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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2012
Income Tax Disclosure [Abstract] |
Schedule Of Income Tax Expense | Income tax expense consisted of the following (in thousands):
| Years Ended December 31,
| 2012 |  | 2011 |  | 2010
Current: |  |  |  |  |
Federal | $ | 69,590 |  |  | $ | 6,275 |  |  | $ | 56,030 |
State | 10,088 |  |  | 6,664 |  |  | 11,195 |
Foreign | (478 | ) |  | 1,347 |  |  | 894 |
| 79,200 |  |  | 14,286 |  |  | 68,119 |
Deferred: |  |  |  |  |
Federal | (8,630 | ) |  | 50,297 |  |  | (8,523 | )
State | (438 | ) |  | 7,566 |  |  | (3,398 | )
| (9,068 | ) |  | 57,863 |  |  | (11,921 | )
Total income tax expense | $ | 70,132 |  |  | $ | 72,149 |  |  | $ | 56,198 |
Schedule of Effective Income Tax Rate Reconciliation | The effective income tax rate differs from the federal corporate tax rate of 35% in 2012, 2011 and 2010 as follows (in thousands):
| Years Ended December 31,
| 2012 |  | 2011 |  | 2010
Tax at statutory rate | $ | 60,608 |  |  | $ | 61,217 |  |  | $ | 47,683 |
State income taxes, net of federal tax benefits | 6,273 |  |  | 9,250 |  |  | 5,068 |
Non-deductible meals and entertainment | 2,686 |  |  | 2,571 |  |  | 2,943 |
Income tax credits | (758 | ) |  | (1,517 | ) |  | (525 | )
Other, net | 1,323 |  |  | 628 |  |  | 1,029 |
Total income tax expense | $ | 70,132 |  |  | $ | 72,149 |  |  | $ | 56,198 |
Schedule Of Deferred Tax Assets And Liabilities | At December 31, deferred tax assets and liabilities consisted of the following (in thousands):
| December 31,
| 2012 |  | 2011
Deferred tax assets: |  |  |
Insurance and claims accruals | $ | 73,211 |  |  | $ | 72,613 |
Allowance for uncollectible accounts | 7,813 |  |  | 6,913 |
Other | 9,416 |  |  | 8,382 |
Gross deferred tax assets | 90,440 |  |  | 87,908 |
Deferred tax liabilities: |  |  |
Property and equipment | 288,032 |  |  | 295,429 |
Prepaid expenses | 6,774 |  |  | 6,710 |
Other | 3,026 |  |  | 2,964 |
Gross deferred tax liabilities | 297,832 |  |  | 305,103 |
Net deferred tax liability | $ | 207,392 |  |  | $ | 217,195 |
Schedule Of Income Tax Assets And Liabilities Financial Position | These amounts are presented in the accompanying Consolidated Balance Sheets as of December 31 as follows (in thousands):
| December 31,
| 2012 |  | 2011
Current deferred tax asset | $ | 25,139 |  |  | $ | 25,805 |
Non-current deferred tax liability | 232,531 |  |  | 243,000 |
Net deferred tax liability | $ | 207,392 |  |  | $ | 217,195 |
Reconciliation Of Unrecognized Tax Benefits | The reconciliations of beginning and ending gross balances of unrecognized tax benefits for 2012 and 2011 are shown below (in thousands).
| December 31,
| 2012 |  | 2011
Unrecognized tax benefits, beginning balance | $ | 10,827 |  |  | $ | 7,482 |
Gross increases – tax positions in prior period | 279 |  |  | 2,184 |
Gross increases – current-period tax positions | 788 |  |  | 1,219 |
Settlements | (331 | ) |  | (58 | )
Unrecognized tax benefits, ending balance | $ | 11,563 |  |  | $ | 10,827 |

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- Definition 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 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition 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 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition 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 + Details
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- Definition 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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -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. + Details
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