Subsequent Events - Amended and Restated Expense Support Agreement (Details) - Subsequent Event - Advisor - Amended and Restated Expense Support Agreement	Jul. 01, 2017 USD ($)
Subsequent Event [Line Items]
Maximum for aggregate of the deferred fixed component of the advisory fee and the Deficiency support payments	$ 15,000,000
Period the Company may not be obligated to reimburse Advisor under agreement terms	3 years
Expense Support Agreement termination notice period	30 days

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration