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Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Summarized financial information for these segments
Insurance premiums and contract charges earned	$ 169,158	$ 165,504
Net investment income	77,403	75,675
Net income (loss)	27,012	26,671
Assets	8,457,354		8,167,726
Property and casualty [Member]
Summarized financial information for these segments
Insurance premiums and contract charges earned	137,936	135,046
Net investment income	8,970	8,872
Net income (loss)	10,160	13,231
Assets	1,018,363		1,016,368
Annuity [Member]
Summarized financial information for these segments
Insurance premiums and contract charges earned	5,072	4,965
Net investment income	51,354	49,540
Net income (loss)	11,061	11,588
Assets	5,624,351		5,380,780
Life [Member]
Summarized financial information for these segments
Insurance premiums and contract charges earned	26,150	25,493
Net investment income	17,319	17,512
Net income (loss)	4,340	5,165
Assets	1,718,125		1,663,696
Corporate and other [Member]
Summarized financial information for these segments
Net investment income
Net income (loss)	1,451	(3,313)
Assets	123,282		131,449
Intersegment eliminations [Member]
Summarized financial information for these segments
Net investment income	(240)	(249)
Assets	$ (26,767)		$ (24,567)

X

- Definition

The sum of insurance premiums earned, premiums earned on the income statement for all insurance and reinsurance contracts after subtracting any amounts ceded to another insurer and adding premiums assumed from other insurers, and contract charges earned on investment and universal life-type contracts.

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 12

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-Name Statement of Financial Accounting Concepts (CON)

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

-Publisher SEC

-Name Regulation S-X (SX)

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-Name Accounting Standards Codification

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

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-Number 210

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Reference 8: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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-Publisher FASB

-Name Emerging Issues Task Force (EITF)

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-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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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 28, 29, 30

-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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-Publisher AICPA

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+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 16

-Article 12



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 225

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