CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
INTEREST INCOME
Loans	$ 717,615	$ 673,720	$ 622,033
Investment securities and other interest-earning assets	170,370	94,858	74,706
Total interest income	887,985	768,578	696,739
INTEREST EXPENSE
Deposits	217,447	40,093	11,817
FHLB advances and other borrowings	27,255	13,131	99
Subordinated debentures	18,244	18,242	22,449
Total interest expense	262,946	71,466	34,365
Net interest income before provision for credit losses	625,039	697,112	662,374
Provision for credit losses	10,129	4,832	(70,876)
Net interest income after provision for credit losses	614,910	692,280	733,250
NONINTEREST INCOME
Loan servicing income	1,958	1,664	2,121
Earnings on bank owned life insurance	14,118	13,159	11,299
Net gain from sales of loans	415	3,238	4,428
Net (loss) gain from sales of investment securities	(253,927)	1,710	16,906
Other income	5,077	5,369	13,360
Total noninterest (loss) income	(173,918)	88,748	107,850
NONINTEREST EXPENSE
Compensation and benefits	213,692	225,245	215,690
Premises and occupancy	45,922	47,433	48,234
Data processing	29,679	26,649	23,770
Other real estate owned operations, net	215	0	0
FDIC insurance premiums	11,373	5,772	5,274
Legal and professional services	19,123	17,947	18,554
Marketing expense	7,080	7,632	6,917
Office expense	4,958	5,103	5,957
Loan expense	2,126	3,810	4,469
Deposit expense	39,593	19,448	15,654
Merger-related expense	0	0	5
Amortization of intangible assets	12,303	13,983	15,936
Other expense	20,887	23,648	19,817
Total noninterest expense	406,951	396,670	380,277
Net income before income taxes	34,041	384,358	460,823
Income tax expense	3,189	100,615	120,934
Net income	$ 30,852	$ 283,743	$ 339,889
EARNINGS PER SHARE
Basic (in dollars per share)	$ 0.31	$ 2.99	$ 3.60
Diluted (in dollars per share)	$ 0.31	$ 2.98	$ 3.58
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	94,113,132	93,718,293	93,532,109
Diluted (in shares)	94,236,875	94,091,461	94,012,137
Service charges on deposit accounts
NONINTEREST INCOME
Noninterest income	$ 10,620	$ 10,698	$ 9,219
Other service fee income
NONINTEREST INCOME
Noninterest income	1,213	1,351	1,566
Debit card interchange fee income
NONINTEREST INCOME
Noninterest income	3,485	3,628	3,489
Trust custodial account fees
NONINTEREST INCOME
Noninterest income	39,129	41,606	38,176
Escrow and exchange fees
NONINTEREST INCOME
Noninterest income	$ 3,994	$ 6,325	$ 7,286