Notes Payable and Long-Term Debt (Short-Term Debt) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Short-term Debt [Line Items]
Short-term notes payable	$ 1,166	$ 1,866
Unsecured Debt [Member]
Short-term Debt [Line Items]
Line of credit with variable interest rate equal to the WSJ prime rate, subject to a 5.0% floor; Maturity January 2013. Interest payments due quarterly. Unsecured.	0	700
Current portion of installment note payable November 2013 with variable interest rate equal to the WSJ prime rate plus 1%; Unsecured	1,166	1,166
Short-term notes payable	$ 1,166	$ 1,866
Interest rate description	WSJ	WSJ
Interest rate at period end	5.00%	5.00%
Payment terms	Interest payments due quarterly	Interest payments due quarterly
Description of variable rate basis	WSJ	WSJ
Basis spread on variable rate	1.00%	1.00%