Significant Accounting Policies Major Components of Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Raw materials and purchased components	$ 147,673	$ 141,566
Service parts, garments and accessories	318,378	316,383
Finished goods	411,383	333,760
Less: reserves	(61,444)	(45,175)
Inventories	$ 815,990	$ 746,534