Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2018

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Benefit Cost (Credit)

The following table summarizes the components of net periodic benefit cost (credit) related to the Company’s pension plans for the three month periods ended March 31, 2018 and 2017:

	Pension Plans
	Three Months Ended March 31,
	2018			2017
Components of Net Periodic Benefit Cost (Credit):
Service cost	$	230		$	340
Interest cost		4,062			3,981
Expected return on plan assets		(7,783	)		(6,105	)
Amortization of:
Prior service cost		-			30
Net actuarial loss (gain)		1,278			1,332
Net periodic benefit cost (credit)	$	(2,213	)	$	(422	)