Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
OPERATING ACTIVITIES
Net income (loss)	$ 20,461	$ 9,758	$ (20,786)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	14,545	14,431	23,387
Net loss on disposal of property, plant and equipment	123	231	180
Impairment loss related to restructuring activities	0	270	7,913
(Gain) loss on sales of assets held for sale	(323)	(481)	111
Gain on insurance recoveries	(94)	(975)	0
Stock-based compensation expense	3,295	3,509	3,413
Deferred income taxes	7,978	5,789	(12,290)
Pension contributions (in excess of) less than expense	(2,039)	(4,299)	4,528
Tax benefit from stock-based compensation	(854)	(18)	0
Other non-cash items	1,209	944	867
Changes in operating assets and liabilities:
Customer receivables	(7,546)	(6,825)	(1,533)
Inventories	(2,875)	(7,068)	115
Prepaid expenses and other assets	(1,236)	(1,669)	(320)
Accounts payable	5,869	3,814	923
Accrued compensation, marketing and other accrued expenses	2,022	7,116	9,545
Net Cash Provided by Operating Activities	40,535	24,527	16,053
INVESTING ACTIVITIES
Payments to acquire property, plant, and equipment	(7,903)	(8,860)	(6,679)
Proceeds from sales of property, plant, and equipment	81	80	15
Proceeds from sales of assets held for sale	1,644	6,447	56
Proceeds from insurance recoveries	94	975	0
Investment in promotional displays	(3,499)	(4,759)	(3,310)
Net Cash Used by Investing Activities	(9,583)	(6,117)	(9,918)
FINANCING ACTIVITIES
Payments of long-term debt	(4,516)	(1,019)	(1,021)
Change in restricted cash	0	7,064	7,355
Tax benefit from stock-based compensation	854	18	0
Proceeds from issuance of common stock	15,330	5,878	18
Repurchase of common stock	(3,141)	0	0
Notes receivable, net	(750)	0	0
Payment of dividends	0	0	(1,287)
Net Cash Provided by Financing Activities	7,777	11,941	5,065
Net Increase in Cash And Cash Equivalents	38,729	30,351	11,200
Cash And Cash Equivalents, Beginning of Year	96,971	66,620	55,420
Cash And Cash Equivalents, End of Year	$ 135,700	$ 96,971	$ 66,620