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Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Changes in allowance for doubtful accounts |  |  |  |  |  |
Balance at beginning of year | $ 916 | $ 951 | $ 1,041 |  |  |
Provision charged to expense | 5,016 | 609 | 841 |  |  |
Accounts written off, net of recoveries | 616 | 644 | 931 |  |  |
Balance at end of year | 5,316 | 916 | 951 |  |  |
Components of allowance for doubtful accounts |  |  |  |  |  |
Allowance for doubtful accounts related to accounts receivable-customer |  |  |  | $ 5,263 | $ 857 | $ 892
Allowance for doubtful accounts related to other accounts receivable |  |  |  | 53 | 59 | 59
Total allowance for doubtful accounts | 916 | 916 | 1,041 | 5,316 | 916 | 951
GSWC |  |  |  |  |  |
Changes in allowance for doubtful accounts |  |  |  |  |  |
Balance at beginning of year | 916 | 951 | 865 |  |  |
Provision charged to expense | 4,703 | 607 | 850 |  |  |
Provision for Doubtful Accounts transfer to BVESI | (79) | 0 | 0 |  |  |
Accounts written off, net of recoveries | 580 | 642 | 764 |  |  |
Balance at end of year | 4,960 | 916 | 951 |  |  |
Components of allowance for doubtful accounts |  |  |  |  |  |
Allowance for doubtful accounts related to accounts receivable-customer |  |  |  | 4,907 | 857 | 892
Allowance for doubtful accounts related to other accounts receivable |  |  |  | 53 | 59 | 59
Total allowance for doubtful accounts | $ 4,960 | $ 951 | $ 951 | $ 4,960 | $ 916 | $ 951

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- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
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- Definition Represents the amount of direct write-downs of receivables, net of recoveries, charged against the allowance for doubtful accounts. + References No definition available. + Details
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- Definition Represents the provision for doubtful accounts related to other accounts receivable. + References No definition available. + Details
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- Definition Represents the provision for doubtful accounts related to accounts receivable from customers. + References No definition available. + Details
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- Definition Amount of the current period expense charged against continuing operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected). + References No definition available. + Details
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- Definition Provision for Doubtful Accounts transfer to BVESI + References No definition available. + Details
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- Definition Amount of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121599878&loc=SL82895884-210446 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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