Derivative Financial Instruments - Additional Information (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) item	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Derivative [Line Items]
Foreign currency unrealized losses expected to be reclassified into earnings over next twelve months	$ (10,900,000)
Foreign currency unrealized losses expected to be reclassified into earnings over next twelve months, tax	$ (4,400,000)
Interest Rate Swap Agreements
Derivative [Line Items]
Number of derivative contracts | item	2
Average fixed interest rate (as a percent)	0.959%	0.754%
Interest Rate Swap Agreements | U.S. dollars
Derivative [Line Items]
Variable Rate Basis	LIBOR
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	$ (26,700,000)	$ (18,400,000)	$ 7,900,000
Designated as Hedging Instrument | Swaps maturing March 2016
Derivative [Line Items]
Notional amount	50,000,000
Designated as Hedging Instrument | Swaps maturing September 2016
Derivative [Line Items]
Notional amount	50,000,000
Designated as Hedging Instrument | Swaps maturing March 2017
Derivative [Line Items]
Notional amount	50,000,000
Designated as Hedging Instrument | Interest Rate Swap Agreements
Derivative [Line Items]
Floating rate obligation	75,000,000
Notional amount	150,000,000
Carrying value / fair value of derivative liabilities included in other liabilities	100,000	300,000
Carrying value / fair value of derivative assets included in other assets		100,000
Designated as Hedging Instrument | Foreign Currency Forward Exchange Contracts
Derivative [Line Items]
Notional amount	417,500,000	255,800,000
Carrying value / fair value of derivative liabilities included in other liabilities	22,100,000	12,700,000
Carrying value / fair value of derivative assets included in other assets	900,000	300,000
Designated as Hedging Instrument | Foreign Currency Forward Exchange Contracts | Cash Flow Hedging
Derivative [Line Items]
Recorded in gross margin	(18,400,000)	4,600,000	400,000
Not Designated as Hedging Instrument | Foreign Currency Forward Exchange Contracts
Derivative [Line Items]
Carrying value / fair value of derivative liabilities included in other liabilities	400,000	5,500,000
Carrying value / fair value of derivative assets included in other assets	400,000	800,000
Net gains (losses) on derivative contracts not designated as hedges	$ (14,900,000)	$ (16,300,000)	$ 7,600,000