Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Operating activities:
Net earnings	$ 17,526,000	$ 36,249,000
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation of fixed assets	10,774,000	11,152,000
Amortization of intangibles and deferred costs	861,000	834,000
Share-based compensation	972,000	953,000
Deferred income taxes	689,000	(18,265,000)
Loss (gain) on marketable securities	1,027,000	(8,000)
Other	82,000	(317,000)
Changes in assets and liabilities net of effects from purchase of companies
Decrease in accounts receivable	14,386,000	14,547,000
Increase in inventories	(4,974,000)	(9,933,000)
Decrease in prepaid expenses	340,000	111,000
Decrease in accounts payable and accrued liabilities	(8,872,000)	(9,216,000)
Net cash provided by operating activities	32,811,000	26,107,000
Investing activities:
Purchases of property, plant and equipment	(11,837,000)	(14,623,000)
Purchases of marketable securities	(17,513,000)	(30,865,000)
Proceeds from redemption and sales of marketable securities	17,125,000	19,096,000
Proceeds from disposal of property and equipment	577,000	1,046,000
Other	(236,000)	27,000
Net cash used in investing activities	(11,884,000)	(25,319,000)
Financing activities:
Proceeds from issuance of stock	1,704,000	253,000
Payments on capitalized lease obligations	(83,000)	(90,000)
Payment of cash dividend	(8,438,000)	(7,838,000)
Net cash used in financing activities	(6,817,000)	(7,675,000)
Effect of exchange rate on cash and cash equivalents	(875,000)	(2,986,000)
Net increase (decrease) in cash and cash equivalents	13,235,000	(9,873,000)
Cash and cash equivalents at beginning of period	111,479,000	90,962,000
Cash and cash equivalents at end of period	$ 124,714,000	$ 81,089,000