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SELECTED FINANCIAL STATEMENT INFORMATION (Inventories) (Details) - USD ($)
$ in Thousands
Apr. 30, 2017
Oct. 31, 2016
Inventory [Line Items]    
Finished products $ 163,471 $ 131,008
Work in process 39,163 36,076
Materials, parts, assemblies and supplies 119,921 117,153
Contracts in process 4,198 3,253
Less: Billings to date (1,092) (1,188)
Inventories, net of valuation reserves $ 325,661 $ 286,302