Pension and Other Postretirement Benefits (Tables)

3 Months Ended

Oct. 31, 2015

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Schedule of Net Benefit Costs

The components of net periodic pension and postretirement health benefit costs were as follows:

	Pension Benefits
	(in thousands)
	For the Three Months Ended October 31,
	2015			2014
Service cost	$	489		$	432
Interest cost	483			468
Expected return on plan assets	(477		)	(470		)
Amortization of:
Prior service costs	2			2
Other actuarial loss	287			150
Net periodic benefit cost	$	784		$	582
	Postretirement Health Benefits
	(in thousands)
	For the Three Months Ended October 31,
	2015			2014
Service cost	$	22		$	33
Interest cost	20			27
Amortization of:
Prior service costs	(2		)	(2		)
Other actuarial loss	—			9
Net periodic benefit cost	$	40		$	67

Schedule of Assumptions Used

Assumptions used in the previous calculations were as follows:

	Pension Benefits				Postretirement Health Benefits
	For the Three Months Ended October 31,
	2015		2014		2015		2014
Discount rate for net periodic benefit cost	4.22	%	4.28	%	3.51	%	3.87	%
Rate of increase in compensation levels	3.50	%	3.50	%	—		—
Long-term expected rate of return on assets	7.50	%	7.50	%	—		—

The medical cost trend assumption for postretirement health benefits was 7.5%. The graded trend rate is expected to decrease to an ultimate rate of 4.0% in fiscal 2035.