CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Allowance for credit loss	$ 11,316	$ 7,686	$ 7,779	$ 8,685
Common stock, par value (in USD per share)	$ 0.000001	$ 0.000001
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	73,976,487	71,185,468
Common stock, shares outstanding (in shares)	73,976,487	71,185,468