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Reorganization (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Summary of roll forward of the activity in the reorganization accrual
Additions	$ 1,591	$ 1,343
Workforce Reduction [Member]
Summary of roll forward of the activity in the reorganization accrual
Accrual Beginning Balance	14
Additions	1,591
Cash payments	(459)
Accrual Ending Balance	$ 1,146

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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