Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Jun. 25, 2016	Jun. 27, 2015
Operating activities:
Net earnings	$ 55,357,000	$ 50,355,000
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation of fixed assets	25,526,000	24,013,000
Amortization of intangibles and deferred costs	4,304,000	4,445,000
Share-based compensation	1,735,000	1,625,000
Deferred income taxes	(172,000)	(131,000)
Loss on sale of marketable securities	582,000	1,904,000
Other	493,000	(255,000)
Changes in assets and liabilities net of effects from purchase of companies
Increase in accounts receivable	(11,984,000)	(15,821,000)
Increase in inventories	(12,478,000)	(8,052,000)
Decrease (increase) in prepaid expenses	1,419,000	(511,000)
Increase in accounts payable and accrued liabilities	6,566,000	8,980,000
Net cash provided by operating activities	71,348,000	66,552,000
Investing activities:
Payment for purchases of companies, net of cash acquired		(615,000)
Purchases of property, plant and equipment	(37,221,000)	(34,180,000)
Purchases of marketable securities	(41,786,000)	(16,126,000)
Proceeds from Sale and Maturity of Marketable Securities	11,008,000	39,968,000
Proceeds from disposal of property and equipment	1,578,000	1,322,000
Other	308,000	(167,000)
Net cash used in investing activities	(66,113,000)	(9,798,000)
Financing activities:
Payments to repurchase common stock	(15,265,000)	(2,114,000)
Proceeds from issuance of stock	3,634,000	2,174,000
Payments on capitalized lease obligations	(265,000)	(176,000)
Payment of cash dividend	(21,267,000)	(19,425,000)
Net cash used in financing activities	(33,163,000)	(19,541,000)
Effect of exchange rate on cash and cash equivalents	(1,440,000)	(2,425,000)
Net (decrease) increase in cash and cash equivalents	(29,368,000)	34,788,000
Cash and cash equivalents at beginning of period	133,689,000	91,760,000
Cash and cash equivalents at end of period	$ 104,321,000	$ 126,548,000