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ACQUISITIONS - Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Sep. 09, 2016
Dec. 31, 2015
Dec. 31, 2014
Business Acquisition [Line Items]        
Goodwill $ 365,947   $ 308,729 $ 573,323
Home Solutions        
Business Acquisition [Line Items]        
Accounts receivable   $ 11,956    
Inventories   3,199    
Prepaids and other assets   852    
Total current assets   16,007    
Property and equipment   4,651    
Goodwill   57,218    
Other long-term assets   891    
Total assets   110,867    
Accounts payable   14,576    
Accrued liabilities   3,136    
Total liabilities   17,712    
Net assets acquired   93,155    
Home Solutions | Managed care contracts        
Business Acquisition [Line Items]        
Intangible assets   24,700    
Home Solutions | Licenses        
Business Acquisition [Line Items]        
Intangible assets   5,400    
Home Solutions | Trade name        
Business Acquisition [Line Items]        
Intangible assets   1,800    
Home Solutions | Non-compete agreements        
Business Acquisition [Line Items]        
Intangible assets   $ 200