Purchase Price Allocation (Detail) (S1 Corporation, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012 Year
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Cash and cash equivalents	97,748
Billed and accrued receivables, net	62,584
Other current assets	27,708
Total current assets acquired	188,040
Property and equipment	25,991
Goodwill	271,286
Other noncurrent assets	17,897
Total assets acquired	705,041
Deferred revenue	34,341
Accrued employee compensation	33,975
Other current liabilities	26,400
Total current liabilities acquired	94,716
Noncurrent liabilities acquired	23,041
Total liabilities acquired	117,757
Net assets acquired	587,284
Software
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Amortizable intangible assets	88,277
Software | Minimum
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Acquired intangible assets, weighted-average useful lives (in years)	5
Software | Maximum
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Acquired intangible assets, weighted-average useful lives (in years)	10
Customer relationships
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Amortizable intangible assets	108,690
Customer relationships | Minimum
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Acquired intangible assets, weighted-average useful lives (in years)	10
Customer relationships | Maximum
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Acquired intangible assets, weighted-average useful lives (in years)	20
Trademarks
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Amortizable intangible assets	4,500
Acquired intangible assets, weighted-average useful lives (in years)	3
Covenant not to compete
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Amortizable intangible assets	360
Acquired intangible assets, weighted-average useful lives (in years)	3