Employee Benefit Plans (Components of Net Periodic Pension Plan Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	$ 39	$ 57	$ 117	$ 169
Interest Cost	355	406	1,066	1,219
Expected return on assets	(892)	(887)	(2,677)	(2,661)
Amortization of net actuarial loss/recognized loss	372	358	1,116	1,074
Net pension credit included in employee benefits and other expense	(126)	(66)	(378)	(199)
SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	35	31	104	93
Interest Cost	60	67	179	201
Amortization of net actuarial loss/recognized loss	75	47	226	141
Amortization of prior service cost		(1)	(1)	(2)
Net pension credit included in employee benefits and other expense	$ 170	$ 144	$ 508	$ 433