Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
Jan. 28, 2012	Jan. 29, 2011
Cash Flows From Operating Activities:
Net income	$ 32,462	$ 29,667
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7,963	8,867
Deferred income tax benefit	(391)	(311)
(Gain) loss on disposal of property, net	(12)	3
Stock-based compensation	224	355
Changes in assets and liabilities:
Trade receivables	5,726	9,564
Inventories	(4,805)	819
Prepaid and other assets	(1,157)	(280)
Accounts payable	(12,346)	(13,117)
Accrued and other liabilities	(9,163)	776
Net cash provided by operating activities	18,501	36,343
Cash Flows From Investing Activities:
Additions to property, plant and equipment	(6,172)	(7,502)
Proceeds from sale of property, plant and equipment	29	27
Net cash used in investing activities	(6,143)	(7,475)
Cash Flows From Financing Activities:
Proceeds from stock options exercised	100	189
Stock-based tax benefits	131	208
Net cash provided by financing activities	231	397
Net Increase in Cash and Equivalents	12,589	29,265
Cash and Equivalents - Beginning of Year	7,372	68,566
Cash and Equivalents - End of Period	19,961	97,831
Other Cash Flow Information:
Interest paid	82	71
Income taxes paid	$ 17,153	$ 16,702

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Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation).