Additional contractual commitments

No definition available.

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- Definition

Amount of accumulated pre-tax unrealized loss on securities classified as available-for-sale that have been in a loss position for twelve months or longer impacting investments.

+ References

No definition available.

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- Definition

Amount of accumulated pre-tax unrealized loss on securities classified as available-for-sale impacting investments.

+ References

No definition available.

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- Definition

Amount of accumulated pre-tax unrealized loss on investments in available-for-sale securities that have been in a loss position for less than twelve months impacting investments.

+ References

No definition available.

+ Details

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- Definition

Limited partnership financial reporting lag time, months.

+ References

No definition available.

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- Definition

Percentage threshold that triggers a review of available for sale debt securities for declines in market value.

+ References

No definition available.

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- Definition

Investments in notes or bonds that are collateralized by a specific group of underlying assets owned by the issuer of the notes or bonds which are short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash Equivalents
-URI http://asc.fasb.org/extlink&oid=6507016

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- Definition

This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
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-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611

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- Definition

Amount of gain (loss) on sale or disposal of an equity method investment.

+ References

No definition available.

+ Details

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- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
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-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Investments (Narrative) (Details) - USD ($) $ in Thousands		12 Months Ended
Investments (Narrative) (Details) - USD ($) $ in Thousands	Jul. 13, 2015	Dec. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Percentage threshold that triggers a review of available for sale debt securities for declines in market value		80.00%
Aggregate market value of investments in unrealized loss position		$ 2,571,006	$ 1,892,146
Gross unrealized losses on investments in unrealized loss position		100,332	90,458
Fixed maturity securities, duration of unrealized loss, less than 12 months, gross unrealized depreciation		62,697	72,254
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation		37,635	$ 18,204
Additional contractual commitments		321,999
Securities with a carrying value		1,398,874
Realized gain on sale of subsidiary		$ 94,704
Sales Revenue, Net [Member]
Schedule of Available-for-sale Securities [Line Items]
Percentage threshold of unrealized losses not exceeded by any one single issuer		0.07%	0.30%
Minimum [Member]
Schedule of Available-for-sale Securities [Line Items]
Limited partnership financial reporting lag time, months		1 month
Maximum [Member]
Schedule of Available-for-sale Securities [Line Items]
Limited partnership financial reporting lag time, months		3 months
Maximum [Member] \| Sales Revenue, Net [Member]
Schedule of Available-for-sale Securities [Line Items]
Percentage threshold of unrealized losses not exceeded by any one single issuer		5.00%
Parent Company [Member]
Schedule of Available-for-sale Securities [Line Items]
Realized gain on sale of subsidiary		$ 94,704
Mt. Mckinley Insurance Company [Member]
Schedule of Available-for-sale Securities [Line Items]
purchase price	$ 20,156
Realized gain on sale of subsidiary	$ 94,704
Investment Grade [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation			$ 16,680
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Aggregate market value of investments in unrealized loss position		2,571,006	1,892,146
Gross unrealized losses on investments in unrealized loss position		100,332	90,458
Fixed maturity securities, duration of unrealized loss, less than 12 months, gross unrealized depreciation		62,697	72,254
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation		37,635	18,204
Energy Sector [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, duration of unrealized loss, less than 12 months, gross unrealized depreciation		35,978	53,772
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation		6,959
Foreign Exchange Losses [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, duration of unrealized loss, less than 12 months, gross unrealized depreciation		6,090	$ 7,298
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation		$ 14,807