Loans Receivable Held for Investment - Activity in the Allowance for Loan Losses by Loan Type (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Allowance for loan losses:
Beginning balance	$ 2,771	$ 4,183	$ 2,929	$ 4,069
Provision for (recapture of) loan losses	47	(1,000)	(301)	(1,000)
Recoveries			190	114
Ending balance	2,818	3,183	2,818	3,183
Single family
Allowance for loan losses:
Beginning balance	328	517	369	594
Provision for (recapture of) loan losses		(120)	(41)	(197)
Ending balance	328	397	328	397
Multi-family
Allowance for loan losses:
Beginning balance	1,932	2,656	1,880	2,300
Provision for (recapture of) loan losses	66	(791)	118	(435)
Ending balance	1,998	1,865	1,998	1,865
Commercial real estate
Allowance for loan losses:
Beginning balance	58	61	52	71
Provision for (recapture of) loan losses		(6)	6	(16)
Ending balance	58	55	58	55
Church
Allowance for loan losses:
Beginning balance	401	925	603	1,081
Provision for (recapture of) loan losses	(24)	(87)	(416)	(357)
Recoveries			190	114
Ending balance	377	838	377	838
Construction
Allowance for loan losses:
Beginning balance	44	18	19	17
Provision for (recapture of) loan losses	6	3	31	4
Ending balance	50	21	50	21
Commercial - other
Allowance for loan losses:
Beginning balance	5	6	6	6
Provision for (recapture of) loan losses		(1)	(1)	(1)
Ending balance	5	5	5	5
Consumer
Allowance for loan losses:
Beginning balance	3
Provision for (recapture of) loan losses	(1)	2	2	2
Ending balance	$ 2	$ 2	$ 2	$ 2

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- Definition

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
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- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
-Section S99
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Amount of expense related to loss from loan transactions.

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-SubTopic 220
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