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Reinsurance (Tables) | 12 Months Ended
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Dec. 31, 2019
Reinsurance [Abstract] |
Premiums Written And Earned And Incurred Losses And LAE |
| Years Ended December 31,
(Dollars in thousands) | 2019 |  | 2018 |  | 2017
Written premiums: |  |  |  |  |  |  |  |
Direct | $ | 2,783,036 |  | $ | 2,240,951 |  | $ | 2,083,555
Assumed |  | 6,350,328 |  |  | 6,234,203 |  |  | 5,090,367
Ceded |  | (1,308,940) |  |  | (1,060,726) |  |  | (929,261)
Net written premiums | $ | 7,824,424 |  | $ | 7,414,428 |  | $ | 6,244,661
Premiums earned: |  |  |  |  |  |  |  |
Direct | $ | 2,551,662 |  | $ | 2,129,320 |  | $ | 1,825,705
Assumed |  | 6,059,222 |  |  | 5,807,332 |  |  | 4,945,522
Ceded |  | (1,207,198) |  |  | (1,004,953) |  |  | (833,387)
Net premiums earned | $ | 7,403,686 |  | $ | 6,931,699 |  | $ | 5,937,840
Incurred losses and LAE: |  |  |  |  |  |  |  |
Direct | $ | 1,618,686 |  | $ | 1,372,589 |  | $ | 1,311,682
Assumed |  | 3,923,298 |  |  | 5,046,947 |  |  | 3,909,816
Ceded |  | (619,086) |  |  | (768,133) |  |  | (698,917)
Net incurred losses and LAE | $ | 4,922,898 |  | $ | 5,651,403 |  | $ | 4,522,581

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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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