Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Interest income:
Loans, including fees	$ 99,230	$ 102,805
Investment securities:
Taxable	16,488	19,300
Tax-exempt	766	1,649
Other interest income	128	309
Total interest income	116,612	124,063
Interest expense:
Savings deposits	3,235	4,243
Time deposits	5,970	4,378
Securities sold under repurchase agreements	465	589
Other borrowings	2,826	3,494
Junior subordinated deferrable interest debentures	1,273	1,950
Total interest expense	13,769	14,654
Net interest income	102,843	109,409
Provision for credit loss expenses	16,836	7,420
Net interest income after provision for credit losses	86,007	101,989
Non-interest income:
Investment securities transactions, net	(5)	(4)
Other investments, net	(231)	3,948
Other income	4,809	2,540
Total non-interest income	35,130	36,129
Non-interest expense:
Employee compensation and benefits	36,330	36,409
Occupancy	6,899	6,377
Depreciation of bank premises and equipment	7,109	6,981
Professional fees	3,970	3,592
Deposit insurance assessments		783
Net expense, other real estate owned	3,002	995
Advertising	1,984	2,082
Software and software maintenance	4,491	4,497
Other	13,197	11,235
Total non-interest expense	76,982	72,951
Income before income taxes	44,155	65,167
Provision for income taxes	9,317	13,261
Net income	$ 34,838	$ 51,906
Basic earnings per common share:
Weighted average number of shares outstanding (in shares)	65,070,589	65,617,977
Net income (in dollars per share)	$ 0.54	$ 0.79
Fully diluted earnings per common share:
Weighted average number of shares outstanding (in shares)	65,228,824	65,831,162
Net income (in dollars per share)	$ 0.53	$ 0.79
Services charges on deposit accounts
Non-interest income:
Service charges	$ 17,637	$ 17,260
Other service charges, commissions and fees, Banking
Non-interest income:
Service charges	11,166	10,876
Other service charges, commissions and fees, Non-banking
Non-interest income:
Service charges	$ 1,754	$ 1,509