Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Noncash or Part Noncash Acquisition, Debt Assumed	$ 0	$ 300,000
Stock Issued	0	189,849
OPERATING ACTIVITIES
Net income	61,664,000	44,032,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	70,284,000	21,662,000
Net loss on disposal of property, plant and equipment	661,000	266,000
Amortization of debt issuance costs	2,054,000	0
Unrealized gain on foreign exchange forward contracts	(291,000)	0
Gain on insurance recoveries	(580,000)	0
Stock-based compensation expense	2,290,000	2,506,000
Deferred income taxes	(5,757,000)	13,839,000
Pension contributions in excess of expense	(7,727,000)	(20,526,000)
Excess Tax Benefit from Share-based Compensation, Operating Activities	5,171,000	0
Contributions of employer stock to employee benefit plan	3,623,000	3,554,000
Other non-cash items	(222,000)	(546,000)
Changes in operating assets and liabilities:
Customer receivables	19,201,000	(3,577,000)
Income taxes receivable	27,265,000	(8,652,000)
Inventories	(11,731,000)	235,000
Prepaid expenses and other assets	(5,726,000)	(6,639,000)
Accounts payable	(8,323,000)	(1,373,000)
Accrued compensation and related expenses	724,000	(4,495,000)
Marketing and other accrued expenses	(4,288,000)	8,595,000
Net cash provided by operating activities	137,950,000	48,881,000
INVESTING ACTIVITIES
Payments to acquire property, plant and equipment	(26,294,000)	(31,198,000)
Proceeds from sales of property, plant and equipment	59,000	14,000
Proceeds from insurance recoveries	580,000	0
Acquisition of business, net of cash acquired	(7,182,000)	(57,200,000)
Purchases of certificates of deposit	0	25,000,000
Maturities of certificates of deposit	7,000,000	86,750,000
Investment in promotional displays	(5,462,000)	(1,721,000)
Net cash used by investing activities	(31,299,000)	(28,355,000)
FINANCING ACTIVITIES
Payments of long-term debt	(100,631,000)	(21,397,000)
Proceeds from long-term debt	0	734,000
Proceeds from issuance of common stock	500,000	1,286,000
Repurchase of common stock	(40,950,000)	(29,000,000)
Withholding of employee taxes related to stock-based compensation	(1,739,000)	(2,779,000)
Excess Tax Benefit from Share-based Compensation, Financing Activities	(232,000)	(6,724,000)
Net cash used by financing activities	(143,052,000)	(57,880,000)
Net decrease in cash and cash equivalents	(36,401,000)	(37,354,000)
Cash and cash equivalents, beginning of period	78,410,000	176,978,000
Cash and cash equivalents, end of period	42,009,000	139,624,000
Non-cash investing and financing activities:
Property, plant and equipment included in accounts payable at period end	462	4,687
Noncash Or Part Noncash Acquisition, Other Assets Acquired (Liabilities Assumed)	0	6,154
Cash paid during the period for:
Interest	23,442	272
Income taxes	$ 13,109	$ 17,920