Employee Benefit Plans (Schedule of Net Funded Status) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance	$ 47,216
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	43,056	$ 47,216
Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Beginning Balance	44,975	41,086
Defined Benefit Plan, Service Cost	324	278
Defined Benefit Plan, Interest Cost	1,586	1,650
Defined Benefit Plan, Other Changes	0	3,285
Defined Benefit Plan, Actuarial Gain (Loss)	(3,049)	450
Defined Benefit Plan, Benefits Paid	(1,814)	(1,774)
Defined Benefit Plan, Benefit Obligation, Ending Balance	42,022	44,975
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance	47,216	40,989
Defined Benefit Plan, Actual Return on Plan Assets	(2,346)	5,001
Defined Benefit Plan, Contributions by Employer	0	3,000
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	43,056	47,216
Defined Benefit Plan, Unfunded Status of Plan	1,034	2,241
SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Beginning Balance	7,613	7,302
Defined Benefit Plan, Service Cost	112	113
Defined Benefit Plan, Interest Cost	321	293
Defined Benefit Plan, Other Changes	0	0
Defined Benefit Plan, Actuarial Gain (Loss)	(276)	112
Defined Benefit Plan, Benefits Paid	(226)	(207)
Defined Benefit Plan, Benefit Obligation, Ending Balance	7,544	7,613
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance	0	0
Defined Benefit Plan, Actual Return on Plan Assets	0	0
Defined Benefit Plan, Contributions by Employer	226	207
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	0	0
Defined Benefit Plan, Unfunded Status of Plan	$ (7,544)	$ (7,613)