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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2020
Income Tax Disclosure [Abstract] |
Provision for income taxes | The provision for income taxes from continuing operations consisted of the following:
|  | For the years ended December 31,
(in thousands) |  | 2020 |  | 2019 |  | 2018
Current: |  |  |  |  |  |
Federal |  | $ | (13,235) |  |  | $ | 6,653 |  |  | $ | 3,865 |
State and local |  | 2,478 |  |  | 2,235 |  |  | 2,331 |
Foreign |  | 107 |  |  | (6) |  |  | 1 |
Total current income tax provision (benefit) |  | (10,650) |  |  | 8,882 |  |  | 6,197 |
Deferred: |  |  |  |  |  |
Federal |  | 57,755 |  |  | (6,346) |  |  | 15,588 |
State and local |  | 8,902 |  |  | 206 |  |  | 1,000 |
Foreign |  | (551) |  |  | 175 |  |  | (4) |
Total deferred income tax provision (benefit) |  | 66,106 |  |  | (5,965) |  |  | 16,584 |
Provision for income taxes |  | $ | 55,456 |  |  | $ | 2,917 |  |  | $ | 22,781 |
Effective income tax rate reconciliation | The difference between the statutory rate for federal income tax and the effective income tax rate was as follows:
|  | For the years ended December 31,
|  | 2020 |  | 2019 |  | 2018
Statutory rate |  | 21.0 | % |  | 21.0 | % |  | 21.0 | %
Effect of: |  |  |  |  |  |
State and local income taxes, net of federal tax benefit |  | 4.5 |  |  | 212.7 |  |  | 3.7 |
Excess tax benefits from stock-based compensation |  | 0.5 |  |  | (60.4) |  |  | 0.7 |
Nondeductible expenses |  | 0.4 |  |  | 118.7 |  |  | 1.2 |
Reserve for uncertain tax positions |  | 0.7 |  |  | (13.7) |  |  | (0.1) |
Other |  | (0.6) |  |  | 12.2 |  |  | (1.9) |
Effective income tax rate |  | 26.5 | % |  | 290.5 | % |  | 24.6 | %
Schedule of deferred income tax (liabilities) assets | The approximate effect of the temporary differences giving rise to deferred income tax assets (liabilities) were as follows:
|  | As of December 31,
(in thousands) |  | 2020 |  | 2019
Temporary differences: |  |  |  |
Property and equipment |  | $ | (31,003) |  |  | $ | (33,802) |
Goodwill and other intangible assets |  | (119,074) |  |  | (100,841) |
Investments, primarily gains and losses not yet recognized for tax purposes |  | (2,989) |  |  | 3,176 |
Accrued expenses not deductible until paid |  | 7,748 |  |  | 7,694 |
Deferred compensation and retiree benefits not deductible until paid |  | 46,242 |  |  | 54,258 |
Operating lease right-of-use assets |  | (12,480) |  |  | (31,039) |
Operating lease liabilities |  | 12,089 |  |  | 32,632 |
Interest limitation carryforward |  | — |  |  | 12,527 |
Other temporary differences, net |  | 966 |  |  | 3,422 |
Total temporary differences |  | (98,501) |  |  | (51,973) |
Federal and state net operating loss carryforwards |  | 15,532 |  |  | 51,308 |
Valuation allowance for state deferred tax assets |  | (2,875) |  |  | (4,905) |
Net deferred tax liability |  | $ | (85,844) |  |  | $ | (5,570) |
Gross unrecognized tax benefit reconciliation | A reconciliation of the beginning and ending balances of the total amounts of gross unrecognized tax benefits is as follows:
|  | For the years ended December 31,
(in thousands) |  | 2020 |  | 2019 |  | 2018
Gross unrecognized tax benefits at beginning of year |  | $ | 576 |  |  | $ | 1,112 |  |  | $ | 1,088 |
Increases in tax positions for prior years |  | 166 |  |  | 87 |  |  | 130 |
Decreases in tax positions for prior years |  | (141) |  |  | (387) |  |  | (33) |
Increases in tax positions for current years |  | 1,661 |  |  | — |  |  | 182 |
Decreases in tax positions for current years |  | — |  |  | (167) |  |  | — |
Increases (decreases) from lapse in statute of limitations |  | 114 |  |  | (69) |  |  | (255) |
Gross unrecognized tax benefits at end of year |  | $ | 2,376 |  |  | $ | 576 |  |  | $ | 1,112 |

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