Employee Benefit Plans (Employee Benefit Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Service cost	$ 1,010	$ 675	$ 603
Interest cost	3,130	2,806	2,773
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	66,307
Fair value of plan assets at end of year	75,321	66,307
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	92,052	80,776
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation at beginning of year	80,776	87,765
Service cost	1,010	675
Interest cost	3,130	2,806
Actuarial gain (loss)	10,561	(7,430)
Defined Benefit Plan, Benefit Obligation, Benefits Paid	(2,299)	(2,104)
Settlement	(1,126)	(936)
Projected benefit obligation at end of year	92,052	80,776	87,765
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	66,307	74,932
Actual gain (loss) on plan assets	12,439	(5,585)
Defined Benefit Plan, Plan Assets, Benefits Paid	(2,299)	(2,104)
Settlement	(1,126)	(936)
Fair value of plan assets at end of year	75,321	66,307	$ 74,932
Funded status	$ (16,731)	$ (14,469)