded Balance Commercial and industrial 1 $ 3,731 $ 3,731 Real estate: Residential 2 155 155 Total 3 $ 3,886 $ 3,886 There were no loans restructured during the three months ended March 31, 2019. There were no troubled debt restructured loans that subsequently defaulted during the three months ended March 31, 2020 or 2019. The aging of the recorded investment in past due loans by class at March 31, 2020 is shown below. March 31, 2020 (in thousands) 30-89 Days Past Due 90 or More Past Due Total Past Due Current Total Commercial and industrial $ 24,898 $ 9,491 $ 34,389 $ 2,434,624 $ 2,469,013 Real estate: Commercial - investor owned 1,996 3,438 5,434 1,322,380 1,327,814 Commercial - owner occupied 3,870 1,182 5,052 715,491 720,543 Construction and land development 95 — 95 469,532 469,627 Residential 5,124 1,482 6,606 340,152 346,758 Consumer and other 459 75 534 123,228 123,762 Total $ 36,442 $ 15,668 $ 52,110 $ 5,405,407 $ 5,457,517 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 March 31, 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) $ 274,021 $ 623,511 $ 328,712 $ 188,489 $ 53,064 $ 126,446 $ 2,557 $ 660,675 $ 2,257,475 Watch (7) 780 17,643 5,258 11,986 23,454 524 506 66,449 126,600 Classified (8-9) 649 20,887 8,438 3,881 5,253 3,581 431 26,687 69,807 Total Commercial and industrial $ 275,450 $ 662,041 $ 342,408 $ 204,356 $ 81,771 $ 130,551 $ 3,494 $ 753,811 $ 2,453,882 Commercial real estate-investor owned Pass (1-6) $ 114,369 $ 356,099 $ 229,830 $ 154,406 $ 173,623 $ 204,948 $ 1,745 $ 52,875 $ 1,287,895 Watch (7) 113 10,395 1,305 400 12,614 1,623 — — 26,450 Classified (8-9) — 978 8,043 445 246 3,757 — — 13,469 Total Commercial real estate-investor owned $ 114,482 $ 367,472 $ 239,178 $ 155,251 $ 186,483 $ 210,328 $ 1,745 $ 52,875 $ 1,327,814 Commercial real estate-owner occupied Pass (1-6) $ 50,382 $ 226,562 $ 99,918 $ 89,750 $ 58,499 $ 96,149 $ 2,797 $ 44,271 $ 668,328 Watch (7) 2,775 8,802 370 9,904 8,641 5,313 — 5,900 41,705 Classified (8-9) — 1,131 5,212 — — 4,167 — — 10,510 Total Commercial real estate-owner occupied $ 53,157 $ 236,495 $ 105,500 $ 99,654 $ 67,140 $ 105,629 $ 2,797 $ 50,171 $ 720,543 Construction real estate Pass (1-6) $ 23,035 $ 184,561 $ 123,931 $ 63,034 $ 28,407 $ 14,672 $ — $ 17,410 $ 455,050 Watch (7) 966 11,448 1,262 69 — 563 — — 14,308 Classified (8-9) — 226 — — — 43 — — 269 Total Construction real estate $ 24,001 $ 196,235 $ 125,193 $ 63,103 $ 28,407 $ 15,278 $ — $ 17,410 $ 469,627 Residential real estate Pass (1-6) $ 12,356 $ 37,811 $ 23,381 $ 24,306 $ 38,082 $ 132,715 $ 245 $ 65,660 $ 334,556 Watch (7) 1 1,045 875 — 4 2,683 — 1,093 5,701 Classified (8-9) — 1,715 767 13 131 2,882 — 49 5,557 Total residential real estate $ 12,357 $ 40,571 $ 25,023 $ 24,319 $ 38,217 $ 138,280 $ 245 $ 66,802 $ 345,814 Consumer and other Pass (1-6) $ 1,257 $ 26,478 $ 20,911 $ 1,735 $ 5,535 $ 35,940 $ — $ 29,311 $ 121,167 Watch (7) — 2 — — — 1 — 1 4 Classified (8-9) — 2 4 6 — 24 10 24 70 Total consumer and other $ 1,257 $ 26,482 $ 20,915 $ 1,741 $ 5,535 $ 35,965 $ 10 $ 29,336 $ 121,241 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: March 31, 2020 (in thousands) Performing Non Performing Total Commercial and industrial $ 15,060 $ 71 $ 15,131 Real estate: Residential 944 — 944 Consumer and other 2,465 56 2,521 Total $ 18,469 $ 127 $ 18,596 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 Consumer and 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 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. As of April 30, 2020, $392.1 million loans have participated in the programs, including $190.8 million loans deferring interest payments of $2.2 million . In addition, the Company has been actively participating in the PPP since the SBA began accepting applications in April 2020. In the second quarter 2020, the Company expects to fund $856.5 million in PPP loans that have been approved by the SBA.

Commitments

Commitments	3 Months Ended
	Mar. 31, 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 March 31, 2020 , and December 31, 2019 , are as follows: (in thousands) March 31, 2020 December 31, 2019 Commitments to extend credit $ 1,411,151 $ 1,469,413 Letters of credit 50,981 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 March 31, 2020 , and December 31, 2019 , approximately $138.1 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 include $3.7 million and 0.4 million for estimated losses attributable to the unadvanced commitments at March 31, 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 March 31, 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	3 Months Ended
	Mar. 31, 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 $2.2 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 March 31, 2020 and December 31, 2019 . Derivative Assets Derivative Liabilities March 31, 2020 December 31, 2019 March 31, 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 $ 9,587 Other Liabilities $ 2,872 Total $ — $ — $ 9,587 $ 2,872 Derivatives not Designated as Hedging Instruments Interest rate swap $ 842,899 Other Assets $ 33,697 $ 749,819 Other Assets $ 11,055 Other Liabilities $ 33,732 Other Liabilities $ 11,875 Total $ 33,697 $ 11,055 $ 33,732 $ 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 March 31, 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 March 31, 2020 Gross Amounts Not Offset in the Statement of Financial Position (in thousands) Gross Amounts Recognized Gross Amounts Offset in the Statement of Financial Position Net Amounts of Assets presented in the Statement of Financial Position Financial Instruments Fair Value Collateral Posted Net Amount Assets: Interest rate swap $ 33,697 $ — $ 33,697 $ 13 $ — $ 33,683 Liabilities: Interest rate swap $ 43,319 $ — $ 43,319 $ 13 $ 42,746 $ 560 Securities sold under agreements to repurchase 173,061 — 173,061 — 173,061 — 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 March 31, 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 $43.3 million . Further, the Company has minimum collateral posting thresholds with certain of its derivative counterparties and has posted collateral of $43.3 million

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 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 March 31, 2020 and December 31, 2019 , segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value: March 31, 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 $ — $ 10,230 $ — $ 10,230 Obligations of states and political subdivisions — 254,031 — 254,031 Agency mortgage-backed securities — 886,667 — 886,667 U.S. Treasury bills — 10,586 — 10,586 Total securities available for sale — 1,161,514 — 1,161,514 Derivatives — 33,697 — 33,697 Total assets $ — $ 1,195,211 $ — $ 1,195,211 Liabilities Derivatives $ — $ 43,319 $ — $ 43,319 Total liabilities $ — $ 43,319 $ — $ 43,319 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) Impaired loans $ 288 $ — $ — $ 288 Other real estate 3,902 — — 3,902 Total $ 4,190 $ — $ — $ 4,190 (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 March 31, 2020 and December 31, 2019 . March 31, 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 178,932 178,081 Level 2 181,166 181,939 Level 2 Other investments 41,703 41,703 Level 2 38,044 38,044 Level 2 Loans held for sale 8,430 8,430 Level 2 5,570 5,570 Level 2 Loans, net 5,365,330 5,255,133 Level 3 5,271,049 5,205,651 Level 3 State tax credits, held for sale 39,521 44,539 Level 3 36,802 39,046 Level 3 Balance sheet liabilities Certificates of deposit 765,904 772,208 Level 3 826,447 825,203 Level 3 Subordinated debentures and notes 141,336 127,064 Level 2 141,258 130,985 Level 2 FHLB advances 222,000 223,074 Level 2 222,406 221,402 Level 2 Other borrowings 205,918 205,894 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 Securities and Exchange Commission.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	3 Months Ended
	Mar. 31, 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, December 31, 2019 $ 14,977 $ 4,934 $ (2,162 ) $ 17,749 Net change 10,561 (156 ) (5,057 ) 5,348 Balance, March 31, 2020 $ 25,538 $ 4,778 $ (7,219 ) $ 23,097 (in thousands) Net Unrealized Gain (Loss) on Available-for-Sale Debt Securities Unamortized Gain (Loss) on Held-to-Maturity Securities Net Unrealized Loss on Cash Flow Hedges Total Balance, December 31, 2018 $ (9,047 ) $ (235 ) $ — $ (9,282 ) Net change 11,722 2 (952 ) 10,772 Balance, March 31, 2019 $ 2,675 $ (233 ) $ (952 ) $ 1,490 The following table presents the pre-tax and after-tax changes in the components of other comprehensive income: Three months ended March 31, (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 $ 14,029 $ 3,465 $ 10,564 $ 15,275 $ 3,773 $ 11,502 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) (207 ) (51 ) (156 ) 3 1 2 Change in unrealized loss on cash flow hedges arising during the period (6,879 ) (1,699 ) (5,180 ) (1,264 ) (312 ) (952 ) Reclassification of loss on cash flow hedges (b) 163 40 123 — — — Total other comprehensive income $ 7,102 $ 1,754 $ 5,348 $ 14,306 $ 3,534 $ 10,772 (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)	3 Months Ended
	Mar. 31, 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 in the initial fiscal year of adoption. 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, 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 $16.7 million at March 31, 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 significant 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. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. 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 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. 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 March 31, 2020

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 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)	3 Months Ended
	Mar. 31, 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 March 31, (in thousands, except per share data) 2020 2019 Net income as reported $ 12,868 $ 16,156 Weighted average common shares outstanding 26,473 23,927 Additional dilutive common stock equivalents 66 156 Weighted average diluted common shares outstanding 26,539 24,083 Basic earnings per common share: $ 0.49 $ 0.68 Diluted earnings per common share: 0.48 0.67

Investments (Tables)

Investments (Tables)	3 Months Ended
	Mar. 31, 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 and fair value of securities available for sale and held to maturity: March 31, 2020 (in thousands) Amortized Cost Gross Gross Allowance for Credit Losses Fair Value Available-for-sale securities: Obligations of U.S. Government-sponsored enterprises $ 9,960 $ 270 $ — $ — $ 10,230 Obligations of states and political subdivisions 243,863 10,373 (205 ) — 254,031 Agency mortgage-backed securities 863,698 23,465 (496 ) — 886,667 U.S. Treasury bills 9,973 613 — — 10,586 Total securities available for sale $ 1,127,494 $ 34,721 $ (701 ) $ — $ 1,161,514 Held-to-maturity securities: Obligations of states and political subdivisions $ 11,688 $ 153 $ — $ (1 ) $ 11,840 Agency mortgage-backed securities 44,720 1,924 — — 46,644 Corporate debt securities 122,827 162 (3,090 ) (302 ) 119,597 Total securities held-to-maturity $ 179,235 $ 2,239 $ (3,090 ) $ (303 ) $ 178,081 Less: Allowance for credit losses 303 Total securities held-to-maturity, net $ 178,932 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 and fair value of securities available for sale and held to maturity: March 31, 2020 (in thousands) Amortized Cost Gross Gross Allowance for Credit Losses Fair Value Available-for-sale securities: Obligations of U.S. Government-sponsored enterprises $ 9,960 $ 270 $ — $ — $ 10,230 Obligations of states and political subdivisions 243,863 10,373 (205 ) — 254,031 Agency mortgage-backed securities 863,698 23,465 (496 ) — 886,667 U.S. Treasury bills 9,973 613 — — 10,586 Total securities available for sale $ 1,127,494 $ 34,721 $ (701 ) $ — $ 1,161,514 Held-to-maturity securities: Obligations of states and political subdivisions $ 11,688 $ 153 $ — $ (1 ) $ 11,840 Agency mortgage-backed securities 44,720 1,924 — — 46,644 Corporate debt securities 122,827 162 (3,090 ) (302 ) 119,597 Total securities held-to-maturity $ 179,235 $ 2,239 $ (3,090 ) $ (303 ) $ 178,081 Less: Allowance for credit losses 303 Total securities held-to-maturity, net $ 178,932 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 March 31, 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 $ 2,018 $ 2,054 $ — $ — Due after one year through five years 26,301 27,369 4,444 4,503 Due after five years through ten years 10,205 10,576 130,071 126,934 Due after ten years 225,272 234,848 — — Agency mortgage-backed securities 863,698 886,667 44,720 46,644 $ 1,127,494 $ 1,161,514 $ 179,235 $ 178,081
Schedule of Unrealized Loss on Investments	The following table represents a summary of available-for-sale investment securities that had an unrealized loss: March 31, 2020 Less than 12 months 12 months or more Total (in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Obligations of states and political subdivisions $ 10,475 $ 205 $ — $ — $ 10,475 $ 205 Agency mortgage-backed securities 82,614 415 5,198 81 87,812 496 $ 93,089 $ 620 $ 5,198 $ 81 $ 98,287 $ 701 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)	3 Months Ended
	Mar. 31, 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: March 31, 2020 (in thousands) Performing Non Performing Total Commercial and industrial $ 15,060 $ 71 $ 15,131 Real estate: Residential 944 — 944 Consumer and other 2,465 56 2,521 Total $ 18,469 $ 127 $ 18,596 The recorded investment by risk category of the loans by class at March 31, 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) $ 274,021 $ 623,511 $ 328,712 $ 188,489 $ 53,064 $ 126,446 $ 2,557 $ 660,675 $ 2,257,475 Watch (7) 780 17,643 5,258 11,986 23,454 524 506 66,449 126,600 Classified (8-9) 649 20,887 8,438 3,881 5,253 3,581 431 26,687 69,807 Total Commercial and industrial $ 275,450 $ 662,041 $ 342,408 $ 204,356 $ 81,771 $ 130,551 $ 3,494 $ 753,811 $ 2,453,882 Commercial real estate-investor owned Pass (1-6) $ 114,369 $ 356,099 $ 229,830 $ 154,406 $ 173,623 $ 204,948 $ 1,745 $ 52,875 $ 1,287,895 Watch (7) 113 10,395 1,305 400 12,614 1,623 — — 26,450 Classified (8-9) — 978 8,043 445 246 3,757 — — 13,469 Total Commercial real estate-investor owned $ 114,482 $ 367,472 $ 239,178 $ 155,251 $ 186,483 $ 210,328 $ 1,745 $ 52,875 $ 1,327,814 Commercial real estate-owner occupied Pass (1-6) $ 50,382 $ 226,562 $ 99,918 $ 89,750 $ 58,499 $ 96,149 $ 2,797 $ 44,271 $ 668,328 Watch (7) 2,775 8,802 370 9,904 8,641 5,313 — 5,900 41,705 Classified (8-9) — 1,131 5,212 — — 4,167 — — 10,510 Total Commercial real estate-owner occupied $ 53,157 $ 236,495 $ 105,500 $ 99,654 $ 67,140 $ 105,629 $ 2,797 $ 50,171 $ 720,543 Construction real estate Pass (1-6) $ 23,035 $ 184,561 $ 123,931 $ 63,034 $ 28,407 $ 14,672 $ — $ 17,410 $ 455,050 Watch (7) 966 11,448 1,262 69 — 563 — — 14,308 Classified (8-9) — 226 — — — 43 — — 269 Total Construction real estate $ 24,001 $ 196,235 $ 125,193 $ 63,103 $ 28,407 $ 15,278 $ — $ 17,410 $ 469,627 Residential real estate Pass (1-6) $ 12,356 $ 37,811 $ 23,381 $ 24,306 $ 38,082 $ 132,715 $ 245 $ 65,660 $ 334,556 Watch (7) 1 1,045 875 — 4 2,683 — 1,093 5,701 Classified (8-9) — 1,715 767 13 131 2,882 — 49 5,557 Total residential real estate $ 12,357 $ 40,571 $ 25,023 $ 24,319 $ 38,217 $ 138,280 $ 245 $ 66,802 $ 345,814 Consumer and other Pass (1-6) $ 1,257 $ 26,478 $ 20,911 $ 1,735 $ 5,535 $ 35,940 $ — $ 29,311 $ 121,167 Watch (7) — 2 — — — 1 — 1 4 Classified (8-9) — 2 4 6 — 24 10 24 70 Total consumer and other $ 1,257 $ 26,482 $ 20,915 $ 1,741 $ 5,535 $ 35,965 $ 10 $ 29,336 $ 121,241
Portfolio loans, net
Non-covered Loans [Line Items]
Summary of Portfolio Loans by Category	Below is a summary of loans by category at March 31, 2020 and December 31, 2019 : (in thousands) March 31, 2020 December 31, 2019 Commercial and industrial $ 2,469,013 2,361,157 Real estate: Commercial - investor owned 1,327,814 1,299,884 Commercial - owner occupied 720,543 697,437 Construction and land development 469,627 457,273 Residential 346,758 366,261 Total real estate loans 2,864,742 2,820,855 Consumer and other 126,212 134,941 Loans, before unearned loan fees 5,459,967 5,316,953 Unearned loan fees, net (2,450 ) (2,616 ) Loans, including unearned loan fees $ 5,457,517 $ 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 through March 31, 2020 is as follows: (in thousands) Commercial and industrial CRE - investor owned CRE - owner occupied Construction and land development Residential real estate Consumer and 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 11,591 3,224 1,994 2,309 2,011 566 21,695 Charge-offs (63 ) (2 ) — (31 ) (122 ) (86 ) (304 ) Recoveries 504 14 69 40 157 17 801 Balance at March 31, 2020 $ 45,981 $ 19,892 $ 9,477 $ 9,895 $ 5,395 $ 1,547 $ 92,187
Financing Receivable, Noncurrent, Allowance for Credit Loss	A summary of the activity in the ACLL by category through March 31, 2020 is as follows: (in thousands) Commercial and industrial CRE - investor owned CRE - owner occupied Construction and land development Residential real estate Consumer and 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 11,591 3,224 1,994 2,309 2,011 566 21,695 Charge-offs (63 ) (2 ) — (31 ) (122 ) (86 ) (304 ) Recoveries 504 14 69 40 157 17 801 Balance at March 31, 2020 $ 45,981 $ 19,892 $ 9,477 $ 9,895 $ 5,395 $ 1,547 $ 92,187
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 March 31, 2020 and December 31, 2019 , is as follows: March 31, 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 $ 22,729 $ 3,731 $ 71 $ 26,531 $ 17,915 Real estate: Commercial - investor owned 4,115 — — 4,115 2,576 Commercial - owner occupied 2,110 — — 2,110 1,114 Construction and land development 214 — — 214 214 Residential 4,075 79 — 4,154 3,086 Consumer and other 25 — 55 80 — Total $ 33,268 $ 3,810 $ 126 $ 37,204 $ 24,905 There was no interest income recognized on nonaccrual loans in the first quarter 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 Consumer and 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 March 31, 2020: Type of Collateral (in thousands) Commercial Real Estate Residential Real Estate Blanket Lien Commercial and industrial $ 13,051 $ — $ 5,910 Real estate: Commercial - investor owned 4,115 — — Commercial - owner occupied 1,521 — — Construction and land development — 214 — Residential — 3,927 — Total $ 18,687 $ 4,141 $ 5,910
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 March 31, 2020: Type of Collateral (in thousands) Commercial Real Estate Residential Real Estate Blanket Lien Commercial and industrial $ 13,051 $ — $ 5,910 Real estate: Commercial - investor owned 4,115 — — Commercial - owner occupied 1,521 — — Construction and land development — 214 — Residential — 3,927 — Total $ 18,687 $ 4,141 $ 5,910 The recorded investment by category for loans restructured during the three months ended March 31, 2020 is as follows: March 31, 2020 (in thousands, except for number of loans) Number of loans Pre-Modification Outstanding Recorded Balance Post-Modification Outstanding Recorded Balance Commercial and industrial 1 $ 3,731 $ 3,731 Real estate: Residential 2 155 155 Total 3 $ 3,886 $ 3,886
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 months ended March 31, 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 March 31, 2020 is shown below. March 31, 2020 (in thousands) 30-89 Days Past Due 90 or More Past Due Total Past Due Current Total Commercial and industrial $ 24,898 $ 9,491 $ 34,389 $ 2,434,624 $ 2,469,013 Real estate: Commercial - investor owned 1,996 3,438 5,434 1,322,380 1,327,814 Commercial - owner occupied 3,870 1,182 5,052 715,491 720,543 Construction and land development 95 — 95 469,532 469,627 Residential 5,124 1,482 6,606 340,152 346,758 Consumer and other 459 75 534 123,228 123,762 Total $ 36,442 $ 15,668 $ 52,110 $ 5,405,407 $ 5,457,517
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 March 31, 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) $ 274,021 $ 623,511 $ 328,712 $ 188,489 $ 53,064 $ 126,446 $ 2,557 $ 660,675 $ 2,257,475 Watch (7) 780 17,643 5,258 11,986 23,454 524 506 66,449 126,600 Classified (8-9) 649 20,887 8,438 3,881 5,253 3,581 431 26,687 69,807 Total Commercial and industrial $ 275,450 $ 662,041 $ 342,408 $ 204,356 $ 81,771 $ 130,551 $ 3,494 $ 753,811 $ 2,453,882 Commercial real estate-investor owned Pass (1-6) $ 114,369 $ 356,099 $ 229,830 $ 154,406 $ 173,623 $ 204,948 $ 1,745 $ 52,875 $ 1,287,895 Watch (7) 113 10,395 1,305 400 12,614 1,623 — — 26,450 Classified (8-9) — 978 8,043 445 246 3,757 — — 13,469 Total Commercial real estate-investor owned $ 114,482 $ 367,472 $ 239,178 $ 155,251 $ 186,483 $ 210,328 $ 1,745 $ 52,875 $ 1,327,814 Commercial real estate-owner occupied Pass (1-6) $ 50,382 $ 226,562 $ 99,918 $ 89,750 $ 58,499 $ 96,149 $ 2,797 $ 44,271 $ 668,328 Watch (7) 2,775 8,802 370 9,904 8,641 5,313 — 5,900 41,705 Classified (8-9) — 1,131 5,212 — — 4,167 — — 10,510 Total Commercial real estate-owner occupied $ 53,157 $ 236,495 $ 105,500 $ 99,654 $ 67,140 $ 105,629 $ 2,797 $ 50,171 $ 720,543 Construction real estate Pass (1-6) $ 23,035 $ 184,561 $ 123,931 $ 63,034 $ 28,407 $ 14,672 $ — $ 17,410 $ 455,050 Watch (7) 966 11,448 1,262 69 — 563 — — 14,308 Classified (8-9) — 226 — — — 43 — — 269 Total Construction real estate $ 24,001 $ 196,235 $ 125,193 $ 63,103 $ 28,407 $ 15,278 $ — $ 17,410 $ 469,627 Residential real estate Pass (1-6) $ 12,356 $ 37,811 $ 23,381 $ 24,306 $ 38,082 $ 132,715 $ 245 $ 65,660 $ 334,556 Watch (7) 1 1,045 875 — 4 2,683 — 1,093 5,701 Classified (8-9) — 1,715 767 13 131 2,882 — 49 5,557 Total residential real estate $ 12,357 $ 40,571 $ 25,023 $ 24,319 $ 38,217 $ 138,280 $ 245 $ 66,802 $ 345,814 Consumer and other Pass (1-6) $ 1,257 $ 26,478 $ 20,911 $ 1,735 $ 5,535 $ 35,940 $ — $ 29,311 $ 121,167 Watch (7) — 2 — — — 1 — 1 4 Classified (8-9) — 2 4 6 — 24 10 24 70 Total consumer and other $ 1,257 $ 26,482 $ 20,915 $ 1,741 $ 5,535 $ 35,965 $ 10 $ 29,336 $ 121,241 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: March 31, 2020 (in thousands) Performing Non Performing Total Commercial and industrial $ 15,060 $ 71 $ 15,131 Real estate: Residential 944 — 944 Consumer and other 2,465 56 2,521 Total $ 18,469 $ 127 $ 18,596 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 Consumer and 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 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. As of April 30, 2020, $392.1 million loans have participated in the programs, including $190.8 million loans deferring interest payments of $2.2 million . In addition, the Company has been actively participating in the PPP since the SBA began accepting applications in April 2020. In the second quarter 2020, the Company expects to fund $856.5 million in PPP loans that have been approved by the SBA.

Commitments (Tables)

Commitments (Tables)	3 Months Ended
	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Schedule of Commitments	The contractual amounts of off-balance-sheet financial instruments as of March 31, 2020 , and December 31, 2019 , are as follows: (in thousands) March 31, 2020 December 31, 2019 Commitments to extend credit $ 1,411,151 $ 1,469,413 Letters of credit 50,981 47,969

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	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 March 31, 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 March 31, 2020 Gross Amounts Not Offset in the Statement of Financial Position (in thousands) Gross Amounts Recognized Gross Amounts Offset in the Statement of Financial Position Net Amounts of Assets presented in the Statement of Financial Position Financial Instruments Fair Value Collateral Posted Net Amount Assets: Interest rate swap $ 33,697 $ — $ 33,697 $ 13 $ — $ 33,683 Liabilities: Interest rate swap $ 43,319 $ — $ 43,319 $ 13 $ 42,746 $ 560 Securities sold under agreements to repurchase 173,061 — 173,061 — 173,061 — 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 — Derivative Assets Derivative Liabilities March 31, 2020 December 31, 2019 March 31, 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 $ 9,587 Other Liabilities $ 2,872 Total $ — $ — $ 9,587 $ 2,872 Derivatives not Designated as Hedging Instruments Interest rate swap $ 842,899 Other Assets $ 33,697 $ 749,819 Other Assets $ 11,055 Other Liabilities $ 33,732 Other Liabilities $ 11,875 Total $ 33,697 $ 11,055 $ 33,732 $ 11,875

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 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 March 31, 2020 and December 31, 2019 , segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value: March 31, 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 $ — $ 10,230 $ — $ 10,230 Obligations of states and political subdivisions — 254,031 — 254,031 Agency mortgage-backed securities — 886,667 — 886,667 U.S. Treasury bills — 10,586 — 10,586 Total securities available for sale — 1,161,514 — 1,161,514 Derivatives — 33,697 — 33,697 Total assets $ — $ 1,195,211 $ — $ 1,195,211 Liabilities Derivatives $ — $ 43,319 $ — $ 43,319 Total liabilities $ — $ 43,319 $ — $ 43,319 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) Impaired loans $ 288 $ — $ — $ 288 Other real estate 3,902 — — 3,902 Total $ 4,190 $ — $ — $ 4,190 (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 March 31, 2020 and December 31, 2019 . March 31, 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 178,932 178,081 Level 2 181,166 181,939 Level 2 Other investments 41,703 41,703 Level 2 38,044 38,044 Level 2 Loans held for sale 8,430 8,430 Level 2 5,570 5,570 Level 2 Loans, net 5,365,330 5,255,133 Level 3 5,271,049 5,205,651 Level 3 State tax credits, held for sale 39,521 44,539 Level 3 36,802 39,046 Level 3 Balance sheet liabilities Certificates of deposit 765,904 772,208 Level 3 826,447 825,203 Level 3 Subordinated debentures and notes 141,336 127,064 Level 2 141,258 130,985 Level 2 FHLB advances 222,000 223,074 Level 2 222,406 221,402 Level 2 Other borrowings 205,918 205,894 Level 2 265,172 265,172 Level 2

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 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, December 31, 2019 $ 14,977 $ 4,934 $ (2,162 ) $ 17,749 Net change 10,561 (156 ) (5,057 ) 5,348 Balance, March 31, 2020 $ 25,538 $ 4,778 $ (7,219 ) $ 23,097 (in thousands) Net Unrealized Gain (Loss) on Available-for-Sale Debt Securities Unamortized Gain (Loss) on Held-to-Maturity Securities Net Unrealized Loss on Cash Flow Hedges Total Balance, December 31, 2018 $ (9,047 ) $ (235 ) $ — $ (9,282 ) Net change 11,722 2 (952 ) 10,772 Balance, March 31, 2019 $ 2,675 $ (233 ) $ (952 ) $ 1,490
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 March 31, (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 $ 14,029 $ 3,465 $ 10,564 $ 15,275 $ 3,773 $ 11,502 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) (207 ) (51 ) (156 ) 3 1 2 Change in unrealized loss on cash flow hedges arising during the period (6,879 ) (1,699 ) (5,180 ) (1,264 ) (312 ) (952 ) Reclassification of loss on cash flow hedges (b) 163 40 123 — — — Total other comprehensive income $ 7,102 $ 1,754 $ 5,348 $ 14,306 $ 3,534 $ 10,772 (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	Mar. 31, 2020USD ($)
Other Assets
Property, Plant and Equipment [Line Items]
Accrued interest receivable	$ 16.7

Summary of Significant Accoun_5

Summary of Significant Accounting Policies Schedule of Impact of Adoption of New Accounting Standard (Details) - USD ($) $ in Thousands	Mar. 31, 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	$ (303)	0
Deferred tax asset		14,851
Retained earnings	$ 370,748	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
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Net income as reported	$ 12,868	$ 16,156
Weighted average common shares outstanding (in shares)	26,473,000	23,927,000
Additional dilutive common stock equivalents (in shares)	66,000	156,000
Weighted average diluted common shares outstanding (in shares)	26,539,000	24,083,000
Basic earnings per common share (in dollars per share)	$ 0.49	$ 0.68
Diluted earnings per common share (in dollars per share)	$ 0.48	$ 0.67
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	62,000	122,000

Investments - Schedule of Avail

Investments - Schedule of Available-for-sale and Held-to-Maturity Securities Reconciliation (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	$ 179,235		$ 181,166
Gross Unrealized Gains	2,239		973
Gross Unrealized Losses	(3,090)		(200)
Allowance for Credit Losses	303	$ 0
Fair Value	178,081		181,939
Total securities held-to-maturity, net	178,932		181,166
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	1,127,494		1,115,323
Gross Unrealized Gains	34,721		21,548
Gross Unrealized Losses	(701)		(1,554)
Allowance for Credit Losses	0
Fair Value	1,161,514		1,135,317
Obligations of U.S. Government-sponsored enterprises
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	9,960		9,954
Gross Unrealized Gains	270		92
Gross Unrealized Losses	0		0
Allowance for Credit Losses	0
Fair Value	10,230		10,046
Obligations of states and political subdivisions
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	11,688		11,704
Gross Unrealized Gains	153		170
Gross Unrealized Losses	0		0
Allowance for Credit Losses	1
Fair Value	11,840		11,874
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	243,863		207,269
Gross Unrealized Gains	10,373		6,118
Gross Unrealized Losses	(205)		(363)
Allowance for Credit Losses	0
Fair Value	254,031		213,024
Agency mortgage-backed securities
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	44,720		46,346
Gross Unrealized Gains	1,924		675
Gross Unrealized Losses	0		0
Allowance for Credit Losses	0
Fair Value	46,644		47,021
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	863,698		888,129
Gross Unrealized Gains	23,465		15,083
Gross Unrealized Losses	(496)		(1,191)
Allowance for Credit Losses	0
Fair Value	886,667		902,021
US Treasury Bill Securities [Member]
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	9,973		9,971
Gross Unrealized Gains	613		255
Gross Unrealized Losses	0		0
Allowance for Credit Losses	0
Fair Value	10,586		10,226
Corporate Debt Securities [Member]
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	122,827		123,116
Gross Unrealized Gains	162		128
Gross Unrealized Losses	(3,090)		(200)
Allowance for Credit Losses	302
Fair Value	$ 119,597		$ 123,044

Investments - Investments Class

Investments - Investments Classified by Contractual Maturity Date (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Available for sale, Amortized Cost
Due in one year or less	$ 2,018
Due after one year through five years	26,301
Due after five years through ten years	10,205
Due after ten years	225,272
Agency mortgage-backed securities	863,698
Amortized Cost	1,127,494	$ 1,115,323
Available for sale, Estimated Fair Value
Due in one year or less	2,054
Due after one year through five years	27,369
Due after five years through ten years	10,576
Due after ten years	234,848
Agency mortgage-backed securities	886,667
Available for sale, fair value	1,161,514	1,135,317
Held to maturity, Amortized Cost
Due in one year or less	0
Due after one year through five years	4,444
Due after five years through ten years	130,071
Due after ten years	0
Agency mortgage-backed securities	44,720
Amortized Cost	179,235	181,166
Held to maturity, Estimated Fair Value
Due in one year or less	0
Due after one year through five years	4,503
Due after five years through ten years	126,934
Due after ten years	0
Agency mortgage-backed securities	46,644
Held to maturity, fair value	$ 178,081	$ 181,939

Investments - Schedule of Unrea

Investments - Schedule of Unrealized Loss on Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 93,089	$ 255,984
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	620	1,319
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	5,198	41,491
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	81	435
Debt Securities, Available-for-sale, Unrealized Loss Position	98,287	297,475
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	701	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	10,475	56,327
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	205	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	10,475	56,327
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	205	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	82,614	131,693
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	415	756
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	5,198	41,491
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	81	435
Debt Securities, Available-for-sale, Unrealized Loss Position	87,812	173,184
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 496	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	3 Months Ended
	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Maximum percentage of shareholders' equity security holdings held of one issuer	10.00%		10.00%
Securities pledged	$ 431,700		$ 484,800
Mortgage-backed securities, weighted average life	3 years
Accrued interest receivable, available-for-sale securities	$ 4,500
Accrued interest receivable, held-to-maturity securities	1,400
Allowance for credit losses on held-to-maturity debt securities	$ 303	$ 0

Loans - Summary of Portfolio Lo

Loans - Summary of Portfolio Loans by Category (Details) - Portfolio loans, net - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	$ 5,459,967	$ 5,316,953
Unearned loan fees, net	(2,450)	(2,616)
Loans, including unearned loan fees	5,457,517	5,314,337
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	2,469,013	2,361,157
Loans, including unearned loan fees	2,469,013
Commercial - investor owned
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	1,327,814	1,299,884
Loans, including unearned loan fees	1,327,814
Commercial - owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	720,543	697,437
Loans, including unearned loan fees	720,543
Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	469,627	457,273
Loans, including unearned loan fees	469,627
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	346,758	366,261
Loans, including unearned loan fees	346,758
Total real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	2,864,742	2,820,855
Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	126,212	$ 134,941
Loans, including unearned loan fees	$ 123,762

Loans - Summary of Allowance fo

Loans - Summary of Allowance for Loan Losses by Portfolio Class and Category (Details) - USD ($) $ in Thousands	Jan. 01, 2020	Mar. 31, 2020	Mar. 31, 2019
Allowance for Loan Losses [Roll Forward]
Balance	$ 43,288
Portfolio loans, net
Allowance for Loan Losses [Roll Forward]
Balance at December 31, 2019	43,288	$ 43,288
Provision for credit losses	(1,680)	21,695	$ 1,500
Charge-offs		(304)
Recoveries		801
Balance	69,995	92,187
Portfolio loans, net | Commercial and industrial
Allowance for Loan Losses [Roll Forward]
Balance at December 31, 2019	27,455	27,455
Provision for credit losses	0	11,591
Charge-offs		(63)
Recoveries		504
Balance	33,949	45,981
Portfolio loans, net | CRE - investor owned
Allowance for Loan Losses [Roll Forward]
Balance at December 31, 2019	5,935	5,935
Provision for credit losses	(5)	3,224
Charge-offs		(2)
Recoveries		14
Balance	16,656	19,892
Portfolio loans, net | CRE - owner occupied
Allowance for Loan Losses [Roll Forward]
Balance at December 31, 2019	4,873	4,873
Provision for credit losses	(57)	1,994
Charge-offs		0
Recoveries		69
Balance	7,414	9,477
Portfolio loans, net | Construction and land development
Allowance for Loan Losses [Roll Forward]
Balance at December 31, 2019	2,611	2,611
Provision for credit losses	(217)	2,309
Charge-offs		(31)
Recoveries		40
Balance	7,577	9,895
Portfolio loans, net | Residential real estate
Allowance for Loan Losses [Roll Forward]
Balance at December 31, 2019	1,280	1,280
Provision for credit losses	(1,401)	2,011
Charge-offs		(122)
Recoveries		157
Balance	3,349	5,395
Portfolio loans, net | Consumer and other
Allowance for Loan Losses [Roll Forward]
Balance at December 31, 2019	1,134	1,134
Provision for credit losses	0	566
Charge-offs		(86)
Recoveries		17
Balance	$ 1,050	$ 1,547

Loans - Summary of Recorded Inv

Loans - Summary of Recorded Investment in Portfolio Loans by Class and Category Based on Impairment Method (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020USD ($)loan	Jan. 01, 2020USD ($)	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
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 3,886
Financing Receivable, Troubled Debt Restructuring, Premodification	3,886
Total	92,187	69,995	$ 43,288
Loans - Ending balance:
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums	(2,450)		(2,616)
Total	$ 5,459,967		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
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 3,731
Financing Receivable, Troubled Debt Restructuring, Premodification	3,731
Total	45,981	33,949	27,455
Loans - Ending balance:
Total	2,469,013		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	19,892	16,656	5,935
Loans - Ending balance:
Total	1,327,814		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]
Total	9,477	7,414	4,873
Loans - Ending balance:
Total	720,543		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	9,895	7,577	2,611
Loans - Ending balance:
Total	$ 469,627		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
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 155
Financing Receivable, Troubled Debt Restructuring, Premodification	155
Total	5,395	3,349	1,280
Loans - Ending balance:
Total	346,758		366,261
Portfolio loans, net | Consumer and other
Summary of Recorded Investment in Non-covered Loans by Portfolio Class and Category Based on Impairment Method [Line Items]
Total	1,547	$ 1,050	1,134
Loans - Ending balance:
Total	$ 126,212		$ 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	Mar. 31, 2020	Mar. 31, 2019	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		$ 24,905
Total Recorded Investment		37,204		$ 26,425
Financing Receivable, Allowance for Credit Loss, Writeoff		(304)
Financing Receivable, Allowance for Credit Loss, Recovery		801
Financing receivable, allowance for credit loss	69,995	92,187		43,288
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	28,387
Provision for credit losses	1,680	(21,695)	$ (1,500)
Portfolio loans, net | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance		17,915
Total Recorded Investment		26,531		22,578
Financing Receivable, Allowance for Credit Loss, Writeoff		(63)
Financing Receivable, Allowance for Credit Loss, Recovery		504
Financing receivable, allowance for credit loss	33,949	45,981		27,455
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	6,494
Provision for credit losses	0	(11,591)
Portfolio loans, net | Commercial - investor owned
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance		2,576
Total Recorded Investment		4,115		2,303
Financing Receivable, Allowance for Credit Loss, Writeoff		(2)
Financing Receivable, Allowance for Credit Loss, Recovery		14
Financing receivable, allowance for credit loss	16,656	19,892		5,935
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	10,726
Provision for credit losses	5	(3,224)
Portfolio loans, net | Commercial - owner occupied
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance		1,114
Total Recorded Investment		2,110		213
Financing Receivable, Allowance for Credit Loss, Writeoff		0
Financing Receivable, Allowance for Credit Loss, Recovery		69
Financing receivable, allowance for credit loss	7,414	9,477		4,873
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	2,598
Provision for credit losses	57	(1,994)
Portfolio loans, net | Construction and land development
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance		214
Total Recorded Investment		214
Financing Receivable, Allowance for Credit Loss, Writeoff		(31)
Financing Receivable, Allowance for Credit Loss, Recovery		40
Financing receivable, allowance for credit loss	7,577	9,895		2,611
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	5,183
Provision for credit losses	217	(2,309)
Portfolio loans, net | Residential real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance		3,086
Total Recorded Investment		4,154		1,330
Financing Receivable, Allowance for Credit Loss, Writeoff		(122)
Financing Receivable, Allowance for Credit Loss, Recovery		157
Financing receivable, allowance for credit loss	3,349	5,395		1,280
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	3,470
Provision for credit losses	1,401	(2,011)
Portfolio loans, net | Consumer and other
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance		0
Total Recorded Investment		80		1
Financing Receivable, Allowance for Credit Loss, Writeoff		(86)
Financing Receivable, Allowance for Credit Loss, Recovery		17
Financing receivable, allowance for credit loss	1,050	1,547		$ 1,134
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(84)
Provision for credit losses	$ 0	$ (566)

Loans - Narrative (Details)

Loans - Narrative (Details)	Jan. 01, 2020USD ($)	Mar. 31, 2020USD ($)loan	Mar. 31, 2019USD ($)	Jun. 30, 2020USD ($)	Apr. 30, 2020USD ($)	Dec. 31, 2019USD ($)loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Purchased with Credit Deterioration, Discount (Premium)		$ 24,500,000
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					$ 392,100,000
Financing Receivable, Amount Eligible for Deferral of Both Principal and Interest					190,800,000
Loans and Leases Receivable, Deferred Income					$ 2,200,000
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available		2,700,000,000
Financing receivable, allowance for credit loss	$ 43,288,000
Financing Receivable, Paycheck Protection Program				$ 856,500,000
Unadvanced Commitment on Impaired Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Estimated losses attributable to unadvanced commitments on impaired loans		3,700,000				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)	21,695,000	$ 1,500,000
Financing Receivable, Allowance for Credit Loss, Threshold of Loans Written Off	100,000
Post-Modification Outstanding Recorded Balance		$ 3,886,000
Financing Receivable, Modifications, Number of Contracts | loan		3
Restructuring Reserve		$ 3,810,000				79,000
Financing Receivable, before Allowance for Credit Loss		5,459,967,000				5,316,953,000
Financing receivable, allowance for credit loss	69,995,000	92,187,000				43,288,000
Non-Covered Loans | Consumer and 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	566,000
Restructuring Reserve		0				0
Financing Receivable, before Allowance for Credit Loss		126,212,000				134,941,000
Financing receivable, allowance for credit loss	1,050,000	1,547,000				1,134,000
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		$ 2,200,000

Loans - Summary of Recorded I_2

Loans - Summary of Recorded Investment in Impaired Portfolio Loans by Category (Details) - Non-Covered Loans $ in Thousands	3 Months Ended
	Mar. 31, 2020USD ($)loan	Dec. 31, 2019USD ($)
Financing Receivable, Past Due [Line Items]
Total Recorded Investment	$ 37,204	$ 26,425
Recorded Investment With No Allowance	$ 24,905
Financing Receivable, Modifications, Number of Contracts | loan	3
Nonaccrual	$ 33,268	26,096
Restructured, accruing	3,810	79
Impaired Financing Receivables, Recorded Investment, 90 Days Past Due and Still Accruing	126	250
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Recorded Investment	26,531	22,578
Recorded Investment With No Allowance	$ 17,915
Financing Receivable, Modifications, Number of Contracts | loan	1
Nonaccrual	$ 22,729	22,328
Restructured, accruing	3,731	0
Impaired Financing Receivables, Recorded Investment, 90 Days Past Due and Still Accruing	71	250
Commercial - investor owned
Financing Receivable, Past Due [Line Items]
Total Recorded Investment	4,115	2,303
Recorded Investment With No Allowance	2,576
Nonaccrual	4,115	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	2,110	213
Recorded Investment With No Allowance	1,114
Nonaccrual	2,110	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	214
Recorded Investment With No Allowance	214
Nonaccrual	214
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	4,154	1,330
Recorded Investment With No Allowance	$ 3,086
Financing Receivable, Modifications, Number of Contracts | loan	2
Nonaccrual	$ 4,075	1,251
Restructured, accruing	79	79
Impaired Financing Receivables, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Consumer and other
Financing Receivable, Past Due [Line Items]
Total Recorded Investment	80	1
Recorded Investment With No Allowance	0
Nonaccrual	25	1
Restructured, accruing	0	0
Impaired Financing Receivables, Recorded Investment, 90 Days Past Due and Still Accruing	$ 55	$ 0

Loans - Summary of Recorded I_3

Loans - Summary of Recorded Investment by Category for Portfolio Loans Restructured (Details) - Non-Covered Loans $ in Thousands	3 Months Ended
	Mar. 31, 2020USD ($)loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	3
Pre-Modification Outstanding Recorded Balance	$ 3,886
Post-Modification Outstanding Recorded Balance	$ 3,886
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	1
Pre-Modification Outstanding Recorded Balance	$ 3,731
Post-Modification Outstanding Recorded Balance	$ 3,731
Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	2
Pre-Modification Outstanding Recorded Balance	$ 155
Post-Modification Outstanding Recorded Balance	$ 155

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	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Total Past Due	$ 52,110
Current	5,405,407
Loans, including unearned loan fees	5,457,517	$ 5,314,337
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Past Due	34,389
Current	2,434,624
Loans, including unearned loan fees	2,469,013
CRE - investor owned
Financing Receivable, Past Due [Line Items]
Total Past Due	5,434
Current	1,322,380
Loans, including unearned loan fees	1,327,814
CRE - owner occupied
Financing Receivable, Past Due [Line Items]
Total Past Due	5,052
Current	715,491
Loans, including unearned loan fees	720,543
Construction and land development
Financing Receivable, Past Due [Line Items]
Total Past Due	95
Current	469,532
Loans, including unearned loan fees	469,627
Residential real estate
Financing Receivable, Past Due [Line Items]
Total Past Due	6,606
Current	340,152
Loans, including unearned loan fees	346,758
Consumer and other
Financing Receivable, Past Due [Line Items]
Total Past Due	534
Current	123,228
Loans, including unearned loan fees	123,762
Financial Asset, 30 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due	36,442
Financial Asset, 30 to 89 Days Past Due [Member] | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Past Due	24,898
Financial Asset, 30 to 89 Days Past Due [Member] | CRE - investor owned
Financing Receivable, Past Due [Line Items]
Total Past Due	1,996
Financial Asset, 30 to 89 Days Past Due [Member] | CRE - owner occupied
Financing Receivable, Past Due [Line Items]
Total Past Due	3,870
Financial Asset, 30 to 89 Days Past Due [Member] | Construction and land development
Financing Receivable, Past Due [Line Items]
Total Past Due	95
Financial Asset, 30 to 89 Days Past Due [Member] | Residential real estate
Financing Receivable, Past Due [Line Items]
Total Past Due	5,124
Financial Asset, 30 to 89 Days Past Due [Member] | Consumer and other
Financing Receivable, Past Due [Line Items]
Total Past Due	459
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due	15,668
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Past Due	9,491
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | CRE - investor owned
Financing Receivable, Past Due [Line Items]
Total Past Due	3,438
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | CRE - owner occupied
Financing Receivable, Past Due [Line Items]
Total Past Due	1,182
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	1,482
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer and other
Financing Receivable, Past Due [Line Items]
Total Past Due	$ 75

Loans - Summary of Term Loans b

Loans - Summary of Term Loans by Origination Year (Details) $ in Thousands	Mar. 31, 2020USD ($)
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
2020	$ 275,450
2019	662,041
2018	342,408
2017	204,356
2016	81,771
Prior	130,551
Financing Receivable, Converted	3,494
Revolving Loans	753,811
Total	2,453,882
Commercial and industrial | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	274,021
2019	623,511
2018	328,712
2017	188,489
2016	53,064
Prior	126,446
Financing Receivable, Converted	2,557
Revolving Loans	660,675
Total	2,257,475
Commercial and industrial | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	780
2019	17,643
2018	5,258
2017	11,986
2016	23,454
Prior	524
Financing Receivable, Converted	506
Revolving Loans	66,449
Total	126,600
Commercial and industrial | Classified (8 & 9)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	649
2019	20,887
2018	8,438
2017	3,881
2016	5,253
Prior	3,581
Financing Receivable, Converted	431
Revolving Loans	26,687
Total	69,807
Commercial Real Estate-Investor Owned Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	114,482
2019	367,472
2018	239,178
2017	155,251
2016	186,483
Prior	210,328
Financing Receivable, Converted	1,745
Revolving Loans	52,875
Total	1,327,814
Commercial Real Estate-Investor Owned Portfolio Segment [Member] | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	114,369
2019	356,099
2018	229,830
2017	154,406
2016	173,623
Prior	204,948
Financing Receivable, Converted	1,745
Revolving Loans	52,875
Total	1,287,895
Commercial Real Estate-Investor Owned Portfolio Segment [Member] | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	113
2019	10,395
2018	1,305
2017	400
2016	12,614
Prior	1,623
Financing Receivable, Converted	0
Revolving Loans	0
Total	26,450
Commercial Real Estate-Investor Owned Portfolio Segment [Member] | Classified (8 & 9)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	978
2018	8,043
2017	445
2016	246
Prior	3,757
Financing Receivable, Converted	0
Revolving Loans	0
Total	13,469
Commercial Real Estate-Owner Occupied Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	53,157
2019	236,495
2018	105,500
2017	99,654
2016	67,140
Prior	105,629
Financing Receivable, Converted	2,797
Revolving Loans	50,171
Total	720,543
Commercial Real Estate-Owner Occupied Portfolio Segment [Member] | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	50,382
2019	226,562
2018	99,918
2017	89,750
2016	58,499
Prior	96,149
Financing Receivable, Converted	2,797
Revolving Loans	44,271
Total	668,328
Commercial Real Estate-Owner Occupied Portfolio Segment [Member] | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	2,775
2019	8,802
2018	370
2017	9,904
2016	8,641
Prior	5,313
Financing Receivable, Converted	0
Revolving Loans	5,900
Total	41,705
Commercial Real Estate-Owner Occupied Portfolio Segment [Member] | Classified (8 & 9)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	1,131
2018	5,212
2017	0
2016	0
Prior	4,167
Financing Receivable, Converted	0
Revolving Loans	0
Total	10,510
Construction Real Estate Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	24,001
2019	196,235
2018	125,193
2017	63,103
2016	28,407
Prior	15,278
Financing Receivable, Converted	0
Revolving Loans	17,410
Total	469,627
Construction Real Estate Portfolio Segment [Member] | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	23,035
2019	184,561
2018	123,931
2017	63,034
2016	28,407
Prior	14,672
Financing Receivable, Converted	0
Revolving Loans	17,410
Total	455,050
Construction Real Estate Portfolio Segment [Member] | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	966
2019	11,448
2018	1,262
2017	69
2016	0
Prior	563
Financing Receivable, Converted	0
Revolving Loans	0
Total	14,308
Construction Real Estate Portfolio Segment [Member] | Classified (8 & 9)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	226
2018	0
2017	0
2016	0
Prior	43
Financing Receivable, Converted	0
Revolving Loans	0
Total	269
Residential Portfolio Segment
Financing Receivable, Credit Quality Indicator [Line Items]
2020	12,357
2019	40,571
2018	25,023
2017	24,319
2016	38,217
Prior	138,280
Financing Receivable, Converted	245
Revolving Loans	66,802
Total	345,814
Residential Portfolio Segment | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	12,356
2019	37,811
2018	23,381
2017	24,306
2016	38,082
Prior	132,715
Financing Receivable, Converted	245
Revolving Loans	65,660
Total	334,556
Residential Portfolio Segment | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1
2019	1,045
2018	875
2017	0
2016	4
Prior	2,683
Financing Receivable, Converted	0
Revolving Loans	1,093
Total	5,701
Residential Portfolio Segment | Classified (8 & 9)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	1,715
2018	767
2017	13
2016	131
Prior	2,882
Financing Receivable, Converted	0
Revolving Loans	49
Total	5,557
Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,257
2019	26,482
2018	20,915
2017	1,741
2016	5,535
Prior	35,965
Financing Receivable, Converted	10
Revolving Loans	29,336
Total	121,241
Consumer and other | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,257
2019	26,478
2018	20,911
2017	1,735
2016	5,535
Prior	35,940
Financing Receivable, Converted	0
Revolving Loans	29,311
Total	121,167
Consumer and other | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	2
2018	0
2017	0
2016	0
Prior	1
Financing Receivable, Converted	0
Revolving Loans	1
Total	4
Consumer and other | Classified (8 & 9)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	2
2018	4
2017	6
2016	0
Prior	24
Financing Receivable, Converted	10
Revolving Loans	24
Total	$ 70

Loans - Summary of Performing a

Loans - Summary of Performing and Non Performing Loans (Details) $ in Thousands	Mar. 31, 2020USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	$ 18,596
Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	18,469
Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	127
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	15,131
Commercial and industrial | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	15,060
Commercial and industrial | Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	71
Residential Portfolio Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	944
Residential Portfolio Segment | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	944
Residential Portfolio Segment | Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	0
Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	2,521
Consumer and other | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	2,465
Consumer and other | Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	$ 56

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	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	$ 37,204	$ 26,425
Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	18,687
Residential Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	4,141
Blanket Lien
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	5,910
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	26,531	22,578
Commercial and industrial | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	13,051
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	5,910
CRE - investor owned
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	4,115	2,303
CRE - investor owned | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	4,115
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	2,110	213
CRE - owner occupied | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	1,521
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	214
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	214
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	4,154	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	3,927
Residential real estate | Blanket Lien
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	0
Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	$ 80	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) | Consumer and 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) | Consumer and 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) | Consumer and 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 | Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		$ 132,150

Commitments (Details)

Commitments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Unadvanced Commitment on Impaired Loan
Schedule of Commitments [Line Items]
Estimated losses attributable to unadvanced commitments on impaired loans	$ 3,700	$ 400
Commitments to extend credit
Schedule of Commitments [Line Items]
Off-balance sheet financial instruments, contractual amounts	1,411,151	1,469,413
Commitments to extend credit | Fixed Rate Loan Commitment
Schedule of Commitments [Line Items]
Off-balance sheet financial instruments, contractual amounts	138,100	144,800
Letters of credit
Schedule of Commitments [Line Items]
Off-balance sheet financial instruments, contractual amounts	$ 50,981	$ 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	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2021	Dec. 31, 2019
Securities Sold under Agreements to Repurchase [Abstract]
Gross Amounts Recognized	$ 173,061		$ 230,886
Gross Amounts Offset in the Statement of Financial Position	0		0
Net Amounts of Liabilities presented in the Statement of Financial Position	173,061		230,886
Financial Instruments	0		0
Fair Value Collateral Posted	173,061		230,886
Net Amount	0		0
Fair value of derivatives in a net liability position	43,300
Posted collateral	43,300
Interest rate swap
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Asset derivatives (other assets), fair value	33,697		11,055
Liability derivatives (other liabilities), fair value	43,319		14,747
Derivative Asset [Abstract]
Gross Amounts Offset in the Statement of Financial Position	0		0
Derivative financial instruments	33,697		11,055
Financial Instruments	13		56
Fair Value Collateral Posted	0		0
Net Amount	33,683		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	43,319		14,747
Financial Instruments	13		56
Fair Value Collateral Posted	42,746		14,573
Net Amount	560		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	9,587		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	9,587		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	33,697		11,055
Liability derivatives (other liabilities), fair value	33,732		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	842,899		749,819
Asset derivatives (other assets), fair value	33,697		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	$ 33,732		$ 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		$ 2,200

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Assets
Securities available for sale	$ 1,161,514	$ 1,135,317
Estimate of Fair Value Measurement [Member]
Assets
State tax credits held for sale	44,539	39,046
Obligations of U.S. Government-sponsored enterprises
Assets
Securities available for sale	10,230	10,046
Obligations of states and political subdivisions
Assets
Securities available for sale	254,031	213,024
Agency mortgage-backed securities
Assets
Securities available for sale	886,667	902,021
US Treasury Bill Securities [Member]
Assets
Securities available for sale	10,586	10,226
Recurring basis | Estimate of Fair Value Measurement [Member]
Assets
Securities available for sale	1,161,514	1,135,317
Derivatives	33,697	11,055
Total assets	1,195,211	1,146,372
Liabilities
Derivatives	43,319	14,747
Total liabilities	43,319	14,747
Recurring basis | Obligations of U.S. Government-sponsored enterprises | Estimate of Fair Value Measurement [Member]
Assets
Securities available for sale	10,230	10,046
Recurring basis | Obligations of states and political subdivisions | Estimate of Fair Value Measurement [Member]
Assets
Securities available for sale	254,031	213,024
Recurring basis | Agency mortgage-backed securities | Estimate of Fair Value Measurement [Member]
Assets
Securities available for sale	886,667	902,021
Recurring basis | US Treasury Bill Securities [Member] | Estimate of Fair Value Measurement [Member]
Assets
Securities available for sale	10,586	10,226
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 | Significant Other Observable Inputs (Level 2)
Assets
Securities available for sale	1,161,514	1,135,317
Derivatives	33,697	11,055
Total assets	1,195,211	1,146,372
Liabilities
Derivatives	43,319	14,747
Total liabilities	43,319	14,747
Recurring basis | Significant Other Observable Inputs (Level 2) | Obligations of U.S. Government-sponsored enterprises
Assets
Securities available for sale	10,230	10,046
Recurring basis | Significant Other Observable Inputs (Level 2) | Obligations of states and political subdivisions
Assets
Securities available for sale	254,031	213,024
Recurring basis | Significant Other Observable Inputs (Level 2) | Agency mortgage-backed securities
Assets
Securities available for sale	886,667	902,021
Recurring basis | Significant Other Observable Inputs (Level 2) | US Treasury Bill Securities [Member]
Assets
Securities available for sale	10,586	10,226
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 - 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	Mar. 31, 2020USD ($)
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
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
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
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	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
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
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	4,190
Significant Unobservable Inputs (Level 3) | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	288
Significant Unobservable Inputs (Level 3) | Other real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate	3,902
Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	4,190
Estimate of Fair Value Measurement [Member] | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	288
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	$ 3,902

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	Mar. 31, 2020	Dec. 31, 2019
Balance sheet assets
Securities available for sale	$ 1,161,514	$ 1,135,317
Securities held-to-maturity	179,235	181,166
Carrying Amount
Balance sheet assets
Securities held-to-maturity	178,932	181,166
Other investments	41,703	38,044
Loans held for sale	8,430	5,570
Loans, net	5,365,330	5,271,049
State tax credits held for sale	39,521	36,802
Balance sheet liabilities
Certificates of deposit	765,904	826,447
Subordinated debentures and notes	141,336	141,258
FHLB advances	222,000	222,406
Other borrowings	205,918	265,172
Estimated fair value
Balance sheet assets
Securities held-to-maturity	178,081	181,939
Other investments	41,703	38,044
Loans held for sale	8,430	5,570
Loans, net	5,255,133	5,205,651
State tax credits held for sale	44,539	39,046
Balance sheet liabilities
Certificates of deposit	772,208	825,203
Subordinated debentures and notes	127,064	130,985
FHLB advances	223,074	221,402
Other borrowings	$ 205,894	$ 265,172

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
	Mar. 31, 2020	Mar. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 867,185	$ 603,804
Ending balance	846,436	797,835
Net Unrealized Gain (Loss) on Available-for-Sale Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	14,977	(9,047)
Net change	10,561	11,722
Ending balance	25,538	2,675
Unamortized Gain (Loss) on Held-to-Maturity Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	4,934	(235)
Net change	(156)	2
Ending balance	4,778	(233)
Net Unrealized Loss on Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(2,162)	0
Net change	(5,057)	(952)
Ending balance	(7,219)	(952)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	17,749	(9,282)
Net change	5,348	10,772
Ending balance	$ 23,097	$ 1,490

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
	Mar. 31, 2020	Mar. 31, 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	$ 14,029	$ 15,275
Change in unrealized gain on available-for-sale debt securities, tax	3,465	3,773
Change in unrealized gain on available-for-sale debt securities, after tax	10,564	11,502
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	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	(207)	3
Reclassification of (gain) loss on held-to-maturity securities, tax	(51)	1
Reclassification of (gain) loss on held-to-maturity securities, after tax	(156)	2
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	(6,879)	(1,264)
Change in unrealized loss on cash flow hedges arising during the period, tax	(1,699)	(312)
Change in unrealized loss on cash flow hedges arising during the period, after tax	(5,180)	(952)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract]
Reclassification of loss on cash flow hedges, before tax	163	0
Reclassification of loss on cash flow hedges, tax	(40)	0
Reclassification of loss on cash flow hedges, after tax	(123)	0
OCI, Net of Tax [Abstract]
Total other comprehensive income, before tax	7,102	14,306
Total other comprehensive income, tax	1,754	3,534
Total other comprehensive income, after-tax	$ 5,348	$ 10,772