Employee Benefit Plans - Amortization Schedule (Details) (Postretirement Benefits Other Than Pension, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Postretirement Benefits Other Than Pension
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Net Prior Service Cost (Credit) [Roll Forward]
Net Prior Service Cost (Credit), beginning of period	$ (1,884)
Annual Amortization	230	230
Years Remaining	8 years 2 months 12 days
Curtailment	0
Net Prior Service Cost (Credit), end of period	(1,654)	(1,884)
Amortization of Net (Gain) Loss Calculation
Net (gain) loss		(12,086)
Asset (gains)/losses not yet recognized in market related value of assets	0
Net (gain) loss subject to amortization	(2,338)	(12,086)
Corridor (10% of greater of APBO or assets)		2,473
Net (gain)/loss in excess of corridor		(9,613)
Amortization years	12 years 1 month 10 days
Amortization of net (gain) loss for the period	$ (794)	$ (802)