Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax expense at federal statutory rate	$ 167,575	$ 112,111	$ 58,795
SALT expense, net of federal	32,259	19,924	7,884
Tax-exempt interest income, net	(35,371)	(6,814)	(7,181)
Increase in cash surrender value of life insurance	(6,122)	(3,030)	(3,058)
Non-deductible FDIC Deposit insurance premiums	5,581	2,064	2,172
Low income housing tax credits and other benefits, net	(7,627)	(615)	(289)
Non-deductible compensation expense	7,948	786	454
Non-deductible merger-related expenses, excluding compensation	2,717	3,451	0
SALT DTA valuation allowance adjustment, net	(9,874)	0	0
Other, net	(3,392)	(2,880)	576
Income tax expense and effective tax rate	$ 153,694	$ 124,997	$ 59,353
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Income tax expense at federal statutory rate	21.00%	21.00%	21.00%
SALT expense, net of federal	4.10%	3.70%	2.80%
Tax-exempt interest income, net	(4.40%)	(1.30%)	(2.60%)
Increase in cash surrender value of life insurance	(0.80%)	(0.60%)	(1.10%)
Non-deductible FDIC Deposit insurance premiums	0.70%	0.40%	0.80%
Low income housing tax credits and other benefits, net	(1.00%)	(0.10%)	(0.10%)
Non-deductible compensation expense	1.00%	0.10%	0.20%
Non-deductible merger-related expenses, excluding compensation	0.30%	0.70%	0.00%
SALT DTA valuation allowance adjustment, net	(1.20%)	0.00%	0.00%
Other, net	(0.40%)	(0.50%)	0.20%
Income tax expense and effective tax rate	19.30%	23.40%	21.20%