Other Assets (Schedule Of Other Long-Term Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Loss Contingencies [Line Items]
Total other assets	$ 72	$ 33,222
SM Energy Litigation [Member]
Loss Contingencies [Line Items]
Debt issuance costs		27,105
Deposits related to SM Energy litigation		6,000
Other	72	117
Total other assets	$ 72	$ 33,222