Annual report pursuant to Section 13 and 15(d)

Schedule of Common Stock Issued (Details)

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Schedule of Common Stock Issued (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 1 Months Ended 12 Months Ended 60 Months Ended 132 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Feb. 28, 2013
Jan. 31, 2013
Mar. 31, 2010
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Dec. 31, 2007
Dec. 31, 2006
Dec. 31, 2012
Dec. 31, 2011
Restated
Dec. 31, 2012
Minimum
Dec. 31, 2011
Minimum
Dec. 31, 2007
Minimum
Dec. 31, 2012
Maximum
Dec. 31, 2011
Maximum
Dec. 31, 2007
Maximum
Common stock issuance, total shares 23,000,000 57,500,000   67,344,636 43,153,825   123,463 9,871 7,065,362 45,713,817 172,525,645 43,153,825            
Equity Issuance, Per Share Amount $ 10.48 $ 9.35       $ 3.13             $ 6.22 $ 4.55 $ 27.75 $ 6.71 $ 6.00 $ 31.30
Equity Issuance, Per Share Amount             N/A N/A                    
Exchange of preferred stock for common stock and cash, shares           9,091,668                        
Issuance of common stock to directors, shares           23,003                        
Common stock issuance, total proceeds $ 237,400 $ 526,200 $ 44,500 $ 434,900   $ 28,500 $ 100 $ 100 $ 201,300     $ 210,900