Equity Reclassifications out of accumulated other comprehensive (loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Other Comprehensive Income (Loss), before Tax [Abstract]
Amortization of prior service cost and initial net obligation	$ (7,366)	$ (9,333)
Recognized actuarial loss	(171,337)	(153,770)
Total before tax	(178,703)	(163,103)
Other Comprehensive Income (Loss), Tax [Abstract]
Tax benefit, retirement benefit plans	64,694	59,607
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net of tax, retirement benefit plans	$ (114,009)	$ (103,496)