Benefit Plans - Components of Net Periodic Pension Income (Details) - Pension plans contribution [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Net periodic pension (income)
Service cost	$ 1,156	$ 1,384	$ 2,319	$ 2,799
Interest cost	9,438	9,745	18,923	19,681
Expected return on plan assets	(14,657)	(14,900)	(29,364)	(29,947)
Amortization of transition obligation	21	19	42	40
Amortization of prior service credit	(104)	(71)	(209)	(141)
Recognition of actuarial losses	1,815	937	3,648	1,937
Curtailment Gain	0	358	0	358
Special Termination Benefits Charge	54	459	107	459
Net periodic pension (income)	$ (2,277)	$ (2,069)	$ (4,534)	$ (4,814)