Securities Available for Sale - Continuous loss (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Schedule of Securities Available-for-sale [Line Items]
Fair Value, Less than 12 months	$ 159,767	$ 168,722
Unrealized Losses, Less than 12 months	(2,915)	(23,346)
Fair Value, 12 months or longer	297,211	156,091
Unrealized Losses, 12 months or longer	(59,706)	(40,044)
Fair Value	456,978	324,813
Unrealized Losses	(62,621)	(63,390)
U.S. agency residential mortgage-backed securities
Schedule of Securities Available-for-sale [Line Items]
Fair Value, Less than 12 months	22,653	111,843
Unrealized Losses, Less than 12 months	(1,331)	(15,831)
Fair Value, 12 months or longer	191,863	102,584
Unrealized Losses, 12 months or longer	(39,152)	(25,417)
Fair Value	214,516	214,427
Unrealized Losses	(40,483)	(41,248)
Senior asset-backed securities related to Structured Program transactions
Schedule of Securities Available-for-sale [Line Items]
Fair Value, Less than 12 months	94,552
Unrealized Losses, Less than 12 months	(605)
Fair Value, 12 months or longer	0
Unrealized Losses, 12 months or longer	0
Fair Value	94,552
Unrealized Losses	(605)
U.S. agency securities
Schedule of Securities Available-for-sale [Line Items]
Fair Value, Less than 12 months	5,878	50,352
Unrealized Losses, Less than 12 months	(122)	(7,213)
Fair Value, 12 months or longer	73,162	24,042
Unrealized Losses, 12 months or longer	(14,287)	(8,840)
Fair Value	79,040	74,394
Unrealized Losses	(14,409)	(16,053)
Mortgage-backed securities
Schedule of Securities Available-for-sale [Line Items]
Fair Value, Less than 12 months	16,946	2,441
Unrealized Losses, Less than 12 months	(787)	(229)
Fair Value, 12 months or longer	21,197	20,077
Unrealized Losses, 12 months or longer	(4,793)	(4,241)
Fair Value	38,143	22,518
Unrealized Losses	(5,580)	(4,470)
Other asset-backed securities
Schedule of Securities Available-for-sale [Line Items]
Fair Value, Less than 12 months	14,035	4,086
Unrealized Losses, Less than 12 months	(48)	(73)
Fair Value, 12 months or longer	8,479	6,945
Unrealized Losses, 12 months or longer	(717)	(712)
Fair Value	22,514	11,031
Unrealized Losses	(765)	(785)
Other asset-backed securities related to Structured Program transactions
Schedule of Securities Available-for-sale [Line Items]
Fair Value, Less than 12 months	5,703
Unrealized Losses, Less than 12 months	(22)
Fair Value, 12 months or longer	0
Unrealized Losses, 12 months or longer	0
Fair Value	5,703
Unrealized Losses	(22)
Municipal securities
Schedule of Securities Available-for-sale [Line Items]
Fair Value, Less than 12 months	0	0
Unrealized Losses, Less than 12 months	0	0
Fair Value, 12 months or longer	2,510	2,443
Unrealized Losses, 12 months or longer	(757)	(834)
Fair Value	2,510	2,443
Unrealized Losses	$ (757)	$ (834)