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Property and Equipment (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Property Plant and Equipment (Textual) [Abstract]
Depreciation expense, inclusive of expense captured in cost of revenue	$ 3.0	$ 2.4	$ 8.4	$ 6.9

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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