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INTANGIBLE ASSETS, NET - Amortization of Tradename, Referral Relationships and Non-Competition Agreements (Details)
$ in Thousands
Mar. 31, 2018
USD ($)
Referral Relationships [Member]  
Finite Lived Intangible Assets [Line Items]  
2018 $ 2,068
2019 1,965
2020 1,965
2021 1,965
2022 1,917
2023 1,809
Thereafter 5,358
Non-compete Agreements [Member]  
Finite Lived Intangible Assets [Line Items]  
2018 766
2019 693
2020 481
2021 403
2022 143
2023 $ 3