Other Comprehensive Income (OCI) (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Reclassification Adjustment for Cash Flow Hedges
Interest expense	$ 1,585	$ 6,658	$ 3,140	$ 8,632
Benefit from income taxes	(630)	(2,655)	(1,247)	(3,179)
Total	955	4,003	1,893	5,453
Amortization of Pension and Postretirement Plan Actuarial Loss and Prior Service Cost
Cost of goods sold	4,039	2,454	7,974	4,697
Selling, administrative and general expenses	1,030	761	2,164	1,545
Benefit from income taxes	(1,985)	(1,274)	(3,970)	(2,084)
Total	3,084	1,941	6,168	4,158
Total reclassifications from AOCI to earnings	$ 4,039	$ 5,944	$ 8,061	$ 9,611