Acquisitions Radar (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Oct. 31, 2014	Jul. 31, 2015	Apr. 28, 2015	Sep. 30, 2014
Business Acquisition [Line Items]
Intangible assets		$ 25,219
Radar Industries [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 57,874
Business Combinations, Recognized Identifiable Assts Acquired And Liabilities Assumed, Net of Cash Acquired				$ 57,799
Business Combinations, Recognized Identifiable Assets Acquired And Liabilities Assumed, Cash In Escrow		4,500		$ 6,500
Escrow Deposits Disbursements, Funds Returned to Seller		509
Escrow Deposit Disbursements, Funds Returned to Company		1,296
Escrow Deposit Disbursements, Funds Returned to Company As a Reduction to Purchase Price		$ 195
Cash and cash equivalents			$ 75
Accounts receivable			14,374
Inventory			15,729
Prepaid assets and other			95
Property, plant and equipment			26,612
Goodwill			12,989
Intangible assets			6,090
Accounts payable and other			(18,285)
Net assets acquired			$ 57,679