Accounts Receivable and Inventories - Allowance For Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of the period	$ 3,304	$ 1,837
Provision for expected credit losses	862	342
Write-offs and adjustments, net of recoveries	(782)	(163)
Balance at end of the period	$ 3,384	$ 2,016