BUSINESS COMBINATIONS Pro Forma (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Business Acquisition [Line Items]  
Business Acquisition, Pro Forma Revenue $ 616,268
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax 66,187
Business Acquisition Pro forma Net Income Loss Including Portion Attributable To Noncontrolling Interest 31,365
Business Acquisition, Pro Forma Net Income (Loss) $ 20,914
Net income per share attributable to Vantiv, Inc. Class A common stock [Abstract]  
Business Acquisition, Pro Forma Earnings Per Share, Basic (in dollars per share) $ 0.15
Business Acquisition, Pro Forma Earnings Per Share, Diluted (in dollars per share) $ 0.13
Shares used in computing net income per share of Class A common stock [Abstract]  
Pro Forma Weighted Average Shares Outstanding, Basic (in shares) 138,228,839
Pro Forma Weighted Average Shares Outstanding, Diluted (in shares) 198,949,977