Long-Term Debt (Interest Expense And Capitalized Interest) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Long-Term Debt [Abstract]
Interest expense	$ 53,601	$ 72,824	$ 78,609
Interest income	(548)	(1,366)	(546)
Capitalized interest	(4,893)	(1,277)	(12,474)
Interest expense, net	$ 48,160	$ 70,181	$ 65,589