Income taxes - Schedule of Deferred Tax Liabilities and Assets (Details) - USD ($) $ in Thousands |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|---|---|---|---|---|
| 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 | $ 43,467 | $ 45,661 |
| Total net deferred tax liabilities | $ 556,131 | $ 548,374 |
| X | ||||||||||
- Definition Deferred Tax Assets, Operating Lease, Liabilities No definition available.
|
| X | ||||||||||
- Definition Deferred Tax Liabilities, Operating Lease, Right of Use Assets No definition available.
|
| X | ||||||||||
- Definition Amount of deferred tax liability attributable to taxable temporary differences. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from employee compensation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from postretirement benefits. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of deferred tax liability attributable to taxable temporary differences from intangible assets including goodwill. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of deferred tax liability attributable to taxable temporary differences classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|