Pension and Other Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2020

Pension and Other Retirement Plans [Abstract]

Schedule of Net Periodic Pension Benefit

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Interest cost	$	1,559	$	1,973	$	4,677	$	5,922
Expected return on plans' assets		(2,941)		(2,866)		(8,822)		(8,599)
Amortization of actuarial loss		220		70		660		209
Net periodic pension benefit	$	(1,162)	$	(823)	$	(3,485)	$	(2,468)