Revenue and Accounts Receivable - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Allowance for Credit Losses [Roll Forward]
Beginning Balance(1)	$ 11,125	$ 7,359	$ 7,881	$ 6,037
Accounts Receivable, Credit Loss Expense (Reversal)	557	819	5,888	2,569
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(849)	(6,235)	(4,246)	(6,663)
Ending Balance	$ 10,833	$ 1,943	10,833	$ 1,943
Accounting Standards Update 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax			$ 1,310