Loans Receivable Held for Investment - Average of loans individually evaluated for impairment by loan type and related interest income (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Impaired loans
Average Recorded Investment	$ 20,043	$ 27,850
Cash Basis Interest Income Recognized	1,171	1,315
Foregone interest income if impaired loans had performed according to terms	708	1,300
Single family
Impaired loans
Average Recorded Investment	1,260	2,327
Cash Basis Interest Income Recognized	140	67
Multi-family
Impaired loans
Average Recorded Investment	1,912	3,425
Cash Basis Interest Income Recognized	136	79
Commercial real estate
Impaired loans
Average Recorded Investment	3,162	4,762
Cash Basis Interest Income Recognized	275	373
Church
Impaired loans
Average Recorded Investment	13,630	17,212
Cash Basis Interest Income Recognized	614	787
Commercial - other
Impaired loans
Average Recorded Investment	79	124
Cash Basis Interest Income Recognized	$ 6	$ 9

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- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5258-111524

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- Definition

Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

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- Definition

Reflects the amount of additional interest income that would have been recorded if impaired or nonperforming loans were instead current, in compliance with their original terms, and outstanding throughout the reporting period or since origination (if held for part of the period).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18794-111554

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