Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2013
Current Assets:
Cash and cash equivalents	$ 101,393	$ 107,411
Accounts receivable, less allowance for doubtful accounts of $501 and $572, respectively	114,895	112,074
Costs and estimated earnings in excess of billings on uncompleted contracts	79,517	79,420
Inventories	29,430	28,963
Income taxes receivable	2,635	3,022
Deferred income taxes	5,925	4,490
Prepaid expenses and other current assets	8,146	6,551
Current assets held for sale		15,409
Total Current Assets	341,941	357,340
Property, plant and equipment, net	145,055	144,495
Goodwill	1,003	1,003
Intangible assets, net	2,147	11,612
Deferred income taxes	10,646	9,016
Other assets	9,605	7,293
Long-term receivable (Note D)	4,667
Long-term assets held for sale		144
Total Assets	515,064	530,903
Current Liabilities:
Current maturities of long-term debt and capital lease obligations	400	416
Income taxes payable	5,267	4,647
Accounts payable	49,855	55,528
Accrued salaries, bonuses and commissions	20,063	25,799
Billings in excess of costs and estimated earnings on uncompleted contracts	42,019	48,334
Accrued product warranty	4,833	5,282
Other accrued expenses	5,775	10,209
Deferred credit-short term (Note D)	2,029
Current liabilities held for sale		17,848
Total Current Liabilities	130,241	168,063
Long-term debt and capital lease obligations, net of current maturities	2,800	3,200
Deferred compensation	4,118	3,480
Postretirement benefit obligation and other long-term liabilities	777	730
Deferred credit-long term (Note D)	5,581
Long-term liabilities held for sale		204
Total Liabilities	143,517	175,677
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; 12,014,693 and11,970,967 shares issued and outstanding, respectively	120	119
Additional paid-in capital	44,694	43,193
Retained earnings	331,842	313,987
Accumulated other comprehensive loss	(5,109)	(2,073)
Total Stockholders' Equity	371,547	355,226
Total Liabilities and Stockholders' Equity	$ 515,064	$ 530,903