Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
OPERATING ACTIVITIES
Net income	$ 15,158	$ 9,238
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,558	3,683
Net (gain) loss on disposal of property, plant and equipment	9	9
Stock-based compensation expense	963	943
Deferred income taxes	1,388	597
Pension contributions in excess of expense	(723)	(587)
Tax benefit from stock-based compensation	(2,297)	(5)
Contributions of employer stock to employee benefit plan	1,761	2,159
Other non-cash items	(2,911)	(1,299)
Changes in operating assets and liabilities:
Customer receivables	(7,141)	(5,128)
Inventories	(1,043)	(3,996)
Prepaid expenses and other assets	428	641
Accounts payable	543	2,419
Accrued compensation and related expenses	(2,948)	(3,551)
Increase (Decrease) in Income Taxes Payable	5,701	3,018
Other accrued expenses	2,571	1,126
Net Cash Provided by Operating Activities	15,017	9,267
INVESTING ACTIVITIES
Payments to acquire property, plant, and equipment	(11,133)	(2,477)
Proceeds from sales of property, plant, and equipment	82	7
Investment in certificates of deposit, net	(2,250)	0
Investment in promotional displays	(1,994)	(802)
Net Cash Used by Investing Activities	(15,295)	(3,272)
FINANCING ACTIVITIES
Payments of long-term debt	(370)	(282)
Proceeds from issuance of common stock	3,556	600
Repurchase of common stock	(1,768)	(4,064)
Notes receivable, net	42	167
Tax benefit from stock-based compensation	2,297	5
Net Cash Provided (Used) by Financing Activities	3,757	(3,574)
Net Increase in Cash and Cash Equivalents	3,479	2,421
Cash And Cash Equivalents, Beginning of Period	149,541	135,700
Cash And Cash Equivalents, End of Period	$ 153,020	$ 138,121