Loans Receivable Held for Investment - Aging of Recorded Investment in Past Due Loans by Loan Type (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Past due receivable
Total Past Due	$ 1,388	$ 1,445
Current	382,669	307,554
30-59 Days Past Due
Past due receivable
Total Past Due	1,324	989
60-89 Days Past Due
Past due receivable
Total Past Due	64
Greater than 90 Days Past Due
Past due receivable
Total Past Due		456
Single family
Past due receivable
Total Past Due	64	103
Current	105,268	131,492
Single family | 30-59 Days Past Due
Past due receivable
Total Past Due		103
Single family | 60-89 Days Past Due
Past due receivable
Total Past Due	64
Multi-family
Past due receivable
Total Past Due		291
Current	231,440	119,335
Multi-family | 30-59 Days Past Due
Past due receivable
Total Past Due		291
Commercial real estate
Past due receivable
Total Past Due	1,324
Current	7,597	11,412
Commercial real estate | 30-59 Days Past Due
Past due receivable
Total Past Due	1,324
Church
Past due receivable
Total Past Due		1,051
Current	37,223	44,698
Church | 30-59 Days Past Due
Past due receivable
Total Past Due		595
Church | Greater than 90 Days Past Due
Past due receivable
Total Past Due		456
Construction
Past due receivable
Current	827	343
Commercial - other
Past due receivable
Current	308	270
Consumer
Past due receivable
Current	$ 6	$ 4