Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Payables and Accruals [Abstract]
Trade payables	$ 64,049	$ 47,503
Accrued compensation and benefits	33,160	33,924
Accrued student obligations	4,017	4,580
Real estate liabilities	668	751
Other	2,848	4,070
Accounts payable and accrued liabilities	$ 104,742	$ 90,828