Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2011	Sep. 30, 2010
Current Assets:
Cash and cash equivalents	$ 123,466	$ 115,353
Cash held in escrow	1,000	0
Accounts receivable, less allowance for doubtful accounts of $391 and $907, respectively	109,317	91,766
Costs and estimated earnings in excess of billings on uncompleted contracts	51,568	38,064
Inventories, net	36,640	38,244
Income taxes receivable	4,071	6,726
Deferred income taxes	3,580	3,087
Prepaid expenses and other current assets	7,040	8,951
Total Current Assets	336,682	302,191
Property, plant and equipment, net	59,637	63,676
Goodwill	1,003	1,003
Intangible assets, net	15,847	26,132
Other assets	8,507	7,710
Total Assets	421,676	400,712
Current Liabilities:
Current maturities of long-term debt and capital lease obligations	1,140	1,683
Income taxes payable	881	1,500
Accounts payable	56,893	41,850
Accrued salaries, bonuses and commissions	22,314	25,064
Billings in excess of costs and estimated earnings on uncompleted contracts	44,523	31,009
Accrued product warranty	4,603	5,929
Other accrued expenses	7,370	7,711
Total Current Liabilities	137,724	114,746
Long-term debt and capital lease obligations, net of current maturities	4,301	5,202
Deferred compensation	3,242	2,730
Postretirement benefit obligation	900	532
Other liabilities	166	199
Total Liabilities	146,333	123,409
Commitments and Contingencies (Note L)
Stockholders' Equity:
Preferred stock, par value $.01; 5,000,000 shares authorized; none issued
Common stock, par value $.01; 30,000,000 shares authorized; 11,752,393 and 11,676,955 shares issued and outstanding, respectively	117	117
Additional paid-in capital	34,343	33,569
Retained earnings	242,254	244,969
Accumulated other comprehensive income (loss)	(1,371)	(1,352)
Total Stockholders' Equity	275,343	277,303
Total Liabilities and Equity	$ 421,676	$ 400,712