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Earnings Per Unit (Tables)
 12 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Earnings per Common and Subordinated Unit
The following table sets forth the computation of basic and diluted earnings per unit:
 
 
For the Year Ended December 31,
 
 
2017
 
2016
 
2015
 
 
(in thousands, except per unit  amounts)
NET INCOME (LOSS)
 
$
157,153

 
$
20,188

 
$
(101,305
)
Net loss attributable to Predecessor
 
—

 
—

 
(450
)
Net income attributable to noncontrolling interests subsequent to initial public offering
 
34

 
12

 
1,260

Distributions on Series A redeemable preferred units subsequent to initial public offering
 
(3,117
)
 
(5,763
)
 
(7,522
)
Distributions on Series B cumulative convertible preferred units
 
$
(1,925
)
 
—

 
—

NET INCOME (LOSS) ATTRIBUTABLE TO THE GENERAL PARTNER AND COMMON AND SUBORDINATED UNITS SUBSEQUENT TO INITIAL PUBLIC OFFERING
 
$
152,145

 
$
14,437

 
$
(108,017
)
ALLOCATION OF NET INCOME (LOSS) SUBSEQUENT TO INITIAL PUBLIC OFFERING ATTRIBUTABLE TO:
 
 

 
 

 
 

General partner interest
 
$
—

 
$
—

 
$
—

Common units
 
98,389

 
24,669

 
(54,326
)
Subordinated units
 
53,756

 
(10,232
)
 
(53,691
)
 
 
$
152,145

 
$
14,437

 
$
(108,017
)
NET INCOME (LOSS) ATTRIBUTABLE TO LIMITED PARTNERS PER COMMON AND SUBORDINATED UNIT:
 
 

 
 

 
 

Per common unit (basic)
 
$
1.01

 
$
0.26

 
$
(0.56
)
Weighted average common units outstanding (basic)
 
97,400

 
96,073

 
96,182

Per subordinated unit (basic)
 
$
0.56

 
$
(0.11
)
 
$
(0.56
)
Weighted average subordinated units outstanding (basic)
 
95,149

 
95,138

 
95,057

Per common unit (diluted)
 
$
1.01

 
$
0.26

 
$
(0.56
)
Weighted average common units outstanding (diluted)
 
97,400

 
96,243

 
96,182

Per subordinated unit (diluted)
 
$
0.56

 
$
(0.11
)
 
$
(0.56
)
Weighted average subordinated units outstanding (diluted)
 
95,149

 
95,138

 
95,057