Other Assets - Schedule of Other Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021	Mar. 31, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid expenses, net of current portion	$ 17,471		$ 18,192
Equity method investments	17,205	$ 14,874	13,879	$ 14,011	$ 15,582	$ 13,887
Cloud computing arrangements, net of current portion	10,980		7,507
Other investments	2,806		3,396
Tuition receivable, net, non-current	2,541		2,673
Other	3,809		4,005
Other assets	$ 54,812		$ 49,652