Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jul. 01, 2017	Jul. 02, 2016
Cash Flows from Operating Activities
Net income	$ 19,514	$ 21,922
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Stock-based compensation	3,925	5,177
Excess tax benefits from stock-based compensation	(202)	(187)
Fair value adjustment to acquired inventory	7,975	0
Net periodic pension benefit cost	1,298	851
Depreciation and amortization	25,430	14,427
Amortization of debt issuance costs	2,698	141
Deferred income taxes	(4,399)	872
Bad debt provision (recovery), net	1,345	334
Changes in operating assets and liabilities
Accounts and unbilled contracts receivable	16,992	(7,853)
Inventories	(5,134)	(6,938)
Prepaid expenses	(2,071)	(2,745)
Accounts payable	(452)	4,759
Accrued payroll and related costs	(5,204)	2,798
Advance payments from customers	5,689	23,578
Accrued warranty costs	(232)	159
Other assets and liabilities	(14,763)	(11,555)
Net Cash Provided by (Used in) Operating Activities	52,409	45,740
Cash Flows from Investing Activities
Purchases of property and equipment	(13,239)	(16,194)
Proceeds from sale of property and equipment	45	1,514
Payments to Acquire Businesses, Net of Cash Acquired	(1,000)	0
(Increase) decrease in restricted cash	0	(43,500)
Net Cash Provided by (Used in) Investing Activities	(14,194)	(58,180)
Cash Flows from Financing Activities
Payment of long-term debt	(3,511)	0
Payment of debt issuance costs for long-term debt	(186)	(423)
Payment of debt component of tangible equity units	(6,351)	0
Payment of debt issuance costs for revolving credit facility	(49)	(110)
Proceeds from issuance of common stock, net of issuance costs	0	74,738
Proceeds from issuance of equity component of tangible equity units, net of issuance costs	0	84,824
Payment for capped call transaction	0	(7,935)
Proceeds from issuance of debt component of tangible equity units	0	27,386
Payment of debt issuance costs for debt component of tangible equity units	0	(872)
Receipts under short-term borrowings	0	20,000
Payments under short-term borrowings	0	(41,343)
Excess tax benefits from stock-based compensation	202	187
Cash dividends	(14,976)	(8,935)
Proceeds from exercise of stock options and employee stock purchase plan	5,580	3,796
Payments to purchase and retire common stock	(1,652)	(18,396)
Net Cash Provided by (Used in) Financing Activities	(20,943)	132,917
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(432)	468
Cash and Cash Equivalents
Increase (decrease) during the period	16,840	120,945
Balance, beginning of period	84,780	51,768
Balance, end of period	101,620	172,713
Cash paid during the period for
Interest, net	21,917	658
Income taxes, net	10,538	11,391
Non-cash investing and financing activities
Property and equipment acquired under capital lease	2,452	0
Dividends declared not yet paid recorded in accrued dividends	5,048	4,935
Common stock issuance costs not yet paid recorded in accounts payable and other accrued liabilities	0	437
Issuance costs on equity component of tangible equity units not yet paid recorded in accounts payable and other accrued liabilities	0	313
Debt issuance costs net yet paid recorded in accounts payable and other accrued liabilities	$ 0	$ 486