Income taxes (Tables)
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12 Months Ended |
Dec. 31, 2022 |
| Income Tax Disclosure [Abstract] |
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| Schedule of Provision (Benefit) for Income Taxes on Income Consists |
The provision (benefit) for income taxes consists of the following (in thousands): | | | | | | | | | | | | | | | | | | | | 2022 | Current | | Deferred | | Total | | Federal | $ | 161,438 | | | $ | 13,435 | | | $ | 174,873 | | | State and other | 23,456 | | | 4,041 | | | 27,497 | | | Total | $ | 184,894 | | | $ | 17,476 | | | $ | 202,370 | |
| | | | | | | | | | | | | | | | | | | | 2021 | Current | | Deferred | | Total | | Federal | $ | 114,255 | | | $ | 15,400 | | | $ | 129,655 | | | State and other | 11,310 | | | (5,484) | | | 5,826 | | | Total | $ | 125,565 | | | $ | 9,916 | | | $ | 135,481 | |
| | | | | | | | | | | | | | | | | | | | 2020 | Current | | Deferred | | Total | | Federal | $ | 123,882 | | | $ | 4,532 | | | $ | 128,414 | | | State and other | 21,878 | | | 4,001 | | | 25,879 | | | Total | $ | 145,760 | | | $ | 8,533 | | | $ | 154,293 | |
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| Schedule of Reconciliation of Effective Tax Rate |
The provision for income taxes varies from the U.S. federal statutory tax rate as a result of the following differences: | | | | | | | | | | | | | | | | | | | 2022 | | 2021 | | 2020 | | U.S. statutory tax rate | 21.0% | | 21.0% | | 21.0% | | Increase (decrease) in taxes resulting from: | | | | | | | State taxes (net of federal income tax benefit) | 2.7 | | 2.6 | | 3.3 | | Uncertain tax positions, settlements and lapse of statutes of limitations | — | | 0.3 | | (0.1) | | Valuation allowance on equity method investment | 0.6 | | — | | 0.4 | | Other valuation allowances, tax rate changes, & deferred adjustments | (0.6) | | (1.7) | | (0.1) | | | | | | | | Non-deductible transaction costs | 0.5 | | 0.1 | | — | | Net excess benefits or expense on share-based payments | (0.3) | | (0.2) | | (0.1) | Other, net | 0.4 | | — | | (0.2) | | Effective tax rate | 24.3% | | 22.1% | | 24.2% |
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| Schedule of Deferred Tax Liabilities and Assets |
Deferred tax liabilities and assets were composed of the following as of December 31, 2022 and 2021 (in thousands): | | | | | | | | | | | | | Dec. 31, | | 2022 | | 2021 | | Deferred tax liabilities | | | | | Accelerated amortization of deductible intangibles | $ | 540,260 | | | $ | 534,438 | | | Accelerated depreciation | 67,278 | | | 67,697 | | | Right-of-use assets for operating leases | 19,467 | | | 21,648 | | | Other | 4,183 | | | 3,792 | | | Total deferred tax liabilities | 631,188 | | | 627,575 | | | Deferred tax assets | | | | | Accrued compensation costs | 23,439 | | | 24,147 | | | Pension and post-retirement medical and life | 20,775 | | | 17,400 | | | Loss carryforwards | 12,537 | | | 31,841 | | | Operating lease liabilities | 20,403 | | | 22,582 | | | Other | 24,242 | | | 25,160 | | | Total deferred tax assets | 101,396 | | | 121,130 | | | Deferred tax asset valuation allowance | 26,339 | | | 41,929 | | | Total net deferred tax liabilities | $ | 556,131 | | | $ | 548,374 | |
The following table summarizes the activity related to deferred tax asset valuation allowances (in thousands): | | | | | | | | | | | | | | | | | | | 2022 | | 2021 | | 2020 | | Beginning at beginning of period | $ | 41,929 | | | $ | 43,467 | | | $ | 45,661 | | | Additions to valuation allowance | 7,228 | | | 6,108 | | | 3,719 | | | Reductions to valuation allowance | (22,818) | | | (7,646) | | | (5,913) | | | Balance at the end of the period | $ | 26,339 | | | $ | 41,929 | | | $ | 43,467 | |
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| Schedule of Activity Related to Unrecognized Tax Benefits, Excluding Federal Tax Benefit of State Tax Deductions |
The following table summarizes the activity related to unrecognized tax benefits, excluding the federal tax benefit of state tax deductions (in thousands): | | | | | | | | | | | | | | | | | | | | 2022 | | 2021 | | 2020 | | Change in unrecognized tax benefits | | | | | | | Balance at beginning of year | $ | 8,196 | | | $ | 7,435 | | | $ | 8,050 | | | Additions for tax positions of prior years | — | | | 1,363 | | | 630 | | | | | | | | | Settlements | (9) | | | — | | | — | | | Reductions due to lapse of statutes of limitations | (462) | | | (602) | | | (1,245) | | | Balance as of end of year | $ | 7,725 | | | $ | 8,196 | | | $ | 7,435 | |
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