Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income	$ 19,862	$ 27,086
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	23,254	18,939
Stock-based compensation expense	9,963	9,448
Benefit for deferred income taxes	(1,943)	(4,833)
Other non-cash items	2,144	847
Changes in operating assets and liabilities, net of effects of businesses acquired:
Accounts receivable, unbilled receivable, and cost in excess of billings	(20,845)	(9,181)
Inventory	(9,422)	(22,455)
Prepaid income taxes	2,995	1,414
Prepaid expenses and other current assets	(340)	(1,970)
Other non-current assets	118	(2,507)
Accounts payable and accrued expenses	7,215	11,597
Deferred revenues and customer advances	9,480	1,976
Income taxes payable	1,872	(11,284)
Other non-current liabilities	977	(2,270)
Net cash provided by operating activities	45,330	16,807
Cash flows from investing activities:
Acquisition of business, net of cash acquired	(45,029)	(5,798)
Purchases of property and equipment	(10,802)	(7,592)
Other investing activities	0	(375)
Net cash used in investing activities	(55,831)	(13,765)
Cash flows from financing activities:
Proceeds from employee stock plans	1,677	2,049
Borrowings under credit facilities	45,000	15,000
Repayments of Long-term Lines of Credit	0	(15,000)
Payments for retirement of common stock	(6,932)	(14,909)
Payments of deferred financing and offering costs	(1,851)	0
Net cash provided by (used in) financing activities	37,894	(12,860)
Effect of exchange rate changes on cash and cash equivalents	(11)	216
Net increase (decrease) in cash and cash equivalents	27,382	(9,602)
Cash and cash equivalents at beginning of period	66,521	41,637
Cash and cash equivalents at end of period	93,903	32,035
Cash paid during the period for:
Interest	5,648	111
Income taxes	$ 4,308	$ 9,928