Other Comprehensive Income (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Reclassification Adjustment for Cash Flow Hedges
Interest expense	$ 11,657	$ 19,619	$ 16,728
Benefit from income taxes	(4,506)	(8,910)	(6,826)
Reclassification adjustment for cash flow hedge amounts included in net earnings, net of tax	7,151	10,709	9,902
Amortization of Pension and Postretirement Plan Actuarial Loss and Prior Service Cost
Cost of goods sold	9,458	4,783	1,418
Selling, administrative and general expenses	3,027	1,588	468
Benefit from income taxes	(4,775)	(2,781)	(748)
Amortization of pension and postretirement plan actuarial loss and prior service cost, net of tax	7,710	3,590	1,138
Total reclassifications from AOCI to earnings	$ 14,861	$ 14,299	$ 11,040