Accumulated Other Comprehensive Income Details 1 (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Interest Expense	$ 5,666	$ 5,400
Cost of Goods Sold	181,198	172,589
Income Tax Expense (Benefit)	18,333	16,592
Net Income (Loss) Attributable to Parent	58,051	52,544	306,094
Net Unrealized Gain (Loss) on Cash Flow Hedging Arrangements, Net Of Tax [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Interest Expense	768	755
Cost of Goods Sold	(41)	475
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	727	1,230
Income Tax Expense (Benefit)	287	388
Net Income (Loss) Attributable to Parent	440	842
Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax, Portion Attributable to Parent	712	2,572
Income Tax Expense (Benefit)	316	907
Net Income (Loss) Attributable to Parent	$ (396)	$ (1,665)