Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Operating activities:
Net income (loss)	$ (176)us-gaap_ProfitLoss	$ 16,863us-gaap_ProfitLoss
Adjustments to reconcile net income to net cash provided (used) by operating activities:
Depreciation and amortization	11,540	7,551
Deferred income tax	1,011us-gaap_DeferredIncomeTaxExpenseBenefit	(2,102)us-gaap_DeferredIncomeTaxExpenseBenefit
Gain on sale of property, plant and equipment	(120)	(57)
Provision for uncollectible accounts	451us-gaap_ProvisionForDoubtfulAccounts	(36)us-gaap_ProvisionForDoubtfulAccounts
Stock-based compensation expense	3,168us-gaap_ShareBasedCompensation	2,515us-gaap_ShareBasedCompensation
Excess Tax Benefit from Share-based Compensation, Operating Activities	(1,731)	1,069
Other	118us-gaap_OtherNoncashIncomeExpense	100us-gaap_OtherNoncashIncomeExpense
Changes in operating assets and liabilities increasing (decreasing) cash, net of effects from acquisitions:
Accounts receivable	(9,243)	11,665
Costs and estimated earnings in excess of billings on uncompleted contracts	3,435	(4,835)
Inventories	32us-gaap_IncreaseDecreaseInInventories	(159)us-gaap_IncreaseDecreaseInInventories
Other assets and liabilities	3,247	(123)
Accounts payable	(19,429)	32,712
Billings on uncompleted contracts in excess of costs and estimated earnings	19,174	(9,525)
Accrued expenses	(6,099)	(5,174)
Net cash provided by operating activities	5,378	50,464
Investing activities:
Acquisition of property, plant and equipment	(7,711)	(11,965)
Acquisition, net of cash acquired	(5,551)	(51,398)
Proceeds from asset sales	290	326
Net cash used by investing activities	(12,972)	(63,037)
Financing activities:
Issuances of common stock	364	602
Excess tax benefit of exercised stock options and vesting of deferred shares	1,731	6
Advances under credit agreement	9,272	33,318
Repayments of advances under credit agreement	(9,104)	(10,127)
Proceeds received for treasury shares sold to Employee Stock Purchase Plan	134us-gaap_ProceedsFromStockPlans	38us-gaap_ProceedsFromStockPlans
Treasury shares purchased from employees to satisfy tax withholding obligations	(2,439)	(1,638)
Net cash provided (used) by financing activities	(42)	22,199
Effect of exchange rate changes on cash	(911)	(84)
Net increase (decrease) in cash and cash equivalents	(8,547)	9,542
Cash and cash equivalents, beginning of period	77,115	63,750
Cash and cash equivalents, end of period	68,568	73,292
Supplemental disclosure of cash flow information:
Income taxes	5,905us-gaap_IncomeTaxesPaidNet	6,812us-gaap_IncomeTaxesPaidNet
Interest	748us-gaap_InterestPaid	462us-gaap_InterestPaid
Non-cash investing and financing activities:
Purchases of property, plant and equipment on account	$ 185	$ 1,079

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The cash inflow associated with the amount received from the stock plan during the period.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

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The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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