INVESTMENTS - Disposition of Fixed Securities and Equities (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Debt securities \| Available for sale securities \| SALES
Summary of the disposition of fixed maturities and equities
Proceeds From Sales	$ 436,680	$ 342,308	$ 173,694
Gross Realized Gains	14,691	7,208	3,561
Gross Realized Losses	(4,067)	(3,664)	(2,597)
Marketable Securities, Realized Gain (Loss), Excluding Other than Temporary Impairments, Total	10,624	3,544	964
Debt securities \| Available for sale securities \| CALLS/MATURITIES
Summary of the disposition of fixed maturities and equities
Proceeds From Sales	156,980	101,517	224,620
Gross Realized Gains	217	414	379
Gross Realized Losses	(9)	(3)	(5)
Marketable Securities, Realized Gain (Loss), Excluding Other than Temporary Impairments, Total	208	411	374
Debt securities \| Held-to-maturity Securities \| SALES
Summary of the disposition of fixed maturities and equities
Proceeds From Sales		654
Gross Realized Gains		4
Marketable Securities, Realized Gain (Loss), Excluding Other than Temporary Impairments, Total		4
Debt securities \| Held-to-maturity Securities \| CALLS/MATURITIES
Summary of the disposition of fixed maturities and equities
Proceeds From Sales			11,090
Gross Realized Gains			9
Marketable Securities, Realized Gain (Loss), Excluding Other than Temporary Impairments, Total			9
Debt securities \| Trading \| CALLS/MATURITIES
Summary of the disposition of fixed maturities and equities
Proceeds From Sales			1
Equity securities \| SALES
Summary of the disposition of fixed maturities and equities
Proceeds From Sales	53,110	72,869	73,982
Gross Realized Gains	25,985	29,794	21,542
Gross Realized Losses	(3,878)	(326)	(9)
Marketable Securities, Realized Gain (Loss), Excluding Other than Temporary Impairments, Total	$ 22,107	$ 29,468	$ 21,533

Line items represent reporting 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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 12
-Sentence Column A

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- Definition

The difference between the carrying value and the sale price of an investment. A gain would be recognized when the sale price of the investment is greater than the carrying value of the investment. This element refers to the Gain included in earnings and not to the cash proceeds of the sale.

+ References

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The difference between the carrying value and the sale price of an investment. A loss would be recognized when the sale price of the investment is less than the carrying value of the investment. This element refers to the Loss included in earnings and not to the cash proceeds of the sale.

+ References

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The cash inflow associated with the sale, maturity and collection of all investments such as debt, security and so forth during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585

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