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Investments - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2014 Real Estate Investment [Member] | Mar. 31, 2013 Real Estate Investment [Member] | Mar. 31, 2014 U.S. Treasury and U.S. Government Agencies [Member] | Dec. 31, 2013 U.S. Treasury and U.S. Government Agencies [Member]
Schedule of Investments [Line Items] |  |  |  |
Statutory deposit held in trust with Treasurer of Alabama |  |  | $ 108 | $ 105
Depreciation and amortization expenses under other investments | $ 98 | $ 95 |  |

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- Definition Carrying amount of cash and investment securities on deposit with state regulatory authorities in connection with capital requirements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 320 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=28366721&loc=d3e22002-158495 + Details
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