Basis of Accounting and Consolidation - Schedule of Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Balance	$ 797,952	$ 793,204	$ 661,865	$ 633,155
Accumulated Other Comprehensive Loss
Net unrealized losses on securities available-for-sale	(203,177)	(192,149)
Tax benefit	55,510	55,722
Balance	$ (147,667)	$ (136,427)	$ (137,901)	$ (151,507)