Condensed Consolidated Statements of Income - Unaudited (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:
Processing and related services	$ 133,294	$ 138,993	$ 399,112	$ 408,669
Software, maintenance and services	52,886	51,008	153,807	150,190
Total revenues	186,180	190,001	552,919	558,859
Cost of revenues (exclusive of depreciation, shown separately below):
Processing and related services	65,184	67,585	189,725	191,879
Software, maintenance and services	29,714	32,826	93,285	91,021
Total cost of revenues	94,898	100,411	283,010	282,900
Other operating expenses:
Research and development	27,600	28,526	83,693	84,242
Selling, general and administrative	38,444	33,963	110,629	99,387
Depreciation	4,609	5,373	14,379	17,084
Restructuring charges	76		939	821
Total operating expenses	165,627	168,273	492,650	484,434
Operating income	20,553	21,728	60,269	74,425
Other income (expense):
Interest expense	(2,615)	(4,078)	(8,724)	(12,336)
Amortization of original issue discount	(1,351)	(1,251)	(3,975)	(3,680)
Interest and investment income, net	174	263	517	635
Other, net	(130)	452	950	524
Total other	(3,922)	(4,614)	(11,232)	(14,857)
Income before income taxes	16,631	17,114	49,037	59,568
Income tax provision	(1,331)	(7,701)	(6,767)	(26,479)
Net income	$ 15,300	$ 9,413	$ 42,270	$ 33,089
Weighted-average shares outstanding - Basic:
Common stock	32,084	31,980	32,114	32,189
Participating restricted stock				22
Total	32,084	31,980	32,114	32,211
Weighted-average shares outstanding - Diluted:
Common stock	32,664	32,398	32,553	32,423
Participating restricted stock				22
Total	32,664	32,398	32,553	32,445
Earnings per common share:
Basic	$ 0.48	$ 0.29	$ 1.32	$ 1.03
Diluted	$ 0.47	$ 0.29	$ 1.30	$ 1.02
Cash dividends declared per common share	$ 0.15		$ 0.30