Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jan. 31, 2013	Jan. 31, 2012
Operating Activities
Net income (loss)	$ 4,568	$ (14,806)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	10,967	17,204
Net loss on disposal of property, plant, and equipment	107	109
Impairment loss related to restructuring activities	0	5,413
Gain on sale of assets held for sale	(481)	0
Stock-based compensation expense	2,648	2,606
Deferred income taxes	2,994	(8,812)
Pension contributions (in excess) less than expense	(4,360)	4,403
Tax benefit from stock-based compensation	(331)	0
Other non-cash items	325	(212)
Changes in operating assets and liabilities:
Customer receivables	(8,552)	6,265
Inventories	(5,689)	1,266
Income taxes receivable and other assets	(835)	272
Accounts payable	3,449	(3,398)
Accrued compensation and related expenses	419	4,076
Other accrued expenses	(2,593)	(964)
Net Cash Provided by Operating Activities	2,636	13,422
Investing Activities
Payments to acquire property, plant, and equipment	(7,667)	(5,215)
Proceeds from sales of property, plant, and equipment	75	15
Proceeds from sale of assets held for sale	6,447	0
Investment in promotional displays	(3,426)	(2,388)
Net Cash Used by Investing Activities	(4,571)	(7,588)
Financing Activities
Payments of long-term debt	(830)	(774)
Restricted cash	0	16
Tax benefit from stock-based compensation	331	0
Proceeds from issuance of common stock	1,818	18
Payment of dividends	0	(1,287)
Net Cash Used by Financing Activities	1,319	(2,027)
Net Increase (Decrease) in Cash And Cash Equivalents	(616)	3,807
Cash And Cash Equivalents, Beginning of Period	66,620	55,420
Cash And Cash Equivalents, End of Period	$ 66,004	$ 59,227