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Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Retirement Benefits [Abstract]
Service cost	$ 304	$ 287	$ 937	$ 856
Interest cost	256	297	776	875
Amortization of actuarial loss	1,197	2,273	3,649	7,325
Net periodic pension cost	$ 1,757	$ 2,857	$ 5,362	$ 9,056
Actuarial losses as a percentage of defined benefit obligations			10.00%

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