Long-Term Debt (Schedule Of Interest Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Long-Term Debt [Abstract]
Cash payments for interest			$ (50,758)	$ (47,510)
Commitment and other fees paid			1,351	1,228
Amortization of debt issuance costs and discount or premium on notes			2,134	1,939
Change in accrued interest			(3,376)	(5,184)
Capitalized Interest			(336)	(377)
Other			10	17
Total interest expense	$ 16,927	$ 15,078	$ 50,541	$ 45,133