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Restructuring - Narrative (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended	12 Months Ended
	May 31, 2013 employee	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Restructuring and Related Activities [Abstract]
Number of positions eliminated	55
Restructuring		$ 876	$ 876	$ 0	$ 0

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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