CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss	Treasury Stock [Member]
Beginning Balance at Jun. 30, 2017	$ 1,669,039	$ 781	$ 415,912	$ 1,881,397	$ (59,119)	$ (569,932)
Cumulative effect adjustment upon the adoption	(236)		(596)	360
Net income (loss)	12,785			12,785
Foreign currency translation	23,329				23,329
Unrealized investment gains (losses), net of tax	70				70
Change in noncontrolling interest put option	(150)			(150)
Stock-based compensation	4,985		4,985
Net activity from stock-based compensation awards	(1,603)	4	2,057			(3,664)
Proceeds from stock issued under Colleague Stock Purchase Plan	195			(20)		215
Repurchase of common shares for treasury	(50,375)					(50,375)
Ending Balance at Sep. 30, 2017	1,658,039	785	422,358	1,894,372	(35,720)	(623,756)
Beginning Balance at Jun. 30, 2018	1,519,286	793	454,653	1,917,373	(142,168)	(711,365)
Cumulative effect adjustment upon the adoption	0			381	(381)
Net income (loss)	(9,530)			(9,530)
Foreign currency translation	(20,615)				(20,615)
Unrealized investment gains (losses), net of tax	(4)				(4)
Change in noncontrolling interest put option	241			241
Stock-based compensation	4,369		4,369
Net activity from stock-based compensation awards	5,304	5	10,487			(5,188)
Proceeds from stock issued under Colleague Stock Purchase Plan	159		36			123
Repurchase of common shares for treasury	(59,175)					(59,175)
Ending Balance at Sep. 30, 2018	$ 1,440,035	$ 798	$ 469,545	$ 1,908,465	$ (163,168)	$ (775,605)