Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues:
Processing and related services	$ 544,649	$ 524,666	$ 497,775
Software, maintenance and services	212,217	210,065	51,604
Total revenues	756,866	734,731	549,379
Cost of revenues (exclusive of depreciation, shown separately below):
Processing and related services	258,380	244,776	258,638
Software, maintenance and services	125,436	120,874	31,166
Total cost of revenues	383,816	365,650	289,804
Other operating expenses:
Research and development	112,938	111,142	78,050
Selling, general and administrative	138,783	128,346	82,586
Depreciation	22,286	25,435	22,428
Restructuring charges	2,469	7,873	2,169
Total operating expenses	660,292	638,446	475,037
Operating income	96,574	96,285	74,342
Other income (expense):
Interest expense	(15,983)	(17,026)	(6,976)
Amortization of original issue discount	(4,954)	(5,206)	(6,893)
Interest and investment income, net	855	764	754
Loss on repurchase of convertible debt securities			(12,714)
Loss on foreign currency transactions			(14,023)
Other, net	732	1,155	(817)
Total other	(19,350)	(20,313)	(40,669)
Income before income taxes	77,224	75,972	33,673
Income tax provision	(28,345)	(33,690)	(11,244)
Net income	$ 48,879	$ 42,282	$ 22,429
Weighted-average shares outstanding - Basic:
Common stock	32,142	32,624	32,537
Participating restricted stock	17	189	543
Total	32,159	32,813	33,080
Weighted-average shares outstanding - Diluted:
Common stock	32,459	32,833	32,822
Participating restricted stock	17	189	543
Total	32,476	33,022	33,365
Earnings per common share:
Basic	$ 1.52	$ 1.29	$ 0.68
Diluted	$ 1.51	$ 1.28	$ 0.67