Pension Plans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Retirement Benefits [Abstract]
Net service cost	$ (1,109)	$ (270)
Interest cost	(166)	(81)
Expected return on plan assets	108	50
Administrative charges	(71)	(22)
Net periodic pension cost	$ (1,238)	$ (323)