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SUBSEQUENT EVENTS (Narrative) (Detail)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Jan. 02, 2019
$ / shares
Dec. 31, 2018
USD ($)
facility
$ / shares
Dec. 31, 2017
USD ($)
facility
$ / shares
Dec. 31, 2018
USD ($)
facility
$ / shares
Dec. 31, 2017
USD ($)
facility
$ / shares
Dec. 31, 2016
facility
Sep. 30, 2018
facility
Apr. 01, 2015
$ / shares
Subsequent Event [Line Items]                
Share price   $ 0.10 $ 0.10 $ 0.10 $ 0.10     $ 0.10
Direct financing lease                
Number of facilities sold | facility   14 32 78 52 38    
Accounts receivable | $   $ 347,377 $ 279,334 $ 347,377 $ 279,334      
Orianna                
Direct financing lease                
Number of facilities transitioned | facility             22  
MedEquities                
Subsequent Event [Line Items]                
Expected consideration for business combination | $   $ 600,000   $ 600,000        
Subsequent event | MedEquities                
Subsequent Event [Line Items]                
Business combination acquirees' stockholders conversion ratio of acquirer's stock received 0.235              
Business combination acquirees stockholder's additional cash amount per share received $ 2.00              
Special cash dividend (per share) $ 0.21