Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
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) 36,495,000 29,931,000
Common stock, shares outstanding (shares) 36,495,000 29,931,000
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 [Member]    
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) 44,258 44,258
Preferred stock, shares outstanding (shares) 44,258 44,258
Series E [Member]    
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  
Preferred stock, shares issued (shares) 27,000 1,731,000
Preferred stock, shares outstanding (shares) 27,000 1,731,000
Preferred stock, aggregate liquidation value $ 524 $ 504