Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Current Assets:
Cash and cash equivalents	$ 57,358	$ 43,569
Accounts receivable, less allowance for doubtful accounts of $976 and $746	103,443	101,784
Inventories	30,227	32,891
Costs and estimated earnings in excess of billings on uncompleted contracts	89,970	104,793
Income taxes receivable	2,529	1,232
Deferred income taxes	4,198	3,910
Prepaid expenses	2,652	5,004
Other current assets	2,829	3,916
Total Current Assets	293,206	297,099
Property, plant and equipment, net	150,722	154,594
Goodwill and intangible assets, net	2,234	2,393
Deferred income taxes	1,637	2,288
Other assets	10,627	10,117
Long-term receivable (Note D)	2,333	2,333
Total Assets	460,759	468,824
Current Liabilities:
Accounts payable	42,838	48,008
Accrued salaries, bonuses and commissions	20,883	19,223
Billings in excess of costs and estimated earnings on uncompleted contracts	39,556	42,057
Current maturities of long-term debt	400	400
Accrued product warranty	4,787	4,930
Other accrued expenses	6,143	7,521
Income taxes payable	1,113	784
Deferred credit ─ short term (Note D)	2,029	2,029
Total Current Liabilities	117,749	124,952
Long-term debt, net of current maturities	2,000	2,400
Deferred compensation	5,674	4,950
Other long-term liabilities	780	723
Deferred credit ─ long term (Note D)	1,522	2,537
Total Liabilities	$ 127,725	$ 135,562
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; 12,181,740 and 12,100,459 shares issued and outstanding, respectively	$ 122	$ 121
Additional paid-in capital	50,817	48,507
Retained earnings	327,481	328,294
Treasury stock, 806,018 and 670,181 shares at cost, respectively	(24,999)	(21,259)
Accumulated other comprehensive loss	(20,387)	(22,401)
Total Stockholders' Equity	333,034	333,262
Total Liabilities and Stockholders' Equity	$ 460,759	$ 468,824