Pensions and Other Post-Retirement Benefits (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
May 31, 2016 |
May 31, 2015 |
May 31, 2016 |
May 31, 2015 |
|
| Components of net periodic benefit cost | ||||
| Service cost | $ 74 | $ 91 | $ 222 | $ 272 |
| Interest cost | 182 | 170 | 546 | 509 |
| Expected return on plan assets | (129) | (153) | (387) | (459) |
| Amortization of prior service cost | 1 | 1 | 3 | 3 |
| Amortization of accumulated loss | 143 | 167 | 429 | 502 |
| Settlement loss | 177 | 177 | ||
| Net periodic benefit cost | $ 271 | $ 453 | 813 | 1,004 |
| Employer contribution | $ 233 | $ 214 | ||