Activity Related to Liability for Special Charges (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($)
Special Charges [Line Items]
Beginning Balance	$ 11,560
Additions	36,535
Reductions	(19,414)
Foreign currency translation adjustment and other	140
Ending Balance	28,821	[1]
Employee Termination Costs
Special Charges [Line Items]
Beginning Balance	8,225
Additions	15,980
Reductions	(15,947)
Foreign currency translation adjustment and other	153
Ending Balance	8,411
Lease Termination Costs
Special Charges [Line Items]
Beginning Balance	3,335
Additions	19,985
Reductions	(2,941)
Foreign currency translation adjustment and other	(19)
Ending Balance	20,360
Other Costs
Special Charges [Line Items]
Additions	570
Reductions	(526)
Foreign currency translation adjustment and other	6
Ending Balance	$ 50

[1] Of the $28.8 million remaining liability for the special charges, $5.2 million is expected to be paid in the remainder of 2017, $10.5 million is expected to be paid in 2018, $4.8 million is expected to be paid in 2019, $4.0 million is expected to be paid in 2020 and the remaining balance of $4.3 million is expected to be paid from 2021 to 2025.