Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest revenue:
Loans, including fees	$ 126,936	$ 122,645	$ 352,861	$ 357,575
Investment securities, including tax exempt of $1,895, $1,118, $4,988 and $3,409, respectively	14,558	17,744	47,567	57,638
Deposits in banks and short-term investments	279	226	1,497	1,074
Total interest revenue	141,773	140,615	401,925	416,287
Interest expense:
Deposits	8,998	17,113	35,344	50,185
Short-term borrowings	2	429	3	838
Federal Home Loan Bank advances	27	521	28	2,695
Long-term debt	4,292	3,214	10,186	9,813
Total interest expense	13,319	21,277	45,561	63,531
Net interest revenue	128,454	119,338	356,364	352,756
Provision for credit losses	21,793	3,100	77,527	9,650
Net interest revenue after provision for credit losses	106,661	116,238	278,837	343,106
Noninterest income:
Brokerage and wealth management fees	3,055	1,699	6,019	4,624
Gains from sales of other loans, net	1,175	1,639	3,889	4,412
Securities gains (losses), net	746	0	746	(118)
Other	10,302	7,119	23,074	20,433
Total noninterest income	48,682	29,031	114,734	74,530
Total revenue	155,343	145,269	393,571	417,636
Noninterest expenses:
Salaries and employee benefits	59,067	50,501	162,236	146,161
Communications and equipment	6,960	6,223	19,462	18,233
Occupancy	7,050	5,921	18,709	17,424
Advertising and public relations	1,778	1,374	5,312	4,256
Postage, printing and supplies	1,703	1,618	4,986	4,733
Professional fees	5,083	4,715	14,003	11,930
Lending and loan servicing expense	3,043	2,556	8,525	7,509
Outside services - electronic banking	1,888	1,934	5,516	5,101
FDIC assessments and other regulatory charges	1,346	314	4,388	3,571
Amortization of intangibles	1,099	1,210	3,126	3,845
Merger-related and other charges	3,361	2,541	4,566	6,981
Other	3,603	4,017	10,670	11,077
Total noninterest expenses	95,981	82,924	261,499	240,821
Net income before income taxes	59,362	62,345	132,072	176,815
Income tax expense	11,755	13,983	27,485	40,106
Net income	47,607	48,362	104,587	136,709
Net income available to common shareholders	$ 45,437	$ 48,011	$ 101,994	$ 135,727
Net income per common share:
Basic (in dollars per share)	$ 0.52	$ 0.60	$ 1.25	$ 1.70
Diluted (in dollars per share)	$ 0.52	$ 0.60	$ 1.25	$ 1.70
Weighted average common shares outstanding:
Basic (in shares)	87,129	79,663	81,815	79,714
Diluted (in shares)	87,205	79,667	81,876	79,718
Service charges and fees
Noninterest income:
Service charges and other related fees	$ 8,260	$ 9,916	$ 23,893	$ 27,429
Mortgage loan gains and other related fees
Noninterest income:
Service charges and other related fees	$ 25,144	$ 8,658	$ 57,113	$ 17,750