Consolidation of UK Operations (Details) (USD $)	6 Months Ended
	Jun. 30, 2011
Restructuring activities
Beginning Balance	$ 365,000
Charged to expenses	1,660,000
Amounts paid	(1,475,000)
Foreign currency translation	15,000
Ending Balance	565,000
One-time Termination Benefits [Member]
Restructuring activities
Beginning Balance	287,000
Charged to expenses	533,000
Amounts paid	(681,000)
Foreign currency translation	12,000
Ending Balance	151,000
Restructuring activities (Textuals) [Abstract]
Expenses related to consolidation recorded during period	500,000
One-time Site Closure Costs [Member]
Restructuring activities
Beginning Balance	78,000
Charged to expenses	1,127,000
Amounts paid	(794,000)
Foreign currency translation	3,000
Ending Balance	414,000
Restructuring activities (Textuals) [Abstract]
Expenses related to consolidation recorded during period	$ 1,100,000