Quarterly report pursuant to Section 13 or 15(d)

Held-to-Maturity Securities (Details Textuals)

v2.3.0.15
Held-to-Maturity Securities (Details Textuals) (USD $)
9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Schedule of Held-to-maturity Securities [Line Items]    
Purchases of held-to-maturity securities $ 204,188,000 $ 0
Held-to-Maturity Securities (Textuals)    
Unrealized net losses recognized in OCI at time of transfer of available for sale securities transferred to Held To Maturity Securities 500,000  
Federal agencies - mortgage backed securities [Member]
   
Schedule of Held-to-maturity Securities [Line Items]    
Available for sale securities transferred to held to maturity securities $ 469,100,000