Derivative Instruments And Hedging Activities (Gain (Loss) Reclassified From Accumulated OCI Into Income) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Earnings (Effective Portion)	$ (3,365)	$ (1,476)	$ 2,661
Oil And Gas Commodity Contracts [Member] | Income From Discontinued Operations Net Of Tax [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Earnings (Effective Portion)			3,184
Interest Rate Swaps [Member] | Net Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Earnings (Effective Portion)	(858)	(152)	(523)
Foreign Exchange Contracts [Member] | Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Earnings (Effective Portion)	$ (2,507)	$ (1,324)