CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Jan. 27, 2018	Jan. 28, 2017
Cash flows from operating activities
Net income	$ 47,235	$ 58,755
Adjustments to reconcile net income to cash provided by (used for) operating activities
Gain on disposal of assets	(1,849)	(103)
Gain on conversion of investment	(2,204)
Deferred income tax expense	10,543	3,214
Provision for doubtful accounts	198	(64)
Depreciation and amortization	23,671	21,311
Equity-based compensation expense	7,929	7,571
Pension plan contributions	(2,000)	(2,300)
Change in receivables	5,057	(576)
Change in inventories	(9,142)	(5,929)
Change in other assets	(3,304)	(4,415)
Change in payables	12,529	6,359
Change in other liabilities	2,537	9,191
Net cash provided by operating activities	91,200	93,014
Cash flows from investing activities
Proceeds from disposals of assets	620	273
Proceeds from property insurance	1,807
Capital expenditures	(24,138)	(15,529)
Purchases of investments	(24,124)	(20,778)
Proceeds from sales of investments	17,109	13,899
Acquisitions, net of cash acquired	(16,495)	(35,878)
Net cash used for investing activities	(45,221)	(58,013)
Cash flows from financing activities
Payments on debt	(203)	(217)
Payments for debt issuance costs	(220)
Stock issued for stock and employee benefit plans, net of shares withheld for taxes	1,418	1,739
Excess tax benefit on stock option exercises		1,924
Purchases of common stock	(46,074)	(25,062)
Dividends paid	(16,343)	(15,270)
Net cash used for financing activities	(61,422)	(36,886)
Effect of exchange rate changes on cash and equivalents	2,204	(139)
Change in cash, cash equivalents and restricted cash	(13,239)	(2,024)
Cash, cash equivalents and restricted cash at beginning of period	150,859	121,335
Cash, cash equivalents and restricted cash at end of period	137,620	119,311
Supplemental disclosure of non-cash investing activities
Capital expenditures included in payables	$ 3,926	$ 1,012