Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
OPERATING ACTIVITIES:
Net income	$ 31,909	$ 48,924
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	12,124	11,273
Change in fair value of acquisition-related contingent consideration	343	585
Gain from sale of equity method investment	0	(5,785)
Deferred income taxes	1,706	869
Share-based compensation expense	3,539	3,108
Other operating activities, net	(229)	(2,327)
Change in operating assets and liabilities:
Accounts receivable	(8,406)	(11,456)
Inventories	1,932	1,932
Other assets	2,592	428
Operating liabilities	1,568	4,757
Net cash provided by operating activities	47,078	52,308
INVESTING ACTIVITIES:
Capital expenditures	(6,143)	(10,421)
Proceeds from sale or maturity of investments	993	7,334
Purchases of investments	(934)	(502)
Proceeds (disbursements) from sale of assets, settlement of liabilities	3,459	832
Other investing activities	(3,208)	(2,042)
Net cash used in investing activities	(5,833)	(4,799)
FINANCING ACTIVITIES:
Dividends paid	(14,001)	(14,000)
Payments for common shares repurchased	(10,781)	0
Payment of acquisition-related contingent liabilities	(1,308)	(1,220)
Restricted stock units vested and issued	(2,358)	(774)
Employee stock options exercises	(706)	(2,635)
Other financing activities	(716)	(151)
Net cash used in financing activities	(29,870)	(18,780)
Effect of exchange rate changes on cash	(68)	(571)
Net increase in cash and cash equivalents	11,307	28,158
Cash and cash equivalents at beginning of year	65,787	40,535
Cash and cash equivalents at end of period	$ 77,094	$ 68,693