Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements Narrative (Details)

v3.10.0.1
Fair Value Measurements Narrative (Details) - USD ($)
 3 Months Ended 12 Months Ended
Sep. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Impairment charge     $ 0 $ 0
Jeffersonville [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Impairment charge $ 49,700,000 $ 47,900,000    
Terminal capitalization rate [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Measurement input 10.00%      
Discount rate [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Measurement input 10.00%