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Summary of Significant Accounting Policies (Goodwill by Reporting Segment) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 25, 2020
Segment Reporting Information |  |
Write-downs of long-lived assets | $ 0 |
Goodwill Roll Forward |  |
Beginning balance | 347,603,000 | $ 307,663,000
Additions, adjustments from business acquisitions | 13,321,000 | 29,657,000
Foreign currency translation | (4,669,000) | 10,283,000
Ending balance | 356,255,000 | 347,603,000
Industrial |  |
Goodwill Roll Forward |  |
Beginning balance | 186,536,000 | 177,112,000
Additions, adjustments from business acquisitions | 13,321,000 | 0
Foreign currency translation | (4,460,000) | 9,424,000
Ending balance | 195,397,000 | 186,536,000
Process |  |
Goodwill Roll Forward |  |
Beginning balance | 141,513,000 | 110,997,000
Additions, adjustments from business acquisitions | 0 | 29,657,000
Foreign currency translation | (209,000) | 859,000
Ending balance | 141,304,000 | 141,513,000
Contractor |  |
Goodwill Roll Forward |  |
Beginning balance | 19,554,000 | 19,554,000
Additions, adjustments from business acquisitions | 0 | 0
Foreign currency translation | 0 | 0
Ending balance | $ 19,554,000 | $ 19,554,000

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
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