Consolidated Balance Sheets (USD $) In Thousands	Jul. 31, 2011	Jan. 31, 2011	Jul. 31, 2010
Current Assets
Cash and cash equivalents	$ 46,978	$ 37,563	$ 51,115
Short-term investments	0	1,000	2,500
Accounts receivable, net of allowances of $262, $300, and $299, respectively	43,248	39,967	34,670
Inventories:
Materials	34,782	30,261	29,453
In process	7,687	5,424	8,387
Finished goods	7,780	7,994	7,352
Total inventories	50,249	43,679	45,192
Deferred income taxes	2,804	2,733	2,725
Prepaid expenses and other current assets	2,937	3,239	3,295
Total current assets	146,216	128,181	139,497
Property, plant and equipment	111,518	102,080	91,702
Accumulated depreciation	(63,507)	(60,558)	(57,799)
Property, plant and equipment, net	48,011	41,522	33,903
Goodwill	10,777	10,777	10,777
Amortizable intangible assets, net	1,816	1,585	1,887
Other assets, net	4,508	5,695	6,933
TOTAL ASSETS	211,328	187,760	192,997
Current Liabilities
Accounts payable	16,825	16,715	14,842
Accrued liabilities	12,643	14,643	12,748
Taxes — accrued and withheld	2,244	1,453	1,449
Customer advances	2,258	1,524	3,034
Total current liabilities	33,970	34,335	32,073
Other liabilities	13,229	12,211	11,512
Total liabilities	47,199	46,546	43,585
Commitments and contingencies
Shareholders’ equity:
Common stock, $1 par value, authorized shares 100,000; issued 32,539, 32,511 and 32,487, respectively	32,539	32,511	32,487
Paid in capital	8,088	7,060	6,134
Retained earnings	177,783	156,125	165,252
Accumulated other comprehensive income (loss)	(919)	(1,120)	(1,099)
Less treasury stock, at cost, 14,449 shares	(53,362)	(53,362)	(53,362)
Total shareholders’ equity	164,129	141,214	149,412
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 211,328	$ 187,760	$ 192,997