Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jan. 31, 2012	Jan. 31, 2011
Operating Activities
Net loss	$ (14,806)	$ (16,630)
Adjustments to reconcile net loss to net cash provided (used) by operating activities:
Depreciation and amortization	17,204	20,358
Net loss on disposal of property, plant, and equipment	109	130
Impairment loss related to restructuring activities	5,413	0
Gain on sale of assets held for sale	0	(60)
Stock-based compensation expense	2,606	2,849
Deferred income taxes	(8,812)	(8,648)
Pension contributions less than expense	4,403	5,180
Tax benefit from stock-based compensation	0	(80)
Other non-cash items	(212)	(711)
Changes in operating assets and liabilities:
Customer receivables	6,265	(319)
Inventories	1,266	1,485
Income taxes receivable and other assets	272	5,548
Accounts payable	(3,398)	1,985
Accrued compensation and related expenses	4,076	(5,358)
Other accrued expenses	(964)	1,984
Net Cash Provided by Operating Activities	13,422	7,713
Investing Activities
Payments to acquire property, plant, and equipment	(5,215)	(3,623)
Proceeds from sales of property, plant, and equipment	15	3
Proceeds from sale of assets held for sale	0	1,474
Investment in promotional displays	(2,388)	(2,154)
Net Cash Used by Investing Activities	(7,588)	(4,300)
Financing Activities
Payments of long-term debt	(774)	(739)
Restricted cash	16	0
Proceeds from issuance of common stock	18	400
Payment of dividends	(1,287)	(3,845)
Tax benefit from stock-based compensation	0	80
Net Cash Used by Financing Activities	(2,027)	(4,104)
Net Increase/(Decrease) In Cash And Cash Equivalents	3,807	(691)
Cash And Cash Equivalents, Beginning of Period	55,420	53,233
Cash And Cash Equivalents, End of Period	$ 59,227	$ 52,542