Long-Term Debt (Narrative) (Details) (USD $)	12 Months Ended	0 Months Ended
	Dec. 31, 2014	Mar. 27, 2014	Dec. 31, 2013	Mar. 16, 2015	Mar. 15, 2015
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%
F&M Bank [Member]
Line of Credit Facility [Line Items]
Maximum line of credit	$ 40,000,000
Borrowing base	14,300,000
Interest rate per annum	3.75%
Variable interest rate	0.50%
Loans and letters of credit amount outstanding	734,000		3,300,000
F&M Bank [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Credit facility current borrowing capacity				40,000,000
Borrowing base				$ 7,800,000	$ 14,300,000
Variable interest rate		0.50%