PROPERTY AND EQUIPMENT (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Property, Plant and Equipment [Abstract]
Computer and office equipment, including equipment acquired under capital leases	$ 14,976,000		$ 14,443,000
Depreciation	2,459,000	1,931,000
Capitalized Computer Software, Amortization	400,000	700,000
Software capitalized for internal use	9,939,000		9,939,000
Vehicles, including equipment acquired under capital leases	1,630,000		1,540,000
Medical equipment	17,627,000		16,466,000
Work in progress	7,178,000		4,315,000
Furniture and fixtures	3,539,000		3,219,000
Leasehold improvements	8,383,000		7,164,000
Property, Plant and Equipment, Gross	63,272,000		57,086,000
Less: Accumulated depreciation	(35,505,000)		(33,365,000)
Property and equipment, net	$ 27,767,000		$ 23,721,000