Commitments and Contingencies - Guarantees Outstanding (Details) - Loans Sold or Securitized With Recourse - Loans Sold or Securitized with Recourse - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Guarantor obligation, maximum potential future payment [Abstract]
Expire in One Year or Less	$ 25
Expire After One Year Through Three Years	126
Expire After Three Years Through Five Years	31
Expire After Five Years	21,748
Total	21,930	$ 22,922
Carrying Value	28,558	31,095
Single Family Residential
Guarantor obligation, maximum potential future payment [Abstract]
Expire in One Year or Less	25
Expire After One Year Through Three Years	126
Expire After Three Years Through Five Years	31
Expire After Five Years	6,752
Total	6,934	7,926
Carrying Value	6,934	7,926
Multifamily residential
Guarantor obligation, maximum potential future payment [Abstract]
Expire in One Year or Less	0
Expire After One Year Through Three Years	0
Expire After Three Years Through Five Years	0
Expire After Five Years	14,996
Total	14,996	14,996
Carrying Value	$ 21,624	$ 23,169