PROPERTY AND EQUIPMENT (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
Computer and office equipment, including equipment acquired under capital leases	$ 23,024,000		$ 23,024,000		$ 19,961,000
Software capitalized for internal use	16,088,000		16,088,000		13,746,000
Vehicles, including equipment acquired under capital leases	2,170,000		2,170,000		2,056,000
Medical equipment	26,472,000		26,472,000		22,247,000
Work in progress	3,173,000		3,173,000		8,815,000
Furniture and fixtures	4,455,000		4,455,000		4,291,000
Leasehold improvements	13,164,000		13,164,000		12,082,000
Property, Plant and Equipment, Gross	88,546,000		88,546,000		83,198,000
Less: Accumulated depreciation	(48,685,000)		(48,685,000)		(42,016,000)
Property and equipment, net	39,861,000		39,861,000		41,182,000
Depreciation	3,958,000	2,527,000	7,794,000	4,945,000
Capitalized Computer Software, Amortization	$ 700,000	$ 400,000	$ 1,100,000	$ 700,000