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Investments (Gross Unrealized Losses And Fair Value Of Investments) (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Schedule of Investments [Line Items]    
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value $ 4,640 $ 109,807
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss 657 2,032
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value 199,020 304,628
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss 1,979 12,178
Securities available-for-sale, Total, Estimated Fair Value 203,660 414,435
Securities available-for-sale, Total, Unrealized Loss 2,636 14,210
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 0 28,274
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0 126
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 5,705 5,960
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 45 168
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value 5,705 34,234
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss 45 294
Obligations Of States And Political Subdivisions    
Schedule of Investments [Line Items]    
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value 0 11,837
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss 0 272
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value 5,793 22,068
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss 30 780
Securities available-for-sale, Total, Estimated Fair Value 5,793 33,905
Securities available-for-sale, Total, Unrealized Loss 30 1,052
U.S. Government Agencies Mortgage-backed Securities    
Schedule of Investments [Line Items]    
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value 38 84,975
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss 0 1,593
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value 193,227 282,560
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss 1,949 11,398
Securities available-for-sale, Total, Estimated Fair Value 193,265 367,535
Securities available-for-sale, Total, Unrealized Loss 1,949 12,991
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 0 28,274
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0 126
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 5,705 5,960
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 45 168
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value 5,705 34,234
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss 45 294
Corporate Securities    
Schedule of Investments [Line Items]    
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value   12,995
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss   167
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value   0
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss   0
Securities available-for-sale, Total, Estimated Fair Value   12,995
Securities available-for-sale, Total, Unrealized Loss   $ 167
Trust Preferred Securities    
Schedule of Investments [Line Items]    
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value 4,602  
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss 657  
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value 0  
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss 0  
Securities available-for-sale, Total, Estimated Fair Value 4,602  
Securities available-for-sale, Total, Unrealized Loss $ 657