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Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands |  |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 17, 2018 | Jan. 02, 2018 | Mar. 31, 2017 | Feb. 16, 2017 | Feb. 01, 2017 | Jan. 03, 2017 | Oct. 31, 2019 | Oct. 31, 2018 | Oct. 31, 2017
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Acquisition of businesses, net of cash acquired |  |  |  |  |  |  | $ 12,486 | $ 50,586 | $ 805,943
Goodwill |  |  |  |  |  |  | 1,614,739 | 1,608,018 | 1,589,210
Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  | $ 1,203,278 | $ 1,194,969 | $ 1,172,857
2017 Acquisition [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Goodwill |  |  | $ 434,123 |  |  |  |  |  |
Customer Relationships [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Intangible assets amortization period |  |  |  |  |  |  | 14 years |  |
Trade Names [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Intangible assets amortization period |  |  |  |  |  |  | 15 years |  |
Non-compete Agreements [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Intangible assets amortization period |  |  |  |  |  |  | 3 years |  |
Cladach Nua Teoranta [Member] | 2018 Acquisition [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Acquired percent of the outstanding shares | 100.00% |  |  |  |  |  |  |  |
Acquisition of businesses, net of cash acquired | $ 5,236 |  |  |  |  |  |  |  |
Acquisition of business, earn-out liability | 1,131 |  |  |  |  |  |  |  |
Goodwill | 3,776 |  |  |  |  |  |  |  |
Identifiable intangible assets | 697 |  |  |  |  |  |  |  |
Cladach Nua Teoranta [Member] | Customer Relationships [Member] | 2018 Acquisition [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets | $ 58 |  |  |  |  |  |  |  |
Intangible assets amortization period | 6 years |  |  |  |  |  |  |  |
Cladach Nua Teoranta [Member] | Trade Names [Member] | 2018 Acquisition [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets | $ 70 |  |  |  |  |  |  |  |
Intangible assets amortization period | 9 years |  |  |  |  |  |  |  |
Cladach Nua Teoranta [Member] | Technology-Based Intangible Assets [Member] | 2018 Acquisition [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets | $ 499 |  |  |  |  |  |  |  |
Intangible assets amortization period | 7 years |  |  |  |  |  |  |  |
Cladach Nua Teoranta [Member] | Non-compete Agreements [Member] | 2018 Acquisition [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets | $ 70 |  |  |  |  |  |  |  |
Intangible assets amortization period | 3 years |  |  |  |  |  |  |  |
Sonoscan, Inc. [Member] | 2018 Acquisition [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Acquired percent of the outstanding shares |  | 100.00% |  |  |  |  |  |  |
Acquisition of businesses, net of cash acquired |  | $ 46,018 |  |  |  |  |  |  |
Goodwill |  | 22,775 |  |  |  |  |  |  |
Identifiable intangible assets |  | 7,910 |  |  |  |  |  |  |
Cash acquired from business acquisition |  | 655 |  |  |  |  |  |  |
Sonoscan, Inc. [Member] | Customer Relationships [Member] | 2018 Acquisition [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  | $ 1,700 |  |  |  |  |  |  |
Intangible assets amortization period |  | 7 years |  |  |  |  |  |  |
Sonoscan, Inc. [Member] | Trade Names [Member] | 2018 Acquisition [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  | $ 3,300 |  |  |  |  |  |  |
Intangible assets amortization period |  | 11 years |  |  |  |  |  |  |
Sonoscan, Inc. [Member] | Technology-Based Intangible Assets [Member] | 2018 Acquisition [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  | $ 2,500 |  |  |  |  |  |  |
Intangible assets amortization period |  | 7 years |  |  |  |  |  |  |
Sonoscan, Inc. [Member] | Non-compete Agreements [Member] | 2018 Acquisition [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  | $ 410 |  |  |  |  |  |  |
Intangible assets amortization period |  | 5 years |  |  |  |  |  |  |
Vention [Member] | 2017 Acquisition [Member] | Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Acquisition of businesses, net of cash acquired |  |  | 705,000 |  |  |  |  |  |
Goodwill |  |  | 434,123 |  |  |  |  |  |
Identifiable intangible assets |  |  | 286,000 |  |  |  |  |  |
Cash acquired from business acquisition |  |  | 3,313 |  |  |  |  |  |
Acquisition of businesses, Cash and other closing adjustments |  |  | 10,726 |  |  |  |  |  |
Business combination, goodwill, tax deductible amount |  |  | 37,200 |  |  |  |  |  |
Vention [Member] | Customer Relationships [Member] | 2017 Acquisition [Member] | Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  | $ 240,000 |  |  |  |  |  |
Intangible assets amortization period |  |  | 14 years |  |  |  |  |  |
Vention [Member] | Trade Names [Member] | 2017 Acquisition [Member] | Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  | $ 2,000 |  |  |  |  |  |
Intangible assets amortization period |  |  | 6 years |  |  |  |  |  |
Vention [Member] | Technology-Based Intangible Assets [Member] | 2017 Acquisition [Member] | Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  | $ 44,000 |  |  |  |  |  |
Vention [Member] | Technology-Based Intangible Assets Amortized over 14 Years [Member] | 2017 Acquisition [Member] | Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  | $ 36,000 |  |  |  |  |  |
Intangible assets amortization period |  |  | 14 years |  |  |  |  |  |
Vention [Member] | Technology-Based Intangible Assets Amortized over 10 Years [Member] | 2017 Acquisition [Member] | Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  | $ 8,000 |  |  |  |  |  |
Intangible assets amortization period |  |  | 10 years |  |  |  |  |  |
InterSelect GmbH [Member] | 2017 Acquisition [Member] | Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Acquired percent of the outstanding shares |  |  |  | 100.00% |  |  |  |  |
Goodwill |  |  |  | $ 3,548 |  |  |  |  |
Identifiable intangible assets |  |  |  | 1,879 |  |  |  |  |
Cash acquired from business acquisition |  |  |  | 492 |  |  |  |  |
Acquisition of businesses, net of cash acquired |  |  |  | 5,432 |  |  |  |  |
InterSelect GmbH [Member] | Customer Relationships [Member] | 2017 Acquisition [Member] | Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  | $ 1,109 |  |  |  |  |
Intangible assets amortization period |  |  |  | 9 years |  |  |  |  |
InterSelect GmbH [Member] | Trade Names [Member] | 2017 Acquisition [Member] | Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  | $ 348 |  |  |  |  |
Intangible assets amortization period |  |  |  | 12 years |  |  |  |  |
InterSelect GmbH [Member] | Technology-Based Intangible Assets [Member] | 2017 Acquisition [Member] | Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  | $ 422 |  |  |  |  |
Intangible assets amortization period |  |  |  | 9 years |  |  |  |  |
Plas-Pak Industries, Inc. [Member] | 2017 Acquisition [Member] | Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Acquired percent of the outstanding shares |  |  |  |  | 100.00% |  |  |  |
Acquisition of businesses, net of cash acquired |  |  |  |  | $ 70,798 |  |  |  |
Goodwill |  |  |  |  | 24,995 |  |  |  |
Identifiable intangible assets |  |  |  |  | 33,800 |  |  |  |
Cash acquired from business acquisition |  |  |  |  | 543 |  |  |  |
Plas-Pak Industries, Inc. [Member] | Customer Relationships [Member] | 2017 Acquisition [Member] | Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  |  | $ 23,700 |  |  |  |
Intangible assets amortization period |  |  |  |  | 17 years |  |  |  |
Plas-Pak Industries, Inc. [Member] | Trade Names [Member] | 2017 Acquisition [Member] | Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  |  | $ 4,100 |  |  |  |
Intangible assets amortization period |  |  |  |  | 12 years |  |  |  |
Plas-Pak Industries, Inc. [Member] | Technology-Based Intangible Assets [Member] | 2017 Acquisition [Member] | Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  |  | $ 5,000 |  |  |  |
Intangible assets amortization period |  |  |  |  | 9 years |  |  |  |
Plas-Pak Industries, Inc. [Member] | Non-compete Agreements [Member] | 2017 Acquisition [Member] | Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  |  | $ 1,000 |  |  |  |
Intangible assets amortization period |  |  |  |  | 5 years |  |  |  |
ACE Production Technologies Inc [Member] | 2017 Acquisition [Member] | Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | $ 6,383 |  |  |
Identifiable intangible assets |  |  |  |  |  | 5,010 |  |  |
Acquisition of businesses, net of cash acquired |  |  |  |  |  | 13,761 |  |  |
ACE Production Technologies Inc [Member] | Customer Relationships [Member] | 2017 Acquisition [Member] | Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  |  |  | $ 2,800 |  |  |
Intangible assets amortization period |  |  |  |  |  | 7 years |  |  |
ACE Production Technologies Inc [Member] | Trade Names [Member] | 2017 Acquisition [Member] | Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  |  |  | $ 1,000 |  |  |
Intangible assets amortization period |  |  |  |  |  | 11 years |  |  |
ACE Production Technologies Inc [Member] | Technology-Based Intangible Assets [Member] | 2017 Acquisition [Member] | Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  |  |  | $ 1,100 |  |  |
Intangible assets amortization period |  |  |  |  |  | 7 years |  |  |
ACE Production Technologies Inc [Member] | Non-compete Agreements [Member] | 2017 Acquisition [Member] | Advanced Technology Systems [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  |  |  | $ 110 |  |  |
Intangible assets amortization period |  |  |  |  |  | 3 years |  |  |

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