Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0000792987 (http://www.sec.gov/CIK)

Inventories [Abstract]	Period [Axis]
	2016-01-01 - 2016-12-31
Inventories [Abstract]
Inventories	Inventories consist of the following:     December 31       2016     2015   Raw materials and parts   $ 137,763     $ 141,967   Work-in-process     115,613       113,859   Finished goods     84,898       104,879   Used equipment     22,130       24,071   Total   $ 360,404     $ 384,776