Pension and Other Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2019

Pension and Other Retirement Plans [Abstract]

Schedule of Net Periodic Pension Benefit

	Three Months Ended March 31,
	2019		2018
Interest cost	$	1,974	$	1,796
Expected return on plans' assets		(2,867)		(2,894)
Amortization of actuarial loss		70		168
Net periodic pension benefit	$	(823)	$	(930)