Net Periodic Benefit Cost (Tables)

6 Months Ended

Sep. 30, 2018

Pension Plans, Defined Benefiit

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Net Benefit Costs

The following table sets forth the components of net periodic pension cost for the Company’s defined benefit pension plans (in thousands):

	Three Months Ended						Six Months Ended
	September 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017
Service costs	$	267		$	641		$	536		$	1,256
Interest cost	3,880			4,248			7,765			8,456
Expected return on plan assets	(4,605		)	(5,474		)	(9,242		)	(10,943		)
Net amortization	589			823			1,178			1,630
Net periodic pension (benefit) cost	$	131		$	238		$	237		$	399

Postemployment Retirement Benefits [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Net Benefit Costs

The following table sets forth the components of net periodic postretirement benefit cost for the Company’s defined benefit postretirement plans (in thousands):

	Three Months Ended					Six Months Ended
	September 30, 2018			September 30, 2017		September 30, 2018			September 30, 2017
Interest cost	$	28		$	35	$	57		$	70
Amortization of plan net losses	(12		)	—		(24		)	—
Net periodic postretirement cost	$	16		$	35	$	33		$	70