v3.26.1
Income Taxes (Narrative) (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Income Taxes [Line Items]          
Income Tax Expense (Benefit) $ 35,100,000 $ 20,200,000 $ 45,000,000 $ 28,100,000  
Income taxes payable 23,352,000   $ 23,352,000   $ 8,995,000
Effective Income Tax Rate     12.60% 29.80%  
Kaplan Languages Group (KLG) [Member] | Organisation for Economic Co-operation and Development (OECD), Pillar Two [Member]          
Income Taxes [Line Items]          
Income Tax Expense (Benefit)     $ 19,200,000    
Income taxes payable $ 19,200,000   19,200,000    
U. S. [Member] | Kaplan Languages Group (KLG) [Member]          
Income Taxes [Line Items]          
Income Tax Expense (Benefit)     (69,600,000)    
Foreign jurisdictions [Member] | Kaplan Languages Group (KLG) [Member]          
Income Taxes [Line Items]          
Income Tax Expense (Benefit)     $ 0