SEGMENT INFORMATION (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Result of operation for each segment    
Total revenue $ 705,611 $ 537,578
Network fees and other costs 331,146 249,046
Sales and marketing 116,055 78,444
Segment profit 258,410 210,088
Operating Segments | Merchant Services    
Result of operation for each segment    
Total revenue 586,712 418,766
Network fees and other costs 296,030 213,440
Sales and marketing 110,175 71,751
Segment profit 180,507 133,575
Operating Segments | Financial Institution Services    
Result of operation for each segment    
Total revenue 118,899 118,812
Network fees and other costs 35,116 35,606
Sales and marketing 5,880 6,693
Segment profit $ 77,903 $ 76,513