Annual report pursuant to Section 13 and 15(d)

Intangible Assets (Intangible Assets and Amortization Expense) (Details)

v3.8.0.1
Intangible Assets (Intangible Assets and Amortization Expense) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]    
Intangible assets $ 63,765 $ 63,350
Accumulated amortization (1,787) (1,601)
Total intangible assets 61,978 61,749
Management Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets 61,708 61,293
Lease Premium [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets $ 2,057 $ 2,057