Employee Benefit Plans Future Benefit Payments Table (Details) - Pension Plans, Defined Benefit [Member] $ in Thousands	Dec. 31, 2017 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Expected Future Benefit Payments, Next Twelve Months	$ 1,460
Expected Future Benefit Payments, Year Two	1,450
Expected Future Benefit Payments, Year Three	1,570
Expected Future Benefit Payments, Year Four	1,540
Expected Future Benefit Payments, Year Five	1,640
Expected Future Benefit Payments, Five Fiscal Years Thereafter	$ 9,180