Equity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2011
Beginning Balance		$ 1,812,293	$ 1,668,221
Net income	38,558	47,047
Other comprehensive income (loss)	26,267	25,890
Dividend reinvestment	79	70
Capital stock issued under employee benefit and stock plans	14,391	10,741
Purchase of capital stock	(4,327)	(26,034)
Cash dividends paid	(14,067)	(12,924)
Ending Balance	1,873,194	1,712,532	1,668,221
Noncontrolling interest acquired		(479)
Capital stock [Member]
Beginning Balance		97,303	100,106
Dividend reinvestment	2	2
Capital stock issued under employee benefit and stock plans	827	297
Purchase of capital stock	(127)	(885)
Ending Balance	98,005	99,520	100,106
Additional paid-in capital [Member]
Beginning Balance		374,300	447,433
Dividend reinvestment	77	68
Capital stock issued under employee benefit and stock plans	13,564	10,444
Purchase of capital stock	(4,200)	(25,149)
Ending Balance	383,741	432,796	447,433
Retained earnings [Member]
Beginning Balance		1,399,227	1,246,973
Net income	37,837	46,390
Cash dividends paid	(14,067)	(12,924)
Ending Balance	1,422,997	1,280,439	1,246,973
Accumulated other comprehensive income (loss) [Member]
Beginning Balance		(89,004)	(150,662)
Other comprehensive income (loss)	26,453	25,260
Ending Balance	(62,551)	(125,402)	(150,662)
Non-controlling interest [Member]
Beginning Balance		30,467	24,371
Net income	721	657
Other comprehensive income (loss)	(186)	630
Cash dividends paid	0	0
Ending Balance	31,002	25,179	24,371
Noncontrolling interest acquired		$ (479)