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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

X

- 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

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X

- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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