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Fair Value Measurement - Fair Value of Company's Fixed Rate Senior Notes and Junior Subordinated Debentures (Parenthetical) (Detail) (Ten Point Eight Seven Five Percentage Notes [Member])
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Dec. 31, 2012
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Dec. 31, 2011
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Carrying Amount [Member]
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| Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] | ||
| Interest rate on senior Notes | 10.875% | 10.875% |
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Estimated Fair Value [Member]
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| Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] | ||
| Interest rate on senior Notes | 10.875% | 10.875% |
| X | ||||||||||
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- Details
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- Definition
Interest rate stated in the contractual debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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