Fair Value Disclosures (Details 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Tax-exempt asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Period	$ 165,845	$ 181,566	$ 180,033	$ 199,176
Purchases / Additions	0	0	0	0
Sales / Reductions	(166,890)	(142)	(170,626)	(11,513)
Realized	0	0	0	0
Unrealized	1,045	4,530	(9,407)	(1,709)
Balance at End of Period	0	185,954	0	185,954
Credit risk transfer (“CRT”) securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Period	11,901	11,465	11,846	11,417
Purchases / Additions	0	0	0	0
Sales / Reductions	0	0	0	0
Realized	0	0	0	0
Unrealized	(231)	248	(176)	296
Balance at End of Period	11,670	11,713	11,670	11,713
Loans Held For Sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Period	8,085	7,275	7,658	6,933
Purchases / Additions	0	1,148	1,327	1,685
Sales / Reductions	(4,029)	(246)	(4,600)	(525)
Realized	0	0	0	5
Unrealized	210	50	(119)	129
Balance at End of Period	$ 4,266	$ 8,227	$ 4,266	$ 8,227