Derivative Instruments And Hedging Activities - Derivative Instruments Designated as Hedging Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Asset derivatives designated as hedging instruments	$ 0	$ 413
Liability derivatives designated as hedging instruments	37,711	44,886
Other Assets, Net [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Asset derivatives designated as hedging instruments	0	413
Accrued Liabilities [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Liability derivatives designated as hedging instruments	1,648	1,473
Accrued Liabilities [Member] | Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Liability derivatives designated as hedging instruments	13,526	14,955
Other Noncurrent Liabilities [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Liability derivatives designated as hedging instruments	1,552	0
Other Noncurrent Liabilities [Member] | Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Liability derivatives designated as hedging instruments	$ 20,985	$ 28,458