Accounts Receivable - Accounts Receivable Balance (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Receivables [Abstract]
Accounts receivable	$ 248,382		$ 350,369
Less: Accounts receivable allowance	(9,744)	$ (11,074)	(16,511)
Accounts receivable, net	$ 238,638		$ 333,858	$ 226,997	$ 331,295

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant