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Shareholders' Equity - Additional Information (Detail) | Dec. 31, 2013 | Dec. 31, 2012 | May 14, 2008
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Stockholders Equity Note [Abstract] |  |  |
Repurchases of common stock authorized | 0 | 0 | 2,000,000
Common stock remaining authorized for repurchase | 2,000,000 |  |

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
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Data Type: | xbrli:sharesItemType
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- Definition The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix: | us-gaap_
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Balance Type: | na
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