Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income - Change by Component (Details)

v3.10.0.1
Accumulated Other Comprehensive Income - Change by Component (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Beginning balance     $ 1,631,919 $ 1,027,944
Amounts reclassified from accumulated other comprehensive income $ 52 $ 34 145 (19)
Total other comprehensive income (loss) 5,504 18,529 (11,225) 56,943
Ending balance 1,662,473 1,080,970 1,662,473 1,080,970
Total        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Beginning balance     4,311 (53,711)
Other comprehensive income (loss) before reclassifications     (12,097) 56,708
Amounts reclassified from accumulated other comprehensive income     145 (19)
Total other comprehensive income (loss)     (11,952) 56,689
Ending balance (7,641) 2,978 (7,641) 2,978
Defined benefit and other postretirement plans        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Beginning balance     7,412 7,513
Other comprehensive income (loss) before reclassifications     1,360 (126)
Amounts reclassified from accumulated other comprehensive income (25) (32) (55) (97)
Total other comprehensive income (loss)     1,305 (223)
Ending balance 8,717 7,290 8,717 7,290
Net gain (loss) from hedging activities        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Beginning balance     967 4,557
Other comprehensive income (loss) before reclassifications     2,906 (3,404)
Amounts reclassified from accumulated other comprehensive income     200 78
Total other comprehensive income (loss)     3,106 (3,326)
Ending balance 4,073 1,231 4,073 1,231
Foreign currency translation        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Beginning balance     (4,068) (65,781)
Other comprehensive income (loss) before reclassifications     (16,363) 60,238
Amounts reclassified from accumulated other comprehensive income     0 0
Total other comprehensive income (loss)     (16,363) 60,238
Ending balance $ (20,431) $ (5,543) $ (20,431) $ (5,543)