Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Interest income
Interest and fees on loans	$ 92,383	$ 99,022
Interest Income, Securities, Operating, Taxable	6,627	7,957
Nontaxable interest and dividends on securities	5	9
Interest on loans held for sale	296	232
Interest on federal funds sold and short-term investments	326	160
Total interest and dividend income	99,637	107,380
Interest expense
Interest on deposits	2,711	10,892
Interest on borrowings	1,342	2,184
Total interest expense	4,053	13,076
Net interest income	95,584	94,304
Provision for credit losses	(2,500)	25,000
Net interest income after provision for credit losses	98,084	69,304
Noninterest income
Deposit account fees	3,584	4,970
Interchange and ATM fees	2,720	4,896
Investment Banking, Advisory, Brokerage, and Underwriting Fees and Commissions	8,304	6,829
Mortgage banking income	5,740	861
Bank Owned Life Insurance Income	1,323	1,276
Gain Realized on Life Insurance Policies	(258)	(357)
Loan level derivative income	173	3,597
Other noninterest income	3,144	3,649
Total noninterest income	25,246	26,435
Noninterest expenses
Salaries and employee benefits	39,889	37,349
Occupancy and equipment expenses	9,273	9,317
Data processing & facilities management	1,665	1,658
FDIC assessment	1,050
Professional Fees	2,391	1,336
Amortization of Intangible Assets	1,392	1,531
Software Maintenance	1,970	1,685
Available-for-sale Equity Securities, Gross Unrealized Loss	0	1,799
Other noninterest expenses	12,052	12,165
Total noninterest expenses	69,682	66,840
Income before income taxes	53,648	28,899
Current Federal, State and Local, Tax Expense (Benefit)	11,937	2,148
Net income	$ 41,711	$ 26,751
Basic earnings per share (in dollars per share)	$ 1.26	$ 0.78
Diluted earnings per share (in dollars per share)	$ 1.26	$ 0.78
Weighted average common shares (basic) (in shares)	32,995,332	34,184,431
Common shares equivalents (in shares)	30,098	36,827
Weighted average common shares (diluted) (in shares)	33,025,430	34,221,258
Retained Earnings [Member]
Noninterest expenses
Net income	$ 41,711	$ 26,751
Cash dividends declared per common share (in dollars per share)	$ 0.48	$ 0.46