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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2018
Income Tax Disclosure [Abstract] |
Schedule of Income before Income Tax From Continuing Operations | For the years ended December 31, 2018, 2017 and 2016, our income tax provision was calculated based on income from continuing operations before income taxes as follows: (in thousands):
| 2018 |  | 2017 |  | 2016
United States | $ | 375,408 |  |  | $ | 303,854 |  |  | $ | 283,904 |
Foreign | 19,620 |  |  | 14,895 |  |  | 12,590 |
| $ | 395,028 |  |  | $ | 318,749 |  |  | $ | 296,494 |
Schedule of Income Tax Provision | The income tax provision in the accompanying Consolidated Statements of Operations for the years ended December 31, 2018, 2017 and 2016 consisted of the following (in thousands):
| 2018 |  | 2017 |  | 2016
Current: |  |  |  |  |
Federal provision | $ | 75,405 |  |  | $ | 120,317 |  |  | $ | 95,171 |
State and local provisions | 28,063 |  |  | 23,496 |  |  | 23,387 |
Foreign provision | 1,389 |  |  | 244 |  |  | 749 |
| 104,857 |  |  | 144,057 |  |  | 119,307 |
Deferred | 4,249 |  |  | (53,358 | ) |  | (8,108 | )
| $ | 109,106 |  |  | $ | 90,699 |  |  | $ | 111,199 |
Schedule of U.S. Statutory Income Tax Rates From Continuing Operations | Items accounting for the differences between income taxes computed at the federal statutory rate and the income tax provision for the years ended December 31, 2018, 2017 and 2016 were as follows (in thousands):
| 2018 |  | 2017 |  | 2016
Federal income taxes at the statutory rate | $ | 82,946 |  |  | $ | 111,562 |  |  | $ | 103,773 |
State and local income taxes, net of federal tax benefits | 21,827 |  |  | 15,736 |  |  | 14,801 |
State tax reserves | (7 | ) |  | (2,543 | ) |  | 74 |
Permanent differences | 6,584 |  |  | 4,916 |  |  | 3,698 |
Domestic manufacturing deduction | — |  |  | (10,387 | ) |  | (6,830 | )
Excess tax benefit from share-based compensation | (1,227 | ) |  | (1,341 | ) |  | (2,114 | )
Goodwill impairment | — |  |  | 17,055 |  |  | — |
Foreign income taxes (including UK statutory rate changes) | 70 |  |  | (2,586 | ) |  | (1,290 | )
Impact of federal rate change on net deferred tax liabilities | — |  |  | (39,343 | ) |  | — |
Federal tax reserves | (67 | ) |  | (1,247 | ) |  | (893 | )
Other | (1,020 | ) |  | (1,123 | ) |  | (20 | )
| $ | 109,106 |  |  | $ | 90,699 |  |  | $ | 111,199 |
Reconciliation of Unrecognized Income Tax Benefits | A reconciliation of unrecognized income tax benefits at the beginning and at the end of the year is as follows (in thousands):
| 2018 |  | 2017
Balance at beginning of year | $ | 841 |  |  | $ | 3,982 |
Additions based on tax positions related to the current year | — |  |  | 1,158 |
Additions based on tax positions related to prior years | — |  |  | 1,244 |
Adjustments for tax positions of prior years | 184 |  |  | (5,543 | )
Reductions for expired statute of limitations | (1,025 | ) |  | — |
Balance at end of year | $ | — |  |  | $ | 841 |
Schedule of Deferred Tax Assets and Liabilities | The deferred income tax assets and deferred income tax liabilities recorded for the years ended December 31, 2018 and 2017 were as follows (in thousands):
| 2018 |  | 2017
Deferred income tax assets: |  |  |
Excess of amounts expensed for financial statement purposes over amounts deducted for income tax purposes: |  |  |
Insurance liabilities | $ | 44,192 |  |  | $ | 42,425 |
Pension liability | 3,204 |  |  | 6,900 |
Deferred compensation | 29,300 |  |  | 27,742 |
Other (including liabilities and reserves) | 27,400 |  |  | 28,534 |
Total deferred income tax assets | 104,096 |  |  | 105,601 |
Valuation allowance for deferred tax assets | (3,855 | ) |  | (3,825 | )
Net deferred income tax assets | 100,241 |  |  | 101,776 |
Deferred income tax liabilities: |  |  |
Costs capitalized for financial statement purposes and deducted for income tax purposes: |  |  |
Goodwill and identifiable intangible assets | (152,761 | ) |  | (150,900 | )
Depreciation of property, plant and equipment | (14,904 | ) |  | (11,781 | )
Other | (3,424 | ) |  | (3,792 | )
Total deferred income tax liabilities | (171,089 | ) |  | (166,473 | )
Net deferred income tax liabilities | $ | (70,848 | ) |  | $ | (64,697 | )

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