Description Of Business And Significant Accounting Policies (Accounts Receivable) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
accounts receivable	$ 1,285	$ 1,608
Revenue [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
accounts receivable	1,253	1,517
Joint Interest [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
accounts receivable	32	65
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
accounts receivable		$ 26