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Software and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Software, net	$ 164,470		$ 164,470		$ 185,496
Software, accumulated amortization	221,000		221,000		195,000
Other intangible assets amortization expense	4,900	$ 5,300	14,500	$ 16,400
Software Marketed for External Sale [Member]
Finite-Lived Intangible Assets [Line Items]
Software, net	44,100		44,100		52,300
Software, amortization expense	3,100	2,900	$ 9,600	9,200
Software Marketed for External Sale [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			3 years
Software Marketed for External Sale [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			10 years
Software Acquired or Developed for Internal Use [Member]
Finite-Lived Intangible Assets [Line Items]
Software, net	120,400		$ 120,400		$ 133,200
Software, amortization expense	$ 11,500	$ 11,300	$ 34,100	$ 34,200
Software Acquired or Developed for Internal Use [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			3 years
Software Acquired or Developed for Internal Use [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			10 years

X

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 30
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- Definition

For each balance sheet presented, the amount of accumulated amortization for capitalized computer software costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of expense for amortization of capitalized computer software costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.

+ References

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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