CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest income:
Loans	$ 158,450	$ 170,288	$ 158,691
Taxable investment securities	4,172	167	417
Tax-exempt investment securities	33,416	16,856	24,960
MBS	34,319	50,486	41,584
FHLB stock and equity investments	1,233	1,654	1,595
Other interest earning assets	238	1,336	1,918
Total interest income	231,828	240,787	229,165
Interest expense:
Deposits	24,648	44,565	35,864
FHLB borrowings	11,397	17,719	12,813
Subordinated notes	6,301	5,661	5,659
Trust preferred subordinated debentures	1,829	2,775	2,610
Other borrowings	388	262	155
Total interest expense	44,563	70,982	57,101
Net interest income	187,265	169,805	172,064
Provision for credit losses	20,201	5,101	8,437
Net interest income after provision for credit losses	167,064	164,704	163,627
Noninterest income:
Deposit services	24,359	26,038	25,082
Net gain (loss) on sale of securities available for sale	8,257	756	(1,839)
Gain on sale of loans	2,772	509	692
Trust fees	5,133	6,269	6,832
BOLI	2,554	2,307	2,923
Brokerage services	2,271	2,080	1,987
Other	4,386	4,409	5,096
Total noninterest income	49,732	42,368	40,773
Noninterest expense:
Salaries and employee benefits	77,225	73,731	70,643
Net occupancy	14,369	13,128	13,814
Acquisition expense	0	0	2,413
Advertising, travel & entertainment	2,147	2,964	2,894
ATM expense	1,018	894	1,090
Professional fees	4,224	4,717	4,035
Software and data processing	4,957	4,537	3,996
Communications	1,984	1,941	1,847
FDIC insurance	1,124	859	1,871
Amortization of intangibles	3,617	4,418	5,213
Other	12,642	12,108	12,283
Total noninterest expense	123,307	119,297	120,099
Income before income tax expense	93,489	87,775	84,301
Income tax expense	11,336	13,221	10,163
Net income	$ 82,153	$ 74,554	$ 74,138
Earnings per common share - basic (in dollars per share)	$ 2.47	$ 2.21	$ 2.12
Earnings per common share - diluted (in dollars per share)	2.47	2.20	2.11
Cash dividends paid per common share	$ 1.30	$ 1.26	$ 1.20