Schedule VI. Supplementary Insurance Information Concerning Property-Casualty Insurance Operations (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Information for Property, Casualty Insurance Underwriters [Line Items]
Current year	$ 610,685	$ 341,745	$ 315,241
Prior years	(162,447)	(143,798)	(143,954)
Consolidated Subsidiaries
Supplemental Information for Property, Casualty Insurance Underwriters [Line Items]
Deferred Policy Acquisition Costs	199,380	110,059	81,684
Reserves for Unpaid Claims and Claim Adjustment Expenses	2,767,045	1,412,510	1,563,730
Discount, if any, Deducted	0	0	0
Unearned Premiums	889,102	512,386	477,888
Earned Premiums	1,400,551	1,062,416	1,114,626
Net Investment Income	152,567	124,316	208,028
Current year	610,685	341,745	315,241
Prior years	(162,447)	(143,798)	(143,954)
Amortization of Deferred Policy Acquisition Costs	238,592	144,476	125,501
Paid Claims and Claims Adjustment Expenses	555,652	314,836	395,447
Net Premiums Written	$ 1,416,183	$ 1,068,236	$ 1,203,947

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

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

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