The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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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 before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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GOODWILL AND OTHER INTANGIBLE ASSETS - Intangible assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Intangible assets
Amortizing intangibles	$ 71,350		$ 71,350		$ 71,400
Accumulated amortization	(35,349)		(35,349)		(26,383)
Amortizing intangibles, net	36,001		36,001		45,017
Non-amortizing intangibles	1,006,247		1,006,247		989,068
Intangible, net	1,042,248		1,042,248		$ 1,034,085
Amortization of in intangible assets	$ 3,000	$ 3,000	$ 9,000	$ 8,900
Minimum
Intangible assets
Useful life of intangible assets			5 years
Maximum
Intangible assets
Useful life of intangible assets			7 years