Estimated Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 6,140	$ 5,474	$ 5,992	$ 5,610
Adjustment due to the adoption of Topic 326			289
Provision for credit losses	3,619	265	3,632	142
Write-off of uncollectible amounts, net of recoveries	(815)	(240)	(969)	(253)
Ending Balance	$ 8,944	$ 5,499	$ 8,944	$ 5,499