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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2011

Income Taxes [Abstract]

Schedule Of Income Tax Expense

		Years Ended December 31,
		2011				2010				2009
Current:
Federal		$	6,275			$	56,030			$	30,618
State			6,664				11,195				6,078
Foreign			1,347				894				649
			14,286				68,119				37,345
Deferred:
Federal			50,297				(8,523	)			5,605
State			7,566				(3,398	)			(697	)
			57,863				(11,921	)			4,908
Total income tax expense		$	72,149			$	56,198			$	42,253

Schedule Of Effective Income Tax Rate Reconciliation

		Years Ended December 31,
		2011				2010				2009
Tax at statutory rate		$	61,217			$	47,683			$	34,593
State income taxes, net of federal tax benefits			9,250				5,068				3,498
Non-deductible meals and entertainment			2,571				2,943				3,558
Income tax credits			(1,517	)			(525	)			(480	)
Other, net			628				1,029				1,084
Total income tax expense		$	72,149			$	56,198			$	42,253

Schedule Of Deferred Tax Assets And Liabilities

		December 31,
		2011				2010
Deferred tax assets:
Insurance and claims accruals		$	72,613			$	72,327
Allowance for uncollectible accounts			6,913				5,648
Other			8,382				7,087
Gross deferred tax assets			87,908				85,062
Deferred tax liabilities:
Property and equipment			295,429				238,416
Prepaid expenses			6,710				6,734
Other			2,964				2,590
Gross deferred tax liabilities			305,103				247,740
Net deferred tax liability		$	217,195			$	162,678

Schedule Of Income Tax Assets And Liabilities Financial Position

		December 31,
		2011				2010
Current deferred tax asset		$	25,805			$	27,829
Non-current deferred tax liability			243,000				190,507
Net deferred tax liability		$	217,195			$	162,678

Reconciliation Of Unrecognized Tax Benefits

		December 31,
		2011				2010
Unrecognized tax benefits, beginning balance		$	7,482			$	7,531
Gross increases – tax positions in prior period			2,184				268
Gross increases – current-period tax positions			1,219				311
Settlements			(58	)			(628	)
Unrecognized tax benefits, ending balance		$	10,827			$	7,482

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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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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.

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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.

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Tabular disclosure of tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities (i.e., uncertain tax positions) and other types of income tax contingencies, including: (1) the policy on classification of interest and penalties; (2) a tabular reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period; the total amount(s) of: (3) unrecognized tax benefits that, if recognized, would affect the effective tax rate, and (4) interest and penalties recognized in each of the income statement and balance sheet; (5) for positions for which it is reasonably possible that the total amounts unrecognized will significantly change within 12 months of the reporting date the: (i) nature of the uncertainty, (ii) nature of the event that could occur that would cause the change, and (iii) an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made; and (6) a description of tax years that remain subject to examination by major tax jurisdictions.

+ References

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-Publisher FASB

-Name FASB Interpretation (FIN)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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