Discontinued Operations - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) Property	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Favorable (unfavorable) adjustments related to discontinued operations, pretax	$ 4.9	$ (2.5)	$ (9.2)
Favorable (unfavorable) adjustments related to discontinued operations, net of income tax	$ 3.0	$ (1.5)	$ (5.6)
Nursing Centers
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of discontinued operations held for sale | Property	2