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Summary of Financial Information by Reportable Segment and Product Line (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Aug. 31, 2016 | Aug. 31, 2015 | Aug. 31, 2014
Segment Reporting Information [Line Items] |  |  |
Net sales | $ 1,149,410 | $ 1,249,254 | $ 1,399,862
Operating profit (loss) | (100,217) | 53,554 | 203,108
Depreciation and amortization | 47,777 | 53,239 | 60,635
Capital Expenditure | 20,209 | 22,516 | 41,857
Assets | 1,442,538 | 1,636,917 |
Integrated Solutions [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 44,985 | 47,294 | 52,962
Industrial Tools [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 314,832 | 355,170 | 360,940
Industrial |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 359,817 | 402,464 | 413,901
Operating profit (loss) | 79,773 | 105,652 | 120,250
Depreciation and amortization | 8,175 | 8,257 | 7,597
Capital Expenditure | 2,570 | 1,249 | 3,349
Assets | 308,222 | 293,738 |
Energy Maintenance & Integrity [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 278,881 | 246,357 | 267,500
Other Energy Solutions [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 113,849 | 165,518 | 194,869
Energy |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 392,731 | 411,875 | 462,368
Operating profit (loss) | (107,528) | (41,351) | 56,412
Depreciation and amortization | 21,944 | 26,532 | 33,983
Capital Expenditure | 9,355 | 11,864 | 26,787
Assets | 479,169 | 601,521 |
On-Highway [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 209,575 | 220,889 | 272,201
Agriculture, Off-Highway and Other [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 187,287 | 214,026 | 251,391
Engineered Solutions |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 396,862 | 434,915 | 523,592
Operating profit (loss) | (42,991) | 19,789 | 55,430
Depreciation and amortization | 15,910 | 16,652 | 17,602
Capital Expenditure | 5,974 | 8,472 | 8,763
Assets | 493,840 | 588,200 |
General Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating profit (loss) | (29,471) | (30,536) | (28,984)
Depreciation and amortization | 1,749 | 1,798 | 1,453
Capital Expenditure | 2,310 | 931 | $ 2,958
Assets | $ 161,307 | $ 153,458 |

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