Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jul. 31, 2021	Jan. 31, 2021
Current assets
Cash and cash equivalents	$ 13,077	$ 32,938
Accounts receivable, net	70,591	48,669
Inventories, net	75,692	52,703
Other current assets	8,550	5,776
Total current assets	167,910	140,086
Property, plant and equipment, net	108,883	106,007
Goodwill	108,574	107,677
Intangible assets, net	47,470	44,585
Other assets	11,395	11,016
TOTAL ASSETS	444,232	409,371
Current liabilities
Accounts payable	21,588	18,639
Accrued liabilities	39,173	30,401
Other current liabilities	5,088	2,998
Total current liabilities	65,849	52,038
Long-term debt	2,849	1,981
Other liabilities	23,010	23,997
Liabilities, Total	91,708	78,016
Commitments and contingencies (see Note 11)
Shareholders' equity
Common stock, $1 par value, authorized shares 100,000; issued 67,583 and 67,533, respectively	67,583	67,533
Additional paid-in capital	69,910	66,670
Retained earnings	328,149	311,676
Accumulated other comprehensive loss	(1,935)	(3,341)
Treasury stock at cost, 31,665 and 31,665 shares, respectively	(111,183)	(111,183)
Total shareholders' equity	352,524	331,355
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 444,232	$ 409,371
Stockholders' Equity, Number of Shares, Par Value and Other Disclosures [Abstract]
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	67,583,000	67,533,000
Treasury Stock, Common, Shares	31,665,000	31,665,000