Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	[1]
Income Statement [Abstract]
Revenues, net	$ 2,388,855	$ 2,648,848	$ 2,433,492
Expenses:
Processing	596,363	530,669	487,695
Selling	192,732	204,806	182,593
General and administrative	374,678	407,210	389,172
Depreciation and amortization	254,802	274,210	274,609
Other operating (income) expense, net	(1,985)	523	8,725
Operating income	972,265	1,231,430	1,090,698
Investment (gain) loss, net	(30,008)	3,470	7,147	[2]
Other (income) expense, net	(10,055)	93	(152,166)
Interest expense, net	129,803	150,048	138,494
Loss on extinguishment of debt	0	0	2,098	[2]
Total other expense (income)	89,740	153,611	(4,427)
Income before income taxes	882,525	1,077,819	1,095,125
Provision for income taxes	178,309	182,746	283,642
Net income	$ 704,216	$ 895,073	$ 811,483	[2]
Earnings per share:
Basic earnings per share (in usd per share)	$ 8.38	$ 10.36	$ 9.14
Diluted earnings per share (in usd per share)	$ 8.12	$ 9.94	$ 8.81
Weighted average shares outstanding:
Basic (in shares)	84,005	86,401	88,750
Diluted (in shares)	86,719	90,070	92,151

[1] The Company applied the modified retrospective transition method when adopting ASU 2016-02 "Leases", therefore the Company's 2018 prior results were not restated to reflect ASU 2016-02. Refer to footnote 14.

[2] The Company applied the modified retrospective transition method when adopting ASU 2016-02 "Leases", therefore the Company's 2018 prior results were not restated to reflect ASU 2016-02. Refer to footnote 14.