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Goodwill and Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Jun. 30, 2025
Intangible Assets [Line Items]    
Amortizable Intangible Assets, Gross Carrying Amount $ 56,091 $ 56,091
Amortizable Intangible Assets, Accumulated Amortization (46,282) (43,477)
Curriculum    
Intangible Assets [Line Items]    
Amortizable Intangible Assets, Gross Carrying Amount 56,091 56,091
Amortizable Intangible Assets, Accumulated Amortization $ (46,282) $ (43,477)
Amortizable Intangible Assets, Weighted Average Amortization Period 5 years