Quarterly report pursuant to Section 13 or 15(d)

Debt - Construction Loan (Details)

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Debt - Construction Loan (Details) - Construction Loan
9 Months Ended
Sep. 30, 2018
USD ($)
Debt Instrument [Line Items]  
Debt, face amount $ 200,000,000
Optional extension term 1 year
Borrowings outstanding $ 40,000,000
LIBOR  
Debt Instrument [Line Items]  
Interest rate 2.70%