Benefit Plans (Accrued Pension Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Accumulated Benefit Obligation, end of year	$ 22,515	$ 20,323
Change in Projected Benefit Obligation
Projected benefit obligation, beginning of period	25,935	25,826
Service cost	995	1,173
Interest cost	1,155	1,082
Actuarial (Gain) Loss	1,031	(1,818)
Benefits Paid	(492)	(328)
Projected benefit obligation, end of period	28,624	25,935
Change in Plan Assets
Plan assets at fair value, beginning of period	0	0
Company contributions	492	328
Benefits Paid	(492)	(328)
Plan assets at fair value, end of period	0	0
Unfunded Status of the Plan	(28,624)	(25,935)
Amounts Recognized in Accumulated Other Comprehensive Income
Net loss	5,561	4,743
Total Pension Cost	$ 5,561	$ 4,743