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Subsequent Events (Details) - Line of credit - USD ($)
$ in Millions
Apr. 13, 2017
Mar. 31, 2017
Subsequent Event [Line Items]    
Credit facility, maximum borrowing capacity   $ 871.3
Secured Debt    
Subsequent Event [Line Items]    
Credit facility, maximum borrowing capacity   $ 21.3
Subsequent Event [Member] | Secured Debt | Syndicated Banks [Member]    
Subsequent Event [Line Items]    
Credit facility, maximum borrowing capacity $ 800.0