Accumulated Other Comprehensive Income (Loss) - Changes in components of AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of the period	$ 47,589
Net comprehensive (loss) income	(68,735)	$ 46,572	$ 25,898
Balance at the end of the period	(21,146)	47,589
Benefit Plans
Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of the period	(151)	(149)	(6,450)
Other comprehensive (loss) income before reclassifications	75	(119)	20
Amounts reclassified from accumulated other comprehensive (loss) income	133	117	6,281
Net comprehensive (loss) income	208	(2)	6,301
Balance at the end of the period	57	(151)	(149)
Unrealized Gains and (Losses) on Securities Available for Sale
Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of the period	47,740	11,922	(18,394)
Other comprehensive (loss) income before reclassifications	(68,865)	35,857	28,245
Amounts reclassified from accumulated other comprehensive (loss) income	(78)	(39)	2,071
Net comprehensive (loss) income	(68,943)	35,818	30,316
Balance at the end of the period	(21,203)	47,740	11,922
Gains and (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of the period		(10,756)	(37)
Other comprehensive (loss) income before reclassifications		(26,140)	(10,447)
Amounts reclassified from accumulated other comprehensive (loss) income		36,896	(272)
Net comprehensive (loss) income		10,756	(10,719)
Balance at the end of the period			(10,756)
Accumulated Other Comprehensive (Loss) Gain
Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of the period	47,589	1,017	(24,881)
Other comprehensive (loss) income before reclassifications	(68,790)	9,598	17,818
Amounts reclassified from accumulated other comprehensive (loss) income	55	36,974	8,080
Net comprehensive (loss) income	(68,735)	46,572	25,898
Balance at the end of the period	$ (21,146)	$ 47,589	$ 1,017

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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