Accounts Receivable - Schedule of Accounts Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Receivables [Abstract]
Accounts receivable	$ 223,362	$ 219,197
Expected credit losses	(7,955)	(6,632)	$ (5,348)	$ (5,081)
Accounts receivable, net of expected credit losses	$ 215,407	$ 212,565