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Restructuring Charges - Schedule of Changes in Future Minimum Lease Obligations (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Restructuring And Related Activities [Abstract]        
Balance, Beginning of Period $ 11,618 $ 3,609 $ 12,892 $ 7,094
Charges Incurred 5,984 2,171 9,082 6,420
Net Cash Payments (2,723) (1,619) (8,000) (9,713)
Other 2,261 1,319 3,166 1,679
Balance, End of Period $ 17,140 $ 5,480 $ 17,140 $ 5,480