Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2018	Jul. 01, 2017
Cash Flows from Operating Activities
Net income	$ 50,568	$ 19,514
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Stock-based compensation	5,378	3,925
Fair value adjustment to acquired inventory	0	7,975
Net periodic pension benefit cost	890	1,298
Depreciation and amortization	25,858	25,430
Amortization of debt issuance costs	3,824	2,698
Deferred income taxes	(30,189)	(4,399)
Bad debt provision (recovery), net	1,344	1,345
Other	(111)	0
Changes in operating assets and liabilities
Accounts receivable and unbilled accounts receivable	22,915	16,992
Inventories, net	(15,158)	(5,134)
Prepaid expenses	(784)	(2,071)
Accounts payable	(283)	(452)
Accrued payroll and related costs	(10,525)	(5,204)
Advance payments from customers	1,987	5,689
Accrued warranty costs	(422)	(232)
Other assets and liabilities	(3,181)	(14,763)
Net Cash Provided by (Used in) Operating Activities	52,111	52,611
Cash Flows from Investing Activities
Purchases of property and equipment	(9,777)	(13,239)
Proceeds from sale of property and equipment	69	45
Purchases of business	0	(1,000)
Other	823	0
Net Cash Provided by (Used in) Investing Activities	(8,885)	(14,194)
Cash Flows from Financing Activities
Payment of long-term debt	(63,233)	(3,511)
Payment of debt issuance costs for long-term debt	0	(186)
Payment of debt component of tangible equity units	(6,805)	(6,351)
Payment of debt issuance costs for revolving credit facility	0	(49)
Receipts under short-term borrowings	12,750	0
Payments under short-term borrowings	(12,750)	0
Cash dividends	(15,958)	(14,976)
Proceeds from exercise of stock options and employee stock purchase plan	1,701	5,580
Payments to purchase and retire common stock	(1,306)	(1,652)
Net Cash Provided by (Used in) Financing Activities	(85,601)	(21,145)
Effect of Exchange Rate Changes on Cash and Cash Equivalents	45	(432)
Cash and Cash Equivalents
Increase (decrease) during the period	(42,330)	16,840
Balance, beginning of period	108,733	84,780
Balance, end of period	66,403	101,620
Cash paid during the period for
Interest	16,768	21,917
Income taxes	7,645	10,538
Non-cash investing and financing activities
Property and equipment acquired under capital lease	138	2,452
Dividends declared not yet paid	$ 5,354	$ 5,048