Goodwill and Intangible Assets - Useful Lives of Intangibles (Details)	3 Months Ended
	Mar. 31, 2019
Product acquisition costs
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	10 years
Trademarks and Technology
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	15 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	10 years