CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
INTEREST INCOME:
Interest and fees on loans	$ 102,369	$ 112,439
Interest on securities:
Taxable	32,620	30,443
Nontaxable	6,202	4,503
Interest on federal funds sold	0	1
Interest on interest bearing deposits in other financial institutions	71	66
TOTAL INTEREST INCOME	141,262	147,452
INTEREST EXPENSE:
Interest on deposits	2,977	4,395
Interest on short-term borrowings	46	152
Interest on other borrowings (includes $0 and $(591) of interest benefit related to derivatives reclassified from accumulated other comprehensive income (loss) for the three months ended March 31, 2022 and 2021, respectively)	3,560	3,300
TOTAL INTEREST EXPENSE	6,583	7,847
NET INTEREST INCOME	134,679	139,605
Provision (benefit) for credit losses	3,245	(648)
NET INTEREST INCOME AFTER PROVISION (BENEFIT) FOR CREDIT LOSSES	131,434	140,253
NONINTEREST INCOME:
Loan servicing income	286	838
Securities gains (losses), net (includes $1,991 and $(30) of net security gains (losses) reclassified from accumulated other comprehensive income (loss) for the three months ended March 31, 2022 and 2021, respectively)	2,872	(30)
Unrealized gain on equity securities, net	(283)	(110)
Net gains on sale of loans held for sale	3,411	6,420
Valuation adjustment on servicing rights	1,658	917
Income on bank owned life insurance	524	829
Other noninterest income	3,902	1,152
TOTAL NONINTEREST INCOME	34,569	30,317
NONINTEREST EXPENSES:
Salaries and employee benefits	66,174	59,062
Occupancy	7,362	7,918
Furniture and equipment	3,519	3,093
Professional fees	15,156	13,490
Advertising	1,555	1,469
Core deposit and customer relationship intangibles amortization	2,054	2,516
Other real estate and loan collection expenses	195	135
Loss on sales/valuations of assets, net	46	194
Acquisition, integration and restructuring costs	576	2,928
Partnership investment in tax credit projects	77	35
Other noninterest expenses	14,083	11,583
TOTAL NONINTEREST EXPENSES	110,797	102,423
INCOME BEFORE INCOME TAXES	55,206	68,147
Income taxes (includes $503 and $143 of income tax expense reclassified from accumulated other comprehensive income (loss) for the three months ended March 31, 2022 and 2021, respectively)	12,117	15,333
NET INCOME	43,089	52,814
Preferred dividends	(2,013)	(2,013)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 41,076	$ 50,801
EARNINGS PER COMMON SHARE - BASIC (in dollars per share)	$ 0.97	$ 1.20
EARNINGS PER COMMON SHARE - DILUTED (in dollars per share)	0.97	1.20
CASH DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.27	$ 0.22
Service charges and fees
NONINTEREST INCOME:
Revenue from contract with customers	$ 15,251	$ 13,671
Trust fees
NONINTEREST INCOME:
Revenue from contract with customers	6,079	5,777
Brokerage and insurance commissions
NONINTEREST INCOME:
Revenue from contract with customers	$ 869	$ 853