Loans Held for Investment - Company's Investment in Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Impaired Loans
Contractual Unpaid Principal Balance	$ 556			$ 556		$ 7,029
Total impaired loans	395			395		1,141
With Specific Allowance	0			0		250
Without Specific Allowance	395			395		891
Specific Allowance for Impaired Loans	0		$ 731	0	$ 731	250
Average Recorded Investment	471	$ 829	2,964	829	2,928
Interest Income Recognized	10	17	51	27	99
Commercial and industrial
Impaired Loans
Contractual Unpaid Principal Balance						1,990
Total impaired loans						250
With Specific Allowance						250
Without Specific Allowance						0
Specific Allowance for Impaired Loans	0		0	0	0	250
Average Recorded Investment	7	200	350	200	329
Interest Income Recognized	0	5	8	5	13
Franchise
Impaired Loans
Specific Allowance for Impaired Loans	0		731	0	731
Average Recorded Investment	0	0	1,461	0	1,546
Interest Income Recognized	0	0	24	0	51
Commercial owner occupied
Impaired Loans
Contractual Unpaid Principal Balance	240			240		847
Total impaired loans	206			206		436
With Specific Allowance	0			0		0
Without Specific Allowance	206			206		436
Specific Allowance for Impaired Loans	0		0	0	0	0
Average Recorded Investment	125	192	494	192	506
Interest Income Recognized	2	3	9	5	18
SBA
Impaired Loans
Contractual Unpaid Principal Balance	146			146		3,865
Total impaired loans	73			73		316
With Specific Allowance	0			0		0
Without Specific Allowance	73			73		316
Specific Allowance for Impaired Loans	0		0	0	0	0
Average Recorded Investment	222	307	247	307	135
Interest Income Recognized	4	5	4	9	4
Commercial non-owner occupied
Impaired Loans
Specific Allowance for Impaired Loans	0		0	0	0
Average Recorded Investment				0	71
Interest Income Recognized				0	2
One-to-four family
Impaired Loans
Contractual Unpaid Principal Balance	135			135		291
Total impaired loans	104			104		124
With Specific Allowance	0			0		0
Without Specific Allowance	104			104		124
Specific Allowance for Impaired Loans	0		0	0	0	0
Average Recorded Investment	105	116	393	116	322
Interest Income Recognized	3	3	5	6	10
Land
Impaired Loans
Contractual Unpaid Principal Balance	35			35		36
Total impaired loans	12			12		15
With Specific Allowance	0			0		0
Without Specific Allowance	12			12		15
Specific Allowance for Impaired Loans	0		0	0	0	$ 0
Average Recorded Investment	12	14	19	14	19
Interest Income Recognized	$ 1	$ 1	$ 1	$ 2	$ 1

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=84173941&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=84173941&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=84173941&loc=d3e5258-111524

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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=84173941&loc=SL6953550-111524

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