SIGNIFICANT ACCOUNTING POLICIES (Details 6) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Outline of investment in equipment leased to third parties under operating lease
Program equipment	$ 297,264,000	$ 259,462,000
Accumulated depreciation	(182,803,000)	(154,690,000)
Total property, plant and equipment, net	114,461,000	104,772,000
Depreciation expense related to property, plant and equipment	29,200,000	26,200,000	17,300,000
Repairs and Maintenance
Repair and Maintenance	1,500,000	1,600,000	1,500,000
Furniture and fixtures
Property, Plant and Equipment
Estimated life (in years)	5
Machinery and equipment
Property, Plant and Equipment
Estimated life (in years)	5
Computers and software
Property, Plant and Equipment
Estimated life (in years)	5
Buildings
Property, Plant and Equipment
Minimum estimated life (in years)	10
Maximum estimated life (in years)	40
Assets under capital leases
Property, Plant and Equipment
Maximum estimated life (in years)	10
Leasehold improvements
Property, Plant and Equipment
Maximum estimated life (in years)	10
Equipment leased to third parties under operating leases
Property, Plant and Equipment
Maximum estimated life (in years)	10
Outline of investment in equipment leased to third parties under operating lease
Program equipment	34,827,000
Accumulated depreciation	(10,315,000)
Total property, plant and equipment, net	$ 24,512,000