XML 81 R60.htm IDEA: XBRL DOCUMENT v3.10.0.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Concentration of Credit Risk) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Concentration Risk [Line Items]      
Purchase interest step-up $ 306,231 $ 325,405  
Customer Concentration Risk [Member] | Revenues [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage 0.00% 0.00% 0.00%
Customer Concentration Risk [Member] | Accounts Receivables [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage 0.00% 0.00%