Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues, net	$ 707,534	$ 519,591	$ 433,841
Expenses:
Merchant commissions	58,573	51,199	49,050
Processing	115,446	84,516	69,687
Selling	46,429	36,606	32,731
General and administrative	110,122	84,765	78,135
Depreciation and amortization	52,036	36,171	33,745
Operating income	324,928	226,334	170,493
Other expense (income), net	1,121	(589)	(1,319)
Interest expense, net	13,017	13,377	20,532
Loss on early extinguishment of debt		2,669
Total other expense	14,138	15,457	19,213
Income before income taxes	310,790	210,877	151,280
Provision for income taxes	94,591	63,542	43,384
Net income	216,199	147,335	107,896
Calculation of income attributable to common shareholders:
Convertible preferred stock accrued dividends			(1,488)
Income attributable to common shareholders for basic earnings per share	$ 216,199	$ 147,335	$ 106,408
Earnings per share:
Basic earnings per share	$ 2.59	$ 1.83	$ 3.00
Diluted earnings per share	$ 2.52	$ 1.76	$ 1.34
Weighted average shares outstanding:
Basic weighted average shares outstanding	83,328	80,610	35,434
Diluted weighted average shares outstanding	85,736	83,654	80,751