XML 56 R31.htm IDEA: XBRL DOCUMENT v3.19.3

Segment Information (Tables)

9 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Reconciliation of operating results by reportable segment

The following tables present the Company's operating results by reportable segment:

	Three Months Ended September 30,
	2019												2018
	Property & Casualty				Other				Total				Property & Casualty				Other				Total
	(Amounts in millions)
Net premiums earned	$	907.9			$	7.1			$	915.0			$	850.5			$	7.6			$	858.1
Less:
Losses and loss adjustment expenses	677.3				3.6				680.9				610.2				3.9				614.1
Underwriting expenses	217.8				3.5				221.3				202.8				3.3				206.1
Underwriting gain	12.8				—				12.8				37.5				0.4				37.9
Investment income									36.4												38.2
Net realized investment gains (losses)									33.3												(3.9		)
Other income									2.6												2.4
Interest expense									(4.3		)										(4.3		)
Pre-tax income									$	80.8											$	70.3
Net income									$	69.3											$	58.6

	Nine Months Ended September 30,
	2019												2018
	Property & Casualty				Other				Total				Property & Casualty				Other				Total
	(Amounts in millions)
Net premiums earned	$	2,652.8			$	21.2			$	2,674.0			$	2,476.9			$	23.3			$	2,500.2
Less:
Losses and loss adjustment expenses	1,957.4				10.5				1,967.9				1,840.1				11.8				1,851.9
Underwriting expenses	643.8				10.4				654.2				604.0				10.9				614.9
Underwriting gain	51.6				0.3				51.9				32.8				0.6				33.4
Investment income									105.6												104.5
Net realized investment gains (losses)									197.7												(48.4		)
Other income									7.2												7.1
Interest expense									(12.8		)										(12.8		)
Pre-tax income									$	349.6											$	83.8
Net income									$	288.4											$	76.2

Schedule direct premiums attributable to segment

The following tables present the Company’s net premiums earned and direct premiums written by reportable segment and line of insurance business:

	Three Months Ended September 30,
	2019												2018
	Property & Casualty				Other				Total				Property & Casualty				Other				Total
	(Amounts in millions)
Private passenger automobile	$	698.2			$	—			$	698.2			$	659.6			$	—			$	659.6
Homeowners	133.5				—				133.5				120.0				—				120.0
Commercial automobile	53.5				—				53.5				48.7				—				48.7
Other	22.7				7.1				29.8				22.2				7.6				29.8
Net premiums earned	$	907.9			$	7.1			$	915.0			$	850.5			$	7.6			$	858.1
Private passenger automobile	$	743.9			$	—			$	743.9			$	695.1			$	—			$	695.1
Homeowners	162.9				—				162.9				140.7				—				140.7
Commercial automobile	55.2				—				55.2				50.3				—				50.3
Other	25.8				9.2				35.0				24.5				6.9				31.4
Direct premiums written	$	987.8			$	9.2			$	997.0			$	910.6			$	6.9			$	917.5

	Nine Months Ended September 30,
	2019												2018
	Property & Casualty				Other				Total				Property & Casualty				Other				Total
	(Amounts in millions)
Private passenger automobile	$	2,055.1			$	—			$	2,055.1			$	1,932.1			$	—			$	1,932.1
Homeowners	376.7				—				376.7				340.5				—				340.5
Commercial automobile	154.5				—				154.5				140.3				—				140.3
Other	66.5				21.2				87.7				64.0				23.3				87.3
Net premiums earned	$	2,652.8			$	21.2			$	2,674.0			$	2,476.9			$	23.3			$	2,500.2
Private passenger automobile	$	2,146.8			$	—			$	2,146.8			$	2,035.1			$	—			$	2,035.1
Homeowners	452.8				—				452.8				394.0				—				394.0
Commercial automobile	165.4				—				165.4				149.9				—				149.9
Other	76.2				24.0				100.2				73.6				20.5				94.1
Direct premiums written	$	2,841.2			$	24.0			$	2,865.2			$	2,652.6			$	20.5			$	2,673.1

X

- Definition

Disclosure of direct premium written by line of business.

+ References

No definition available.

+ Details

Name:	mcy_ScheduleDirectPremiumsAttributableToSegmentTableTextBlock
Namespace Prefix:	mcy_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the reconciliation of profit (loss) from reportable segments to the consolidated income (loss) before income tax expense (benefit) and discontinued operations. Includes, but is not limited to, reconciliation after income tax if income tax is allocated to the reportable segment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8924-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8906-108599

+ Details

Name:	us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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