Fair Value of Derivative Instruments and Location in Financial Statements (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Prepaid Expenses and Other Current Assets | Not Designated as Hedging Instrument
Derivatives Fair Value [Line Items]
Fair value of assets	$ 883	$ 809
Accrued Expenses and Other Current Liabilities | Not Designated as Hedging Instrument
Derivatives Fair Value [Line Items]
Fair value of liabilities	2,522	237
Cash Flow Hedges | Prepaid Expenses and Other Current Assets
Derivatives Fair Value [Line Items]
Fair value of assets	33,345	33,921
Cash Flow Hedges | Other Assets
Derivatives Fair Value [Line Items]
Fair value of assets	20,852	20,657
Cash Flow Hedges | Accrued Expenses and Other Current Liabilities
Derivatives Fair Value [Line Items]
Fair value of liabilities	12,005	4,540
Cash Flow Hedges | Other Liabilities
Derivatives Fair Value [Line Items]
Fair value of liabilities	$ 13,236	$ 12,576