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Restricted Unit Awards Narrative (Details) - Restricted Unit Awards [Member] - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Compensation expense $ 31,000 $ 0 $ 31,000 $ 0
Unrecognized compensation expense related to nonvested RUAs granted 1,400,000   $ 1,400,000  
Remaining expense expected to be recognized over a weighted-average period     1 year  
Intrinsic value of RUAs granted $ 1,500,000   $ 1,500,000  
Burlington [Member] | Maximum [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Approved grant of restricted units and other awards to employees 3,000,000   3,000,000  
RUAs granted with vesting range     3 years  
Burlington [Member] | Minimum [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
RUAs granted with vesting range     3 months