Long-Term Debt (Schedule Of Long-Term Debt To Unrelated Entities) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Line of Credit Facility [Line Items]
Note payable to financial institution, with interest only payment until maturity	$ 11,388	$ 11,531
Installment notes bearing interest at the rate of 5.5% to 8.25% per annum collateralized by vehicles with monthly payments including interest, insurance and maintenance of approximately $20,000	232	266
Total long-term debt	11,620	11,797
Less current maturities	(107)	(103)
Long-term debt, less current maturities	11,513	11,694
Periodic payments including interest, insurance and maintenance	$ 20,000
Maximum [Member]
Line of Credit Facility [Line Items]
Interest rate per annum	8.25%
Minimum [Member]
Line of Credit Facility [Line Items]
Interest rate per annum	5.50%