Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Operating Activities:
Net income	$ 17,804	$ 4,237
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation	7,703	7,790
Amortization	2,121	3,708
Stock-based compensation	894	1,117
Bad debt expense	509	82
Deferred income taxes	(273)	(5,440)
Gain on sale of investment		(1,229)
Changes in operating assets and liabilities:
Accounts receivable	2,071	(14,151)
Costs and estimated earnings in excess of billings on uncompleted contracts	(35,423)	(4,862)
Inventories	(3,961)	(2,612)
Prepaid expenses and other current assets	7,109	3,795
Accounts payable and income taxes payable	(1,257)	7,462
Accrued liabilities	490	(10,910)
Billings in excess of costs and estimated earnings on uncompleted contracts	8,880	33,511
Other	(208)	2,743
Net cash provided by operating activities	6,459	25,241
Investing Activities:
Proceeds from sale of fixed assets	158	308
Purchases of property, plant and equipment	(25,546)	(4,072)
Decrease in cash held in escrow	1,000	0
Proceeds from sale of investment in joint venture		1,229
Net cash used in investing activities	(24,388)	(2,535)
Financing Activities:
Borrowings on Canadian revolving line of credit	7,992	4,947
Payments on Canadian revolving line of credit	(7,992)	(4,955)
Payments on industrial development revenue bonds	(400)	(400)
Short-term and other financing	1,822	(250)
Net cash provided by (used in) financing activities	1,422	(658)
Net (decrease) increase in cash and cash equivalents	(16,507)	22,048
Effect of exchange rate changes on cash and cash equivalents	(124)	(135)
Cash and cash equivalents at beginning of period	123,466	115,353
Cash and cash equivalents at end of period	$ 106,835	$ 137,266