PROPERTY AND EQUIPMENT (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Property, Plant and Equipment [Abstract]
Computer and office equipment, including equipment acquired under capital leases	$ 15,500,000		$ 15,500,000		$ 14,443,000
Software capitalized for internal use	10,308,000		10,308,000		9,939,000
Vehicles, including equipment acquired under capital leases	1,603,000		1,603,000		1,540,000
Medical equipment	19,066,000		19,066,000		16,466,000
Work in progress	9,585,000		9,585,000		4,315,000
Furniture and fixtures	3,784,000		3,784,000		3,219,000
Leasehold improvements	9,866,000		9,866,000		7,164,000
Property, Plant and Equipment, Gross	69,712,000		69,712,000		57,086,000
Less: Accumulated depreciation	(37,792,000)		(37,792,000)		(33,365,000)
Property and equipment, net	31,920,000		31,920,000		23,721,000
Depreciation	(2,570,000)	(2,050,000)	(5,029,000)	(3,981,000)
Capitalized Computer Software, Amortization	$ 300,000	$ 500,000	$ 700,000	$ 1,200,000