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Allowance for Credit Losses on Premiums Receivable (Tables) | 12 Months Ended
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Dec. 31, 2020
Receivables [Abstract] |
Premium Receivable, Allowance for Credit Loss |
($ in thousands) |  |  |  | December 31, 2020
Balance at beginning of year |  |  |  | $ | 6,400 |
Cumulative effect adjustment 1 |  |  |  | 1,058 |
Balance at beginning of year, as adjusted |  |  |  | $ | 7,458 |
Current period provision for expected credit losses |  |  |  | 16,751 |
Write-offs charged against the allowance for credit losses |  |  |  | (3,754) |
Recoveries |  |  |  | 545 |
ACL, end of year |  |  |  | $ | 21,000 |

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- Definition Tabular disclosure of allowance for 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 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
Name: | us-gaap_PremiumReceivableAllowanceForCreditLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration