Derivatives Derivative effects on OCI (Tables)

12 Months Ended

Aug. 31, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block]

The following table presents the pretax gains (losses) recorded in other comprehensive income relating to cash flow hedges for the years ended August 31, 2017, 2016, and 2015:

	2017		2016			2015
	(Dollars in thousands)
Interest rate derivatives	$	—	$	(10,070	)	$	(4,078	)

The following table presents the pretax gains (losses) relating to cash flow hedges that were reclassified from accumulated other comprehensive loss into income for the years ended August 31, 2017, 2016, and 2015:

	Location of Gain (Loss)	2017			2016			2015
		(Dollars in thousands)
Interest rate derivatives	Interest expense	$	(1,742	)	$	(5,071	)	$	(792	)