Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Oct. 27, 2012	Oct. 29, 2011
Operating Activities:
Net income	$ 26,409	$ 24,558
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,759	5,408
Deferred income tax benefit	(317)	(285)
Loss (gain) on disposal of property, net	44	(5)
Stock-based compensation	156	130
Changes in assets and liabilities:
Trade receivables	4,972	4,504
Inventories	(2,068)	(4,948)
Prepaid and other assets	(1,121)	(673)
Accounts payable	(15,120)	(6,492)
Accrued and other liabilities	(2,569)	(4,076)
Net cash provided by operating activities	16,145	18,121
Investing Activities:
Additions to property, plant and equipment	(3,226)	(3,783)
Proceeds from sale of property, plant and equipment	10	19
Net cash used in investing activities	(3,216)	(3,764)
Financing Activities:
Proceeds from stock options exercised	129	88
Stock-based tax benefits	22	126
Net cash provided by financing activities	151	214
Net Increase in Cash and Equivalents	13,080	14,571
Cash and Equivalents - Beginning of Year	35,626	7,372
Cash and Equivalents - End of Period	48,706	21,943
Other Cash Flow Information:
Interest paid	51	38
Income taxes paid	$ 13,046	$ 12,349