Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 72,455	$ 41,833	$ 150,710	$ 116,554
Securities available for sale:
Unrealized holding gains (losses) on securities	23,441	(12,883)	19,275	(13,282)
Reclassification adjustment for losses realized in net income	0	0	0	16,816
Amortization of unrealized holding losses on securities transferred to the held to maturity category	2,331	2,947	7,190	7,527
Total securities available for sale	25,772	(9,936)	26,465	11,061
Derivative instruments:
Unrealized holding (losses) gains on derivative instruments	(828)	1,987	(1,539)	(1,606)
Total derivative instruments	(828)	1,987	(1,539)	(1,606)
Defined benefit pension and post-retirement benefit plans:
Amortization of net actuarial loss recognized in net periodic pension cost	78	86	236	258
Total defined benefit pension and post-retirement benefit plans	78	86	236	258
Other comprehensive income (loss), net of tax	25,022	(7,863)	25,162	9,713
Comprehensive income	$ 97,477	$ 33,970	$ 175,872	$ 126,267