Loans Receivable Held for Investment - Risk category of loans by loan type (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Credit Quality Indicators
Loans receivable	$ 345,809	$ 308,999
Single family
Credit Quality Indicators
Loans receivable	115,990	131,595
Multi-family
Credit Quality Indicators
Loans receivable	174,887	119,626
Commercial real estate
Credit Quality Indicators
Loans receivable	10,740	11,412
Church
Credit Quality Indicators
Loans receivable	43,553	45,749
Construction
Credit Quality Indicators
Loans receivable	320	343
Commercial - other
Credit Quality Indicators
Loans receivable	304	270
Consumer
Credit Quality Indicators
Loans receivable	15	4
Pass
Credit Quality Indicators
Loans receivable	328,233	289,410
Pass | Single family
Credit Quality Indicators
Loans receivable	115,596	128,736
Pass | Multi-family
Credit Quality Indicators
Loans receivable	170,936	117,602
Pass | Commercial real estate
Credit Quality Indicators
Loans receivable	7,077	7,509
Pass | Church
Credit Quality Indicators
Loans receivable	34,051	35,013
Pass | Construction
Credit Quality Indicators
Loans receivable	320	343
Pass | Commercial - other
Credit Quality Indicators
Loans receivable	238	203
Pass | Consumer
Credit Quality Indicators
Loans receivable	15	4
Watch
Credit Quality Indicators
Loans receivable	1,211	776
Watch | Multi-family
Credit Quality Indicators
Loans receivable	490
Watch | Church
Credit Quality Indicators
Loans receivable	721	776
Special Mention
Credit Quality Indicators
Loans receivable	1,312	4,340
Special Mention | Single family
Credit Quality Indicators
Loans receivable	133	2,557
Special Mention | Multi-family
Credit Quality Indicators
Loans receivable	347	352
Special Mention | Church
Credit Quality Indicators
Loans receivable	832	1,431
Substandard
Credit Quality Indicators
Loans receivable	15,053	14,473
Substandard | Single family
Credit Quality Indicators
Loans receivable	261	302
Substandard | Multi-family
Credit Quality Indicators
Loans receivable	3,114	1,672
Substandard | Commercial real estate
Credit Quality Indicators
Loans receivable	3,663	3,903
Substandard | Church
Credit Quality Indicators
Loans receivable	7,949	8,529
Substandard | Commercial - other
Credit Quality Indicators
Loans receivable	$ 66	$ 67