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 and six months ended February 29, 2016 and February 28, 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 February 29, 2016 and February 28, 2015 are as follows:	(Dollars in thousands)
Service cost	$	9,383		$	9,058		$	259	$	225	$	353		$	474
Interest cost	7,691			7,002			351		352		428			415
Expected return on assets	(12,013		)	(12,436		)	—		—		—			—
Prior service cost (credit) amortization	401			409			57		57		(30		)	(30		)
Actuarial (gain) loss amortization	4,775			4,907			173		261		(116		)	(106		)
Net periodic benefit cost	$	10,237		$	8,940		$	840	$	895	$	635		$	753
Components of net periodic benefit costs for the six months ended February 29, 2016 and February 28, 2015 are as follows:
Service cost	$	18,766		$	18,116		$	518	$	450	$	706		$	946
Interest cost	15,384			14,016			703		704		855			830
Expected return on assets	(24,027		)	(24,874		)	—		—		—			—
Prior service cost (credit) amortization	803			816			114		114		(60		)	(60		)
Actuarial (gain) loss amortization	9,529			9,808			346		522		(232		)	(211		)
Net periodic benefit cost	$	20,455		$	17,882		$	1,681	$	1,790	$	1,269		$	1,505

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 six months ended February 29, 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 2016, but we may make a voluntary contribution during the fourth quarter of fiscal 2016.