Employee Benefit Plans Plans with Benefit Obligations in Excess of Assets Table (Details) - Pension Plans, Defined Benefit [Member] - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	$ (28,410)	$ (36,720)
Defined Benefit Plan, Benefit Obligation	(30,300)	(39,030)	$ (37,640)
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation	(12,050)	(18,420)
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, PBO	(12,080)	(18,440)
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Plan Assets	5,090	9,980
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets	$ 5,090	$ 9,980