Fair Value of Assets and Liabilities Measured on Recurring Basis, Including Derivative Instruments (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands		Dec. 31, 2016		Dec. 31, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative instrument, asset	[1],[2]	$ 55,386		$ 30,380
Total, assets		55,386		30,380
Fair value of contingent earn-out consideration (ranging from $0 to $15,750)	[3],[5]	22,435	[4]	22,820
Derivative instrument, liability	[2],[3]	17,353		59,620
Total, liabilities		39,788		82,440
Redeemable non-controlling interest	[4]	4,520
Fair Value, Inputs, Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative instrument, asset	[1],[2]	55,386		30,380
Total, assets		55,386		30,380
Derivative instrument, liability	[2],[3]	17,353		59,620
Total, liabilities		17,353		59,620
Fair Value, Inputs, Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of contingent earn-out consideration (ranging from $0 to $15,750)	[3],[5]	22,435	[4]	22,820
Total, liabilities		22,435		$ 22,820
Redeemable non-controlling interest	[4]	$ 4,520

[1] Included in prepaid expenses and other current assets and other assets in the consolidated balance sheets.

[2] The Company values its derivative instruments based on market observable inputs, including both forward and spot prices for the relevant currencies and interest rate indices for relevant interest rates. The quotes are taken from an independent market database

[3] Included in accrued expenses and other current liabilities and other liabilities in the consolidated balance sheets.

[4] The Company’s estimate of the fair value of redeemable non-controlling interest as of December 31, 2016 is based on unobservable inputs considering the assumptions that market participants would make in pricing the obligation. Given the significance of the unobservable inputs, the valuation was classified in level 3 of the fair value hierarchy. Refer to Note 3—Business Acquisitions.

[5] The fair value of earn-out consideration, calculated as the present value of expected future payments to be made to the sellers of acquired businesses, was derived by estimating the future financial performance of the acquired businesses using the earn-out formula and performance targets specified in each purchase agreement and adjusting the result to reflect the Company’s estimate of the likelihood of achievement of such targets. Given the significance of the unobservable inputs, the valuations are classified in level 3 of the fair value hierarchy.