Benefit Plans

We have various pension and other defined benefit and defined contribution plans, in which substantially all employees may participate. We also have non-qualified supplemental executive and Board retirement plans.

Components of net periodic benefit costs for the three months ended November 30, 2016, and 2015 are as follows:



	Qualified Pension Benefits						Non-Qualified Pension Benefits				Other Benefits
	2016			2015			2016		2015		2016			2015
Components of net periodic benefit costs for the three months ended November 30 are as follows:	(Dollars in thousands)
Service cost	$	9,383		$	9,383		$	259	$	259	$	353		$	353
Interest cost	7,692			7,693			352		352		427			427
Expected return on assets	(12,014		)	(12,014		)	—		—		—			—
Prior service cost (credit) amortization	402			402			57		57		(30		)	(30		)
Actuarial (gain) loss amortization	4,765			4,754			173		173		(116		)	(116		)
Net periodic benefit cost	$	10,228		$	10,218		$	841	$	841	$	634		$	634

Employer Contributions

Total contributions to be made during fiscal 2017, will depend primarily on market returns on the pension plan assets and minimum funding level requirements. During the three months ended November 30, 2016, we made no contributions to the pension plans. At this time, we do not anticipate having to make a required contribution for our benefit plans in fiscal 2017, but we may make a voluntary contribution during the fourth quarter of fiscal 2017.