Route and Customer Acquisition Costs - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Capitalized Contract Cost [Line Items]
Gross payments due	$ 6,600		$ 6,600		$ 7,400
Net present value of payments due	5,800		5,800		6,500
Current portion of payments due	1,646		1,646		1,700
Customer acquisition cost asset	18,300		18,300		18,700
Capitalized contract cost, subject to claw back	1,800		1,800		$ 2,200
Amortization expense (decrease in expense) on route and customer acquisition costs	$ 500	$ 700	$ 1,400	$ 2,000