Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
OPERATING ACTIVITIES
Net income	$ 26,881,000	$ 24,767,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	24,113,000	23,018,000
Net loss on disposal of property, plant and equipment	66,000	354,000
Amortization of operating lease right-of-use assets	5,344,000	0
Amortization of debt issuance costs	662,000	700,000
Unrealized (gain) loss on foreign exchange forward contracts	56,000	(794,000)
Gain on insurance recoveries	0	(580,000)
Stock-based compensation expense	897,000	786,000
Deferred income taxes	(1,726,000)	(1,744,000)
Pension contributions in excess of expense	(461,000)	(1,545,000)
Contributions of employer stock to employee benefit plan	3,772,000	3,623,000
Other non-cash items	451,000	(456,000)
Changes in operating assets and liabilities:
Customer receivables	5,426,000	4,758,000
Income taxes receivable	0	8,153,000
Inventories	(7,137,000)	(8,270,000)
Prepaid expenses and other assets	(1,094,000)	835,000
Accounts payable	4,876,000	(7,793,000)
Accrued compensation and related expenses	(10,613,000)	1,741,000
Income taxes payable	10,575,000	0
Operating lease liabilities	(5,109,000)	0
Marketing and other accrued expenses	5,633,000	5,384,000
Net cash provided by operating activities	62,612,000	52,937,000
INVESTING ACTIVITIES
Payments to acquire property, plant and equipment	(4,360,000)	(9,309,000)
Proceeds from sales of property, plant and equipment	13,000	9,000
Proceeds from insurance recoveries	0	580,000
Acquisition of business, net of cash acquired	0	(7,182,000)
Maturities of certificates of deposit	1,000,000	1,750,000
Investment in promotional displays	(2,233,000)	(2,254,000)
Net cash used by investing activities	(5,580,000)	(16,406,000)
FINANCING ACTIVITIES
Payments of long-term debt	(42,589,000)	(63,516,000)
Proceeds from issuance of common stock	0	500,000
Withholding of employee taxes related to stock-based compensation	(1,050,000)	(1,739,000)
Net cash used by financing activities	(43,639,000)	(64,755,000)
Net increase (decrease) in cash and cash equivalents	13,393,000	(28,224,000)
Cash and cash equivalents, beginning of period	57,656,000	78,410,000
Cash and cash equivalents, end of period	71,049,000	50,186,000
Non-cash investing and financing activities:
Property, plant and equipment included in accounts payable at period end	1,014	2,052
Cash paid during the period for:
Interest	3,554	4,756
Income taxes	$ 607	$ 1,623