Schedule VI - Supplemental Information Concerning Property-Casualty Insurance Operations (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Supplemental Information concerning Property - Casualty Insurance Operations [Abstract]
Deferred Policy Acquisition Cost	$ 18,419	$ 16,578	$ 15,137
Reserves for Unpaid Loss and Loss Adjustment Expenses	570,450	538,214	532,204
Unearned Premium	140,528	118,699	111,494
Earned Premium	290,689	251,015	218,881
Net investment Income	27,018	26,340	26,242
Provision for loss and LAE for claims occurring in the current year, net of reinsurance	222,393	196,269	179,022
Loss and LAE Related to Prior Periods	(2,490)	(6,563)	(21,634)
Amortization of Deferred Policy Acquisition Costs	(39,120)	(34,623)	(29,083)
Paid Claims and Claim Adjustment Expenses	181,920	179,097	164,940
Net Premiums Written	$ 312,518	$ 258,220	$ 207,875

Amount of provision in the period for claims incurred in the reporting period and related claims settlement costs.

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

-Publisher SEC

-Name Financial Reporting Release (FRR)

-Number 403

-Paragraph 04

-Subparagraph b

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 40

-Section 50

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-Publisher AICPA

-Name Statement of Position (SOP)

-Number 94-5

-Paragraph 11

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Amount of provision in the period for claims incurred in prior reporting periods and related claims settlement costs.

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Amount of amortization expense on deferred policy acquisition cost.

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

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 18

-Article 12

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Amount of deferred policy acquisition cost related to property-casualty insurance policy written.

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Amount of property-casualty insurance premium revenue earned on insurance policies.

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Amount of net investment income earned by property-casualty insurance underwriter.

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Payments of claims and claims adjustment expenses during the period of a property-casualty insurance entity.

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Amount of actual premium written by property-casualty insurance underwriter.

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The amount of reserve, policy claim payable and loss expense incurred by property-casualty insurance underwriter.

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Amount of property-casualty insurance premium revenue not yet earned on insurance policies.

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