Software and Other Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Software, net	$ 191,465,000		$ 191,465,000		$ 191,468,000
Software, accumulated amortization	110,200,000		110,200,000		95,300,000
Other intangible assets amortization expense	5,800,000	4,800,000	12,300,000	8,600,000
Software Marketed for External Sale
Finite-Lived Intangible Assets [Line Items]
Software, net	88,200,000		88,200,000		94,000,000
Software, amortization expense	3,600,000	3,500,000	7,100,000	6,700,000
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	103,300,000		103,300,000		97,500,000
Software, amortization expense	$ 6,000,000	$ 4,400,000	$ 11,200,000	$ 7,800,000
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