Consolidated Statements Of Income (USD $) In Thousands, except Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Consolidated Statements Of Income [Abstract]
Revenues, net	$ 134,213	$ 111,655	$ 379,431	$ 327,294
Expenses:
Merchant commissions	13,347	13,711	36,505	39,549
Processing	20,878	17,764	58,585	52,608
Selling	9,484	8,638	26,274	23,155
General and administrative	19,729	13,555	59,718	40,025
Gross profit, total	70,775	57,987	198,349	171,957
Depreciation and amortization	9,052	8,925	26,247	25,238
Operating income	61,723	49,062	172,102	146,719
Other income, net	(518)	(696)	(608)	(767)
Interest expense, net	3,130	5,557	9,944	16,352
Loss on early extinguishment of debt			2,669
Total other expense	2,612	4,861	12,005	15,585
Income before taxes	59,111	44,201	160,097	131,134
Provision for taxes	18,597	10,803	50,534	40,752
Net income	40,514	33,398	109,563	90,382
Calculation of income attributable to common shareholders:
Convertible preferred stock accrued dividends		(4,529)		(13,365)
Income attributable to common shareholders for basic earnings per share	$ 40,514	$ 28,869	$ 109,563	$ 77,017
Earnings per share:
Basic earnings per share	$ 0.50	$ 0.85	$ 1.36	$ 2.26
Diluted earnings per share	$ 0.48	$ 0.41	$ 1.31	$ 1.12
Weighted average shares outstanding:
Basic weighted average shares outstanding	80,819	34,076	80,305	34,025
Diluted weighted average shares outstanding	83,649	80,880	83,526	80,691