Post-retirement Plan (Tables)

6 Months Ended

Jun. 30, 2019

Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]

Schedule of Costs of Retirement Plans

net periodic pension expense consisted of the following components:

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
	(In thousands)
Service cost - benefit earned during the period	$	1,198		$	1,106		$	2,397		$	2,235
Interest cost on projected benefit obligations	440			563			877			1,138
Expected return on plan assets	(811		)	(867		)	(1,621		)	(1,752		)
Amortization of loss	830			—			1,660			—
Net periodic pension expense	$	1,657		$	802		$	3,313		$	1,621

Net Periodic Pension Expense

The net periodic benefit credit of our post-retirement healthcare and other benefits plans consisted of the following components

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
	(In thousands)
Service cost – benefit earned during the period	$	386		$	412		$	771		$	826
Interest cost on projected benefit obligations	266			234			531			471
Amortization of prior service credit	(870		)	(870		)	(1,741		)	(1,741		)
Amortization of gain	(22		)	—			(44		)	—
Net periodic post-retirement credit	$	(240	)	$	(224	)	$	(483	)	$	(444	)