Derivative Financial Instruments and Hedging Activities Gains (Losses) Included in Other Comprehensive Income on Derivatives Accounted for as Hedging Instruments, Net of Tax (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
May 31, 2017 |
May 31, 2016 |
May 31, 2017 |
May 31, 2016 |
|
Derivative Instruments, Gain (Loss) [Line Items] | ||||
Interest rate derivatives | $ 0 | $ 0 | $ 0 | $ (10,070) |