Allowance for Credit Losses - Summary of Activity in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Credit Loss [Abstract]
Balance at the beginning of period	$ 2,021	$ 1,200
Provision for expected credit losses	217	132
Write-offs charged against the allowance	(195)	(1)
Balance at the end of period	$ 2,043	$ 1,331