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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2017
Income Tax Disclosure [Abstract] |
Schedule of Components of Income Taxes | The provision for income taxes consists of the following (in thousands):
|  | Year Ended December 31,
|  | 2017 |  | 2016 |  | 2015
Current: |  |  |  |  |  |
Federal |  | $ | 33,623 |  |  | $ | 38,103 |  |  | $ | 31,295 |
State |  | 7,717 |  |  | 6,685 |  |  | 5,837 |
Foreign |  | 2,725 |  |  | 2,672 |  |  | 2,048 |
|  | 44,065 |  |  | 47,460 |  |  | 39,180 |
Deferred: |  |  |  |  |  |  |  |
Federal and State |  | (4,726 | ) |  | 13,169 |  |  | 11,520 |
Foreign |  | (120 | ) |  | (426 | ) |  | (209 | )
|  | (4,846 | ) |  | 12,743 |  |  | 11,311 |
|  | $ | 39,219 |  |  | $ | 60,203 |  |  | $ | 50,491 |
Income (Loss) before Income Tax Provision | Income from continuing operations before income taxes consists of the following (in thousands):
|  | Year Ended December 31,
|  | 2017 |  | 2016 |  | 2015
United States |  | $ | 184,168 |  |  | $ | 148,402 |  |  | $ | 116,011 |
Foreign |  | 12,925 |  |  | 8,997 |  |  | 5,902 |
|  | $ | 197,093 |  |  | $ | 157,399 |  |  | $ | 121,913 |
Schedule of Deferred Tax Assets and Liabilities | The components of deferred tax assets (liabilities) are as follows (in thousands):
|  | December 31,
|  | 2017 |  | 2016
Intangibles |  | $ | (73,921 | ) |  | $ | (88,832 | )
Depreciation expense |  | (9,851 | ) |  | (14,383 | )
Allowance for doubtful accounts |  | 2,615 |  |  | 3,185 |
Employee-related accruals |  | 2,616 |  |  | 10,156 |
Stock-based compensation |  | 4,766 |  |  | 9,300 |
Other |  | 4,339 |  |  | 6,239 |
Net operating loss carryforwards |  | 1,255 |  |  | 1,262 |
Valuation allowance |  | (1,255 | ) |  | (1,209 | )
|  | $ | (69,436 | ) |  | $ | (74,282 | )
Schedule of Effective Income Tax Rate Reconciliation | The reconciliation between the amount computed by applying the U.S. federal statutory tax rate of 35.0 percent to income before income taxes and the income tax provision is as follows (in thousands):
|  | Year Ended December 31,
|  | 2017 |  | 2016 |  | 2015
Income tax provision at the statutory rate |  | $ | 68,983 |  |  | $ | 55,089 |  |  | $ | 42,669 |
State income taxes, net of federal benefit |  | 6,751 |  |  | 4,873 |  |  | 4,559 |
Disallowed meals and entertainment expenses |  | 1,854 |  |  | 1,814 |  |  | 1,718 |
Excess stock-based compensation benefit |  | (4,241 | ) |  | (165 | ) |  | (168 | )
Impact of TCJA |  | (31,420 | ) |  | — |  |  | — |
Other |  | (2,708 | ) |  | (1,408 | ) |  | 1,713 |
|  | $ | 39,219 |  |  | $ | 60,203 |  |  | $ | 50,491 |
Schedule of Unrecognized Tax Benefits Roll Forward | The following is a reconciliation of the total amounts of unrecognized tax benefits (in thousands):
|  | Year Ended December 31,
|  | 2017 |  | 2016 |  | 2015
Unrecognized tax benefit beginning of year |  | $ | 1,293 |  |  | $ | 814 |  |  | $ | 848 |
Gross increases - tax positions in current year |  | 71 |  |  | — |  |  | — |
Gross increases - tax positions in prior year |  | — |  |  | 479 |  |  | — |
Gross decreases - tax positions in prior year |  | (254 | ) |  | — |  |  | (34 | )
Lapse of the statute of limitations |  | (680 | ) |  | — |  |  | — |
Unrecognized tax benefit end of year |  | $ | 430 |  |  | $ | 1,293 |  |  | $ | 814 |

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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=84230637&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=84230637&loc=d3e32537-109319 + Details
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