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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Income before Income Tax, Domestic and Foreign [Table Text Block]

Income before income taxes includes the following components:

		Year Ended December 31
		2018				2017				2016
		(thousands)
Domestic		$	21,704			$	115,083			$	41,703
Foreign		398				2,505				1,598
Income before income taxes		$	22,102			$	117,588			$	43,301

Income Tax Provision (Benefit) [Table Text Block]

The income tax provision shown in the Consolidated Statements of Operations includes the following:

		Year Ended December 31
		2018				2017				2016
		(thousands)
Current income tax provision (benefit)
Federal		$	6,459			$	22,541			$	10,664
State		3,126				3,973				2,201
Foreign		5				—				5
Total current		9,590				26,514				12,870
Deferred income tax provision (benefit)
Federal		(5,987		)		6,747				2,549
State		(2,127		)		991				(1,536		)
Foreign		149				379				(8,836		)
Total deferred		(7,965		)		8,117				(7,823		)
Income tax provision		$	1,625			$	34,631			$	5,047

Income Tax Rate Reconciliation [Table Text Block]

The effective tax rate varies from the U.S. Federal statutory income tax rate principally due to the following:

		Year Ended December 31
		2018				2017				2016
		(thousands, except percentages)
Income before income taxes		$	22,102			$	117,588			$	43,301
Statutory U.S. income tax rate		21.0		%		35.0		%		35.0		%
Statutory tax provision		$	4,642			$	41,156			$	15,155
State taxes		741				3,719				1,370
Domestic production activities deduction		—				(963		)		(165		)
Unrecognized tax benefits		(181		)		(86		)		1,717
Benefit from enactment of the Tax Act		(3,806		)		(8,129		)		—
Change in valuation allowance (a)		—				—				(9,884		)
Tax credits		(272		)		(912		)		(2,904		)
Foreign rate differential		432				(366		)		(91		)
Share-based compensation		(1,718		)		(413		)		107
Nondeductible executive compensation		366				—				—
Meals and entertainment		886				663				601
Other		535				(38		)		(859		)
Total		$	1,625			$	34,631			$	5,047
Effective income tax rate		7.4		%		29.5		%		11.7		%

______________________________________ 

(a) Deferred tax assets in our foreign subsidiaries are primarily the result of net operating losses. As of each reporting date, management considers new evidence, both positive and negative, that could affect its view of the future realization of deferred tax assets. During fourth quarter 2016, because we achieved three years of cumulative pretax income in the Canadian tax jurisdiction and due to the implementation of a tax-planning strategy, management determined that there is sufficient positive evidence to conclude that it is more likely than not that the deferred tax assets are realizable and therefore released the valuation allowance in the amount of $9.9 million.

Net Deferred Tax Assets and Liabilities [Table Text Block]

The components of our net deferred tax assets and liabilities at December 31, 2018 and 2017, are summarized as follows:

		December 31, 2018				December 31, 2017
		(thousands)
Deferred tax assets
Employee benefits		$	27,149			$	30,853
Capital leases		5,742				1,079
Inventories		2,649				4,598
Foreign net operating loss carryforward		3,108				5,137
Other		6,461				4,924
Net deferred tax assets		$	45,109			$	46,591
Deferred tax liabilities
Property and equipment		$	(48,302	)		$	(47,946	)
Intangible assets and other		(5,369		)		(4,168		)
Other		(2,445		)		(1,867		)
Deferred tax liabilities		$	(56,116	)		$	(53,981	)
Total deferred tax liabilities, net		$	(11,007	)		$	(7,390	)

Unrecognized Tax Benefits Roll Forward [Table Text Block]

The following table summarizes the changes related to our gross unrecognized tax benefits excluding interest and penalties:

		2018				2017				2016
		(thousands)
Balance as of January 1		$	2,083			$	2,224			$	878
Increases related to prior years' tax positions		13				1				1,657
Increases related to current year tax positions		—				51				104
Decreases related to prior years' tax positions		(43		)		(12		)		—
Lapse of statute of limitations		(203		)		(181		)		—
Settlements		—				—				(415		)
Balance as of December 31		$	1,850			$	2,083			$	2,224

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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