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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

Name:	us-gaap_AccountsReceivableGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Revenues - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Revenues - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Revenues Receivable from Customer
Bad debt expense on revenues receivable	$ 0	$ 0	$ 0	$ 0
Revenue Receivable from Contract With Customers
Revenues Receivable from Customer
Revenues receivable	$ 14,500		$ 14,500		$ 12,800