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Subsequent Event - Additional Information (Detail) (Subsequent Event [Member], USD $)
In Thousands, except Per Share data, unless otherwise specified
1 Months Ended
Oct. 29, 2013
Subsequent Event [Member]
 
Subsequent Event [Line Items]  
Special cash dividend $ 1.50
Special dividend payout expected $ 17,000
Dividend payable date, declared day Oct. 29, 2013
Dividend Payable Date Dec. 05, 2013
Dividend payable, ex-dividend date Nov. 19, 2013