DMC Pension Plan (Plan Asset Allocations) (Details)	12 Months Ended
	Jun. 30, 2013
Defined Benefit Plan Disclosure [Line Items]
Deviation from target plan asset allocations allowed	10.00%
Cash and cash equivalents [Member]
Weighted-average asset allocation by asset category [Abstract]
Target plan asset allocations	2.00%
Actual plan asset allocations	2.00%
United States government obligations [Member]
Weighted-average asset allocation by asset category [Abstract]
Target plan asset allocations	1.00%
Actual plan asset allocations	1.00%
Equity securities [Member]
Weighted-average asset allocation by asset category [Abstract]
Target plan asset allocations	55.00%
Actual plan asset allocations	55.00%
Debt securities [Member]
Weighted-average asset allocation by asset category [Abstract]
Target plan asset allocations	42.00%
Actual plan asset allocations	42.00%