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Partners' Capital (Tables)
 12 Months Ended
Dec. 31, 2014
Partners' Capital [Abstract]  
Summary of Preferred Units Outstanding and Liquidation Preference
The following table summarizes the preferred Units outstanding at December 31, 2013:
 
Units
Outstanding
 
Liquidation
Preference
Series F Preferred Units
500

 
$
50,000

Series G Preferred Units
250

 
$
25,000
General Partnership and Limited Partnership Units Outstanding, Including Unvested General Partner Restricted Units
The following table is a roll-forward of the General Partnership and Limited Partnership Units outstanding, including unvested general partner restricted Units (see Note 13), for the three years ended December 31, 2014: 
 
General Partnership  and
Limited Partnership
Units Outstanding
Balance at December 31, 2011
92,044,769

Issuance of General Partner Units
11,085,905

Issuance of General Partner Restricted Units
565,137

Repurchase and Retirement of Restricted Units
(225,557
)
Balance at December 31, 2012
103,470,254

Issuance of General Partner Units
10,853,693

Issuance of General Partner Restricted Units
284,461

Repurchase and Retirement of Restricted Units
(30,245
)
Balance at December 31, 2013
114,578,163

Issuance of General Partner Units
219,695

Issuance of General Partner Restricted Units
319,055

Repurchase and Retirement of Restricted Units
(141,410
)
Balance at December 31, 2014
114,975,503
Summary of Distributions
The following table summarizes distributions accrued during the past three years: 
 
2014 Total
Distribution*
 
2013 Total
Distribution *
 
2012 Total
Distribution *
General Partner/Limited Partner Units
$
47,263

 
$
38,862

 
$
—

Series F Preferred Units
$
566

 
$
2,896

 
$
2,728

Series G Preferred Units
$
453

 
$
1,809

 
$
1,809

Series J Preferred Units
N/A

 
$
2,034

 
$
10,785

Series K Preferred Units
N/A

 
$
1,994

 
$
3,625

________________________
*
See the "Preferred Contributions" section for the redemptions and discussion of pro-rated dividends for all series of preferred stock occurring during the years ended December 31, 2014, 2013 and 2012.