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Earnings Per Unit ("EPU") (Narrative) (Details)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Earnings Per Unit ("EPU") [Abstract]      
Anti-dilutive LTIP phantom units 0us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 12,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 0us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount