Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Cash Flows from Operating Activities
Net income	$ 33,151	$ 1,705
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Stock-based compensation	1,622	1,721
Fair value adjustment to acquired inventory	0	7,724
Net periodic pension benefit cost	292	433
Depreciation and amortization	8,736	8,392
Amortization of debt issuance costs	1,310	907
Deferred income taxes	(30,352)	(1,823)
Bad debt provision (recovery), net	432	554
Changes in operating assets and liabilities
Accounts receivable and unbilled accounts receivable	7,248	13,788
Inventories, net	(5,498)	227
Prepaid expenses	(3,810)	(2,908)
Accounts payable	1,167	130
Accrued payroll and related costs	(13,929)	(12,586)
Advance payments from customers	2,947	15,252
Accrued warranty costs	(190)	(297)
Other assets and liabilities	6,097	(4,287)
Net Cash Provided by (Used in) Operating Activities	9,223	28,932
Cash Flows from Investing Activities
Purchases of property and equipment	(2,801)	(4,654)
Proceeds from sale of property and equipment	69	25
Net Cash Provided by (Used in) Investing Activities	(2,732)	(4,629)
Cash Flows from Financing Activities
Payment of long-term debt	(19,667)	(1,150)
Payment of debt issuance costs for long-term debt	0	(186)
Payment of debt component of tangible equity units	(2,230)	(2,080)
Payment of debt issuance costs for revolving credit facility	0	(49)
Receipts under short-term borrowings	5,000	0
Cash dividends	(5,330)	(5,003)
Proceeds from exercise of stock options and employee stock purchase plan	212	652
Payments to purchase and retire common stock	(744)	(922)
Net Cash Provided by (Used in) Financing Activities	(22,759)	(8,738)
Effect of Exchange Rate Changes on Cash and Cash Equivalents	1,606	(4,396)
Cash and Cash Equivalents
Increase (decrease) during the period	(14,662)	11,169
Balance, beginning of period	108,733	84,780
Balance, end of period	94,071	95,949
Cash paid during the period for
Interest	5,784	10,436
Income taxes	2,323	5,984
Non-cash investing and financing activities
Property and equipment acquired under capital lease	67	0
Dividends declared not yet paid	$ 5,285	$ 4,953