Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
OPERATING ACTIVITIES:
Net income	$ 18,496	$ 31,909
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	12,829	12,124
Change in fair value of acquisition-related contingent consideration	(183)	343
Deferred income taxes	(3,586)	1,706
Share-based compensation expense	4,978	3,539
Other operating activities, net	(136)	(229)
Change in operating assets and liabilities:
Accounts receivable	6,142	(8,406)
Inventories	6,556	1,932
Other assets	(130)	2,592
Operating liabilities	10,134	1,568
Net cash provided by operating activities	55,100	47,078
INVESTING ACTIVITIES:
Capital expenditures	(10,931)	(6,143)
Proceeds from sale or maturity of Investments	586	993
Purchases of investments	(227)	(934)
Proceeds from sale of assets	251	3,459
Other investing activities	(272)	(3,208)
Net cash used in investing activities	(10,593)	(5,833)
FINANCING ACTIVITIES:
Dividends paid	(9,318)	(14,001)
Payments for common shares repurchased	0	(10,781)
Proceeds from debt	51,685	0
Repayments of debt	(50,000)	0
Payments for redeemable noncontrolling interest	(17,853)	0
Payment of acquisition-related contingent liabilities	0	(1,308)
Restricted stock units vested and issued	(666)	(2,358)
Employee stock options exercises	(184)	(706)
Other financing activities	(319)	(716)
Net cash used in financing activities	(26,655)	(29,870)
Effect of Exchange Rate on Cash and Cash Equivalents	(342)	(68)
Net Increase in Cash and Cash Equivalents	17,510	11,307
Cash and Cash Equivalents, Beginning Balance	20,707	65,787
Cash and Cash Equivalents, Ending Balance	38,217	77,094
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital expenditures converted from inventories	$ 2,960	$ 0