Schedule VI. Supplementary Insurance Information Concerning Property-Casualty Insurance Operations (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Supplemental Information for Property, Casualty Insurance Underwriters [Line Items]
Current year	$ 341,745	$ 315,241	$ 483,180
Prior years	(143,798)	(143,954)	(157,969)
Consolidated Subsidiaries
Supplemental Information for Property, Casualty Insurance Underwriters [Line Items]
Deferred Policy Acquisition Costs	110,059	81,684	52,622
Reserves for Unpaid Claims and Claim Adjustment Expenses	1,412,510	1,563,730	1,879,377
Discount, if any, Deducted	0	0	0
Unearned Premiums	512,386	477,888	399,517
Earned Premiums	1,062,416	1,114,626	1,069,355
Net Investment Income	124,316	208,028	165,725
Current year	341,745	315,241	483,180
Prior years	(143,798)	(143,954)	(157,969)
Amortization of Deferred Policy Acquisition Costs	144,476	125,501	113,542
Paid Claims and Claims Adjustment Expenses	314,836	395,447	226,671
Net Premiums Written	$ 1,068,236	$ 1,203,947	$ 1,102,657

Amount of amortization expense on deferred policy acquisition cost.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 235

-Section S99

-Paragraph 3

-Subparagraph (SX 210.12-18)

-URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e575016-122915

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 expense for claims incurred in the current reporting period and related claims settlement costs.

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

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The amount of discount that may be deducted from the reserve for unpaid claims and claims adjustment expense.

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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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Amount of expense for claims incurred in prior reporting periods and related claims settlement costs.

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

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