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Loans and Allowance for Loan Losses - Schedule of Average Net Investment Impaired Loans and Interest Income Recognized and Received on Impaired Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable Impaired [Line Items]
Average Recorded Investment	$ 7,117	$ 14,743
Interest Income Recognized	119	552
Interest Income Received	122	540
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Financing Receivable Impaired [Line Items]
Average Recorded Investment	1,493	2,769
Interest Income Recognized	44	46
Interest Income Received	46	46
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Financing Receivable Impaired [Line Items]
Average Recorded Investment	139	143
Interest Income Recognized	14	3
Interest Income Received	14	3
Real Estate [Member] | Secured by Multi-family Residential Properties [Member]
Financing Receivable Impaired [Line Items]
Average Recorded Investment	1,892	3,565
Interest Income Recognized		178
Interest Income Received		170
Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member]
Financing Receivable Impaired [Line Items]
Average Recorded Investment	3,329	8,186
Interest Income Recognized	35	324
Interest Income Received	36	320
Commercial and Industrial Loans [Member]
Financing Receivable Impaired [Line Items]
Average Recorded Investment	264	80
Interest Income Recognized	26	1
Interest Income Received	$ 26	$ 1

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- Definition

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+ References

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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.

+ 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)(2)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5212-111524

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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 15
-Subparagraph (c)(3)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5212-111524

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