Quarterly Financial Data (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Impairment of goodwill									$ 29,748	$ 0	$ 0
Restructuring Charges					2,000	6,000	3,000		3,667	5,071	1,575
Gain on the liquidation of a foreign subsidiary									0	(2,081)	0
Revenues	69,300	63,725	77,584	75,487	79,506	97,876	79,856	73,627	286,096	330,865	284,311
Gross Profit	20,700	17,648	26,651	23,040	24,793	27,983	23,760	20,229	88,039	96,765	87,214
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	(3,590)	(34,324)	2,422	(4,254)	(6,477)	(5,493)	612	(45)	(40,884)	(12,661)	(854)
Net Income (Loss) Attributable to Parent	(4,855)	(35,111)	1,307	(4,815)	(6,651)	5,461	190	(529)	(43,474)	(1,529)	(369)
Earnings Per Share, Basic	$ (0.18)	$ (1.28)	$ 0.05	$ (0.18)	$ (0.25)	$ 0.21	$ 0.01	$ (0.02)	$ (1.60)	$ (0.06)	$ (0.02)
Earnings Per Share, Diluted	$ (0.18)	$ (1.28)	$ 0.05	$ (0.18)	$ (0.25)	$ 0.19	$ 0.01	$ (0.02)	$ (1.60)	$ (0.06)	$ (0.02)
Income Tax Expense (Benefit)									2,590	(11,132)	(485)
Fair Value, Inputs, Level 3 [Member] | Re-Measurement of Liability [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings									$ (5,910)	$ 143