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Statutory Financial Information and Accounting Policies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| Insurance [Abstract] | |||
| Capital and surplus of the Insurance Companies | $ 96.6 | $ 95.0 | |
| Statutory net income (loss) of the Insurance Companies | 1.0 | 4.2 | (12.7) |
| Maximum dividends to be paid as a percentage of statutory capital and surplus without the prior approval of the Texas insurance commissioner | 10.00% | ||
| Ordinary dividends received | $ 2.0 | ||