Summary of Transactions Stock Options Issued Pursuant to Stock Incentive Plans (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014
Number of Shares
Outstanding, Beginning Balance	2,469,607
Exercised	(120,577)
Cancelled	(12,057)
Outstanding, Ending Balance	2,346,017
Number of Shares Exercisable, Ending Balance	1,665,677
Weighted-Average Exercise Price
Beginning Balance	$ 33.07
Exercised	$ 23.90
Cancelled	$ 54.47
Ending Balance	$ 33.54
Weighted Average Exercise Price Exercisable, Ending Balance	$ 26.74
Weighted-Average Remaining Contractual Term (Years)
Weighted Average Remaining Contractual Term (Years), Outstanding as of end of period	5 years 8 months 9 days
Weighted Average Remaining Contractual Term (Years), Exercisable as of end of period	4 years 3 months 22 days
Aggregate Intrinsic Value of In-the-Money Options
Aggregate Intrinsic Value of In-the-Money Options, Outstanding as of end of period	$ 60,959,472
Aggregate Intrinsic Value of In-the-Money Options, Exercisable as of end of period	54,047,694
Online Resources Corporation
Number of Shares
Outstanding, Beginning Balance	20,815
Exercised	(121)
Cancelled	(2,757)
Outstanding, Ending Balance	17,937
Number of Shares Exercisable, Ending Balance	17,937
Weighted-Average Exercise Price
Beginning Balance	$ 105.09
Exercised	$ 41.76
Cancelled	$ 101.35
Ending Balance	$ 106.09
Weighted Average Exercise Price Exercisable, Ending Balance	$ 106.09
Weighted-Average Remaining Contractual Term (Years)
Weighted Average Remaining Contractual Term (Years), Outstanding as of end of period	2 years 1 month 2 days
Weighted Average Remaining Contractual Term (Years), Exercisable as of end of period	2 years 1 month 2 days
Aggregate Intrinsic Value of In-the-Money Options
Aggregate Intrinsic Value of In-the-Money Options, Outstanding as of end of period	45,667
Aggregate Intrinsic Value of In-the-Money Options, Exercisable as of end of period	$ 45,667