Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

The Company’s income tax provision consists of the following (in millions):

	Year Ended December 31,
	2016			2015			2014
Current:
Federal	$	21.4		$	19.4		$	22.0
State	3.1			3.2			3.1
Total current tax provision	24.5			22.6			25.1
Deferred:
Federal	6.7			7.8			(0.6		)
State	0.8			1.1			(0.5		)
Foreign	(0.7		)	(0.1		)	(0.3		)
Total deferred tax provision (benefit)	6.8			8.8			(1.4		)
Total income tax provision	$	31.3		$	31.4		$	23.7

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation of the statutory federal income tax rate to the Company’s effective income tax rate and income tax provision is as follows (in millions):

	Year Ended December 31,
	2016					2015					2014
Federal income tax provision at the statutory rate	$	29.9		35.0	%	$	29.0		35.0	%	$	23.2		35.0	%
Increase (decrease) resulting from:
State income taxes, net of federal benefit	2.9			3.4		2.9			3.5		2.3			3.5
Decrease in unrecognized tax benefits (inclusive of
related interest and penalty)	(0.3		)	(0.4	)	—			—		(0.9		)	(1.4	)
Effect of foreign operations	(0.7		)	(0.8	)	(0.1		)	(0.1	)	(0.3		)	(0.5	)
Change in valuation allowance	—			—		(0.1		)	(0.1	)	—			—
Tax credits and other, net	(0.5		)	(0.6	)	(0.3		)	(0.4	)	(0.6		)	(0.9	)
Income tax provision	$	31.3		36.6	%	$	31.4		37.9	%	$	23.7		35.7	%

Schedule of Deferred Tax Assets and Liabilities

The tax effects of significant temporary differences which comprise deferred tax assets and liabilities are as follows (in millions):

	December 31, 2016			December 31, 2015
Deferred tax assets:
Employee benefits, including post-retirement benefits	$	15.4		$	15.2
Trade and other receivables	2.9			4.1
Goodwill and intangibles	0.2			2.0
Self-insurance reserves	1.7			1.5
Other	6.1			4.0
Subtotal	26.3			26.8
Less: valuation allowance	—			—
Net deferred tax assets	$	26.3		$	26.8
Deferred tax liabilities:
Inventories	$	7.0		$	9.0
Property and equipment	36.2			27.2
Goodwill and intangibles	5.6			6.0
Other	1.8			1.6
Total deferred tax liabilities	$	50.6		$	43.8
Total net deferred tax liabilities	$	(24.3	)	$	(17.0	)
Net current deferred tax assets	4.6			1.6
Net non-current deferred tax liabilities	$	(28.9	)	$	(18.6	)

Schedule of Unrecognized Tax Benefits Roll Forward

A reconciliation of the beginning and ending amounts of unrecognized tax benefits for 2016, 2015 and 2014 is as follows (in millions):

	Year Ended December 31,
	2016			2015		2014
Balance at beginning of year	$	0.4		$	0.4	$	0.6
Lapse of statute of limitations	(0.2		)	—		(0.2		)
Balance at end of year	$	0.2		$	0.4	$	0.4