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Fair Value Measurements - Additional Information (Detail) (USD $)
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3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2014
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Mar. 31, 2013
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Mar. 31, 2014
Impaired Loans
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Mar. 31, 2013
Impaired Loans
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Mar. 31, 2014
Impaired Loans
Level 3
Minimum
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Dec. 31, 2013
Impaired Loans
Level 3
Minimum
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Mar. 31, 2014
Impaired Loans
Level 3
Maximum
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Dec. 31, 2013
Impaired Loans
Level 3
Maximum
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Mar. 31, 2014
Foreclosed Real Estate
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Mar. 31, 2013
Foreclosed Real Estate
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Mar. 31, 2014
Foreclosed Real Estate
Level 3
Minimum
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Dec. 31, 2013
Foreclosed Real Estate
Level 3
Minimum
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Mar. 31, 2014
Foreclosed Real Estate
Level 3
Maximum
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Dec. 31, 2013
Foreclosed Real Estate
Level 3
Maximum
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||||||||
| Fair value measurement, estimated costs to sell the collateral | 10.00% | 10.00% | 48.00% | 48.00% | 19.00% | 38.00% | ||||||||
| Provisions for loan losses | $ 25,000 | $ 250,000 | $ 13,000 | $ 45,000 | ||||||||||
| Fair value measurement, discount rate | 10.00% | 38.00% | ||||||||||||
| Foreclosed real estate write down charges | $ 0 | $ 32,000 | ||||||||||||