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Accounts Payable and Accrued Expenses
 3 Months Ended
Mar. 31, 2022
Payables and Accruals [Abstract]  
Accounts Payable and Accrued Expenses Accounts Payable and Accrued Expenses
Accounts payable and accrued expenses consist of the following as of December 31, 2021 and March 31, 2022 (in thousands):
December 31, 2021March 31, 2022
Trade payables$45,340 $49,481 
Accrued compensation and benefits27,424 31,565 
Accrued student obligations and other22,754 22,888 
Accounts payable and accrued expenses$95,518 $103,934