General and Basis of Presentation - Inventory, Restr Cash (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Inventory, Net [Abstract]
Inventory, Gross	$ 18,877	$ 14,471
Less: Inventory reserves	(2,490)	(1,944)
Inventory, net, Total	16,387	12,527
Restricted Cash and Cash Equivalents [Abstract]
Restricted cash	43,646	32,213
ATMs [Member]
Inventory, Net [Abstract]
Inventory, Gross	3,605	1,915
ATM Parts And Supplies [Member]
Inventory, Net [Abstract]
Inventory, Gross	$ 15,272	$ 12,556