Loans Receivable Held for Investment - Risk category of loans by loan type (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Credit Quality Indicators
Loans receivable	$ 308,999	$ 285,108
Single family
Credit Quality Indicators
Loans receivable	131,595	40,055
Multi-family
Credit Quality Indicators
Loans receivable	119,626	173,550
Commercial real estate
Credit Quality Indicators
Loans receivable	11,412	16,719
Church
Credit Quality Indicators
Loans receivable	45,749	54,127
Construction
Credit Quality Indicators
Loans receivable	343	387
Commercial - other
Credit Quality Indicators
Loans receivable	270	261
Consumer
Credit Quality Indicators
Loans receivable	4	9
Pass
Credit Quality Indicators
Loans receivable	289,410	262,039
Pass | Single family
Credit Quality Indicators
Loans receivable	128,736	35,850
Pass | Multi-family
Credit Quality Indicators
Loans receivable	117,602	170,700
Pass | Commercial real estate
Credit Quality Indicators
Loans receivable	7,509	13,218
Pass | Church
Credit Quality Indicators
Loans receivable	35,013	41,716
Pass | Construction
Credit Quality Indicators
Loans receivable	343	387
Pass | Commercial - other
Credit Quality Indicators
Loans receivable	203	159
Pass | Consumer
Credit Quality Indicators
Loans receivable	4	9
Watch
Credit Quality Indicators
Loans receivable	776
Watch | Church
Credit Quality Indicators
Loans receivable	776
Special Mention
Credit Quality Indicators
Loans receivable	4,340	6,564
Special Mention | Single family
Credit Quality Indicators
Loans receivable	2,557	3,465
Special Mention | Multi-family
Credit Quality Indicators
Loans receivable	352	613
Special Mention | Commercial real estate
Credit Quality Indicators
Loans receivable		284
Special Mention | Church
Credit Quality Indicators
Loans receivable	1,431	2,202
Substandard
Credit Quality Indicators
Loans receivable	14,473	16,505
Substandard | Single family
Credit Quality Indicators
Loans receivable	302	740
Substandard | Multi-family
Credit Quality Indicators
Loans receivable	1,672	2,237
Substandard | Commercial real estate
Credit Quality Indicators
Loans receivable	3,903	3,217
Substandard | Church
Credit Quality Indicators
Loans receivable	8,529	10,209
Substandard | Commercial - other
Credit Quality Indicators
Loans receivable	$ 67	$ 102