Related Party Transactions and Arrangements - General and Administrative Expense (Details) - Affiliates of Former Manager [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2014 USD ($)
Related Party Transaction [Line Items]
General and administrative expenses	$ 16,089
Advisory Fees And Reimbursements [Member]
Related Party Transaction [Line Items]
General and administrative expenses	2,015
Equity Awards [Member]
Related Party Transaction [Line Items]
General and administrative expenses	$ 14,074