Annual report pursuant to Section 13 and 15(d)

Income Taxes - Components of Deferred Tax Asset (Liability) (Details)

v3.10.0.1
Income Taxes - Components of Deferred Tax Asset (Liability) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Deferred tax assets:    
Net operating loss carryforwards $ 116,607 $ 144,267
Section 163j interest disallowance carryforward 13,387 0
Pension 16,397 16,255
Post retirement health 1,385 561
Transaction costs 708 1,183
Natural gas contracts and interest rate swaps 335 225
Unrealized translation losses 3,737 5,065
US research and development credits 1,173 0
Other 38,855 38,290
Valuation allowance (48,711) (64,945)
Deferred tax asset net of valuation 143,873 140,901
Deferred tax liabilities:    
Depreciation (92,911) (86,532)
Undistributed earnings of non-US subsidiaries (6,648) (8,334)
Inventory (10,432) (11,324)
Intangible assets (174,327) (184,937)
Natural gas contracts (4,654) 0
Other (32,230) (36,810)
Deferred tax liability (321,202) (327,937)
Deferred Tax Liabilities, Net $ (177,329) $ (187,036)