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Schedule IV - Reinsurance | 12 Months Ended
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Dec. 31, 2017
Supplemental Schedule of Reinsurance Premiums for Insurance Companies [Abstract] |
Schedule IV - Reinsurance |
($ thousands) |  | Direct Amount |  | Assumed from Other Companies |  | Ceded to Other Companies |  | Net Amount |  | % of Amount Assumed to Net
2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Premiums earned: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accident and health insurance |  | $ | 24 |  |  | — |  |  | 24 |  |  | — |  |  | — |
Property and liability insurance |  | 2,647,464 |  |  | 25,831 |  |  | 382,268 |  |  | 2,291,027 |  |  | 1 | %
Total premiums earned |  | 2,647,488 |  |  | 25,831 |  |  | 382,292 |  |  | 2,291,027 |  |  | 1 | %
2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Premiums earned: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accident and health insurance |  | $ | 32 |  |  | — |  |  | — |  |  | 32 |  |  | — |
Property and liability insurance |  | 2,484,683 |  |  | 28,214 |  |  | 363,357 |  |  | 2,149,540 |  |  | 1 | %
Total premiums earned |  | 2,484,715 |  |  | 28,214 |  |  | 363,357 |  |  | 2,149,572 |  |  | 1 | %
2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Premiums earned: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accident and health insurance |  | $ | 37 |  |  | — |  |  | 37 |  |  | — |  |  | — |
Property and liability insurance |  | 2,330,230 |  |  | 23,209 |  |  | 363,530 |  |  | 1,989,909 |  |  | 1 | %
Total premiums earned |  | 2,330,267 |  |  | 23,209 |  |  | 363,567 |  |  | 1,989,909 |  |  | 1 | %
See accompanying Report of Independent Registered Public Accounting Firm in Item 8. "Financial Statements and Supplementary Data." of this Form 10-K.

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- Definition The entire disclosure for the supplemental schedule of reinsurance information. Reinsurance schedule includes, but is not limited to, the type of insurance, gross amount of premiums, premiums ceded to other entities, premiums assumed from other entities, net amount of premium revenue, and the percentage of the premiums assumed to net premium revenue. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 2 -Subparagraph (SX 210.12-17) -URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e574992-122915 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.7-05.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=6879921&loc=d3e569147-122900 + Details
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