Benefit Plans (Accrued Pension Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Retirement Benefits [Abstract]
Accumulated Benefit Obligation, end of year	$ 25,777	$ 25,457
Change in Projected Benefit Obligation
Projected Benefit Obligation, Beginning of Year	32,820	28,624
Service cost	1,200	1,001
Interest cost	1,242	1,228
Actuarial (Gain) Loss	(2,166)	2,474
Benefits Paid	(622)	(507)
Projected Benefit Obligation, End of Year	32,474	32,820
Change in Plan Assets
Plan Assets at Fair Value, Beginning of Year	0	0
Company contributions	622	507
Benefits Paid	(622)	(507)
Plan Assets at Fair Value, End of Year	0	0
Unfunded Status of the Plan	(32,474)	(32,820)
Amounts Recognized in Accumulated Other Comprehensive Income
Net loss	5,047	7,745
Total Pension Cost	$ 5,047	$ 7,745