Revenues - A Rollforward of Our Allowance for Credit Losses (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Bad debt expense	$ (113)	$ 3,733
Trade Accounts Receivable
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	(3,942)
Bad debt expense	353
Write-offs	1,521
Recovery of previous write offs	(313)
Ending balance	$ (2,381)