Employee Benefit Plans Funded Status (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	$ 83,676	$ 57,825
Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligation	(86,204)	(79,426)	$ (89,482)
Fair value of plan assets	83,676	57,825	54,061
Funded status	(2,528)	(21,601)
Other Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligation	$ (1,450)	$ (1,520)	$ (1,700)