XML 16 R25.htm IDEA: XBRL DOCUMENT v3.3.0.814
Other Long-Term Obligations and Commitments (Tables)
9 Months Ended
Sep. 30, 2015
Text Block [Abstract]  
Summary of Future Minimum Lease Payments for Non-Cancelable Operating Leases

The Company has several non-cancelable operating leases, primarily for rental of office space, that have a term of more than one year. The future minimum lease payments for the rest of fiscal 2015 and thereafter for the operating leases are as follows:

 

(Thousands of dollars)    Operating
Leases
 

2015

   $ 194   

2016

     793   

2017

     125   

2018

     16   
  

 

 

 

Total minimum payments

   $ 1,128   
  

 

 

Reconciliation of Liability for Plugging and Abandonment Costs

A reconciliation of the liability for plugging and abandonment costs for the nine months ended September 30, 2015 is as follows:

 

(Thousands of dollars)       

Asset retirement obligation – December 31, 2014

   $ 12,501   

Liabilities incurred

     80   

Liabilities settled

     (1,108

Accretion expense

     399   
  

 

 

 

Asset retirement obligation – September 30, 2015

   $ 11,872