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INTANGIBLE ASSETS, NET (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Finite Lived Intangible Assets [Line Items]    
Total $ 43,213 $ 38,060
Tradenames [Member]    
Finite Lived Intangible Assets [Line Items]    
Total $ 23,678 21,234
Estimated useful life 6 years  
Referral Relationships [Member]    
Finite Lived Intangible Assets [Line Items]    
Total $ 16,721 14,859
Accumulated amortization $ 5,733 5,275
Referral Relationships [Member] | Minimum [Member]    
Finite Lived Intangible Assets [Line Items]    
Estimated useful life 6 years  
Referral Relationships [Member] | Maximum [Member]    
Finite Lived Intangible Assets [Line Items]    
Estimated useful life 16 years  
Non-compete Agreements [Member]    
Finite Lived Intangible Assets [Line Items]    
Total $ 2,814 1,967
Accumulated amortization $ 3,575 $ 3,380
Non-compete Agreements [Member] | Minimum [Member]    
Finite Lived Intangible Assets [Line Items]    
Estimated useful life 5 years  
Non-compete Agreements [Member] | Maximum [Member]    
Finite Lived Intangible Assets [Line Items]    
Estimated useful life 6 years