Summary of Significant Accounting Policies - Schedule of Changes in Result of Operations Due to Change in Fiscal Year (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								6 Months Ended		12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2011
Revenues:
Premiums earned									$ 80,637	$ 86,454	$ 199,700	$ 185,644	$ 167,224	$ 173,041
Commission and fee income									14,769	14,341	35,125	32,574	29,911	29,483
Investment income									3,930	4,261	5,716	6,599	8,064	8,395
Net realized gains (losses) on investments, available-for-sale									(232)	(256)	(29)	3,242	(161)	(185)
Total revenues	59,152	59,578	62,493	59,289	55,079	59,568	57,945	55,467	99,104	104,800	240,512	228,059	205,038	210,734
Costs and expenses:
Losses and loss adjustment expenses									65,753	65,395	142,839	148,223	129,525	129,167
Insurance operating expenses									38,154	36,896	82,822	82,127	79,075	77,822
Other operating expenses									494	678	987	922	1,181	1,369
Stock-based compensation									171	365	243	604	804	998
Depreciation and amortization									751	941	2,053	2,203	1,415	1,605
Interest expense									1,980	1,982	1,738	3,025	3,928	3,930
Goodwill impairment									21,090				73,524	52,434
Total costs and expenses									128,393	106,257	230,682	237,104	289,452	267,316
Loss before income taxes	3,363	2,096	2,254	2,117	175	3,378	(4,470)	(8,128)	(29,289)	(1,457)	9,830	(9,045)	(84,414)	(56,582)
Provision for income taxes									148	241	650	(5)	105	198
Net income (loss)	$ 3,158	$ 1,932	$ 2,066	$ 2,024	$ 96	$ 3,279	$ (4,208)	$ (8,207)	$ (29,437)	$ (1,698)	$ 9,180	$ (9,040)	$ (84,519)	$ (56,780)
Basic and diluted net loss per share	$ 0.07	$ 0.05	$ 0.05	$ 0.05	$ 0.00	$ 0.08	$ (0.10)	$ (0.20)	$ (0.62)	$ (0.04)		$ (0.22)	$ (1.76)