Commitments and Contingencies - Guarantees Outstanding (Details) - Loans Sold or Securitized With Recourse - Loans Sold or Securitized with Recourse - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Guarantor obligation, maximum potential future payment [Abstract]
Expire in One Year or Less	$ 12
Expire After One Year Through Three Years	174
Expire After Three Years Through Five Years	32
Expire After Five Years	21,893
Total	22,111	$ 22,922
Carrying Value	29,204	31,095
Single Family Residential
Guarantor obligation, maximum potential future payment [Abstract]
Expire in One Year or Less	12
Expire After One Year Through Three Years	174
Expire After Three Years Through Five Years	32
Expire After Five Years	6,897
Total	7,115	7,926
Carrying Value	7,115	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	$ 22,089	$ 23,169