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RECENT ACCOUNTING PRONOUNCEMENTS - Additional Information (Details)
$ in Thousands
Sep. 30, 2018
USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Undiscounted future lease liabilities $ 33,670
Pro Forma | ASU 2016-02  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Undiscounted future lease liabilities 33,700
Right of use asset $ 33,700