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Business Segments - Financial information by segment (Details) $ in Thousands |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2023 USD ($) | Aug. 31, 2022 USD ($) | Sep. 30, 2023 USD ($) segment | Sep. 30, 2022 USD ($) | Sep. 30, 2021 USD ($)
Financial information for each of the Company's business segments |  |  |  |  |
Number of operating segments | segment |  |  | 3 |  |
Revenue: |  |  |  |  |
Revenue |  |  | $ 4,904,728 | $ 4,631,018 | $ 4,254,485
Gross profit: |  |  |  |  |
Gross profit |  |  | $ 1,028,608 | $ 939,810 | $ 946,975
Gross profit (as a percent) |  |  | 21.00% | 20.30% | 22.30%
Selling, general, and administrative expenses: |  |  |  |  |
Selling, general, and administrative expenses |  |  | $ 639,223 | $ 534,493 | $ 494,088
Selling, general, and administrative expense (as a percent) |  |  | 13.00% | 11.50% | 11.60%
Divestiture related charges |  |  | $ 883 | $ 0 | $ 0
Impairment charges | $ 2,900 |  |  |  |
Operating income/(loss): |  |  |  |  |
Operating income |  |  | $ 294,794 | $ 325,898 | $ 408,530
Operating income (as a percent) |  |  | 6.00% | 7.00% | 9.60%
Amortization of intangible assets |  |  | $ (94,591) | $ (90,465) | $ (44,357)
Divestiture related charges |  |  | 883 | 0 | 0
Gain on sale of land and building |  |  | 0 | 11,046 | 0
Depreciation and amortization: |  |  |  |  |
Depreciation and amortization |  |  | $ 54,725 | $ 42,330 | $ 46,361
Depreciation and amortization (as a percent) |  |  | 1.10% | 0.90% | 1.10%
Land and Building |  |  |  |  |
Operating income/(loss): |  |  |  |  |
Gain on sale of land and building |  | $ 11,000 |  |  |
Segment Reconciling Items |  |  |  |  |
Selling, general, and administrative expenses: |  |  |  |  |
Selling, general, and administrative expenses |  |  | $ 29,973 | $ (3,454) | $ 10,746
Divestiture related charges |  |  | 3,751 | 0 | 0
Operating income/(loss): |  |  |  |  |
Amortization of intangible assets |  |  | (94,591) | (90,465) | (44,357)
Divestiture related charges |  |  | 3,751 | 0 | 0
Gain on sale of land and building |  |  | 0 | 11,046 | 0
Other |  |  | (29,973) | 3,454 | (10,746)
Segment Reconciling Items | MOVEit |  |  |  |  |
Operating income/(loss): |  |  |  |  |
Other |  |  | (29,300) |  |
U.S. Federal Services | Operating Segments |  |  |  |  |
Revenue: |  |  |  |  |
Revenue |  |  | 2,403,606 | 2,259,744 | 1,893,284
Gross profit: |  |  |  |  |
Gross profit |  |  | $ 557,886 | $ 519,440 | $ 432,551
Gross profit (as a percent) |  |  | 23.20% | 23.00% | 22.80%
Selling, general, and administrative expenses: |  |  |  |  |
Selling, general, and administrative expenses |  |  | $ 308,197 | $ 284,509 | $ 243,485
Selling, general, and administrative expense (as a percent) |  |  | 12.80% | 12.60% | 12.90%
Operating income/(loss): |  |  |  |  |
Operating income |  |  | $ 249,689 | $ 234,931 | $ 189,066
Operating income (as a percent) |  |  | 10.40% | 10.40% | 10.00%
Depreciation and amortization: |  |  |  |  |
Depreciation and amortization |  |  | $ 18,336 | $ 12,332 | $ 12,986
Depreciation and amortization (as a percent) |  |  | 0.80% | 0.50% | 0.70%
U.S. Services | Operating Segments |  |  |  |  |
Revenue: |  |  |  |  |
Revenue |  |  | $ 1,812,069 | $ 1,607,612 | $ 1,662,110
Gross profit: |  |  |  |  |
Gross profit |  |  | $ 377,541 | $ 343,004 | $ 408,050
Gross profit (as a percent) |  |  | 20.80% | 21.30% | 24.60%
Selling, general, and administrative expenses: |  |  |  |  |
Selling, general, and administrative expenses |  |  | $ 194,991 | $ 160,902 | $ 153,609
Selling, general, and administrative expense (as a percent) |  |  | 10.80% | 10.00% | 9.20%
Operating income/(loss): |  |  |  |  |
Operating income |  |  | $ 182,550 | $ 182,102 | $ 254,441
Operating income (as a percent) |  |  | 10.10% | 11.30% | 15.30%
Depreciation and amortization: |  |  |  |  |
Depreciation and amortization |  |  | $ 22,674 | $ 16,528 | $ 20,350
Depreciation and amortization (as a percent) |  |  | 1.30% | 1.00% | 1.20%
Outside the U.S. | Operating Segments |  |  |  |  |
Revenue: |  |  |  |  |
Revenue |  |  | $ 689,053 | $ 763,662 | $ 699,091
Gross profit: |  |  |  |  |
Gross profit |  |  | $ 93,181 | $ 77,366 | $ 106,374
Gross profit (as a percent) |  |  | 13.50% | 10.10% | 15.20%
Selling, general, and administrative expenses: |  |  |  |  |
Selling, general, and administrative expenses |  |  | $ 102,311 | $ 92,536 | $ 86,248
Selling, general, and administrative expense (as a percent) |  |  | 14.80% | 12.10% | 12.30%
Operating income/(loss): |  |  |  |  |
Operating income |  |  | $ (9,130) | $ (15,170) | $ 20,126
Operating income (as a percent) |  |  | (1.30%) | (2.00%) | 2.90%
Depreciation and amortization: |  |  |  |  |
Depreciation and amortization |  |  | $ 13,715 | $ 13,470 | $ 13,025
Depreciation and amortization (as a percent) |  |  | 2.00% | 1.80% | 1.90%
Outside the U.S. | Segment Reconciling Items |  |  |  |  |
Selling, general, and administrative expenses: |  |  |  |  |
Divestiture related charges |  |  | $ (900) |  |
Operating income/(loss): |  |  |  |  |
Divestiture related charges |  |  | $ (900) |  |

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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 + Details
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- References No definition available. + Details
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