Pension and Other Postretirement Benefits (Details Textual) (USD $)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Eligible Age for Availing Postretirement Healthcare Benefits	55
Years of Service	10
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Defined Contribution Plan, Cost Recognized	$ 20,386,000	$ 16,701,000	$ 19,367,000
Pension plans contribution [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation for all Defined Benefit Pension Plans	956,700,000	879,300,000
Net Periodic Pension Cost	(9,047,000)	4,862,000	7,104,000
Projected Benefit Payments for 2015	49,000,000
Projected Benefit Payments for 2016	48,800,000
Projected Benefit Payments for 2017	50,500,000
Projected Benefit Payments for 2018	52,700,000
Projected Benefit Payments for 2019	55,100,000
Projected Benefit Payments for 2020 through 2024	301,500,000
Accumulated Other Comprehensive Loss Expected to be Recognized in Net Periodic Pension Cost during 2015 related to Net Actuarial Losses	4,100,000
Accumulated Other Comprehensive Loss Expected to be Recognized in Net Periodic Pension Cost during 2015 related to Transition Obligations	100,000
Accumulated Other Comprehensive Income Expected to be Recognized in Net Periodic Pension Cost during 2015 related to Prior Service Credit	300,000
Estimated Future Employer Contributions in 2015	11,500,000
Other postretirement benefit plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net Periodic Pension Cost	1,267,000	1,316,000	959,000
Projected Benefit Payments for 2015	2,300,000
Projected Benefit Payments for 2016	2,200,000
Projected Benefit Payments for 2017	2,200,000
Projected Benefit Payments for 2018	2,100,000
Projected Benefit Payments for 2019	2,000,000
Projected Benefit Payments for 2020 through 2024	8,700,000
Accumulated Other Comprehensive Loss Expected to be Recognized in Net Periodic Pension Cost during 2015 related to Net Actuarial Losses	800,000
Accumulated Other Comprehensive Income Expected to be Recognized in Net Periodic Pension Cost during 2015 related to Prior Service Credit	100,000
Estimated Future Employer Contributions in 2015	$ 2,300,000