Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2017	Oct. 31, 2016
OPERATING ACTIVITIES:
Net income	$ 32,579	$ 15,754
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	10,985	11,526
Change in fair value of acquisition-related contingent consideration	198	(41)
Long-lived asset impairment loss	259	87
Loss from equity investment	247	223
Deferred income taxes	(1,035)	(290)
Share-based compensation expense	2,861	2,291
Other operating activities, net	868	8
Change in operating assets and liabilities:
Accounts receivable	(8,160)	(1,620)
Inventories	(9,213)	3,048
Other assets	(897)	(135)
Operating liabilities	2,142	7,834
Net cash provided by operating activities	30,834	38,685
INVESTING ACTIVITIES:
Capital expenditures	(7,003)	(3,901)
Payments related to business acquisitions	(12,700)	0
Proceeds from sale or maturity of investments	250	250
Purchase of investments	(255)	(750)
(Disbursements) proceeds from sale of assets	(333)	1,145
Other investing activities	(36)	(498)
Net cash used in investing activities	(20,077)	(3,754)
FINANCING ACTIVITIES:
Dividends paid	(14,032)	(14,148)
Payments for common shares repurchased	(10,000)	(7,702)
Payments of acquisition-related contingent liability	(364)	(318)
Restricted stock units vested and issued	(151)	(256)
Employee stock options exercises	(157)	0
Net cash used in financing activities	(24,704)	(22,424)
Effect of exchange rate changes on cash	172	24
Net increase (decrease) in cash and cash equivalents	(13,775)	12,531
Cash and cash equivalents at beginning of year	50,648	33,782
Cash and cash equivalents at end of period	$ 36,873	$ 46,313