Fair Value Measurements - Textuals (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain		$ 27.2	$ 0
Impairment of Long-Lived Assets to be Disposed of	1.1		1.1
Fairlawn Rehabilitation Hospital [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain		$ 27.2