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Discontinued Operations (Details)	0 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended
Discontinued Operations (Details)	Jul. 02, 2011 International operations in United Kingdom EUR (€)	Jun. 30, 2011 International operations in United Kingdom USD ($)	Dec. 31, 2011 International operations in United Kingdom USD ($)	Mar. 31, 2011 International operations in Germany and the Netherlands USD ($)	Dec. 31, 2010 International operations in Germany and the Netherlands USD ($)
Discontinued operations
Sale of operation	€ 1
Charge to adjust assets and liabilities to net realizable value		2,200,000	2,200,000
Charges in connection with closure of operations				1,400,000	1,500,000
Gross assets prior to charge taken		4,300,000
Gross liabilities prior to charge taken		$ 2,100,000

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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