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Investment Securities (Investments' Gross Unrealized Losses And Fair Value) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Investment [Line Items]    
Securities available for sale, Less than 12 months, Fair Value $ 109,756 $ 335,030
Securities available for sale, Less than 12 months, Unrealized Losses 636 14,778
Securities available for sale, 12 months or longer, Fair Value 221,284 50,928
Securities available for sale, 12 months or longer, Unrealized Losses 7,988 2,818
Securities available for sale, Fair Value, Total 331,040 385,958
Securities available for sale, Unrealized Losses, Total 8,624 17,596
Securities held to maturity, Less than 12 months, Fair Value 26,657  
Securities held to maturity, Less than 12 months, Unrealized Losses 165  
Securities held to maturity, Fair Value, Total 26,657  
Securities held to maturity, Unrealized Losses, Total 165  
Total Securities, Less than 12 months, Fair Value 136,413 407,299
Total Securities, Less than 12 months, Unrealized Losses 801 15,246
Total Securities, 12 months or longer, Fair Value 221,284 50,928
Total Securities, 12 months or longer, Unrealized Losses 7,988 2,818
Total Securities, Fair Value 357,697 458,227
Total Securities, Unrealized Losses 8,789 18,064
U.S. Government Agencies And Government Sponsored Enterprises [Member]
   
Investment [Line Items]    
Securities available for sale, Less than 12 months, Fair Value 44,780 86,177
Securities available for sale, Less than 12 months, Unrealized Losses 299 2,788
Securities available for sale, 12 months or longer, Fair Value 40,918 2,717
Securities available for sale, 12 months or longer, Unrealized Losses 1,169 14
Securities available for sale, Fair Value, Total 85,698 88,894
Securities available for sale, Unrealized Losses, Total 1,468 2,802
State And Political Subdivisions [Member]
   
Investment [Line Items]    
Securities held to maturity, Less than 12 months, Fair Value 9,504 72,269
Securities held to maturity, Less than 12 months, Unrealized Losses 58 468
Securities held to maturity, Fair Value, Total 9,504 72,269
Securities held to maturity, Unrealized Losses, Total 58 468
Mortgage-Backed Securities [Member]
   
Investment [Line Items]    
Securities available for sale, Less than 12 months, Fair Value 64,976 248,853
Securities available for sale, Less than 12 months, Unrealized Losses 337 11,990
Securities available for sale, 12 months or longer, Fair Value 180,366 48,211
Securities available for sale, 12 months or longer, Unrealized Losses 6,819 2,804
Securities available for sale, Fair Value, Total 245,342 297,064
Securities available for sale, Unrealized Losses, Total 7,156 14,794
Mortgage-Backed Securities [Member] | Federal National Mortgage Association [Member]
   
Investment [Line Items]    
Securities available for sale, Less than 12 months, Fair Value 44,078 103,778
Securities available for sale, Less than 12 months, Unrealized Losses 208 3,491
Securities available for sale, 12 months or longer, Fair Value 64,400 20,689
Securities available for sale, 12 months or longer, Unrealized Losses 2,020 1,319
Securities available for sale, Fair Value, Total 108,478 124,467
Securities available for sale, Unrealized Losses, Total 2,228 4,810
Securities held to maturity, Less than 12 months, Fair Value 3,264  
Securities held to maturity, Less than 12 months, Unrealized Losses 37  
Securities held to maturity, Fair Value, Total 3,264  
Securities held to maturity, Unrealized Losses, Total 37  
Mortgage-Backed Securities [Member] | Federal Home Loan Mortgage Corporation [Member]
   
Investment [Line Items]    
Securities available for sale, Less than 12 months, Fair Value   14,166
Securities available for sale, Less than 12 months, Unrealized Losses   205
Securities available for sale, 12 months or longer, Fair Value 3,478  
Securities available for sale, 12 months or longer, Unrealized Losses 42  
Securities available for sale, Fair Value, Total 3,478 14,166
Securities available for sale, Unrealized Losses, Total 42 205
Mortgage-Backed Securities [Member] | Government National Mortgage Association [Member]
   
Investment [Line Items]    
Securities available for sale, Less than 12 months, Fair Value   14,226
Securities available for sale, Less than 12 months, Unrealized Losses   142
Securities available for sale, Fair Value, Total   14,226
Securities available for sale, Unrealized Losses, Total   142
Securities held to maturity, Less than 12 months, Fair Value 13,889  
Securities held to maturity, Less than 12 months, Unrealized Losses 70  
Securities held to maturity, Fair Value, Total 13,889  
Securities held to maturity, Unrealized Losses, Total 70  
Collateralized Mortgage Obligations [Member]
   
Investment [Line Items]    
Securities available for sale, Less than 12 months, Fair Value 20,898 116,683
Securities available for sale, Less than 12 months, Unrealized Losses 129 8,152
Securities available for sale, 12 months or longer, Fair Value 112,488 27,522
Securities available for sale, 12 months or longer, Unrealized Losses 4,757 1,485
Securities available for sale, Fair Value, Total 133,386 144,205
Securities available for sale, Unrealized Losses, Total 4,886 9,637
Collateralized Mortgage Obligations [Member] | Federal National Mortgage Association [Member]
   
Investment [Line Items]    
Securities available for sale, Less than 12 months, Fair Value 18,649 35,632
Securities available for sale, Less than 12 months, Unrealized Losses 121 2,586
Securities available for sale, 12 months or longer, Fair Value 29,146 11,760
Securities available for sale, 12 months or longer, Unrealized Losses 1,237 609
Securities available for sale, Fair Value, Total 47,795 47,392
Securities available for sale, Unrealized Losses, Total 1,358 3,195
Collateralized Mortgage Obligations [Member] | Federal Home Loan Mortgage Corporation [Member]
   
Investment [Line Items]    
Securities available for sale, Less than 12 months, Fair Value   72,655
Securities available for sale, Less than 12 months, Unrealized Losses   4,980
Securities available for sale, 12 months or longer, Fair Value 77,992 15,762
Securities available for sale, 12 months or longer, Unrealized Losses 3,418 876
Securities available for sale, Fair Value, Total 77,992 88,417
Securities available for sale, Unrealized Losses, Total 3,418 5,856
Collateralized Mortgage Obligations [Member] | Government National Mortgage Association [Member]
   
Investment [Line Items]    
Securities available for sale, Less than 12 months, Fair Value 2,249 8,396
Securities available for sale, Less than 12 months, Unrealized Losses 8 586
Securities available for sale, 12 months or longer, Fair Value 5,350  
Securities available for sale, 12 months or longer, Unrealized Losses 102  
Securities available for sale, Fair Value, Total 7,599 8,396
Securities available for sale, Unrealized Losses, Total $ 110 $ 586