Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
OPERATING ACTIVITIES
Net income	$ 49,044,000	$ 43,255,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	48,527,000	46,726,000
Net loss on disposal of property, plant and equipment	217,000	584,000
Amortization of operating lease right-of-use assets	12,768,000	0
Amortization of debt issuance costs	1,316,000	1,356,000
Unrealized (gain) loss on foreign exchange forward contracts	(96,000)	199,000
Gain on insurance recoveries	0	(580,000)
Stock-based compensation expense	2,075,000	1,622,000
Deferred income taxes	(5,464,000)	(4,899,000)
Pension contributions in excess of expense	(626,000)	(1,989,000)
Contributions of employer stock to employee benefit plan	3,772,000	3,623,000
Other non-cash items	951,000	(971,000)
Changes in operating assets and liabilities:
Customer receivables	5,026,000	5,434,000
Income taxes receivable	(1,695,000)	22,108,000
Inventories	(12,123,000)	(10,835,000)
Prepaid expenses and other assets	(5,634,000)	(2,130,000)
Accounts payable	673,000	(2,901,000)
Accrued compensation and related expenses	(4,379,000)	9,101,000
Operating lease liabilities	(11,783,000)	0
Marketing and other accrued expenses	3,663,000	(2,036,000)
Net cash provided by operating activities	86,232,000	107,667,000
INVESTING ACTIVITIES
Payments to acquire property, plant and equipment	(15,918,000)	(14,755,000)
Proceeds from sales of property, plant and equipment	313,000	35,000
Proceeds from insurance recoveries	0	580,000
Acquisition of business, net of cash acquired	0	(7,182,000)
Maturities of certificates of deposit	1,500,000	5,000,000
Investment in promotional displays	(4,183,000)	(3,395,000)
Net cash used by investing activities	(18,288,000)	(19,717,000)
FINANCING ACTIVITIES
Payments of long-term debt	(73,198,000)	(94,060,000)
Proceeds from issuance of common stock	83,000	500,000
Payments for Repurchase of Common Stock	0	13,199,000
Withholding of employee taxes related to stock-based compensation	(1,050,000)	(1,739,000)
Net cash used by financing activities	(74,165,000)	(108,498,000)
Net decrease in cash and cash equivalents	(6,221,000)	(20,548,000)
Cash and cash equivalents, beginning of period	57,656,000	78,410,000
Cash and cash equivalents, end of period	51,435,000
Non-cash investing and financing activities:
Property, plant and equipment included in accounts payable at period end	901	2,619
Cash paid during the period for:
Interest	15,025	19,131
Income taxes	$ 24,573	$ 9,976