Annual report pursuant to Section 13 and 15(d)

Subordinated Notes (Details Textuals)

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Subordinated Notes (Details Textuals) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Debt Instruments [Abstract]      
Retired Subordinated Notes $ 230,300,000 $ 36,100,000  
Gains (Losses) on Extinguishment of Debt $ 798,000 $ 9,697,000 $ 0