Quarterly report pursuant to Section 13 or 15(d)

Pension Plans (Details)

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Pension Plans (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Pension Plan [Member]      
Pension Plans (Details) [Line Items]      
Projected benefit obligation, amount     $ 18,000
Fair value of plan assets     16,700
Underfunded amount     1,300
Net periodic expense $ 39,000 $ (8,000)  
Interest cost 225,000 164,000  
Service cost 62,000 101,000  
Expected return on plan assets 248,000 273,000  
Postretirement Life Insurance [Member]      
Pension Plans (Details) [Line Items]      
Projected benefit obligation, amount     $ 3,900
Net periodic expense 36,000 32,000  
Interest cost 46,000 26,000  
Service cost 3,000 $ 6,000  
Amortization of gains $ 13,000