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Segment Information
 6 Months Ended
Jun. 30, 2013
Segment Reporting [Abstract]  
Segment Information
Segment Information
 
Identification of operating segments is based principally upon regions served.  The Partnership’s reportable segments consist of the natural gas gathering, processing and transmission operations located in north Texas and in the Permian Basin in west Texas ("NTX"), the pipelines and processing plants located in Louisiana ("LIG"), the south Louisiana processing and NGL assets ("PNGL") and rail, truck, pipeline, and barge facilities in the ORV, which includes the Company's investment in E2. Operating activity for intersegment eliminations is shown in the corporate segment.  Sales are derived from external domestic customers.
 
The Partnership evaluates the performance of its operating segments based on operating revenues and segment profits. Corporate expenses include general partnership expenses associated with managing all reportable operating segments. Corporate assets consist primarily of property and equipment, including software, for general corporate support, working capital, debt financing costs and its investment in Howard Energy Partners ("HEP").
 
Summarized financial information concerning reportable segments is shown in the following table.
 
LIG
 
NTX
 
PNGL
 
ORV
 
Corporate
 
Totals
 
(In thousands)
Three Months Ended June 30, 2013
 

 
 

 
 

 
 

 
 

 
 

Sales to external customers
$
119,725


$
85,360


$
185,562


$
64,090


$
—

 
$
454,737

Sales to affiliates
16,119


17,108


92


—


(33,319
)
 
—

Purchased gas, NGLs and crude oil
(115,395
)

(59,677
)

(166,906
)

(50,434
)

33,319

 
(359,093
)
Operating expenses
(7,813
)

(12,474
)

(8,003
)

(8,572
)

—


(36,862
)
Segment profit
$
12,636

 
$
30,317

 
$
10,745

 
$
5,084

 
$
—

 
$
58,782

Gain (loss) on derivatives
$
582

 
$
(271
)
 
$
314

 
$
(180
)
 
$
—

 
$
445

Depreciation, amortization and
   impairments
$
(3,170
)
 
$
(19,850
)
 
$
(8,215
)
 
$
(2,768
)
 
$
(670
)
 
$
(34,673
)
Capital expenditures
$
7,935

 
$
2,229

 
$
131,499

 
$
22,852

 
$
988

 
$
165,503

Identifiable assets
$
281,852

 
$
1,024,118

 
$
842,767

 
$
348,439

 
$
179,061

 
$
2,676,237

Three Months Ended June 30, 2012
 

 
 

 
 

 
 

 
 

 
 

Sales to external customers
$
121,479

 
$
61,236

 
$
211,687

 
$
—

 
$
—

 
$
394,402

Sales to affiliates
60,415

 
17,227

 
40,243

 
—


(117,885
)
 
—

Purchased gas, NGLs and crude oil
(153,601
)
 
(31,457
)
 
(236,925
)
 
—


117,885

 
(304,098
)
Operating expenses
(8,759
)
 
(14,144
)
 
(7,668
)
 
—


—

 
(30,571
)
Segment profit
$
19,534

 
$
32,862

 
$
7,337

 
$
—

 
$
—

 
$
59,733

Gain (loss) on derivatives
$
4,541

 
$
(153
)
 
$
517

 
$
—

 
$
—

 
$
4,905

Depreciation, amortization and
   impairments
$
(3,200
)
 
$
(21,009
)
 
$
(8,069
)
 
$
—

 
$
(611
)
 
$
(32,889
)
Capital expenditures
$
1,886

 
$
20,295

 
$
30,255

 
$
—

 
$
1,076

 
$
53,512

Identifiable assets
$
280,090

 
$
1,086,299

 
$
498,888

 
$
—

 
$
383,160

 
$
2,248,437

Six Months Ended June 30, 2013
 
 
 
 
 
 
 
 
 
 
 
Sales to external customers
$
252,782

 
$
158,809

 
$
369,485

 
$
119,351

 
$
—

 
$
900,427

Sales to affiliates
45,906

 
33,470

 
16,519

 
—

 
(95,895
)
 
—

Purchased gas, NGLs and crude oil
(256,028
)
 
(105,795
)
 
(342,689
)
 
(91,498
)
 
95,895

 
(700,115
)
Operating expenses
(15,474
)
 
(26,646
)
 
(15,220
)
 
(16,860
)
 
—

 
(74,200
)
Segment profit
$
27,186

 
$
59,838

 
$
28,095

 
$
10,993

 
$
—

 
$
126,112

Gain (loss) on derivatives
$
955

 
$
(1,046
)
 
$
244

 
$
(180
)
 
$
—

 
$
(27
)
Depreciation, amortization and
   impairments
$
(6,308
)
 
$
(39,641
)
 
$
(16,190
)
 
$
(5,110
)
 
$
(1,168
)
 
$
(68,417
)
Capital expenditures
$
16,167

 
$
7,252

 
$
227,665

 
$
38,097

 
$
5,942

 
$
295,123

Identifiable assets
$
281,852

 
$
1,024,118

 
$
842,767

 
$
348,439

 
$
179,061

 
$
2,676,237

Six Months Ended June 30, 2012
 

 
 

 
 

 
 
 
 

 
 
Sales to external customers
$
268,177

 
$
125,917

 
$
426,267

 
$
—

 
$
—

 
$
820,361

Sales to affiliates
133,225

 
48,711

 
85,787

 
—

 
(267,723
)
 
—

Purchased gas, NGLs and crude oil
(342,822
)
 
(81,478
)
 
(473,727
)
 
—

 
267,723

 
(630,304
)
Operating expenses
(16,696
)
 
(27,295
)
 
(14,387
)
 
—

 
—

 
(58,378
)
Segment profit
$
41,884

 
$
65,855

 
$
23,940

 
$
—

 
$
—

 
$
131,679

Gain (loss) on derivatives
$
4,643

 
$
(2,416
)
 
$
509

 
$
—

 
$
—

 
$
2,736

Depreciation, amortization and
   impairments
$
(6,372
)
 
$
(41,442
)
 
$
(16,028
)
 
$
—

 
$
(1,243
)
 
$
(65,085
)
Capital expenditures
$
1,888

 
$
33,451

 
$
45,917

 
$
—

 
$
1,536

 
$
82,792

Identifiable assets
$
280,090


$
1,086,299


$
498,888


$
—


$
383,160

 
$
2,248,437



The following table reconciles the segment profits reported above to the operating income as reported in the condensed consolidated statements of operations (in thousands):
 

Three Months Ended June 30,
 
Six Months Ended June 30,
 
2013

2012
 
2013
 
2012
Segment profits
$
58,782


$
59,733

 
$
126,112


$
131,679

General and administrative expenses
(18,592
)

(13,774
)
 
(37,565
)

(29,380
)
Gain (loss) on derivatives
445


4,905

 
(27
)

2,736

Gain (loss) on sale of property
(84
)

406

 
(95
)

504

Depreciation, amortization and impairments
(34,673
)

(32,889
)
 
(68,417
)

(65,085
)
Operating income
$
5,878


$
18,381

 
$
20,008


$
40,454