Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
OPERATING ACTIVITIES
Net income	$ 33,338	$ 16,909
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7,513	7,390
Net loss on disposal of property, plant and equipment	82	32
Stock-based compensation expense	1,795	1,764
Deferred income taxes	3,813	1,209
Pension contributions in excess of expense	(1,677)	(1,465)
Tax benefit from stock-based compensation	(3,599)	(35)
Contributions of employer stock to employee benefit plan	1,761	3,302
Other non-cash items	(2,807)	(702)
Changes in operating assets and liabilities:
Customer receivables	(15,296)	(8,452)
Inventories	(2,317)	(4,732)
Prepaid expenses and other assets	(831)	(75)
Accounts payable	5,569	2,027
Accrued compensation and related expenses	4,743	(1,470)
Income taxes payable	(246)	(591)
Other accrued expenses	7,509	3,526
Net Cash Provided by Operating Activities	39,350	18,637
INVESTING ACTIVITIES
Payments to acquire property, plant and equipment	(21,131)	(6,347)
Proceeds from sales of property, plant and equipment	81	15
Investment in certificates of deposit, net	(1,500)	(18,000)
Investment in promotional displays	(3,245)	(1,652)
Net Cash Used by Investing Activities	(25,795)	(25,984)
FINANCING ACTIVITIES
Payments of long-term debt	(752)	(614)
Proceeds from issuance of common stock	5,987	7,850
Repurchase of common stock	(7,000)	(5,053)
Notes receivable, net	42	292
Tax benefit from stock-based compensation	3,599	35
Net Cash Provided by Financing Activities	1,876	2,510
Net Increase (Decrease) in Cash and Cash Equivalents	15,431	(4,837)
Cash and Cash Equivalents, Beginning of Period	149,541	135,700
Cash and Cash Equivalents, End of Period	$ 164,972	$ 130,863