Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues:
Processing and related services	$ 133,362	$ 129,113	$ 269,676	$ 260,491
Software, maintenance and services	50,489	52,199	99,182	103,913
Total revenues	183,851	181,312	368,858	364,404
Cost of revenues (exclusive of depreciation, shown separately below):
Processing and related services	62,334	60,802	124,294	122,061
Software, maintenance and services	30,186	30,074	58,195	59,579
Total cost of revenues	92,520	90,876	182,489	181,640
Other operating expenses:
Research and development	27,794	27,920	55,716	56,558
Selling, general and administrative	33,799	32,526	65,424	65,865
Depreciation	5,874	6,273	11,711	12,520
Restructuring charges	119	1,346	821	1,346
Total operating expenses	160,106	158,941	316,161	317,929
Operating income	23,745	22,371	52,697	46,475
Other income (expense):
Interest expense	(4,106)	(4,325)	(8,258)	(8,666)
Amortization of original issue discount	(1,226)	(1,420)	(2,429)	(2,869)
Interest and investment income, net	152	175	372	409
Other, net	277	(985)	72	(1,288)
Total other	(4,903)	(6,555)	(10,243)	(12,414)
Income before income taxes	18,842	15,816	42,454	34,061
Income tax provision	(6,972)	(6,801)	(18,778)	(13,552)
Net income	$ 11,870	$ 9,015	$ 23,676	$ 20,509
Weighted-average shares outstanding - Basic:
Common stock	32,194	32,866	32,293	32,738
Participating restricted stock	1	161	34	244
Total	32,195	33,027	32,327	32,982
Weighted-average shares outstanding - Diluted:
Common stock	32,309	33,072	32,435	32,962
Participating restricted stock	1	161	34	244
Total	32,310	33,233	32,469	33,206
Earnings per common share:
Basic	$ 0.37	$ 0.27	$ 0.73	$ 0.62
Diluted	$ 0.37	$ 0.27	$ 0.73	$ 0.62