Unaudited Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenues, net	$ 789,241	$ 608,623
Expenses:
Processing	174,194	116,428
Selling	76,889	52,082
General and administrative	143,522	108,362
Depreciation and amortization	76,802	65,729
Other operating, net	113	57
Operating income	317,721	265,965
Investment loss (gain)	152	(9)
Other expense, net	869	1,743
Interest expense, net	22,030	28,551
Total other expense	23,051	30,285
Income before income taxes	294,670	235,680
Provision for income taxes	76,718	51,441
Net income	$ 217,952	$ 184,239
Earnings per share:
Basic earnings per share (in dollars per share)	$ 2.80	$ 2.21
Diluted earnings per share (in dollars per share)	$ 2.75	$ 2.15
Weighted average shares outstanding:
Basic (in shares)	77,737	83,475
Diluted (in shares)	79,286	85,764