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Subsequent Events (Details) (USD $)	0 Months Ended	12 Months Ended			0 Months Ended
Subsequent Events (Details) (USD $)	Apr. 02, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 24, 2015	Jan. 27, 2015
Subsequent Event [Line Items]
Proceeds from Sale of Property, Plant, and Equipment	$ 46,100,000	$ 4,100,000
Gain on sale or acquisition, net		1,209,000	3,017,000	0
Subsequent Event [Member]
Subsequent Event [Line Items]
Proceeds from Sale of Property, Plant, and Equipment						42,700,000
Gain on sale or acquisition, net						23,700,000
Severance Costs					$ 18,500,000

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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