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General - Allowance for Credit Losses on Premium Receivables (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Premiums Receivable, Allowance for Doubtful Accounts [Roll Forward] |  |  |  |
Beginning balance | $ 10,000 | $ 1,199 | $ 1,445 | $ 1,458
Provision during the period for expected credit losses | 559 | 1,506 | 9,448 | 4,421
Write-off amounts during the period | (735) | (1,660) | (3,279) | (5,231)
Recoveries during the period of amounts previously written off | 176 | 268 | 531 | 665
Ending balance | 10,000 | 1,313 | 10,000 | 1,313
Cumulative Effect, Period Of Adoption, Adjustment [Member] |  |  |  |
Premiums Receivable, Allowance for Doubtful Accounts [Roll Forward] |  |  |  |
Beginning balance | 0 | 0 | 1,855 | 0
Cumulative Effect, Period Of Adoption, Adjusted Balance [Member] |  |  |  |
Premiums Receivable, Allowance for Doubtful Accounts [Roll Forward] |  |  |  |
Beginning balance | $ 10,000 | $ 1,199 | $ 3,300 | $ 1,458

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- Definition Premium Receivable, Allowance for Credit Loss, Writeoff + References No definition available. + Details
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- Definition Premiums Receivable, Allowance for Credit Loss [Roll Forward] + References No definition available. + Details
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- Definition Amount of expense (reversal of expense) for expected credit loss on premium receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 + Details
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- Definition The carrying value as of the balance sheet date of the estimated valuation allowance to reduce gross premiums receivable to net realizable value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(5)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5074-111524 + Details
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- Definition Amount of recoveries of premiums receivable that were previously written off as bad debts. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 + Details
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- Details
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