Significant Accounting Policies Major Components of Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Raw materials and purchased components	$ 402,300	$ 344,600
Service parts, garments and accessories	316,600	357,000
Finished goods	376,900	476,200
Less: reserves	(69,400)	(56,700)
Inventories	$ 1,026,400	$ 1,121,100