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Summary of Investments (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Investments Debt And Equity Securities [Abstract]
Certificates of deposit and other securities, Current	$ 10,624	$ 8,183
Certificates of deposit and other securities, Non-Current	$ 16	$ 16

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- Definition

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- Definition

Certificates of deposit and other securities non current

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