Consolidated Statement of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Jun. 30, 2014	$ 1,580,825	$ 1,031	$ 970,817	$ 589,001	$ (40,092)	$ 60,068
Beginning balance, shares at Jun. 30, 2014		103,143			2,906
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	164,962			164,962
Other comprehensive income (loss)	(101,699)					(101,699)
Issuance of common stock pursuant to compensation plans	26,085	$ 20	26,065
Issuance of common stock pursuant to compensation plans, shares		1,968
Issuance of common stock in connection with acquisitions	34,136	$ 7	34,129
Issuance of common stock in connection with acquisitions, shares		730
Stock based compensation income tax effects	29,219		29,219
Shares withheld for payment of employee payroll taxes due on shares issued under stock based compensation plans	(18,058)				$ (18,058)
Shares withheld for payment of employee payroll taxes due on shares issued under stock based compensation plans, shares					323
Stock based compensation expense	12,197		12,197
Ending balance at Jun. 30, 2015	1,727,667	$ 1,058	1,072,427	753,963	$ (58,150)	(41,631)
Ending balance, shares at Jun. 30, 2015		105,841			3,229
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	47,429			47,429
Other comprehensive income (loss)	(130,480)					(130,480)
Issuance of common stock pursuant to compensation plans	4,400	$ 14	9,749		$ (5,363)
Issuance of common stock pursuant to compensation plans, shares		1,398			151
Issuance of common stock in connection with acquisitions	16,308	$ 3	16,305
Issuance of common stock in connection with acquisitions, shares		240
Stock based compensation income tax effects	12,037		12,037
Shares withheld for payment of employee payroll taxes due on shares issued under stock based compensation plans	(25,535)				$ (25,535)
Shares withheld for payment of employee payroll taxes due on shares issued under stock based compensation plans, shares					638
Stock based compensation expense	12,688		12,688
Ending balance at Jun. 30, 2016	$ 1,664,514	$ 1,075	1,123,206	801,392	$ (89,048)	(172,111)
Ending balance, shares at Jun. 30, 2016	107,479	107,479			4,018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 67,430			67,430
Other comprehensive income (loss)	(23,368)					(23,368)
Issuance of common stock pursuant to compensation plans	1	$ 5	1,995		$ (1,999)
Issuance of common stock pursuant to compensation plans, shares		510			52
Stock based compensation income tax effects	2,865		2,865
Shares withheld for payment of employee payroll taxes due on shares issued under stock based compensation plans	(8,268)				$ (8,268)
Shares withheld for payment of employee payroll taxes due on shares issued under stock based compensation plans, shares					217
Stock based compensation expense	9,658		9,658
Ending balance at Jun. 30, 2017	$ 1,712,832	$ 1,080	$ 1,137,724	$ 868,822	$ (99,315)	$ (195,479)
Ending balance, shares at Jun. 30, 2017	107,989	107,989			4,287