Employee Benefits EIP (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	8.00%	8.00%	8.00%
401(k) Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 3.0	$ 3.6	$ 5.8
SERP [Member]
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	6.00%	6.00%	6.00%
Pension Plan Discretionary Contribution [Member]
Defined Contribution Plan Disclosure [Line Items]
Defined benefit plan, employer contribution		$ 0.1	$ 0.3