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Business Developments and Other Significant Transactions (Narrative) (Details)						3 Months Ended				9 Months Ended
	Jun. 08, 2017 USD ($)	Nov. 01, 2016 USD ($) facility option bed	Oct. 01, 2016 USD ($) facility bed	May 31, 2016 USD ($)	Feb. 26, 2016 USD ($) bed	Sep. 30, 2017 USD ($) center bed	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) center bed	Sep. 30, 2016 USD ($)	Jul. 01, 2017 bed	Jun. 30, 2017 USD ($)	Aug. 15, 2016 facility
Business Acquisition [Line Items]
Number of licensed nursing beds						8,457				8,457
Cash termination payment \| $						$ 13,791,000		$ 6,865,000		$ 41,297,000	$ 20,971,000
Number of nursing centers \| center						76				76
Property acquisitions \| $										$ 8,750,000	7,550,000
Gain on sale of investment in unconsolidated affiliate \| $										733,000	$ 0
Avon Ohio, LLC
Business Acquisition [Line Items]
Lease termination costs \| $									$ 2,008,000
Lease termination fees, future annual payment amounts \| $				$ 300,000
Selma Nursing Centers
Business Acquisition [Line Items]
Number of licensed nursing beds												103
Purchase price \| $	$ 8,750,000
Buildings acquired \| $	7,332,000
Land acquired \| $	715,000
Furniture, fixtures and equipment acquired \| $	$ 703,000
Golden Living
Business Acquisition [Line Items]
Number of nursing centers \| facility														22
Broadmoor Manor
Business Acquisition [Line Items]
Number of licensed nursing beds			120
Term of contract			10 years
Rent expense, base year rent \| $			$ 540,000
Rent expense, increase during year two \| $			$ 780,000
Annual rent increase, percentage			2.00%
Leake County Nursing Home
Business Acquisition [Line Items]
Number of licensed nursing beds			99
Term of contract			2 years
Rent expense, base year rent \| $			$ 300,000
Armory, MS \| Golden Living
Business Acquisition [Line Items]
Number of licensed nursing beds			152
Batesville, MS \| Golden Living
Business Acquisition [Line Items]
Number of licensed nursing beds			130
Brook Manor, MS \| Golden Living
Business Acquisition [Line Items]
Number of licensed nursing beds			58
Eupora, MS \| Golden Living
Business Acquisition [Line Items]
Number of licensed nursing beds			119
Ripley, MS \| Golden Living
Business Acquisition [Line Items]
Number of licensed nursing beds			140
Southaven, MS \| Golden Living
Business Acquisition [Line Items]
Number of licensed nursing beds			140
Eason Blvd \| Golden Living
Business Acquisition [Line Items]
Number of licensed nursing beds			120
Tylertown, MS \| Golden Living
Business Acquisition [Line Items]
Number of licensed nursing beds			60
Term of contract			10 years
Arab, AL \| Golden Living
Business Acquisition [Line Items]
Number of licensed nursing beds		87
Meadowood, AL \| Golden Living
Business Acquisition [Line Items]
Number of licensed nursing beds		180
Riverchase, AL \| Golden Living
Business Acquisition [Line Items]
Number of licensed nursing beds		132
Boaz, AL \| Golden Living
Business Acquisition [Line Items]
Number of licensed nursing beds		100
Foley, AL \| Golden Living
Business Acquisition [Line Items]
Number of licensed nursing beds		154
Hueytown, AL \| Golden Living
Business Acquisition [Line Items]
Number of licensed nursing beds		50
Lanett, MS \| Golden Living
Business Acquisition [Line Items]
Number of licensed nursing beds		85
Montgomery, AL \| Golden Living
Business Acquisition [Line Items]
Number of licensed nursing beds		138
Oneonta, AL \| Golden Living
Business Acquisition [Line Items]
Number of licensed nursing beds		120
Oxford, AL \| Golden Living
Business Acquisition [Line Items]
Number of licensed nursing beds		173
Pell City, AL \| Golden Living
Business Acquisition [Line Items]
Number of licensed nursing beds		94
Winfield, AL \| Golden Living
Business Acquisition [Line Items]
Number of licensed nursing beds		123
Unnamed pharmacy joint venture
Business Acquisition [Line Items]
Gain on sale of investment in unconsolidated affiliate \| $							$ 1,366,000			733,000
Property subject to operating lease \| Golden Living
Business Acquisition [Line Items]
Number of center locations \| facility		12	8
Amended lease \| Golden Living
Business Acquisition [Line Items]
Term of contract		10 years
Rent expense, base year rent \| $		$ 24,675,000
Annual rent increase, percentage		2.00%
Maximum number of lease renewal periods \| option		2
Operating leases, renewal term		5 years
Trend Health and Rehab of Carthage, LLC (Trend Health)
Business Acquisition [Line Items]
Cash termination payment \| $						$ 250,000				$ 250,000
Diversicare of Hutchinson \| Hutchinson, Kansas
Business Acquisition [Line Items]
Number of licensed nursing beds					85
Property acquisitions \| $					$ 4,250,000
Clinton Place \| Clinton, Kentucky
Business Acquisition [Line Items]
Number of licensed nursing beds					88
Property acquisitions \| $					$ 3,300,000
Mortgage term loan \| Amended and restated credit agreement \| Mortgage loan \| Selma Nursing Centers
Business Acquisition [Line Items]
Increase to credit facility limit \| $													$ 7,500,000