Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Common stock, par value (usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (shares)	150,000,000	150,000,000
Common stock, shares issued (shares)	47,100,000	39,506,000
Common stock, shares outstanding (shares)	47,100,000	39,506,000
Series A [Member]
Preferred stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, per share liquidation value (usd per share)	$ 1,000	$ 1,000
Preferred stock, shares authorized (shares)	5,000,000	5,000,000
Preferred stock, shares issued (shares)	0	0
Preferred stock, shares outstanding (shares)	0	0
Series B Preferred Stock
Preferred stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, per share liquidation value (usd per share)	$ 29	$ 29
Preferred stock, shares authorized (shares)	5,000,000	5,000,000
Preferred stock, shares issued (shares)	44,000	44,000
Preferred stock, shares outstanding (shares)	44,000	44,000
Series E Preferred Stock
Preferred stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (shares)	5,000,000	5,000,000
Preferred stock, per share redemption value (usd per share)	$ 10	$ 10
Preferred stock, redemption shares (in shares)	1,551,000	1,551,000
Preferred stock, shares issued (shares)	27,000	27,000
Preferred stock, shares outstanding (shares)	27,000	27,000
Preferred stock, aggregate liquidation value	$ 533	$ 524