Other Assets - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended
	Dec. 31, 2027	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Schedule of Other Assets [Line Items]
Prepaid expenses, net of current portion		$ 22,247		$ 22,418
Capital contributions		$ 72	$ 118
Scenario, Forecast
Schedule of Other Assets [Line Items]
Capital contributions	$ 1,700
Minimum
Schedule of Other Assets [Line Items]
Ownership percentage		3.00%
Maximum
Schedule of Other Assets [Line Items]
Ownership percentage		5.00%
Jack Welch Management Institute
Schedule of Other Assets [Line Items]
Commitment for future services under the perpetual license agreement				$ 25,300
Prepaid expenses, net of current portion		$ 20,300
Prepaid expense, amortization period		15 years