Investments (Gross Unrealized Losses And Fair Value Of Investments) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Investments [Line Items]
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value	$ 111,307	$ 187,052
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2,099	2,054
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value	304,628	162,016
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	12,178	5,871
Securities available-for-sale, Total, Estimated Fair Value	415,935	349,068
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	14,277	7,925
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	28,274	7,182
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	126	25
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	5,960	0
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	168	0
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value	34,234	7,182
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss	294	25
Obligations of states and political subdivisions
Schedule of Investments [Line Items]
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value	11,837	4,913
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	272	28
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value	22,068	19,440
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	780	379
Securities available-for-sale, Total, Estimated Fair Value	33,905	24,353
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	1,052	407
U.S. Government agencies
Schedule of Investments [Line Items]
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value	84,975	172,807
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,593	1,887
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value	282,560	140,226
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	11,398	5,418
Securities available-for-sale, Total, Estimated Fair Value	367,535	313,033
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	12,991	7,305
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	28,274	7,182
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	126	25
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	5,960	0
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	168	0
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value	34,234	7,182
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss	294	25
Trust preferred securities
Schedule of Investments [Line Items]
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value		4,475
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		54
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value		0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0
Securities available-for-sale, Total, Estimated Fair Value		4,475
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		54
Corporate securities
Schedule of Investments [Line Items]
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value	12,995	3,357
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	167	49
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value	0	2,350
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	74
Securities available-for-sale, Total, Estimated Fair Value	12,995	5,707
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	167	123
Investment funds
Schedule of Investments [Line Items]
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value	1,500	1,500
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	67	36
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Securities available-for-sale, Total, Estimated Fair Value	1,500	1,500
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 67	$ 36