Quarterly report pursuant to Section 13 or 15(d)

Employee Retirement Plans - Reconciliations (Details)

v3.20.1
Employee Retirement Plans - Reconciliations (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Pension plan          
Component of net periodic cost:          
Interest cost     $ 410    
Expected return on plan assets     (294)    
Amortization of net (gain) loss     149    
Net periodic pension cost     265    
Defined Benefit Plan Termination, Payments by Employer   $ 464      
Employer contributions during the period       $ 0  
Defined Benefit Plan Employer Discretionary Contribution Amount         $ 7,000
Other postretirement benefit cost          
Component of net periodic cost:          
Service cost $ 37   37    
Interest cost 47   63    
Amortization of net (gain) loss (77)   (78)    
Net periodic pension cost $ 7   $ 22