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Goodwill and Intangible Assets - Additional Information (Detail) (USD $)
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12 Months Ended | |||
|---|---|---|---|---|
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Goodwill And Intangible Assets Disclosure [Abstract] | ||||
| Impairment charges of cumulative goodwill | $ 54,600,000 | |||
| Other net intangibles | 956,000,000 | 1,200,000 | ||
| Weighted average amortization period of intangible assets | 1 year 6 months 0 days | 2 years 6 months 0 days | 3 years | |
| Amortization expense of intangible assets | 738,000,000 | 1,100,000 | 2,000,000 | |
| Amortization from capitalized software development costs | $ 327,000 | $ 156,000 | $ 39,000 | |