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 [Member]	Total
Balance at the beginning of period at Jun. 30, 2021	$ 811	$ 519,826	$ 2,005,105	$ (7,365)	$ (1,217,307)	$ 1,301,070
Balance at the beginning of period (in shares) at Jun. 30, 2021	81,099				31,846
Net income (loss)			(40,151)			(40,151)
Other comprehensive loss, net of tax				36		36
Reclassification adjustment for loss on interest rate swap				6,695		6,695
Stock-based compensation		14,287				14,287
Net activity from stock-based compensation awards	$ 6	8,194			$ (2,518)	5,682
Net activity from stock-based compensation awards (in shares)	606				69
Proceeds from stock issued under Colleague Stock Purchase Plan		(11)			$ 282	271
Proceeds from stock issued under Colleague Stock Purchase Plan (in shares)					(7)
Balance at the end of period at Dec. 31, 2021	$ 817	542,296	1,964,954	(634)	$ (1,219,543)	$ 1,287,890
Balance at the end of period (in shares) at Dec. 31, 2021	81,705				31,908	49,797
Balance at the beginning of period at Sep. 30, 2021	$ 817	537,402	1,947,101	(740)	$ (1,219,399)	$ 1,265,181
Balance at the beginning of period (in shares) at Sep. 30, 2021	81,656				31,903
Net income (loss)			17,853			17,853
Other comprehensive loss, net of tax				106		106
Reclassification adjustment for loss on interest rate swap						0
Stock-based compensation		4,381				4,381
Net activity from stock-based compensation awards		514			$ (290)	224
Net activity from stock-based compensation awards (in shares)	49				9
Proceeds from stock issued under Colleague Stock Purchase Plan		(1)			$ 146	145
Proceeds from stock issued under Colleague Stock Purchase Plan (in shares)					(4)
Balance at the end of period at Dec. 31, 2021	$ 817	542,296	1,964,954	(634)	$ (1,219,543)	$ 1,287,890
Balance at the end of period (in shares) at Dec. 31, 2021	81,705				31,908	49,797
Balance at the beginning of period at Jun. 30, 2022	$ 818	521,848	2,322,810	(960)	$ (1,339,449)	$ 1,505,067
Balance at the beginning of period (in shares) at Jun. 30, 2022	81,796				36,619	45,177
Net income (loss)			26,336			$ 26,336
Other comprehensive loss, net of tax				(1,267)		(1,267)
Reclassification adjustment for loss on interest rate swap						0
Stock-based compensation		8,113				8,113
Net activity from stock-based compensation awards	$ 4	1,418			$ (4,108)	(2,686)
Net activity from stock-based compensation awards (in shares)	360				103
Proceeds from stock issued under Colleague Stock Purchase Plan		(3)			$ 324	321
Proceeds from stock issued under Colleague Stock Purchase Plan (in shares)					(9)
Settlement of equity forward contract		30,000			$ (43,162)	(13,162)
Balance at the end of period at Dec. 31, 2022	$ 822	561,376	2,349,146	(2,227)	$ (1,386,395)	$ 1,522,722
Balance at the end of period (in shares) at Dec. 31, 2022	82,156				36,713	45,443
Balance at the beginning of period at Sep. 30, 2022	$ 821	529,229	2,325,002	(2,227)	$ (1,342,786)	$ 1,510,039
Balance at the beginning of period (in shares) at Sep. 30, 2022	82,099				36,703
Net income (loss)			24,144			24,144
Reclassification adjustment for loss on interest rate swap						0
Stock-based compensation		1,968				1,968
Net activity from stock-based compensation awards	$ 1	180			$ (622)	(441)
Net activity from stock-based compensation awards (in shares)	57				15
Proceeds from stock issued under Colleague Stock Purchase Plan		(1)			$ 175	174
Proceeds from stock issued under Colleague Stock Purchase Plan (in shares)					(5)
Settlement of equity forward contract		30,000			$ (43,162)	(13,162)
Balance at the end of period at Dec. 31, 2022	$ 822	$ 561,376	$ 2,349,146	$ (2,227)	$ (1,386,395)	$ 1,522,722
Balance at the end of period (in shares) at Dec. 31, 2022	82,156				36,713	45,443