HCI (HCI) 10-Q 7 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 28, 2013
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-13	'
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'
Entity Registrant Name	'HCI Group, Inc.	'
Entity Central Index Key	'0001400810	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	11,494,694

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Assets	'	'
Fixed-maturity securities, available-for-sale, at fair value	$62,093	$35,953
Equity securities, available-for-sale, at fair value	11,971	8,876
Other investments	16,458	16,087
Total investments	90,522	60,916
Cash and cash equivalents	273,878	230,214
Accrued interest and dividends receivable	572	375
Premiums and reinsurance receivable	24,600	10,642
Prepaid reinsurance premiums	32,535	9,112
Deferred policy acquisition costs	18,872	10,032
Property and equipment, net	13,163	10,853
Deferred income taxes	5,664	3,848
Other assets	8,548	2,296
Total assets	468,354	338,288
Liabilities and Stockholders' Equity	'	'
Losses and loss adjustment expenses	43,524	41,168
Unearned premiums	188,120	154,249
Advance premiums	9,628	4,029
Assumed reinsurance balances payable	586	1,377
Accrued expenses	9,665	3,041
Dividends payable	26	42
Income taxes payable	1,260	8,813
Long-term debt	40,250	'
Other liabilities	8,762	4,316
Total liabilities	301,821	217,035
Stockholders' equity:	'	'
Preferred stock	'	'
Common stock, (no par value, 40,000,000 shares authorized, 11,476,835 and 10,877,537 shares issued and outstanding in 2013 and 2012, respectively)	'	'
Additional paid-in capital	67,292	63,875
Retained income	98,070	55,758
Accumulated other comprehensive income	1,171	1,620
Total stockholders' equity	166,533	121,253
Total liabilities and stockholders' equity	468,354	338,288
7% Series A Cumulative Convertible Preferred Stock [Member]	'	'
Stockholders' equity:	'	'
Preferred stock	'	'

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Preferred stock, no par value	'	'
Preferred stock, authorized	18,500,000	18,500,000
Preferred stock, issued	0	0
Preferred stock, outstanding	0	0
Common stock, no par value	'	'
Common stock, authorized	40,000,000	40,000,000
Common stock, issued	11,476,835	10,877,537
Common stock, outstanding	11,476,835	10,877,537
7% Series A Cumulative Convertible Preferred Stock [Member]	'	'
Preferred stock, liquidation preference, per share	$10	$10
Preferred stock, no par value	'	'
Preferred stock, authorized	1,500,000	1,500,000
Preferred stock, issued	149,919	241,182
Preferred stock, outstanding	149,919	241,182

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenue	'	'	'	'
Gross premiums earned	$81,244	$53,109	$245,743	$161,579
Premiums ceded	-28,310	-22,506	-74,923	-53,475
Net premiums earned	52,934	30,603	170,820	108,104
Net investment income	380	47	814	871
Policy fee income	815	624	3,013	2,167
Net realized investment gains (losses)	31	-4	43	26
Gain on bargain purchase	'	'	'	179
Other	532	211	1,146	641
Total revenue	54,692	31,481	175,836	111,988
Expenses	'	'	'	'
Losses and loss adjustment expenses	14,489	15,017	47,775	50,382
Policy acquisition and other underwriting expenses	8,887	6,611	22,163	19,690
Interest expense	847	'	2,379	'
Other operating expenses	8,825	4,728	22,298	13,401
Total expenses	33,048	26,356	94,615	83,473
Income before income taxes	21,644	5,125	81,221	28,515
Income taxes	8,266	2,299	31,221	11,459
Net income	13,378	2,826	50,000	17,056
Preferred stock dividends	-22	-42	-88	-286
Income available to common stockholders	$13,356	$2,784	$49,912	$16,770
Basic earnings per common share	$1.17	$0.30	$4.46	$2.08
Diluted earnings per common share	$1.13	$0.27	$4.32	$1.79
Dividends per common share	$0.22	$0.20	$0.68	$0.55

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement Of Income And Comprehensive Income [Abstract]	'	'	'	'
Net income	$13,378	$2,826	$50,000	$17,056
Change in unrealized gain on investments:	'	'	'	'
Unrealized gain (loss) arising during the period	439	1,223	-744	2,672
Call and repayment losses charged to investment income	3	'	21	'
Reclassification adjustment for realized (loss) gain	-31	4	-43	-26
Net change in unrealized gain	411	1,227	-766	2,646
Deferred income taxes on above change	-137	-474	317	-1,021
Total other comprehensive income (loss)	274	753	-449	1,625
Comprehensive income	$13,652	$3,579	$49,551	$18,681

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:	'	'
Net income	$50,000	$17,056
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Stock-based compensation	3,418	522
Net amortization of discounts and premiums on investments in fixed-maturity securities	191	222
Depreciation and amortization	1,482	1,023
Deferred income taxes	-1,499	2,324
Net realized investment gains	-43	-26
Gain on bargain purchase	'	-179
Loss on sale of other investments	2	'
Foreign currency remeasurement loss	72	'
Changes in operating assets and liabilities:	'	'
Premiums and reinsurance receivable	-13,958	-3,590
Advance premiums	5,599	4,570
Prepaid reinsurance premiums	-23,423	-7,612
Accrued interest and dividends receivable	-197	74
Income taxes receivable	'	-1,495
Other assets	-5,091	-149
Assumed reinsurance balances payable	-791	1,329
Deferred policy acquisition costs	-8,840	-227
Losses and loss adjustment expenses	2,356	11,302
Unearned premiums	33,871	12,168
Income taxes payable	-7,553	-4,956
Accrued expenses and other liabilities	11,024	4,966
Net cash provided by operating activities	46,620	37,322
Cash flows from investing activities:	'	'
Cash consideration paid for acquired business, net of cash acquired	'	-8,157
Purchase of property and equipment, net	-3,107	-952
Purchase of other investments	-666	-1,119
Purchase of fixed-maturity securities	-31,309	-9,601
Purchase of equity securities	-5,144	-6,018
Proceeds from sales of fixed-maturity securities	1,749	4,936
Proceeds from calls, repayments and maturities of fixed-maturity securities	2,534	'
Proceeds from sales of equity securities	2,021	2,063
Decrease in time deposits, net	'	5,160
Net cash used in investing activities	-33,922	-13,688
Cash flows from financing activities:	'	'
Net proceeds from the issuance of common stock	'	20,082
Proceeds from the exercise of common stock warrants	'	2,524
Proceeds from the issuance of long-term debt	40,250	'
Cash dividends paid	-7,704	-5,118
Repurchase of common stock	-893	'
Debt issuance costs	-1,525	'
Tax benefits related to stock-based compensation	892	445
Net cash provided by financing activities	31,020	17,933
Effect of exchange rate changes on cash	-54	'
Net increase in cash and cash equivalents	43,664	41,567
Cash and cash equivalents at beginning of period	230,214	100,355
Cash and cash equivalents at end of period	273,878	141,922
Supplemental disclosure of cash flow information:	'	'
Cash paid for income taxes	39,335	15,140
Cash paid for interest	1,726	'
Non-cash investing and financing activities:	'	'
Unrealized (loss) gain on investments in available-for-sale securities, net of tax	-449	1,625
Series A Preferred Stock [Member]	'	'
Non-cash investing and financing activities:	'	'
Conversion of Series A Preferred Stock to common stock	$814	$8,302

Consolidated_Statement_of_Stoc

Consolidated Statement of Stockholders' Equity (USD $)	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Income [Member]	Accumulated Other Comprehensive Income [Member]
In Thousands, except Share data	USD ($)			USD ($)	USD ($)	USD ($)
Beginning Balance at Dec. 31, 2011	$63,830	'	'	$29,636	$33,986	$208
Beginning Balance, shares at Dec. 31, 2011	'	1,247,700	6,202,485	'	'	'
Net income	17,056	'	'	'	17,056	'
Change in unrealized gain on available-for-sale securities, net of income taxes	1,625	'	'	'	'	1,625
Exercise of common stock options, shares	'	'	154,411	'	'	'
Exercise of common stock warrants, value	2,524	'	'	2,524	'	'
Exercise of common stock warrants, shares	'	'	287,948	'	'	'
Tax benefits related to stock-based compensation	445	'	'	445	'	'
Conversion of preferred stock to common stock, share	'	-916,175	916,175	'	'	'
Issuance of restricted stock, shares	'	'	200,000	'	'	'
Issuance of common stock	20,082	'	'	20,082	'	'
Issuance of common stock, shares	'	'	1,840,000	'	'	'
Common stock dividends	-4,711	'	'	'	-4,711	'
Preferred stock dividends	-286	'	'	'	-286	'
Stock-based compensation	522	'	'	522	'	'
Ending Balance at Sep. 30, 2012	101,087	'	'	53,209	46,045	1,833
Ending Balance, shares at Sep. 30, 2012	'	331,525	9,601,019	'	'	'
Beginning Balance at Dec. 31, 2012	121,253	'	'	63,875	55,758	1,620
Beginning Balance, shares at Dec. 31, 2012	'	241,182	10,877,537	'	'	'
Net income	50,000	'	'	'	50,000	'
Change in unrealized gain on available-for-sale securities, net of income taxes	-449	'	'	'	'	-449
Tax benefits related to stock-based compensation	892	'	'	892	'	'
Conversion of preferred stock to common stock, share	'	-91,263	91,263	'	'	'
Issuance of restricted stock, shares	'	'	564,000	'	'	'
Forfeiture of restricted stock, share	'	'	-29,260	'	'	'
Repurchase of common stock, value	-893	'	'	-893	'	'
Repurchase of common stock, shares	'	'	-26,705	'	'	'
Common stock dividends	-7,600	'	'	'	-7,600	'
Preferred stock dividends	-88	'	'	'	-88	'
Stock-based compensation	3,418	'	'	3,418	'	'
Ending Balance at Sep. 30, 2013	$166,533	'	'	$67,292	$98,070	$1,171
Ending Balance, shares at Sep. 30, 2013	'	149,919	11,476,835	'	'	'

Summary_of_Significant_Account

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	Note 1 – Summary of Significant Accounting Policies
	Basis of Presentation
	The accompanying unaudited, consolidated financial statements for HCI Group, Inc. and its subsidiaries (collectively, the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information, and the Securities and Exchange Commission (“SEC”) rules for interim financial reporting. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been omitted pursuant to such rules and regulations. However, in the opinion of management, the accompanying financial statements reflect all normal recurring adjustments necessary to present fairly the Company’s financial position as of September 30, 2013 and the results of operations and cash flows for the periods presented. The results of operations for the interim periods presented are not necessarily indicative of the results of operations to be expected for any subsequent interim period or for the fiscal year ending December 31, 2013. The accompanying unaudited consolidated financial statements and notes thereto should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2012 included in the Company’s Form 10-K, which was filed with the SEC on March 14, 2013.
	In preparing the interim unaudited consolidated financial statements, management was required to make certain estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses and related disclosures at the financial reporting date and throughout the periods being reported upon. Certain of the estimates result from judgments that can be subjective and complex and consequently actual results may differ from these estimates.
	Material estimates that are particularly susceptible to significant change in the near term relate to the determination of losses and loss adjustment expenses, assumed reinsurance balances, the recoverability of deferred policy acquisition costs, and the determination of deferred income taxes. Although considerable variability is inherent in these estimates, management believes that the amounts provided are reasonable. These estimates are continually reviewed and adjusted as necessary. Such adjustments are reflected in current operations.
	All significant intercompany balances and transactions have been eliminated.
	Reclassifications. Certain reclassifications of prior period amounts have been made to conform to the current period presentation.
	Reinsurance Contracts
	The Company enters into excess of loss reinsurance contracts to minimize its net loss exposure to catastrophic loss events. Certain of the Company’s current contracts contain retrospective provisions including terms and conditions that adjust premiums, increase the amount of future coverage, or result in profit commissions based on the loss experience under the contracts. In such cases, a with-and-without method is used to estimate the asset or liability amount to be recognized at each reporting date. The amount of the estimate is the difference between the net contract costs before and after the loss experience under the contract. Estimates related to premium adjustments, profit commissions and coverage changes are recognized in ceded premiums earned. These estimates are reviewed monthly based on the loss experience to date and as adjustments become necessary. Such adjustments are reflected in the Company’s current operations.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2013
Accounting Changes And Error Corrections [Abstract]	'
Recent Accounting Pronouncements	'
	Note 2 – Recent Accounting Pronouncements
	There have been no recent accounting pronouncements or changes in recent accounting pronouncements during the nine months ended September 30, 2013, as compared to those described in our Annual Report on Form 10-K for the fiscal year ended December 31, 2012, that are of significance, or potential significance, to the Company.

Investments

Investments	9 Months Ended
	Sep. 30, 2013
Investments Debt And Equity Securities [Abstract]	'
Investments	'
	Note 3 – Investments
	The Company holds investments in fixed-maturity securities and equity securities that are classified as available-for-sale. At September 30, 2013 and December 31, 2012, the amortized cost, gross unrealized gains and losses, and estimated fair value of the Company’s available-for-sale securities by security type were as follows:
			Amortized			Gross			Gross			Estimated
			Cost			Unrealized			Unrealized			Fair
						Gain			Loss			Value
	As of September 30, 2013
	Fixed-maturity securities
	U.S. Treasury and U.S. government agencies		$	4,669			129			(1	)		4,797
	Corporate bonds			16,591			430			(56	)		16,965
	Commercial mortgage-backed securities			10,816			546			(83	)		11,279
	State, municipalities, and political subdivisions			27,503			848			(77	)		28,274
	Redeemable preferred stock			780			7			(9	)		778
	Total			60,359			1,960			(226	)		62,093
	Equity securities			11,834			595			(458	)		11,971
	Total available-for-sale securities		$	72,193			2,555			(684	)		74,064
	As of December 31, 2012
	Fixed-maturity securities
	U.S. Treasury and U.S. government agencies		$	1,359			88			—			1,447
	Corporate bonds			10,298			572			(10	)		10,860
	Commercial mortgage-backed securities			10,708			936			—			11,644
	State, municipalities, and political subdivisions			10,152			914			—			11,066
	Redeemable preferred stock			919			18			(1	)		936
	Total			33,436			2,528			(11	)		35,953
	Equity securities			8,756			303			(183	)		8,876
	Total available-for-sale securities		$	42,192			2,831			(194	)		44,829
	The scheduled maturities of fixed-maturity securities at September 30, 2013 are as follows:
			Amortized			Estimated
			Cost			Fair Value
	Available-for-sale
	Due in one year or less		$	1,799			1,814
	Due after one year through five years			9,709			10,002
	Due after five years through ten years			28,777			29,476
	Due after ten years			9,258			9,522
	Commercial mortgage-backed securities			10,816			11,279
			$	60,359			62,093
	Investment Sales
	Proceeds received, and the gross realized gains and losses from sales of available-for-sale securities, for the three and nine months ended September 30, 2013 and 2012 were as follows:
			Proceeds			Gross			Gross
						Realized			Realized
						Gains			Losses
	Three months ended September 30, 2013
	Fixed-maturity securities		$	390			58			(1	)
	Equity securities		$	708			20			(46	)
	Three months ended September 30, 2012
	Fixed-maturity securities		$	2,517			1			(4	)
	Equity securities		$	551			30			(31	)
	Nine months ended September 30, 2013
	Fixed-maturity securities		$	1,749			92			(4	)
	Equity securities		$	2,021			84			(129	)
	Nine months ended September 30, 2012
	Fixed-maturity securities		$	4,936			41			(7	)
	Equity securities		$	2,063			38			(46	)
	Other-than-temporary Impairment
	The Company regularly reviews its individual investment securities for other-than-temporary impairment. The Company considers various factors in determining whether each individual security is other-than-temporarily impaired, including:
		•		the financial condition and near-term prospects of the issuer, including any specific events that may affect its operations or earnings;
		•		the length of time and the extent to which the market value of the security has been below its cost or amortized cost;
		•		general market conditions and industry or sector specific factors;
		•		nonpayment by the issuer of its contractually obligated interest and principal payments; and
		•		the Company’s intent and ability to hold the investment for a period of time sufficient to allow for the recovery of costs.
	Securities with gross unrealized loss positions at September 30, 2013, aggregated by investment category and length of time the individual securities have been in a continuous loss position, are as follows:
			Less Than Twelve						Twelve Months or					Total
			Months						Greater
	As of September 30, 2013		Gross			Estimated			Gross			Estimated		Gross			Estimated
Unrealized			Fair			Unrealized			Fair			Unrealized		Fair
Loss			Value			Loss			Value			Loss		Value
Fixed-maturity securities
U.S. Treasury and U.S. government agencies		$	(1	)		311			—			—		(1	)		311
Corporate bonds			(56	)		3,579			—			—		(56	)		3,579
Commercial mortgage-backed securities			(82	)		2,205			—			—		(82	)		2,205
State, municipalities, and political subdivisions			(77	)		1,799			—			—		(77	)		1,799
Redeemable preferred stock			(10	)		435			—			3		(10	)		438
Total fixed-maturity securities			(226	)		8,329			—			3		(226	)		8,332
Equity securities			(361	)		7,700			(97	)		230		(458	)		7,930
Total available-for-sale securities		$	(587	)		16,029			(97	)		233		(684	)		16,262
The Company believes there are no fundamental issues such as credit losses or other factors with respect to any of its available-for-sale securities. The unrealized losses on investments in fixed-maturity securities were caused primarily by interest-rate changes. It is expected that the securities will not be settled at a price less than the par value of the investments. In determining whether equity securities are other-than-temporarily impaired, the Company considers its intent and ability to hold a security for a period of time sufficient to allow for the recovery of cost. Because the declines in fair value are attributable to changes in interest rates or market conditions and not credit quality, and because the Company has the ability and intent to hold its available-for-sale investments until a market price recovery or maturity, the Company does not consider any of its investments to be other-than-temporarily impaired at September 30, 2013.
Other Investments
Other investments consist of the following as of September 30, 2013 and December 31, 2012:
		September 30,			December 31,
		2013			2012
Land		$	11,299			10,993
Land improvements			1,351			1,326
Buildings			3,020			2,869
Other			1,414			1,238
Total, at cost			17,084			16,426
Less: accumulated depreciation and amortization			(626	)		(339	)
Other investments		$	16,458			16,087
Depreciation and amortization expense related to other investments was $99 and $91, respectively, for the three months ended September 30, 2013 and 2012 and $290 and $186, respectively, for the nine months ended September 30, 2013 and 2012.

Property_and_Equipment_Net

Property and Equipment, Net	9 Months Ended
	Sep. 30, 2013
Property Plant And Equipment [Abstract]	'
Property and Equipment, Net	'
	Note 4 – Property and Equipment, net
	On February 28, 2013, the Company purchased real estate in Ocala, Florida for a total purchase price of $2,002. The real estate consists of 1.6 acres of land and a vacant office building with rentable area of approximately 16,000 square feet. The facility will be used by the Company’s insurance operations and, also, as an alternative location in the event a catastrophic event impacts the Company’s home office and other support operations.

LongTerm_Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Long-Term Debt	'
	Note 5 – Long-Term Debt
	On January 17, 2013, the Company completed the sale of unsecured senior notes in a public offering for an aggregate principal amount of $35,000. In addition, effective January 25, 2013, the Company received an aggregate principal amount of $5,250 pursuant to the underwriters’ exercise of the over-allotment option. The offering was made pursuant to the Company’s effective registration statement on Form S-3, as amended (Registration Statement No. 333-185228) and the prospectus supplement dated January 10, 2013. The combined net proceeds were $38,690 after underwriting and issuance costs of approximately $1,560 of which $1,525 was paid during the nine months ended September 30, 2013. The notes will mature on January 30, 2020 and bear interest at a fixed annual rate of 8% payable quarterly on January 30, April 30, July 30 and October 30, commencing on April 30, 2013. The notes may be redeemed, in whole or in part, at any time on and after January 30, 2016 upon not less than 30 or more than 60 days’ notice. The redemption price will be equal to 100% of the principal amount redeemed plus accrued and unpaid interest. Additionally, the Company may, at any time, repurchase the senior notes at any price in the open market and may hold, resell or surrender the notes for cancellation.
	The senior notes rank on parity with all of the Company’s other existing and future senior unsecured obligations. In addition, to the extent the senior notes are unsecured, they also rank junior in right of payment to any secured debt that the Company may have outstanding to the extent of the value of the assets securing such debt.
	The senior notes contain customary restrictive covenants relating to merger, modification of the indenture, subordination, issuance of debt securities and sale of assets, the most significant of which include limitations with respect to certain designated subsidiaries on the incurrence of additional indebtedness or guarantees secured by any security interest on any shares of their capital stock. The senior note covenants also limit the Company’s ability to sell or otherwise dispose of any shares of capital stock of such designated subsidiaries. The senior note covenants do not contain any restrictions on the Company’s payment or declaration of dividends nor require a sinking fund to be established for the purpose of redemption.
	Interest expense with respect to the senior notes was approximately $847 and $2,379, respectively, for the three and nine months ended September 30, 2013 and included amortization of debt issuance costs of approximately $42 and $116, respectively. The effective interest rate, taking into account the stated interest expense and amortization of debt issuance costs, approximates 8.7%.

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	Note 6 – Fair Value Measurements
	The Company records and discloses certain financial assets at their estimated fair value but does not elect the fair value option for its long-term debt. The fair value hierarchy prioritizes the inputs to valuation techniques used to measure fair value into three broad levels as follows:
	Level 1	–		Unadjusted quoted prices in active markets for identical assets or liabilities.
	Level 2	–		Other inputs that are observable for the asset and liability, either directly or indirectly.
	Level 3	–		Inputs that are unobservable.
	The following table presents information about the Company’s financial assets measured at estimated fair value on a recurring basis and the estimated fair value of long-term debt that is reflected in the financial statements at carrying value. The table indicates the fair value hierarchy of the valuation techniques utilized by the Company to determine such fair value as of September 30, 2013 and December 31, 2012:
		Fair Value Measurements Using
		(Level 1)			(Level 2)		(Level 3)		Total
	As of September 30, 2013
	Financial Assets:
	Cash and cash equivalents	$	273,878			—		—		273,878
	Fixed-maturity securities:
	U.S. Treasury and U.S. government agencies		3,630			1,167		—		4,797
	Corporate bonds		16,004			961		—		16,965
	Commercial mortgage-backed securities		—			11,279		—		11,279
	State, municipalities, and political subdivisions		—			28,274		—		28,274
	Redeemable preferred stock		778			—		—		778
	Total fixed-maturity securities		20,412			41,681		—		62,093
	Equity securities		11,971			—		—		11,971
	Total available-for-sale securities		32,383			41,681		—		74,064
	Total	$	306,261			41,681		—		347,942
	Financial Liabilities:
	Long-term debt	$	—			42,279		—		42,279
	Long-term debt represents the Company’s 8.00% senior notes due 2020. The senior notes were initially sold to the public in January 2013 and trade on the New York Stock Exchange. The estimated fair value is based on the closing market price.
		Fair Value Measurements Using
		(Level 1)			(Level 2)		(Level 3)		Total
	As of December 31, 2012
	Financial Assets:
	Cash and cash equivalents	$	230,214			—		—		230,214
	Fixed-maturity securities:
	U.S. Treasury and U.S. government agencies		583			864		—		1,447
	Corporate bonds		10,860			—		—		10,860
	Commercial mortgage-backed securities		—			11,644		—		11,644
	State, municipalities, and political subdivisions		—			11,066		—		11,066
	Redeemable preferred stock		936			—		—		936
	Total fixed-maturity securities		12,379			23,574		—		35,953
	Equity securities		8,876			—		—		8,876
	Total available-for-sale securities		21,255			23,574		—		44,829
	Total	$	251,469			23,574		—		275,043
	During the second quarter of 2013, the Company analyzed its investment portfolio and determined the municipal bonds, which were previously classified as Level 1, should be classified as Level 2 based on the inputs used to measure fair value and the level of market activity in those instruments. As such, transfers into Level 2 from Level 1 were $10,684 during the nine months ended September 30, 2013. In addition, $11,066 related to municipal bonds included in the table related to December 31, 2012 was transferred from Level 1 to Level 2. There were no transfers between Level 1, 2 or 3 during the three months ended September 30, 2013.

Reinsurance

Reinsurance	9 Months Ended
	Sep. 30, 2013
Insurance [Abstract]	'
Reinsurance	'
	Note 7 – Reinsurance
	The Company cedes a portion of its homeowners insurance exposure to other entities under catastrophe excess of loss reinsurance treaties. The Company remains liable with respect to claims payments in the event that any of the reinsurers is unable to meet its obligations under the reinsurance agreements. The Company evaluates the financial condition of its reinsurers and monitors concentrations of credit risk arising from similar geographic regions, activities or economic characteristics of the reinsurers to minimize its exposure to significant losses from reinsurer insolvencies. The Company contracts with a number of established and rated or fully collateralized reinsurers to secure its reinsurance coverage. The Company purchases reinsurance each year taking into consideration projected losses and reinsurance market conditions.
	The impact of the catastrophe excess of loss reinsurance treaties on premiums written and earned is as follows:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Premiums Written:
	Direct	$	78,140			53,676			281,912			175,518
	Assumed		(221	)		(150	)		(2,297	)		(1,770	)
	Gross written		77,919			53,526			279,615			173,748
	Ceded		(28,310	)		(22,506	)		(74,923	)		(53,475	)
	Net premiums written	$	49,609			31,020			204,692			120,273
	Premiums Earned:
	Direct	$	75,512			46,048			193,465			119,219
	Assumed		5,732			7,061			52,278			42,360
	Gross earned		81,244			53,109			245,743			161,579
	Ceded		(28,310	)		(22,506	)		(74,923	)		(53,475	)
	Net premiums earned	$	52,934			30,603			170,820			108,104
	During the three and nine months ended September 30, 2013 and 2012, there were no recoveries pertaining to reinsurance contracts that were deducted from losses incurred. At September 30, 2013 and December 31, 2012, prepaid reinsurance premiums related to 27 and 31 reinsurers, respectively, and there were no amounts receivable with respect to reinsurers. Thus, there were no concentrations of credit risk associated with reinsurance receivables and prepaid reinsurance premiums as of September 30, 2013 and December 31, 2012.
	Certain of the reinsurance contracts include retrospective provisions that adjust premiums, increase the amount of future coverage, or result in profit commissions in the event losses are minimal or zero. During the three and nine months ended September 30, 2013, the Company has recognized benefits of $5,484 and $6,785, respectively, in connection with these provisions. See “Reinsurance Contracts” under Note 1 – “Summary of Significant Accounting Policies.”

Losses_and_Loss_Adjustment_Exp

Losses and Loss Adjustment Expenses	9 Months Ended
	Sep. 30, 2013
Insurance [Abstract]	'
Losses and Loss Adjustment Expenses	'
	Note 8 – Losses and Loss Adjustment Expenses
	The liability for losses and loss adjustment expenses is determined on an individual case basis for all claims reported. The liability also includes amounts for unallocated expenses, anticipated future claim development and losses incurred, but not reported.
	Activity in the liability for unpaid losses and loss adjustment expenses is summarized as follows:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Balance, beginning of period	$	44,749			37,313			41,168			27,424
	Incurred related to:
	Current period		14,851			16,787			50,213			51,188
	Prior period		(362	)		(1,770	)		(2,438	)		(806	)
	Total incurred		14,489			15,017			47,775			50,382
	Paid related to:
	Current period		(12,628	)		(11,867	)		(25,880	)		(24,949	)
	Prior period		(3,086	)		(1,737	)		(19,539	)		(14,131	)
	Total paid		(15,714	)		(13,604	)		(45,419	)		(39,080	)
	Balance, end of period	$	43,524			38,726			43,524			38,726
	The establishment of loss reserves is an inherently uncertain process and changes in loss reserve estimates are expected as such estimates are subject to the outcome of future events. Changes in estimates, or differences between estimates and amounts ultimately paid, are reflected in the operating results of the period during which such adjustments are made. During the three and nine months ended September 30, 2013, the Company experienced favorable development of $362 and $2,438, respectively, with respect to its net unpaid losses and loss adjustment expenses established as of June 30, 2013 and December 31, 2012. Factors attributable to this favorable development include a lower severity of claims and reduced frequency of reported claims.
	The Company writes insurance in the state of Florida, which could be exposed to hurricanes or other natural catastrophes. The occurrence of a major catastrophe could have a significant effect on the Company’s monthly or quarterly results and cause a temporary disruption of the normal operations of the Company. However, the Company is unable to predict the frequency or severity of any such events that may occur in the near term or thereafter.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Note 9 – Income Taxes
	During the three months ended September 30, 2013 and 2012, the Company recorded approximately $8,266 and $2,299, respectively, of income taxes, which resulted in estimated annual effective tax rates of 38.2% and 44.9%, respectively. During the nine months ended September 30, 2013 and 2012, the Company recorded approximately $31,221 and $11,459, respectively, of income taxes, which resulted in estimated annual effective tax rates of 38.4% and 40.2%, respectively. The Company’s estimated annual effective tax rate differs from the statutory federal income tax rate due to state and foreign income taxes and stock-based compensation as well as certain nondeductible items.

Earnings_Per_Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	Note 10 – Earnings Per Share
	U.S. GAAP requires the Company to use the two-class method in computing basic earnings per share since holders of the Company’s restricted stock have the right to share in dividends, if declared, equally with common stockholders. These participating securities effect the computation of both basic and diluted earnings per share during periods of net income.
	A summary of the numerator and denominator of the basic and diluted earnings per common share is presented below:
		Three Months Ended							Three Months Ended
		September 30, 2013							September 30, 2012
		Income			Shares		Per Share		Income			Shares		Per Share
		(Numerator)			(Denominator)		Amount		(Numerator)			(Denominator)		Amount
	Net income	$	13,378						$	2,826
	Less: Preferred stock dividends		(22	)						(42	)
	Less: Income attributable to participating securities		(823	)						(18	)
	Basic Earnings Per Share:
	Income allocated to common stockholders		12,533			10,749	$	1.17		2,766			9,238	$	0.3
	Effect of Dilutive Securities:
	Stock options		—			164				—			222
	Convertible preferred stock		22			165				42			441
	Warrants		—			—				—			584
	Diluted Earnings Per Share:
	Income available to common stockholders and assumed conversions	$	12,555			11,078	$	1.13	$	2,808			10,485	$	0.27
		Nine Months Ended							Nine Months Ended
		September 30, 2013							September 30, 2012
		Income			Shares		Per Share		Income			Shares		Per Share
		(Numerator)			(Denominator)		Amount		(Numerator)			(Denominator)		Amount
	Net income	$	50,000						$	17,056
	Less: Preferred stock dividends		(88	)						(286	)
	Less: Income attributable to participating securities		(2,205	)						(171	)
	Basic Earnings Per Share:
	Income allocated to common stockholders		47,707			10,696	$	4.46		16,599			7,968	$	2.08
	Effect of Dilutive Securities:
	Stock options		—			162				—			230
	Convertible preferred stock		88			195				286			783
	Warrants		—			—				—			453
	Diluted Earnings Per Share:
	Income available to common stockholders and assumed conversions	$	47,795			11,053	$	4.32	$	16,885			9,434	$	1.79

Stockholders_Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2013
Equity [Abstract]	'
Stockholders' Equity	'
	Note 11 – Stockholders’ Equity
	Common Stock
	On July 16, 2013, the Company’s Board of Directors declared a quarterly dividend of $0.225 per common share. The dividends were paid on September 20, 2013 to stockholders of record on August 16, 2013.
	Common Stock Warrants
	All common stock warrants were either exercised or cancelled during the year ended December 31, 2012.
	Preferred Stock
	As of September 30, 2013, 149,919 shares of Series A cumulative convertible preferred stock (“Series A Preferred”) remain outstanding. During the three and nine months ended September 30, 2013, holders of 41,831 and 91,263 shares of Series A Preferred converted their Series A Preferred shares to 41,831 and 91,263 shares of common stock, respectively.
	On September 17, 2013, the Company’s Board of Directors declared a cash dividend on its Series A Preferred shares in the amount of $0.05833 per share for each of the months of September, October, and November 2013. The September dividend was paid on October 28, 2013 to shareholders of record at the close of business on October 1, 2013. The October dividend is payable on November 27, 2013 to shareholders of record at the close of business on November 1, 2013. The November dividend is payable on December 27, 2013 to shareholders of record at the close of business on December 2, 2013.

StockBased_Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Stock-Based Compensation	'
	Note 12 – Stock-Based Compensation
	Incentive Plans
	The Company has outstanding stock options and restricted stock granted under the 2007 Stock Option and Incentive Plan (“2007 Plan”) and its 2012 Omnibus Incentive Plan (the “2012 Plan”). The 2007 Plan was terminated in 2012. Thus, there are no longer available shares for future grants under the 2007 Plan. Under the 2012 Plan, the aggregate number of shares of the Company’s common stock reserved and available for issuance is 5,000,000. With respect to the 2012 Plan at September 30, 2013, no incentive stock options had been granted, 608,060 shares of restricted stock were outstanding, and 4,391,940 shares were available for future grant.
	Stock Options
	Outstanding stock options granted under the 2007 Plan vest over periods ranging from immediately vested to five years and are exercisable over the contractual term of ten years.
	A summary of the activity in the Company’s 2007 Plan for the three and nine months ended September 30, 2013 and 2012 is as follows (option amounts not in thousands):
							Weighted
					Weighted		Average
					Average		Remaining			Aggregate
		Number of			Exercise		Contractual			Intrinsic
		Options			Price		Term			Value
	Outstanding at January 1, 2013		280,000		$	2.91		4.9 years		$	5,007
	Outstanding at March 31, 2013		280,000			2.91		4.7 years		$	6,816
	Outstanding at June 30, 2013		280,000			2.91		4.4 years		$	7,788
	Outstanding at September 30, 2013		280,000			2.91		4.2 years		$	10,621
	Exercisable at September 30, 2013		270,000		$	2.78		4.0 years		$	10,276
	Outstanding at January 1, 2012		620,000		$	2.97		5.7 years		$	3,122
	Exercised		(217,003	)		3.33
	Outstanding at March 31, 2012		402,997			2.78		5.5 years		$	3,997
	Outstanding at June 30, 2012		402,997			2.78		5.3 years		$	5,971
	Exercised		(10,000	)		2.5
	Outstanding at September 30, 2012		392,997			2.79		5.0 years		$	8,139
	Exercisable at September 30, 2012		372,997		$	2.6		4.8 years		$	7,795
	The following table summarizes information about options exercised for the three and nine months ended September 30, 2013 and 2012 (option amounts not in thousands):
		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2013			2012		2013			2012
	Options exercised		—			10,000		—			227,003
	Total intrinsic value of exercised options		—		$	182		—		$	1,652
	Fair value of vested stock options		—			—	$	17		$	22
	Tax benefits realized		—		$	8		—		$	445
	During the three and nine months ended September 30, 2012, 10,000 and 227,003 options, respectively, were exercised and net settled by surrender of 1,183 and 72,592 shares, respectively. The Company recognized compensation expense of approximately $5 for each of the three months ended September 30, 2013 and 2012 and $14 and $63, respectively, for the nine months ended September 30, 2013 and 2012. At September 30, 2013, there was approximately $11 of unrecognized compensation expense related to nonvested stock options granted under the plan. The Company expects to recognize the remaining compensation expense over a weighted-average period of 7 months. Deferred tax benefits related to stock options for the three and nine months ended September 30, 2013 and 2012 were immaterial.
	Restricted Stock Awards
	From time to time, the Company has granted and may grant restricted stock awards to certain executive officers, other employees and nonemployee directors in connection with their service to the Company. The terms of the Company’s outstanding restricted stock grants may include service, performance and market-based conditions. The fair value of the awards with market-based conditions is determined using a Monte Carlo simulation method which calculates many potential outcomes for an award and then establishes fair value based on the most likely outcome. The determination of fair value with respect to the awards with only performance or service-based conditions is based on the value of the Company’s common stock on the grant date.
	Information with respect to the activity of unvested restricted stock awards during the three and nine months ended September 30, 2013 and 2012 is as follows (share amounts not in thousands):
		Number of			Weighted
		Restricted			Average
		Stock			Grant Date
		Awards			Fair Value
	Nonvested at January 1, 2013		246,320		$	14.54
	Forfeited		(920	)
	Nonvested at March 31, 2013		245,400		$	14.51
	Granted		544,000		$	26.58
	Vested		(29,000	)
	Forfeited		(28,160	)
	Nonvested at June 30, 2013		732,240		$	23.53
	Granted		20,000		$	32.85
	Vested		(56,000	)
	Forfeited		(180	)
	Nonvested at September 30, 2013		696,060		$	24.75
	Nonvested at January 1, 2012		—			—
	Nonvested at March 31, 2012		—			—
	Granted		200,000		$	12.91
	Nonvested at June 30, 2012		200,000		$	12.91
	Nonvested at September 30, 2012		200,000		$	12.91
	The Company recognized compensation expense of $1,939 and $306, respectively, for the three months ended September 30, 2013 and 2012 and $3,404 and $459, respectively, for the nine months ended September 30, 2013 and 2012. At September 30, 2013, there was approximately $14,078 of total unrecognized compensation expense related to nonvested restricted stock arrangements granted under the Company’s 2007 Plan and 2012 Plan. The Company expects to recognize the remaining compensation expense over a weighted-average period of 29 months. The following table summarizes information about deferred tax benefits recognized related to restricted stock awards and the fair value of vested restricted stock for the three and nine months ended September 30, 2013 and 2012:
		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2013			2012		2013			2012
	Deferred tax benefits recognized	$	748		$	118	$	1,313		$	177
	Fair value of vested restricted stock	$	648		$	—	$	1,027		$	—
	For the three and nine months ended September 30, 2013, the Company realized tax benefits of approximately $116 and $199, respectively, related to cash dividends paid on restricted stock. The following presents assumptions used in a Monte Carlo simulation model to determine the fair value of the awards with market-based conditions:
		Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2013			2012		2013			2012
Expected dividends per share	$	0.9			—	$	0.9		$	0.8
Expected volatility		41.5 – 48.7	%		—		41.5 – 51.6	%		36.7 – 50.0	%
Risk-free interest rate		0.0 – 1.1	%		—		0.0 – 1.1	%		0.1 – 1.2	%
Estimated cost of capital		9.9	%		—		9.3 – 9.9	%		11.9 – 12.1	%
Expected life (in years)		4			—		4.00 – 6.00			6

Defined_Contribution_Plan

Defined Contribution Plan	9 Months Ended
	Sep. 30, 2013
Compensation And Retirement Disclosure [Abstract]	'
Defined Contribution Plan	'
	Note 13 – Defined Contribution Plan
	Effective July 1, 2013, the Company implemented a 401(k) Safe Harbor Profit Sharing Plan (“401(k) Plan”) that qualifies as a defined contribution plan under Section 401(k) of the Internal Revenue Code. Under the 401(k) Plan, participating employees are eligible for company matching and discretionary profit sharing contributions. Plan participants may elect to defer up to one hundred percent of their pre-tax gross wages, subject to annual limitations. The company matching contribution is limited to a maximum of four percent of the employee’s annual salary or wage and is fully vested when contributed. Eligibility and vesting of the Company’s discretionary profit sharing contribution is subject to the plan participant’s years of service. During the three and nine months ended September 30, 2013, the Company contributed approximately $67.

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Note 14 – Commitments and Contingencies
	Environmental Matters
	In connection with the acquisition in April 2011 of one of the Company’s properties located in Pinellas County, Florida, the Company assumed the liability to complete a site assessment and remediation of environmental contamination that resulted from a petroleum release at the marina site in late 2009. At acquisition, the Company recorded a liability of $150 with respect to the planned remedial action. Such liability was determined based on reasonably estimable costs of completing the actions defined in the work plan. As of September 30, 2013, a total of $115 has been expended with respect to the site assessment and remediation and the remaining $35 accrued at acquisition is included in other liabilities in the accompanying consolidated balance sheets. Even with the Company’s best effort in estimating the costs, it is possible that additional testing and additional environmental monitoring and remediation will be required as part of the Company’s ongoing discussions with the Florida Department of Health, the agency contracted by the Florida Department of Environmental Protection to administer cases of petroleum contamination in Pinellas County, in which case additional expenses could exceed the current estimated liability. However, based on information known at September 30, 2013, the Company does not expect that such additional expenses would have a material adverse effect on the liquidity or financial condition of the Company.
	Premium Tax
	In September 2013, the Company received a notice of intent to make audit adjustments from the Pittsburgh Service Center of the Florida Department of Revenue (“FDR”) in connection with the FDR’s audit of the Company’s premium tax returns for the three-year period ended December 31, 2012. The auditor’s proposed adjustments primarily relate to the disallowance of the entire amount of $1,754 in Florida salary credits applicable to that period. The proposed adjustment, which includes interest through September 10, 2013, approximates $1,913. Management held informal discussions with the FDR audit staff who forwarded their file along with our response to the FDR’s Tallahassee office for review. The Tallahassee office issued a notice of proposed assessment on October 2, 2013 supporting the auditor’s adjustment and offering several avenues the Company has to request further FDR review of this matter. The Company is confident in the merits of its position in claiming the Florida salary credits and intends to vigorously defend its position. As such, and based on the current status of and likelihood of final resolution, the Company has no amount accrued as of September 30, 2013 related to this contingency.

Related_Party_Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2013
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	Note 15 – Related Party Transactions
	Claddaugh Casualty Insurance Company, Ltd. (“Claddaugh”), the Company’s Bermuda-based captive reinsurer, has one reinsurance treaty with Moksha Re SPC Ltd. and multiple capital partners (“Moksha”) whereby a portion of the business assumed from the Company’s insurance subsidiary, Homeowners Choice Property & Casualty Insurance Company, Inc. (“HCPCI”), is ceded by Claddaugh to Moksha. With respect to the period from June 1, 2013 through May 31, 2014, Moksha assumed approximately $15,400 of the total covered exposure for approximately $4,300 in premiums, a rate which management believes to be competitive with market rates available to Claddaugh. The $4,300 premium was fully paid by Claddaugh on June 27, 2013. Moksha has deposited funds into a trust account to fully collateralize Moksha’s exposure. Trust assets may be withdrawn by HCPCI, the trust beneficiary, in the event amounts are due under the 2013-2014 Moksha reinsurance agreement. Among the Moksha capital partner participants are the Company’s chief executive officer, Paresh Patel, and certain of his immediate family members and Sanjay Madhu, one of the Company’s non-employee directors.
	Claddaugh also has reinsurance treaties with Oxbridge Reinsurance Limited (“Oxbridge”) whereby a portion of the business assumed from HCPCI is ceded by Claddaugh to Oxbridge. With respect to the period from June 1, 2013 through May 31, 2014, Oxbridge assumed $10,100 of the total covered exposure for approximately $4,900 in premiums, a rate which management believes to be competitive with market rates available to Claddaugh. The $4,900 premium was fully paid by Claddaugh on July 9, 2013. Oxbridge has deposited funds into a trust account to fully collateralize Oxbridge’s exposure. Trust assets may be withdrawn by HCPCI, the trust beneficiary, in the event amounts are due under the 2013-2014 Oxbridge reinsurance agreement. Among the Oxbridge capital partner participants are Paresh Patel, the Company’s chief executive officer who is also chairman of the board of directors for Oxbridge, and members of his immediate family and Anthony Saravanos, president of Greenleaf Capital, the Company’s real estate division. In addition, two of the Company’s non-employee directors, including Sanjay Madhu who serves as Oxbridge’s president and chief executive officer, are investors in Oxbridge.

Subsequent_Events

Subsequent Events	9 Months Ended
	Sep. 30, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	Note 16 – Subsequent Events
	On October 17, 2013, the Company’s Board of Directors declared a quarterly dividend of $0.275 per common share. The dividends are payable on December 20, 2013 to stockholders of record on November 15, 2013.
	On October 17, 2013, the Company’s Board of Directors declared a dividend distribution of one preferred share purchase right (“Right”) for each outstanding share of the Company’s common stock, no par value (“Common Shares”). The dividend is payable to the shareholders of record at the close of business on November 15, 2013. Each Right entitles the registered holder to purchase from the Company one one-hundredth of a share of Series B Junior Participating Preferred Stock, no par value (“Series B Preferred Share”), of the Company, at a price of $125.00 per one one-hundredth of a Series B Preferred Share, subject to adjustment. The description and terms of the Rights are set forth in a rights agreement, dated October 18, 2013, between the Company and American Stock Transfer & Trust Company, LLC, as rights agent. The Rights become exercisable in the event any person or group acquires 10% or more of the Common Shares without the approval of the Company’s Board of Directors, and until such time are inseparable from and trade with the Common Shares. The Rights have a de minimis fair value. The Rights Agreement expires October 18, 2018.
	On November 5, 2013, the Company assumed approximately 35,000 policies from Citizens Property Insurance Corporation representing approximately $78,000 in additional annualized premiums.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	The accompanying unaudited, consolidated financial statements for HCI Group, Inc. and its subsidiaries (collectively, the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information, and the Securities and Exchange Commission (“SEC”) rules for interim financial reporting. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been omitted pursuant to such rules and regulations. However, in the opinion of management, the accompanying financial statements reflect all normal recurring adjustments necessary to present fairly the Company’s financial position as of September 30, 2013 and the results of operations and cash flows for the periods presented. The results of operations for the interim periods presented are not necessarily indicative of the results of operations to be expected for any subsequent interim period or for the fiscal year ending December 31, 2013. The accompanying unaudited consolidated financial statements and notes thereto should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2012 included in the Company’s Form 10-K, which was filed with the SEC on March 14, 2013.
	In preparing the interim unaudited consolidated financial statements, management was required to make certain estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses and related disclosures at the financial reporting date and throughout the periods being reported upon. Certain of the estimates result from judgments that can be subjective and complex and consequently actual results may differ from these estimates.
	Material estimates that are particularly susceptible to significant change in the near term relate to the determination of losses and loss adjustment expenses, assumed reinsurance balances, the recoverability of deferred policy acquisition costs, and the determination of deferred income taxes. Although considerable variability is inherent in these estimates, management believes that the amounts provided are reasonable. These estimates are continually reviewed and adjusted as necessary. Such adjustments are reflected in current operations.
	All significant intercompany balances and transactions have been eliminated.
Reclassifications	'
	Reclassifications. Certain reclassifications of prior period amounts have been made to conform to the current period presentation.
Reinsurance Contracts	'
	Reinsurance Contracts
	The Company enters into excess of loss reinsurance contracts to minimize its net loss exposure to catastrophic loss events. Certain of the Company’s current contracts contain retrospective provisions including terms and conditions that adjust premiums, increase the amount of future coverage, or result in profit commissions based on the loss experience under the contracts. In such cases, a with-and-without method is used to estimate the asset or liability amount to be recognized at each reporting date. The amount of the estimate is the difference between the net contract costs before and after the loss experience under the contract. Estimates related to premium adjustments, profit commissions and coverage changes are recognized in ceded premiums earned. These estimates are reviewed monthly based on the loss experience to date and as adjustments become necessary. Such adjustments are reflected in the Company’s current operations.

Investments_Tables

Investments (Tables)	9 Months Ended
	Sep. 30, 2013
Investments Debt And Equity Securities [Abstract]	'
Summary of Amortized Cost, Gross Unrealized Gains and Losses, and Estimated Fair Value Available-for-Sale Securities	'
	At September 30, 2013 and December 31, 2012, the amortized cost, gross unrealized gains and losses, and estimated fair value of the Company’s available-for-sale securities by security type were as follows:
		Amortized			Gross			Gross			Estimated
		Cost			Unrealized			Unrealized			Fair
					Gain			Loss			Value
	As of September 30, 2013
	Fixed-maturity securities
	U.S. Treasury and U.S. government agencies	$	4,669			129			(1	)		4,797
	Corporate bonds		16,591			430			(56	)		16,965
	Commercial mortgage-backed securities		10,816			546			(83	)		11,279
	State, municipalities, and political subdivisions		27,503			848			(77	)		28,274
	Redeemable preferred stock		780			7			(9	)		778
	Total		60,359			1,960			(226	)		62,093
	Equity securities		11,834			595			(458	)		11,971
	Total available-for-sale securities	$	72,193			2,555			(684	)		74,064
	As of December 31, 2012
	Fixed-maturity securities
	U.S. Treasury and U.S. government agencies	$	1,359			88			—			1,447
	Corporate bonds		10,298			572			(10	)		10,860
	Commercial mortgage-backed securities		10,708			936			—			11,644
	State, municipalities, and political subdivisions		10,152			914			—			11,066
	Redeemable preferred stock		919			18			(1	)		936
	Total		33,436			2,528			(11	)		35,953
	Equity securities		8,756			303			(183	)		8,876
	Total available-for-sale securities	$	42,192			2,831			(194	)		44,829
Scheduled Maturities of Fixed-Maturity Securities	'
	The scheduled maturities of fixed-maturity securities at September 30, 2013 are as follows:
		Amortized			Estimated
		Cost			Fair Value
	Available-for-sale
	Due in one year or less	$	1,799			1,814
	Due after one year through five years		9,709			10,002
	Due after five years through ten years		28,777			29,476
	Due after ten years		9,258			9,522
	Commercial mortgage-backed securities		10,816			11,279
		$	60,359			62,093
Summary of Proceeds Received and Gross Realized Gains and Losses from Sales of Available for Sale Securities	'
	Proceeds received, and the gross realized gains and losses from sales of available-for-sale securities, for the three and nine months ended September 30, 2013 and 2012 were as follows:
		Proceeds			Gross			Gross
					Realized			Realized
					Gains			Losses
	Three months ended September 30, 2013
	Fixed-maturity securities	$	390			58			(1	)
	Equity securities	$	708			20			(46	)
	Three months ended September 30, 2012
	Fixed-maturity securities	$	2,517			1			(4	)
	Equity securities	$	551			30			(31	)
	Nine months ended September 30, 2013
	Fixed-maturity securities	$	1,749			92			(4	)
	Equity securities	$	2,021			84			(129	)
	Nine months ended September 30, 2012
	Fixed-maturity securities	$	4,936			41			(7	)
	Equity securities	$	2,063			38			(46	)
Summary of Securities with Gross Unrealized Loss Positions Aggregated by Investment Category	'
	Securities with gross unrealized loss positions at September 30, 2013, aggregated by investment category and length of time the individual securities have been in a continuous loss position, are as follows:
		Less Than Twelve						Twelve Months or					Total
		Months						Greater
	As of September 30, 2013	Gross			Estimated			Gross			Estimated		Gross			Estimated
		Unrealized			Fair			Unrealized			Fair		Unrealized			Fair
		Loss			Value			Loss			Value		Loss			Value
	Fixed-maturity securities
	U.S. Treasury and U.S. government agencies	$	(1	)		311			—			—		(1	)		311
	Corporate bonds		(56	)		3,579			—			—		(56	)		3,579
	Commercial mortgage-backed securities		(82	)		2,205			—			—		(82	)		2,205
	State, municipalities, and political subdivisions		(77	)		1,799			—			—		(77	)		1,799
	Redeemable preferred stock		(10	)		435			—			3		(10	)		438
	Total fixed-maturity securities		(226	)		8,329			—			3		(226	)		8,332
	Equity securities		(361	)		7,700			(97	)		230		(458	)		7,930
	Total available-for-sale securities	$	(587	)		16,029			(97	)		233		(684	)		16,262
Summary of Other Invested Assets	'
	Other investments consist of the following as of September 30, 2013 and December 31, 2012:
		September 30,			December 31,
		2013			2012
	Land	$	11,299			10,993
	Land improvements		1,351			1,326
	Buildings		3,020			2,869
	Other		1,414			1,238
	Total, at cost		17,084			16,426
	Less: accumulated depreciation and amortization		(626	)		(339	)
	Other investments	$	16,458			16,087

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Available-for-Sale Securities Measured at Fair Value	'
	The following table presents information about the Company’s financial assets measured at estimated fair value on a recurring basis and the estimated fair value of long-term debt that is reflected in the financial statements at carrying value. The table indicates the fair value hierarchy of the valuation techniques utilized by the Company to determine such fair value as of September 30, 2013 and December 31, 2012:
		Fair Value Measurements Using
		(Level 1)		(Level 2)		(Level 3)		Total
	As of September 30, 2013
	Financial Assets:
	Cash and cash equivalents	$	273,878		—		—		273,878
	Fixed-maturity securities:
	U.S. Treasury and U.S. government agencies		3,630		1,167		—		4,797
	Corporate bonds		16,004		961		—		16,965
	Commercial mortgage-backed securities		—		11,279		—		11,279
	State, municipalities, and political subdivisions		—		28,274		—		28,274
	Redeemable preferred stock		778		—		—		778
	Total fixed-maturity securities		20,412		41,681		—		62,093
	Equity securities		11,971		—		—		11,971
	Total available-for-sale securities		32,383		41,681		—		74,064
	Total	$	306,261		41,681		—		347,942
	Financial Liabilities:
	Long-term debt	$	—		42,279		—		42,279
	Long-term debt represents the Company’s 8.00% senior notes due 2020. The senior notes were initially sold to the public in January 2013 and trade on the New York Stock Exchange. The estimated fair value is based on the closing market price.
		Fair Value Measurements Using
		(Level 1)		(Level 2)		(Level 3)		Total
	As of December 31, 2012
	Financial Assets:
	Cash and cash equivalents	$	230,214		—		—		230,214
	Fixed-maturity securities:
	U.S. Treasury and U.S. government agencies		583		864		—		1,447
	Corporate bonds		10,860		—		—		10,860
	Commercial mortgage-backed securities		—		11,644		—		11,644
	State, municipalities, and political subdivisions		—		11,066		—		11,066
	Redeemable preferred stock		936		—		—		936
	Total fixed-maturity securities		12,379		23,574		—		35,953
	Equity securities		8,876		—		—		8,876
	Total available-for-sale securities		21,255		23,574		—		44,829
	Total	$	251,469		23,574		—		275,043

Reinsurance_Tables

Reinsurance (Tables)	9 Months Ended
	Sep. 30, 2013
Insurance [Abstract]	'
Impact of Catastrophe Excess of Loss Reinsurance Treaties on Premiums Written and Earned	'
	The impact of the catastrophe excess of loss reinsurance treaties on premiums written and earned is as follows:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Premiums Written:
	Direct	$	78,140			53,676			281,912			175,518
	Assumed		(221	)		(150	)		(2,297	)		(1,770	)
	Gross written		77,919			53,526			279,615			173,748
	Ceded		(28,310	)		(22,506	)		(74,923	)		(53,475	)
	Net premiums written	$	49,609			31,020			204,692			120,273
	Premiums Earned:
	Direct	$	75,512			46,048			193,465			119,219
	Assumed		5,732			7,061			52,278			42,360
	Gross earned		81,244			53,109			245,743			161,579
	Ceded		(28,310	)		(22,506	)		(74,923	)		(53,475	)
	Net premiums earned	$	52,934			30,603			170,820			108,104

Losses_and_Loss_Adjustment_Exp1

Losses and Loss Adjustment Expenses (Tables)	9 Months Ended
	Sep. 30, 2013
Insurance [Abstract]	'
Liability for Losses and Loss Adjustment Expenses	'
	Activity in the liability for unpaid losses and loss adjustment expenses is summarized as follows:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Balance, beginning of period	$	44,749			37,313			41,168			27,424
	Incurred related to:
	Current period		14,851			16,787			50,213			51,188
	Prior period		(362	)		(1,770	)		(2,438	)		(806	)
	Total incurred		14,489			15,017			47,775			50,382
	Paid related to:
	Current period		(12,628	)		(11,867	)		(25,880	)		(24,949	)
	Prior period		(3,086	)		(1,737	)		(19,539	)		(14,131	)
	Total paid		(15,714	)		(13,604	)		(45,419	)		(39,080	)
	Balance, end of period	$	43,524			38,726			43,524			38,726

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Summary of Numerator and Denominator of Basic and Fully Diluted Earnings Per Common Share	'
	A summary of the numerator and denominator of the basic and diluted earnings per common share is presented below:
		Three Months Ended							Three Months Ended
		September 30, 2013							September 30, 2012
		Income			Shares		Per Share		Income			Shares		Per Share
		(Numerator)			(Denominator)		Amount		(Numerator)			(Denominator)		Amount
	Net income	$	13,378						$	2,826
	Less: Preferred stock dividends		(22	)						(42	)
	Less: Income attributable to participating securities		(823	)						(18	)
	Basic Earnings Per Share:
	Income allocated to common stockholders		12,533			10,749	$	1.17		2,766			9,238	$	0.3
	Effect of Dilutive Securities:
	Stock options		—			164				—			222
	Convertible preferred stock		22			165				42			441
	Warrants		—			—				—			584
	Diluted Earnings Per Share:
	Income available to common stockholders and assumed conversions	$	12,555			11,078	$	1.13	$	2,808			10,485	$	0.27
		Nine Months Ended							Nine Months Ended
		September 30, 2013							September 30, 2012
		Income			Shares		Per Share		Income			Shares		Per Share
		(Numerator)			(Denominator)		Amount		(Numerator)			(Denominator)		Amount
	Net income	$	50,000						$	17,056
	Less: Preferred stock dividends		(88	)						(286	)
	Less: Income attributable to participating securities		(2,205	)						(171	)
	Basic Earnings Per Share:
	Income allocated to common stockholders		47,707			10,696	$	4.46		16,599			7,968	$	2.08
	Effect of Dilutive Securities:
	Stock options		—			162				—			230
	Convertible preferred stock		88			195				286			783
	Warrants		—			—				—			453
	Diluted Earnings Per Share:
	Income available to common stockholders and assumed conversions	$	47,795			11,053	$	4.32	$	16,885			9,434	$	1.79

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Summary of the Activity in the Company's Stock Option Plan	'
	A summary of the activity in the Company’s 2007 Plan for the three and nine months ended September 30, 2013 and 2012 is as follows (option amounts not in thousands):
							Weighted
					Weighted		Average
					Average		Remaining			Aggregate
		Number of			Exercise		Contractual			Intrinsic
		Options			Price		Term			Value
	Outstanding at January 1, 2013		280,000		$	2.91		4.9 years		$	5,007
	Outstanding at March 31, 2013		280,000			2.91		4.7 years		$	6,816
	Outstanding at June 30, 2013		280,000			2.91		4.4 years		$	7,788
	Outstanding at September 30, 2013		280,000			2.91		4.2 years		$	10,621
	Exercisable at September 30, 2013		270,000		$	2.78		4.0 years		$	10,276
	Outstanding at January 1, 2012		620,000		$	2.97		5.7 years		$	3,122
	Exercised		(217,003	)		3.33
	Outstanding at March 31, 2012		402,997			2.78		5.5 years		$	3,997
	Outstanding at June 30, 2012		402,997			2.78		5.3 years		$	5,971
	Exercised		(10,000	)		2.5
	Outstanding at September 30, 2012		392,997			2.79		5.0 years		$	8,139
	Exercisable at September 30, 2012		372,997		$	2.6		4.8 years		$	7,795
Information about Options Exercised	'
	The following table summarizes information about options exercised for the three and nine months ended September 30, 2013 and 2012 (option amounts not in thousands):
		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2013			2012		2013			2012
	Options exercised		—			10,000		—			227,003
	Total intrinsic value of exercised options		—		$	182		—		$	1,652
	Fair value of vested stock options		—			—	$	17		$	22
	Tax benefits realized		—		$	8		—		$	445
Information with Respect to Unvested Restricted Stock Awards Stock Option and Incentive Plan	'
	Information with respect to the activity of unvested restricted stock awards during the three and nine months ended September 30, 2013 and 2012 is as follows (share amounts not in thousands):
		Number of			Weighted
		Restricted			Average
		Stock			Grant Date
		Awards			Fair Value
	Nonvested at January 1, 2013		246,320		$	14.54
	Forfeited		(920	)
	Nonvested at March 31, 2013		245,400		$	14.51
	Granted		544,000		$	26.58
	Vested		(29,000	)
	Forfeited		(28,160	)
	Nonvested at June 30, 2013		732,240		$	23.53
	Granted		20,000		$	32.85
	Vested		(56,000	)
	Forfeited		(180	)
	Nonvested at September 30, 2013		696,060		$	24.75
	Nonvested at January 1, 2012		—			—
	Nonvested at March 31, 2012		—			—
	Granted		200,000		$	12.91
	Nonvested at June 30, 2012		200,000		$	12.91
	Nonvested at September 30, 2012		200,000		$	12.91
Information about Deferred Tax Benefits Recognized Related to Restricted Stock Awards and the Fair Value of Vested Restricted Stock	'
	The following table summarizes information about deferred tax benefits recognized related to restricted stock awards and the fair value of vested restricted stock for the three and nine months ended September 30, 2013 and 2012:
		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2013			2012		2013			2012
	Deferred tax benefits recognized	$	748		$	118	$	1,313		$	177
	Fair value of vested restricted stock	$	648		$	—	$	1,027		$	—
Assumptions Used to Determine the Fair Value of the Awards with Market-Based	'
	The following presents assumptions used in a Monte Carlo simulation model to determine the fair value of the awards with market-based conditions:
		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2013			2012		2013			2012
	Expected dividends per share	$	0.9			—	$	0.9		$	0.8
	Expected volatility		41.5 – 48.7	%		—		41.5 – 51.6	%		36.7 – 50.0	%
	Risk-free interest rate		0.0 – 1.1	%		—		0.0 – 1.1	%		0.1 – 1.2	%
	Estimated cost of capital		9.9	%		—		9.3 – 9.9	%		11.9 – 12.1	%
	Expected life (in years)		4			—		4.00 – 6.00			6

Investments_Summary_of_Amortiz

Investments - Summary of Amortized Cost, Gross Unrealized Gains and Losses, and Estimated Fair Value Available-for-Sale Securities (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Total available-for-sale securities, amortized cost	$72,193	$42,192
Debt securities	62,093	35,953
Total available-for-sale securities, gross unrealized gain	2,555	2,831
Total available-for-sale securities, gross unrealized loss	-684	-194
Equity securities	11,971	8,876
Total available-for-sale securities	74,064	44,829
Fixed-Maturity Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	60,359	33,436
Gross Unrealized Gain	1,960	2,528
Gross Unrealized Loss	-226	-11
Debt securities	62,093	35,953
Fixed-Maturity Securities [Member] | U.S. Treasury and U.S. Government Agencies [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	4,669	1,359
Gross Unrealized Gain	129	88
Gross Unrealized Loss	-1	'
Debt securities	4,797	1,447
Fixed-Maturity Securities [Member] | Corporate Bonds [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	16,591	10,298
Gross Unrealized Gain	430	572
Gross Unrealized Loss	-56	-10
Debt securities	16,965	10,860
Fixed-Maturity Securities [Member] | Commercial Mortgage-Backed Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	10,816	10,708
Gross Unrealized Gain	546	936
Gross Unrealized Loss	-83	'
Debt securities	11,279	11,644
Fixed-Maturity Securities [Member] | State, Municipalities, and Political Subdivisions [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	27,503	10,152
Gross Unrealized Gain	848	914
Gross Unrealized Loss	-77	'
Debt securities	28,274	11,066
Fixed-Maturity Securities [Member] | Redeemable Preferred Stock [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	780	919
Gross Unrealized Gain	7	18
Gross Unrealized Loss	-9	-1
Debt securities	778	936
Equity Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Equity securities, amortized cost	11,834	8,756
Equity securities, gross unrealized gain	595	303
Equity securities, gross unrealized loss	-458	-183
Equity securities	$11,971	$8,876

Investments_Scheduled_Maturiti

Investments - Scheduled Maturities of Fixed-Maturity Securities (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Available-for-sale	'	'
Due in one year or less, Amortized Cost	$1,799	'
Due after one year through five years, Amortized Cost	9,709	'
Due after five years through ten years, Amortized Cost	28,777	'
Due after ten years, Amortized Cost	9,258	'
Commercial mortgage-backed securities, Amortized Cost	10,816	'
Amortized Cost Total	60,359	'
Due in one year or less, Fair Value	1,814	'
Due after one year through five years, Fair Value	10,002	'
Due after five years through ten years, Fair Value	29,476	'
Due after ten years, Fair Value	9,522	'
Commercial mortgage-backed securities, Fair Value	11,279	'
Fair Value Total	$62,093	$35,953

Investments_Summary_of_Proceed

Investments - Summary of Proceeds Received and Gross Realized Gains and Losses from Sales of Available for Sale Securities (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Fixed-Maturity Securities [Member]	'	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'
Proceeds	$390	$2,517	$1,749	$4,936
Gross Realized Gains	58	1	92	41
Gross Realized Losses	-1	-4	-4	-7
Equity Securities [Member]	'	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'
Proceeds	708	551	2,021	2,063
Gross Realized Gains	20	30	84	38
Gross Realized Losses	($46)	($31)	($129)	($46)

Investments_Summary_of_Securit

Investments - Summary of Securities with Gross Unrealized Loss Positions Aggregated by Investment Category (Detail) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'
Gross Unrealized Loss, Less than Twelve Months	($587)
Fair Value, Less than Twelve Months	16,029
Gross Unrealized Loss, Twelve Months or Greater	-97
Fair Value, Twelve Months or Greater	233
Gross Unrealized Loss, Total	-684
Fair Value, Total	16,262
Fixed-Maturity Securities [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Gross Unrealized Loss, Less than Twelve Months	-226
Fair Value, Less than Twelve Months	8,329
Fair Value, Twelve Months or Greater	3
Gross Unrealized Loss, Total	-226
Fair Value, Total	8,332
Fixed-Maturity Securities [Member] | U.S. Treasury and U.S. Government Agencies [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Gross Unrealized Loss, Less than Twelve Months	-1
Fair Value, Less than Twelve Months	311
Gross Unrealized Loss, Total	-1
Fair Value, Total	311
Fixed-Maturity Securities [Member] | Corporate Bonds [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Gross Unrealized Loss, Less than Twelve Months	-56
Fair Value, Less than Twelve Months	3,579
Gross Unrealized Loss, Total	-56
Fair Value, Total	3,579
Fixed-Maturity Securities [Member] | Commercial Mortgage-Backed Securities [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Gross Unrealized Loss, Less than Twelve Months	-82
Fair Value, Less than Twelve Months	2,205
Gross Unrealized Loss, Total	-82
Fair Value, Total	2,205
Fixed-Maturity Securities [Member] | State, Municipalities, and Political Subdivisions [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Gross Unrealized Loss, Less than Twelve Months	-77
Fair Value, Less than Twelve Months	1,799
Gross Unrealized Loss, Total	-77
Fair Value, Total	1,799
Fixed-Maturity Securities [Member] | Redeemable Preferred Stock [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Gross Unrealized Loss, Less than Twelve Months	-10
Fair Value, Less than Twelve Months	435
Fair Value, Twelve Months or Greater	3
Gross Unrealized Loss, Total	-10
Fair Value, Total	438
Equity Securities [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Gross Unrealized Loss, Less than Twelve Months	-361
Fair Value, Less than Twelve Months	7,700
Gross Unrealized Loss, Twelve Months or Greater	-97
Fair Value, Twelve Months or Greater	230
Gross Unrealized Loss, Total	-458
Fair Value, Total	$7,930

Investments_Summary_of_Other_I

Investments - Summary of Other Invested Assets (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Real Estate [Abstract]	'	'
Land	$11,299	$10,993
Land improvements	1,351	1,326
Buildings	3,020	2,869
Other	1,414	1,238
Total, at cost	17,084	16,426
Less: accumulated depreciation and amortization	-626	-339
Other investments	$16,458	$16,087

Investments_Additional_Informa

Investments - Additional Information (Detail) (Real Estate Investment [Member], USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Real Estate Investment [Member]	'	'	'	'
Schedule of Investments [Line Items]	'	'	'	'
Depreciation and amortization expenses under other investments	$99	$91	$290	$186

Property_and_Equipment_Net_Add

Property and Equipment, Net - Additional Information (Detail) (USD $)	Feb. 28, 2013
In Thousands, unless otherwise specified	sqft
	acre
Property Plant And Equipment [Abstract]	'
Total purchase price of property	$2,002
Area of land	1.6
Rentable area of office building	16,000

LongTerm_Debt_Additional_Infor

Long-Term Debt - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2013	Sep. 30, 2013	Sep. 30, 2013	Jan. 25, 2013	Jan. 17, 2013
Debt Instrument [Line Items]	'	'	'	'	'
Aggregate principal amount	'	'	'	$5,250	$35,000
Underwriting and issuance costs	1,560	'	1,525	'	'
Prospectus supplement date	'	'	10-Jan-13	'	'
Quarterly payments dates, one	'	'	'January 30	'	'
Quarterly payments dates, two	'	'	'April 30	'	'
Quarterly payments dates, three	'	'	'July 30	'	'
Quarterly payments dates, four	'	'	'October 30	'	'
Quarterly payment start date	'	'	30-Apr-13	'	'
Notes redemption date	'	'	30-Jan-16	'	'
Redemption price as percentage of principal amount redeemed	'	'	100.00%	'	'
Interest expense with respect to the senior notes	'	847	2,379	'	'
Amortization of debt issuance costs	'	42	116	'	'
Maximum [Member]	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'
Notice period for redemption of Notes	'	'	'60 days	'	'
Minimum [Member]	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'
Notice period for redemption of Notes	'	'	'30 days	'	'
Unsecured Senior Note [Member]	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'
Net proceeds after underwriting and issuance costs	38,690	'	'	'	'
Maturity date of notes	'	'	30-Jan-20	'	'
Fixed annual rate of interest	'	'	'	'	8.00%
Interest expense with respect to the senior notes	'	$847	$2,379	'	'
Effective interest rate	'	8.70%	8.70%	'	'

Fair_Value_Measurements_Availa

Fair Value Measurements - Available-for-Sale Securities Measured at Fair Value (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financial Assets:	'	'
Total fixed-maturity securities	$62,093	$35,953
Equity securities	11,971	8,876
Total available-for-sale securities	74,064	44,829
Fair Value, Measurements, Recurring [Member]	'	'
Financial Assets:	'	'
Cash and cash equivalents	273,878	230,214
Total available-for-sale securities	74,064	44,829
Total	347,942	275,043
Financial Liabilities:	'	'
Long-term debt	42,279	'
Fair Value, Measurements, Recurring [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	62,093	35,953
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]	'	'
Financial Assets:	'	'
Equity securities	11,971	8,876
Fair Value, Measurements, Recurring [Member] | U.S. Treasury and U.S. Government Agencies [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	4,797	1,447
Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	16,965	10,860
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage-Backed Securities [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	11,279	11,644
Fair Value, Measurements, Recurring [Member] | State, Municipalities, and Political Subdivisions [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	28,274	11,066
Fair Value, Measurements, Recurring [Member] | Redeemable Preferred Stock [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	778	936
Fair Value, Measurements, Recurring [Member] | (Level 1) [Member]	'	'
Financial Assets:	'	'
Cash and cash equivalents	273,878	230,214
Total available-for-sale securities	32,383	21,255
Total	306,261	251,469
Fair Value, Measurements, Recurring [Member] | (Level 1) [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	20,412	12,379
Fair Value, Measurements, Recurring [Member] | (Level 1) [Member] | Equity Securities [Member]	'	'
Financial Assets:	'	'
Equity securities	11,971	8,876
Fair Value, Measurements, Recurring [Member] | (Level 1) [Member] | U.S. Treasury and U.S. Government Agencies [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	3,630	583
Fair Value, Measurements, Recurring [Member] | (Level 1) [Member] | Corporate Bonds [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	16,004	10,860
Fair Value, Measurements, Recurring [Member] | (Level 1) [Member] | Redeemable Preferred Stock [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	778	936
Fair Value, Measurements, Recurring [Member] | (Level 2) [Member]	'	'
Financial Assets:	'	'
Total available-for-sale securities	41,681	23,574
Total	41,681	23,574
Financial Liabilities:	'	'
Long-term debt	42,279	'
Fair Value, Measurements, Recurring [Member] | (Level 2) [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	41,681	23,574
Fair Value, Measurements, Recurring [Member] | (Level 2) [Member] | U.S. Treasury and U.S. Government Agencies [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	1,167	864
Fair Value, Measurements, Recurring [Member] | (Level 2) [Member] | Corporate Bonds [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	961	'
Fair Value, Measurements, Recurring [Member] | (Level 2) [Member] | Commercial Mortgage-Backed Securities [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	11,279	11,644
Fair Value, Measurements, Recurring [Member] | (Level 2) [Member] | State, Municipalities, and Political Subdivisions [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	28,274	11,066
Fair Value, Measurements, Recurring [Member] | (Level 3) [Member]	'	'
Financial Assets:	'	'
Cash and cash equivalents	'	'
Total available-for-sale securities	'	'
Total	'	'
Financial Liabilities:	'	'
Long-term debt	'	'
Fair Value, Measurements, Recurring [Member] | (Level 3) [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	'	'
Fair Value, Measurements, Recurring [Member] | (Level 3) [Member] | Equity Securities [Member]	'	'
Financial Assets:	'	'
Equity securities	'	'
Fair Value, Measurements, Recurring [Member] | (Level 3) [Member] | U.S. Treasury and U.S. Government Agencies [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	'	'
Fair Value, Measurements, Recurring [Member] | (Level 3) [Member] | Corporate Bonds [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	'	'
Fair Value, Measurements, Recurring [Member] | (Level 3) [Member] | Commercial Mortgage-Backed Securities [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	'	'
Fair Value, Measurements, Recurring [Member] | (Level 3) [Member] | State, Municipalities, and Political Subdivisions [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	'	'
Fair Value, Measurements, Recurring [Member] | (Level 3) [Member] | Redeemable Preferred Stock [Member] | Fixed-Maturity Securities [Member]	'	'
Financial Assets:	'	'
Total fixed-maturity securities	'	'

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (USD $)	3 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value transfer level 2 from level 1	$10,684,000	$11,066,000
Fair value transfers between Level 1, 2 or 3	$0	'
Senior Notes [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fixed annual rate of interest	8.00%	'

Reinsurance_Impact_of_Catastro

Reinsurance - Impact of Catastrophe Excess of Loss Reinsurance Treaties on Premiums Written and Earned (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Premiums Written:	'	'	'	'
Direct	$78,140	$53,676	$281,912	$175,518
Assumed	-221	-150	-2,297	-1,770
Gross written	77,919	53,526	279,615	173,748
Ceded	-28,310	-22,506	-74,923	-53,475
Net premiums written	49,609	31,020	204,692	120,273
Premiums Earned:	'	'	'	'
Direct	75,512	46,048	193,465	119,219
Assumed	5,732	7,061	52,278	42,360
Gross earned	81,244	53,109	245,743	161,579
Ceded	-28,310	-22,506	-74,923	-53,475
Net premiums earned	$52,934	$30,603	$170,820	$108,104

Reinsurance_Additional_Informa

Reinsurance - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
	Reinsurers	Reinsurers	Reinsurers	Credit Concentration Risk [Member]	Credit Concentration Risk [Member]	Credit Concentration Risk [Member]	Credit Concentration Risk [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]	'	'	'	'	'	'	'
Recoveries pertaining to reinsurance contracts	'	'	'	$0	$0	$0	$0
Number of reinsurers	27	27	31	'	'	'	'
Reinsurance recoverables	0	0	0	'	'	'	'
Credit risk associated with reinsurance receivables	0	0	0	'	'	'	'
Recognized benefit on provisions	$5,484,000	$6,785,000	'	'	'	'	'

Losses_and_Loss_Adjustment_Exp2

Losses and Loss Adjustment Expenses - Liability for Losses and Loss Adjustment Expenses (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Liability For Unpaid Claims And Claims Adjustment Expense Net [Abstract]	'	'	'	'
Balance, beginning of period	$44,749	$37,313	$41,168	$27,424
Incurred related to:	'	'	'	'
Current period	14,851	16,787	50,213	51,188
Prior period	-362	-1,770	-2,438	-806
Total incurred	14,489	15,017	47,775	50,382
Paid related to:	'	'	'	'
Current period	-12,628	-11,867	-25,880	-24,949
Prior period	-3,086	-1,737	-19,539	-14,131
Total paid	-15,714	-13,604	-45,419	-39,080
Balance, end of period	$43,524	$38,726	$43,524	$38,726

Losses_and_Loss_Adjustment_Exp3

Losses and Loss Adjustment Expenses - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013
Liability For Unpaid Claims And Claims Adjustment Expense Net [Abstract]	'	'
Unpaid claims and claims adjustment expense overall favorable development	$362	$2,438

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]	'	'	'	'
Income taxes	$8,266	$2,299	$31,221	$11,459
Estimated effective tax rates	38.20%	44.90%	38.40%	40.20%

Earnings_Per_Share_Summary_of_

Earnings Per Share - Summary of Numerator and Denominator of Basic and Fully Diluted Earnings Per Common Share (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]	'	'	'	'
Net income	$13,378	$2,826	$50,000	$17,056
Less: Preferred stock dividends	-22	-42	-88	-286
Less: Income attributable to participating securities, Income (Numerator)	-823	-18	-2,205	-171
Basic Earnings Per Share:	'	'	'	'
Income allocated to common stockholders, Income (Numerator)	12,533	2,766	47,707	16,599
Income allocated to common stockholders, Shares (Denominator)	10,749	9,238	10,696	7,968
Income allocated to common stockholders, Per-Share Amount	$1.17	$0.30	$4.46	$2.08
Diluted Earnings Per Share:	'	'	'	'
Income available to common stockholders and assumed conversions, Income (Numerator)	12,555	2,808	47,795	16,885
Income available to common stockholders and assumed conversions, Shares (Denominator)	11,078	10,485	11,053	9,434
Income available to common stockholders and assumed conversions, Per-Share Amount	$1.13	$0.27	$4.32	$1.79
Warrants [Member]	'	'	'	'
Effect of Dilutive Securities:	'	'	'	'
Dilutive Securities, Shares (Denominator)	'	584	'	453
Stock Options [Member]	'	'	'	'
Effect of Dilutive Securities:	'	'	'	'
Dilutive Securities, Shares (Denominator)	164	222	162	230
Convertible Preferred Stock [Member]	'	'	'	'
Effect of Dilutive Securities:	'	'	'	'
Dilutive Securities, Income (Numerator)	$22	$42	$88	$286
Dilutive Securities, Shares (Denominator)	165	441	195	783

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail) (USD $)

1 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

1 Months Ended

9 Months Ended

1 Months Ended

9 Months Ended

1 Months Ended

9 Months Ended

Jul. 16, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 17, 2013

Sep. 30, 2013

Sep. 17, 2013

Sep. 30, 2013

Sep. 17, 2013

Sep. 30, 2013

Common Stock [Member]

Series A Preferred Stock [Member]

Series A Preferred Stock [Member]

Series A Preferred Stock [Member]

Series A Preferred Stock [Member]

Series A Preferred Stock [Member]

Series A Preferred Stock [Member]

Series A Preferred Stock [Member]

Series A Preferred Stock [Member]

September [Member]

September [Member]

October [Member]

October [Member]

November [Member]

November [Member]

Class of Stock [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Dividends per common share

$0.23

$0.22

$0.20

$0.68

$0.55

'

'

'

'

'

'

'

'

'

'

Record date of dividend payable

'

'

'

'

'

'

16-Aug-13

'

'

'

1-Oct-13

'

1-Nov-13

'

2-Dec-13

Date of dividend payable

'

'

'

'

'

'

20-Sep-13

'

'

'

28-Oct-13

'

27-Nov-13

'

27-Dec-13

Preferred stock, outstanding

'

0

'

0

'

0

'

149,919

149,919

'

'

'

'

'

'

Shares of Series A Preferred converted

'

'

'

'

'

'

'

41,831

91,263

'

'

'

'

'

'

Declared cash dividend on Series A Preferred shares

'

'

'

'

'

'

'

'

'

$0.06

'

$0.06

'

$0.06

'

StockBased_Compensation_Additi

Stock-Based Compensation - Additional Information (Detail) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

In Thousands, except Share data, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Mar. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Maximum [Member]

Omnibus Incentive Plan New Plan 2012 [Member]

Omnibus Incentive Plan New Plan 2012 [Member]

Combined 2007 Plan and 2012 Plan [Member]

Restricted Stock [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of shares granted

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

Common shares available for grant

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5,000,000

4,391,940

'

Number of restricted shares outstanding

'

'

'

'

'

696,060

200,000

696,060

200,000

732,240

245,400

246,320

200,000

0

0

'

'

608,060

'

Stock options granted, vesting period range

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'5 years

'

'

'

Maximum contractual term under share based compensation plan

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'10 years

'

'

'

Exercise of common stock options, shares

'

10,000

217,003

'

227,003

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Surrender of Shares

'

1,183

'

'

72,592

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Recognized compensation expenses

$5

$5

'

$14

$63

$1,939

$306

$3,404

$459

'

'

'

'

'

'

'

'

'

'

Unrecognized compensation expenses related to nonvested stock options

11

'

'

11

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Recognition of remaining compensation expense over a weighted-average period

'

'

'

'7 months

'

'

'

'29 months

'

'

'

'

'

'

'

'

'

'

'

Total unrecognized compensation expense, Nonvested restricted stock arrangements granted

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

14,078

Tax benefit from restricted stock dividends

'

'

'

$892

$445

$116

'

$199

'

'

'

'

'

'

'

'

'

'

'

StockBased_Compensation_Summar

Stock-Based Compensation - Summary of the Activity in the Company's Stock Option Plan (Detail) (USD $)	3 Months Ended						9 Months Ended		12 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding [Roll Forward]	'	'	'	'	'	'	'	'	'	'
Outstanding Beginning, Number of Options	280,000	280,000	280,000	402,997	402,997	620,000	280,000	620,000	620,000	'
Outstanding, Weighted-Average Remaining Contractual Term	'4 years 2 months 12 days	'4 years 4 months 24 days	'4 years 8 months 12 days	'5 years	'5 years 3 months 18 days	'5 years 6 months	'	'	'4 years 10 months 24 days	'5 years 8 months 12 days
Exercised, Number of stock options	'	'	'	-10,000	'	-217,003	'	-227,003	'	'
Exercisable Ending, Weighted-Average Remaining Contractual Term	'4 years	'	'	'4 years 9 months 18 days	'	'	'	'	'	'
Outstanding Ending, Number of Options	280,000	280,000	280,000	392,997	402,997	402,997	280,000	392,997	280,000	620,000
Outstanding Beginning, Weighted Average Exercise price	$2.91	$2.91	$2.91	$2.78	$2.78	$2.97	$2.91	$2.97	$2.97	'
Exercisable Ending, Number of Options	270,000	'	'	372,997	'	'	270,000	372,997	'	'
Exercised, Weighted-Average Exercise Price	'	'	'	$2.50	'	$3.33	'	'	'	'
Outstanding Ending, Weighted-Average Exercise Price	$2.91	$2.91	$2.91	$2.79	$2.78	$2.78	$2.91	$2.79	$2.91	$2.97
Outstanding Beginning, Aggregate Intrinsic Value	$7,788	$6,816	$5,007	$5,971	$3,997	$3,122	$5,007	$3,122	$3,122	'
Exercisable Ending , Weighted-Average Exercise Price	$2.78	'	'	$2.60	'	'	$2.78	$2.60	'	'
Outstanding Ending, Aggregate Intrinsic Value	10,621	7,788	6,816	8,139	5,971	3,997	10,621	8,139	5,007	3,122
Exercisable Ending, Aggregate Intrinsic Value	$10,276	'	'	$7,795	'	'	$10,276	$7,795	'	'

StockBased_Compensation_Inform

Stock-Based Compensation - Information about Options Exercised (Detail) (USD $)	3 Months Ended			9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Mar. 31, 2012	Sep. 30, 2013	Sep. 30, 2012
Share Based Compensation Arrangement By Share Based Payment Award Options Activity [Abstract]	'	'	'	'	'
Options exercised	'	10,000	217,003	'	227,003
Total intrinsic value of exercised options	'	$182	'	'	$1,652
Fair value of vested stock options	'	'	'	17	22
Tax benefits realized	'	$8	'	'	$445

StockBased_Compensation_Inform1

Stock-Based Compensation - Information with Respect to Unvested Restricted Stock Awards Stock Option and Incentive Plan (Detail) (Restricted Stock [Member], USD $)	3 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2012	Sep. 30, 2012	Dec. 31, 2011
Restricted Stock [Member]	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'
Beginning balance, shares	732,240	245,400	246,320	0	200,000	0
Granted, Number of Restricted Stock Awards	20,000	544,000	'	200,000	'	'
Granted, Weighted-Average Grant Date Fair Value	$32.85	$26.58	'	$12.91	'	'
Vested, Number of Restricted Stock Awards	-56,000	-29,000	'	'	'	'
Forfeited, Number of Restricted Stock Awards	-180	-28,160	-920	'	'	'
Ending balance, shares	696,060	732,240	245,400	200,000	200,000	0
Nonvested, Weighted-Average Grant Date Fair Value	$23.53	$14.51	$14.54	$0	$12.91	$0
Nonvested, Weighted-Average Grant Date Fair Value	$24.75	$23.53	$14.51	$12.91	$12.91	$0

StockBased_Compensation_Inform2

Stock-Based Compensation - Information about Deferred Tax Benefits Recognized Related to Restricted Stock Awards and the Fair Value of Vested Restricted Stock (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Deferred tax benefits recognized	$748	$118	$1,313	$177
Restricted Stock [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Fair value of vested restricted stock	$648	'	$1,027	'

StockBased_Compensation_Assump

Stock-Based Compensation - Assumptions Used to Determine the Fair Value of the Awards with Market-Based (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Share Based Compensation Arrangement by Share Based Payment Award Fair Value Assumptions and Methodology [Line Items]	'	'	'	'
Expected dividends per share	$0.90	'	$0.90	$0.80
Expected volatility, minimum	41.50%	'	41.50%	36.70%
Expected volatility, maximum	48.70%	'	51.60%	50.00%
Risk-free interest rate, minimum	0.00%	'	0.00%	0.10%
Risk-free interest rate, maximum	1.10%	'	1.10%	1.20%
Estimated cost of capital	9.90%	'	'	'
Estimated cost of capital, minimum	'	'	9.30%	11.90%
Estimated cost of capital, maximum	'	'	9.90%	12.10%
Expected life (in years)	'4 years	'	'	'6 years
Minimum [Member]	'	'	'	'
Share Based Compensation Arrangement by Share Based Payment Award Fair Value Assumptions and Methodology [Line Items]	'	'	'	'
Expected life (in years)	'	'	'4 years	'
Maximum [Member]	'	'	'	'
Share Based Compensation Arrangement by Share Based Payment Award Fair Value Assumptions and Methodology [Line Items]	'	'	'	'
Expected life (in years)	'	'	'6 years	'

Defined_Contribution_Plan_Addi

Defined Contribution Plan - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013
Defined Contribution Benefit Plans [Line Items]	'	'
Maximum percentage of employee contribution	'	100.00%
Company contribution in the plan	$67	$67
Maximum [Member]	'	'
Defined Contribution Benefit Plans [Line Items]	'	'
Maximum percentage of employer contribution	'	4.00%

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Detail) (USD $)	9 Months Ended		1 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013	Apr. 30, 2011
		Premium Tax [Member]	Environmental Remediation Expense [Member]
Commitment And Contingencies [Line Items]	'	'	'
Recorded liability, at acquisition	'	'	$150
Total expended with respect to the assessment	115	'	'
Other liabilities, accrued at acquisition, net	35	'	'
Loss contingency amount	'	1,754	'
Proposed premium tax adjustment with interest	'	1,913	'
Accrued amount	'	$0	'
Loss contingency related to credit disallowance	'	'The auditor's proposed adjustments primarily relate to the disallowance of the entire amount of $1,754 in Florida salary credits applicable to that period	'

Related_Party_Transactions_Add

Related Party Transactions - Additional Information (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
	Directors
Moksha [Member]	'
Related Party Transaction [Line Items]	'
Assumed total covered exposure	$15,400
Premiums paid	4,300
No. of non-employee directors	1
Oxbridge [Member]	'
Related Party Transaction [Line Items]	'
Assumed total covered exposure	10,100
Premiums paid	$4,900
No. of non-employee directors	2

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended			1 Months Ended	9 Months Ended			1 Months Ended
In Thousands, except Share data, unless otherwise specified	Jul. 16, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Oct. 17, 2013	Sep. 30, 2013	Nov. 05, 2013	Oct. 18, 2013	Oct. 17, 2013
							Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]
							Purchase_Right		Policies		Series B Preferred Stock [Member]
Subsequent Event [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Dividends per common share	$0.23	$0.22	$0.20	$0.68	$0.55	'	$0.28	'	'	'	'
Date of dividend payable	'	'	'	'	'	'	'	20-Dec-13	'	'	'
Record date of dividend payable	'	'	'	'	'	'	'	15-Nov-13	'	'	'
Distribution of preferred share purchase right	'	'	'	'	'	'	1	'	'	'	'
Common stock, no par value	'	'	'	'	'	'	'	'	'	'	'
Number of shares purchasable per right	'	'	'	'	'	'	'	'	'	'	0.01
Preferred stock, no par value	'	'	'	'	'	'	'	'	'	'	'
Share purchase price per right	'	'	'	'	'	'	'	'	'	'	$125
Common stock ownership percentage for rights to become exercisable	'	'	'	'	'	'	'	'	'	10.00%	'
Rights agreement expiration date	'	'	'	'	'	'	18-Oct-18	'	'	'	'
Number Of Insurance Policies	'	'	'	'	'	'	'	'	35,000	'	'
Additional annualized premium amount	'	'	'	'	'	'	'	'	$78,000	'	'