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SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS (Details) - Summary of Valuation Allowance - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Valuation Allowance [Line Items] |  |  |
Balance | $ 41,759 | $ 31,552 | $ 28,562
Charged to Costs and Expenses | 36,989 | 43,482 | 56,345
Net Deductions and other | (32,074) | (33,275) | (53,355)
Balance | 46,674 | 41,759 | 31,552
SEC Schedule, 12-09, Allowance, Uncollectible Premium Receivable [Member] |  |  |
Valuation Allowance [Line Items] |  |  |
Balance | 3,394 | 2,149 | 10,940
Charged to Costs and Expenses | 1,619 | 864 | 9,586
Net Deductions and other | (447) | 381 | (18,377)
Balance | 4,566 | 3,394 | 2,149
SEC Schedule, 12-09, Allowance, Notes Receivable [Member] |  |  |
Valuation Allowance [Line Items] |  |  |
Balance | 38,365 | 29,403 | 17,622
Charged to Costs and Expenses | 35,370 | 42,618 | 46,759
Net Deductions and other | (31,627) | (33,656) | (34,978)
Balance | $ 42,108 | $ 38,365 | $ 29,403

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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- Definition Amount of decrease in valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column D)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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