Discontinued Operations and Dispositions of Real Estate - HCR ManorCare, Inc. (Details) - USD ($)	1 Months Ended	3 Months Ended			6 Months Ended		12 Months Ended
	Dec. 31, 2015	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
DFL income		$ 13,564,000	$ 15,647,000		$ 27,276,000	$ 30,557,000
Maximum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Federal and state built-in gain tax from assets sold								$ 2,000,000,000
HCRMC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
DFL income						$ 116,000,000
DFL accretion							$ 0
Federal and state built-in gain tax from assets sold, term								10 years
Federal built-in gain tax from assets sold, federal term	5 years
State built-in gain from assets sold				$ 49,000,000