Other Assets - Schedule of Other Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid expenses, net of current portion	$ 21,271		$ 22,418
Equity method investments	17,401	$ 17,879	15,795	$ 16,990	$ 15,805	$ 15,795
Cloud computing arrangements	8,112		6,385
Other investments	2,999		2,527
Other	10,104		7,803
Other assets	$ 59,887		$ 54,928