Commitments and Contingencies - Guarantees Outstanding (Details) - Loans Sold or Securitized With Recourse - Loans Sold or Securitized with Recourse - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Guarantor obligation, maximum potential future payment [Abstract]
Expire in One Year or Less	$ 7
Expire After One Year Through Three Years	17
Expire After Three Years Through Five Years	186
Expire After Five Years	20,199
Total	20,409	$ 20,884
Carrying Value	24,169	24,908
Single Family Residential
Guarantor obligation, maximum potential future payment [Abstract]
Expire in One Year or Less	7
Expire After One Year Through Three Years	17
Expire After Three Years Through Five Years	26
Expire After Five Years	5,363
Total	5,413	5,888
Carrying Value	5,413	5,888
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	160
Expire After Five Years	14,836
Total	14,996	14,996
Carrying Value	$ 18,756	$ 19,020