Pension and Other Postretirement Benefit Plans (Tables)

6 Months Ended

Mar. 31, 2020

Retirement Benefits [Abstract]

Net Periodic Pension and Other Postretirement Benefit Cost

Net periodic pension and other postretirement benefit cost for the plans included the following:

	Three months ended March 31,
	Pension				Other Postretirement
	2020		2019		2020		2019
Service cost	$	2,170	$	2,000	$	64	$	61
Interest cost *	1,933		2,301		140		180
Expected return on plan assets *	(2,232)		(2,596)		—		—
Amortization:
Prior service cost	(47)		(46)		(23)		(49)
Net actuarial loss (gain) *	2,386		1,100		—		(15)
Net benefit cost	$	4,210	$	2,759	$	181	$	177

	Six months ended March 31,
	Pension				Other Postretirement
	2020		2019		2020		2019
Service cost	$	4,340	$	4,000	$	128	$	122
Interest cost *	3,866		4,602		280		360
Expected return on plan assets *	(4,464)		(5,192)		—		—
Amortization:
Prior service cost	(94)		(92)		(46)		(98)
Net actuarial loss (gain) *	4,773		2,161		—		(30)
Net benefit cost	$	8,421	$	5,479	$	362	$	354

* Non-service components of pension and postretirement expense are included in other income (deductions), net.

Contributions Made and Anticipated for the Current Fiscal Year

Contributions made and anticipated for fiscal year 2020 are as follows:

Contributions	Pension		Other Postretirement
Contributions during the six months ended March 31, 2020:
Supplemental retirement plan	$	382	$	—
Other postretirement plan	—		457
Additional contributions expected in fiscal 2020:
Supplemental retirement plan	$	500	$	—
Other postretirement plan	—		532