Loans Held for Investment - Company's Investment in Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Impaired Loans
Contractual Unpaid Principal Balance	$ 2,882	$ 7,029
Total impaired loans	513	1,141
With Specific Allowance	0	250
Without Specific Allowance	513	891
Specific Allowance for Impaired Loans	0	250	$ 731
Average Recorded Investment	829	4,377	2,892
Interest Income Recognized	17	124	49
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	250	0
Average Recorded Investment	200	1,410	308
Interest Income Recognized	5	47	5
Franchise
Impaired Loans
Specific Allowance for Impaired Loans	0		731
Average Recorded Investment	0	0	1,629
Interest Income Recognized	0	0	27
Commercial owner occupied
Impaired Loans
Contractual Unpaid Principal Balance	118	847
Total impaired loans	86	436
With Specific Allowance	0	0
Without Specific Allowance	86	436
Specific Allowance for Impaired Loans	0	0	0
Average Recorded Investment	192	493	518
Interest Income Recognized	3	10	9
SBA
Impaired Loans
Contractual Unpaid Principal Balance	2,442	3,865
Total impaired loans	298	316
With Specific Allowance	0	0
Without Specific Allowance	298	316
Specific Allowance for Impaired Loans	0	0	0
Average Recorded Investment	307	672	23
Interest Income Recognized	5	13	0
Commercial non-owner occupied
Impaired Loans
Specific Allowance for Impaired Loans	0		0
Average Recorded Investment	0	1,658	143
Interest Income Recognized	0	49	2
One-to-four family
Impaired Loans
Contractual Unpaid Principal Balance	286	291
Total impaired loans	115	124
With Specific Allowance	0	0
Without Specific Allowance	115	124
Specific Allowance for Impaired Loans	0	0	0
Average Recorded Investment	116	128	251
Interest Income Recognized	3	4	5
Land
Impaired Loans
Contractual Unpaid Principal Balance	36	36
Total impaired loans	14	15
With Specific Allowance	0	0
Without Specific Allowance	14	15
Specific Allowance for Impaired Loans	0	0	0
Average Recorded Investment	14	16	20
Interest Income Recognized	$ 1	$ 1	$ 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=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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