Notes Payable and Long-Term Debt (Schedule of Long-Term Debt) (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended			12 Months Ended	0 Months Ended	12 Months Ended		0 Months Ended	12 Months Ended			12 Months Ended		12 Months Ended
	Mar. 19, 2009	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Unsecured Debt [Member]	Dec. 15, 2005 Trust Preferred Security Offering, 2005 [Member]	Dec. 31, 2012 Trust Preferred Security Offering, 2005 [Member]	Dec. 31, 2011 Trust Preferred Security Offering, 2005 [Member]	Jun. 21, 2007 Trust Preferred Security Offering, 2007 [Member]	Dec. 31, 2012 Trust Preferred Security Offering, 2007 [Member]	Dec. 31, 2011 Trust Preferred Security Offering, 2007 [Member]	Dec. 15, 2005 Trust Preferred Security Offering, 2007 [Member]	Dec. 31, 2012 Promissory Note [Member] Unsecured Debt [Member]	Dec. 31, 2011 Promissory Note [Member] Unsecured Debt [Member]	Dec. 31, 2012 Line of Credit [Member] Secured Debt [Member]	Dec. 31, 2011 Line of Credit [Member] Secured Debt [Member]
Debt Instrument [Line Items]
Long-term debt		$ 25,339	$ 12,372			$ 9,279	$ 9,279		$ 3,093	$ 3,093		$ 9,333	$ 0	$ 3,634	$ 0
Percentage bearing variable interest, percentage rate														4.50%
Fixed interest rate					8.83%
Description of variable rate basis	three-month LIBOR			prime	3-month LIBOR			3-month LIBOR						prime
Basis spread on variable rate	3.40%			1.00%	3.75%						3.40%
Payment terms						Interest payments due quarterly.			Interest payments due quarterly.			Annual installment payments.		Interest payments due monthly.