Contingencies (Details) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2014 Huntsville Site [Member] USD ($)	Dec. 31, 2014 Groundwater Removal [Member] Norco Site [Member] USD ($)	Dec. 31, 2014 Investigation Report [Member] Huntsville Site [Member] USD ($)	Dec. 31, 2014 Tekelec Matter [Member] EUR (€)
Site Contingency [Line Items]
Litigation Settlement, Gross			$ 110,000
Settlement of legal matters	0	0	79,158
Settlement of legal matters, net of tax			48,623
Net of Tax, Per Share Related to Litigation Settlement Per Share Basic			$ 0.45
Net of Tax, Per Share Related to Litigation Settlement Per Share Diluted			$ 0.44
Recovery of Direct Costs	37,000
Environmental Remediation Expense To Date				4,000	47,000
Additional Expected Project Expenditures Low Estimate				3,000	16,490	500
Additional Expected Project Expenditures High Estimate				4,000	24,500	750
Loss Contingency, Range of Possible Loss, Maximum							11,333
Loss Contingency Damages Sought Value							3,742
Loss Contingency, Expenses Sought, Value							€ 312