XML 67 R54.htm IDEA: XBRL DOCUMENT v3.21.1

GEOGRAPHICAL BREAKDOWN OF DIRECT WRITTEN PREMIUM (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Effects of Reinsurance [Line Items]
Direct premiums written	$ 202.5	$ 164.2
Texas
Effects of Reinsurance [Line Items]
Direct premiums written	43.0	34.3
Georgia
Effects of Reinsurance [Line Items]
Direct premiums written	19.0	18.2
Pennsylvania
Effects of Reinsurance [Line Items]
Direct premiums written	10.4	8.5
Louisiana
Effects of Reinsurance [Line Items]
Direct premiums written	10.3	6.8
Colorado
Effects of Reinsurance [Line Items]
Direct premiums written	8.9	4.0
Utah
Effects of Reinsurance [Line Items]
Direct premiums written	8.6	6.0
Nevada
Effects of Reinsurance [Line Items]
Direct premiums written	8.3	3.4
Missouri
Effects of Reinsurance [Line Items]
Direct premiums written	7.9	7.5
Kentucky
Effects of Reinsurance [Line Items]
Direct premiums written	7.5	11.5
Arizona
Effects of Reinsurance [Line Items]
Direct premiums written	7.3	8.5
All others states
Effects of Reinsurance [Line Items]
Direct premiums written	$ 71.3	$ 55.5
Geographic Concentration Risk | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	100.00%	100.00%
Geographic Concentration Risk | Texas | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	21.20%	20.90%
Geographic Concentration Risk | Georgia | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	9.40%	11.10%
Geographic Concentration Risk | Pennsylvania | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	5.10%	5.20%
Geographic Concentration Risk | Louisiana | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	5.10%	4.10%
Geographic Concentration Risk | Colorado | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	4.40%	2.40%
Geographic Concentration Risk | Utah | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	4.20%	3.70%
Geographic Concentration Risk | Nevada | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	4.10%	2.10%
Geographic Concentration Risk | Missouri | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	3.90%	4.60%
Geographic Concentration Risk | Kentucky | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	3.70%	7.00%
Geographic Concentration Risk | Arizona | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	3.60%	5.20%
Geographic Concentration Risk | All others states | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	35.30%	33.70%

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13531-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13537-108611

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount, before premiums ceded to other entities and premiums assumed by the entity, of premiums written.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 605
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547

+ Details

Name:	us-gaap_DirectPremiumsWritten
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_EffectsOfReinsuranceLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_StatementGeographicalAxis=stpr_TX
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=stpr_GA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=stpr_PA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=stpr_LA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=stpr_CO
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=stpr_UT
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=stpr_NV
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=stpr_MO
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=stpr_KY
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=stpr_AZ
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=root_AllOtherStatesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_GeographicConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=root_DirectWrittenPremiumsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: