Annual report pursuant to Section 13 and 15(d)

Hurricane Remediation And Insurance Claims (Schedule Of Reconciliation Of Approved Costs And Amounts For Payments To Hurricanes, Included In Operating Lease Expense) (Details)

v2.4.0.6
Hurricane Remediation And Insurance Claims (Schedule Of Reconciliation Of Approved Costs And Amounts For Payments To Hurricanes, Included In Operating Lease Expense) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Hurricane Remediation And Insurance Claims [Abstract]      
Incurred and reversals of accruals $ 132 $ (1,380) $ 37,062
Plus amounts returned to insurers 1,241    
Less amounts approved for payment by insurers (1,334) (10,350) (18,683)
Included in lease operating expense $ 39 $ (11,730) $ 18,379