Related Party Transactions and Arrangements - Fees Paid in Connection With the Operations of the Company, Incurred, Forgiven and Payable (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014
Related Party Transaction [Line Items]
Due to affiliates, net	$ 278				$ 575
Asset Management Fees | Ongoing fees:
Related Party Transaction [Line Items]
Due to affiliates, net	4	[1]			15	[1]
Transfer agent and other professional fees | Ongoing fees:
Related Party Transaction [Line Items]
Due to affiliates, net	274				560
Property management and leasing fees | Ongoing fees:
Related Party Transaction [Line Items]
Due to affiliates, net	0				0
Dividends on Class B units | Ongoing fees:
Related Party Transaction [Line Items]
Due to affiliates, net	0				0
Incurred
Related Party Transaction [Line Items]
Fees paid to related parties	3,328		674
Incurred | Asset Management Fees | Ongoing fees:
Related Party Transaction [Line Items]
Fees paid to related parties	3,144	[1]	0	[1]
Incurred | Transfer agent and other professional fees | Ongoing fees:
Related Party Transaction [Line Items]
Fees paid to related parties	184		586
Incurred | Property management and leasing fees | Ongoing fees:
Related Party Transaction [Line Items]
Fees paid to related parties	0		0
Incurred | Dividends on Class B units | Ongoing fees:
Related Party Transaction [Line Items]
Fees paid to related parties	0		88
Forgiven
Related Party Transaction [Line Items]
Fees paid to related parties	536		374
Forgiven | Asset Management Fees | Ongoing fees:
Related Party Transaction [Line Items]
Fees paid to related parties	0	[1]	0	[1]
Forgiven | Transfer agent and other professional fees | Ongoing fees:
Related Party Transaction [Line Items]
Fees paid to related parties	0		0
Forgiven | Property management and leasing fees | Ongoing fees:
Related Party Transaction [Line Items]
Fees paid to related parties	536		374
Forgiven | Dividends on Class B units | Ongoing fees:
Related Party Transaction [Line Items]
Fees paid to related parties	$ 0		$ 0

[1] Prior to the Listing, the Company caused the OP to issue to the Advisor restricted performance based Class B units for asset management services, which vested as of the Listing.