Annual report pursuant to Section 13 and 15(d)

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

v3.8.0.1
Income Taxes - Components of Deferred Tax Asset (Liability) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Deferred tax assets:    
Net operating loss carryforwards $ 144,267 $ 157,811
Pension 16,255 21,454
Post retirement health 561 1,040
Transaction costs 1,183 2,896
Unrealized translation losses 5,065 6,046
Other 38,290 44,351
Valuation allowance (64,945) (38,271)
Deferred tax asset net of valuation 140,901 195,327
Deferred tax liabilities:    
Depreciation (86,532) (114,749)
Undistributed earnings of non-US subsidiaries (8,334) (73,205)
LIFO reserve 0 0
Inventory (11,324) (20,159)
Intangible assets (184,937) (276,671)
Natural gas contracts 0 (241)
Other accruals 0 (1,621)
Other (36,810) (27,144)
Deferred tax liability (327,937) (513,790)
Deferred Tax Liabilities, Net (187,036) (318,463)
Natural gas swaps    
Deferred tax assets:    
Derivative instrument 110 0
Interest rate swaps    
Deferred tax assets:    
Derivative instrument $ 115 $ 0