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Basis of Presentation and Summary of Significant Accounting Policies - Goodwill and Other Intangible Assets and Advertising Costs (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jul. 01, 2019
Goodwill [Line Items]
Goodwill impairment	$ 3,200	$ 53,378
Goodwill	1,832,129	2,688,138	$ 2,441,201	$ 1,832,129
Advertising expense		17,400	17,900	16,300
Go Fuel Card
Goodwill [Line Items]
Goodwill					$ 118,746
Fleet Solutions
Goodwill [Line Items]
Goodwill impairment		53,378
Goodwill	$ 1,247,296	1,338,471	$ 1,374,020	$ 1,247,296
Fleet Solutions | Go Fuel Card
Goodwill [Line Items]
Goodwill		$ 65,800

X

- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

+ References

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-Publisher FASB
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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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