Derivatives And Risk Management Derivatives and Risk Management (Foreign Currency Exchange Contracts) (Details) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 Caontracts	Dec. 31, 2013 Caontracts	Dec. 31, 2014 Foreign Currency Exchange Contracts [Member] United States of America, Dollars USD ($)	Dec. 31, 2013 Foreign Currency Exchange Contracts [Member] United States of America, Dollars USD ($)	Dec. 31, 2014 Foreign Currency Exchange Contracts [Member] Canada, Dollars CAD	Dec. 31, 2013 Foreign Currency Exchange Contracts [Member] Canada, Dollars CAD
Schedule of Foreign Currency Derivative Contracts Outstanding [Line Items]
Number Of Days Canadian Currency Prices Are Settled With U.S. Dollars	60 days
Number of Foreign Currency Derivatives Held	18	23
Derivative, Notional Amount			$ 5,474	$ 8,631	6,198	9,191