Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Cash Flows from Operating Activities
Net income	$ 41,589	$ 8,904
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Stock-based compensation	3,290	2,637
Fair value adjustment to acquired inventory	0	7,724
Net periodic pension benefit cost	597	856
Depreciation and amortization	17,348	16,832
Amortization of debt issuance costs	2,626	1,807
Deferred income taxes	(30,654)	(3,383)
Bad debt provision (recovery), net	1,201	890
Other	(111)	0
Changes in operating assets and liabilities
Accounts receivable and unbilled accounts receivable	24,174	15,233
Inventories, net	(14,441)	(1,925)
Prepaid expenses	(2,374)	(3,055)
Accounts payable	(901)	(3,627)
Accrued payroll and related costs	(11,921)	(6,319)
Advance payments from customers	5,891	14,437
Accrued warranty costs	157	(465)
Other assets and liabilities	787	(9,329)
Net Cash Provided by (Used in) Operating Activities	37,258	41,217
Cash Flows from Investing Activities
Purchases of property and equipment	(5,368)	(9,318)
Proceeds from sale of property and equipment	69	25
Other	823	0
Net Cash Provided by (Used in) Investing Activities	(4,476)	(9,293)
Cash Flows from Financing Activities
Payment of long-term debt	(45,949)	(2,300)
Payment of debt issuance costs for long-term debt	0	(186)
Payment of debt component of tangible equity units	(4,498)	(4,197)
Payment of debt issuance costs for revolving credit facility	0	(49)
Receipts under short-term borrowings	7,750	0
Payments under short-term borrowings	(7,750)	0
Cash dividends	(10,667)	(9,955)
Proceeds from exercise of stock options and employee stock purchase plan	745	1,672
Payments to purchase and retire common stock	(757)	(1,482)
Net Cash Provided by (Used in) Financing Activities	(61,126)	(16,497)
Effect of Exchange Rate Changes on Cash and Cash Equivalents	3,989	(2,774)
Cash and Cash Equivalents
Increase (decrease) during the period	(24,355)	12,653
Balance, beginning of period	108,733	84,780
Balance, end of period	84,378	97,433
Cash paid during the period for
Interest	11,314	15,197
Income taxes	4,954	9,379
Non-cash investing and financing activities
Property and equipment acquired under capital lease	67	0
Dividends declared not yet paid	$ 5,291	$ 5,021