Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Liabilities
Contingent consideration	$ (10,885)	$ (2,531)
Temporary Equity
Redeemable noncontrolling interest	(126,215)	(45,755)
Foreign currency exchange contracts
Assets
Foreign currency exchange contracts	3,748	1,122
Liabilities
Foreign currency exchange contracts		(1,360)
Interest rate swap agreements
Liabilities
Interest rate swap agreements	(56)	(131)
Level 1
Liabilities
Contingent consideration	0	0
Temporary Equity
Redeemable noncontrolling interest	0	0
Level 1 | Foreign currency exchange contracts
Assets
Foreign currency exchange contracts	0	0
Liabilities
Foreign currency exchange contracts		0
Level 1 | Interest rate swap agreements
Liabilities
Interest rate swap agreements	0	0
Level 2
Liabilities
Contingent consideration	0	0
Temporary Equity
Redeemable noncontrolling interest	0	0
Level 2 | Foreign currency exchange contracts
Assets
Foreign currency exchange contracts	3,748	1,122
Liabilities
Foreign currency exchange contracts		(1,360)
Level 2 | Interest rate swap agreements
Liabilities
Interest rate swap agreements	(56)	(131)
Level 3
Liabilities
Contingent consideration	(10,885)	(2,531)
Temporary Equity
Redeemable noncontrolling interest	(126,215)	(45,755)
Level 3 | Foreign currency exchange contracts
Assets
Foreign currency exchange contracts	0	0
Liabilities
Foreign currency exchange contracts		0
Level 3 | Interest rate swap agreements
Liabilities
Interest rate swap agreements	$ 0	$ 0