Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Mar. 25, 2017	Mar. 26, 2016
Operating activities:
Net earnings	$ 29,527,000	$ 28,566,000
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation of fixed assets	18,431,000	16,761,000
Amortization of intangibles and deferred costs	2,279,000	2,909,000
Share-based compensation	1,429,000	1,055,000
Deferred income taxes	(323,000)	(139,000)
Loss on sale of marketable securities		406,000
Other	498,000	289,000
Changes in assets and liabilities net of effects from purchase of companies
Increase in accounts receivable	(7,940,000)	(285,000)
Increase in inventories	(10,866,000)	(18,128,000)
Decrease (increase) in prepaid expenses	9,464,000	(1,054,000)
Decrease in accounts payable and accrued liabilities	(1,737,000)	(2,079,000)
Net cash provided by operating activities	40,762,000	28,301,000
Investing activities:
Purchases of companies, net of cash acquired and debt assumed	(31,111,000)
Purchases of property, plant and equipment	(32,983,000)	(23,735,000)
Purchases of marketable securities	(23,726,000)	(31,286,000)
Proceeds from redemption and sales of marketable securities	5,104,000	5,384,000
Proceeds from disposal of property and equipment	964,000	835,000
Other	(163,000)	582,000
Net cash used in investing activities	(81,915,000)	(48,220,000)
Financing activities:
Payments to repurchase common stock	(1,682,000)	(11,758,000)
Proceeds from issuance of stock	3,218,000	1,984,000
Payments on capitalized lease obligations	(182,000)	(176,000)
Payment of cash dividend	(15,133,000)	(14,006,000)
Net cash used in financing activities	(13,779,000)	(23,956,000)
Effect of exchange rate on cash and cash equivalents	555,000	(477,000)
Net decrease in cash and cash equivalents	(54,377,000)	(44,352,000)
Cash and cash equivalents at beginning of period	140,652,000	133,689,000
Cash and cash equivalents at end of period	$ 86,275,000	$ 89,337,000