Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ 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, 2022	$ 818	$ 521,848	$ 2,310,396	$ (2,227)	$ (1,339,449)	$ 1,491,386
Balance at the beginning of period (in shares) at Jun. 30, 2022	81,796				36,619
Net income			71,114			71,114
Stock-based compensation		10,908				10,908
Net activity from stock-based compensation awards	$ 4	1,617			$ (4,214)	(2,593)
Net activity from stock-based compensation awards (in shares)	375				105
Proceeds from stock issued under Colleague Stock Purchase Plan		(10)	(4)		$ 516	502
Proceeds from stock issued under Colleague Stock Purchase Plan (in shares)					(14)
Settlement of equity forward contract		30,000			$ (43,162)	(13,162)
Repurchases of common stock for treasury					$ (47,770)	(47,770)
Repurchases of common stock for treasury (in shares)					1,229
Balance at the end of period at Mar. 31, 2023	$ 822	564,363	2,381,506	(2,227)	$ (1,434,079)	1,510,385
Balance at the end of period (in shares) at Mar. 31, 2023	82,171				37,939
Balance at the beginning of period at Dec. 31, 2022	$ 822	561,376	2,335,641	(2,227)	$ (1,386,395)	1,509,217
Balance at the beginning of period (in shares) at Dec. 31, 2022	82,156				36,713
Net income			45,869			45,869
Stock-based compensation		2,795				2,795
Net activity from stock-based compensation awards		199			$ (106)	93
Net activity from stock-based compensation awards (in shares)	15				2
Proceeds from stock issued under Colleague Stock Purchase Plan		(7)	(4)		$ 192	181
Proceeds from stock issued under Colleague Stock Purchase Plan (in shares)					(5)
Repurchases of common stock for treasury					$ (47,770)	(47,770)
Repurchases of common stock for treasury (in shares)					1,229
Balance at the end of period at Mar. 31, 2023	$ 822	564,363	2,381,506	(2,227)	$ (1,434,079)	1,510,385
Balance at the end of period (in shares) at Mar. 31, 2023	82,171				37,939
Balance at the beginning of period at Jun. 30, 2023	$ 822	568,761	2,403,750	(2,227)	$ (1,513,770)	$ 1,457,336
Balance at the beginning of period (in shares) at Jun. 30, 2023	82,232				39,922	42,310
Net income			87,358			$ 87,358
Stock-based compensation		19,405				19,405
Net activity from stock-based compensation awards	$ 9	15,402			$ (6,600)	8,811
Net activity from stock-based compensation awards (in shares)	868				147
Proceeds from stock issued under Colleague Stock Purchase Plan		103	(18)		$ 562	647
Proceeds from stock issued under Colleague Stock Purchase Plan (in shares)					(15)
Repurchases of common stock for treasury					$ (252,594)	(252,594)
Repurchases of common stock for treasury (in shares)					5,281
Balance at the end of period at Mar. 31, 2024	$ 831	603,671	2,491,090	(2,227)	$ (1,772,402)	$ 1,320,963
Balance at the end of period (in shares) at Mar. 31, 2024	83,100				45,335	37,765
Balance at the beginning of period at Dec. 31, 2023	$ 831	597,587	2,454,269	(2,227)	$ (1,681,061)	$ 1,369,399
Balance at the beginning of period (in shares) at Dec. 31, 2023	83,092				43,566
Net income			36,821			36,821
Stock-based compensation		5,900				5,900
Net activity from stock-based compensation awards		98			$ (95)	3
Net activity from stock-based compensation awards (in shares)	8				2
Proceeds from stock issued under Colleague Stock Purchase Plan		86			$ 162	248
Proceeds from stock issued under Colleague Stock Purchase Plan (in shares)					(5)
Repurchases of common stock for treasury					$ (91,408)	(91,408)
Repurchases of common stock for treasury (in shares)					1,772
Balance at the end of period at Mar. 31, 2024	$ 831	$ 603,671	$ 2,491,090	$ (2,227)	$ (1,772,402)	$ 1,320,963
Balance at the end of period (in shares) at Mar. 31, 2024	83,100				45,335	37,765