Retirement Benefits - Additional Information (Details1) (Other Postretirement Benefit Plans, Defined Benefit, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Other Postretirement Benefit Plans, Defined Benefit
Postretirement Plan Disclosure [Line Items]
Postretirement Plan, Service Cost	$ 206	$ 182
Postretirement Plan, Interest Cost	709	870
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(26)	(11)
Defined Benefit Plan, Amortization of Net Actuarial Loss	350	128
Postretirement Plan, Net postretirement benefit cost	$ 1,239	$ 1,169