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Significant Components of Contract Acquisition Costs (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]    
Conversion costs, net $ 159,000 $ 159,339
Payments for processing rights, net 88,811 76,966
Total $ 247,811 $ 236,305