Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
OPERATING ACTIVITIES:
Net income	$ 21,976	$ 35,868
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	8,122	7,401
Change in fair value of acquisition-related contingent consideration	243	403
Gain from sale of equity method investment	0	(5,785)
Deferred income taxes	1,575	(439)
Share-based compensation expense	2,548	2,281
Other operating activities, net	1,544	(1,987)
Change in operating assets and liabilities:
Accounts receivable	(6,762)	(2,982)
Inventories	(7,326)	(792)
Other assets	107	74
Operating liabilities	4,133	4,610
Net cash provided by operating activities	26,160	38,652
INVESTING ACTIVITIES:
Capital expenditures	(3,784)	(6,853)
Proceeds from sale or maturity of investments	993	6,668
Purchases of investments	(907)	(164)
Proceeds (disbursements) from sale of assets, settlement of liabilities	0	832
Other investing activities	20	(1,971)
Net cash used in investing activities	(3,678)	(1,488)
FINANCING ACTIVITIES:
Dividends paid	(9,353)	(9,326)
Payments for common shares repurchased	(5,781)	0
Payment of acquisition-related contingent liabilities	(717)	(499)
Restricted stock units vested and issued	(2,320)	(679)
Employee stock options exercises	(722)	(1,251)
Other financing activities	(199)	(102)
Net cash used in financing activities	(19,092)	(11,857)
Effect of exchange rate changes on cash	(46)	(403)
Net increase in cash and cash equivalents	3,344	24,904
Cash and cash equivalents at beginning of year	65,787	40,535
Cash and cash equivalents at end of period	$ 69,131	$ 65,439