Subsequent Events - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Vantiv, Inc.
Subsequent Event
Voting Power In Vantiv	18.50%
Vantiv, Inc. | Class A Common Shares
Subsequent Event
Shares of Vantiv, Inc. priced	38,600,000
Shares of Vantiv, Inc. sold by the Bancorp	15,600,000
Incremental Share Purchase Option	796,310
Vantiv, Inc. | Class B Common Shares
Subsequent Event
Units Of Equity Method Investment Held	54,600,000
Vantiv Holding, LLC
Subsequent Event
Percentage of Processing Business Bancorp retained	28.00%
Vantiv Holding, LLC | Class B Common Shares
Subsequent Event
Units Of Equity Method Investment Held	54,600,000
Vantiv Holding, LLC | Class C Common Shares
Subsequent Event
Incremental Share Purchase Warrant	20,400,000
Vantiv Holding, LLC | Pre-tax gain
Subsequent Event
Gain on Sale of Processing Business	$ 225
Vantiv Holding, LLC | After-tax gain
Subsequent Event
Gain on Sale of Processing Business	$ 145