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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2023
Income Tax Disclosure [Abstract]  
Schedule of Income before Income Tax
For the years ended December 31, 2023, 2022, and 2021, our income tax provision was calculated based on income before income taxes as follows (in thousands):
 202320222021
United States$844,002 $523,273 $497,421 
Foreign28,851 35,477 31,882 
 $872,853 $558,750 $529,303 
Schedule of Income Tax Provision
The income tax provision for the years ended December 31, 2023, 2022, and 2021 consisted of the following (in thousands):
 202320222021
Current provision:   
Federal$187,463 $100,707 $95,782 
State and local62,316 36,547 35,883 
Foreign6,396 4,891 4,420 
 256,175 142,145 136,085 
Deferred (benefit) provision
(16,651)10,483 9,517 
 $239,524 $152,628 $145,602 
Schedule of U.S. Statutory Income Tax Rate Rec
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, 2023, 2022, and 2021 were as follows (in thousands):
 202320222021
Federal income taxes at the statutory rate$183,230 $117,338 $111,118 
State and local income taxes, net of federal tax benefits46,752 29,519 31,257 
Permanent differences9,513 5,261 5,316 
Foreign income taxes (including UK statutory rate changes)640 (155)(2,241)
Other(611)665 152 
 $239,524 $152,628 $145,602 
Schedule of Deferred Tax Assets and Liabilities The deferred income tax assets and deferred income tax liabilities recorded as of December 31, 2023 and 2022 were as follows (in thousands):
 December 31, 2023December 31, 2022
Deferred income tax assets:  
Excess of amounts expensed for financial statement purposes over amounts deducted for income tax purposes:
Insurance liabilities$59,667 $57,278 
Operating lease liabilities92,410 78,391 
Deferred compensation54,313 40,682 
Other (including liabilities and reserves)40,110 35,584 
Total deferred income tax assets246,500 211,935 
Valuation allowance for deferred tax assets(4,385)(3,580)
Net deferred income tax assets242,115 208,355 
Deferred income tax liabilities:  
Costs capitalized for financial statement purposes and deducted for income tax purposes:  
Goodwill and identifiable intangible assets(165,073)(153,767)
Operating lease right-of-use assets(85,883)(73,134)
Depreciation of property, plant, and equipment
(30,075)(28,435)
Pension asset(4,660)(4,082)
Other(13,063)(10,500)
Total deferred income tax liabilities(298,754)(269,918)
Net deferred income tax liabilities$(56,639)$(61,563)