Derivative Financial Instruments and Hedging Activities (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Aug. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Derivative, basis spread on variable rate	1.625%
Derivative, average variable interest rate	2.35%
Designated as Hedging Instrument | Cash Flow Hedging
Derivative [Line Items]
AOCI gain (loss) balance expected to be reclassified in next twelve months		$ (1,600)
Foreign Currency Exchange and Option Contracts, Scale 1
Derivative [Line Items]
Maximum foreign currency cash flow hedge, period (in months)		3 months
Foreign currency option contracts
Derivative [Line Items]
Notional amount	$ 332,000
Foreign currency option contracts | Designated as Hedging Instrument | Cash Flow Hedging
Derivative [Line Items]
Notional amount		$ 107,200	$ 79,400
Interest rate swaps
Derivative [Line Items]
Notional amount	$ 170,000
Derivative, term of contract (in years)	9 years
Derivative, basis spread on variable rate	1.625%
Derivative, average variable interest rate	2.20%
Interest rate swaps | Not Designated as Hedging Instrument
Derivative [Line Items]
Notional amount		$ 130,169	161,968
Percentage of JV variable debt hedged by long-term interest rate derivatives		81.00%
Interest rate swaps | Designated as Hedging Instrument | Cash Flow Hedging
Derivative [Line Items]
Notional amount		$ 350,000	$ 0
Forward Interest Rate Swap
Derivative [Line Items]
Notional amount	$ 180,000
Derivative, term of contract (in years)	9 years
Minimum
Derivative [Line Items]
Foreign currency exposure hedged for forecasted sales in next three months, percent		50.00%
Foreign currency exposure hedged for forecasted sales In next three to twelve months, percent		50.00%
Foreign currency exposure hedged for forecasted sales in next 12 to 18 months, percent		50.00%
Minimum | Foreign Currency Exchange and Option Contracts, Scale 2
Derivative [Line Items]
Foreign currency cash flow hedge, period (in months)		3 months
Minimum | Foreign Currency Exchange and Option Contracts, Scale 3
Derivative [Line Items]
Foreign currency cash flow hedge, period (in months)		12 months
Maximum
Derivative [Line Items]
Foreign currency exposure hedged for forecasted sales in next three months, percent		90.00%
Foreign currency exposure hedged for forecasted sales In next three to twelve months, percent		75.00%
Maximum | Foreign Currency Exchange and Option Contracts, Scale 2
Derivative [Line Items]
Foreign currency cash flow hedge, period (in months)		12 months
Maximum | Foreign Currency Exchange and Option Contracts, Scale 3
Derivative [Line Items]
Foreign currency cash flow hedge, period (in months)		18 months