CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
REVENUE	$ 386,275	$ 357,209	$ 778,818	$ 718,493
EXPENSES
Cost of Revenue	227,284	207,100	447,396	411,016
Research and Development	23,990	22,414	48,016	43,343
Selling, General and Administrative	46,797	43,094	91,979	84,181
Gain on Disposal of a Business	0	189	0	1,894
Total Expenses	298,071	272,419	587,391	536,646
OPERATING INCOME	88,204	84,790	191,427	181,847
INTEREST INCOME (EXPENSE)
Interest income	252	146	542	293
Interest expense	(148)	(250)	(295)	(439)
Total interest income (expense)	104	(104)	247	(146)
INCOME BEFORE INCOME TAXES	88,308	84,686	191,674	181,701
PROVISION/ (BENEFIT) FOR INCOME TAXES	20,219	(76,557)	40,034	(46,412)
NET INCOME	$ 68,089	$ 161,243	$ 151,640	$ 228,113
Earnings Per Share
Basic earnings per share	$ 0.88	$ 2.09	$ 1.96	$ 2.95
Basic weighted average shares outstanding	77,216	77,218	77,202	77,250
Diluted earnings per share	$ 0.88	$ 2.08	$ 1.96	$ 2.94
Diluted weighted average shares outstanding	77,409	77,565	77,474	77,606