Income Taxes - Deferred Income Tax Effects of Temporary Differences (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred income tax assets:
Unearned premiums	$ 15,835	$ 10,976
Advanced premiums	1,332	1,742
Unpaid losses and LAE	1,654	2,598
Regulatory assessments	111	345
Share-based compensation	520	1,459
Accrued wages	539	255
Allowance for uncollectible receivables	138	172
Additional tax basis of securities	53us-gaap_DeferredTaxAssetsInvestments	45us-gaap_DeferredTaxAssetsInvestments
Capital loss carryforwards	918	1,149
Other comprehensive income	1,152
Total deferred income tax assets	22,252us-gaap_DeferredTaxAssetsGross	18,741us-gaap_DeferredTaxAssetsGross
Deferred income tax liabilities:
Deferred policy acquisition costs, net	(9,898)	(6,133)
Prepaid expenses	(504)	(548)
Other comprehensive income		(9)
Total deferred income tax liabilities	(10,402)us-gaap_DeferredIncomeTaxLiabilities	(6,690)us-gaap_DeferredIncomeTaxLiabilities
Net deferred income tax asset	$ 11,850us-gaap_DeferredTaxAssetsLiabilitiesNet	$ 12,051us-gaap_DeferredTaxAssetsLiabilitiesNet

Amount of deferred tax liability attributable to taxable temporary differences.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Deferred Tax Liability

-URI http://asc.fasb.org/extlink&oid=6510232

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph b(2)

-Article 7