Significant Components of Contract Acquisition Costs (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Finite lived intangible assets	$ 249,148	$ 247,811
Conversion costs
Acquired Finite-Lived Intangible Assets [Line Items]
Finite lived intangible assets	151,870	159,000
Payments for processing rights
Acquired Finite-Lived Intangible Assets [Line Items]
Finite lived intangible assets	$ 97,278	$ 88,811