Pension and Other Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2020

Pension and Other Retirement Plans [Abstract]

Schedule of Net Periodic Pension Benefit

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Interest cost	$	1,559	$	1,975	$	3,118	$	3,949
Expected return on plans' assets		(2,940)		(2,866)		(5,881)		(5,733)
Amortization of actuarial loss		220		69		440		139
Net periodic pension benefit	$	(1,161)	$	(822)	$	(2,323)	$	(1,645)