Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
OPERATING ACTIVITIES
Net income (loss)	$ (29,722,000)	$ 61,193,000	$ 73,653,000
Adjustments to reconcile net income to net cash and cash equivalents provided by operating activities:
Depreciation and amortization	96,606,000	100,289,000	98,513,000
Net (gain) loss on disposal of property, plant and equipment	697,000	(1,859,000)	2,629,000
Reduction in carrying amount of operating lease right-of-use assets	27,610,000	27,192,000	25,405,000
Amortization of debt issuance costs	867,000	2,501,000	2,603,000
Unrealized (gain) loss on foreign exchange forward contracts	0	(1,102,000)	1,102,000
Loss on extinguishment of debt	0	(13,792,000)	0
Stock-based compensation expense	4,708,000	4,598,000	3,989,000
Deferred income taxes	(25,717,000)	(12,840,000)	(11,911,000)
Pension contributions in excess of (less than) expense	710,000	(2,007,000)	(1,130,000)
Pension settlement, net	(68,473,000)	0	0
Contributions of employer stock to employee benefit plan	2,938,000	3,743,000	3,772,000
Other non-cash items	489,000	4,140,000	672,000
Changes in operating assets and liabilities (net of acquired assets and liabilities):
Customer receivables	(11,366,000)	(42,829,000)	21,018,000
Inventories	(70,386,000)	(34,454,000)	(2,866,000)
Income taxes receivable	(6,206,000)	488,000	1,162,000
Prepaid expenses and other assets	(3,542,000)	(6,456,000)	(3,165,000)
Accounts payable	16,386,000	32,752,000	(6,237,000)
Accrued compensation and related expenses	(15,518,000)	1,226,000	(5,843,000)
Operating lease liabilities	(25,100,000)	(24,371,000)	(22,595,000)
Marketing and other accrued expenses	(7,482,000)	25,767,000	(3,229,000)
Net Cash Provided by Operating Activities	24,445,000	151,763,000	177,542,000
INVESTING ACTIVITIES
Payments to acquire property, plant and equipment	(44,122,000)	(35,734,000)	(31,670,000)
Proceeds from sales of property, plant and equipment	10,000	3,889,000	323,000
Maturities of certificates of deposit	0	0	1,500,000
Investment in promotional displays	(7,460,000)	(10,584,000)	(9,069,000)
Net Cash Used by Investing Activities	(51,572,000)	(42,429,000)	(38,916,000)
FINANCING ACTIVITIES
Payments of long-term debt	(50,891,000)	(432,508,000)	(98,468,000)
Proceeds from long-term debt	35,430,000	350,000,000	0
Proceeds from issuance of common stock and other	0	0	295,000
Repurchase of common stock	(25,000,000)	(20,000,000)	0
Withholding of employee taxes related to stock-based compensation	(1,116,000)	(1,351,000)	(1,050,000)
Debt issuance cost	(42,000)	(2,930,000)	0
Premium paid on debt extinguishment	0	(8,533,000)	0
Net Cash Used by Financing Activities	(41,619,000)	(115,322,000)	(99,223,000)
Net (Decrease) Increase in Cash and Cash Equivalents	(68,746,000)	(5,988,000)	39,403,000
Cash and Cash Equivalents, Beginning of Year	91,071,000	97,059,000	57,656,000
Cash and Cash Equivalents, End of Year	22,325,000	91,071,000	97,059,000
Non-cash investing and financing activities:
Property, plant and equipment	1,050	2,527	1,303
Cash paid during the period for:
Interest	9,904	22,981	27,654
Income taxes	$ 18,761	$ 33,055	$ 36,154