Consolidated Statements of Income (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Interest income
Loans	$ 113,325,000	$ 115,672,000	$ 228,330,000	$ 236,277,000
Securities
Taxable	5,619,000	6,418,000	10,536,000	13,720,000
Tax-exempt	1,702,000	1,670,000	3,359,000	3,124,000
Other	345,000	195,000	528,000	1,007,000
Total interest income	120,991,000	123,955,000	242,753,000	254,128,000
Interest expense
Deposits	7,669,000	13,871,000	15,949,000	32,366,000
Borrowings	3,743,000	4,302,000	7,577,000	9,378,000
Total interest expense	11,412,000	18,173,000	23,526,000	41,744,000
Net interest income	109,579,000	105,782,000	219,227,000	212,384,000
Provision for loan losses	0	26,900,000	0	53,250,000
Provision for other credit losses	0	0	0	0
Provision for credit losses	0	26,900,000	0	53,250,000
Net interest income after provision for credit losses	109,579,000	78,882,000	219,227,000	159,134,000
Noninterest income
Service charges on deposit accounts	9,458,000	6,832,000	17,481,000	15,902,000
Fees and commissions	4,110,000	2,971,000	8,010,000	6,025,000
Insurance commissions	2,422,000	2,125,000	4,659,000	4,116,000
Wealth management revenue	5,019,000	3,824,000	9,811,000	7,826,000
Mortgage banking income	20,853,000	45,490,000	71,586,000	61,025,000
Net gain on sales of securities	0	31,000	1,357,000	31,000
BOLI income	1,644,000	1,329,000	3,716,000	2,492,000
Other	4,104,000	1,568,000	12,027,000	4,323,000
Total noninterest income	47,610,000	64,170,000	128,647,000	101,740,000
Noninterest expense
Salaries and employee benefits	70,293,000	79,361,000	148,989,000	152,550,000
Data processing	5,652,000	5,047,000	11,103,000	10,053,000
Net occupancy and equipment	11,374,000	13,511,000	23,912,000	27,631,000
Other real estate owned	104,000	620,000	145,000	1,038,000
Professional fees	2,674,000	2,517,000	5,595,000	5,159,000
Advertising and public relations	3,100,000	2,920,000	6,352,000	6,320,000
Intangible amortization	1,539,000	1,834,000	3,137,000	3,729,000
Communications	2,291,000	2,181,000	4,583,000	4,379,000
Restructuring charges	15,000	0	307,000	0
Debt prepayment penalty		90,000	0	90,000
Other	11,735,000	10,204,000	20,589,000	22,377,000
Total noninterest expense	108,777,000	118,285,000	224,712,000	233,326,000
Income (loss) before income taxes	48,412,000	24,767,000	123,162,000	27,548,000
Income taxes	7,545,000	4,637,000	24,387,000	5,410,000
Net income (loss)	$ 40,867,000	$ 20,130,000	$ 98,775,000	$ 22,138,000
Basic earnings per share (usd per share)	$ 0.73	$ 0.36	$ 1.75	$ 0.39
Diluted earnings per share (usd per share)	0.72	0.36	1.75	0.39
Cash dividends per common share (usd per share)	$ 0.22	$ 0.22	$ 0.44	$ 0.44