Software and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Software, net	$ 175,708		$ 185,496
Software, accumulated amortization	194,700		195,000
Other intangible assets amortization expense	4,800	$ 5,800
Software Marketed for External Sale [Member]
Finite-Lived Intangible Assets [Line Items]
Software, net	49,200		52,300
Software, amortization expense	$ 3,300	3,300
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	$ 126,500		$ 133,200
Software, amortization expense	$ 11,300	$ 11,900
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