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Restructuring (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Components of restructuring expenses and reserve
Accrued restructuring, beginning of period	$ 1,953us-gaap_RestructuringReserve
Employee severance, benefits and related costs	571us-gaap_SeveranceCosts1
Payments	(406)us-gaap_PaymentsForRestructuring
Accrued restructuring, end of period	$ 2,118us-gaap_RestructuringReserve

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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