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Acquisitions (Details) - USD ($) | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020
Business Acquisition [Line Items] |  |
Payments to Acquire Businesses, Net of Cash Acquired | $ 88,457,000 | $ 238,839
Current Assets | 5,128,000 |
Property, Plant, and Equipment | 1,854,000 |
Goodwill - tax deductible |  | 33,159,000
Goodwill Acquired | 62,487,000 |
Intangibles | 38,914,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets | 415,000 |
Current Liabilities | 11,604,000 |
Goodwill and intangible assets | 101,401,000 |
Other assets and deferred charges | 8,737,000 |
Goodwill Acquired During Period, Non-deductible for Income Tax | 62,487,000 | 112,178,000
Patents [Member] |  |
Business Acquisition [Line Items] |  |
Intangibles | $ 6,006,000 |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 9 years |
Trademarks [Member] |  |
Business Acquisition [Line Items] |  |
Intangibles | $ 4,306,000 |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 15 years |
Customer-Related Intangible Assets |  |
Business Acquisition [Line Items] |  |
Intangibles | $ 18,892,000 |
Unpatented Technologies [Member] |  |
Business Acquisition [Line Items] |  |
Intangibles | 9,710,000 |
Systech [Member] |  |
Business Acquisition [Line Items] |  |
Payments to Acquire Businesses, Net of Cash Acquired |  | 162,943,000
Goodwill Acquired |  | 92,606,000
Intangibles |  | 76,100,000
Soft-Pak [Member] |  |
Business Acquisition [Line Items] |  |
Payments to Acquire Businesses, Net of Cash Acquired |  | 45,500,000
Goodwill - tax deductible |  | 33,159,000
Intangibles |  | 12,800,000
Em-tec [Member] |  |
Business Acquisition [Line Items] |  |
Payments to Acquire Businesses, Net of Cash Acquired |  | 30,396,000
Goodwill - tax deductible |  | 19,572,000
Intangibles |  | $ 8,344,000
Blue Bite |  |
Business Acquisition [Line Items] |  |
Payments to Acquire Businesses, Net of Cash Acquired | 29,035,000 |
Goodwill Acquired | 19,705,000 |
Intangibles | 13,250,000 |
Quantex |  |
Business Acquisition [Line Items] |  |
Payments to Acquire Businesses, Net of Cash Acquired | 23,896,000 |
Goodwill Acquired | 15,596,000 |
Intangibles | 11,034,000 |
AvaLAN |  |
Business Acquisition [Line Items] |  |
Payments to Acquire Businesses, Net of Cash Acquired | 34,003,000 |
Goodwill Acquired | 26,495,000 |
Intangibles | $ 14,630,000 |
Minimum [Member] | Customer-Related Intangible Assets |  |
Business Acquisition [Line Items] |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 12 years |
Minimum [Member] | Unpatented Technologies [Member] |  |
Business Acquisition [Line Items] |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 7 years |
Maximum [Member] | Customer-Related Intangible Assets |  |
Business Acquisition [Line Items] |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 15 years |
Maximum [Member] | Unpatented Technologies [Member] |  |
Business Acquisition [Line Items] |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 8 years |

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