Long-Term Debt (Interest Expense And Capitalized Interest) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Interest expense	$ 44,484	[1]	$ 53,601	[1]	$ 72,824	[1]
Interest income	(1,167)		(548)		(1,366)
Capitalized interest	(10,419)		(4,893)		(1,277)
Interest expense, net	32,898		48,160		70,181
Energy Resource Technology GOM, Inc [Member]
Interest expense	$ 2,800		$ 28,600		$ 25,800

[1] Interest expense of $2.8 million, $28.6 million and $25.8 million for 2013, 2012 and 2011, respectively, was allocated to ERT and is included in discontinued operations. Following the sale of ERT in February 2013, we ceased allocation of interest expense to ERT, which constitutes a discontinued operation.