Segment Information (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Statements of Operations Data:
(Loss) income from continuing operations	$ (7,055)	$ 4,988	$ (10,276)
Provision for foreign income taxes	(1,750)	(3,171)	(2,499)
Depreciation and amortization	(5,696)	(5,476)	(4,562)
Interest expense, net	(24,579)	(24,010)	(24,598)
Pension curtailment expense	1,325
Other expenses, net	381	764	2,087
Adjusted EBITDA	27,032	38,859	23,859
Sciens Management LLC
Statements of Operations Data:
Sciens Management fees and expenses	$ 356	$ 450	$ 389