Business Developments and Other Significant Transactions (Narrative) (Details) | Jun. 08, 2017USD ($) | Nov. 01, 2016USD ($)facilityoptionbed | Oct. 01, 2016USD ($)facilitybed | May 31, 2016USD ($) | Feb. 26, 2016USD ($)bed | Sep. 30, 2017USD ($)centerbed | Dec. 31, 2016USD ($) | Sep. 30, 2016USD ($) | Jun. 30, 2016USD ($) | Sep. 30, 2017USD ($)centerbed | Sep. 30, 2016USD ($) | Jul. 01, 2017bed | Jun. 30, 2017USD ($) | Aug. 15, 2016facility |
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 | |