Derivative Instruments, Hedging Activities and Fair Value (Details) (USD $)				6 Months Ended
	Dec. 31, 2013	Jun. 30, 2014 Derivatives Designated as Hedging Instruments	Dec. 31, 2013 Derivatives Designated as Hedging Instruments	Jun. 30, 2014 Derivatives Designated as Hedging Instruments Minimum	Jun. 30, 2014 Derivatives Designated as Hedging Instruments Maximum	Jun. 30, 2014 Derivatives Designated as Hedging Instruments Foreign currency forward exchange contracts Other current assets	Dec. 31, 2013 Derivatives Designated as Hedging Instruments Foreign currency forward exchange contracts Other current assets	Jun. 30, 2014 Derivatives Designated as Hedging Instruments Foreign currency forward exchange contracts Other current liabilities	Dec. 31, 2013 Derivatives Designated as Hedging Instruments Foreign currency forward exchange contracts Other current liabilities	Jun. 30, 2014 Derivatives Designated as Hedging Instruments Cross currency interest rate swaps Other assets	Dec. 31, 2013 Derivatives Designated as Hedging Instruments Cross currency interest rate swaps Other assets	Jun. 30, 2014 Derivatives Designated as Hedging Instruments Cross currency interest rate swaps Noncurrent liabilities	Dec. 31, 2013 Derivatives Designated as Hedging Instruments Cross currency interest rate swaps Noncurrent liabilities	Jun. 30, 2014 Derivatives Not Designated as Hedging Instruments Foreign currency forward exchange contracts Other current assets	Dec. 31, 2013 Derivatives Not Designated as Hedging Instruments Foreign currency forward exchange contracts Other current assets	Jun. 30, 2014 Derivatives Not Designated as Hedging Instruments Foreign currency forward exchange contracts Other current liabilities	Dec. 31, 2013 Derivatives Not Designated as Hedging Instruments Foreign currency forward exchange contracts Other current liabilities
Derivative contracts
Period over which gains and losses are reclassified to earnings				10 years	15 years
Derivatives subject to enforceable master netting arrangements, net liability	$ (100,000)
Asset Derivatives		24,514,000	26,041,000			41,000	40,000			24,473,000	26,001,000			2,300,000	1,216,000
Liability Derivatives		$ 19,975,000	$ 13,427,000					$ 36,000	$ 17,000			$ 19,939,000	$ 13,410,000			$ 1,460,000	$ 3,267,000