Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Interest income
Interest and fees on loans	$ 99,022	$ 83,608
Interest Income, Securities, Operating, Taxable	7,957	7,465
Nontaxable interest and dividends on securities	9	13
Interest on loans held for sale	232	31
Interest on federal funds sold and short-term investments	160	426
Total interest and dividend income	107,380	91,543
Interest expense
Interest on deposits	10,892	7,028
Interest on borrowings	2,184	1,990
Total interest expense	13,076	9,018
Net interest income	94,304	82,525
Provision for credit losses	25,000	1,000
Net interest income after provision for credit losses	69,304	81,525
Noninterest income
Deposit account fees	4,970	4,406
Interchange and ATM fees	4,896	4,516
Investment Banking, Advisory, Brokerage, and Underwriting Fees and Commissions	6,829	6,748
Mortgage banking income	861	806
Gain Realized on Life Insurance Policies	(357)	0
Increase in cash surrender value of life insurance policies	1,276	972
Loan level derivative income	3,597	641
Other noninterest income	3,649	3,444
Total noninterest income	26,435	21,533
Noninterest expenses
Salaries and employee benefits	37,349	33,117
Occupancy and equipment expenses	9,317	7,130
Data processing & facilities management	1,658	1,326
FDIC assessment	0	616
Advertising expense	1,105	1,213
Professional Fees	1,336	764
Amortization of Intangible Assets	1,531	857
Business Combination, Acquisition Related Costs	0	1,032
Software Maintenance	1,685	1,165
Debt and Equity Securities, Unrealized Gain (Loss)	1,799	0
Other noninterest expenses	11,060	9,091
Total noninterest expenses	66,840	56,311
Income before income taxes	28,899	46,747
Current Federal, State and Local, Tax Expense (Benefit)	2,148	11,522
Net income	$ 26,751	$ 35,225
Basic earnings per share (in dollars per share)	$ 0.78	$ 1.25
Diluted earnings per share (in dollars per share)	$ 0.78	$ 1.25
Weighted average common shares (basic) (in shares)	34,184,431	28,106,184
Common shares equivalents (in shares)	36,827	54,466
Weighted average common shares (diluted) (in shares)	34,221,258	28,160,650
Retained Earnings [Member]
Noninterest expenses
Net income	$ 26,751	$ 35,225
Cash dividends declared per common share (in dollars per share)	$ 0.46	$ 0.44