Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012
Current Assets:
Cash and cash equivalents	$ 97,367	$ 90,040
Accounts receivable, less allowance for doubtful accounts of $1,050 and $1,399, respectively	118,209	125,771
Costs and estimated earnings in excess of billings on uncompleted contracts	70,643	86,734
Inventories, net	31,291	32,917
Income taxes receivable	305	485
Deferred income taxes	4,771	4,598
Prepaid expenses and other current assets	5,240	5,865
Total Current Assets	327,826	346,410
Property, plant and equipment, net	89,194	78,652
Goodwill	1,003	1,003
Intangible assets, net	12,887	13,317
Other assets	9,371	8,930
Total assets	440,281	448,312
Current Liabilities:
Current maturities of long-term debt and capital lease obligations	486	725
Income taxes payable	879	3,516
Accounts payable	39,622	48,490
Accrued salaries, bonuses and commissions	15,745	25,822
Billings in excess of costs and estimated earnings on uncompleted contracts	45,185	37,144
Accrued product warranty	5,754	5,714
Other accrued expenses	7,125	9,462
Total Current Liabilities	114,796	130,873
Long-term debt and capital lease obligations, net of current maturities	3,200	3,630
Deferred compensation	3,287	2,891
Other liabilities	864	815
Total Liabilities	122,147	138,209
Commitments and Contingencies (Note G)
Stockholders' Equity:
Preferred stock, par value $.01; 5,000,000 shares authorized; none issued
Common stock, par value $.01; 30,000,000 shares authorized; 11,936,801 and 11,915,673 shares issued and outstanding, respectively	119	119
Additional paid-in capital	39,394	38,452
Retained earnings	279,296	271,911
Accumulated other comprehensive income (loss)	(675)	(379)
Total Stockholders' Equity	318,134	310,103
Total Liabilities and Stockholders' Equity	$ 440,281	$ 448,312