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Supplemental Quarterly Information (Unaudited) | 12 Months Ended
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Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract] |
Supplemental Quarterly Information (Unaudited) | Quarterly Financial Data The following table summarizes quarterly financial data for 2015 and 2014 (in thousands, except per unit data):
2015 | First Quarter |  |  | Second Quarter |  |  | Third Quarter |  |  | Fourth Quarter |  |  | Total 2015
Total revenues and other income | $ | 109,677 |  |  |  | $ | 137,630 |  |  |  | $ | 125,479 |  |  |  | $ | 116,063 |  |  |  | $ | 488,849 |
Depreciation, depletion and amortization | $ | 25,392 |  |  |  | $ | 30,660 |  |  |  | $ | 26,624 |  |  |  | $ | 18,152 |  |  |  | $ | 100,828 |
Asset impairment | $ | — |  |  |  | $ | 3,803 |  | (1) |  | $ | 626,838 |  | (2) |  | $ | 50,953 |  | (3) |  | $ | 681,594 |
Income (loss) from operations | $ | 40,417 |  |  |  | $ | 55,920 |  |  |  | $ | (576,290 | ) |  |  | $ | 2,042 |  |  |  | $ | (477,911 | )
Net income (loss) | $ | 17,489 |  |  |  | $ | 32,578 |  |  |  | $ | (600,001 | ) |  |  | $ | (21,786 | ) |  |  | $ | (571,720 | )
Net income (loss) per limited partner unit | $ | 1.40 |  |  |  | $ | 2.50 |  |  |  | $ | (47.90 | ) |  |  | $ | (1.75 | ) |  |  | $ | (45.75 | )
Weighted average number of common units outstanding | 12,230 |  |  |  | 12,230 |  |  |  | 12,230 |  |  |  | 12,230 |  |  |  | 12,230 |
2014 | First Quarter |  |  | Second Quarter |  |  | Third Quarter |  |  | Fourth Quarter |  |  | Total 2014
Total revenues and other income | $ | 80,309 |  |  |  | $ | 90,561 |  |  |  | $ | 91,609 |  |  |  | $ | 137,273 |  |  |  | $ | 399,752 |
Depreciation, depletion and amortization | $ | 14,647 |  |  |  | $ | 16,350 |  |  |  | $ | 18,621 |  |  |  | $ | 30,258 |  |  |  | $ | 79,876 |
Asset impairment | $ | — |  |  |  | $ | 5,624 |  | (4) |  | $ | — |  |  |  | $ | 20,585 |  | (5) |  | 26,209 |
Income from operations | $ | 52,439 |  |  |  | $ | 50,403 |  |  |  | $ | 55,027 |  |  |  | $ | 31,050 |  |  |  | $ | 188,919 |
Net income | $ | 32,605 |  |  |  | $ | 31,407 |  |  |  | $ | 36,173 |  |  |  | $ | 8,645 |  |  |  | $ | 108,830 |
Net income per limited partner unit | $ | 2.90 |  |  |  | $ | 2.80 |  |  |  | $ | 3.20 |  |  |  | $ | 0.70 |  |  |  | $ | 9.42 |
Weighted average number of common units outstanding | 10,985 |  |  |  | 11,040 |  |  |  | 11,124 |  |  |  | 12,145 |  |  |  | 11,326 |
(1) | During the second quarter of 2015 we recorded a $2.3 million impairment expense related to a coal preparation plant and a $1.5 million impairment expense related to coal mineral rights.
(2) | During the third quarter of 2015 we recorded $335.7 million of oil and gas property impairment, $247.8 million of coal property impairment and $43.4 million of aggregates property impairment.
(3) | During the fourth quarter of 2015 we recorded $31.9 million of oil and gas property impairment, $8.2 million of coal property impairment, $5.5 million of goodwill impairment, $4.7 million related to coal processing and transportation assets as well as obsolete equipment at our Logan office as well as a $0.7 million impairment expense related to obsolete plant and equipment at VantaCore.
(4) | During the second quarter of 2014, we recorded $5.6 million of intangible asset impairment related to an aggregates lease.
(5) | During the fourth quarter of 2014, we recorded $16.8 million of coal property impairment and $3.0 million of aggregates property impairment as well as $0.8 million in impairment expense related to a coal preparation plant. that began with current realized pricing as of the measurement date and included an adjustment for risk related to the future realization of cash flows.

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- Definition The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e765-108305 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=51825399&loc=d3e1280-108306 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e725-108305 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a + Details
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