Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock, Common	Total
Balance at the beginning of period at Jun. 30, 2021	$ 811	$ 519,826	$ 1,999,405	$ (9,218)	$ (1,217,307)	$ 1,293,517
Balance at the beginning of period (in shares) at Jun. 30, 2021	81,099,000				31,846,000
Net income			310,991			310,991
Reclassification adjustment for realized gain (loss) on foreign currency translation adjustments				296		296
Reclassification adjustment for loss on interest rate swap				6,695		6,695
Stock-based compensation		23,247				23,247
Net activity from stock-based compensation awards	$ 7	8,872			$ (2,834)	6,045
Net activity from stock-based compensation awards (in shares)	697,000				82,000
Proceeds from stock issued under Colleague Stock Purchase Plan		(97)			$ 692	$ 595
Proceeds from stock issued under Colleague Stock Purchase Plan (in shares)					(19,000)	(18,328)
Repurchases of common stock for treasury					$ (120,000)	$ (120,000)
Repurchases of common stock for treasury (in shares)					4,710,000
Equity forward contract		(30,000)				(30,000)
Balance at the end of period at Jun. 30, 2022	$ 818	521,848	2,310,396	(2,227)	$ (1,339,449)	1,491,386
Balance at the end of period (in shares) at Jun. 30, 2022	81,796,000				36,619,000
Net income			93,358			93,358
Reclassification adjustment for realized gain (loss) on foreign currency translation adjustments						0
Reclassification adjustment for loss on interest rate swap						0
Stock-based compensation		14,299				14,299
Net activity from stock-based compensation awards	$ 4	2,621			$ (4,592)	(1,967)
Net activity from stock-based compensation awards (in shares)	436,000				115,000
Proceeds from stock issued under Colleague Stock Purchase Plan		(7)	(4)		$ 687	$ 676
Proceeds from stock issued under Colleague Stock Purchase Plan (in shares)					(19,000)	(18,463)
Settlement of equity forward contract		30,000			$ (43,162)	$ (13,162)
Repurchases of common stock for treasury					$ (127,254)	(127,254)
Repurchases of common stock for treasury (in shares)					3,207,000
Balance at the end of period at Jun. 30, 2023	$ 822	568,761	2,403,750	(2,227)	$ (1,513,770)	$ 1,457,336
Balance at the end of period (in shares) at Jun. 30, 2023	82,232,000				39,922,000	42,310,000
Net income			136,777			$ 136,777
Reclassification adjustment for realized gain (loss) on foreign currency translation adjustments						0
Reclassification adjustment for loss on interest rate swap						0
Stock-based compensation		25,947				25,947
Net activity from stock-based compensation awards	$ 10	17,078			$ (7,731)	9,357
Net activity from stock-based compensation awards (in shares)	962,000				165,000
Proceeds from stock issued under Colleague Stock Purchase Plan		163	(18)		$ 756	$ 901
Proceeds from stock issued under Colleague Stock Purchase Plan (in shares)					(20,000)	(19,666)
Repurchases of common stock for treasury					$ (261,183)	$ (261,183)
Repurchases of common stock for treasury (in shares)					5,446,000
Balance at the end of period at Jun. 30, 2024	$ 832	$ 611,949	$ 2,540,509	$ (2,227)	$ (1,781,928)	$ 1,369,135
Balance at the end of period (in shares) at Jun. 30, 2024	83,194,000				45,513,000	37,681,000