Subsequent Events (Details) $ in Thousands		1 Months Ended	3 Months Ended
	Apr. 23, 2018 USD ($)	Apr. 30, 2018 USD ($)	Mar. 31, 2017 USD ($)	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018
Subsequent Events
Purchase of noncontrolling interest			$ 70,000
Subsequent Events.
Subsequent Events
Minimum fixed charge coverage ratio								2.5
Maximum consolidated leverage ratio				3.50	3.75	3.75	3.75	4.00
Subsequent Events. | Central Payments Co., LLC
Subsequent Events
Purchase of noncontrolling interest		$ 126,000
Subsequent Events. | Revolving senior credit facility
Subsequent Events
Maximum borrowing capacity	$ 1,750,000
Term	5 years
Subsequent Events. | Standby letters of credit
Subsequent Events
Maximum borrowing capacity	$ 50,000
Subsequent Events. | Central Payments Co., LLC
Subsequent Events
Noncontrolling equity interest acquired (as a percent)		15.00%