Equity (Details) (USD $) In Thousands	3 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Beginning Balance	$ 1,658,641	$ 1,333,443
Net income	73,573	35,956
Other comprehensive loss	(78,178)	70,379
Dividend reinvestment	67	73
Capital stock issued under employee benefit and stock plans	11,141	7,802
Purchase of capital stock	(66,650)	(73)
Cash dividends paid	(9,849)	(9,964)
Ending Balance	1,588,745	1,437,616
Capital Stock [Member]
Beginning Balance	101,411	102,379
Dividend reinvestment	3	4
Capital stock issued under employee benefit and stock plans	326	97
Purchase of capital stock	(2,503)	(4)
Ending Balance	99,237	102,476
Additional Paid-in Capital [Member]
Beginning Balance	470,758	492,454
Dividend reinvestment	64	69
Capital stock issued under employee benefit and stock plans	10,815	7,705
Purchase of capital stock	(64,147)	(69)
Ending Balance	417,490	500,159
Retained Earnings [Member]
Beginning Balance	983,374	793,448
Net income	71,986	34,921
Cash dividends paid	(9,849)	(9,964)
Ending Balance	1,045,511	818,405
Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance	82,529	(72,781)
Other comprehensive loss	(76,477)	68,870
Ending Balance	6,052	(3,911)
Noncontrolling Interest [Member]
Beginning Balance	20,569	17,943
Net income	1,587	1,035
Other comprehensive loss	(1,701)	1,509
Ending Balance	$ 20,455	$ 20,487