Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities - Effects on Statements of Income (Loss) and Consolidated Statements of Comprehensive Loss (Details)

v3.19.2
Derivative Instruments and Hedging Activities - Effects on Statements of Income (Loss) and Consolidated Statements of Comprehensive Loss (Details) - Other expenses, net - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Designated | Interest rate swap instruments        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of (Gain) Loss Recognized in Net Income $ (1) $ (31) $ (50) $ (133)
Not Designated | Interest rate swap instruments        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of (Gain) Loss Recognized in Net Income 69 (61) 69 (73)
Not Designated | Commodity swap contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of (Gain) Loss Recognized in Net Income (172) 45 (172) 45
Not Designated | Interest make-whole provisions        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of (Gain) Loss Recognized in Net Income $ (62) $ 0 $ (785) $ 0