Comprehensive (Loss) Income - AOCI Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income - beginning balance	$ 22,193
Total other comprehensive income (loss), net	(8,138)	$ 5,297
Accumulated other comprehensive income - ending balance	14,055
Unrealized gains on debt securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income - beginning balance	24,216	10,510
Total other comprehensive income (loss), net	(8,721)	7,360
Accumulated other comprehensive income - ending balance	15,495	17,870
Unrealized losses on cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income - beginning balance	(2,023)	0
Total other comprehensive income (loss), net	583	(2,063)
Accumulated other comprehensive income - ending balance	(1,440)	(2,063)
Total
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income - beginning balance	22,193	10,510
Total other comprehensive income (loss), net	(8,138)	5,297
Accumulated other comprehensive income - ending balance	$ 14,055	$ 15,807