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Investment Securities (Investments' Gross Unrealized Losses And Fair Value) (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Investment [Line Items]    
Securities available for sale, Less than 12 months, Fair Value $ 82,471 $ 335,030
Securities available for sale, Less than 12 months, Unrealized Losses 207 14,778
Securities available for sale, 12 months or longer, Fair Value 236,297 50,928
Securities available for sale, 12 months or longer, Unrealized Losses 7,913 2,818
Securities available for sale, Fair Value, Total 318,768 385,958
Securities available for sale, Unrealized Losses, Total 8,120 17,596
Securities held to maturity, Less than 12 months, Fair Value 95,756 407,299
Securities held to maturity, Less than 12 months, Unrealized Losses 285 15,246
Securities held to maturity, 12 months or longer, Fair Value 236,297 50,928
Securities held to maturity, 12 months or longer, Unrealized Losses 7,913 2,818
Securities held to maturity, Fair Value, Total 332,053 458,227
Securities held to maturity, Unrealized Losses, Total 8,198 18,064
U.S. Government Agencies And Government Sponsored Enterprises [Member]
   
Investment [Line Items]    
Securities available for sale, Less than 12 months, Fair Value 30,830 86,177
Securities available for sale, Less than 12 months, Unrealized Losses 2 2,788
Securities available for sale, 12 months or longer, Fair Value 41,159 2,717
Securities available for sale, 12 months or longer, Unrealized Losses 1,048 14
Securities available for sale, Fair Value, Total 71,989 88,894
Securities available for sale, Unrealized Losses, Total 1,050 2,802
State And Political Subdivisions [Member]
   
Investment [Line Items]    
Securities held to maturity, Less than 12 months, Fair Value 13,285 72,269
Securities held to maturity, Less than 12 months, Unrealized Losses 78 468
Securities held to maturity, Fair Value, Total 13,285 72,269
Securities held to maturity, Unrealized Losses, Total 78 468
Mortgage-Backed Securities [Member]
   
Investment [Line Items]    
Securities available for sale, Less than 12 months, Fair Value 51,641 248,853
Securities available for sale, Less than 12 months, Unrealized Losses 205 11,990
Securities available for sale, 12 months or longer, Fair Value 195,138 48,211
Securities available for sale, 12 months or longer, Unrealized Losses 6,865 2,804
Securities available for sale, Fair Value, Total 246,779 297,064
Securities available for sale, Unrealized Losses, Total 7,070 14,794
Mortgage-Backed Securities [Member] | Federal National Mortgage Association [Member]
   
Investment [Line Items]    
Securities available for sale, Less than 12 months, Fair Value 34,572 103,778
Securities available for sale, Less than 12 months, Unrealized Losses 107 3,491
Securities available for sale, 12 months or longer, Fair Value 64,582 20,689
Securities available for sale, 12 months or longer, Unrealized Losses 2,110 1,319
Securities available for sale, Fair Value, Total 99,154 124,467
Securities available for sale, Unrealized Losses, Total 2,217 4,810
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 3,750  
Securities available for sale, 12 months or longer, Unrealized Losses 10  
Securities available for sale, Fair Value, Total 3,750 14,166
Securities available for sale, Unrealized Losses, Total 10 205
Mortgage-Backed Securities [Member] | Government National Mortgage Association [Member]
   
Investment [Line Items]    
Securities available for sale, Less than 12 months, Fair Value 5,440 14,226
Securities available for sale, Less than 12 months, Unrealized Losses 54 142
Securities available for sale, Fair Value, Total 5,440 14,226
Securities available for sale, Unrealized Losses, Total 54 142
Collateralized Mortgage Obligations [Member]
   
Investment [Line Items]    
Securities available for sale, Less than 12 months, Fair Value 11,629 116,683
Securities available for sale, Less than 12 months, Unrealized Losses 44 8,152
Securities available for sale, 12 months or longer, Fair Value 126,806 27,522
Securities available for sale, 12 months or longer, Unrealized Losses 4,745 1,485
Securities available for sale, Fair Value, Total 138,435 144,205
Securities available for sale, Unrealized Losses, Total 4,789 9,637
Collateralized Mortgage Obligations [Member] | Federal National Mortgage Association [Member]
   
Investment [Line Items]    
Securities available for sale, Less than 12 months, Fair Value 9,010 35,632
Securities available for sale, Less than 12 months, Unrealized Losses 22 2,586
Securities available for sale, 12 months or longer, Fair Value 37,314 11,760
Securities available for sale, 12 months or longer, Unrealized Losses 1,405 609
Securities available for sale, Fair Value, Total 46,324 47,392
Securities available for sale, Unrealized Losses, Total 1,427 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 2,619 72,655
Securities available for sale, Less than 12 months, Unrealized Losses 22 4,980
Securities available for sale, 12 months or longer, Fair Value 83,809 15,762
Securities available for sale, 12 months or longer, Unrealized Losses 3,267 876
Securities available for sale, Fair Value, Total 86,428 88,417
Securities available for sale, Unrealized Losses, Total 3,289 5,856
Collateralized Mortgage Obligations [Member] | Government National Mortgage Association [Member]
   
Investment [Line Items]    
Securities available for sale, Less than 12 months, Fair Value   8,396
Securities available for sale, Less than 12 months, Unrealized Losses   586
Securities available for sale, 12 months or longer, Fair Value 5,683  
Securities available for sale, 12 months or longer, Unrealized Losses 73  
Securities available for sale, Fair Value, Total 5,683 8,396
Securities available for sale, Unrealized Losses, Total $ 73 $ 586