Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 38,846	$ 28,643	$ 78,255	$ 74,721
Securities available for sale:
Unrealized holding gains (losses) on securities	468	(15,930)	(4,166)	(399)
Reclassification adjustment for losses realized in net income	0	16,816	0	16,816
Amortization of unrealized holding losses on securities transferred to the held to maturity category	2,421	2,252	4,859	4,580
Total securities available for sale	2,889	3,138	693	20,997
Derivative instruments:
Unrealized holding losses on derivative instruments	(141)	(2,361)	(711)	(3,593)
Total derivative instruments	(141)	(2,361)	(711)	(3,593)
Defined benefit pension and post-retirement benefit plans:
Amortization of net actuarial loss recognized in net periodic pension cost	79	86	158	172
Total defined benefit pension and post-retirement benefit plans	79	86	158	172
Other comprehensive income, net of tax	2,827	863	140	17,576
Comprehensive income	$ 41,673	$ 29,506	$ 78,395	$ 92,297