Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Accumulated Other Comprehensive Income - Reclassifications out of AOCI (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Reclassification, net $ 102 $ (4) $ 93 $ (53)
Interest expense, net 27,221 48,176 56,384 94,961
Cost of goods sold 326,309 281,853 614,385 532,072
Income (loss) before income taxes and noncontrolling interest (29,808) (1,337) (29,835) 3,888
Tax expense (benefit) 13,649 3,007 13,120 97
Net loss (16,159) 1,670 (16,715) 3,985
Defined benefit and other postretirement plans        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Reclassification, before tax (19) (39) (36) (77)
Reclassification, tax 3 6 6 11
Reclassification, net (16) (33) (30) (66)
Amortization of prior service credit        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Reclassification, before tax (20) (20) (39) (39)
Amortization of net (gain) loss        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Reclassification, before tax 1 (19) 3 (38)
Net gain (loss) from hedging activities | Amount of gain (loss) reclassified from AOCI into income        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Income (loss) before income taxes and noncontrolling interest 157 37 164 21
Tax expense (benefit) (39) (8) (41) (8)
Net loss 118 29 123 13
Net gain (loss) from hedging activities | Amount of gain (loss) reclassified from AOCI into income | Interest rate caps        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Interest expense, net 58 9 93 11
Net gain (loss) from hedging activities | Amount of gain (loss) reclassified from AOCI into income | Natural gas swaps        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Cost of goods sold $ 99 $ 28 $ 71 $ 10