Loans Receivable Held for Investment - Aging of recorded investment in past due loans by loan type (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Past due receivable
Total Past Due, Loans receivable		$ 1,445
Current	$ 349,330	307,554
30 to 59 Days Past Due
Past due receivable
Total Past Due, Loans receivable		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		103
Current	110,557	131,492
Single family | 30 to 59 Days Past Due
Past due receivable
Total Past Due, Loans receivable		103
Multi-family
Past due receivable
Total Past Due, Loans receivable		291
Current	191,337	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	8,972	11,412
Church
Past due receivable
Total Past Due, Loans receivable		1,051
Current	37,838	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	308	343
Commercial - other
Past due receivable
Current	309	270
Consumer
Past due receivable
Current	$ 9	$ 4