Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Sep. 30, 2014
Current Assets:
Cash and cash equivalents	$ 55,672	$ 103,118
Accounts receivable, less allowance for doubtful accounts of $1,881 and $1,577	121,366	107,162
Costs and estimated earnings in excess of billings on uncompleted contracts	96,709	95,970
Inventories	35,735	32,815
Income taxes receivable	3,493	2,804
Deferred income taxes	5,170	5,297
Prepaid expenses	2,894	5,870
Other current assets	4,828	4,291
Total Current Assets	325,867	357,327
Property, plant and equipment, net	161,789	156,896
Goodwill	1,003	1,003
Intangible assets, net	1,607	1,904
Deferred income taxes	3,941	11,422
Other assets	9,824	8,224
Long-term receivable (Note D)	2,333	4,667
Total Assets	506,364	541,443
Current Liabilities:
Current maturities of long-term debt and capital lease obligations	400	400
Income taxes payable	966	705
Accounts payable	53,339	70,209
Accrued salaries, bonuses and commissions	19,388	25,206
Billings in excess of costs and estimated earnings on uncompleted contracts	64,171	48,702
Accrued product warranty	4,375	4,557
Other accrued expenses	4,603	6,291
Deferred credit ─ short term (Note D)	2,029	2,029
Total Current Liabilities	149,271	158,099
Long-term debt and capital lease obligations, net of current maturities	2,400	2,800
Deferred compensation	5,446	4,226
Other long-term liabilities	669	655
Deferred credit ─ long term (Note D)	3,551	4,566
Total Liabilities	161,337	170,346
Commitments and Contingencies (Note F)
Stockholders' Equity:
Preferred stock, par value $.01; 5,000,000 shares authorized; none issued
Common stock, par value $.01; 30,000,000 shares authorized; 11,911,743 and 12,031,243 shares issued and outstanding, respectively	120	120
Additional paid-in capital	47,277	46,267
Retained earnings	321,027	331,213
Treasury stock, 171,416 shares at cost	(5,759)
Accumulated other comprehensive loss	(17,638)	(6,503)
Total Stockholders' Equity	345,027	371,097
Total Liabilities and Stockholders' Equity	$ 506,364	$ 541,443