Segments Schedule of Revenue by Product (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Revenues, net	$ 609,991	$ 577,877	$ 541,237	$ 520,433	$ 514,953	$ 484,426	$ 417,905	$ 414,262	$ 2,249,538	$ 1,831,546	$ 1,702,865
Fuel
Segment Reporting Information [Line Items]
Revenues, net									1,096,153	997,398	1,115,570
Corporate payments
Segment Reporting Information [Line Items]
Revenues, net									261,822	179,557	162,283
Tolls
Segment Reporting Information [Line Items]
Revenues, net									326,977	102,740	9,337
Lodging
Segment Reporting Information [Line Items]
Revenues, net									126,657	100,664	91,751
Gift
Segment Reporting Information [Line Items]
Revenues, net									194,099	184,743	170,095
Other
Segment Reporting Information [Line Items]
Revenues, net									$ 243,830	$ 266,444	$ 153,829