Equipment and Improvements	9 Months Ended
Equipment and Improvements	Sep. 30, 2013
Property Plant And Equipment [Abstract]
Equipment and Improvements	10. Equipment and Improvements Equipment and improvements are stated at cost. Depreciation is computed using the straight-line method based on the estimated useful lives of the assets, generally ranging from three to seven years. Leasehold improvements are amortized using the straight-line method over the shorter of the estimated useful life of the asset or the lease term. During the period ended September 30, 2013, we wrote off $1.0 million of the net book value of equipment and improvements, primarily leasehold improvements, associated with our Restructuring Plan (see Note 15).

The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures.

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