Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Schedule of components of provision for income taxes

	Year Ended December 31
	2015		2014		2013
Current
Federal	$	5,967	$	6,200	$	6,180
State and local	577		1,587		1,739
Foreign	6,597		6,138		8,632

	13,141		13,925		16,551

Deferred
Federal	5,471		7,506		5,950
State and local	563		488		(248		)
Foreign	748		1,219		(767		)

	6,782		9,213		4,935

Provision for income taxes	$	19,923	$	23,138	$	21,486

Schedule of differences between U.S. federal statutory tax rate and effective income tax rate

	Year Ended December 31
	2015		2014		2013
U.S. federal statutory rate	35.0	%	35.0	%	35.0	%
State income taxes, net of federal income tax benefit	1.8		2.2		0.8
Tax rate differential on foreign income	(3.1	)	(2.9	)	(1.5	)
Nonrecurring adjustments related to sale of foreign subsidiary	—		—		(2.2	)
Permanent tax differences	(1.6	)	0.3		(1.4	)
Valuation allowance	0.3		—		1.5
Settlement of uncertain tax positions	—		(1.9	)	—
Tax statute expiration	(0.6	)	(0.6	)	(0.6	)
Change in uncertain tax positions	0.1		0.1		0.3
Other — net	(0.5	)	(0.3	)	0.1

Effective income tax rate	31.4	%	31.9	%	32.0	%

Schedule of gross operating loss carryforwards and tax credit carryforwards

Type	Amount		Expiration Date
Foreign tax credits	$	183	2017
Capital loss carryforwards	2,014		2018
State tax credits(1)	2,232		2023 - 2027
Operating loss carryforwards — federal	549		2029
Operating loss carryforwards — state(2)	11,716		2018 - 2034
Operating loss carryforwards — foreign(3)	8,582		2023 - unlimited

(1) Of the total state tax credit carryforwards, approximately 47% begin to expire in 2023.

(2) Of the total state operating loss-carryforwards, approximately 97% expire in 2020 or later.

(3) Of the total foreign tax operating loss carryforwards, approximately 95% have no expiration.

Schedule of components of deferred taxes

	December 31
	2015			2014
Deferred tax assets
Net operating loss and credit carryforwards (1) (2)	$	4,875		$	5,736
Accruals	11,159			10,524
Inventories	15,403			12,856
Pensions	11,303			10,670
Valuation allowance	(2,682		)	(2,576		)

Total deferred tax assets	40,058			37,210

Deferred tax liabilities
Property, plant and equipment	$	49,272		$	39,708
Goodwill and other intangible assets	6,108			6,039
U.S. liability on Belgian and German net deferred tax assets	708			829

Total deferred tax liabilities	56,088			46,576

Net deferred tax liability(3)	$	(16,030	)	$	(9,366	)

(1)Uncertain tax liabilities of approximately $0.2 million and $0.3 million partially offset the net operating losses and credit carryforwards in 2015 and 2014, respectively.

(2)Net indirect benefits on uncertain tax liabilities of approximately $61 thousand and $74 thousand are included in the U.S. net operating loss and credit carryforwards in 2015 and 2014, respectively.

(3)A current deferred tax liability of $0.2 million is included in accounts payable and accrued liabilities within the consolidated balance sheets as of December 31, 2014.

Schedule of reconciliation of unrecognized income tax benefits

	Year Ended December 31
	2015			2014			2013
Balance as of January 1	$	1,187		$	3,435		$	4,141
Gross decreases for tax positions of prior years	—			—			(438		)
Gross increases for tax positions of current year	78			75			122
Lapse of statute of limitations	(417		)	(500		)	(390		)
Settlement of uncertain tax positions	(70		)	(1,823		)	—

Balance as of December 31	$	778		$	1,187		$	3,435

Summary of tax years that remain subject to examination for major jurisdictions

Jurisdiction		Years
United States		2012 — 2015
Kentucky		2011 — 2015
Pennsylvania		2012 — 2015
Belgium		2012 — 2015
China		2012 — 2015
Germany		2011 — 2015
United Kingdom		2012 — 2015
Japan		2010 — 2015
Singapore		2011 — 2015