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PENSION LIABILITY (Tables)
6 Months Ended
Jun. 30, 2020
PENSION LIABILITY  
Schedule of net funded status

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June 30, 

    

December 31, 

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2020

​

2019

Pension liability

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$

67,451

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$

68,359

Schedule of net periodic pension benefit costs

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Three Months Ended June 30, 

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Six Months Ended June 30, 

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2020

    

2019

    

2020

    

2019

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Service cost

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$

264

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$

—

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$

522

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$

—

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Interest cost

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​

499

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​

195

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​

979

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​

394

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Expected return on plan assets

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(142)

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(166)

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(290)

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(336)

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Amortization of actuarial gains and losses

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112

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​

115

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​

228

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​

233

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Net periodic pension cost

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$

733

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$

144

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$

1,439

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$

291

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