CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
INTEREST INCOME:
Interest and fees on loans	$ 122,913	$ 112,062	$ 334,000	$ 336,416
Interest on securities:
Taxable	45,648	32,384	116,366	94,373
Nontaxable	6,164	4,609	17,874	13,673
Interest on federal funds sold	0	0	0	1
Interest on interest bearing deposits in other financial institutions	1,081	132	1,715	258
TOTAL INTEREST INCOME	175,806	149,187	469,955	444,721
INTEREST EXPENSE:
Interest on deposits	15,158	3,444	24,665	11,629
Interest on short-term borrowings	360	98	494	348
Interest on other borrowings (includes $189 and $(543) of interest expense (benefit) related to derivatives reclassified from accumulated other comprehensive income (loss) for the three months ended September 30, 2022 and 2021, respectively, and $552 and $(1,601) of interest expense (benefit) related to derivatives reclassified from accumulated other comprehensive income (loss) for the nine months ended September 30, 2022 and 2021, respectively)	4,412	3,102	11,780	9,378
TOTAL INTEREST EXPENSE	19,930	6,644	36,939	21,355
NET INTEREST INCOME	155,876	142,543	433,016	423,366
Provision (benefit) for credit losses	5,492	(4,534)	11,983	(12,262)
NET INTEREST INCOME AFTER PROVISION (BENEFIT) FOR CREDIT LOSSES	150,384	147,077	421,033	435,628
NONINTEREST INCOME:
Loan servicing income	831	784	1,951	2,495
Securities gains (losses), net (includes $(1,070) and $1,535 of net security gains (losses) reclassified from accumulated other comprehensive income (loss) for the three months ended September 30, 2022 and 2021, respectively, and $(1,720) and $4,347 of net security gains (losses) reclassified from accumulated other comprehensive income (loss) for the nine months ended September 30, 2022 and 2021, respectively)	(1,055)	1,535	(272)	4,347
Unrealized gain (loss) on equity securities, net	(211)	112	(615)	85
Net gains on sale of loans held for sale	1,832	5,281	8,144	16,454
Valuation adjustment on servicing rights	0	195	1,658	586
Income on bank owned life insurance	694	940	1,741	2,706
Other noninterest income	3,787	1,239	15,596	4,557
TOTAL NONINTEREST INCOME	29,181	32,724	98,289	96,205
NONINTEREST EXPENSES:
Salaries and employee benefits	62,661	60,689	192,867	177,083
Occupancy	6,794	7,366	21,250	22,683
Furniture and equipment	2,928	3,365	9,480	9,959
Professional fees	16,277	17,242	47,420	46,969
Advertising	1,554	1,921	4,392	5,039
Core deposit and customer relationship intangibles amortization	1,856	2,295	5,993	7,226
Other real estate and loan collection expenses	304	78	577	627
(Gain)/loss on sales/valuations of assets, net	(251)	(3)	(3,435)	374
Acquisition, integration and restructuring costs	2,156	204	5,144	3,342
Partnership investment in tax credit projects	979	2,374	1,793	3,754
Other noninterest expenses	13,625	15,096	40,678	39,370
TOTAL NONINTEREST EXPENSES	108,883	110,627	326,159	316,426
INCOME BEFORE INCOME TAXES	70,682	69,174	193,163	215,407
Income taxes (includes $302 and $524 of income tax benefit reclassified from accumulated other comprehensive income (loss) for the three months ended September 30, 2022 and 2021, respectively, and $466 and $1,501 of income tax benefit reclassified from accumulated other comprehensive income (loss) for the nine months ended September 30, 2022 and 2021, respectively)	14,118	13,250	41,637	45,064
NET INCOME	56,564	55,924	151,526	170,343
Preferred dividends	(2,013)	(2,013)	(6,038)	(6,038)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 54,551	$ 53,911	$ 145,488	$ 164,305
EARNINGS PER COMMON SHARE - BASIC (in dollars per share)	$ 1.28	$ 1.27	$ 3.43	$ 3.89
EARNINGS PER COMMON SHARE - DILUTED (in dollars per share)	1.28	1.27	3.42	3.88
CASH DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.27	$ 0.25	$ 0.81	$ 0.69
Reclassification out of accumulated other comprehensive income (loss) | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
INTEREST EXPENSE:
Interest on other borrowings (includes $189 and $(543) of interest expense (benefit) related to derivatives reclassified from accumulated other comprehensive income (loss) for the three months ended September 30, 2022 and 2021, respectively, and $552 and $(1,601) of interest expense (benefit) related to derivatives reclassified from accumulated other comprehensive income (loss) for the nine months ended September 30, 2022 and 2021, respectively)	$ 189	$ (543)	$ 552	$ (1,601)
Reclassification out of accumulated other comprehensive income (loss) | Accumulated Net Unrealized Investment Gain (Loss)
NONINTEREST INCOME:
Securities gains (losses), net (includes $(1,070) and $1,535 of net security gains (losses) reclassified from accumulated other comprehensive income (loss) for the three months ended September 30, 2022 and 2021, respectively, and $(1,720) and $4,347 of net security gains (losses) reclassified from accumulated other comprehensive income (loss) for the nine months ended September 30, 2022 and 2021, respectively)	(1,070)	1,535	(1,720)	4,347
Reclassification out of accumulated other comprehensive income (loss) | Accumulated Other Comprehensive Income (Loss)
NONINTEREST EXPENSES:
Income taxes (includes $302 and $524 of income tax benefit reclassified from accumulated other comprehensive income (loss) for the three months ended September 30, 2022 and 2021, respectively, and $466 and $1,501 of income tax benefit reclassified from accumulated other comprehensive income (loss) for the nine months ended September 30, 2022 and 2021, respectively)	302	524	466	1,501
Service charges and fees
NONINTEREST INCOME:
Revenue from contract with customers	17,282	15,551	50,599	44,354
Trust fees
NONINTEREST INCOME:
Revenue from contract with customers	5,372	6,221	17,130	18,037
Brokerage and insurance commissions
NONINTEREST INCOME:
Revenue from contract with customers	$ 649	$ 866	$ 2,357	$ 2,584