Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Jun. 30, 2016	$ 1,664,514	$ 1,075	$ 1,123,206	$ 801,392	$ (89,048)	$ (172,111)
Beginning balance, shares at Jun. 30, 2016		107,479			4,018,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	67,430			67,430
Other comprehensive income (loss)	(23,368)					(23,368)
Issuance of common stock pursuant to stock-based compensation plans	1	$ 5	1,995		$ (1,999)
Issuance of common stock pursuant to compensation plans, shares		510			52,000
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					217,000
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			4,287,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	9,694			9,694
Other comprehensive income (loss)	11,239					11,239
Issuance of common stock pursuant to stock-based compensation plans	0	$ 4	(4)
Issuance of common stock pursuant to compensation plans, shares		433
Shares withheld for payment of employee payroll taxes due on shares issued under stock-based compensation plans	(7,192)				$ (7,192)
Shares withheld for payment of employee payroll taxes due on shares issued under stock-based compensation plans, shares					183,000
Stock-based compensation expense	10,476		10,476
Ending balance at Jun. 30, 2018	$ 1,737,049	$ 1,084	1,148,196	878,516	$ (106,507)	(184,240)
Ending balance, shares at Jun. 30, 2018	108,422,000	108,422			4,470,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	$ (183,314)			(183,314)
Other comprehensive income (loss)	(41,112)					(41,112)
Issuance of common stock pursuant to stock-based compensation plans	0	$ 4	(4)
Issuance of common stock pursuant to compensation plans, shares		411
Shares withheld for payment of employee payroll taxes due on shares issued under stock-based compensation plans	(3,532)				$ (3,532)
Shares withheld for payment of employee payroll taxes due on shares issued under stock-based compensation plans, shares					144,000
Stock-based compensation expense	10,065		10,065
Ending balance at Jun. 30, 2019	$ 1,519,319	$ 1,088	$ 1,158,257	$ 695,017	$ (110,039)	$ (225,004)
Ending balance, shares at Jun. 30, 2019	108,833,000	108,833			4,614,000