XML 128 R71.htm IDEA: XBRL DOCUMENT v3.24.0.1
Income Taxes - Deferred Income Tax Assets and Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Deferred tax assets:    
Properties and equipment $ 3.5 $ 3.5
Accrued expenses 34.8 28.7
Stock-based compensation 3.3 3.2
Net operating loss and tax credit carryforwards 14.0 18.0
Goodwill and intangibles 4.8 0.9
Pension benefits 15.6 14.8
Gross deferred tax assets 76.0 69.1
Valuation allowance (0.5) (0.7)
Total deferred tax assets 75.5 68.4
Deferred tax liabilities:    
Properties and equipment (40.6) (35.4)
Pension benefits (11.9) (10.1)
Goodwill and intangibles (62.4) (63.1)
Other (1.8) (1.9)
Gross deferred tax liabilities (116.7) (110.5)
Net deferred tax liabilities $ (41.2) $ (42.1)