Software and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Software, net	$ 197,861		$ 197,861		$ 237,941
Software, accumulated amortization	172,600		172,600		158,900
Other intangible assets amortization expense	5,300	$ 5,700	11,100	$ 11,500
Software Marketed for External Sale [Member]
Finite-Lived Intangible Assets [Line Items]
Software, net	51,800		51,800		70,100
Software, amortization expense	3,000	3,600	$ 6,300	7,500
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	146,100		$ 146,100		$ 167,800
Software, amortization expense	$ 11,000	$ 9,100	$ 22,900	$ 17,600
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