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.

No definition available.

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- Definition

Amount, after reinsurance, of paid claims and allocated claim adjustment expense used in claims development for short-duration insurance contracts. Excludes unallocated claim adjustment expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 4B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=65670685&loc=SL65671311-158438

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- Definition

Undiscounted amount, after reinsurance, of the liability for unpaid claims and allocated claim adjustment expense for short-duration insurance contracts. Excludes unallocated claim adjustment expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 4B
-URI http://asc.fasb.org/extlink&oid=65670685&loc=SL65671311-158438

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 4C
-URI http://asc.fasb.org/extlink&oid=65670685&loc=SL65671315-158438

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Losses and Loss Adjustment Expenses Incurred and Paid - Schedule of Cumulative Paid Losses and Loss Adjustment Expenses, Net of Reinsurance (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Claims Development [Line Items]
Cumulative paid losses and loss adjustment expenses, net of reinsurance	$ 1,618,142
Total outstanding reserves for unpaid losses and LAE, net of reinsurance	158,290
Accident Year 2008
Claims Development [Line Items]
Cumulative paid losses and loss adjustment expenses, net of reinsurance	177,159	$ 177,154	$ 176,907	$ 176,331	$ 175,700	$ 174,688	$ 172,768	$ 169,373	$ 160,366	$ 122,207
Accident Year 2009
Claims Development [Line Items]
Cumulative paid losses and loss adjustment expenses, net of reinsurance	142,700	142,654	142,441	142,294	141,399	139,436	135,701	127,355	$ 92,372
Accident Year 2010
Claims Development [Line Items]
Cumulative paid losses and loss adjustment expenses, net of reinsurance	133,981	133,896	133,648	132,989	131,878	128,843	120,301	$ 87,319
Accident Year 2011
Claims Development [Line Items]
Cumulative paid losses and loss adjustment expenses, net of reinsurance	125,541	125,383	125,012	123,888	120,790	113,199	$ 82,945
Accident Year 2012
Claims Development [Line Items]
Cumulative paid losses and loss adjustment expenses, net of reinsurance	140,554	139,781	137,968	133,397	123,869	$ 89,159
Accident Year 2013
Claims Development [Line Items]
Cumulative paid losses and loss adjustment expenses, net of reinsurance	143,481	141,444	134,931	124,021	$ 88,726
Accident Year 2014
Claims Development [Line Items]
Cumulative paid losses and loss adjustment expenses, net of reinsurance	167,973	162,702	144,943	$ 98,437
Accident Year 2015
Claims Development [Line Items]
Cumulative paid losses and loss adjustment expenses, net of reinsurance	227,388	208,533	$ 129,216
Accident Year 2016
Claims Development [Line Items]
Cumulative paid losses and loss adjustment expenses, net of reinsurance	238,657	$ 163,792
Accident Year 2017
Claims Development [Line Items]
Cumulative paid losses and loss adjustment expenses, net of reinsurance	$ 120,708