Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Interest income
Interest and fees on loans	$ 88,814	$ 91,634	$ 181,197	$ 190,656
Interest Income, Securities, Operating, Taxable	7,184	7,831	13,811	15,788
Nontaxable interest and dividends on securities	5	9	10	18
Interest on loans held for sale	186	359	482	591
Interest on federal funds sold and short-term investments	513	132	839	292
Total interest and dividend income	96,702	99,965	196,339	207,345
Interest expense
Interest on deposits	2,017	7,027	4,728	17,919
Interest on borrowings	1,331	1,840	2,673	4,024
Total interest expense	3,348	8,867	7,401	21,943
Net interest income	93,354	91,098	188,938	185,402
Provision for credit losses	(5,000)	20,000	(7,500)	45,000
Net interest income after provision for credit losses	98,354	71,098	196,438	140,402
Noninterest income
Deposit account fees	3,822	2,829	7,406	7,799
Interchange and ATM fees	3,068	5,214	5,788	10,110
Investment Banking, Advisory, Brokerage, and Underwriting Fees and Commissions	8,872	7,296	17,176	14,125
Mortgage banking income	2,705	5,005	8,445	5,866
Bank Owned Life Insurance Income	1,589	1,312	2,912	2,588
Gain Realized on Life Insurance Policies	0	(335)	(258)	(692)
Loan level derivative income	116	2,864	289	6,461
Debt and Equity Securities, Unrealized Gain (Loss)	436	1,386	723	1,386
Other noninterest income	4,359	1,949	7,216	5,598
Total noninterest income	24,967	28,190	50,213	54,625
Noninterest expenses
Salaries and employee benefits	42,635	37,269	82,524	74,618
Occupancy and equipment expenses	8,706	9,273	17,979	18,590
Data processing & facilities management	1,686	1,459	3,351	3,117
FDIC assessment	775	503	1,825	503
Professional Fees	1,492	1,603	3,883	2,939
Amortization of Intangible Assets	1,293	1,433	2,685	2,964
Business Combination, Acquisition Related Costs	1,731	0	1,731	0
Software Maintenance	1,915	1,780	3,885	3,465
Other noninterest expenses	13,069	13,287	25,121	27,251
Total noninterest expenses	73,302	66,607	142,984	133,447
Income before income taxes	50,019	32,681	103,667	61,580
Current Federal, State and Local, Tax Expense (Benefit)	12,447	7,779	24,384	9,927
Net income	$ 37,572	$ 24,902	$ 79,283	$ 51,653
Basic earnings per share (in dollars per share)	$ 1.14	$ 0.76	$ 2.40	$ 1.54
Diluted earnings per share (in dollars per share)	$ 1.14	$ 0.76	$ 2.40	$ 1.54
Weighted average common shares (basic) (in shares)	33,033,578	32,944,761	33,014,561	33,564,596
Common shares equivalents (in shares)	21,270	28,098	25,085	31,991
Weighted average common shares (diluted) (in shares)	33,054,848	32,972,859	33,039,646	33,596,587
Retained Earnings [Member]
Noninterest expenses
Net income	$ 37,572	$ 24,902	$ 79,283	$ 51,653
Cash dividends declared per common share (in dollars per share)	$ 0.48	$ 0.46	$ 0.96	$ 0.92