Commitments and Contingencies - Guarantees Outstanding (Details) - Loans Sold or Securitized With Recourse - Loans Sold or Securitized with Recourse - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Guarantor obligation, maximum potential future payment [Abstract]
Expire in One Year or Less	$ 37
Expire After One Year Through Three Years	67
Expire After Three Years Through Five Years	0
Expire After Five Years	21,400
Total	21,504	$ 21,777
Carrying Value	27,524	28,101
Single Family Residential
Guarantor obligation, maximum potential future payment [Abstract]
Expire in One Year or Less	37
Expire After One Year Through Three Years	67
Expire After Three Years Through Five Years	0
Expire After Five Years	6,404
Total	6,508	6,781
Carrying Value	6,508	6,781
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	$ 21,016	$ 21,320