CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY AND COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Common Stock Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning Balance at Jun. 30, 2009	$ 926,942	$ 729	$ 197,096	$ 791,677	$ 7,157	$ (69,717)
Comprehensive Income:
Net income	279,909			279,909
Foreign currency translation	2,623				2,623
Unrealized Investment Gains (losses), net of tax	116				116
Comprehensive income	282,648
Non-controlling Interest Fanor	(1,745)			(1,745)
Stock-based compensation	10,148		10,148
Cash dividends of $0.30, $0.24 and $0.20 per common share in 2012, 2011 and 2010 respectively	(14,250)			(14,250)
Proceeds from exercise of stock options	13,041	5	13,489			(453)
Tax benefit from exercise of stock options	3,283		3,283
Proceeds from stock issued under Employee Stock Purchase Plan	997		193			804
Repurchase of common shares for treasury	(41,683)					(41,683)
Ending Balance at Jun. 30, 2010	1,179,381	734	224,209	1,055,591	9,896	(111,049)
Comprehensive Income:
Net income	330,403			330,403
Foreign currency translation	5,646				5,646
Unrealized Investment Gains (losses), net of tax	187				187
Comprehensive income	336,236
Non-controlling Interest Fanor	(1,321)
Accretion of Noncontrolling Interest	(1,321)			(1,321)
Stock-based compensation	14,251		14,251
Cash dividends of $0.30, $0.24 and $0.20 per common share in 2012, 2011 and 2010 respectively	(16,701)			(16,701)
Proceeds from exercise of stock options	8,350	4	9,094			(748)
Tax benefit from exercise of stock options	800		800
Proceeds from stock issued under Employee Stock Purchase Plan	1,460		64			1,396
Repurchase of common shares for treasury	(132,940)					(132,940)
Ending Balance at Jun. 30, 2011	1,389,516	738	248,418	1,367,972	15,729	(243,341)
Comprehensive Income:
Net income	141,565			141,565
Foreign currency translation	(21,608)				(21,608)
Unrealized Investment Gains (losses), net of tax	(10)				(10)
Comprehensive income	119,947
Non-controlling Interest Fanor	(671)
Accretion of Noncontrolling Interest	(671)			(671)
Stock-based compensation	18,530		18,530
Cash dividends of $0.30, $0.24 and $0.20 per common share in 2012, 2011 and 2010 respectively	(19,878)			(19,878)
Proceeds from exercise of stock options	4,954	3	6,130			(1,179)
Tax benefit from exercise of stock options	372		372
Proceeds from stock issued under Employee Stock Purchase Plan	1,716		(488)			2,204
Repurchase of common shares for treasury	(158,093)					(158,093)
Ending Balance at Jun. 30, 2012	$ 1,356,393	$ 741	$ 272,962	$ 1,488,988	$ (5,889)	$ (400,409)