Loans Receivable Held for Investment - Aging of recorded investment in past due loans by loan type (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Past due receivable
Total Past Due, Loans receivable	$ 1,119	$ 1,445
Current	323,296	307,554
30 to 59 Days Past Due
Past due receivable
Total Past Due, Loans receivable	651	989
60 to 89 Days Past Due
Past due receivable
Total Past Due, Loans receivable	5
Greater than 90 Days Past Due
Past due receivable
Total Past Due, Loans receivable	463	456
Single family
Past due receivable
Total Past Due, Loans receivable	78	103
Current	124,587	131,492
Single family | 30 to 59 Days Past Due
Past due receivable
Total Past Due, Loans receivable	73	103
Single family | 60 to 89 Days Past Due
Past due receivable
Total Past Due, Loans receivable	5
Multi-family
Past due receivable
Total Past Due, Loans receivable		291
Current	143,967	119,335
Multi-family | 30 to 59 Days Past Due
Past due receivable
Total Past Due, Loans receivable		291
Commercial real estate
Past due receivable
Current	11,080	11,412
Church
Past due receivable
Total Past Due, Loans receivable	1,041	1,051
Current	43,035	44,698
Church | 30 to 59 Days Past Due
Past due receivable
Total Past Due, Loans receivable	578	595
Church | Greater than 90 Days Past Due
Past due receivable
Total Past Due, Loans receivable	463	456
Construction
Past due receivable
Current	332	343
Commercial - other
Past due receivable
Current	289	270
Consumer
Past due receivable
Current	$ 6	$ 4