Exit Activities - Additional Information (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012 Person
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, completion date	Sep. 30, 2012
Restructurings and exit activities, expected reduction in headcount	119
Restructurings and exit activities, expected annualized net savings	$ 4.0
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructurings and exit activities, costs incurred	0.8
Facility Closing [Member] | Cost of net revenues
Restructuring Cost and Reserve [Line Items]
Restructurings and exit activities, costs incurred	0.5
Facility Closing [Member] | Operating expenses
Restructuring Cost and Reserve [Line Items]
Restructurings and exit activities, costs incurred	$ 0.3