Benefit Plans - Components of Net Periodic Pension Income (Details) - Pension plans contribution [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Net periodic pension (income)
Service cost	$ 1,154	$ 1,349	$ 3,473	$ 4,148
Interest cost	9,375	9,575	28,299	29,256
Expected return on plan assets	(14,560)	(14,797)	(43,924)	(44,744)
Amortization of transition obligation	19	18	61	58
Amortization of prior service credit	(104)	(72)	(313)	(213)
Recognition of actuarial losses	1,805	871	5,452	2,809
Curtailment Gain	0	0	0	358
Special Termination Benefits Charge	0	0	214	459
Net periodic pension (income)	$ (2,311)	$ (3,056)	$ (6,738)	$ (7,869)