Private Placement (Details) (USD $)	0 Months Ended			12 Months Ended
	Oct. 23, 2012	Jun. 23, 2011	May 06, 2011	Dec. 31, 2011
Class of Stock [Line Items]
Number of shares issued in Private Placement (in shares)		151,681	3,081,867	3,233,548
Proceeds from the issuance of private placement	$ 41,800,000		$ 6,400,000
Stock issued during period, discount on price per share, percent		10.00%	10.00%
Conversion price of convertible stock (in dollars per share)	$ 2.80
Proceeds from issuance of mandatorily convertible cumulative non-voting perpetual preferred stock	45,000,000
Series A Preferred Stock | Issuance of Equity
Class of Stock [Line Items]
Number of shares issued in Private Placement (in shares)	45,000
Value per share of shares sold in Private Placement (in dollars per share)	$ 1,000
Conversion price of convertible stock (in dollars per share)	$ 2.80
Proceeds from issuance of mandatorily convertible cumulative non-voting perpetual preferred stock	42,500,000
Series T Preferred Stock and Series T-ACB Preferred Stock | Exchange of Equity
Class of Stock [Line Items]
Value of stock converted	$ 20,900,000