Consolidated Statement Of Stockholders' Equity (Unaudited) - 6 months ended Dec. 31, 2017 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Jun. 30, 2017	$ 1,712,832	$ 1,080	$ 1,137,724	$ 868,822	$ (99,315)	$ (195,479)
Balance, shares at Jun. 30, 2017	107,989	107,989			4,287
Increase (Decrease) in Stockholders' Equity
Net income	$ 66,949			66,949
Other comprehensive income (loss)	42,128					42,128
Issuance of common stock pursuant to stock-based compensation plans	0	$ 4	(4)
Issuance of common stock pursuant to stock-based compensation plans, shares		382
Shares withheld for payment of employee payroll taxes due on shares issued under stock-based compensation plans	(6,685)				$ (6,685)
Shares withheld for payment of employee payroll taxes due on shares issued under stock based compensation plans, shares					166
Stock-based compensation expense	7,322		7,322
Balance at Dec. 31, 2017	$ 1,822,546	$ 1,084	$ 1,145,042	$ 935,771	$ (106,000)	$ (153,351)
Balance, shares at Dec. 31, 2017	108,371	108,371			4,453