CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands		Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)(1)		Retained Earnings (Deficit)	Treasury Stock
Beginning Balances, (in shares) at Jun. 30, 2020			228,207,000					35,478,000
Beginning Balances, Value at Jun. 30, 2020		$ 24,802	$ 2,282	$ 772,943	$ (39,781)	[1]	$ (18,455)	$ (692,187)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		(62,256)					(62,256)
Other comprehensive income (loss)		8,816			8,816	[1]
Stock-based compensation		7,259		7,259
Stock-based awards exercised or vested		927		(2,613)			(636)	$ 4,176
Stock-based awards exercised or vested (in shares)								215,000
Acquisition of treasury shares (in shares)	[2]							(42,000)
Acquisition of treasury shares(2)	[2]	(596)						$ (596)
Repurchase and retirement of common shares (in shares)			(5,957,000)
Repurchase and retirement of common shares		(88,458)	$ (60)	(3,514)			(84,884)
Cash dividends declared - $0.27 per share		(50,154)					(50,154)
Ending Balances, (in shares) at Sep. 30, 2020			222,250,000					35,305,000
Ending Balances, Value at Sep. 30, 2020		$ (159,660)	$ 2,222	774,075	(30,965)	[1]	(216,385)	$ (688,607)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in usd per share)		$ 0.26
Beginning Balances, (in shares) at Jun. 30, 2020			228,207,000					35,478,000
Beginning Balances, Value at Jun. 30, 2020		$ 24,802	$ 2,282	772,943	(39,781)	[1]	(18,455)	$ (692,187)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		440,240
Ending Balances, (in shares) at Mar. 31, 2021			216,656,000					35,191,000
Ending Balances, Value at Mar. 31, 2021		$ 186,868	$ 2,167	781,692	(5,028)		94,409	$ (686,372)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in usd per share)		$ 0.78
Beginning Balances, (in shares) at Sep. 30, 2020			222,250,000					35,305,000
Beginning Balances, Value at Sep. 30, 2020		$ (159,660)	$ 2,222	774,075	(30,965)	[1]	(216,385)	$ (688,607)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		(255,751)					(255,751)
Other comprehensive income (loss)		21,982			21,982
Stock-based compensation		5,181		5,181
Stock-based awards exercised or vested		(210)		(134)			(220)	$ 144
Stock-based awards exercised or vested (in shares)								8,000
Acquisition of treasury shares (in shares)								(3,000)
Acquisition of treasury shares(2)		(44)						$ (44)
Repurchase and retirement of common shares (in shares)			(3,531,000)
Repurchase and retirement of common shares		(61,684)	$ (35)	(2,083)			(59,566)
Cash dividends declared - $0.27 per share		(47,689)					(47,689)
Ending Balances, (in shares) at Dec. 31, 2020			218,719,000					35,300,000
Ending Balances, Value at Dec. 31, 2020		$ (497,875)	$ 2,187	777,039	(8,983)		(579,611)	$ (688,507)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in usd per share)		$ 0.26
Net income		$ 758,247					758,247
Other comprehensive income (loss)		3,955			3,955
Stock-based compensation		6,943		6,943
Stock-based awards exercised or vested		889		(1,071)			(214)	$ 2,174
Stock-based awards exercised or vested (in shares)								111,000
Acquisition of treasury shares (in shares)								(2,000)
Acquisition of treasury shares(2)		(39)						$ (39)
Repurchase and retirement of common shares (in shares)			(2,063,000)
Repurchase and retirement of common shares		(38,071)	$ (20)	(1,219)			(36,832)
Cash dividends declared - $0.27 per share		(47,181)					(47,181)
Ending Balances, (in shares) at Mar. 31, 2021			216,656,000					35,191,000
Ending Balances, Value at Mar. 31, 2021		$ 186,868	$ 2,167	781,692	(5,028)		94,409	$ (686,372)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in usd per share)		$ 0.26
Beginning Balances, (in shares) at Jun. 30, 2021			216,656,000					34,842,000
Beginning Balances, Value at Jun. 30, 2021		$ 388,058	$ 2,167	779,465	88	[1]	286,694	$ (680,356)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		(151,601)					(151,601)
Other comprehensive income (loss)		(11,177)			(11,177)	[1]
Stock-based compensation		5,627		5,627
Stock-based awards exercised or vested		3,146		(10,328)			(291)	$ 13,765
Stock-based awards exercised or vested (in shares)								705,000
Acquisition of treasury shares (in shares)	[2]							(205,000)
Acquisition of treasury shares(2)	[2]	(4,817)						$ (4,817)
Repurchase and retirement of common shares (in shares)			(6,802,000)
Repurchase and retirement of common shares		(165,768)	$ (68)	(4,081)			(161,619)
Cash dividends declared - $0.27 per share		(47,940)					(47,940)
Ending Balances, (in shares) at Sep. 30, 2021			209,854,000					34,342,000
Ending Balances, Value at Sep. 30, 2021		$ 15,528	$ 2,099	770,683	(11,089)	[1]	(74,757)	$ (671,408)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in usd per share)		$ 0.27
Beginning Balances, (in shares) at Jun. 30, 2021			216,656,000					34,842,000
Beginning Balances, Value at Jun. 30, 2021		$ 388,058	$ 2,167	779,465	88	[1]	286,694	$ (680,356)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		330,971
Ending Balances, (in shares) at Mar. 31, 2022			193,571,000					33,979,000
Ending Balances, Value at Mar. 31, 2022		$ 44,856	$ 1,936	767,869	(3,838)	[1]	(56,790)	$ (664,321)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in usd per share)		$ 0.81
Beginning Balances, (in shares) at Sep. 30, 2021			209,854,000					34,342,000
Beginning Balances, Value at Sep. 30, 2021		$ 15,528	$ 2,099	770,683	(11,089)	[1]	(74,757)	$ (671,408)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		(190,605)					(190,605)
Other comprehensive income (loss)		1,656			1,656	[1]
Stock-based compensation		5,640		5,640
Stock-based awards exercised or vested		472		(1,709)			(219)	$ 2,400
Stock-based awards exercised or vested (in shares)								122,000
Acquisition of treasury shares (in shares)								(2,000)
Acquisition of treasury shares(2)		(52)						$ (52)
Repurchase and retirement of common shares (in shares)			(6,589,000)
Repurchase and retirement of common shares		(158,797)	$ (66)	(3,953)			(154,778)
Cash dividends declared - $0.27 per share		(46,497)					(46,497)
Ending Balances, (in shares) at Dec. 31, 2021			203,265,000					34,222,000
Ending Balances, Value at Dec. 31, 2021		$ (372,655)	$ 2,033	770,661	(9,433)	[1]	(466,856)	$ (669,060)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in usd per share)		$ 0.27
Net income		$ 673,177					673,177
Other comprehensive income (loss)		5,595			5,595	[1]
Stock-based compensation		5,619		5,619
Stock-based awards exercised or vested		1,975		(2,595)			(201)	$ 4,771
Stock-based awards exercised or vested (in shares)								244,000
Acquisition of treasury shares (in shares)								(1,000)
Acquisition of treasury shares(2)		(32)						$ (32)
Repurchase and retirement of common shares (in shares)			(9,694,000)
Repurchase and retirement of common shares		(225,781)	$ (97)	(5,816)			(219,868)
Cash dividends declared - $0.27 per share		(43,042)					(43,042)
Ending Balances, (in shares) at Mar. 31, 2022			193,571,000					33,979,000
Ending Balances, Value at Mar. 31, 2022		$ 44,856	$ 1,936	$ 767,869	$ (3,838)	[1]	$ (56,790)	$ (664,321)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in usd per share)		$ 0.27

[1] The balance of our accumulated other comprehensive income (loss) consists of foreign currency translation adjustments.

[2] Represents shares swapped or surrendered to us in connection with the vesting or exercise of stock-based awards.