Comprehensive Income (Loss) - Reconciliation of Changes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net change in fair value, after reclassifications, pre tax	$ (58,036)	$ (10,397)
Net change in fair value , after reclassification, tax benefit (expense)	13,074	2,259
Net change in fair value, after tax amount	(44,962)	(8,138)
Unrealized gains on debt securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Change in fair value, before reclassifications, pre tax	(56,974)	(11,080)
Change in fair value, before reclassifications, tax benefit (expense)	12,840	2,458
Change in fair value, before reclassifications, after tax amount	(44,134)	(8,622)
Reclassifications, pre tax	1,062	128
Reclassifications, tax benefit (expense)	(234)	(29)
Reclassifications, after tax amount	828	99
Net change in fair value, after reclassifications, pre tax	(58,036)	(11,208)
Net change in fair value , after reclassification, tax benefit (expense)	13,074	2,487
Net change in fair value, after tax amount	(44,962)	(8,721)
Unrealized losses on cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Change in fair value, before reclassifications, pre tax	0	1,047
Change in fair value, before reclassifications, tax benefit (expense)	0	(294)
Change in fair value, before reclassifications, after tax amount	0	753
Reclassifications, pre tax	0	236
Reclassifications, tax benefit (expense)	0	(66)
Reclassifications, after tax amount	0	170
Net change in fair value, after reclassifications, pre tax	0	811
Net change in fair value , after reclassification, tax benefit (expense)	0	(228)
Net change in fair value, after tax amount	$ 0	$ 583