Equity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Beginning Balance			$ 1,812,293	$ 1,668,221
Net income	24,167	43,309	62,725	90,355
Other comprehensive income (loss)			37,798	41,505
Dividend reinvestment			152	138
Capital stock issued under employee benefit and stock plans			22,982	19,016
Purchase of capital stock			(4,400)	(46,616)
Cash dividends paid			(28,246)	(27,697)
Ending Balance	1,903,304	1,744,443	1,903,304	1,744,443
Noncontrolling interest acquired				(479)
Capital stock [Member]
Beginning Balance			97,303	100,106
Dividend reinvestment			3	4
Capital stock issued under employee benefit and stock plans			1,056	415
Purchase of capital stock			(128)	(1,587)
Ending Balance	98,234	98,938	98,234	98,938
Additional paid-in capital [Member]
Beginning Balance			374,300	447,433
Dividend reinvestment			149	134
Capital stock issued under employee benefit and stock plans			21,926	18,601
Purchase of capital stock			(4,272)	(45,029)
Ending Balance	392,103	421,139	392,103	421,139
Retained earnings [Member]
Beginning Balance			1,399,227	1,246,973
Net income			62,046	88,532
Cash dividends paid			(28,180)	(25,748)
Ending Balance	1,433,093	1,309,757	1,433,093	1,309,757
Accumulated other comprehensive income (loss) [Member]
Beginning Balance			(89,004)	(150,662)
Other comprehensive income (loss)			37,571	40,819
Ending Balance	(51,433)	(109,843)	(51,433)	(109,843)
Non-controlling interest [Member]
Beginning Balance			30,467	24,371
Net income			679	1,823
Other comprehensive income (loss)	413		227	686
Cash dividends paid			(66)	(1,949)
Ending Balance	31,307	24,452	31,307	24,452
Noncontrolling interest acquired				$ (479)