Annual report pursuant to Section 13 and 15(d)

Capital Stock (Details)

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Capital Stock (Details) (USD $)
12 Months Ended 1 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2003
Apr. 30, 2011
Series B Convertible Preference Shares [Member]
Dec. 31, 2003
Series B Convertible Preference Shares [Member]
Apr. 30, 2011
Common Stock [Member]
Preference Shares Disclosure [Abstract]              
Preference shares, shares issued (in shares)           2,959  
Amount of outstanding debt converted           $ 29,600,000  
Preference shares, liquidation preference (in dollars per share)           $ 10,000  
Preference shares, liquidation preference       29,600,000      
Preference shares, voting rights           The holder of the Series B preference shares had no voting rights, except as required under Bermuda law.  
Conversion price (in dollars per share)           $ 116.25  
Conversion of preference shares, shares converted (in shares)         2,959    
Conversion of preference shares, shares issued (in shares)             254,560
Equity Line of Credit [Abstract]              
Proceeds from issuance of common stock $ 84,338,000 $ 76,498,000 $ 15,143,000