Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jul. 29, 2017	Jul. 30, 2016
Operating Activities:
Net income	$ 38,272	$ 28,995
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	3,531	3,102
Deferred income tax provision (benefit)	108	(64)
Loss (gain) on disposal of property, net	6	(6)
Stock-based compensation	41	49
Stock-based tax benefits		28
Changes in assets and liabilities:
Trade receivables	(14,819)	(14,788)
Inventories	(3,971)	(3,897)
Prepaid and other assets	(656)	(192)
Accounts payable	(3,761)	(1,865)
Accrued and other liabilities	24,791	19,088
Net cash provided by operating activities	43,542	30,450
Investing Activities:
Additions to property, plant and equipment	(4,054)	(3,495)
Proceeds from sale of property, plant and equipment	9	15
Net cash used in investing activities	(4,045)	(3,480)
Financing Activities:
Proceeds from stock options exercised	46	29
Net cash provided by financing activities	46	29
Net Increase in Cash and Equivalents	39,543	26,999
Cash and Equivalents - Beginning of Period	136,372	105,577
Cash and Equivalents - End of Period	175,915	132,576
Other Cash Flow Information:
Interest paid	25	127
Income taxes paid	$ 648	$ 1,066