Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 195,457	$ 144,678	$ 166,068
Securities available for sale:
Unrealized holding gains (losses) on securities	1,074	15,128	(214,351)
Reclassification adjustment for losses realized in net income	0	31,063	0
Amortization of unrealized holding losses on securities transferred to the held to maturity category	9,476	10,091	3,701
Total securities available for sale	10,550	56,282	(210,650)
Derivative instruments:
Unrealized holding gains (losses) on derivative instruments	378	(1,905)	14,993
Total derivative instruments	378	(1,905)	14,993
Defined benefit pension and post-retirement benefit plans:
Net gain (loss) arising during the period	405	60	(3,062)
Amortization of net actuarial loss recognized in net periodic pension cost	315	344	125
Total defined benefit pension and post-retirement benefit plans	720	404	(2,937)
Other comprehensive income (loss), net of tax	11,648	54,781	(198,594)
Comprehensive income (loss)	$ 207,105	$ 199,459	$ (32,526)