Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating activities:
Net income	$ 6,552	$ 4,684
Adjustments to reconcile net income to net cash provided (used) by operating activities:
Depreciation and amortization	3,720	2,826
Deferred income tax	(111)	98
Gain on sale of property, plant and equipment	(36)	(33)
Allowance for uncollectible accounts	(13)	705
Stock-based compensation expense	1,087	866
Other	49	8
Changes in operating assets and liabilities increasing (decreasing) cash:
Accounts receivable	(9,620)	(49,515)
Increase (Decrease) in Cost in Excess of Billing on Uncompleted Contract	(7,095)	9,036
Inventories	(184)	(785)
Other assets	(1,048)	(1,292)
Accounts payable	(1,111)	12,541
Billings on uncompleted contracts in excess of costs and estimated earnings	12,935	15,344
Accrued expenses	(865)	2,591
Net cash provided (used) by operating activities	18,450	(20,998)
Investing activities:
Acquisition of property, plant and equipment	(5,763)	(5,092)
Proceeds from asset sales	279	37
Net cash used by investing activities	(5,484)	(5,055)
Financing activities:
Issuances of common stock	356	61
Capital lease payments	0	(22)
Excess tax benefit of exercised stock options and vesting of deferred shares	4	30
Advances under credit agreement	8,975	7,828
Repayments of advances under credit agreement	(6,549)	(4,473)
Treasury shares purchased by Employee Stock Purchase Plan	18	8
Other treasury share purchases	(4)	(350)
Net cash provided (used) by financing activities	2,800	3,082
Effect of exchange rate changes on cash	246	415
Net decrease in cash and cash equivalents	16,012	(22,556)
Cash and cash equivalents, beginning of period	63,750	39,726
Cash and cash equivalents, end of period	79,762	17,170
Supplemental disclosure of cash flow information:
Income taxes	58	776
Interest	146	126
Non-cash investing and financing activities:
Purchases of property, plant and equipment on account	$ 1,095	$ 649