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Net Periodic Pension Cost (Tables)
9 Months Ended
Sep. 30, 2021
Net Periodic Pension Cost [Abstract]  
Schedule of Net Benefit Costs

The following table details the net periodic pension cost incurred by period (in thousands):

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​

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​

​

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Three Months Ended

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Nine Months Ended

​

 

September 30, 

 

 

September 30, 

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2021

    

2020

    

2021

    

2020

Interest cost

 

$

67

 

$

89

 

$

202

 

$

266

Amortization of net loss

​

​

43

​

​

34

​

​

130

​

​

104

Expected return on plan assets

​

​

(177)

​

​

(171)

​

​

(531)

​

​

(513)

Net periodic pension cost

 

$

(67)

 

$

(48)

 

$

(199)

 

$

(143)

Contributed amount

 

$

—

 

$

—

 

$

—

 

$

—