Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016
OPERATING ACTIVITIES:
Net income	$ 20,582	$ 10,013
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7,184	7,633
Change in fair value of acquisition-related contingent consideration	145	124
Long-lived asset impairment loss	259	0
Loss from equity investment	154	82
Deferred income taxes	(942)	1,057
Share-based compensation expense	1,932	1,574
Other operating activities, net	174	(184)
Change in operating assets and liabilities:
Accounts receivable	(3,279)	(505)
Inventories	(8,466)	391
Other assets	(1,257)	(871)
Operating liabilities	3,375	6,244
Net cash provided by operating activities	19,861	25,558
INVESTING ACTIVITIES:
Capital expenditures	(5,223)	(2,168)
Proceeds from sale or maturity of investments	250	250
Purchase of investments	(255)	(500)
Proceeds (disbursements) from sale of assets	(344)	1,117
Other investing activities	(17)	(339)
Net cash used in investing activities	(5,589)	(1,640)
FINANCING ACTIVITIES:
Dividends paid	(9,384)	(9,428)
Payments for common shares repurchased	0	(7,702)
Payments of acquisition-related contingent liability	(320)	(282)
Restricted stock units vested and issued	(151)	(256)
Employee stock options exercises	(148)	0
Net cash used in financing activities	(10,003)	(17,668)
Effect of exchange rate changes on cash	280	91
Net increase (decrease) in cash and cash equivalents	4,549	6,341
Cash and cash equivalents at beginning of year	50,648	33,782
Cash and cash equivalents at end of period	$ 55,197	$ 40,123