CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss, net of tax [Member]
Balance at beginning of period at Dec. 31, 2022			$ 970,722	$ 1,644,209		$ (506,979)	$ (804,778)
Balance at beginning of period (ASU 2022-02) at Dec. 31, 2022					$ (1,357)
Stock-based compensation			2,075
Common stock repurchases (See Note 13)						(53,217)
Common stock issued stock-based compensation plan			(13,139)			13,139
Restricted stock forfeited			254			(254)
Net income	$ 70,698			70,698
Dividends on common stock ($0.16 per share and $0.14 per share for the quarters ended March 31, 2024 and 2023, respectively)				(25,374)
Other comprehensive (loss) income, net of tax	87,228						87,228
Balance at end of period at Mar. 31, 2023	1,405,593	$ 22,366	959,912	1,688,176		(547,311)	(717,550)
Balance at beginning of period at Dec. 31, 2022			970,722	1,644,209		(506,979)	(804,778)
Balance at beginning of period (ASU 2022-02) at Dec. 31, 2022					(1,357)
Balance at end of period at Dec. 31, 2023	1,497,609		965,707	1,846,112		(697,406)	(639,170)
Balance at end of period (ASU 2022-02) at Dec. 31, 2023					$ 0
Stock-based compensation			2,925
Common stock repurchases (See Note 13)						(52,354)
Common stock issued stock-based compensation plan			(9,336)			9,336
Restricted stock forfeited			23			(23)
Net income	73,458			73,458
Dividends on common stock ($0.16 per share and $0.14 per share for the quarters ended March 31, 2024 and 2023, respectively)				(26,856)
Other comprehensive (loss) income, net of tax	(15,065)						(15,065)
Balance at end of period at Mar. 31, 2024	$ 1,479,717	$ 22,366	$ 959,319	$ 1,892,714		$ (740,447)	$ (654,235)