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, 2015 and 2014 are as follows:



	Qualified Pension Benefits						Non-Qualified Pension Benefits				Other Benefits
	2015			2014			2015		2014		2015			2014
Components of net periodic benefit costs for the three months ended November 30 are as follows:	(Dollars in thousands)
Service cost	$	9,383		$	9,058		$	259	$	225	$	353		$	472
Interest cost	7,693			7,014			352		352		427			415
Expected return on assets	(12,014		)	(12,438		)	—		—		—			—
Prior service cost (credit) amortization	402			407			57		57		(30		)	(30		)
Actuarial (gain) loss amortization	4,754			4,901			173		261		(116		)	(105		)
Net periodic benefit cost	$	10,218		$	8,942		$	841	$	895	$	634		$	752

Employer Contributions

Total contributions to be made during fiscal 2016, will depend primarily on market returns on the pension plan assets and minimum funding level requirements. During the three months ended November 30, 2015, 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 2016, but we may make a voluntary contribution during the fourth quarter of fiscal 2016.