Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income	$ 40,883	$ 24,875	$ 19,742
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	42,277	32,269	15,742
Stock-based compensation expense	17,314	15,341	9,574
Deferred income taxes	(5,464)	(7,841)	(3,061)
Impairment of Long-Lived Assets Held-for-use	0	0	231
Non-cash interest expense	0	1,810	301
Other non-cash items	2,103	(626)	(722)
Changes in operating assets and liabilities, net of effects of businesses acquired:
Accounts receivable, unbilled receivable, and cost in excess of billings	(22,751)	(14,054)	(25,396)
Inventory	(16,230)	(9,318)	(865)
Prepaid income taxes	(2,327)	1,978	346
Prepaid expenses and other current assets	(361)	(1,270)	2,964
Other non-current assets	296	372	(778)
Accounts payable and accrued expenses	(5,267)	3,520	18,871
Deferred revenues and customer advances	6,035	(1,621)	(194)
Income taxes payable	(11,187)	9,622	253
Other non-current liabilities	(2,000)	4,089	(68)
Net cash provided by operating activities	43,321	59,146	36,940
Cash flows from investing activities:
Acquisition of businesses, net of cash acquired	(185,396)	(77,757)	(309,756)
Purchases of property and equipment	(15,106)	(32,844)	(7,885)
Other investing activities	(375)	(486)	(567)
Net cash used in investing activities	(200,877)	(111,087)	(318,208)
Cash flows from financing activities:
Proceeds from Issuance of Common Stock	0	215,725	92,778
Proceeds from employee stock plans	3,445	4,970	8,097
Stock Repurchased and Retired During Period, Value	(15,508)	(8,766)	(7,955)
Borrowings under credit facilities	210,000	0	194,900
Payments of debt issuance costs	0	(591)	(2,926)
Payments of term debt	(15,000)	(200,000)	0
Net cash provided by financing activities	182,937	11,338	284,894
Effect of exchange rate changes on cash and cash equivalents	(497)	549	479
Net increase (decrease) in cash and cash equivalents	24,884	(40,054)	4,105
Cash and cash equivalents at beginning of year	41,637	81,691	77,586
Cash and cash equivalents at end of year	66,521	41,637	81,691
Cash paid during the period for:
Interest	1,607	5,758	1,041
Income taxes	17,004	2,834	7,975
Supplemental disclosures-non-cash activities:
Share-based business combination consideration	$ 0	$ 0	$ 407