Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Operating Activities:
Net income	$ 26,794	$ 23,508
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	7,770	6,523
Amortization	658	1,252
Gain on sale of discontinued operations, net of tax	(8,563)
Stock-based compensation	2,865	3,247
Bad debt expense/(recovery)	616	(310)
Deferred income tax benefit	(2,682)	(287)
Gain on amended supply agreement	(1,014)
Cash received from amended supply agreement	10,000
Changes in operating assets and liabilities:
Accounts receivable, net	(11,598)	12,777
Costs and billings in excess of estimates on uncompleted contracts	(16,658)	42,692
Inventories	347	1,976
Prepaid expenses and other current assets	335	(2,216)
Accounts payable and income taxes payable	(16,650)	6,763
Accrued liabilities	(8,769)	(6,035)
Other, net	1,936	(1,224)
Net cash provided by (used in) operating activities	(14,613)	88,666
Investing Activities:
Proceeds from sale of property, plant and equipment	118	711
Proceeds from sale of Transdyn	14,819
Purchases of property, plant and equipment	(11,296)	(53,728)
Net cash provided by (used in) investing activities	3,641	(53,017)
Financing Activities:
Payments on industrial development revenue bonds	(400)	(400)
Taxes on stock-based compensation	(451)
Dividends paid	(8,995)
Payments on short-term and other financing	(16)	(316)
Net cash used in financing activities	(9,862)	(716)
Net increase (decrease) in cash and cash equivalents	(20,834)	34,933
Effect of exchange rate changes on cash and cash equivalents	1,186	(108)
Cash and cash equivalents, beginning of period	107,411	90,040
Cash and cash equivalents, end of period	$ 87,763	$ 124,865