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Employee Benefit Plans (Tables)
3 Months Ended
Mar. 31, 2021
Pension Benefits [Member]  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Components of Net Periodic Benefit Cost

Three Months Ended

March 31,

Pension Benefits

2021

2020

Interest cost

$

236

$

358

Expected return on plan assets

(584)

(609)

Amortization of unrecognized net loss

156

140

$

(192)

$

(111)