Revenue and Accounts Receivable, Net - Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Trade receivables, gross	$ 122,882	$ 130,888
Allowance for bad debts	(1,797)	(1,492)	$ (1,292)	$ (1,121)
Allowance for sales returns	(618)	(623)
Net trade receivables	120,467	128,773
Other	7,627	10,425
Accounts receivable, net	$ 128,094	$ 139,198