Annual report pursuant to Section 13 and 15(d)

Accumulated Other Comprehensive Income (Loss) - Reclassifications out of AOCI (Details)

v3.8.0.1
Accumulated Other Comprehensive Income (Loss) - Reclassifications out of AOCI (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Reclassification, net                 $ 314 $ 909  
Interest expense                 179,044 140,315 $ 44,348
Cost of goods sold                 1,095,265 810,085 278,791
Income (loss) before income taxes and noncontrolling interest                 60,634 69,117 (11,427)
Tax (expense) benefit                 (119,197) 10,041 0
Net loss $ (65,564) $ 3,016 $ 1,670 $ 2,315 $ (10,527) $ 9,606 $ 76,948 $ 3,131 (58,563) 79,158 $ (11,427)
Defined benefit and other postretirement plans                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Reclassification, before tax                 132 26  
Reclassification, tax                 (25) (5)  
Reclassification, net                 107 21  
Amortization of prior service cost                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Reclassification, before tax                 78 0  
Amortization of net gain (loss)                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Reclassification, before tax                 54 26  
Net gain (loss) from hedging activities | Reclassification out of Accumulated Other Comprehensive Income                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Income (loss) before income taxes and noncontrolling interest                 262 1,433  
Tax (expense) benefit                 (55) (545)  
Net loss                 207 888  
Net gain (loss) from hedging activities | Reclassification out of Accumulated Other Comprehensive Income | Interest rate caps                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Interest expense                 40 0  
Net gain (loss) from hedging activities | Reclassification out of Accumulated Other Comprehensive Income | Natural gas swaps                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Cost of goods sold                 $ 222 $ 1,433