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Investment In Unconsolidated Affiliates
 6 Months Ended
Jun. 30, 2013
Investment In Unconsolidated Subsidiaries [Abstract]  
Investment In Unconsolidated Affiliates
Investment in Unconsolidated Affiliates
As of June 30, 2013, the Partnership has a 49.99% general partner interest in HPC, a 50% membership interest in MEP, a 30% membership interest in Lone Star, a 33.33% membership interest in Ranch JV, and a 50% interest in Grey Ranch. The carrying value of the Partnership’s investment in each of the unconsolidated affiliates as of June 30, 2013 and December 31, 2012 is as follows:
 
June 30,
2013
 
December 31,
2012
HPC
$
637

 
$
650

MEP
564

 
581

Lone Star
987

 
948

Ranch JV
36

 
35

Grey Ranch
—

 
—

 
$
2,224

 
$
2,214


The following tables summarize the Partnership’s investment activities in each of the unconsolidated affiliates for the three and six months ended June 30, 2013 and 2012:
 
Three Months Ended June 30, 2013
 
HPC
 
MEP
 
Lone Star
 
Ranch JV
 
Grey Ranch
Contributions to unconsolidated affiliates
$
—

 
$
—

 
$
22

 
$
—

 
$
—

Distributions from unconsolidated affiliates
(14
)
 
(18
)
 
(23
)
 
—

 
—

Share of earnings of unconsolidated affiliates’ net income
9

 
10

 
13

 
—

 
—

Amortization of excess fair value of investment
(1
)
 
—

 
—

 
—

 
—

 
Three Months Ended June 30, 2012
 
HPC
 
MEP
 
Lone Star
 
Ranch JV
 
Grey Ranch
Contributions to unconsolidated affiliates
$
—

 
$
—

 
$
95

 
$
9

 
$
—

Distributions from unconsolidated affiliates
(14
)
 
(19
)
 
(11
)
 
—

 
—

Share of earnings of unconsolidated affiliates’ net income
13

 
10

 
12

 
—

 
—

Amortization of excess fair value of investment
(1
)
 
—

 
—

 
—

 
—

 
Six Months Ended June 30, 2013
 
HPC
 
MEP
 
Lone Star
 
Ranch JV
 
Grey Ranch
Contributions to unconsolidated affiliates
$
—

 
$
—

 
$
49

 
$
1

 
$
—

Distributions from unconsolidated affiliates
(30
)
 
(38
)
 
(40
)
 
—

 
—

Share of earnings of unconsolidated affiliates’ net income
19

 
20

 
30

 
—

 
—

Amortization of excess fair value of investment
(3
)
 
—

 
—

 
—

 
—

 
Six Months Ended June 30, 2012
 
HPC
 
MEP
 
Lone Star
 
Ranch JV
 
Grey Ranch
Contributions to unconsolidated affiliates
$
—

 
$
—

 
$
175

 
$
22

 
$
—

Distributions from unconsolidated affiliates
(30
)
 
(38
)
 
(18
)
 
—

 
—

Share of earnings of unconsolidated affiliates’ net income
24

 
21

 
24

 
—

 
—

Amortization of excess fair value of investment
(3
)
 
—

 
—

 
—

 
—


The following tables present selected income statement data for each of the unconsolidated affiliates, on a 100% basis, for the three and six months ended June 30, 2013 and 2012:
 
Three Months Ended June 30, 2013
 
HPC
 
MEP
 
Lone Star
 
Ranch JV
 
Grey Ranch
Total revenues
$
38

 
$
63

 
$
425

 
$
3

 
$
—

Operating income (loss)
19

 
33

 
45

 
1

 
(1
)
Net income (loss)
18

 
21

 
44

 
1

 
(1
)
 
Three Months Ended June 30, 2012
 
HPC
 
MEP
 
Lone Star
 
Ranch JV
 
Grey Ranch
Total revenues
$
46

 
$
65

 
$
158

 
$
—

 
$
—

Operating income
27

 
34

 
40

 
—

 
—

Net income
26

 
21

 
41

 
—

 
—


 
Six Months Ended June 30, 2013
 
HPC
 
MEP
 
Lone Star
 
Ranch JV
 
Grey Ranch
Total revenues
$
78

 
$
128

 
$
783

 
$
6

 
$
—

Operating income (loss)
39

 
67

 
101

 
1

 
(1
)
Net income (loss)
38

 
42

 
99

 
1

 
(1
)
 
Six Months Ended June 30, 2012
 
HPC
 
MEP
 
Lone Star
 
Ranch JV
 
Grey Ranch
Total revenues
$
88

 
$
131

 
$
325

 
$
—

 
$
—

Operating income
50

 
68

 
79

 
—

 
—

Net income
49

 
42

 
79

 
—

 
—