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Allowance for Doubtful Accounts - Allowance for doubtful accounts (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Accounts receivable |  |
Accounts receivable, Allowance for doubtful accounts, beginning balance | $ 51,052 | $ 39,903
Write-Offs | (7,305) | (4,409)
Bad Debt Expense | 2,779 | 2,186
Accounts receivable, Allowance for doubtful accounts, ending balance | 46,526 | 74,389
Notes receivable |  |
Notes receivable, Allowance for doubtful accounts, beginning balance | 14,576 | 17,891
Write-Offs | (2,809) | 0
Bad Debt Expense | 636 | (126)
Notes receivable, Allowance for doubtful accounts, ending balance | 16,749 | 12,490
Allowance for doubtful accounts, beginning balance | 67,801 | 52,393
Write-Offs | (10,114) | (4,409)
Bad Debt Expense | 3,415 | 2,060
Allowance for doubtful accounts, ending balance | 61,102 | 92,280
Accounts receivable recovered after write off | 0 | 0
Cumulative effect of ASC 326 adoption |  |
Accounts receivable |  |
Accounts receivable, Allowance for doubtful accounts, beginning balance |  | 36,709
Notes receivable |  |
Notes receivable, Allowance for doubtful accounts, ending balance |  | 5,527
Allowance for doubtful accounts, beginning balance |  | 42,236
Standard notes receivable |  |
Notes receivable |  |
Notes receivable, Allowance for doubtful accounts, beginning balance | 12,993 | 11,654
Write-Offs | (9) | 0
Bad Debt Expense | (256) | (249)
Notes receivable, Allowance for doubtful accounts, ending balance | 13,258 | 6,667
Standard notes receivable | Cumulative effect of ASC 326 adoption |  |
Notes receivable |  |
Notes receivable, Allowance for doubtful accounts, ending balance |  | 5,236
Elevated risk notes receivable |  |
Notes receivable |  |
Notes receivable, Allowance for doubtful accounts, beginning balance | 1,583 | 6,237
Write-Offs | (2,800) | 0
Bad Debt Expense | 892 | 123
Notes receivable, Allowance for doubtful accounts, ending balance | $ 3,491 | 5,823
Elevated risk notes receivable | Cumulative effect of ASC 326 adoption |  |
Notes receivable |  |
Notes receivable, Allowance for doubtful accounts, ending balance |  | $ 291

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- Definition Accounts and Financing Receivable, Allowance for Credit Loss, Writeoff + References No definition available. + Details
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- Definition Accounts and Financing Receivable, Credit Loss Expense (Reversal) + References No definition available. + Details
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- Definition Amount of allowance for credit loss of accounts and financing receivables. Includes, but is not limited to, notes and loan receivable. + References Reference 1: 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 + 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 Amount of increase in allowance for credit loss on accounts receivable, from recovery. + 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 (e) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
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- Definition Amount of direct write-downs of accounts receivable charged against the allowance. + 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 (d) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
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