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Condensed Consolidated Statements of Changes in Partnership Capital (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
General Partner [Member]
Limited Partner [Member]
Total
Balance at Dec. 31, 2018 $ 1,826 $ 84,821 $ 86,647
Balance (in shares) at Dec. 31, 2018   32,280  
Net income 901 $ 26,674 27,575
Distributions (1,116) (33,401) (34,517)
Acquisition of assets for units 0 $ 43,824 43,824
Acquisition of assets for units (in shares)   2,400  
Balance at Jun. 30, 2019 1,611 $ 121,918 123,529
Balance (in shares) at Jun. 30, 2019   34,680  
Balance at Mar. 31, 2019 1,709 $ 125,503 127,212
Balance (in shares) at Mar. 31, 2019   34,680  
Net income 455 $ 13,141 13,596
Distributions (553) (16,726) (17,279)
Balance at Jun. 30, 2019 1,611 $ 121,918 123,529
Balance (in shares) at Jun. 30, 2019   34,680  
Balance at Dec. 31, 2019 1,228 $ 111,108 112,336
Balance (in shares) at Dec. 31, 2019   34,680  
Net income 298 $ 9,655 9,953
Distributions (897) (29,101) (29,998)
Balance at Jun. 30, 2020 629 $ 91,662 92,291
Balance (in shares) at Jun. 30, 2020   34,680  
Balance at Mar. 31, 2020 1,041 $ 107,103 108,144
Balance (in shares) at Mar. 31, 2020   34,680  
Net income 60 $ 1,132 1,192
Distributions (472) (16,573) (17,045)
Balance at Jun. 30, 2020 $ 629 $ 91,662 $ 92,291
Balance (in shares) at Jun. 30, 2020   34,680