Significant Accounting Policies Major Components of Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Raw materials and purchased components	$ 159,820	$ 141,566
Service parts, garments and accessories	305,884	316,383
Finished goods	403,361	333,760
Less: reserves	(68,454)	(45,175)
Inventories	$ 800,611	$ 746,534