Long-Term Debt (Summary Of Long-Term Debt) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended		0 Months Ended
	Mar. 31, 2014	Jun. 30, 2013	Jan. 21, 2011 7 3/8% Senior Notes [Member]	Mar. 31, 2014 7 3/8% Senior Notes [Member]	Jun. 30, 2013 7 3/8% Senior Notes [Member]
Debt Instrument [Line Items]
Unamortized premium on long-term debt	$ 6,623
Total long-term debt	$ 356,623	$ 250,000		$ 350,000	$ 250,000
Debt instrument, stated interest rate	7.375%		7.375%	7.375%	7.375%
Debt instrument, maturity	Mar. 01, 2021		Mar. 01, 2021