PROPERTY AND EQUIPMENT (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
Computer and office equipment	$ 23,287,000		$ 23,287,000		$ 19,961,000
Software capitalized for internal use	16,686,000		16,686,000		13,746,000
Vehicles, including equipment acquired under capital leases	2,219,000		2,219,000		2,056,000
Medical equipment, including equipment acquired under capital leases	29,129,000		29,129,000		22,247,000
Work in progress	3,566,000		3,566,000		8,815,000
Furniture and fixtures	4,469,000		4,469,000		4,291,000
Leasehold improvements	13,215,000		13,215,000		12,082,000
Property, Plant and Equipment, Gross	92,571,000		92,571,000		83,198,000
Less: Accumulated depreciation	(52,522,000)		(52,522,000)		(42,016,000)
Property and equipment, net	40,049,000		40,049,000		41,182,000
Depreciation	4,205,000	3,225,000	11,999,000	8,169,000
Capitalized Computer Software, Amortization	$ 600,000	$ 400,000	$ 1,800,000	$ 1,000,000