Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Details)

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Employee Benefit Plans - Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Payment Arrangement [Abstract]      
Net actuarial (gain) loss $ 530 $ 183 $ (132)
Recognized actuarial loss (46) (64) (108)
Total recognized in other comprehensive income, before taxes 484 119 (240)
Total recognized in net benefit cost and other comprehensive income, before taxes $ 1,029 $ 156 $ (123)