Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues:
Processing and related services	$ 138,993	$ 131,099	$ 408,669	$ 391,590
Software, maintenance and services	51,008	51,654	150,190	155,567
Total revenues	190,001	182,753	558,859	547,157
Cost of revenues (exclusive of depreciation, shown separately below):
Processing and related services	67,585	62,167	191,879	184,228
Software, maintenance and services	32,826	30,821	91,021	90,400
Total cost of revenues	100,411	92,988	282,900	274,628
Other operating expenses:
Research and development	28,526	27,921	84,242	84,479
Selling, general and administrative	33,963	31,011	99,387	96,876
Depreciation	5,373	6,404	17,084	18,924
Restructuring charges		1,662	821	3,008
Total operating expenses	168,273	159,986	484,434	477,915
Operating income	21,728	22,767	74,425	69,242
Other income (expense):
Interest expense	(4,078)	(4,175)	(12,336)	(12,841)
Amortization of original issue discount	(1,251)	(1,158)	(3,680)	(4,027)
Interest and investment income, net	263	186	635	595
Other, net	452	2,151	524	863
Total other	(4,614)	(2,996)	(14,857)	(15,410)
Income before income taxes	17,114	19,771	59,568	53,832
Income tax provision	(7,701)	(9,292)	(26,479)	(22,844)
Net income	$ 9,413	$ 10,479	$ 33,089	$ 30,988
Weighted-average shares outstanding - Basic:
Common stock	31,980	32,765	32,189	32,747
Participating restricted stock		141	22	210
Total	31,980	32,906	32,211	32,957
Weighted-average shares outstanding - Diluted:
Common stock	32,398	32,887	32,423	32,937
Participating restricted stock		141	22	210
Total	32,398	33,028	32,445	33,147
Earnings per common share:
Basic	$ 0.29	$ 0.32	$ 1.03	$ 0.94
Diluted	$ 0.29	$ 0.32	$ 1.02	$ 0.93