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NOTES PAYABLE AND AMENDED CREDIT AGREEMENT- Summary of Aggregate Annual Payments of Principal Required to Revolving Credit Facility (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Long Term Debt By Maturity [Abstract]    
During the twelve months ended June 30, 2019 $ 4,817  
During the twelve months ended June 30, 2020 607  
During the twelve months ended June 30, 2021 0  
During the twelve months ended June 30, 2022 56,000  
Payments/Long term debt, Total $ 61,424 $ 60,772