Software and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Software, net	$ 208,837		$ 237,941
Software, accumulated amortization	162,500		158,900
Other intangible assets amortization expense	5,800	$ 5,800
Software Marketed for External Sale [Member]
Finite-Lived Intangible Assets [Line Items]
Software, net	56,100		70,100
Software, amortization expense	$ 3,300	3,900
Software Marketed for External Sale [Member] | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	3 years
Software Marketed for External Sale [Member] | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	10 years
Software Acquired or Developed for Internal Use
Finite-Lived Intangible Assets [Line Items]
Software, net	$ 152,700		$ 167,800
Software, amortization expense	$ 11,900	$ 8,500
Software Acquired or Developed for Internal Use | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	3 years
Software Acquired or Developed for Internal Use | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	10 years