Derivative Instruments and Hedging Activities (Narrative) (Details) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Derivative [Line Items]
Maturity period				10 months
Derivatives not designated as hedging instruments
Derivative [Line Items]
Total non-designated derivative realized loss (gain), net		$ 1,372,000	$ 272,000	$ (2,368,000)	$ 272,000
Derivatives not designated as hedging instruments | Commodity options
Derivative [Line Items]
Notional amount		5,670,000		5,670,000
Total non-designated derivative realized loss (gain), net		(74,000)	272,000	355,000	272,000
Derivatives not designated as hedging instruments | Foreign exchange forwards
Derivative [Line Items]
Notional amount		7,000,000		7,000,000
Total non-designated derivative realized loss (gain), net		94,000	0	94,000	0
Derivatives not designated as hedging instruments | Foreign exchange options
Derivative [Line Items]
Notional amount		48,100,000		48,100,000
Total non-designated derivative realized loss (gain), net	[1]	$ 1,352,000	$ 0	(2,817,000)	$ 0
Cash Flow Hedges | Derivatives not designated as hedging instruments | Foreign exchange options
Derivative [Line Items]
Total non-designated derivative realized loss (gain), net	[1]			$ 182,000

[1] Includes a loss of $182,000 for the discontinuation of cash flow hedges for which the forecasted transactions are not expected to occur within the originally forecasted time frame.