Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt (Narrative) (Details)

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Long-Term Debt (Narrative) (Details) (USD $)
 9 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended
Sep. 30, 2012
Oct. 16, 2012
Oct. 17, 2012
Oct. 09, 2012
May 02, 2012
Dec. 31, 2011
Oct. 31, 2011
May 03, 2011
Dec. 24, 2010
Bank Of Nova Scotia [Member]
Sep. 30, 2010
Bank Of Nova Scotia [Member]
Sep. 30, 2012
Federal Funds Rate [Member]
Sep. 30, 2012
One-Month Euro Dollar Rate [Member]
Sep. 30, 2012
Maximum [Member]
Sep. 30, 2012
Minimum [Member]
Sep. 30, 2012
Euro Dollar Loans [Member]
Oct. 16, 2012
Euro Dollar Loans [Member]
Sep. 30, 2012
Base Rate Loans [Member]
Oct. 16, 2012
Base Rate Loans [Member]
Mar. 31, 2011
Building Loan [Member]
Sep. 30, 2012
Building Loan [Member]
Debt Instrument [Line Items]                                        
Revolving credit facility               $ 350,000,000   $ 100,000,000                    
Borrowing capacity     45,000,000   155,000,000   125,000,000 90,000,000 65,000,000 50,000,000                    
Company's borrowings, outstanding principal amount 141,000,000 [1]            [1]                            
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum                             1.75% 2.00% 0.75% 1.00%    
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum                             2.50% 2.75% 1.50% 1.75%    
Line of Credit Facility, Commitment Fee Percentage 0.50% 0.375%                                    
Loan, periodic monthly payment                                       22,000
Building loan, outstanding amount of building loan refinanced                                     $ 2,400,000  
Stated interest rate, per annum       7.75%                             5.82%  
Debt instrument, basis spread on variable rate                     0.50% 1.00%                
Line of Credit Facility, Interest Rate During Period                       2.98%                
Ratio of funded debt to EBITDAX necessary to maintain covenants                         2.00              
Ratio of EBITDAX to interest expense necessary to maintain covenants                           3.00            
[1] On September 30, 2010, the Company entered into a $100.0 million senior secured revolving credit agreement with The Bank of Nova Scotia, as administrative agent and letter of credit issuer and lead arranger, and Amegy Bank National Association. The revolving credit facility initially matured on September 30, 2013 and had an initial borrowing base availability of $50.0 million, which was increased to $65.0 million effective December 24, 2010. The credit agreement is secured by substantially all of the Company’s assets. The Company’s wholly-owned subsidiaries guaranteed the obligations of the Company under the credit agreement.On May 3, 2011, the Company entered into a first amendment to the revolving credit agreement with The Bank of Nova Scotia, Amegy Bank, Key Bank National Association (“Key Bank”) and Société Générale. Pursuant to the terms of the first amendment, Key Bank and Société Générale were added as additional lenders, the maximum amount of the facility was increased to $350.0 million, the borrowing base was increased to $90.0 million, certain fees and rates payable by the Company under the credit agreement were decreased, and the maturity date was extended until May 3, 2015. On October 31, 2011, the Company entered into additional amendments to its revolving credit facility pursuant to which, among other things, the borrowing base under this facility was increased to $125.0 million. Effective May 2, 2012, the Company entered into additional amendments to its revolving credit facility pursuant to which, among other things, the borrowing base was increased to $155.0 million and Credit Suisse, Deutsche Bank Trust Company Americas and Iberiabank were added as additional lenders and Société Générale left the bank group. As of September 30, 2012, approximately $141,000,000 was outstanding under the revolving credit facility.On October 9, 2012, the Company entered into an amendment to its revolving credit facility that modified certain covenants to permit the offering of its 7.750% Senior Notes due 2012 ("the Note Offering") described in Note 14 below. The Note Offering closed on October 17, 2012 and the Company repaid all indebtedness outstanding under its revolving credit facility on that date with a portion of the proceeds from the Note Offering. Effective as of October 17, 2012, the Company amended its revolving credit facility to lower the applicable rates (i) from a range of 1.00% to 1.75% to a range of 0.75% to 1.50% for the base rate loans and (ii) from a range of 2.00% to 2.75% to a range of 1.75% to 2.50% for the Eurodollar rate loans and letters of credit. This amendment also lowered the commitment fees for Level 1 and Level 2 usage levels, in each case, from 0.50% per annum to 0.375% per annum. Also, effective as of October 17, 2012, in connection with the completion of the Note Offering and the Contribution, the Company's borrowing base under the credit facility was reduced to $45.0 million until the next borrowing base redetermination. Advances under the revolving credit facility, as amended, may be in the form of either base rate loans or eurodollar loans. The interest rate for base rate loans is equal to (1) the applicable rate, which ranges from 0.75% to 1.50%, plus (2) the highest of: (a) the federal funds rate plus 0.5%, (b) the rate of interest in effect for such day as publicly announced from time to time by agent as its “prime rate,” and (c) the eurodollar rate for an interest period of one month plus 1.00%. The interest rate for eurodollar loans is equal to (1) the applicable rate, which ranges from 1.75% to 2.50%, plus (2) the London interbank offered rate that appears on Reuters Screen LIBOR01 Page for deposits in U.S. dollars, or, if such rate is not available, the offered rate on such other page or service that displays the average British Bankers Association Interest Settlement Rate for deposits in U.S. dollars, or, if such rate is not available, the average quotations for three major New York money center banks of whom the agent shall inquire as the “London Interbank Offered Rate” for deposits in U.S. dollars. At September 30, 2012, amounts borrowed under the revolving credit facility bore interest at the eurodollar rate (2.98%).The revolving credit facility contains customary negative covenants including, but not limited to, restrictions on the Company’s and its subsidiaries’ ability to: incur indebtedness; grant liens; pay dividends and make other restricted payments; make investments; make fundamental changes; enter into swap contracts and forward sales contracts; dispose of assets; change the nature of their business; and enter into transactions with their affiliates. The negative covenants are subject to certain exceptions as specified in the credit agreement. The revolving credit facility also contains certain affirmative covenants, including, but not limited to the following financial covenants: (1) the ratio of funded debt to EBITDAX (net income, excluding any non-cash revenue or expense associated with swap contracts resulting from ASC 815, plus without duplication and to the extent deducted from revenues in determining net income, the sum of (a) the aggregate amount of consolidated interest expense for such period, (b) the aggregate amount of income, franchise, capital or similar tax expense (other than ad valorem taxes) for such period, (c) all amounts attributable to depletion, depreciation, amortization and asset or goodwill impairment or writedown for such period, (d) all other non-cash charges, (e) non-cash losses from minority investments, (f) actual cash distributions received from minority investments, (g) to the extent actually reimbursed by insurance, expenses with respect to liability on casualty events or business interruption, and (h) all reasonable transaction expenses related to dispositions and acquisitions of assets, investments and debt and equity offerings, and less non-cash income attributable to equity income from minority investments) for a twelve-month period may not be greater than 2.00 to 1.00; and (2) the ratio of EBITDAX to interest expense for a twelve-month period may not be less than 3.00 to 1.00. The Company was in compliance with these financial covenants at September 30, 2012.