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	$ 128,181	$ 138,257	$ 73,447
Other comprehensive (loss) income, before tax (benefit) expense:
Unrealized holding (losses) gains on securities arising during the period	(131,838)	(29,892)	19,981
Unrealized holding losses on derivatives arising during the period	(31,573)	(3,356)	(4,467)
Less: reclassification adjustment for gains on securities included in net income	(2)	(16)	(70)
Unrealized gains (losses) for postretirement obligation:
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), after Reclassification Adjustment, before Tax	76	76	(537)
Net gain (loss)	143	275	(155)
Total other comprehensive (loss) income, before income tax (benefit) expense	(163,194)	(32,913)	14,752
Income tax (benefit) expense related to items of other comprehensive (loss) income	(34,270)	(6,912)	3,098
Comprehensive Income	$ (743)	$ 112,256	$ 85,101