Loans Held for Investment - Company's Investment in Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Impaired Loans
Contractual Unpaid Principal Balance	$ 4,644	$ 3,615	$ 4,319
Total impaired loans	3,054	2,922	2,784
With Specific Allowance	1,461	0	1,461
Without Specific Allowance	1,593	2,922	1,323
Specific Allowance for Impaired Loans	731	0	731
Average Recorded Investment	2,892	1,699	2,543
Interest Income Recognized	49	24	123
Commercial and industrial
Impaired Loans
Contractual Unpaid Principal Balance	373		578
Total impaired loans	306		313
With Specific Allowance	0		0
Without Specific Allowance	306		313
Specific Allowance for Impaired Loans	0	0	0
Average Recorded Investment	308		90
Interest Income Recognized	5		29
Franchise
Impaired Loans
Contractual Unpaid Principal Balance	2,394	2,225	2,394
Total impaired loans	1,630	1,853	1,630
With Specific Allowance	1,461	0	1,461
Without Specific Allowance	169	1,853	169
Specific Allowance for Impaired Loans	731	0	731
Average Recorded Investment	1,629	618	1,386
Interest Income Recognized	27	0	3
Commercial owner occupied
Impaired Loans
Contractual Unpaid Principal Balance	870	438	883
Total impaired loans	507	379	536
With Specific Allowance	0	0	0
Without Specific Allowance	507	379	536
Specific Allowance for Impaired Loans	0	0	0
Average Recorded Investment	518	382	415
Interest Income Recognized	9	7	67
SBA
Impaired Loans
Contractual Unpaid Principal Balance	414
Total impaired loans	69
With Specific Allowance	0
Without Specific Allowance	69
Specific Allowance for Impaired Loans	0	0	0
Average Recorded Investment	23
Interest Income Recognized	0
Commercial non-owner occupied
Impaired Loans
Contractual Unpaid Principal Balance	0	698	329
Total impaired loans	0	458	214
With Specific Allowance	0	0	0
Without Specific Allowance	0	458	214
Specific Allowance for Impaired Loans	0	0	0
Average Recorded Investment	143	465	430
Interest Income Recognized	2	12	19
One-to-four family
Impaired Loans
Contractual Unpaid Principal Balance	556	254	98
Total impaired loans	523	232	70
With Specific Allowance	0	0	0
Without Specific Allowance	523	232	70
Specific Allowance for Impaired Loans	0	0	0
Average Recorded Investment	251	234	204
Interest Income Recognized	5	5	5
Land
Impaired Loans
Contractual Unpaid Principal Balance	37		37
Total impaired loans	19		21
With Specific Allowance	0		0
Without Specific Allowance	19		21
Specific Allowance for Impaired Loans	0	$ 0	0
Average Recorded Investment	20		13
Interest Income Recognized	$ 1		$ 0

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
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5258-111524

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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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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953550-111524

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