XML 56 R20.htm IDEA: XBRL DOCUMENT v2.4.0.8
ASSET RETIREMENT OBLIGATIONS (Tables)
3 Months Ended
Mar. 31, 2014
ASSET RETIREMENT OBLIGATIONS  
Schedule of reconciliation of asset retirement obligations

 

 

 

 

Three Months Ended

 

Year Ended

 

 

 

March 31, 2014

 

December 31, 2013

 

 

 

(in thousands)

 

Asset retirement obligation liability, beginning balance

 

$

7,247

 

$

6,359

 

Settlements

 

 

(60

)

Accretion of liability

 

101

 

461

 

Adjustment reflecting updated estimates

 

 

487

 

Asset retirement obligation liability, ending balance

 

$

7,348

 

$

7,247