Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Mar. 28, 2015	Mar. 29, 2014
Operating activities:
Net earnings	$ 25,893,000	$ 25,947,000
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation of fixed assets	15,987,000	15,591,000
Amortization of intangibles and deferred costs	2,869,000	2,511,000
Share-based compensation	1,009,000	1,049,000
Deferred income taxes	14,000	(189,000)
Loss on sale of marketable securities	509,000	296,000
Other	(199,000)	(126,000)
Changes in assets and liabilities net of effects from purchase of companies
Decrease in accounts receivable	3,885,000	636,000
Increase in inventories	(10,448,000)	(5,106,000)
Increase in prepaid expenses	(1,918,000)	(633,000)
Decrease in accounts payable and accrued liabilities	(6,373,000)	(889,000)
Net cash provided by operating activities	31,228,000	39,087,000
Investing activities:
Payment for purchases of companies, net of cash acquired		(11,000,000)
Purchases of property, plant and equipment	(20,643,000)	(20,825,000)
Purchases of marketable securities	(13,136,000)	(25,747,000)
Proceeds from redemption and sales of marketable securities	13,601,000	6,060,000
Proceeds from disposal of property and equipment	862,000	815,000
Other	(56,000)	(92,000)
Net cash used in investing activities	(19,372,000)	(50,789,000)
Financing activities:
Payments to repurchase common stock	(2,114,000)
Proceeds from issuance of stock	2,070,000	1,023,000
Payments on capitalized lease obligations	(105,000)	(204,000)
Payment of cash dividend	(12,696,000)	(8,966,000)
Net cash used in financing activities	(12,845,000)	(8,147,000)
Effect of exchange rate on cash and cash equivalents	(2,156,000)	(195,000)
Net decrease in cash and cash equivalents	(3,145,000)	(20,044,000)
Cash and cash equivalents at beginning of period	91,760,000	97,345,000
Cash and cash equivalents at end of period	$ 88,615,000	$ 77,301,000