XML 70 R49.htm IDEA: XBRL DOCUMENT v3.10.0.1
Unfavorable Contracts Liability - Additional Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Unfavorable Contracts Liability [Abstract]    
Percentage of retail rate charges to affiliates 60.00%  
Amortization into Wholesale revenues $ 6,457 $ 25,200
Unfavorable contracts liability 18,885 44,085
Unfavorable contracts liability, current 18,885 $ 25,200
Amortization into Affiliate revenue share $ 18,743