Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Apr. 27, 2013	Apr. 28, 2012	Apr. 30, 2011
Operating Activities:
Net income	$ 46,920,000	$ 43,993,000	$ 40,754,000
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	11,002,000	10,651,000	11,356,000
Deferred income tax provision (benefit)	172,000	(477,000)	(694,000)
Loss on disposal of property, net	63,000	7,000	82,000
Stock-based compensation	230,000	290,000	446,000
Changes in assets and liabilities:
Trade receivables	(2,478,000)	(5,679,000)	(2,078,000)
Inventories	1,628,000	(7,509,000)	1,319,000
Prepaid and other assets	(2,466,000)	(2,239,000)	(1,215,000)
Accounts payable	(10,614,000)	5,618,000	829,000
Accrued and other liabilities	(4,193,000)	(6,959,000)	4,503,000
Net cash provided by operating activities	40,264,000	37,696,000	55,302,000
Investing Activities:
Additions to property, plant and equipment	(9,693,000)	(9,905,000)	(11,389,000)
Proceeds from sale of property, plant and equipment	77,000	53,000	77,000
Net cash used in investing activities	(9,616,000)	(9,852,000)	(11,312,000)
Financing Activities:
Dividends paid on common stock	(118,139,000)		(106,314,000)
Dividends paid on preferred stock	(12,000)
Borrowings under credit facilities, net	50,000,000
Proceeds from issuance of preferred stock, net	19,704,000
Proceeds from stock options exercised	239,000	115,000	209,000
Stock-based tax benefits	201,000	295,000	921,000
Net cash (used in) provided by financing activities	(48,007,000)	410,000	(105,184,000)
Net (Decrease) Increase in Cash and Equivalents	(17,359,000)	28,254,000	(61,194,000)
Cash and Equivalents - Beginning of Year	35,626,000	7,372,000	68,566,000
Cash and Equivalents - End of Year	18,267,000	35,626,000	7,372,000
Other Cash Flow Information:
Interest paid	341,000	95,000	101,000
Income taxes paid	$ 24,327,000	$ 23,127,000	$ 20,816,000