Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3)

v3.19.3
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Summary of Significant Accounting Policy [Line Items]    
Other long-term liabilities $ 34,556 $ 36,222
Other Long-Term Liabilities [Member]    
Summary of Significant Accounting Policy [Line Items]    
Other long-term liabilities 4  
Unearned Revenue [Member]    
Summary of Significant Accounting Policy [Line Items]    
Other long-term liabilities 10,500 10,000
Trade Discount [Member]    
Summary of Significant Accounting Policy [Line Items]    
Other long-term liabilities $ 24,052 $ 26,222