Employee Benefit Plans (Schedule of Changes in Benefit Obligation and Plan Assets) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Amounts recognized in accumulated other comprehensive loss
Total		$ 3,470	$ 2,157	$ 3,988	$ 2,130
Supplemental Executive Retirement Plan [Member]
Benefit obligations:
Beginning of year		12,717	13,790
Service cost	[1]	395	446	335
Interest cost	[2]	523	488	452
Actuarial loss (gain)		1,524	(1,534)
Defined Benefit Plan, Benefit Obligation, Benefits Paid		477	473
End of year		14,682	12,717	13,790
Fair value of plan assets:
Beginning of year		0	0
Employer contributions		477	473
Defined Benefit Plan, Plan Assets, Benefits Paid		477	473
End of year		0	0	0
Unfunded status at end of year(1)	[3]	14,682	12,717
Amounts recognized in accumulated other comprehensive loss
Net actuarial loss		2,864	1,859
Total		2,864	1,859
Other Postretirement Benefits Plan [Member]
Benefit obligations:
Beginning of year		3,616	3,791
Service cost	[1]	48	46	53
Interest cost	[2]	148	132	144
Actuarial loss (gain)		394	(209)
Defined Benefit Plan, Benefit Obligation, Benefits Paid		157	144
End of year		4,049	3,616	3,791
Fair value of plan assets:
Beginning of year		0	0
Employer contributions		157	144
Defined Benefit Plan, Plan Assets, Benefits Paid		157	144
End of year		0	0	$ 0
Unfunded status at end of year(1)	[3]	4,049	3,616
Amounts recognized in accumulated other comprehensive loss
Net actuarial loss		738	449
Prior service credit		(132)	(151)
Total		$ 606	$ 298

[1] (1)Presented in salaries and employee benefits on the consolidated statements of income.

[2] (2)Presented in other expenses on the consolidated statements of income.

[3] 1)Presented within other liabilities on the consolidated statements of condition.