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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2016
Income Tax Disclosure [Abstract] |
Reconciliation of Effective Tax Rate to Federal Statutory Tax Rate | The following is a reconciliation of our effective tax rate to the federal statutory tax rate:
| Years Ended December 31, |  |
| 2016 |  |  | 2015 |  |  | 2014 |  |
U.S. federal statutory rate |  | 35.0 |  | % |  | 35.0 |  | % |  | 35.0 |  | %
State taxes, net of federal benefit |  | 2.6 |  |  | 2.4 |  |  | 2.9 |  |
State incentives |  | (0.2 | ) |  | (0.5) |  |  |  | (0.8 | ) |
State law changes |  | 0.3 |  |  | (0.9) |  |  |  | (0.9 | ) |
Nondeductible expenses |  | 0.7 |  |  | 0.4 |  |  |  | 0.9 |  |
Other |  | - |  |  | - |  |  |  | (0.1 | ) |
Net effective rate |  | 38.4 |  | % |  | 36.4 |  | % |  | 37.0 |  | %
Summary of Provision for Income Taxes | The following is a summary of our provision for income taxes (in thousands):
| Years Ended December 31, |
| 2016 |  |  | 2015 |  |  | 2014 |
Current |  |  |  |  |  |  |  |  |  |  |
Federal | $ | 30,324 |  |  | $ | 21,363 |  |  | $ | 5,939 |
State and local |  | 3,296 |  |  |  | 2,900 |  |  |  | 445 |
Foreign |  | 108 |  |  |  | 284 |  |  |  | 249 |
|  | 33,728 |  |  |  | 24,547 |  |  |  | 6,633 |
Deferred |  |  |  |  |  |  |  |  |  |  |
Federal |  | 11,981 |  |  |  | 16,538 |  |  |  | 23,600 |
State and local |  | 971 |  |  |  | (346 | ) |  |  | 191 |
Foreign |  | (64 | ) |  |  | (106 | ) |  |  | (115 | )
|  | 12,888 |  |  |  | 16,086 |  |  |  | 23,676 |
Total provision | $ | 46,616 |  |  | $ | 40,633 |  |  | $ | 30,309 |
Summary of Deferred Tax Assets and Liabilities Presented as Noncurrent | In the following summary of our deferred tax assets and liabilities (in thousands), however, we are presenting all the deferred tax asset and liability balances as of both December 31, 2016 and December 31, 2015 as noncurrent for better year over year comparability:
| December 31, |
| 2016 |  |  | 2015 |
Accrued compensation |  | 20,651 |  |  |  | 18,448 |
Other reserves |  | 8,580 |  |  |  | 4,319 |
Tax credit carryforwards |  | 1,694 |  |  |  | 1,257 |
Operating loss carryforwards |  | 1,399 |  |  |  | 1,914 |
Total gross deferred income taxes |  | 32,324 |  |  |  | 25,938 |
Valuation allowances |  | (456 | ) |  |  | (108 | )
Total deferred tax assets |  | 31,868 |  |  |  | 25,830 |
Prepaids |  | (3,401 | ) |  |  | (3,448 | )
Other receivables |  | (3,051 | ) |  |  | (4,493 | )
Property and equipment |  | (105,905 | ) |  |  | (87,148 | )
Goodwill |  | (84,170 | ) |  |  | (82,511 | )
Total deferred tax liabilities |  | (196,527 | ) |  |  | (177,600 | )
Total deferred taxes | $ | (164,659 | ) |  | $ | (151,770 | )
Unrecognized Tax Benefits | A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands):
| 2016 |  |  | 2015 |
Gross unrecognized tax benefits - beginning of the year | $ | 1,139 |  |  | $ | 1,065 |
Gross increases related to prior year tax positions |  | 394 |  |  |  | 166 |
Gross increases related to current year tax positions |  | 488 |  |  |  | 153 |
Lapse of applicable statute of limitations |  | (189 | ) |  |  | (245 | )
Gross unrecognized tax benefits - end of year | $ | 1,832 |  |  | $ | 1,139 |

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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=65882285&loc=d3e32639-109319 + Details
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