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Unit-Based Compensation (Cash Awards) - Additional Information (Details) - USD ($)
$ in Millions
1 Months Ended 9 Months Ended
Sep. 30, 2015
Jan. 31, 2015
Sep. 30, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Weighted average period     1 year 2 months 5 days
Long-Term Cash Restricted Unit Plan [Member] | Cash Awards [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Granted (in shares) 1,000 30,710  
Forfeited (in shares)     3,470
Fair value of nonvested awards outstanding     $ 1.4
Unrecognized compensation cost     $ 0.5
Long-Term Cash Restricted Unit Plan [Member] | Cash Awards [Member] | Share Based Compensation Award Tranche One [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Vesting percentage of awards granted     100.00%
Maximum [Member] | Director [Member] | 2012 Long Term Incentive Plan [Member] | Share Based Compensation Award Tranche One [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Vesting Period     3 years