Loans Held for Investment Company's Investment in Impaired Loans (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Impaired Loans
Contractual Unpaid Principal Balance	$ 3,763	$ 2,311	$ 1,913
Recorded Investment	2,659	1,807	1,472
With Specific Allowance	0	0	0
Without Specific Allowance	2,659	1,807	1,472
Specific Allowance for Impaired Loans	0	0	0
Average Recorded Investment	2,698	2,004	1,878
Interest Income Recognized	60	124	148
Commercial and industrial
Impaired Loans
Contractual Unpaid Principal Balance		0	0
Recorded Investment		0	0
With Specific Allowance		0	0
Without Specific Allowance		0	0
Specific Allowance for Impaired Loans	0	0	0
Average Recorded Investment		15	11
Interest Income Recognized		0	0
Franchise
Impaired Loans
Contractual Unpaid Principal Balance	2,394
Recorded Investment	1,630
With Specific Allowance	0
Without Specific Allowance	1,630
Specific Allowance for Impaired Loans	0	0
Average Recorded Investment	1,647
Interest Income Recognized	0
Commercial owner occupied
Impaired Loans
Contractual Unpaid Principal Balance	436	441	440
Recorded Investment	361	398	388
With Specific Allowance	0	0	0
Without Specific Allowance	361	398	388
Specific Allowance for Impaired Loans	0	0	0
Average Recorded Investment	364	555	514
Interest Income Recognized	23	41	46
SBA
Impaired Loans
Contractual Unpaid Principal Balance		0	0
Recorded Investment		0	0
With Specific Allowance		0	0
Without Specific Allowance		0	0
Specific Allowance for Impaired Loans	0	0	0
Average Recorded Investment		6	5
Interest Income Recognized		0	0
Commercial non-owner occupied
Impaired Loans
Contractual Unpaid Principal Balance	693	1,221	1,217
Recorded Investment	443	883	848
With Specific Allowance	0	0	0
Without Specific Allowance	443	883	848
Specific Allowance for Impaired Loans	0	0	0
Average Recorded Investment	443	924	908
Interest Income Recognized	21	65	85
One-to-four family
Impaired Loans
Contractual Unpaid Principal Balance	203	649	256
Recorded Investment	203	526	236
With Specific Allowance	0	0	0
Without Specific Allowance	203	526	236
Specific Allowance for Impaired Loans	0	0	0
Average Recorded Investment	221	504	440
Interest Income Recognized	13	18	$ 17
Land
Impaired Loans
Contractual Unpaid Principal Balance	37
Recorded Investment	22
With Specific Allowance	0
Without Specific Allowance	22
Specific Allowance for Impaired Loans	0	$ 0
Average Recorded Investment	23
Interest Income Recognized	$ 3

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524

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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=49124121&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

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Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

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-Section 50

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