Receivables - Changes in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Jan. 01, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 6,007	$ 10,034
Cumulative effect of accounting change			$ (735)
Credit loss expense	20	386
Write-offs, net of recoveries	(845)	(861)
Balance at end of period	$ 6,141	$ 9,559
ASU 2016-03
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of accounting change			$ 959