Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended		12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Apr. 30, 2017
OPERATING ACTIVITIES
Net income	$ 44,032,000	$ 53,851,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	21,662,000	13,719,000
Net loss on disposal of property, plant and equipment	266,000	286,000
Stock-based compensation expense	2,506,000	2,477,000
Deferred income taxes	13,839,000	10,173,000
Pension contributions in excess of expense	(20,526,000)	(27,706,000)
Contributions of employer stock to employee benefit plan	3,554,000	2,926,000
Other non-cash items	(546,000)	(429,000)
Changes in operating assets and liabilities:
Customer receivables	(3,577,000)	(3,767,000)
Income taxes receivables	(8,652,000)	0
Inventories	235,000	(2,571,000)
Prepaid expenses and other assets	(6,639,000)	(1,983,000)
Accounts payable	(1,373,000)	(2,110,000)
Accrued compensation and related expenses	(4,495,000)	2,598,000
Other accrued expenses	8,595,000	4,200,000
Net cash provided by operating activities	48,881,000	51,664,000
INVESTING ACTIVITIES
Payments to acquire property, plant and equipment	(31,198,000)	(13,654,000)
Proceeds from sales of property, plant and equipment	14,000	37,000
Acquisition of business, net of cash acquired	(57,200,000)	0
Purchases of certificates of deposit	25,000,000	57,250,000
Maturities of certificates of deposit	86,750,000	23,000,000
Investment in promotional displays	(1,721,000)	(3,867,000)
Net cash used by investing activities	(28,355,000)	(51,734,000)
FINANCING ACTIVITIES
Payments of long-term debt	(21,397,000)	(1,290,000)
Proceeds from long-term debt	734,000	2,687,000
Proceeds from issuance of common stock	1,286,000	2,359,000
Repurchase of common stock	(29,000,000)	(13,407,000)
Notes receivable, net	0	208,000
Withholding of employee taxes related to stock-based compensation	(2,779,000)	(1,734,000)
Debt issuance cost	(6,724,000)	0
Net cash used by financing activities	(57,880,000)	(11,177,000)
Net decrease in cash and cash equivalents	(37,354,000)	(11,247,000)
Cash and cash equivalents, beginning of period	176,978,000	174,463,000	$ 174,463,000
Cash and cash equivalents, end of period	139,624,000	$ 163,216,000	176,978,000
Non-cash investing and financing activities:
Long-term debt related to funding acquisition	300,000		0
Stock issuance in connection with acquisition	189,849		0
Property, plant and equipment	4,687		0
Net other assets and liabilities related to acquisition	6,154		0
Cash paid during the period for:
Interest	272		435
Income taxes	$ 17,920		$ 19,966