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v3.21.2

Segment Information (U.S. Government Related Sales by Segment) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019
Entity Wide Revenue Major Customer [Line Items] |  |  |
Net sales | $ 2,245,832 | $ 2,495,665 | $ 2,900,197
Aerospace [Member] |  |  |
Entity Wide Revenue Major Customer [Line Items] |  |  |
Net sales | 1,404,117 | 1,590,963 | 1,880,520
Industrial [Member] |  |  |
Entity Wide Revenue Major Customer [Line Items] |  |  |
Net sales | 841,715 | 904,702 | 1,019,677
Direct Sales to U.S. Government [Member] |  |  |
Entity Wide Revenue Major Customer [Line Items] |  |  |
Net sales | 124,564 | 155,283 | 122,825
Direct Sales to U.S. Government [Member] | Aerospace [Member] |  |  |
Entity Wide Revenue Major Customer [Line Items] |  |  |
Net sales | 116,832 | 149,416 | 118,334
Direct Sales to U.S. Government [Member] | Industrial [Member] |  |  |
Entity Wide Revenue Major Customer [Line Items] |  |  |
Net sales | $ 7,732 | $ 5,867 | $ 4,491
Direct Sales to U.S. Government [Member] | Sales [Member] | Product Concentration Risk [Member] |  |  |
Entity Wide Revenue Major Customer [Line Items] |  |  |
Percentage of attributable to revenue | 6.00% | 6.00% | 4.00%
Indirect Sales to U.S. Government [Member] |  |  |
Entity Wide Revenue Major Customer [Line Items] |  |  |
Net sales | $ 528,560 | $ 553,897 | $ 559,116
Indirect Sales to U.S. Government [Member] | Aerospace [Member] |  |  |
Entity Wide Revenue Major Customer [Line Items] |  |  |
Net sales | 526,118 | 536,424 | 545,306
Indirect Sales to U.S. Government [Member] | Industrial [Member] |  |  |
Entity Wide Revenue Major Customer [Line Items] |  |  |
Net sales | $ 2,442 | $ 17,473 | $ 13,810
Indirect Sales to U.S. Government [Member] | Sales [Member] | Product Concentration Risk [Member] |  |  |
Entity Wide Revenue Major Customer [Line Items] |  |  |
Percentage of attributable to revenue | 23.00% | 22.00% | 19.00%
U.S. Government Related [Member] |  |  |
Entity Wide Revenue Major Customer [Line Items] |  |  |
Net sales | $ 653,124 | $ 709,180 | $ 681,941
U.S. Government Related [Member] | Aerospace [Member] |  |  |
Entity Wide Revenue Major Customer [Line Items] |  |  |
Net sales | 642,950 | 685,840 | 663,640
U.S. Government Related [Member] | Industrial [Member] |  |  |
Entity Wide Revenue Major Customer [Line Items] |  |  |
Net sales | $ 10,174 | $ 23,340 | $ 18,301
U.S. Government Related [Member] | Sales [Member] | Product Concentration Risk [Member] |  |  |
Entity Wide Revenue Major Customer [Line Items] |  |  |
Percentage of attributable to revenue | 29.00% | 28.00% | 23.00%

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