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Income Taxes - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Income Tax Disclosure [Abstract]          
Effective tax rate 31.30% 31.20% 23.90% 16.20%  
Gross unrecognized tax benefits excluding interest and penalties $ 42,794   $ 42,794   $ 47,684
Net unrecognized tax benefit excluding interest and penalties that would impact effective tax rate 20,536   20,536    
Accrued interest on unrecognized tax benefits $ 1,961   $ 1,961   $ 2,159
Income tax examination, description     The Company and its subsidiaries are subject to examination by federal, state and foreign tax authorities. The Internal Revenue Service commenced an examination of the Company's U.S. federal tax filings for tax years 2007 through 2009 during the quarter ended June 30, 2012.