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Commitments, Contingencies and Other Matters (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Restructuring and other charges
Restructuring expense	$ 531	$ 63
Personnel severance and related costs
Restructuring and other charges
Restructuring expense	435	63
Number of employees impacted	20
Other associated costs
Restructuring and other charges
Restructuring expense	$ 96

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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