Other Assets - Narrative (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Other Assets [Abstract]
Loss Contingency, Settlement Agreement, Terms	Previously, an inactive subsidiary of the Company executed separate settlement and release agreements with two of its insurance carriers for $35,000, of which $26,398 remains. Part of the agreements were payable in four annual installments of $5,000, the final of which was received in the first quarter of 2010. The proceeds of both settlements are restricted and can only be used to pay claims and costs of defense associated with the subsidiary’s asbestos litigation.
Interest Earned, Restricted Cash	$ 69	$ 80
Payments Made, Restricted Cash	$ (1,391)	$ (1,840)	$ (1,640)