Unaudited Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Revenues, net	$ 948,174	$ 861,278	$ 1,849,507	$ 1,650,519
Expenses:
Processing	205,265	185,588	410,232	359,782
Selling	86,412	79,324	168,004	156,213
General and administrative	159,356	147,446	314,040	290,968
Depreciation and amortization	83,676	78,474	167,908	155,276
Other operating, net	815	(34)	1,478	79
Operating income	412,650	370,480	787,845	688,201
Other expenses:
Investment loss (gain)	18	193	(172)	345
Other (income) expense, net	(2,424)	3,564	(1,678)	4,433
Interest expense, net	88,486	23,070	168,281	45,100
Total other expense	86,080	26,827	166,431	49,878
Income before income taxes	326,570	343,653	621,414	638,323
Provision for income taxes	86,868	81,482	166,877	158,200
Net income	$ 239,702	$ 262,171	$ 454,537	$ 480,123
Basic earnings per share (in dollars per share)	$ 3.24	$ 3.42	$ 6.17	$ 6.22
Diluted earnings per share (in dollars per share)	$ 3.20	$ 3.35	$ 6.08	$ 6.10
Weighted average shares outstanding:
Basic (in shares)	73,887	76,769	73,705	77,250
Diluted (in shares)	75,001	78,239	74,763	78,762