CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
INTEREST INCOME:
Interest and fees on loans	$ 195,661	$ 153,843
Interest on securities:
Taxable	47,014	55,976
Nontaxable	6,041	6,028
Interest on interest bearing deposits in other financial institutions	3,006	1,131
TOTAL INTEREST INCOME	251,722	216,978
INTEREST EXPENSE:
Interest on deposits	84,134	56,898
Interest on borrowings	7,524	2,422
Interest on term debt (includes $(35) and $591 of interest (income) expense related to derivatives reclassified from accumulated other comprehensive loss for the three months ended March 31, 2024 and 2023, respectively)	5,849	5,446
TOTAL INTEREST EXPENSE	97,507	64,766
NET INTEREST INCOME	154,215	152,212
Provision for credit losses	986	3,074
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES	153,229	149,138
NONINTEREST INCOME:
Loan servicing income	131	714
Securities (losses) gains, net (includes $58 and $(1,104) of net security gains (losses) reclassified from accumulated other comprehensive loss for the three months ended March 31, 2024 and 2023, respectively)	58	(1,104)
Unrealized gain (loss) on equity securities, net	95	193
Net gains on sale of loans held for sale	104	1,831
Income on bank owned life insurance	1,177	964
Other noninterest income	2,347	1,463
TOTAL NONINTEREST INCOME	27,663	29,999
NONINTEREST EXPENSES:
Salaries and employee benefits	63,955	62,149
Occupancy	7,263	7,209
Furniture and equipment	2,337	2,915
Professional fees	15,531	12,797
FDIC insurance assessments	4,969	3,279
Advertising	1,358	1,985
Core deposit intangibles and customer relationship intangibles amortization	1,492	1,788
Other real estate and loan collection expenses	512	155
Loss (gain) on sales/valuations of assets, net	214	1,115
Acquisition, integration and restructuring costs	1,375	1,673
Partnership investment in tax credit projects	494	538
Other noninterest expenses	14,095	15,440
TOTAL NONINTEREST EXPENSES	113,595	111,043
INCOME BEFORE INCOME TAXES	67,297	68,094
Income taxes (includes $5,762 and $426 of income tax benefit reclassified from accumulated other comprehensive loss for the three months ended March 31, 2024 and 2023, respectively)	15,590	15,318
NET INCOME	51,707	52,776
Preferred dividends	(2,013)	(2,013)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 49,694	$ 50,763
EARNINGS PER COMMON SHARE - BASIC (in dollars per share)	$ 1.16	$ 1.19
EARNINGS PER COMMON SHARE - DILUTED (in dollars per share)	1.16	1.19
CASH DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.30	$ 0.30
Service charges and fees
NONINTEREST INCOME:
Revenue from contract with customers	$ 17,063	$ 17,136
Trust fees
NONINTEREST INCOME:
Revenue from contract with customers	5,043	5,657
Brokerage and insurance commissions
NONINTEREST INCOME:
Revenue from contract with customers	754	696
Capital markets fees
NONINTEREST INCOME:
Revenue from contract with customers	$ 891	$ 2,449