Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating activities:
Net income (loss)	$ 1,092	$ 16,403
Adjustments to reconcile net income to net cash used by operating activities, net of effects from acquisitions:
Depreciation and amortization	15,839	16,139
Deferred income tax	(4,665)	1,413
Gain on sale of property, plant and equipment	(366)	(111)
Provision for uncollectible accounts	900	5,684
Stock-based compensation expense	5,467	5,023
Other	211	179
Changes in operating assets and liabilities increasing (decreasing) cash, net of effects from acquisitions:
Accounts receivable	(23,531)	23,684
Costs and estimated earnings in excess of billings on uncompleted contracts	34,761	(6,575)
Inventories	9	568
Other assets and liabilities	(9,668)	(5,461)
Accounts payable	(45,690)	(3,492)
Billings on uncompleted contracts in excess of costs and estimated earnings	5,449	(29,895)
Accrued expenses	(5,417)	983
Net cash provided (used) by operating activities	(25,609)	24,542
Investing activities:
Acquisition, net of cash acquired	(40,819)	(13,049)
Acquisition of property, plant and equipment	(8,475)	(11,746)
Proceeds from asset sales	1,145	258
Net cash used by investing activities	(48,149)	(24,537)
Financing activities:
Advances under senior revolving credit facility	106,168	2,753
Repayments of advances under senior revolving credit facility	(62,029)	(7,712)
Payments of debt issuance costs	(822)	0
Open market purchase of treasury shares	0	(5,460)
Issuances of common stock	234	578
Proceeds from issuance of common stock under employee stock purchase plan	253	261
Repurchase of common stock for payment of statutory taxes due on equity-based compensation	(2,288)	(4,540)
Capital contributions from noncontrolling interest	855	10,892
Repayments of acquired long-term debt	0	(1,858)
Net cash provided (used) by financing activities	42,371	(5,086)
Effect of exchange rate changes on cash and cash equivalents	(572)	(755)
Decrease in cash and cash equivalents	(31,959)	(5,836)
Cash and cash equivalents, beginning of period	71,656	79,239
Cash and cash equivalents, end of period	39,697	73,403
Supplemental disclosure of cash flow information:
Income taxes	11,679	9,192
Interest	1,266	789
Non-cash investing and financing activities:
Purchases of property, plant and equipment on account	846	401
Acquisition of long-term debt	$ 0	$ 1,858