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Restructuring Costs (Details) (USD $)	12 Months Ended
Restructuring Costs (Details) (USD $)	Dec. 31, 2014
Balance, January 1, 2014	$ 0us-gaap_RestructuringReserve
Charges for the year ended December 31, 2014	5,400,000us-gaap_RestructuringCharges
Amounts paid in the year ended December 31, 2014	(4,100,000)us-gaap_PaymentsForRestructuring
Balance, December 31, 2014	1,300,000us-gaap_RestructuringReserve
Employee And Contract Termination [Member]
Balance, January 1, 2014	0
Charges for the year ended December 31, 2014	1,300,000
Amounts paid in the year ended December 31, 2014	(1,300,000)
Balance, December 31, 2014	0
Proceed Trial Termination [Member]
Balance, January 1, 2014	0
Charges for the year ended December 31, 2014	4,100,000
Amounts paid in the year ended December 31, 2014	(2,800,000)
Balance, December 31, 2014	$ 1,300,000

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References+ Details