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Property Plant and Equipment (Details Textual) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Property, Plant and Equipment (Textuals) [Abstract]
Equipment leased or held for use, Gross	$ 18.7	$ 19.9
Accumulated Depreciation, equipment leased or held for use	17.9	19.0
Assets under joint revenue sharing arrangements included in Theater system components	75.8	62.8
Accumulated Depreciation , Assets under joint revenue sharing arrangements included in Theater system components	15.1	12.0
Assets under joint revenue sharing arrangements included in Assets under construction	10.9	6.2
Assets under capital lease included in Office and production equipment	1.3	1.5
Accumulated Depreciation, Assets under capital lease included in Office and production equipment	$ 1.3	$ 1.4

Property, plant, or equipment held under lease agreements classified as an asset.

The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

The amount of accumulated depreciation, by major property class, recorded on property subject to or available for lease as of the balance sheet date.

The gross amount of lessor property subject to or available for lease as of the balance sheet date.