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GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Excess purchase price over fair value of net assets acquired assigned to goodwill	$ 102,003	$ 102,003
Impairment charges		3,500
Minimum
Finite-Lived Intangible Assets [Line Items]
Economic useful life	2 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Economic useful life	13 years
MGA contract
Finite-Lived Intangible Assets [Line Items]
Impairment charges		$ 3,500
Novae
Finite-Lived Intangible Assets [Line Items]
Finite lived other intangible assets			$ 385,000
Value of business acquired - definite lived intangible asset			257,000
Indefinite lived intangible assets			95,000
Excess purchase price over fair value of net assets acquired assigned to goodwill			54,000
Novae | Distribution networks
Finite-Lived Intangible Assets [Line Items]
Finite lived other intangible assets			128,000
Contessa Limited
Finite-Lived Intangible Assets [Line Items]
Excess purchase price over fair value of net assets acquired assigned to goodwill			$ 1,000

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- Definition

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles, Value Of Business Acquired

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Amount of assets, excluding financial assets and goodwill, that lack physical substance, having a projected indefinite period of benefit, acquired at the acquisition date.

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The amount of identifiable intangible assets recognized as of the acquisition date.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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