Acquisitions - DirectCash Payments Inc (Details) $ / shares in Units, item in Thousands, $ in Thousands, $ in Millions			3 Months Ended
	Jan. 06, 2017 CAD ($) item $ / shares	Jan. 06, 2017 USD ($) item	Mar. 31, 2018 USD ($) item	Dec. 31, 2017 USD ($)	Jan. 06, 2017 USD ($)
Acquisitions and Divestitures
Number of ATMs operated by entity | item			230
Estimated fair values of the assets acquired and liabilities assumed
Goodwill			$ 779,394	$ 774,939
DirectCash Payments Inc. Acquiree
Acquisitions and Divestitures
Amount paid per share | $ / shares	$ 19.00
Total consideration	$ 658	$ 495,000
Number of ATMs operated by entity | item	25	25
Estimated fair values of the assets acquired and liabilities assumed
Current and other non-current assets		$ 50,400
Property and equipment					$ 68,800
Intangible assets					182,100
Goodwill					300,300
Current and other non-current liabilities					74,000
Asset retirement obligations					8,900
Deferred tax liability					$ 23,200