Fair Value Measures and Disclosures (Policies)	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments, Policy	Fair Value of Financial Instruments — Financial instruments consist of cash and cash equivalents, settlement cash and cash equivalents, investments, derivatives, payment service obligations and debt. The carrying values of cash and cash equivalents, settlement cash and cash equivalents, interest-bearing investments and payment service obligations approximate fair value. The carrying value of debt is stated at amortized cost; however, for disclosure purposes the fair value is estimated. See Note 5 — Fair Value Measurement for information regarding the principles and processes used to estimate the fair value of financial instruments.Assets and liabilities that are disclosed at fair value — Debt and interest-bearing investments are carried at amortized cost; however, the Company estimates the fair value of debt for disclosure purposes. The fair value of the first lien credit facility is estimated using an observable market quotation (Level 2). The fair value of the second lien credit facility is estimated using unobservable market inputs (Level 3), including broker quotes for comparable traded securities and yield curves.