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Net Income Per Unit (Tables)
 3 Months Ended
Mar. 31, 2014
Net Income (Loss), Per Outstanding Limited Partnership and General Partnership Unit, Basic and Diluted, Net of Tax [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The calculation of net income per unit is as follows (in thousands, except unit and per unit amounts):
 
Three Months Ended March 31,
 
2014
 
2013
Net income attributable to partners
$
44,498

 
$
18,678

General partner’s distributions (including IDRs) (a)
(6,847
)
 
(1,666
)
Limited partners’ distributions on common units
(23,129
)
 
(14,835
)
Limited partner’s distributions on subordinated units
(9,000
)
 
(7,475
)
Distributions less (greater) than earnings
$
5,522

 
$
(5,298
)
 
 
 
 
General partner’s earnings:


 
 
Distributions (including IDRs) (a)
$
6,847

 
$
1,666

Allocation of distributions less (greater) than earnings
2,761

 
(107
)
Total general partner’s earnings
$
9,608

 
$
1,559

 
 
 
 
Limited partners’ earnings on common units:
 
 
 
Distributions
$
23,129

 
$
14,835

Allocation of distributions less (greater) than earnings
1,987

 
(3,396
)
Total limited partners’ earnings on common units
$
25,116

 
$
11,439

 
 
 
 
Limited partner’s earnings on subordinated units:
 
 
 
Distributions
$
9,000

 
$
7,475

Allocation of distributions less (greater) than earnings
774

 
(1,795
)
Total limited partner’s earnings on subordinated units
$
9,774

 
$
5,680

 
 
 
 
Weighted average limited partner units outstanding:
 
 
 
Common units - basic
39,186,006

 
28,861,234

Common unit equivalents
98,382

 
67,894

Common units - diluted
39,284,388

 
28,929,128

 
 
 
 
Subordinated units - basic and diluted
15,254,890

 
15,254,890

 
 
 
 
Net income per limited partner unit (b):
 
 
 
Common - basic and diluted
$
0.64

 
$
0.40

Subordinated - basic and diluted
$
0.64

 
$
0.37

____________ 
(a)
General partner’s distributions (including IDRs) consist of an approximate 2% general partner interest and IDRs, which entitle the general partner to receive increasing percentages, up to 50%, of quarterly distributions in excess of $0.388125 per unit per quarter. See Note K of our Annual Report on Form 10-K for the year ended December 31, 2013 for further discussion related to IDRs.
(b)
We base our calculation of net income per unit on the weighted-average number of common and subordinated limited partner units outstanding during the period. Therefore, as a result of the public offering of common units in January 2013, net income per common and subordinated limited partner units will not agree for the three months ended March 31, 2013.