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Intangible Assets - Amortization Expense for Developed Curricula and Student Relationships (Details)
$ in Thousands
Dec. 31, 2021
USD ($)
Amortization expense  
2022 $ 8,419
2023 8,419
2024 8,419
2025 8,419
2026 8,419
Thereafter 143,124
Net Carrying Amount $ 185,219