Loans Receivable Held for Investment - Risk category of loans by loan type (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Credit Quality Indicators
Loans receivable	$ 324,415	$ 308,999
Single family
Credit Quality Indicators
Loans receivable	124,665	131,595
Multi-family
Credit Quality Indicators
Loans receivable	143,967	119,626
Commercial real estate
Credit Quality Indicators
Loans receivable	11,080	11,412
Church
Credit Quality Indicators
Loans receivable	44,076	45,749
Construction
Credit Quality Indicators
Loans receivable	332	343
Commercial - other
Credit Quality Indicators
Loans receivable	289	270
Consumer
Credit Quality Indicators
Loans receivable	6	4
Pass
Credit Quality Indicators
Loans receivable	306,240	289,410
Pass | Single family
Credit Quality Indicators
Loans receivable	122,163	128,736
Pass | Multi-family
Credit Quality Indicators
Loans receivable	141,922	117,602
Pass | Commercial real estate
Credit Quality Indicators
Loans receivable	7,170	7,509
Pass | Church
Credit Quality Indicators
Loans receivable	34,425	35,013
Pass | Construction
Credit Quality Indicators
Loans receivable	332	343
Pass | Commercial - other
Credit Quality Indicators
Loans receivable	222	203
Pass | Consumer
Credit Quality Indicators
Loans receivable	6	4
Watch
Credit Quality Indicators
Loans receivable	1,218	776
Watch | Multi-family
Credit Quality Indicators
Loans receivable	493
Watch | Church
Credit Quality Indicators
Loans receivable	725	776
Special Mention
Credit Quality Indicators
Loans receivable	3,406	4,340
Special Mention | Single family
Credit Quality Indicators
Loans receivable	2,220	2,557
Special Mention | Multi-family
Credit Quality Indicators
Loans receivable	350	352
Special Mention | Church
Credit Quality Indicators
Loans receivable	836	1,431
Substandard
Credit Quality Indicators
Loans receivable	13,551	14,473
Substandard | Single family
Credit Quality Indicators
Loans receivable	282	302
Substandard | Multi-family
Credit Quality Indicators
Loans receivable	1,202	1,672
Substandard | Commercial real estate
Credit Quality Indicators
Loans receivable	3,910	3,903
Substandard | Church
Credit Quality Indicators
Loans receivable	8,090	8,529
Substandard | Commercial - other
Credit Quality Indicators
Loans receivable	$ 67	$ 67