Condensed Consolidated Statements of Cash Flows (USD $) In Thousands	3 Months Ended
	Jul. 30, 2011	Jul. 31, 2010
Cash Flows From Operating Activities:
Net income	$ 13,435	$ 12,053
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,725	2,784
Deferred income tax benefit	(134)	(104)
Gain on disposal of property, net	(2)	(6)
Stock-based compensation	106	106
Changes in assets and liabilities:
Trade receivables	(1,464)	(785)
Inventories	(6,383)	541
Prepaid and other assets	(618)	242
Accounts payable	3,052	(4,775)
Accrued and other liabilities	4,057	5,809
Net cash provided by operating activities	14,774	15,865
Cash Flows From Investing Activities:
Additions to property, plant and equipment	(1,805)	(1,303)
Proceeds from sale of property, plant and equipment	11	10
Net cash used in investing activities	(1,794)	(1,293)
Cash Flows From Financing Activities:
Proceeds from stock options exercised	58
Stock-based tax benefits	113	2
Net cash provided by financing activities	171	2
Net Increase in Cash and Equivalents	13,151	14,574
Cash and Equivalents - Beginning of Year	7,372	68,566
Cash and Equivalents - End of Period	20,523	83,140
Other Cash Flow Information:
Interest paid	19	33
Income taxes paid	$ 474	$ 910