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

X

- Details

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X

- 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

Name:	us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
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X

- 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

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Namespace Prefix:	us-gaap_
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Balance Type:	na
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