Loans Held for Investment - Company's Investment in Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Impaired Loans
Contractual Unpaid Principal Balance	$ 6,221		$ 6,221		$ 4,319
Total impaired loans	3,481		3,481		2,784
With Specific Allowance	1,461		1,461		1,461
Without Specific Allowance	2,021		2,021		1,323
Specific Allowance for Impaired Loans	731	$ 223	731	$ 223	731
Average Recorded Investment	2,964	2,846	2,928	2,241	2,538
Interest Income Recognized	51	46	99	70	123
Commercial and industrial
Impaired Loans
Contractual Unpaid Principal Balance	1,519		1,519		578
Total impaired loans	1,051		1,051		313
With Specific Allowance	0		0		0
Without Specific Allowance	1,051		1,051		313
Specific Allowance for Impaired Loans	0	223	0	223	0
Average Recorded Investment	350	74	329	4	90
Interest Income Recognized	8	0	13	0	29
Franchise
Impaired Loans
Contractual Unpaid Principal Balance	2,225		2,225		2,394
Total impaired loans	1,461		1,461		1,630
With Specific Allowance	1,461		1,461		1,461
Without Specific Allowance	0		0		169
Specific Allowance for Impaired Loans	731	0	731	0	731
Average Recorded Investment	1,461	1,723	1,546	1,171	1,386
Interest Income Recognized	24	0	51	0	3
Commercial owner occupied
Impaired Loans
Contractual Unpaid Principal Balance	865		865		883
Total impaired loans	486		486		536
With Specific Allowance	0		0		0
Without Specific Allowance	486		486		536
Specific Allowance for Impaired Loans	0	0	0	0	0
Average Recorded Investment	494	373	506	378	415
Interest Income Recognized	9	15	18	22	67
SBA
Impaired Loans
Contractual Unpaid Principal Balance	1,394		1,394
Total impaired loans	328		328
With Specific Allowance	0		0
Without Specific Allowance	329		329
Specific Allowance for Impaired Loans	0	0	0	0
Average Recorded Investment	247		135
Interest Income Recognized	4		4
Commercial non-owner occupied
Impaired Loans
Contractual Unpaid Principal Balance	0		0		329
Total impaired loans	0		0		214
With Specific Allowance	0		0		0
Without Specific Allowance	0		0		214
Specific Allowance for Impaired Loans	0	0	0	0	0
Average Recorded Investment	0	446	71	456	430
Interest Income Recognized	0	21	2	33	19
One-to-four family
Impaired Loans
Contractual Unpaid Principal Balance	181		181		98
Total impaired loans	137		137		70
With Specific Allowance	0		0		0
Without Specific Allowance	137		137		70
Specific Allowance for Impaired Loans	0	0	0	0	0
Average Recorded Investment	393	222	322	228	204
Interest Income Recognized	5	10	10	15	5
Land
Impaired Loans
Contractual Unpaid Principal Balance	37		37		37
Total impaired loans	18		18		21
With Specific Allowance	0		0		0
Without Specific Allowance	18		18		21
Specific Allowance for Impaired Loans	0	0	0	0	0
Average Recorded Investment	19	8	19	4	13
Interest Income Recognized	$ 1	$ 0	$ 1	$ 0	$ 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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