PROPERTY AND EQUIPMENT (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Property, Plant and Equipment [Abstract]
Computer and office equipment, including equipment acquired under capital leases	$ 18,858,000		$ 18,858,000		$ 14,443,000
Software capitalized for internal use	11,255,000		11,255,000		9,939,000
Vehicles, including equipment acquired under capital leases	2,032,000		2,032,000		1,540,000
Medical equipment	22,352,000		22,352,000		16,466,000
Work in progress	11,623,000		11,623,000		4,315,000
Furniture and fixtures	4,255,000		4,255,000		3,219,000
Leasehold improvements	11,503,000		11,503,000		7,164,000
Property, Plant and Equipment, Gross	81,878,000		81,878,000		57,086,000
Less: Accumulated depreciation	(40,828,000)		(40,828,000)		(33,365,000)
Property and equipment, net	41,050,000		41,050,000		23,721,000
Depreciation	3,269,000	2,134,000	8,298,000	6,115,000
Capitalized Computer Software, Amortization	$ 400,000	$ 400,000	$ 1,000,000	$ 1,000,000