Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2019	Apr. 30, 2018
OPERATING ACTIVITIES:
Net income	$ 13,210	$ 22,147
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,082	3,683
Change in fair value of acquisition-related contingent consideration	94	152
Gain from sale of equity method investment	0	(5,785)
Deferred income taxes	1,511	(293)
Share-based compensation expense	782	787
Other operating activities, net	32	(2,102)
Change in operating assets and liabilities:
Accounts receivable	(13,510)	(8,893)
Inventories	(4,092)	134
Other assets	1,373	(42)
Operating liabilities	5,280	3,815
Net cash provided by operating activities	8,762	13,603
INVESTING ACTIVITIES:
Capital expenditures	(1,570)	(4,164)
Proceeds from sale or maturity of investments	0	6,556
Purchases of investments	(843)	(79)
Proceeds (disbursements) from sale of assets, settlement of liabilities	0	832
Other investing activities	(28)	40
Net cash (used in) provided by investing activities	(2,441)	3,185
FINANCING ACTIVITIES:
Dividends paid	(4,682)	(4,658)
Payments for common shares repurchased	(2,281)	0
Payments of acquisition-related contingent liability	(620)	(295)
Restricted stock units vested and issued	(2,320)	(653)
Employee stock options exercises	(667)	(117)
Other financing activities	(95)	(52)
Net cash used in financing activities	(10,665)	(5,775)
Effect of exchange rate changes on cash	(73)	(231)
Net increase (decrease) in cash and cash equivalents	(4,417)	10,782
Cash and cash equivalents at beginning of year	65,787	40,535
Cash and cash equivalents at end of period	$ 61,370	$ 51,317