Equity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Beginning Balance			$ 1,375,435	$ 1,961,608
Net (loss) income	$ 16,695	$ (45,551)	(157,820)	(393,129)
Other comprehensive income (loss)	15,775	(72,198)	(6,196)	(143,824)
Dividend reinvestment			231	244
Capital stock issued under employee benefit and stock plans			11,243	19,950
Purchase of capital stock			(231)	(244)
Cash dividends paid			(47,851)	(42,746)
Ending Balance	1,174,811	1,401,859	1,174,811	1,401,859
Capital stock [Member]
Beginning Balance			99,219	98,340
Dividend reinvestment			12	7
Capital stock issued under employee benefit and stock plans			380	740
Purchase of capital stock			(12)	(7)
Ending Balance	99,599	99,080	99,599	99,080
Additional paid-in capital [Member]
Beginning Balance			419,829	395,890
Dividend reinvestment			219	237
Capital stock issued under employee benefit and stock plans			10,863	19,210
Purchase of capital stock			(219)	(237)
Ending Balance	430,692	415,100	430,692	415,100
Retained earnings [Member]
Beginning Balance			1,070,282	1,501,157
Net (loss) income			(159,454)	(395,043)
Cash dividends paid			(47,780)	(42,699)
Ending Balance	863,048	1,063,415	863,048	1,063,415
Accumulated other comprehensive (loss) income [Member]
Beginning Balance			(243,523)	(66,131)
Other comprehensive income (loss)			(5,656)	(140,287)
Ending Balance	(249,179)	(206,418)	(249,179)	(206,418)
Non-controlling interest [Member]
Beginning Balance			29,628	32,352
Net (loss) income			1,634	1,914
Other comprehensive income (loss)			(540)	(3,537)
Cash dividends paid			(71)	(47)
Ending Balance	$ 30,651	$ 30,682	$ 30,651	$ 30,682