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Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Jun. 30, 2011
Commitments and Contingencies [Abstract]
Commitments and Contingencies	20. Commitments and Contingencies From time to time, the Company is involved in various legal proceedings arising from the ordinary course of its business operations, such as personal injury claims, employment matters, landlord-tenant disputes, patent claims and contractual disputes, some of which are covered by insurance. The Company believes its potential liability with respect to proceedings currently pending is not material, individually or in the aggregate, to the Company’s financial position, results of operations and cash flows.