SIGNIFICANT ACCOUNTING POLICIES (Details 4) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Outline of investment in equipment leased to third parties under operating lease
Program equipment	$ 302,021,000	$ 297,264,000
Less: Accumulated depreciation	(175,223,000)	(182,803,000)
Total property, plant and equipment, net	126,798,000	114,461,000
Depreciation expense related to property, plant and equipment	30,800,000	29,200,000	26,200,000
Furniture and fixtures
Property, Plant and Equipment
Estimated life	5 years
Machinery and equipment
Property, Plant and Equipment
Estimated life	5 years
Computers and software
Property, Plant and Equipment
Estimated life	5 years
Buildings
Outline of investment in equipment leased to third parties under operating lease
Asset under capital lease	10,900,000	4,400,000
Accumulated depreciation on capital leases asset	900,000	400,000
Annual future minimum lease payments under capital leases
2014	1,600,000
2015	1,600,000
2016	1,600,000
2017	1,700,000
2018	1,700,000
Thereafter	6,200,000
Interest included in future minimum lease payments	4,300,000
Buildings | Minimum
Property, Plant and Equipment
Estimated life	10 years
Buildings | Maximum
Property, Plant and Equipment
Estimated life	40 years
Assets under capital leases | Maximum
Property, Plant and Equipment
Estimated life	10 years
Leasehold improvements | Maximum
Property, Plant and Equipment
Estimated life	10 years
Equipment leased to third parties under operating leases
Outline of investment in equipment leased to third parties under operating lease
Program equipment	34,142,000
Less: Accumulated depreciation	(14,184,000)
Total property, plant and equipment, net	$ 19,958,000
Equipment leased to third parties under operating leases | Maximum
Property, Plant and Equipment
Estimated life	10 years