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Guaranteed Preferred Beneficial Interest in the Company's Junior Subordinated Debentures - Summary of Financial Information of Trust (Detail) (USD $)
In Thousands, unless otherwise specified |
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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|---|---|---|---|---|
| Schedule of Investments [Line Items] | ||||
| Total Assets | $ 1,264,856 | $ 1,175,793 | ||
| Stockholder's equity - trust common securities | 261,919 | 270,495 | 278,547 | 287,731 |
| Total liabilities and stockholders' equity | 1,264,856 | 1,175,793 | ||
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Preferred Junior Subordinated Debentures [Member]
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| Schedule of Investments [Line Items] | ||||
| Non-current assets-junior subordinated debentures | 111,680 | |||
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Common Junior Subordinated Debentures [Member]
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| Schedule of Investments [Line Items] | ||||
| Non-current assets-junior subordinated debentures | 3,261 | |||
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Trust Preferred Securities [Member]
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| Schedule of Investments [Line Items] | ||||
| Non-current liabilities - trust preferred securities | 111,680 | |||
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Common Trust Securities [Member]
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| Schedule of Investments [Line Items] | ||||
| Stockholder's equity - trust common securities | 3,261 | |||
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Trust Securities [Member]
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| Schedule of Investments [Line Items] | ||||
| Total liabilities and stockholders' equity | 114,941 | |||
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Junior Subordinated Debentures [Member]
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| Schedule of Investments [Line Items] | ||||
| Total Assets | $ 114,941 |