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Summary of Derivatives and Fair Values (Detail) (Series F Agreement, USD $) In Thousands, unless otherwise specified | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Oct. 31, 2008
Series F Agreement |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional Amount | $ 50,000 | [1] |  |  | $ 50,000
Strike | 5.2175% | [1] |  |  |
Trade Date | Oct. 01, 2008 | [1] |  |  |
Maturity Date | Oct. 01, 2013 | [1] |  |  |
Fair Value of Derivative Liabilities |  |  | $ (826) | [1] |
[1] | Fair value excludes quarterly settlement payment due on Series F Agreement. As of December 31, 2012, the outstanding payable was $305.

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