Employee Benefit Plans Funded Status (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	$ 87,177,000	$ 83,676,000
Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligation	(92,292,000)	(86,204,000)	$ (79,426,000)
Fair value of plan assets	87,177,000	83,676,000	57,825,000
Funded status	(5,115,000)	(2,528,000)
Other Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligation	(1,322,000)	(1,450,000)	$ (1,520,000)
Fair value of plan assets	$ 0	$ 0