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Supplemental Quarterly Information (Unaudited)
 12 Months Ended
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.