Pension And Other Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2018

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

The components of net periodic benefit credit for Company-sponsored pension plans for the three months ended March 31, 2018 and March 31, 2017 were as follows (in thousands):

	Pension Benefits
	Three Months Ended
	March 31, 2018			March 31, 2017
Service cost	$	293		$	186
Interest cost	17,740			19,569
Expected return on plans’ assets	(24,818		)	(25,327		)
Amortization of prior service costs	35			23
Net periodic benefit credit	$	(6,750	)	$	(5,549	)