Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2018
OPERATING ACTIVITIES
Net income	$ 74,861,000	$ 83,688,000	$ 63,141,000
Adjustments to reconcile net income to net cash and cash equivalents provided by operating activities:
Depreciation and amortization	98,513,000	94,446,000	45,004,000
Net loss on disposal of property, plant and equipment	2,629,000	1,973,000	615,000
Reduction in carrying amount of operating lease right-of-use assets	25,405,000
Amortization of debt issuance costs	2,603,000	2,724,000	0
Unrealized loss on foreign exchange forward contracts	1,102,000	0	0
Gain on sales of assets held for sale	0	0	257,000
Gain on insurance recoveries	0	(580,000)	0
Stock-based compensation expense	3,989,000	3,040,000	3,097,000
Deferred income taxes	(11,499,000)	(7,805,000)	21,404,000
Pension contributions in excess of expense	(1,130,000)	(7,875,000)	(20,928,000)
Excess tax benefit from stock-based compensation	0	(5,266,000)	0
Contributions of employer stock to employee benefit plan	3,772,000	3,623,000	3,554,000
Other non-cash items	672,000	916,000	14,000
Changes in operating assets and liabilities:
Customer receivables	21,018,000	9,719,000	(18,786,000)
Inventories	(4,486,000)	(4,852,000)	2,802,000
Income taxes receivable	1,162,000	26,357,000	(7,295,000)
Prepaid expenses and other assets	(3,165,000)	(5,172,000)	(7,492,000)
Accounts payable	(6,237,000)	(4,775,000)	(858,000)
Accrued compensation and related expenses	(5,843,000)	6,225,000	(2,525,000)
Operating lease liabilities	(22,595,000)
Marketing and other accrued expenses	(3,229,000)	(5,541,000)	4,771,000
Net Cash Provided by Operating Activities	177,542,000	190,845,000	86,775,000
INVESTING ACTIVITIES
Payments to acquire property, plant and equipment	(31,670,000)	(32,128,000)	(47,590,000)
Proceeds from sales of property, plant and equipment	323,000	64,000	27,000
Proceeds from insurance recoveries	0	580,000	0
Acquisition of business, net of cash acquired	0	(7,182,000)	(57,200,000)
Purchases of certificates of deposit	0	0	(25,000,000)
Maturities of certificates of deposit	1,500,000	8,000,000	87,750,000
Investment in promotional displays	(9,069,000)	(7,257,000)	(2,303,000)
Net Cash Used by Investing Activities	(38,916,000)	(37,923,000)	(44,316,000)
FINANCING ACTIVITIES
Payments of long-term debt	(98,468,000)	(122,205,000)	(96,572,000)
Proceeds from long-term debt	0	0	734,000
Proceeds from issuance of common stock and other	295,000	500,000	1,289,000
Repurchase of common stock	0	(50,000,000)	(29,000,000)
Withholding of employee taxes related to stock-based compensation	(1,050,000)	(1,739,000)	(2,803,000)
Debt issuance cost	0	(232,000)	(14,675,000)
Net Cash Provided (Used) by Financing Activities	(99,223,000)	(173,676,000)	(141,027,000)
Net (Decrease) Increase in Cash and Cash Equivalents	39,403,000	(20,754,000)	(98,568,000)
Cash and Cash Equivalents, Beginning of Year	57,656,000	78,410,000	176,978,000
Cash and Cash Equivalents, End of Year	97,059,000	57,656,000	78,410,000
Non-cash investing and financing activities:
Long-term debt related to funding acquisition	0	0	300,000
Long-term debt issued to satisfy outstanding debt	0	0	600,000
Long-term debt satisfied from issuance of debt	0	0	(602,750)
Stock issuance in connection with acquisition	0	0	189,849
Property, plant and equipment	1,303	1,331	5,530
Net other assets and liabilities related to acquisition	0	0	7,169
Cash paid during the period for:
Interest	27,654	35,908	5,919
Income taxes	$ 36,154	$ 22,035	$ 18,219