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Depreciation, Amortization and Accretion
 6 Months Ended
Jun. 30, 2014
Depreciation, Amortization And Accretion [Abstract]  
Depreciation, Amortization and Accretion
Depreciation, Amortization and Accretion — The total depreciation, amortization and accretion expenses related primarily to property and equipment, amortizable intangible assets, and asset retirement obligations for the three months ended June 30, 2014 and 2013 were $4.4 million and $3.8 million, respectively; and for the six months ended June 30, 2014 and 2013 were $8.4 million and $7.6 million, respectively. The consolidated balances consisted of the following for the periods stated:
 

For the Three Months Ended June 30,
 
For the Six Months Ended June 30,
 

2014
 
2013
 
2014
 
2013
 

(Dollars in thousands)
Depreciation

$
2,665

 
$
2,405

 
$
5,291

 
$
4,827

Amortization

1,499

 
1,252

 
2,715

 
2,497

Accretion

188

 
165

 
375

 
305

Total depreciation, amortization and accretion

$
4,352

 
$
3,822

 
$
8,381

 
$
7,629