Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Loans including fees:
Taxable		$ 124,737	$ 148,253	$ 253,464	$ 287,225
Nontaxable		3,453	3,986	7,078	8,209
Investment securities:
Taxable		25,398	29,241	52,754	57,278
Nontaxable		8,352	7,249	16,294	14,657
Money market and other interest-earning investments		34	334	383	612
Total interest income		161,974	189,063	329,973	367,981
Interest Expense
Deposits		6,798	18,519	19,096	34,963
Federal funds purchased and interbank borrowings		44	1,817	1,284	3,735
Securities sold under agreements to repurchase		185	671	569	1,333
Federal Home Loan Bank advances		6,844	10,039	14,612	19,970
Other borrowings		2,432	2,787	4,970	5,702
Total interest expense		16,303	33,833	40,531	65,703
Net interest income		145,671	155,230	289,442	302,278
Provision for loan losses	[1]	22,545	1,003	39,495	2,046
Net interest income after provision for loan losses		123,126	154,227	249,947	300,232
Noninterest Income
Wealth management fees		9,424	9,909	18,308	18,444
Service charges on deposit accounts		7,582	11,515	17,659	22,341
Debit card and ATM fees		4,832	5,419	9,830	10,922
Mortgage banking revenue		17,313	7,135	28,432	12,146
Investment product fees		4,845	5,591	10,719	10,862
Capital markets income		6,179	3,150	10,507	5,667
Company-owned life insurance		2,968	2,711	6,048	5,899
Debt securities gains (losses), net		511	1,165	5,685	1,062
Other income		4,807	4,619	8,775	10,287
Total noninterest income		58,461	51,214	115,963	97,630
Noninterest Expense
Salaries and employee benefits		66,556	71,566	145,729	142,749
Occupancy		13,245	14,559	28,378	29,137
Equipment		3,853	4,517	9,158	8,991
Marketing		2,395	4,439	5,492	8,162
Data processing		9,629	10,207	19,096	19,548
Communication		2,296	2,849	5,094	5,903
Professional fees		3,545	4,921	7,838	7,831
FDIC assessment		2,014	1,454	3,623	3,541
Amortization of intangibles		3,612	4,325	7,388	8,797
Amortization of tax credit investments		287	568	5,802	828
Other expense		12,689	8,713	41,267	15,672
Total noninterest expense		120,121	128,118	278,865	251,159
Income before income taxes		61,466	77,323	87,045	146,703
Income tax expense		9,761	14,359	12,700	27,463
Net income		$ 51,705	$ 62,964	$ 74,345	$ 119,240
Net income per common share - basic (in dollars per share)		$ 0.32	$ 0.37	$ 0.45	$ 0.69
Net income per common share - diluted (in dollars per share)		$ 0.32	$ 0.36	$ 0.45	$ 0.68
Weighted average number of common shares outstanding - basic (in shares)		164,732	172,985	166,240	173,855
Weighted average number of common shares outstanding - diluted (in shares)		165,302	173,675	166,848	174,531
Dividends per common share (in dollars per share)		$ 0.14	$ 0.13	$ 0.28	$ 0.26

[1] Beginning January 1, 2020, calculation is based on current expected loss methodology. Prior to January 1, 2020, calculation was based on incurred loss methodology.