Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Schedule of Income (Loss) Before Income Taxes and Adjustment for Noncontrolling Interests

Components of the Company’s income before income taxes and adjustment for noncontrolling interests were as follows:

	Year Ended December 31,
	2017		2016		2015
Domestic	$	138,477	$	121,301	$	117,388
Foreign	74,623		73,459		35,600
	$	213,100	$	194,760	$	152,988

Schedule of Income Tax Expense (Benefit)

The Company’s income tax expense consists of the following:

	Year Ended December 31,
	2017			2016		2015
Current
Federal	$	40,607		$	22,109	$	26,240
State	500			1,063		1,218
Foreign	22,344			22,067		16,458
Deferred
Federal	17,594			1,828		6,410
State	419			904		281
Foreign	(6,937		)	6,350		(9,389		)
	$	74,527		$	54,321	$	41,218

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation of the U.S. statutory federal rate to the income tax provision was as follows:

	Year Ended December 31,
	2017			2016			2015
Tax at U.S. statutory rate	$	74,585		$	68,166		$	53,546
State and local taxes	1,177			2,564			3,441
Tax credits	(11,436		)	(10,348		)	(8,139		)
Changes in tax law, other	7,279			8,813			3,630
U.S. tax reform	33,493			—			—
Effect of foreign tax rates	(23,158		)	(19,600		)	(6,465		)
Nonrecurring permanent items	(13,947		)	—			(11,300		)
Capital loss	(19,931		)	—			—
Outside basis difference	9,562			—			—
Stock compensation (ASU 2016-09)	(3,563		)	(5,305		)	—
Other change in tax reserves	730			116			(368		)
Valuation allowance	25,761			9,112			11,638
Other, net	(6,025		)	803			(4,765		)
Income tax provision	$	74,527		$	54,321		$	41,218
Effective income tax rate	35.0		%	27.9		%	26.9		%

Deferred Tax Assets and Liabilities

Significant components of the Company’s deferred tax assets and liabilities as of December 31, 2017 and 2016 were as follows:

	2017			2016
Deferred tax assets:
Pension, postretirement and other benefits	$	57,700		$	78,194
Capitalized expenditures	1,471			1,001
Capital loss carryforward	13,780			—
Net operating loss and tax credit carryforwards	145,528			132,057
All other items	38,205			29,826
Total deferred tax assets	256,684			241,078
Deferred tax liabilities:
Property, plant and equipment	(21,507		)	(30,310		)
Intangibles	(9,665		)	(16,210		)
All other items	(11,834		)	(7,623		)
Total deferred tax liabilities	(43,006		)	(54,143		)
Valuation allowances	(189,355		)	(149,757		)
Net deferred tax assets	$	24,323		$	37,178

Reconciliation of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits was as follows:

	2017			2016
Balance at beginning of period	$	7,851		$	7,753
Tax positions related to the current period
Gross additions	720			516
Gross reductions	—			—
Tax positions related to prior years
Gross additions	92			31
Gross reductions	(223		)	(70		)
Settlements	(411		)	(379		)
Lapses on statutes of limitations	—			—
Balance at end of period	$	8,029		$	7,851