Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
OPERATING ACTIVITIES:
Net income	$ 22,147	$ 12,348
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,683	3,614
Change in fair value of acquisition-related contingent consideration	152	91
Long-lived asset impairment loss	0	259
Loss from equity investment	0	110
Gain from sale of equity method investment	(5,785)	0
Deferred income taxes	(293)	(783)
Share-based compensation expense	787	791
Other operating activities, net	(2,102)	174
Change in operating assets and liabilities:
Accounts receivable	(8,893)	(8,623)
Inventories	134	(7,519)
Other assets	(42)	(1,041)
Operating liabilities	3,815	8,281
Net cash provided by operating activities	13,603	7,702
INVESTING ACTIVITIES:
Capital expenditures	(4,164)	(2,790)
Proceeds from sale or maturity of investments	6,556	0
Purchase of investments	(79)	0
Proceeds from sale of assets	832	14
Other investing activities	40	(60)
Net cash provided by (used in) investing activities	3,185	(2,836)
FINANCING ACTIVITIES:
Dividends paid	(4,658)	(4,691)
Payments of acquisition-related contingent liability	(295)	(161)
Restricted stock units vested and issued	(653)	(152)
Employee stock options exercises	(117)	11
Other financing activities	(52)	0
Net cash used in financing activities	(5,775)	(4,993)
Effect of exchange rate changes on cash	(231)	(44)
Net increase (decrease) in cash and cash equivalents	10,782	(171)
Cash and cash equivalents at beginning of year	40,535	50,648
Cash and cash equivalents at end of period	$ 51,317	$ 50,477