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Reinsurance (Tables) | 12 Months Ended
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Dec. 31, 2019
Reinsurance |
Schedule of reinsurance recoverable | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2018 |  | 2019
Reinsurance recoverable on paid losses | ​ | $ | 0.5 | ​ | $ | 1.8
Ceded unpaid loss and LAE | ​ |  | 11.3 | ​ |  | 18.5
Total reinsurance recoverable | ​ | $ | 11.8 | ​ | $ | 20.3
Schedule of unsecured reinsurance recoverable balances from reinsurers | balances from reinsurers at December 31, 2018 and 2019 with all but one having an A.M. Best rating of A (Excellent) or better ($ in millions): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Year Ended
AM Best | ​ | ​ | ​ | December 31,
Rating | ​ | Reinsurer | ​ | 2018 | ​ | 2019
A+ |  | Hannover Rueck SE |  | $ | 1.5 |  | $ | 2.3
A+ |  | Munich Reinsurance America Inc | ​ |  | 1.1 | ​ |  | 1.7
A |  | Lloyd’s Underwriter Syndicate no. 0033 HIS | ​ |  | 1.1 | ​ |  | 1.7
A |  | Lloyd’s Underwriter Syndicate no. 2357 NCL | ​ |  | 1.1 | ​ |  | 1.7
A |  | Hiscox Insurance Company (Bermuda) Ltd | ​ |  | 1.0 | ​ |  | 1.3
NR |  | Lloyd’s Underwriter Syndicate no. 2001 AML | ​ |  | 0.9 | ​ |  | 1.3
​ | ​ | ​ | ​ |  | 6.7 | ​ |  | 10.0
​ |  | Other reinsurers | ​ |  | 2.7 | ​ |  | 4.5
​ | ​ | ​ | ​ | $ | 9.4 | ​ | $ | 14.5
Schedule of premium written, earned and losses and LAE incurred | The impact of reinsurance treaties on the Company’s consolidated financial statements is as follows ($ in millions): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2018 |  | 2019
Premium written: |  | ​ |  |  | ​ |
Direct | ​ | $ | 46.8 | ​ | $ | 115.8
Ceded | ​ |  | (5.6) | ​ |  | (11.2)
Net premium written | ​ | $ | 41.2 | ​ | $ | 104.6
Premium earned: | ​ |  |  | ​ |  |
Direct | ​ | $ | 25.3 | ​ | $ | 75.5
Ceded | ​ |  | (4.1) | ​ |  | (11.7)
Net premium earned | ​ | $ | 21.2 | ​ | $ | 63.8
Losses and LAE incurred: | ​ |  |  | ​ |  |
Direct | ​ | $ | 28.6 | ​ | $ | 59.7
Ceded | ​ |  | (13.4) | ​ |  | (13.9)
Net losses and LAE incurred | ​ | $ | 15.2 | ​ | $ | 45.8

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- Definition Tabular disclosure of the effects of reinsurance, for example, but not limited to, disclosure of direct, assumed, and ceded insurance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 + Details
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- Definition Tabular disclosure of reinsurer or group of reinsurers for whom the entity has a concentration of credit risk. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 825 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=99380617&loc=SL75241803-196195 + Details
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