Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
OPERATING ACTIVITIES
Net income (loss)	$ 93,723,000	$ (29,722,000)	$ 61,193,000
Adjustments to reconcile net income to net cash and cash equivalents provided by operating activities:
Depreciation and amortization	93,744,000	96,606,000	100,289,000
Net (gain) loss on disposal of property, plant and equipment	1,050,000	697,000	(1,859,000)
Reduction in carrying amount of operating lease right-of-use assets	26,592,000	27,610,000	27,192,000
Amortization of debt issuance costs	861,000	867,000	2,501,000
Unrealized gain on foreign exchange forward contracts	0	0	(1,102,000)
Net (gain) loss on debt forgiveness and modification	2,089,000	0	(13,792,000)
Stock-based compensation expense	7,396,000	4,708,000	4,598,000
Deferred income taxes	(24,152,000)	(25,717,000)	(12,840,000)
Pension contributions in excess of (less than) expense	0	710,000	(2,007,000)
Pension settlement, net	7,000	(68,473,000)	0
Contributions of employer stock to employee benefit plan	838,000	2,938,000	3,743,000
Other non-cash items	7,522,000	489,000	4,140,000
Changes in operating assets and liabilities (net of acquired assets and liabilities):
Customer receivables	35,011,000	(11,366,000)	(42,829,000)
Inventories	30,937,000	(70,386,000)	(34,454,000)
Income taxes receivable	3,055,000	(6,206,000)	488,000
Prepaid expenses and other assets	(5,309,000)	(3,542,000)	(6,456,000)
Accounts payable	(50,191,000)	16,386,000	32,752,000
Accrued compensation and related expenses	5,060,000	(15,518,000)	1,226,000
Operating lease liabilities	(26,906,000)	(25,100,000)	(24,371,000)
Marketing and other accrued expenses	1,702,000	(7,482,000)	25,767,000
Net Cash Provided by Operating Activities	198,837,000	24,445,000	151,763,000
INVESTING ACTIVITIES
Payments to acquire property, plant and equipment	(42,600,000)	(44,122,000)	(35,734,000)
Proceeds from sales of property, plant and equipment	43,000	10,000	3,889,000
Investment in promotional displays	(2,780,000)	(7,460,000)	(10,584,000)
Net Cash Used by Investing Activities	(45,337,000)	(51,572,000)	(42,429,000)
FINANCING ACTIVITIES
Payments of long-term debt	(132,894,000)	(50,891,000)	(432,508,000)
Proceeds from long-term debt	0	35,430,000	350,000,000
Repurchase of common stock	0	(25,000,000)	(20,000,000)
Withholding of employee taxes related to stock-based compensation	(1,199,000)	(1,116,000)	(1,351,000)
Debt issuance cost	0	(42,000)	(2,930,000)
Premium paid on debt extinguishment	0	0	(8,533,000)
Net Cash Used by Financing Activities	(134,093,000)	(41,619,000)	(115,322,000)
Net Increase (Decrease) in Cash and Cash Equivalents	19,407,000	(68,746,000)	(5,988,000)
Cash and Cash Equivalents, Beginning of Year	22,325,000	91,071,000	97,059,000
Cash and Cash Equivalents, End of Year	41,732,000	22,325,000	91,071,000
Non-cash investing and financing activities:
Property, plant and equipment	2,684	1,050	2,527
Cash paid during the period for:
Interest	17,347	9,904	22,981
Income taxes	$ 49,593	$ 18,761	$ 33,055