Long-Term Debt (Summary Of Long-Term Debt) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Jan. 30, 2014	Jan. 21, 2011
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.375%
Unamortized premium on long-term debt	$ 6,232	$ 6,432
Total long-term debt	356,232	356,432
Debt instrument, stated interest rate	7.375%
Debt instrument, maturity	Mar. 01, 2021
7 3/8% Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.375%	7.375%	7.375%	7.375%
Total long-term debt	$ 350,000	$ 350,000
Debt instrument, stated interest rate	7.375%	7.375%	7.375%	7.375%
Debt instrument, maturity	Mar. 01, 2021