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v3.19.3.a.u2

Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Allowance for obsolete inventory |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Period | $ 48,343 | $ 47,119 | $ 45,175
Additions Charged to Costs and Expenses | 21,930 | 11,565 | 36,150
Additions Through Acquisition | 454 | 1,947 | 0
Other Changes Add (Deduct) | (14,067) | (12,288) | (34,206)
Balance at End of Period | 56,660 | 48,343 | 47,119
Allowance for doubtful accounts receivable |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Period | 9,451 | 10,914 | 19,439
Additions Charged to Costs and Expenses | 767 | 1,058 | (965)
Additions Through Acquisition | 0 | 60 | 0
Other Changes Add (Deduct) | (878) | (2,581) | (7,560)
Balance at End of Period | $ 9,340 | $ 9,451 | $ 10,914

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- Definition Amount of increase (decrease) in valuation and qualifying accounts and reserves from adjustment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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