Software and Other Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Software, net	$ 193,130,000		$ 191,468,000
Software, accumulated amortization	103,200,000
Other intangible assets amortization expense	6,500,000	3,800,000
Software Marketed for External Sale
Finite-Lived Intangible Assets [Line Items]
Software, net	90,800,000
Software, amortization expense	3,500,000	3,200,000
Software Marketed for External Sale | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	3 years
Software Marketed for External Sale | 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	102,300,000
Software, amortization expense	$ 5,200,000	$ 3,400,000
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