Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Income Statement [Abstract]
Revenues, net	$ 416,166	$ 253,908
Expenses:
Merchant commissions	27,326	17,623
Processing	81,356	36,856
Selling	26,331	17,414
General and administrative	69,297	43,461
Depreciation and amortization	48,082	24,418
Operating income	163,774	114,136
Equity method investment loss	2,700
Other expense, net	1,860	544
Interest expense, net	19,566	5,461
Total other expense	24,126	6,005
Income before income taxes	139,648	108,131
Provision for income taxes	45,495	33,022
Net income	$ 94,153	$ 75,109
Earnings per share:
Basic earnings per share	$ 1.03	$ 0.91
Diluted earnings per share	$ 1.00	$ 0.88
Weighted average shares outstanding:
Basic weighted average shares outstanding	91,750	82,737
Diluted weighted average shares outstanding	93,934	85,695