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Subsequent Events (Details) - USD ($)	Oct. 30, 2018	Dec. 31, 2018
Hurricane Michael 2018 | Scenario, Forecast
Subsequent Event [Line Items]
Estimate of possible loss		$ 100,000,000
State Farm Mutual Automobile Insurance Company | Subsequent Event | Private Placement
Subsequent Event [Line Items]
Investment Agreement, number of shares issued in transaction (in shares)	1,947,496
Investment Agreement, consideration received per transaction	$ 250,000,000

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- Definition

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+ References

No definition available.

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- Definition

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+ References

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- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

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-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
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-Paragraph 9
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-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=115931803&loc=d3e12021-110248

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

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