PROPERTY, PLANT, AND EQUIPMENT, NET (Tables)
 12 Months Ended
Dec. 31, 2013
Property, Plant and Equipment [Abstract]  
Schedule of property, plant, and equipment, net
Details on property, plant, and equipment, net were as follows:
 
Useful lives (In years)
 
December 31,
 
 
2013
 
2012
 
(Dollars in thousands)
Gas gathering systems
30
 
$
634,177

 
$
427,449

Compressor stations and compression equipment
30
 
351,560

 
237,618

Construction in progress
n/a
 
51,023

 
45,919

Other
4-15
 
7,451

 
4,524

Total
 
 
1,044,211

 
715,510

Accumulated depreciation
 
 
(63,870
)
 
(33,517
)
Property, plant, and equipment, net
 
 
$
980,341

 
$
681,993
Schedule of depreciation expense related to property, plant and equipment and capitalized interest
Depreciation expense related to property, plant, and equipment and capitalized interest were as follows:
 
Year ended December 31,
 
2013
 
2012
 
2011
 
(In thousands)
Depreciation expense
$
30,353

 
$
21,337

 
$
8,595

Capitalized interest
4,209

 
2,784

 
3,362