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Securities (Summaries Of Fair Values And Unrealized Losses Of Securities, Segregated By Length Of Impairment) (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Schedule of Held-to-maturity Securities [Line Items]    
Securities available for sale, Less than 12 Months, Fair Value $ 77,574 $ 130
Securities available for sale, Less than 12 Months, Unrealized Losses (1,478) (10)
Securities available for sale, Greater than 12 Months, Fair Value 10,966 11,854
Securities available for sale, Greater than 12 Months, Unrealized Losses (13,675) (14,906)
Securities available for sale, Fair Value, Total 88,540 11,984
Securities available for sale, Unrealized Losses, Total (15,153) (14,916)
Securities held to maturity, Less than 12 Months, Fair Value 13,347 18,285
Securities held to maturity, Less than 12 Months, Unrealized Losses (17) (75)
Securities held to maturity, Greater than 12 Months, Fair Value 4,719 6,773
Securities held to maturity, Greater than 12 Months, Unrealized Losses (111) (1,804)
Securities held to maturity, Fair Value, Total 18,066 25,058
Securities held to maturity, Unrealized Losses, Total (128) (1,879)
Agency Mortgage-Backed Securities [Member]
   
Schedule of Held-to-maturity Securities [Line Items]    
Securities available for sale, Less than 12 Months, Fair Value 63,593  
Securities available for sale, Less than 12 Months, Unrealized Losses (114)  
Securities available for sale, Fair Value, Total 63,593  
Securities available for sale, Unrealized Losses, Total (114)  
Collateralized Debt Obligations [Member]
   
Schedule of Held-to-maturity Securities [Line Items]    
Securities available for sale, Less than 12 Months, Fair Value 11,338  
Securities available for sale, Less than 12 Months, Unrealized Losses (1,340)  
Securities available for sale, Greater than 12 Months, Fair Value 5,392 5,998
Securities available for sale, Greater than 12 Months, Unrealized Losses (12,380) (13,226)
Securities available for sale, Fair Value, Total 16,730 5,998
Securities available for sale, Unrealized Losses, Total (13,720) (13,226)
Securities held to maturity, Greater than 12 Months, Fair Value 700 1,278
Securities held to maturity, Greater than 12 Months, Unrealized Losses (87) (314)
Securities held to maturity, Fair Value, Total 700 1,278
Securities held to maturity, Unrealized Losses, Total (87) (314)
Other Debt Obligations [Member]
   
Schedule of Held-to-maturity Securities [Line Items]    
Securities available for sale, Less than 12 Months, Fair Value 2,003  
Securities available for sale, Greater than 12 Months, Fair Value 5,574 5,197
Securities available for sale, Greater than 12 Months, Unrealized Losses (1,295) (1,666)
Securities available for sale, Fair Value, Total 7,577 5,197
Securities available for sale, Unrealized Losses, Total (1,295) (1,666)
Securities held to maturity, Greater than 12 Months, Fair Value 1,310 1,144
Securities held to maturity, Greater than 12 Months, Unrealized Losses (11) (181)
Securities held to maturity, Fair Value, Total 1,310 1,144
Securities held to maturity, Unrealized Losses, Total (11) (181)
Equity Securities [Member]
   
Schedule of Held-to-maturity Securities [Line Items]    
Securities available for sale, Less than 12 Months, Fair Value 640 100
Securities available for sale, Less than 12 Months, Unrealized Losses (24) (9)
Securities available for sale, Greater than 12 Months, Fair Value   659
Securities available for sale, Greater than 12 Months, Unrealized Losses   (14)
Securities available for sale, Fair Value, Total 640 759
Securities available for sale, Unrealized Losses, Total (24) (23)
Non-Agency Collateralized Mortgage obligations [Member]
   
Schedule of Held-to-maturity Securities [Line Items]    
Securities available for sale, Less than 12 Months, Fair Value   30
Securities available for sale, Less than 12 Months, Unrealized Losses   (1)
Securities available for sale, Fair Value, Total   30
Securities available for sale, Unrealized Losses, Total   (1)
Securities held to maturity, Less than 12 Months, Fair Value   5,374
Securities held to maturity, Less than 12 Months, Unrealized Losses   (64)
Securities held to maturity, Greater than 12 Months, Fair Value 2,709 4,351
Securities held to maturity, Greater than 12 Months, Unrealized Losses (13) (1,309)
Securities held to maturity, Fair Value, Total 2,709 9,725
Securities held to maturity, Unrealized Losses, Total (13) (1,373)
U.S. Treasury And Other U.S. Government Agencies And Corporations [Member]
   
Schedule of Held-to-maturity Securities [Line Items]    
Securities held to maturity, Less than 12 Months, Fair Value 10,049  
Securities held to maturity, Less than 12 Months, Unrealized Losses (10)  
Securities held to maturity, Fair Value, Total 10,049  
Securities held to maturity, Unrealized Losses, Total (10)  
States Of The U.S. And Political Subdivisions [Member]
   
Schedule of Held-to-maturity Securities [Line Items]    
Securities held to maturity, Less than 12 Months, Fair Value 3,298  
Securities held to maturity, Less than 12 Months, Unrealized Losses (7)  
Securities held to maturity, Fair Value, Total 3,298  
Securities held to maturity, Unrealized Losses, Total (7)  
Agency Collateralized Mortgage obligations [Member]
   
Schedule of Held-to-maturity Securities [Line Items]    
Securities held to maturity, Less than 12 Months, Fair Value   12,911
Securities held to maturity, Less than 12 Months, Unrealized Losses   (11)
Securities held to maturity, Fair Value, Total   12,911
Securities held to maturity, Unrealized Losses, Total   $ (11)