Balance, December 31, 2012

$

  384,053

Liabilities settled

(59,188

)

Accretion of discount

  16,236

Disposition of properties

(19,564

)

Liabilities incurred

  372

Revisions of estimated liabilities due to Hurricane Ike (1)

  5,526

Revisions of estimated liabilities – all other (1)

  34,672

Balance, September 30, 2013

  362,107

Less current portion

  95,014

Long-term

$

  267,093

(1) Revisions are primarily due to increases in the scope of work at several offshore locations required by the Bureau of Safety and Environmental Enforcement (“BSEE”).