Basis of Presentation (Details Textual) (USD $)	3 Months Ended		9 Months Ended				12 Months Ended			9 Months Ended	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Revolving Credit Facility [Member]	Jan. 27, 2006 Revolving Credit Facility [Member]	Dec. 31, 2011 New Accounting Pronouncement, Early Adoption, Effect [Member]	Dec. 31, 2005 Hallmark Statutory Trust I [Member]	Dec. 31, 2007 Hallmark Statutory Trust I I [Member]	Sep. 30, 2012 Subordinated Debt [Member]	Dec. 31, 2005 Subordinated Debt [Member] Hallmark Statutory Trust I [Member]	Dec. 31, 2007 Subordinated Debt [Member] Hallmark Statutory Trust I I [Member]
Line of Credit Facility, Amount Outstanding					$ 1,500,000	$ 15,000,000
Trust Preferred Securities Fair Value										47,700,000
Trust Preferred Securities Carrying Value										56,700,000
Current Yield To Maturity Percentage			9.20%							8.00%
Proceeds from Issuance of Trust Preferred Securities								30,000,000	25,000,000
Payments to Acquire Trust Preferred Investments											30,900,000	25,800,000
Deferred Policy Acquisition Costs, Period (Increase) Decrease	(927,000)	(353,000)	(3,854,000)	(2,642,000)			900,000
(Increase) Decrease in Deferred Income Taxes							300,000
Stockholders' Equity, Period (Increase) Decrease							$ 600,000