Revenues Revenue - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract with Customer, Performance Obligation Satisfied in Previous Period	$ 5,600		$ 10,000
Revenue from Contract with Customer, Including Assessed Tax	217,857	$ 220,754	440,476	$ 425,199
Revenue, Remaining Performance Obligation, Amount	76,400		76,400
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract with Customer, Asset, after Allowance for Credit Loss	12,700		12,700		$ 12,600
Contract Asset, Period Increase (Decrease)			100
Deferred revenues	35,044		35,044		$ 28,443
Increase (decrease) in deferred revenues			6,600
Deferred Revenue, Revenue Recognized	6,800		21,300
Change in Estimated Variable Consideration [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract with Customer, Performance Obligation Satisfied in Previous Period	1,600	300	6,200	1,500
Release of Allowance [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract with Customer, Performance Obligation Satisfied in Previous Period	$ 4,000	$ 3,600	$ 3,800	$ 2,100