Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Revenues, net	$ 451,493	$ 295,283	$ 1,272,264	$ 822,693
Expenses:
Merchant commissions	31,726	25,014	80,777	62,964
Processing	90,959	41,451	246,879	117,152
Selling	27,383	17,950	81,011	52,885
General and administrative	64,439	40,947	196,777	122,304
Depreciation and amortization	48,526	25,714	145,435	74,561
Operating income	188,460	144,207	521,385	392,827
Equity method investment loss	6,108	2,200	13,926	3,689
Other (income) expense, net	(168)	594	2,345	870
Interest expense, net	17,163	4,859	54,818	15,628
Total other expense	23,103	7,653	71,089	20,187
Income before taxes	165,357	136,554	450,296	372,640
Provision for income taxes	48,587	41,045	140,695	113,473
Net income	$ 116,770	$ 95,509	$ 309,601	$ 259,167
Earnings per share:
Basic earnings per share	$ 1.27	$ 1.14	$ 3.37	$ 3.12
Diluted earnings per share	$ 1.24	$ 1.11	$ 3.29	$ 3.02
Weighted average shares outstanding:
Basic weighted average shares outstanding	92,110	83,611	91,923	83,118
Diluted weighted average shares outstanding	94,157	86,134	94,069	85,688