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Consolidated Statements of Partners' Equity - USD ($)
$ in Thousands
Total
Series A Preferred
Common
Subordinated
General Partner
Balance at Dec. 31, 2014 $ 297,698   $ 304,729 $ (7,131) $ 100
Balance at Dec. 31, 2014     20,505,000 14,985,000 35,526
-Net income 60,050 $ 3,019 $ 32,878 $ 24,028 $ 125
-Issuance of preferred units, net of issuance costs (Note 9), value 72,297 $ 72,297      
-Issuance of preferred units, net of issuance costs (Note 9), shares   3,000,000      
-Distributions declared and paid (common and preferred units) (Note 9) (62,207) $ (2,100) (34,653) (25,324) (130)
Balance at Dec. 31, 2015 367,838 $ 73,216 $ 302,954 $ (8,427) $ 95
Balance at Dec. 31, 2015   3,000,000 20,505,000 14,985,000 35,526
-Net income 66,854 $ 6,750 $ 34,652 $ 25,323 $ 129
-Distributions declared and paid (common and preferred units) (Note 9) (66,856) (6,750) (34,654) (25,325) (127)
Balance at Dec. 31, 2016 367,836 $ 73,216 $ 302,952 $ (8,429) $ 97
Balance at Dec. 31, 2016   3,000,000 20,505,000 14,985,000 35,526
-Net income 17,339 $ 6,750 $ 9,302 $ 1,208 $ 79
-Conversion of subordinated units to common units (Note 9), value     $ (15,171) $ 15,171  
-Conversion of subordinated units to common units (Note 9), shares     14,985,000 (14,985,000)  
-Distributions declared and paid (common and preferred units) (Note 9) (66,857) (6,750) $ (52,028) $ (7,950) (129)
Balance at Dec. 31, 2017 $ 318,318 $ 73,216 $ 245,055 $ 0 $ 47
Balance at Dec. 31, 2017   3,000,000 35,490,000 0 35,526