Summary of Transactions Stock Options Issued Pursuant to Stock Incentive Plans (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014
Number of Shares
Outstanding, Beginning Balance	7,408,821
Exercised	(542,391)
Outstanding, Ending Balance	6,830,667
Number of Shares Exercisable, Ending Balance	5,002,719
Weighted-Average Exercise Price
Beginning Balance	$ 11.02
Exercised	$ 7.57
Ending Balance	$ 11.28
Weighted Average Exercise Price Exercisable, Ending Balance	$ 9.19
Weighted-Average Remaining Contractual Term (Years)
Weighted Average Remaining Contractual Term (Years), Outstanding as of end of period	5 years 5 months 5 days
Weighted Average Remaining Contractual Term (Years), Exercisable as of end of period	4 years 2 months 9 days
Aggregate Intrinsic Value of In-the-Money Options
Aggregate Intrinsic Value of In-the-Money Options, Outstanding as of end of period	$ 51,913,490
Aggregate Intrinsic Value of In-the-Money Options, Exercisable as of end of period	47,115,588
Online Resources Corporation
Number of Shares
Outstanding, Beginning Balance	62,445
Exercised	(909)
Expired	(12,867)
Outstanding, Ending Balance	48,669
Number of Shares Exercisable, Ending Balance	48,669
Weighted-Average Exercise Price
Beginning Balance	$ 35.03
Exercised	$ 13.92
Expired	$ 30.80
Ending Balance	$ 36.54
Weighted Average Exercise Price Exercisable, Ending Balance	$ 36.54
Weighted-Average Remaining Contractual Term (Years)
Weighted Average Remaining Contractual Term (Years), Outstanding as of end of period	2 years 18 days
Weighted Average Remaining Contractual Term (Years), Exercisable as of end of period	2 years 18 days
Aggregate Intrinsic Value of In-the-Money Options
Aggregate Intrinsic Value of In-the-Money Options, Outstanding as of end of period	34,303
Aggregate Intrinsic Value of In-the-Money Options, Exercisable as of end of period	$ 34,303