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Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Income Taxes [Line Items]          
Effective tax rate 25.50% 29.10% 26.00% 29.00%  
Gross unrecognized tax benefits excluding interest and penalties $ 23,740   $ 23,740   $ 4,332
Net unrecognized tax benefit excluding interest and penalties that would impact effective tax rate 20,000   20,000    
Accrued interest on unrecognized tax benefits $ 746   746   $ 157
Net unrecognized tax benefits, excluding interest and penalties, related to foreign tax positions     $ 3,015    
Income tax examination, description     The Company and its subsidiaries are subject to examination by U.S. federal, state and foreign tax authorities. The United States Internal Revenue Service commenced an examination of the Company's U.S. federal tax filings for tax years 2011 through 2013 during the quarter ended March 31, 2015.    
Earliest Tax Year [Member] | Internal Revenue Service (IRS) [Member]          
Income Taxes [Line Items]          
Open tax year     2011