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Concentration of Risk and Segment Data - Segment Revenue and Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Feb. 28, 2019 | Feb. 28, 2018 | Feb. 28, 2019 | Feb. 28, 2018
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Net revenue | $ 6,066,990 | $ 5,301,101 | $ 12,573,265 | $ 10,886,633
Reconciling items: |  |  |  |
Amortization of intangibles | (7,777) | (9,890) | (15,423) | (19,869)
Stock-based compensation expense and related charges | (15,697) | (15,039) | (32,946) | (67,784)
Restructuring and related charges | (817) | (5,427) | (6,842) | (16,815)
Other expense | (11,757) | (10,485) | (25,307) | (16,367)
Interest income | 4,760 | 5,011 | 9,139 | 8,824
Interest expense | (46,160) | (37,796) | (88,812) | (74,042)
Income before income tax | 100,826 | 86,262 | 265,713 | 193,701
Cayey, Puerto Rico |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Insurance recoveries |  | 6,100 | 2,900 | 16,400
EMS |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Net revenue | 3,804,727 |  | 7,307,830 |
Reconciling items: |  |  |  |
Restructuring and related charges | (300) | (2,100) | (4,700) | (8,000)
DMS |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Net revenue | 2,262,263 |  | 5,265,435 |
Reconciling items: |  |  |  |
Restructuring and related charges | (500) | (3,300) | (2,100) | (7,900)
Operating Segments |  |  |  |
Reconciling items: |  |  |  |
Income before income tax | 191,059 | 178,596 | 444,719 | 405,816
Operating Segments | EMS |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Net revenue | 3,804,727 | 2,870,488 | 7,307,830 | 5,732,548
Reconciling items: |  |  |  |
Income before income tax | 88,654 | 95,283 | 172,749 | 180,993
Operating Segments | DMS |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Net revenue | 2,262,263 | 2,430,613 | 5,265,435 | 5,154,085
Reconciling items: |  |  |  |
Income before income tax | 102,405 | 83,313 | 271,970 | 224,823
Segment Reconciling Items |  |  |  |
Reconciling items: |  |  |  |
Distressed Customer Charges | 0 | 14,706 | 0 | 14,706
Stock-based compensation expense and related charges | (15,697) | (15,039) | (32,946) | (67,784)
Acquisition and integration charges | (12,785) | 0 | (21,675) | 0
Business interruption and impairment charges, net(1) | $ 0 | $ (4,002) | $ 2,860 | $ (11,356)

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