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Properties And Equipment | 12 Months Ended
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Dec. 31, 2021
Properties And Equipment [Abstract] |
Properties And Equipment | 12. Properties and Equipment A summary of properties and equipment follows (in thousands): December 31, 2021 2020Land$ 11,348 $ 9,385Buildings and building improvements 122,762 117,419Transportation equipment 73,322 68,379Machinery and equipment 143,335 129,835Computer software 64,064 62,138Furniture and fixtures 78,979 78,507Projects under development 17,781 15,537Total properties and equipment 511,591 481,200Less accumulated depreciation (317,911) (293,380)Net properties and equipment$ 193,680 $ 187,820 The net book value of computer software at December 31, 2021 and 2020, was $9.0 million and $8.9 million, respectively. Depreciation expense for computer software was $5.8 million, $5.5 million and $4.6 million for the years ended December 31, 2021, 2020 and 2019, respectively.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=120429125&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916 + Details
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