Condensed Consolidated Statements of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Company Common Stock [Member]	Common Class B [Member]	Common Stock Outstanding [Member] Company Common Stock [Member]	Common Stock Outstanding [Member] Common Class B [Member]	Additional Paid-in Capital Outstanding [Member]	Retained Earnings [Member]	Retained Earnings [Member] Company Common Stock [Member]	Retained Earnings [Member] Common Class B [Member]	Accumulated Other Comprehensive Loss [Member]
Balance at Jun. 30, 2012	$ 797,445			$ 35,791	$ 8,716	$ 53,275	$ 722,778			$ (23,115)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	89,847						89,847
Other comprehensive income, net	1,217									1,217
Share-based incentive plan transactions	26,357			1,109		25,248
Purchases of Company stock	(39,908)			(1,125)	(7)	(38,776)	0
Share-based compensation	9,628					9,628
Conversion of Class B to common stock	0			369	(369)
Dividends paid		(42,367)	(9,938)					(42,367)	(9,938)
Tax benefit from incentive plans	(606)					(606)
Balance at Mar. 31, 2013	$ 831,675			$ 36,144	$ 8,340	$ 48,769	$ 760,320			$ (21,898)