Basis of Presentation - Allowance for Credit Losses (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($)
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 1,049
Provision for credit losses during the period	4,291
Provision for credit losses no longer required	(3,843)
Ending balance	$ 1,497