Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Current Assets:
Cash and cash equivalents	$ 90,040	$ 123,466
Cash held in escrow		1,000
Accounts receivable, less allowance for doubtful accounts of $1,399 and $391, respectively	125,771	109,317
Costs and estimated earnings in excess of billings on uncompleted contracts	86,734	51,568
Inventories, net	32,917	36,640
Income taxes receivable	485	4,071
Deferred income taxes	4,598	3,580
Prepaid expenses and other current assets	5,865	7,040
Total Current Assets	346,410	336,682
Property, plant and equipment, net	78,652	59,637
Goodwill	1,003	1,003
Intangible assets, net	13,317	15,847
Other assets	8,930	8,507
Total Assets	448,312	421,676
Current Liabilities:
Current maturities of long-term debt and capital lease obligations	725	1,140
Income taxes payable	3,516	881
Accounts payable	48,490	56,893
Accrued salaries, bonuses and commissions	25,822	22,314
Billings in excess of costs and estimated earnings on uncompleted contracts	37,144	44,523
Accrued product warranty	5,714	4,603
Other accrued expenses	9,462	7,370
Total Current Liabilities	130,873	137,724
Long-term debt and capital lease obligations, net of current maturities	3,630	4,301
Deferred compensation	2,891	3,242
Postretirement benefit obligation	685	900
Other liabilities	130	166
Total Liabilities	138,209	146,333
Commitments and Contingencies (Note K)
Stockholders' Equity:
Preferred stock, par value $.01; 5,000,000 shares authorized; none issued
Common stock, par value $.01; 30,000,000 shares authorized; 11,915,673 and 11,752,393 shares issued and outstanding, respectively	119	117
Additional paid-in capital	38,452	34,343
Retained earnings	271,911	242,254
Accumulated other comprehensive income (loss)	(379)	(1,371)
Total Stockholders' Equity	310,103	275,343
Total Liabilities and Stockholders' Equity	$ 448,312	$ 421,676