Equity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Beginning Balance			$ 1,375,435	$ 1,961,608
Net loss	$ (168,811)	$ (387,705)	(174,514)	(347,578)
Other comprehensive loss	(4,099)	(26,379)	(21,971)	(71,626)
Dividend reinvestment			167	168
Capital stock issued under employee benefit and stock plans			7,243	16,681
Purchase of capital stock			(167)	(168)
Cash dividends paid			(31,916)	(28,498)
Ending Balance	1,154,277	1,530,587	1,154,277	1,530,587
Capital stock [Member]
Beginning Balance			99,219	98,340
Dividend reinvestment			8	5
Capital stock issued under employee benefit and stock plans			369	592
Purchase of capital stock			(8)	(5)
Ending Balance	99,588	98,932	99,588	98,932
Additional paid-in capital [Member]
Beginning Balance			419,829	395,890
Dividend reinvestment			159	163
Capital stock issued under employee benefit and stock plans			6,874	16,089
Purchase of capital stock			(159)	(163)
Ending Balance	426,703	411,979	426,703	411,979
Retained earnings [Member]
Beginning Balance			1,070,282	1,501,157
Net loss			(175,453)	(348,814)
Cash dividends paid			(31,845)	(28,451)
Ending Balance	862,984	1,123,892	862,984	1,123,892
Accumulated other comprehensive (loss) income [Member]
Beginning Balance			(243,523)	(66,131)
Other comprehensive loss			(20,904)	(69,352)
Ending Balance	(264,427)	(135,483)	(264,427)	(135,483)
Non-controlling interest [Member]
Beginning Balance			29,628	32,352
Net loss			939	1,236
Other comprehensive loss			(1,067)	(2,274)
Cash dividends paid			(71)	(47)
Ending Balance	$ 29,429	$ 31,267	$ 29,429	$ 31,267