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Segment Information (Tables)
 12 Months Ended
Dec. 31, 2013
Segment Information  
Schedule of operating results and assets of reportable segments

The operating results and assets of the Company's reportable segments were as follows for 2013 (in thousands):

 
   Exploration and
production		   Gathering and
compression		   Fresh water
distribution		   Elimination of
intersegment
transactions		   Consolidated
total		  

2013:

                                

Sales and revenues:

                                

Third-party

   $ 1,313,134     —     —     —     1,313,134  

Intersegment

     —     22,363     35,871     (58,234 )   —  
                       
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

 

   $ 1,313,134     22,363     35,871     (58,234 )   1,313,134  
                       
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
                       

Depiction, depreciation, and amortization

   $ 220,857     11,346     2,773     (1,100 )   233,876  

Interest expense

   $ 136,453     155     9     —     136,617  

Income tax expense

   $ 186,210     —     —     —     186,210  

Operating income(1)

   $ 335,901     8,938     27,296     (30,928 )   341,207  

Segment assets

   $ 6,580,282     561,855     230,247     (758,803 )   6,613,581  

Capital expenditures for
segment assets

   $ 2,110,358     389,453     203,790     (32,028 )   2,671,573  
(1)
All general and administrative expenses are included in the exploration and production segment.