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Discontinued Operations (Details) (USD $)
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3 Months Ended |
12 Months Ended |
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Dec. 31, 2014
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Sep. 30, 2014
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Jun. 30, 2014
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Mar. 31, 2014
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Dec. 31, 2013
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Sep. 30, 2013
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
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| Disposal Group, Including Discontinued Operation, Revenue |
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$ 474,000 |
$ 2,084,000 |
$ 2,318,000 |
| Disposal Group, Including Discontinued Operation, Operating Expense |
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(658,000) |
(2,361,000) |
(2,336,000) |
| Disposal Group, Including Discontinued Operation, Impairment |
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(673,000) |
(2,400,000) |
0 |
| Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax |
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|
(87,000) |
(75,000) |
0 |
| Discontinued Operation, Tax Effect of Discontinued Operation |
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333,000 |
339,000 |
0 |
| Current liabilities held for sale |
12,000 |
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114,000 |
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12,000 |
114,000 |
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| Loss on impairment of noncurrent assets held for sale |
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700,000 |
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673,000 |
2,400,000 |
0 |
| Discount rate |
9.50% |
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10.00% |
10.00% |
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| Current assets held for sale |
52,000 |
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|
|
272,000 |
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|
|
52,000 |
272,000 |
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| Gain (loss) from operations of disposal groups, net of tax |
(29,000) |
(26,000) |
(506,000) |
(50,000) |
(523,000) |
(15,000) |
(1,869,000) |
(6,000) |
(611,000) |
(2,413,000) |
(18,000) |
| Limited partners' net income (loss) from discontinued operations per unit (basic and diluted) |
$ 0.00 |
$ 0.00 |
$ (0.04) |
$ (0.01) |
$ 0.00 |
$ 0.01 |
$ (0.20) |
$ 0.01 |
$ (0.04) |
$ (0.27) |
$ 0.00 |
| Blackwater [Member] |
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| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
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| Noncurrent assets held for sale, net |
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1,200,000 |
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1,200,000 |
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| Current liabilities held for sale |
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100,000 |
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100,000 |
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| Current assets held for sale |
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100,000 |
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100,000 |
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| Gathering And Processing [Member] |
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| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
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| Loss on impairment of noncurrent assets held for sale |
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600,000 |
1,800,000 |
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| Discontinued Operations [Member] |
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| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
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| Loss on impairment of noncurrent assets held for sale |
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$ 400,000 |
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