General and Basis of Presentation - Cash, Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Restricted Cash and Cash Equivalents
Cash and cash equivalents	$ 46,673	$ 51,370	$ 40,245
Current and long-term restricted cash	73,127		47,085
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Total	119,800	99,817	$ 87,330	$ 105,747
Inventory, Net [Abstract]
Inventory, Gross	15,735	16,116
Less: Inventory reserves	(206)	(1,833)
Inventory, net, Total	15,529	14,283
ATMs
Inventory, Net [Abstract]
Inventory, Gross	3,886	3,181
ATM Parts And Supplies
Inventory, Net [Abstract]
Inventory, Gross	$ 11,849	$ 12,935