Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
INTEREST INCOME
Interest and fees on loans and leases	$ 234,674	$ 223,470	$ 449,078	$ 444,611
Interest and dividends on investment securities:
Taxable	17,256	14,619	35,981	27,731
Exempt from federal income tax	1,369	1,487	2,741	3,021
Dividends	84	405	170	1,003
Interest on temporary investments and interest bearing deposits	2,919	774	4,272	1,398
Total interest income	256,302	240,755	492,242	477,764
INTEREST EXPENSE
Interest on deposits	4,015	7,016	7,931	17,694
Interest on securities sold under agreement to repurchase and federal funds purchased	66	68	129	144
Interest on borrowings	50	866	99	2,638
Interest on junior subordinated debentures	4,001	3,042	7,150	6,094
Total interest expense	8,132	10,992	15,309	26,570
Net interest income	248,170	229,763	476,933	451,194
PROVISION (RECAPTURE) FOR CREDIT LOSSES	18,692	(22,996)	23,496	(22,996)
Net interest income after provision (recapture) for credit losses	229,478	252,759	453,437	474,190
NON-INTEREST INCOME
Residential mortgage banking revenue, net	30,544	44,443	91,330	109,476
Gain on sale of debt securities, net	0	0	2	4
(Loss) gain on equity securities, net	(2,075)	4	(4,736)	(702)
Gain on loan and lease sales, net	1,303	5,318	3,640	6,691
Bank owned life insurance income	2,110	2,092	4,197	4,163
Noninterest Income, Other Operating Income	785	17,499	(2,099)	37,588
Total non-interest income	55,235	91,075	135,204	199,875
NON-INTEREST EXPENSE
Salaries and employee benefits	110,942	121,573	224,080	245,707
Occupancy and equipment, net	34,559	34,657	69,388	69,292
Communications	2,585	3,004	5,339	5,767
Marketing	1,649	2,054	4,047	3,426
Services	14,402	13,512	25,739	24,262
FDIC assessments	2,954	1,607	7,470	4,206
Intangible amortization	1,026	1,130	2,051	2,260
Merger related expenses	2,672	0	4,950	0
Other expenses	8,785	11,863	18,940	22,072
Total non-interest expense	179,574	189,400	362,004	376,992
Income before provision for income taxes	105,139	154,434	226,637	297,073
Provision for income taxes	26,548	38,291	56,889	73,193
Net income	$ 78,591	$ 116,143	$ 169,748	$ 223,880
Earnings per common share:
Basic (in dollars per share)	$ 0.36	$ 0.53	$ 0.78	$ 1.02
Diluted (in dollars per share)	$ 0.36	$ 0.53	$ 0.78	$ 1.01
Weighted average number of common shares outstanding:
Basic (in shares)	217,030	220,593	216,906	220,481
Diluted (in shares)	217,279	221,022	217,333	220,928
Service charges on deposits
NON-INTEREST INCOME
Revenue from contract with customer	$ 12,011	$ 10,310	$ 23,594	$ 19,957
Card-based Fees
NON-INTEREST INCOME
Revenue from contract with customer	10,530	10,274	19,238	17,648
Brokerage revenue
NON-INTEREST INCOME
Revenue from contract with customer	$ 27	$ 1,135	$ 38	$ 5,050