Recent Accounting Pronouncements Impact of Adoption of ASC 606 on Previously Reported Statement of Income (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
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
Accounting Standards Update 2014-09 [Member]
REVENUE		$ (17,547)		$ (16,197)
EXPENSES
Cost of Revenue		(4,553)		(5,352)
Research and Development		0		0
Selling, General and Administrative		(2,519)		(5,165)
Gain on Disposal of a Business		0		0
Total Expenses		(7,072)		(10,517)
OPERATING INCOME		(10,475)		(5,680)
INTEREST INCOME (EXPENSE)
Interest income		0		0
Interest Expense		0		0
Total interest income (expense)		0		0
INCOME BEFORE INCOME TAXES		(10,475)		(5,680)
PROVISION/ (BENEFIT) FOR INCOME TAXES		(16,144)		(14,808)
NET INCOME		5,669		9,128
Previously Reported [Member]
REVENUE		374,756		734,690
EXPENSES
Cost of Revenue		211,653		416,368
Research and Development		22,414		43,343
Selling, General and Administrative		45,613		89,346
Gain on Disposal of a Business		(189)		(1,894)
Total Expenses		279,491		547,163
OPERATING INCOME		95,265		187,527
INTEREST INCOME (EXPENSE)
Interest income		146		293
Interest Expense		(250)		(439)
Total interest income (expense)		(104)		(146)
INCOME BEFORE INCOME TAXES		95,161		187,381
PROVISION/ (BENEFIT) FOR INCOME TAXES		(60,413)		(31,604)
NET INCOME		$ 155,574		$ 218,985
Earnings Per Share
Basic earnings per share		$ 2.01		$ 2.83
Diluted earnings per share		$ 2.01		$ 2.82