Derivatives (Gains and Losses for Derivatives that were Not Designated as Hedging Instruments) (Details)	12 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2013 Other Income (Expense) Currency Contracts USD ($)	Dec. 31, 2012 Other Income (Expense) Currency Contracts USD ($)	Dec. 31, 2011 Other Income (Expense) Currency Contracts USD ($)	Dec. 31, 2013 Not Designated as Hedging Instrument [Member] Currency Contracts CAD	Dec. 31, 2012 Not Designated as Hedging Instrument [Member] Currency Contracts CAD
Derivative [Line Items]
Derivative, notional amount							0	14,800,000
Gain and losses for derivatives not designated as hedging instruments	$ (41,000)	$ (24,000)	$ 257,000	$ (41,000)	$ (24,000)	$ 257,000