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Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands |  |  |  |  | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2017 | Feb. 16, 2017 | Feb. 02, 2017 | Jan. 03, 2017 | Apr. 30, 2017 | Apr. 30, 2016 | Apr. 30, 2017 | Apr. 30, 2016 | Feb. 01, 2017 | Oct. 31, 2016 | Sep. 01, 2016
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Acquisition of businesses, net of cash acquired |  |  |  |  |  |  | $ 805,218 |  |  |  |
Goodwill | $ 465,544 |  |  |  | $ 1,606,345 |  | 1,606,345 |  |  | $ 1,107,137 |
Sales |  |  |  |  | 496,137 | $ 437,592 | 903,607 | $ 809,812 |  |  |
Net income |  |  |  |  | 64,523 | 70,601 | 114,511 | 111,762 |  |  |
Selling and administrative expenses |  |  |  |  | 171,981 | $ 146,501 | 321,201 | $ 291,430 |  |  |
Term loan facility |  |  |  |  | 1,712,274 |  | 1,712,274 |  |  |  |
Term Loan Facility [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Term loan facility | 705,000 |  |  |  |  |  |  |  |  |  |
Term loan facility due in October 2018 |  |  |  |  | 200,000 |  | 200,000 |  |  |  |
Term loan facility due in March 2020 |  |  |  |  | 200,000 |  | 200,000 |  |  |  |
Term loan facility due in March 2022 |  |  |  |  | $ 305,000 |  | $ 305,000 |  |  |  |
Weighted average interest rate for borrowings |  |  |  |  | 2.25% |  | 2.25% |  |  |  |
Vention [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  | $ 12,904 |  |  |  |  |  |
Net income |  |  |  |  | 440 |  |  |  |  |  |
Selling and administrative expenses |  |  |  |  | 13,415 |  |  |  |  |  |
Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  | $ 1,197,377 |  | $ 1,197,377 |  |  | $ 697,346 |
Advanced Technology Systems [Member] | Vention [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Acquisition of businesses, net of cash acquired | 705,000 |  |  |  |  |  |  |  |  |  |
Cash acquired from business acquisition | 3,313 |  |  |  |  |  |  |  |  |  |
Acquisition of businesses, Cash and other closing adjustments | 10,141 |  |  |  |  |  |  |  |  |  |
Goodwill | 465,544 |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets | 285,000 |  |  |  |  |  |  |  |  |  |
Advanced Technology Systems [Member] | Vention [Member] | Customer Relationships [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets | $ 250,000 |  |  |  |  |  |  |  |  |  |
Intangible assets amortization period | 14 years |  |  |  |  |  |  |  |  |  |
Advanced Technology Systems [Member] | Vention [Member] | Trade Names [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets | $ 2,000 |  |  |  |  |  |  |  |  |  |
Intangible assets amortization period | 6 years |  |  |  |  |  |  |  |  |  |
Advanced Technology Systems [Member] | Vention [Member] | Technology-Based Intangible Assets [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets | $ 33,000 |  |  |  |  |  |  |  |  |  |
Advanced Technology Systems [Member] | Vention [Member] | Technology-Based Intangible Assets Amortized over 14 Years [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets | $ 25,000 |  |  |  |  |  |  |  |  |  |
Intangible assets amortization period | 14 years |  |  |  |  |  |  |  |  |  |
Advanced Technology Systems [Member] | Vention [Member] | Technology-Based Intangible Assets Amortized over 10 Years [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets | $ 8,000 |  |  |  |  |  |  |  |  |  |
Intangible assets amortization period | 10 years |  |  |  |  |  |  |  |  |  |
Advanced Technology Systems [Member] | InterSelect GmbH [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cash acquired from business acquisition |  | $ 492 |  |  |  |  |  |  |  |  |
Goodwill |  | 2,943 |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  | $ 1,879 |  |  |  |  |  |  |  |  |
Acquired percent of the outstanding shares |  | 100.00% |  |  |  |  |  |  |  |  |
Acquisition of businesses, net of cash acquired |  | $ 5,518 |  |  |  |  |  |  |  |  |
Advanced Technology Systems [Member] | InterSelect GmbH [Member] | Customer Relationships [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  | $ 1,109 |  |  |  |  |  |  |  |  |
Intangible assets amortization period |  | 9 years |  |  |  |  |  |  |  |  |
Advanced Technology Systems [Member] | InterSelect GmbH [Member] | Trade Names [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  | $ 348 |  |  |  |  |  |  |  |  |
Intangible assets amortization period |  | 12 years |  |  |  |  |  |  |  |  |
Advanced Technology Systems [Member] | InterSelect GmbH [Member] | Technology-Based Intangible Assets [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  | $ 422 |  |  |  |  |  |  |  |  |
Intangible assets amortization period |  | 9 years |  |  |  |  |  |  |  |  |
Advanced Technology Systems [Member] | Plas-Pak Industries, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Acquisition of businesses, net of cash acquired |  |  | $ 70,798 |  |  |  |  |  |  |  |
Cash acquired from business acquisition |  |  | $ 543 |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  | $ 24,952 |  |
Identifiable intangible assets |  |  |  |  |  |  |  |  | $ 33,800 |  |
Acquired percent of the outstanding shares |  |  |  |  |  |  |  |  | 100.00% |  |
Advanced Technology Systems [Member] | Plas-Pak Industries, Inc. [Member] | Customer Relationships [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  |  |  |  |  |  | $ 23,700 |  |
Intangible assets amortization period |  |  | 17 years |  |  |  |  |  |  |  |
Advanced Technology Systems [Member] | Plas-Pak Industries, Inc. [Member] | Trade Names [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  |  |  |  |  |  | 4,100 |  |
Intangible assets amortization period |  |  | 12 years |  |  |  |  |  |  |  |
Advanced Technology Systems [Member] | Plas-Pak Industries, Inc. [Member] | Technology-Based Intangible Assets [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  |  |  |  |  |  | 5,000 |  |
Intangible assets amortization period |  |  | 9 years |  |  |  |  |  |  |  |
Advanced Technology Systems [Member] | Plas-Pak Industries, Inc. [Member] | Non-compete Agreements [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  |  |  |  |  |  | $ 1,000 |  |
Intangible assets amortization period |  |  | 5 years |  |  |  |  |  |  |  |
Advanced Technology Systems [Member] | ACE Production Technologies Inc [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  | $ 6,383 |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  | 5,010 |  |  |  |  |  |  |
Acquisition of businesses, net of cash acquired |  |  |  | 13,761 |  |  |  |  |  |  |
Advanced Technology Systems [Member] | ACE Production Technologies Inc [Member] | Customer Relationships [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  | $ 2,800 |  |  |  |  |  |  |
Intangible assets amortization period |  |  |  | 7 years |  |  |  |  |  |  |
Advanced Technology Systems [Member] | ACE Production Technologies Inc [Member] | Trade Names [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  | $ 1,000 |  |  |  |  |  |  |
Intangible assets amortization period |  |  |  | 11 years |  |  |  |  |  |  |
Advanced Technology Systems [Member] | ACE Production Technologies Inc [Member] | Technology-Based Intangible Assets [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  | $ 1,100 |  |  |  |  |  |  |
Intangible assets amortization period |  |  |  | 7 years |  |  |  |  |  |  |
Advanced Technology Systems [Member] | ACE Production Technologies Inc [Member] | Non-compete Agreements [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  | $ 110 |  |  |  |  |  |  |
Intangible assets amortization period |  |  |  | 3 years |  |  |  |  |  |  |
Advanced Technology Systems [Member] | LinkTech Quick Couplings Inc [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Acquired percent of the outstanding shares |  |  |  |  |  |  |  |  |  |  | 100.00%

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