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Depreciation, Amortization and Accretion
 6 Months Ended
Jun. 30, 2015
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, 2015 and 2014 were $3.4 million and $4.4 million, respectively; and for the six months ended June 30, 2015 and 2014 were $7.2 million and $8.4 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,
 
 
2015
 
2014
 
2015
 
2014
 
 
(Dollars in thousands)
Depreciation
 
$
2,162

 
$
2,665

 
$
4,369

 
$
5,291

Amortization
 
1,120

 
1,499

 
2,495

 
2,715

Accretion
 
166

 
188

 
331

 
375

Total depreciation, amortization and accretion
 
$
3,448

 
$
4,352

 
$
7,195

 
$
8,381