Derivatives (Currency Contracts) (Details) (Currency contracts [Member])	3 Months Ended
	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)	Mar. 31, 2015 Other Income (Expense) [Member] USD ($)	Mar. 31, 2014 Other Income (Expense) [Member] USD ($)	Mar. 31, 2015 Not Designated as Hedging Instrument [Member] CAD	Dec. 31, 2014 Not Designated as Hedging Instrument [Member] CAD
Derivative [Line Items]
Derivative, notional amount					5,100,000	6,300,000
Gain (loss) on derivatives not designated as hedging instruments	$ 74,000	$ 0	$ 74,000	$ 0