Fair Value of Derivative Instruments and Location in Financial Statements (Detail) - USD ($) $ in Thousands |
Jun. 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 | $ 1,530 | $ 809 |
| Accrued Expenses and Other Current Liabilities | Not Designated as Hedging Instrument | ||
| Derivatives Fair Value [Line Items] | ||
| Fair value of liabilities | 1,122 | 237 |
| Cash Flow Hedges | Prepaid Expenses and Other Current Assets | ||
| Derivatives Fair Value [Line Items] | ||
| Fair value of assets | 42,951 | 33,921 |
| Cash Flow Hedges | Other Assets | ||
| Derivatives Fair Value [Line Items] | ||
| Fair value of assets | 24,890 | 20,657 |
| Cash Flow Hedges | Accrued Expenses and Other Current Liabilities | ||
| Derivatives Fair Value [Line Items] | ||
| Fair value of liabilities | 6,780 | 4,540 |
| Cash Flow Hedges | Other Liabilities | ||
| Derivatives Fair Value [Line Items] | ||
| Fair value of liabilities | $ 8,893 | $ 12,576 |