Revenue and Accounts Receivable, Net - Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Trade receivables, gross	$ 130,888	$ 133,774
Allowance for doubtful accounts	(1,492)	(1,121)	$ (1,064)	$ (904)
Allowance for sales returns	(623)	(731)
Net trade receivables	128,773	131,922
Other	10,425	12,767
Accounts receivable, net	$ 139,198	$ 144,689