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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Intangible Assets - Additional Information (Details) - USD ($)	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Impairment of goodwill				$ 0
Amortization of expense of intangibles	$ 6,300,000	$ 18,778,000	$ 0
Aegerion
Finite-Lived Intangible Assets [Line Items]
Impairment of purchased intangibles		$ 0