Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Revenues, net	$ 404,605	$ 273,502	$ 820,771	$ 527,410
Expenses:
Merchant commissions	21,725	20,327	49,051	37,950
Processing	74,564	38,845	155,920	75,701
Selling	27,297	17,521	53,628	34,935
General and administrative	63,041	37,896	132,338	81,357
Depreciation and amortization	48,827	24,429	96,909	48,847
Operating income	169,151	134,484	332,925	248,620
Equity method investment loss	5,118	1,489	7,818	1,489
Other expense (income), net	653	(268)	2,513	276
Interest expense, net	18,089	5,308	37,655	10,769
Total other expense	23,860	6,529	47,986	12,534
Income before taxes	145,291	127,955	284,939	236,086
Provision for income taxes	46,613	39,406	92,108	72,428
Net income	$ 98,678	$ 88,549	$ 192,831	$ 163,658
Earnings per share:
Basic earnings per share	$ 1.07	$ 1.07	$ 2.10	$ 1.97
Diluted earnings per share	$ 1.05	$ 1.03	$ 2.05	$ 1.91
Weighted average shares outstanding:
Basic weighted average shares outstanding	91,904	82,996	91,828	82,867
Diluted weighted average shares outstanding	94,050	85,817	93,992	85,757