v3.26.3
Income Taxes (Narrative) (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Income Taxes [Line Items]          
Income Tax Expense (Benefit) $ 21,900,000 $ 56,800,000 $ 66,900,000 $ 84,900,000  
Income taxes payable 25,949,000   $ 25,949,000   $ 8,995,000
Effective Income Tax Rate     14.60% 30.60%  
Kaplan Languages Group (KLG) [Member] | Organisation for Economic Co-operation and Development (OECD), Pillar Two [Member]          
Income Taxes [Line Items]          
Income Tax Expense (Benefit)     $ 15,300,000    
Income taxes payable $ 15,300,000   15,300,000    
U. S. [Member] | Kaplan Languages Group (KLG) [Member]          
Income Taxes [Line Items]          
Income Tax Expense (Benefit)     (68,100,000)    
Foreign jurisdictions [Member] | Kaplan Languages Group (KLG) [Member]          
Income Taxes [Line Items]          
Income Tax Expense (Benefit)     $ 0