Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Weighted Average Assumptions Used to Determine Benefit Obligation and Net Periodic Benefit Costs (Details)

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Employee Benefit Plans - Weighted Average Assumptions Used to Determine Benefit Obligation and Net Periodic Benefit Costs (Details)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Retirement Benefits [Abstract]    
Discount rate 2.99% 4.36%
Rate of compensation increase 3.00% 3.00%