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Supplemental Financial Statement Information - Schedule of Commissions Receivable (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Change in Contract with Customer, Asset [Roll Forward] |  |
Beginning balance | $ 792,405 | $ 589,222
Total revenue | 134,214 | 106,408
Cash receipts | (177,532) | (126,542)
Change in credit loss allowance | (78) | (1,632)
Ending balance | 741,847 | 560,717
Medicare |  |
Change in Contract with Customer, Asset [Roll Forward] |  |
Beginning balance | 739,637 | 550,922
Cash receipts | (165,520) | (112,731)
Change in credit loss allowance | (72) | (1,574)
Ending balance | 688,737 | 526,721
Individual, Family and Small Business |  |
Change in Contract with Customer, Asset [Roll Forward] |  |
Beginning balance | 52,768 | 38,300
Cash receipts | (12,012) | (13,811)
Change in credit loss allowance | (6) | (58)
Ending balance | 53,110 | 33,996
Commission revenue from members approved during the period |  |
Change in Contract with Customer, Asset [Roll Forward] |  |
Total revenue | 121,073 | 86,921
Commission revenue from members approved during the period | Medicare |  |
Change in Contract with Customer, Asset [Roll Forward] |  |
Total revenue | 114,678 | 81,125
Commission revenue from members approved during the period | Individual, Family and Small Business |  |
Change in Contract with Customer, Asset [Roll Forward] |  |
Total revenue | 6,395 | 5,796
Commission revenue from renewals of small business members during the period |  |
Change in Contract with Customer, Asset [Roll Forward] |  |
Total revenue | 2,687 | 2,396
Commission revenue from renewals of small business members during the period | Medicare |  |
Change in Contract with Customer, Asset [Roll Forward] |  |
Total revenue | 0 | 0
Commission revenue from renewals of small business members during the period | Individual, Family and Small Business |  |
Change in Contract with Customer, Asset [Roll Forward] |  |
Total revenue | 2,687 | 2,396
Net commission revenue adjustments from members approved in prior period |  |
Change in Contract with Customer, Asset [Roll Forward] |  |
Total revenue | 3,292 | 10,352
Net commission revenue adjustments from members approved in prior period | Medicare |  |
Change in Contract with Customer, Asset [Roll Forward] |  |
Total revenue | 14 | 8,979
Net commission revenue adjustments from members approved in prior period | Individual, Family and Small Business |  |
Change in Contract with Customer, Asset [Roll Forward] |  |
Total revenue | $ 3,278 | $ 1,373

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- Definition Amount of increase (decrease) in allowance for credit loss on right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130533-203044 + Details
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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
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