Derivatives And Risk Management Derivatives and Risk Management (Foreign Currency Exchange Contracts) (Details) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Foreign Exchange Contract [Member] United States of America, Dollars USD ($)	Dec. 31, 2012 Foreign Exchange Contract [Member] United States of America, Dollars USD ($)	Sep. 30, 2013 Foreign Exchange Contract [Member] Canada, Dollars CAD	Dec. 31, 2012 Foreign Exchange Contract [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	14	20
Derivative, Notional Amount			$ 1,852	$ 12,621	1,929	12,502