Stock-Based Compensation (Restricted Stock Activity) (Details) (Restricted Stocks [ Member], USD $)	9 Months Ended
	Mar. 31, 2012
Restricted Stocks [ Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Unvested restricted stock at beginning of period	44,000
Number of Shares, Granted	32,000
Number of Shares, Vested	(14,000)
Number of Shares, Forfeited	0
Number of Shares, Unvested restricted stock at end of period	62,000
Weighted Average Grant Date Fair Value, Unvested restricted stock at beginning of period	$ 54.86
Weighted Average Grant Date Fair Value, Granted	$ 67.63
Weighted Average Grant Date Fair Value, Vested	$ 46.75
Weighted Average Grant Date Fair Value, Forfeited	$ 0.00
Weighted Average Grant Date Fair Value, Unvested restricted stock at end of period	$ 63.26