Employee Benefit Plans (Tables)

9 Months Ended

Apr. 30, 2015

Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

The components of net periodic postretirement benefit cost for the three and nine months ended April 30, 2015 and 2014 were as follows:

	Three months ended April 30,						Nine months ended April 30,
	2015			2014			2015			2014
Components of net periodic postretirement benefit cost:
Service cost	$	40		$	168		$	203		$	505
Interest cost	35			134			177			401
Amortization of prior service credit	(40		)	(51		)	(202		)	(152		)
Amortization of net actuarial gain	(106		)	(66		)	(540		)	(199		)
Curtailment gain	(4,296		)	—			(4,296		)	—
Net periodic postretirement benefit cost	$	(4,367	)	$	185		$	(4,658	)	$	555