Other Assets - Schedule of Other Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid expenses, net of current portion	$ 22,247	$ 22,418
Equity method investments	17,879	15,795	$ 15,805	$ 15,795
Cloud computing arrangements	7,330	6,385
Other investments	2,527	2,527
Other	10,299	7,803
Other assets	$ 60,282	$ 54,928