Equity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Beginning Balance	$ 1,961,608	$ 1,812,293
Net income	40,127	38,558
Other comprehensive income (loss)	(45,247)	26,267
Dividend reinvestment	79	79
Capital stock issued under employee benefit and stock plans	11,978	14,391
Purchase of capital stock	(79)	(4,327)
Cash dividends paid	(14,212)	(14,067)
Ending Balance	1,954,254	1,873,194
Noncontrolling interest acquired		0
Capital stock [Member]
Beginning Balance	98,340	97,303
Dividend reinvestment	2	2
Capital stock issued under employee benefit and stock plans	512	827
Purchase of capital stock	(2)	(127)
Ending Balance	98,852	98,005
Additional paid-in capital [Member]
Beginning Balance	395,890	374,300
Dividend reinvestment	77	77
Capital stock issued under employee benefit and stock plans	11,466	13,564
Purchase of capital stock	(77)	(4,200)
Ending Balance	407,356	383,741
Retained earnings [Member]
Beginning Balance	1,501,157	1,399,227
Net income	39,488	37,837
Cash dividends paid	(14,212)	(14,067)
Ending Balance	1,526,433	1,422,997
Accumulated other comprehensive income (loss) [Member]
Beginning Balance	(66,131)	(89,004)
Other comprehensive income (loss)	(43,755)	26,453
Ending Balance	(109,886)	(62,551)
Non-controlling interest [Member]
Beginning Balance	32,352	30,467
Net income	639	721
Other comprehensive income (loss)	(1,492)	(186)
Cash dividends paid	0	0
Ending Balance	31,499	31,002
Noncontrolling interest acquired		$ 0