Employee Benefit Plans (Tables)

12 Months Ended

Jul. 31, 2015

Compensation and Retirement Disclosure [Abstract]

Schedule of Changes in Accumulated Postemployment Benefit Obligations

The following table provides a reconciliation of the changes in the Plan’s accumulated benefit obligation during the years ended July 31:

	2015			2014
Obligation at beginning of year	$	8,056		$	13,023
Service cost	210			674
Interest cost	222			534
Actuarial loss (gain)	502			(4,691		)
Benefit payments	(365		)	(473		)
Plan amendments	(1,935		)	(1,011		)
Curtailment gain	(2,555		)	—
Obligation at end of fiscal year	$	4,135		$	8,056

Schedule of Amounts Recognized in Balance Sheet

As of July 31, 2015 and 2014, amounts recognized as liabilities in the accompanying Consolidated Balance Sheets consist of:

	2015		2014
Current liability	$	659	$	476
Non-current liability	3,476		7,580
	$	4,135	$	8,056

Schedule of Amounts Recognized in Other Comprehensive Income (Loss)

As of July 31, 2015 and 2014, pre-tax amounts recognized in accumulated other comprehensive income in the accompanying Consolidated Balance Sheets consist of:

	2015		2014
Net actuarial gain	$	6,655	$	7,960
Prior service credit	1,035		2,011
	$	7,690	$	9,971

Schedule of Net Periodic Benefit Cost Not yet Recognized

Net periodic benefit cost for the Plan for fiscal years 2015, 2014, and 2013 includes the following components:

	Years Ended July 31,
	2015			2014			2013
Net periodic postretirement benefit cost included the following components:
Service cost	$	210		$	674		$	770
Interest cost	222			534			476
Amortization of prior service credit	(1,169		)	(203		)	(203		)
Amortization of net actuarial gain	(804		)	(265		)	(47		)
Curtailment gain	(4,296		)	—			—
Periodic postretirement benefit cost	$	(5,837	)	$	740		$	996

Schedule of Assumptions Used

The following assumptions were used in accounting for the Plan:

	2015		2014		2013
Weighted average discount rate used in determining accumulated postretirement benefit obligation	3.00	%	3.50	%	4.00	%
Weighted average discount rate used in determining net periodic benefit cost	3.41	%	4.00	%	3.25	%
Assumed health care trend rate used to measure APBO at July 31	7.00	%	7.50	%	8.00	%
Rate to which cost trend rate is assumed to decline (the ultimate trend rate)	5.50	%	5.50	%	5.50	%
Fiscal year the ultimate trend rate is reached	2018		2018		2018

Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates

A one-percentage point change in assumed health care cost trend rates would have the following effects on the Plan:

	One-Percentage Point Increase		One-Percentage Point Decrease
Effect on future service and interest cost	$	2	$	(2	)
Effect on accumulated postretirement benefit obligation at July 31, 2015	8		(8		)

Schedule of Expected Benefit Payments

The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid during the years ending July 31:

2016	$	659
2017	614
2018	569
2019	508
2020	439
2021 through 2025	1,264