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Supplemental Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2011
Supplemental Financial Data [Abstract] |
Selected Quarterly Financial Information |
2011 |  | First Quarter |  |  | Second Quarter |  |  | Third Quarter |  |  | Fourth Quarter |
|  |  |  |  | (as restated) |  |  | (as restated) |  |  |  |
Total revenues |  | $ | 84,852 |  |  | $ | 96,532 |  |  | $ | 103,164 |  |  | $ | 90,681 |
Depreciation, depletion and amortization |  | $ | 14,322 |  |  | $ | 17,435 |  |  | $ | 19,819 |  |  | $ | 13,542 |
Income (loss) from operations |  | $ | 55,861 |  |  | $ | 68,670 |  |  | $ | (17,796 | ) |  | $ | (5,054 | )
Net income (loss) |  | $ | 45,282 |  |  | $ | 56,206 |  |  | $ | (30,559 | ) |  | $ | (19,357 | )
Basic and diluted net income (loss) per limited partner unit |  | $ | 0.42 |  |  | $ | 0.52 |  |  | $ | (0.28 | ) |  | $ | (0.18 | )
Weighted average number of units outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common |  |  | 106,028 |  |  |  | 106,028 |  |  |  | 106,028 |  |  |  | 106,028 |
2010 |  | First Quarter |  |  | Second Quarter |  |  | Third Quarter |  |  | Fourth Quarter |
Total revenues |  | $ | 63,519 |  |  | $ | 79,588 |  |  | $ | 80,752 |  |  | $ | 77,543 |
Income from operations |  | $ | 40,912 |  |  | $ | 51,953 |  |  | $ | 50,344 |  |  | $ | 52,852 |
Net income |  | $ | 30,191 |  |  | $ | 41,611 |  |  | $ | 40,153 |  |  | $ | 42,506 |
Basic and diluted net income per limited partner unit |  | $ | 0.24 |  |  | $ | 0.38 |  |  | $ | 0.51 |  |  | $ | 0.39 |
Weighted average number of units outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common |  |  | 69,451 |  |  |  | 74,028 |  |  |  | 77,896 |  |  |  | 106,028 |

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 270 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (a)-(j) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6952194&loc=d3e1280-108306 + Details
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