ACQUISITIONS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Accelerated Care Plus Corp. (ACP)
Acquired intangible assets
Contingent consideration paid on acquisitions prior to adoption of new authoritative guidance	$ 0.1	$ 0.4
Contingent consideration paid after adoption of new authoritative guidance	0.4	0.1
Estimated payments related to contingent consideration provisions of acquisitions in future periods	6.6
O & P companies
Acquired intangible assets
Number of O&P companies acquired (in entities)	1	1
Number of patient-care centers operated by acquiree	2	1
Aggregate purchase price of O&P businesses	2.0	5.8
Goodwill recorded, related to acquisitions	1.3	3.6
Promissory notes as a part of purchase price		0.7
Contingent consideration payable reported as other liabilities		$ 0.6
Maximum term for payment of contingent consideration (in years)		2