Significant Accounting Policies Major Components of Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Raw materials and purchased components	$ 425,200	$ 344,600
Service parts, garments and accessories	358,400	357,000
Finished goods	513,500	476,200
Less: reserves	(62,300)	(56,700)
Inventories	$ 1,234,800	$ 1,121,100