Other Post Retirement Benefits - Net Periodic Benefit Cost and Changes in Other Comprehensive Income (Details) (Domestic Other Postretirement Benefits [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Domestic Other Postretirement Benefits [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service Cost	$ 46	$ 16	$ 16
Interest Cost And Other	398	331	462
Net Periodic Benefit Cost	444	347	478
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net Loss Arising During The Period	514	(167)	747
Actuarial Loss Amortization	(116)	(75)	(62)
Total Recognized in Other Comprehensive Income (Loss)	398	(242)	685
Total Recognized In Net Periodic Benefit Cost And Other Comprehensive Loss Or Income	$ 842	$ 105	$ 1,163