Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 32,003	$ 39,228	$ 72,539	$ 83,191
Unrealized gains and losses on available for sale debt securities:
Net unrealized (losses) gains arising during the period	(14,726)	(45,733)	6,138	(130,704)
Reclassification adjustment for gains included in net income	0	(42)	0	(42)
Total	(14,726)	(45,775)	6,138	(130,746)
Unrealized gains and losses on derivatives:
Net unrealized gains (losses) arising during the period	3,650	2,276	3,033	12,227
Reclassification adjustment for (gains) losses included in net income	(3,010)	(118)	(6,089)	369
Total	640	2,158	(3,056)	12,596
Amortization related to post-retirement obligations	(261)	(236)	(530)	(512)
Total other comprehensive (loss) income	(14,347)	(43,853)	2,552	(118,662)
Total comprehensive income (loss)	$ 17,656	$ (4,625)	$ 75,091	$ (35,471)