Condensed Consolidated Statements of Income - Unaudited (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenues:
Processing and related services	$ 134,634	$ 136,314
Software, maintenance and services	45,998	48,693
Total revenues	180,632	185,007
Cost of revenues (exclusive of depreciation, shown separately below):
Processing and related services	61,577	61,960
Software, maintenance and services	31,777	28,009
Total cost of revenues	93,354	89,969
Other operating expenses:
Research and development	28,545	27,922
Selling, general and administrative	34,797	31,625
Depreciation	5,000	5,837
Restructuring charges	901	702
Total operating expenses	162,597	156,055
Operating income	18,035	28,952
Other income (expense):
Interest expense	(2,929)	(4,152)
Amortization of original issue discount	(1,299)	(1,203)
Interest and investment income, net	155	220
Other, net	(418)	(205)
Total other	(4,491)	(5,340)
Income before income taxes	13,544	23,612
Income tax benefit (provision)	1,354	(11,806)
Net income	$ 14,898	$ 11,806
Weighted-average shares outstanding - Basic:
Common stock	32,133	32,392
Participating restricted stock		66
Total	32,133	32,458
Weighted-average shares outstanding - Diluted:
Common stock	32,527	32,561
Participating restricted stock		66
Total	32,527	32,627
Earnings per common share:
Basic	$ 0.46	$ 0.36
Diluted	$ 0.46	$ 0.36