CONSOLIDATED STATEMENTS OF STOCKHOLDERS' (DEFICIT) EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings (Deficit)	Accumulated Other Comprehensive Income	Treasury Stock
Balance at Jun. 30, 2014	$ 83,676	$ 10,103	$ 591,324	$ (264,034)	$ 9,372	$ (263,089)
Balance (in shares) at Jun. 30, 2014		101,033,740				9,371,890
Comprehensive income (loss):
Net income	118,407			118,407
Other comprehensive loss	(2,902)				(2,902)
Exercise of stock options	4,666	$ 31	4,635
Exercise of stock options (in shares)		308,847
Withholding taxes related to restricted stock units net share settlement	(5,657)	$ 27	(5,684)
Withholding taxes related to restricted stock units net share settlement (in shares)		264,933
Repurchase of common stock	$ (298,344)					$ (298,344)
Repurchase of common stock (in shares)	7,731,428					7,731,428
Stock-based compensation	$ 14,584		14,584
Excess tax benefits from stock-based compensation	37,024		37,024
Balance at Jun. 30, 2015	(48,546)	$ 10,161	641,883	(145,627)	6,470	$ (561,433)
Balance (in shares) at Jun. 30, 2015		101,607,520				17,103,318
Comprehensive income (loss):
Net income	139,951			139,951
Other comprehensive loss	(3,819)				(3,819)
Exercise of stock options	3,920	$ 20	3,900
Exercise of stock options (in shares)		201,706
Withholding taxes related to restricted stock units net share settlement	(4,409)	$ 22	(4,431)
Withholding taxes related to restricted stock units net share settlement (in shares)		222,734
Repurchase of common stock	$ (180,066)					$ (180,066)
Repurchase of common stock (in shares)	4,750,692					4,750,692
Stock-based compensation	$ 15,727		15,727
Excess tax benefits from stock-based compensation	2,208		2,208
Balance at Jun. 30, 2016	$ (75,034)	$ 10,203	659,287	(5,676)	2,651	$ (741,499)
Balance (in shares) at Jun. 30, 2016	102,031,960	102,031,960				21,854,010
Comprehensive income (loss):
Net income	$ 162,196			162,196
Other comprehensive loss	(1,192)				(1,192)
Exercise of stock options	9,273	$ 34	9,239
Exercise of stock options (in shares)		332,937
Withholding taxes related to restricted stock units net share settlement	(5,792)	$ 20	(5,812)
Withholding taxes related to restricted stock units net share settlement (in shares)		202,232
Repurchase of common stock	$ (375,000)					$ (375,000)
Repurchase of common stock (in shares)	5,185,257					7,291,966
Stock-based compensation	$ 18,800		18,800
Excess tax benefits from stock-based compensation	5,965		5,965
Balance at Jun. 30, 2017	$ (260,784)	$ 10,257	$ 687,479	$ 156,520	$ 1,459	$ (1,116,499)
Balance (in shares) at Jun. 30, 2017	102,567,129	102,567,129				29,145,976