Related Party Arrangements - Management Agreement (Details) - Management agreement - Affiliated Entity - Manager	Jan. 31, 2018
Related Party Transaction [Line Items]
Renewal term	1 year
Termination period	180 days
Refusal to renew contract, number of days required for written notice to avoid termination fee	180 days
Breach of contract, number of days after written notice, in which case, termination fee will apply	30 days
Minimum
Related Party Transaction [Line Items]
Termination of agreement, number of days required for written notice to avoid termination fee	30 days
Termination for breach of contract, number of days required for written notice	60 days