Summary of Significant Accounting Policies - Distributions and Dividends and Reacquired Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Class of Stock [Line Items]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Distributions payable	$ 15,140	$ 13,827
Common Stock, Dividends, Per Share, Declared	$ 0.18	$ 0.10	$ 0.02
Dividend Declared [Member]
Class of Stock [Line Items]
Common Stock, Dividends, Per Share, Declared	$ 0.18	$ 0.10	$ 0.02