Annual report pursuant to Section 13 and 15(d)

Indebtedness - Schedule of Maturities of Debt, Excluding Debt Discount (Details)

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Indebtedness - Schedule of Maturities of Debt, Excluding Debt Discount (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Debt Disclosure [Abstract]    
2018 $ 24,476  
2019 36,585  
2020 394,850  
2021 313,852  
2022 59,379  
Thereafter 486,586  
Subtotal 1,315,728  
Less: Debt discount (20,783)  
Total $ 1,294,945 $ 898,023