Supplemental Oil And Gas Information (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 item	Dec. 31, 2012 item	Dec. 31, 2011
Average Sales Price and Production Costs Per Unit of Production [Line Items]
Proved undeveloped reserve locations	29	23
future development cost	$ 11,162	$ 7,894	$ 12,611
Barrel Of Oil [Member]
Average Sales Price and Production Costs Per Unit of Production [Line Items]
Price	90.11	88.08	88.53
MCF Of Gas [Member]
Average Sales Price and Production Costs Per Unit of Production [Line Items]
Price	0.00	2.76	4.16
Proved Undeveloped Reserves [Member]
Average Sales Price and Production Costs Per Unit of Production [Line Items]
future development cost	$ 9,600