Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 175,648	$ 167,921	$ 96,951
Unrealized gains and losses on available for sale debt securities:
Net unrealized (losses) gains arising during the period	(186,361)	(23,730)	14,944
Reclassification adjustment for gains included in net income	(42)	(171)	0
Total	(186,403)	(23,901)	14,944
Unrealized gains (losses) on derivatives designated as cash flow hedges	15,904	9,047	(5,269)
Amortization related to post-retirement obligations	(1,409)	4,062	4,159
Total other comprehensive (loss) income, net of tax	(171,908)	(10,792)	13,834
Total comprehensive income	$ 3,740	$ 157,129	$ 110,785