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Share-Based Payments - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 3 Months Ended 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Sep. 23, 2009
LTIP [Member]
Mar. 31, 2014
LTIP [Member]
Restricted Stock and Restricted Stock Units [Member]
Mar. 31, 2013
LTIP [Member]
Restricted Stock and Restricted Stock Units [Member]
Mar. 31, 2014
LTIP [Member]
Restricted Stock [Member]
Mar. 31, 2014
LTIP [Member]
RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Percentage of issued and outstanding shares of common stock provides for grants of restricted common stock, restricted stock units and other equity-based awards     7.50%        
Recognized stock-based compensation expense $ 426 $ 883   $ 426 $ 883    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized           482 2,135
Common stock, shares delivered             237,008
Stock units vested             288,750
Adjustment to additional paid in capital, tax liability             $ 847