Loans Receivable Held for Investment - Aging of recorded investment in past due loans by loan type (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Past due receivable
Total Past Due, Loans receivable	$ 2,076	$ 1,445
Current	343,733	307,554
30 to 59 Days Past Due
Past due receivable
Total Past Due, Loans receivable	2,076	989
Greater than 90 Days Past Due
Past due receivable
Total Past Due, Loans receivable		456
Single family
Past due receivable
Total Past Due, Loans receivable	69	103
Current	115,921	131,492
Single family | 30 to 59 Days Past Due
Past due receivable
Total Past Due, Loans receivable	69	103
Multi-family
Past due receivable
Total Past Due, Loans receivable	310	291
Current	174,577	119,335
Multi-family | 30 to 59 Days Past Due
Past due receivable
Total Past Due, Loans receivable	310	291
Commercial real estate
Past due receivable
Total Past Due, Loans receivable	1,697
Current	9,043	11,412
Commercial real estate | 30 to 59 Days Past Due
Past due receivable
Total Past Due, Loans receivable	1,697
Church
Past due receivable
Total Past Due, Loans receivable		1,051
Current	43,553	44,698
Church | 30 to 59 Days Past Due
Past due receivable
Total Past Due, Loans receivable		595
Church | Greater than 90 Days Past Due
Past due receivable
Total Past Due, Loans receivable		456
Construction
Past due receivable
Current	320	343
Commercial - other
Past due receivable
Current	304	270
Consumer
Past due receivable
Current	$ 15	$ 4