Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenues:
Processing and related services	$ 524,666	$ 497,775	$ 464,970
Software, maintenance and services	210,065	51,604	35,747
Total revenues	734,731	549,379	500,717
Cost of revenues (exclusive of depreciation, shown separately below):
Processing and related services	244,776	258,638	249,335
Software, maintenance and services	120,874	31,166	26,344
Total cost of revenues	365,650	289,804	275,679
Other operating expenses:
Research and development	111,142	78,050	70,113
Selling, general and administrative	128,346	82,586	59,510
Depreciation	25,435	22,428	20,069
Restructuring charges	7,873	2,169	599
Total operating expenses	638,446	475,037	425,970
Operating income	96,285	74,342	74,747
Other income (expense):
Interest expense	(17,026)	(6,976)	(5,660)
Amortization of original issue discount	(5,206)	(6,893)	(8,382)
Interest and investment income, net	764	754	1,194
Gain (loss) on repurchase of convertible debt securities		(12,714)	1,468
Loss on foreign currency transactions		(14,023)
Other, net	1,155	(817)	2
Total other	(20,313)	(40,669)	(11,378)
Income from continuing operations before income taxes	75,972	33,673	63,369
Income tax provision	(33,690)	(11,244)	(21,507)
Income from continuing operations	42,282	22,429	41,862
Discontinued operations:
Income from discontinued operations
Income tax benefit			1,471
Discontinued operations, net of tax			1,471
Net income	$ 42,282	$ 22,429	$ 43,333
Basic earnings per common share:
Income from continuing operations	$ 1.29	$ 0.68	$ 1.22
Discontinued operations, net of tax			$ 0.04
Net income	$ 1.29	$ 0.68	$ 1.26
Diluted earnings per common share:
Income from continuing operations	$ 1.28	$ 0.67	$ 1.22
Discontinued operations, net of tax			$ 0.04
Net income	$ 1.28	$ 0.67	$ 1.26
Weighted-average shares outstanding-Basic:
Common stock	32,624	32,537	33,228
Participating restricted stock	189	543	1,097
Total	32,813	33,080	34,325
Weighted-average shares outstanding-Diluted:
Common stock	32,833	32,822	33,352
Participating restricted stock	189	543	1,097
Total	33,022	33,365	34,449