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Schedule IV - Reinsurance (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Direct Premiums Written	$ (23,828)	$ (14,313)	$ (53,837)
Ceded Premiums Written	16,860	(2,104)	(8,772)
Assumed Premiums Written	0	0	0
Premiums Written, Net	$ (40,688)	$ (12,209)	$ (45,065)
Percentage of Amount Assumed to Net	0.00%	0.00%	0.00%

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Premiums Written Financial Guarantee Insurance Contracts Percentage Of Amount Assumed To Net

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Amount of written premiums assumed from other entities.

+ 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)(2)
-URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547

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Amount of written premiums ceded to other entities.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 605
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547

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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
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-URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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