CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Oct. 28, 2017	Oct. 29, 2016
Cash flows from operating activities
Net income	$ 34,950	$ 35,113
Adjustments to reconcile net income to cash provided by (used for) operating activities
Gain on disposal of assets	(1,884)	(62)
Gain on conversion of investment	(2,204)
Deferred income tax expense	(403)	1,089
Provision for doubtful accounts	74	(18)
Depreciation and amortization	15,869	13,999
Equity-based compensation expense	6,410	5,880
Pension plan contributions	(2,000)	(2,300)
Change in receivables	6,165	784
Change in inventories	(4,096)	(3,747)
Change in other assets	(7,935)	(1,806)
Change in payables	2,136	1,549
Change in other liabilities	4,142	3,622
Net cash provided by operating activities	51,224	54,103
Cash flows from investing activities
Proceeds from disposals of assets	608	143
Proceeds from property insurance	1,485
Capital expenditures	(16,372)	(10,226)
Purchases of investments	(18,507)	(17,814)
Proceeds from sales of investments	11,529	9,757
Acquisitions, net of cash acquired	(15,879)	(15,997)
Net cash used for investing activities	(37,136)	(34,137)
Cash flows from financing activities
Payments on debt	(131)	(156)
Stock issued for stock and employee benefit plans, net of shares withheld for taxes	356	1,371
Excess tax benefit on stock option exercises		1,826
Purchases of common stock	(30,692)	(19,766)
Dividends paid	(10,648)	(9,869)
Net cash used for financing activities	(41,115)	(26,594)
Effect of exchange rate changes on cash and equivalents	865	(149)
Change in cash, cash equivalents and restricted cash	(26,162)	(6,777)
Cash, cash equivalents and restricted cash at beginning of period	150,859	121,335
Cash, cash equivalents and restricted cash at end of period	124,697	114,558
Supplemental disclosure of non-cash investing activities
Capital expenditures included in payables	$ 1,631	$ 681