Revenue Recognition Revenue Recognition - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Deferred revenue, revenue recognized	$ 87,000	$ 87,300	$ 81,800
Contract costs	267,978	229,205
Capitalized contract cost, amortization	85,400	$ 72,900	$ 73,100
Revenue, remaining performance obligation	$ 8,400,000