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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Taxes

Schedule of components of the provision for income taxes

		2012			2011			2010
Current provision (benefit)
Federal		$	27,524		$	24,791		$	18,491
State		7,125			5,697			4,663
Foreign		67			621			1,081
		$	34,716		$	31,109		$	24,235
Deferred provision (benefit)
Federal		(451		)	6,488			(1,951		)
State		(366		)	849			(189		)
Foreign		(62		)	(122		)	(36		)
		(879		)	7,215			(2,176		)
Change in valuation allowance		—			(150		)	—
Total		$	33,837		$	38,174		$	22,059

Schedule of reconciliation of income tax expense compared to the amount of income tax expense that would result by applying U.S. federal statutory income tax rate to pre-tax income

		2012		2011		2010
U.S. federal statutory income tax rate		35.00	%	35.00	%	35.00	%
State taxes, net of federal income tax impact		4.87	%	4.33	%	4.52	%
Foreign tax credit		(0.01	)%	(0.52	)%	(1.88	)%
Canadian income tax		0.01	%	0.52	%	1.88	%
Domestic production activities deduction		(2.97	)%	(2.79	)%	(3.30	)%
Other items		0.45	%	2.92	%	3.40	%
Effective tax rate on income before provision for income taxes excluding income attributable to noncontrolling interests		37.35	%	39.46	%	39.62	%
Impact of income from noncontrolling interests on effective tax rate		(0.61	)%	—		—
Effective tax rate on income before provision for income taxes and noncontrolling interests		36.74	%	39.46	%	39.62	%

Schedule of tax effect of temporary differences that give rise to deferred income taxes

		2012			2011
Deferred tax assets:
Accrued workers compensation		$	4,973		$	4,023
Insurance reserves		1,114			2,657
Other accrued liabilities		10,434			6,604
State income taxes		1,537			1,605
Capital loss carryforward		344			344
Foreign tax credit		662			644
Valuation allowance		(344		)	(344		)
Total deferred tax assets		18,720			15,533
Deferred tax liabilities
Depreciation and amortization		(26,661		)	(24,659		)
Prepaid expenses and other		(1,600		)	(1,294		)
Total deferred tax liabilities		(28,261		)	(25,953		)
Total		$	(9,541	)	$	(10,420	)

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 9

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319

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