Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Apr. 27, 2019	Apr. 28, 2018	Apr. 29, 2017
Operating Activities:
Net income	$ 140,853,000	$ 149,774,000	$ 107,045,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	15,439,000	13,226,000	12,834,000
Deferred income tax provision	3,351,000	676,000	1,358,000
Loss on disposal of property, net	12,000	149,000	72,000
Stock-based compensation	251,000	161,000	208,000
Stock-based tax benefits			495,000
Changes in assets and liabilities:
Trade receivables	(481,000)	(13,041,000)	(10,273,000)
Inventories	(9,782,000)	(7,565,000)	(5,433,000)
Prepaid and other assets	(2,806,000)	(5,437,000)	(2,205,000)
Accounts payable	(8,651,000)	16,753,000	8,709,000
Accrued and other liabilities	1,256,000	25,000	1,457,000
Net cash provided by operating activities	139,442,000	154,721,000	114,267,000
Investing Activities:
Additions to property, plant and equipment	(38,333,000)	(31,974,000)	(14,015,000)
Proceeds from sale of property, plant and equipment	18,000	63,000	28,000
Net cash used in investing activities	(38,315,000)	(31,911,000)	(13,987,000)
Financing Activities:
Dividends paid on common stock	(135,247,000)	(69,878,000)	(69,850,000)
Proceeds from stock options exercised	456,000	560,000	365,000
Net cash used in financing activities	(134,791,000)	(69,318,000)	(69,485,000)
Net (Decrease) Increase in Cash and Equivalents	(33,664,000)	53,492,000	30,795,000
Cash and Equivalents - Beginning of Year	189,864,000	136,372,000	105,577,000
Cash and Equivalents - End of Year	156,200,000	189,864,000	136,372,000
Other Cash Flow Information:
Interest paid	51,000	101,000	202,000
Income taxes paid	$ 36,833,000	$ 56,737,000	$ 55,901,000