Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
OPERATING ACTIVITIES:
Net income	$ 13,994	$ 19,023
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,170	2,892
Gain on acquisition-related contingent liability settlement	0	(508)
Change in fair value of acquisition-related contingent consideration	139	255
Loss from equity investment	25	24
Deferred income taxes	(133)	(477)
Share-based compensation expense	829	525
Change in operating assets and liabilities:
Accounts receivable	(2,973)	2,105
Inventories	(2,852)	97
Prepaid expense and other assets	(1,870)	(1,793)
Operating liabilities	4,558	6,077
Other operating activities, net	12	(8)
Net cash provided by operating activities	14,899	28,212
INVESTING ACTIVITIES:
Capital expenditures	(8,149)	(4,900)
Other investing activities, net	(263)	(58)
Net cash used in investing activities	(8,412)	(4,958)
FINANCING ACTIVITIES:
Dividends paid	(4,361)	(3,806)
Payments of acquisition-related contingent liability	(353)	(1,867)
Other financing activities, net	7	103
Net cash used in financing activities	(4,707)	(5,570)
Effect of exchange rate changes on cash	(28)	10
Net increase in cash and cash equivalents	1,752	17,694
Cash and cash equivalents at beginning of year	49,353	25,842
Cash and cash equivalents at end of period	$ 51,105	$ 43,536