Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 33,971	$ 30,782
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	34,830	30,320
Stock-based compensation expense	14,836	13,045
Benefit for deferred income taxes	(1,054)	(5,482)
Other non-cash items	2,715	1,243
Changes in operating assets and liabilities, net of effects of businesses acquired:
Accounts receivable, unbilled receivable, and cost in excess of billings	(22,081)	(19,827)
Inventory	(13,770)	(24,931)
Prepaid income taxes	3,761	(1,060)
Prepaid expenses and other current assets	(724)	944
Other non-current assets	137	277
Accounts payable and accrued expenses	15,610	2,943
Deferred revenues and customer advances	(2,065)	2,758
Income taxes payable	4,795	(11,286)
Other non-current liabilities	587	(2,046)
Net cash provided by operating activities	71,548	17,680
Cash flows from investing activities:
Acquisition of business, net of cash acquired	(81,529)	(185,396)
Purchases of property and equipment	(17,862)	(11,067)
Other investing activities	0	(375)
Net cash used in investing activities	(99,391)	(196,838)
Cash flows from financing activities:
Proceeds from employee stock plans	1,677	2,049
Borrowings under credit facilities	81,500	210,000
Repayments of Long-term Lines of Credit	0	(15,000)
Payments for retirement of common stock	(7,434)	(15,118)
Payments of deferred financing and offering costs	(1,851)	0
Net cash provided by financing activities	73,892	181,931
Effect of exchange rate changes on cash and cash equivalents	(55)	(193)
Net increase in cash and cash equivalents	45,994	2,580
Cash and cash equivalents at beginning of period	66,521	41,637
Cash and cash equivalents at end of period	112,515	44,217
Cash paid during the period for:
Interest	8,163	1,101
Income taxes	$ 5,179	$ 9,928