Revolving Credit Facility and Notes Payable (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012 Revolving Credit Facility [Member]	Dec. 31, 2011 Revolving Credit Facility [Member]	Jan. 27, 2006 Revolving Credit Facility [Member]	Jul. 01, 2011 Texas Builders Insurance Company and Texas Builders Insurance Company Risk Management [Member]
Line of Credit Facility, Amount Outstanding		$ 1.5	$ 4.1	$ 15.0
Debt Instrument, Description of Variable Rate Basis		Prime rate or LIBOR plus 2.5%.
Debt Instrument, Basis Spread on Variable Rate		2.50%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.25%
Line of Credit Facility, Commitment Fee Percentage	1.00%
Line of Credit Facility, Interest Rate During Period		2.81%
Notes Payable to Bank					$ 1.7