Related Party Transactions and Arrangements - Investment in an Affiliate of the Former Manager (Details) - Affiliates of Former Manager [Member] - Investments in Real Estate Fund [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014
Related Party Transaction [Line Items]
Investment in real estate fund	$ 10.0
Proceeds from reinvested dividends	$ 0.1
Remaining investment in real estate fund		$ 0.1