Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Operating activities:
Net income	$ 10,540	$ 8,376
Adjustments to reconcile net income to net cash provided (used) by operating activities:
Depreciation and amortization	5,738	5,523
Deferred income tax	(28)	2,183
Loss (gain) on sale of property, plant and equipment	(43)	15
Allowance for uncollectible accounts	29	301
Stock-based compensation expense	1,735	1,031
Other	(28)	(41)
Changes in operating assets and liabilities increasing (decreasing) cash:
Accounts receivable	(12,241)	(22,923)
Costs and estimated earnings in excess of billings on uncompleted contracts	(16,474)	3,968
Inventories	(332)	1,050
Other assets	(1,561)	1,498
Accounts payable	12,565	(10,425)
Billings on uncompleted contracts in excess of costs and estimated earnings	(3,669)	10,724
Accrued expenses	(2,059)	(3,882)
Net cash used by operating activities	(5,828)	(2,602)
Investing activities:
Acquisition of property, plant and equipment	(6,759)	(4,529)
Proceeds from asset sales	177	84
Net cash used by investing activities	(6,582)	(4,445)
Financing activities:
Issuances of common stock	80	44
Capital lease payments	(182)	(413)
Tax benefit of exercised stock options		25
Payment of debt amendment fees	(573)	(216)
Treasury shares purchased by Employee Stock Purchase Plan	27
Open market purchase of treasury shares	(8,126)
Other treasury share purchases	(439)	(269)
Net cash used by financing activities	(9,213)	(829)
Effect of exchange rate changes on cash	(292)	661
Net decrease in cash and cash equivalents	(21,915)	(7,215)
Cash and cash equivalents, beginning of period	59,357	50,899
Cash and cash equivalents, end of period	37,442	43,684
Supplemental disclosure of cash flow information:
Income taxes	3,640	1,695
Interest	279	281
Non-cash investing and financing activities:
Purchases of property, plant and equipment on account	$ 637	$ 1,501