Quarterly report pursuant to Section 13 or 15(d)

Subordinated Notes (Details)

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Subordinated Notes (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Debt Instrument [Line Items]    
Debt Instrument, Carrying Amount $ 312,894  
Subordinated Debt $ 1,188,674 $ 1,197,091