Income Taxes - Schedule of Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income before provision for income taxes	$ 136,765	$ 193,922	$ 142,241
Federal income tax, at statutory rates	21.00%	21.00%	21.00%
Computed “expected” federal income tax expense	$ 28,721	$ 40,724	$ 29,871
Increase (decrease) in federal income tax expense resulting from
State income taxes, net of federal benefit	5,979	8,927	7,223
Earnings on BOLI	(1,109)	(1,381)	(1,435)
Tax exempt interest	(606)	(786)	(768)
Merger related expenses	0	90	24
Stock compensation	(298)	26	(110)
Reclassification of certain tax effect from accumulated other comprehensive income	(94)	(157)	(173)
Research and development and other credits	(557)	(471)	(475)
Dividends received deduction	(368)	(371)	(510)
Other items, net	1,032	(36)	(1,482)
Total provision for income taxes	$ 32,700	$ 46,565	$ 32,165