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Employee Benefit Plans - Annual retirement plan expense assumptions (Details)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Retirement Benefits [Abstract]      
Discount rate 2.64% 340.00% 438.00%
Long-term rate of return on plan assets 5.50% 5.50% 5.50%