Intangible Assets - Minimum Royalty Payments - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	9 Months Ended
	Nov. 30, 2018	Sep. 30, 2019
Intangible Assets
Total remaining minimum royalty payments due		$ 537,000
2018		132,000
2019		135,000
2020		135,000
2021		135,000
Fair Value of royalty payments		$ 482,300
Discounted cash flow rate		5.70%
Interest expense recognized		$ 54,700
Interest expense recognized, relating to royalty payments, prior to third amendment	$ 19,281
Amortization expense recognized prior to third amendment	$ 107,662