Annual report pursuant to Section 13 and 15(d)

Accumulated Other Comprehensive Income (Loss) - Change by Component (Details)

v3.8.0.1
Accumulated Other Comprehensive Income (Loss) - Change by Component (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax      
Beginning balance, value $ 1,027,944 $ 235,293 $ 217,824
Amounts reclassified from accumulated other comprehensive income 314 909  
Total other comprehensive income (loss) 56,910 (55,412) 648
Ending balance, value 1,631,919 1,027,944 235,293
Total      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax      
Beginning balance, value (53,711) 648 0
Other comprehensive income (loss) before reclassifications 57,708 (55,268)  
Amounts reclassified from accumulated other comprehensive income 314 909  
Total other comprehensive income (loss) 58,022 (54,359) 648
Ending balance, value 4,311 (53,711) 648
Defined benefit and other postretirement plans      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax      
Beginning balance, value 7,513 648  
Other comprehensive income (loss) before reclassifications (208) 6,844  
Amounts reclassified from accumulated other comprehensive income 107 21  
Total other comprehensive income (loss) (101) 6,865  
Ending balance, value 7,412 7,513 648
Net gain (loss) from hedging activities      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax      
Beginning balance, value 4,557 0  
Other comprehensive income (loss) before reclassifications (3,797) 3,669  
Amounts reclassified from accumulated other comprehensive income 207 888  
Total other comprehensive income (loss) (3,590) 4,557  
Ending balance, value 967 4,557 0
Foreign currency translation      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax      
Beginning balance, value (65,781) 0  
Other comprehensive income (loss) before reclassifications 61,713 (65,781)  
Amounts reclassified from accumulated other comprehensive income 0 0  
Total other comprehensive income (loss) 61,713 (65,781)  
Ending balance, value $ (4,068) $ (65,781) $ 0