Subsequent Events (Details) - USD ($)																	3 Months Ended		6 Months Ended
	Aug. 17, 2015	Aug. 15, 2015	Jul. 27, 2015	Jul. 15, 2015	Jun. 29, 2015	Jun. 15, 2015	May. 15, 2015	Apr. 27, 2015	Apr. 15, 2015	Mar. 27, 2015	Mar. 13, 2015	Feb. 27, 2015	Feb. 13, 2015	Jan. 27, 2015	Jan. 15, 2015	May. 27, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Subsequent Event [Line Items]
Common stock, dividends declared (in usd per share)						$ 0.04	$ 0.04		$ 0.04		$ 0.04		$ 0.04		$ 0.04		$ 0.12	$ 0.15	$ 0.24	$ 0.30
Series A Preferred Stock
Subsequent Event [Line Items]
Rate per preferred share cash paid (in usd per share)					$ 0.17			$ 0.17		$ 0.17		$ 0.17		$ 0.17		$ 0.17
Preferred stock, aggregate paid to holders of record					$ 374,800			$ 374,800		$ 374,800		$ 374,800		$ 374,800		$ 374,800			$ 2,249,000	$ 2,250,000
Series B Preferred Stock
Subsequent Event [Line Items]
Rate per preferred share cash paid (in usd per share)					$ 0.16			$ 0.16		$ 0.16		$ 0.16		$ 0.16		$ 0.16
Preferred stock, aggregate paid to holders of record					$ 927,000			$ 927,000		$ 927,000		$ 927,000		$ 927,000		$ 927,000			$ 5,562,000	$ 5,562,000
Scenario, Forecast
Subsequent Event [Line Items]
Common stock, dividends declared (in usd per share)	$ 0.33
Scenario, Forecast | Series A Preferred Stock
Subsequent Event [Line Items]
Rate per preferred share dividends declared (in usd per share)		$ 0.17
Scenario, Forecast | Series B Preferred Stock
Subsequent Event [Line Items]
Rate per preferred share dividends declared (in usd per share)		$ 0.16
Subsequent Event
Subsequent Event [Line Items]
Common stock, dividends declared (in usd per share)				$ 0.04
Common stock, dividends declared stock split equivalent (in usd per share)				$ 0.32
Subsequent Event | Series A Preferred Stock
Subsequent Event [Line Items]
Rate per preferred share cash paid (in usd per share)			$ 0.17
Preferred stock, aggregate paid to holders of record			$ 375,000
Subsequent Event | Series B Preferred Stock
Subsequent Event [Line Items]
Rate per preferred share cash paid (in usd per share)			$ 0.16
Preferred stock, aggregate paid to holders of record			$ 927,000