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Derivative Financial Instruments - Additional Information (Details) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2016 USD ($) item | Sep. 30, 2015 USD ($) | Sep. 30, 2016 USD ($) item | Sep. 30, 2015 USD ($) | Sep. 22, 2016 USD ($) | Dec. 31, 2015 USD ($)
Derivative [Line Items] |  |  |  |  |  |
Foreign currency unrealized losses expected to be reclassified into earnings over next twelve months | $ (9,800,000) |  | $ (9,800,000) |  |  |
Interest Rate Swap Agreements |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional amount | $ 50,000,000 |  | $ 50,000,000 |  |  |
Number of derivative contracts | item | 2 |  | 2 |  |  |
Interest Rate Swap Agreements | U.S. dollars |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Variable Rate Basis |  |  | LIBOR |  |  |
Swaps matured in September 2016 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional amount | $ 50,000,000 |  | $ 50,000,000 |  |  |
Swaps maturing March 2017 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Average fixed interest rate (as a percent) | 1.09% |  | 1.09% |  |  |
Swaps maturing September 2019 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Average fixed interest rate (as a percent) | 0.89% |  | 0.89% |  |  |
Treasury Lock | Interest Lock Agreement |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional amount |  |  |  |  | $ 150,000,000 |
Carrying value / fair value of derivative liabilities included in other liabilities | $ 900,000 |  | $ 900,000 |  |  |
Derivative agreement date |  |  | Sep. 22, 2016 |  |  |
Foreign Currency Forward Exchange Contracts |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Number of credit contingency features | item |  |  | 0 |  |  |
Foreign Currency Forward Exchange Contracts | Cash Flow Hedging |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Gains (losses) in other comprehensive income, effective portion | (1,400,000) | $ (300,000) | $ (10,700,000) | $ (16,300,000) |  |
Designated as Hedging Instrument | Interest Rate Swap Agreements |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional amount | 100,000,000 |  | 100,000,000 |  |  |
Carrying value / fair value of derivative liabilities included in other liabilities | 100,000 |  | 100,000 |  |  | $ 100,000
Designated as Hedging Instrument | Swaps maturing March 2017 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional amount | 50,000,000 |  | 50,000,000 |  |  |
Designated as Hedging Instrument | Swaps maturing September 2019 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional amount | 50,000,000 |  | 50,000,000 |  |  |
Designated as Hedging Instrument | Foreign Currency Forward Exchange Contracts |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional amount | 389,100,000 |  | 389,100,000 |  |  | 417,500,000
Carrying value / fair value of derivative liabilities included in other liabilities | 20,000,000 |  | 20,000,000 |  |  | 22,100,000
Carrying value / fair value of derivative assets included in other assets | 1,800,000 |  | 1,800,000 |  |  | 900,000
Designated as Hedging Instrument | Foreign Currency Forward Exchange Contracts | Cash Flow Hedging |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Net gain (loss) recognized in gross margin | (5,000,000) | (4,200,000) | (13,500,000) | (13,000,000) |  |
Not Designated as Hedging Instrument | Foreign Currency Forward Exchange Contracts |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Carrying value / fair value of derivative liabilities included in other liabilities | 100,000 |  | 100,000 |  |  | 400,000
Carrying value / fair value of derivative assets included in other assets | 200,000 |  | 200,000 |  |  | $ 400,000
Net gains (losses) on derivative contracts not designated as hedges | $ 800,000 | $ 1,500,000 | $ 3,400,000 | $ (12,500,000) |  |

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