XML 21 R57.htm IDEA: XBRL DOCUMENT v3.20.1
Employee Benefit Plan - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Pension Plan    
Components of net periodic benefit cost    
Service cost $ 0 $ 0
Interest cost 641 745
Expected return on plan assets (1,355) (1,234)
Amortization of net retirement plan actuarial loss 350 337
Amortization of net retirement plan prior service (credit) cost (3) (3)
Net periodic benefit (income) cost (367) (155)
Life and Health    
Components of net periodic benefit cost    
Service cost 41 50
Interest cost 64 73
Expected return on plan assets 0 0
Amortization of net retirement plan actuarial loss 26 0
Amortization of net retirement plan prior service (credit) cost (15) (15)
Net periodic benefit (income) cost 116 108
SERP Benefits    
Components of net periodic benefit cost    
Service cost 46 37
Interest cost 240 229
Expected return on plan assets 0 0
Amortization of net retirement plan actuarial loss 225 85
Amortization of net retirement plan prior service (credit) cost 71 22
Net periodic benefit (income) cost $ 582 $ 373