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Joint Ventures - Unconsolidated JV - ALP (Details) - ALP - USD ($)
$ in Millions
1 Months Ended 11 Months Ended 12 Months Ended
Nov. 30, 2018
Nov. 30, 2018
Dec. 31, 2018
Investments      
Variable interest entity, ownership percentage   23.90%  
Distributions from termination of unconsolidated joint venture $ 2.2   $ 2.2