Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Apr. 29, 2017	Apr. 30, 2016	May 02, 2015
Operating Activities:
Net income	$ 107,045,000	$ 61,198,000	$ 49,311,000
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	12,834,000	12,056,000	11,580,000
Deferred income tax provision (benefit)	1,358,000	(1,299,000)	1,076,000
Loss (gain) on disposal of property, net	72,000	129,000	(1,188,000)
Stock-based compensation	208,000	228,000	307,000
Changes in assets and liabilities:
Trade receivables	(10,273,000)	(1,095,000)	(1,746,000)
Inventories	(5,433,000)	(4,998,000)	990,000
Prepaid and other assets	(2,205,000)	(485,000)	(605,000)
Accounts payable	8,709,000	4,495,000	(710,000)
Accrued and other liabilities	1,457,000	8,726,000	(995,000)
Net cash provided by operating activities	113,772,000	78,955,000	58,020,000
Investing Activities:
Additions to property, plant and equipment	(14,015,000)	(12,140,000)	(11,630,000)
Proceeds from sale of property, plant and equipment	28,000	116,000	1,905,000
Net cash used in investing activities	(13,987,000)	(12,024,000)	(9,725,000)
Financing Activities:
Dividends paid on common stock	(69,850,000)
Dividends paid on preferred stock		(186,000)	(239,000)
Repayments under credit facilities, net		(10,000,000)	(20,000,000)
Redemption of preferred stock		(6,000,000)	(6,000,000)
Proceeds from stock options exercised	365,000	848,000	228,000
Stock-based tax benefits	495,000	1,528,000	240,000
Net cash used in financing activities	(68,990,000)	(13,810,000)	(25,771,000)
Net Increase in Cash and Equivalents	30,795,000	53,121,000	22,524,000
Cash and Equivalents - Beginning of Year	105,577,000	52,456,000	29,932,000
Cash and Equivalents - End of Year	136,372,000	105,577,000	52,456,000
Other Cash Flow Information:
Interest paid	202,000	116,000	380,000
Income taxes paid	$ 55,901,000	$ 29,473,000	$ 24,745,000