Revenues - A Rollforward of Our Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Bad debt expense	$ (247)	$ 2,355
Trade Accounts Receivable
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	(3,942)
Bad debt expense	490
Write-offs	934
Recovery of previous write offs	(180)
Ending balance	$ (2,698)