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Investments (Gross Unrealized Losses And Fair Value Of Investments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Schedule of Investments [Line Items]    
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value $ 69,600 $ 109,807
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss 1,095 2,032
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value 53,750 304,628
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss 636 12,178
Securities available-for-sale, Total, Estimated Fair Value 123,350 414,435
Securities available-for-sale, Total, Unrealized Loss 1,731 14,210
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value   28,274
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss   126
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value   5,960
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss   168
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value   34,234
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss   294
Obligations Of States And Political Subdivisions    
Schedule of Investments [Line Items]    
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value 230 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 1,439 22,068
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss 7 780
Securities available-for-sale, Total, Estimated Fair Value 1,669 33,905
Securities available-for-sale, Total, Unrealized Loss 7 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 50,385 84,975
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss 356 1,593
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value 52,311 282,560
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss 629 11,398
Securities available-for-sale, Total, Estimated Fair Value 102,696 367,535
Securities available-for-sale, Total, Unrealized Loss 985 12,991
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value   28,274
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss   126
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value   5,960
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss   168
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value   34,234
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss   294
Corporate Securities    
Schedule of Investments [Line Items]    
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value 15,035 12,995
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss 144 167
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value 0 0
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss 0 0
Securities available-for-sale, Total, Estimated Fair Value 15,035 12,995
Securities available-for-sale, Total, Unrealized Loss 144 $ 167
Trust Preferred Securities    
Schedule of Investments [Line Items]    
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value 3,950  
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss 595  
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 3,950  
Securities available-for-sale, Total, Unrealized Loss $ 595