Derivative and Hedging Activities Derivative and Hedging Activities (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Derivative [Line Items]
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	$ 12,000	$ 196,000
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	7,000	195,000
Foreign Currency Cash Flow Hedge Asset at Fair Value	329,000	0
Foreign Currency Cash Flow Hedge Liability at Fair Value	0	0
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	0
Other Comprehensive Income (Loss) [Member]
Derivative [Line Items]
Accumulated OCI Gain on Cash Flow Hedges to be Reclassified to Earnings	311,000
Forward Contracts [Member]
Derivative [Line Items]
Derivative, Term of Contract	12 months
Not Designated as Hedging Instrument [Member] | Forward Contracts [Member]
Derivative [Line Items]
Derivative, Term of Contract	3 months
Not Designated as Hedging Instrument [Member] | Forward Contracts [Member] | Accrued liabilities [Member]
Derivative [Line Items]
Foreign Currency Cash Flow Hedge Liability at Fair Value	0	0
Designated as Hedging Instrument [Member] | Forward Contracts [Member]
Derivative [Line Items]
Derivative, Term of Contract	12 months
Designated as Hedging Instrument [Member] | Forward Contracts [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivative [Line Items]
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	12,000	196,000
Foreign Currency Cash Flow Hedge Asset at Fair Value	329,000	0
Designated as Hedging Instrument [Member] | Forward Contracts [Member] | Accrued liabilities [Member]
Derivative [Line Items]
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	$ 7,000	$ 195,000