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Commitments and Contingencies - Legal Proceedings (Details) $ in Thousands		9 Months Ended
	Mar. 09, 2015 USD ($)	Sep. 30, 2019 USD ($)	Aug. 31, 2019 action
Loss Contingencies [Line Items]
Stockholder derivative actions \| action			3
NY Lanham Act Litigation \| Minimum
Loss Contingencies [Line Items]
Damages sought	$ 250,000
Milbeck Federal Securities Litigation \| Pending
Loss Contingencies [Line Items]
Agreement to settle		$ 28,250
Proposed settlement amount		28,250
Insurance receivable		$ 28,250