CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares		3 Months Ended		12 Months Ended
	Apr. 15, 2013	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Preferred Stock, dividend rate		7.50%		7.50%
Preferred Stock | Preferred Stock 7.50% Series B Cumulative Redeemable - Liquidation Preference $25.00 per Share
Preferred Stock, dividend rate	7.50%	7.50%	7.50%
Preferred Stock, liquidation preference per share (in dollars per share)	$ 25.00	$ 25.00	$ 25.00