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Restructuring Charges (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Roll-forward of the accrued restructuring expense
Restructuring charge	$ 539
Severance [Member]
Roll-forward of the accrued restructuring expense
Accrued at January 1, 2013
Restructuring charge	437
Payments	(206)
Accrued at March 31, 2013	$ 231

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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- Definition

Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

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