Net income available to common shareholders for 2005 decreased to $10.6 million from $10.8 million in 2004 primarily as a result of the factors described above.

Liquidity and Capital Resources

During 2006, our capital expenditures of $163.5, net of $38.3 million in proceeds from property sales, exceeded our net cash flows provided by operating activities. For future capital expenditures, we expect to use cash on hand, cash generated by operating activities and available draws on the Senior Credit Facility to partially fund our planned drilling expenditures and fund leasehold costs and geological and geophysical costs on our exploration projects in 2007. We may need to seek other financing alternatives to fully fund our 2007 capital expenditures program, including possible debt or equity financings.

We may not be able to obtain financing needed in the future on terms that would be acceptable to us. If we cannot obtain adequate financing, we may be required to limit or defer our planned oil and natural gas exploration and development program, thereby adversely affecting the recoverability and ultimate value of our oil and natural gas properties.

Our primary sources of liquidity have included funds generated by operations, proceeds from the issuance of various securities, including our common stock, preferred stock and warrants (including our public offering in 2004 and our private placements in 2005 and 2006 of our common stock), and borrowings under our credit facilities. Our liquidity position has been enhanced by the availability of funds under the Senior Credit Facility, the borrowing base of which was increased to $65.0 million, effective November 8, 2006. In addition, we received net proceeds of $33.5 million from the 2006 Private Placement.

In December 2006, we completed an amendment to the Second Lien Credit Facility providing for $75.0 million of additional borrowings which was drawn on January 3, 2007. The Company used a portion of $72.1 million net proceeds to repay the $41.0 million of outstanding borrowings under the Senior Credit Facility. Accordingly, the amended and undrawn borrowing base availability on our Senior Credit Facility was $54.25 million (See "Financing Arrangements—Senior Secured Revolving Credit Facility" for further discussion).

We received $38.3 million in proceeds from property sales in 2006. The sales included properties in both our Gulf Coast and Barnett Shale areas. We may continue to sell properties to fund a portion of our capital expenditures program.

Cash flows provided by operating activities were $65.4 million, $38.8 million and $32.5 million for 2006, 2005 and 2004, respectively. The increase in cash flows provided by operations in 2006 as compared to 2005 was primarily due to higher oil and gas revenues generated from increased production. The increase in cash flows provided by operations in 2005 as compared to 2004 was primarily due to increased revenues attributable to increased production and higher commodity prices.

Estimated maturities of long-term debt are $1.5 million in each of the years 2007 through 2009 and the remainder in 2010. The following table sets forth estimates of our contractual obligations as of December 31, 2006:

 
 
 
 

In addition to the contractual obligations presented above, we are also party to a firm well commitment agreement in the North Sea to drill one well within the next four years. Currently we expect to incur between $4 million and $6 million to drill the well between 2007 and 2010; unless we alternately choose in the future to sell down our interest to another company.

We have planned capital expenditures (excluding capitalized interest) in 2007 of approximately $165.0 million to $175.0 million, of which $143.9 million is expected to be used for drilling activities in our project areas and the balance is expected to be used to fund 3-D seismic surveys and land acquisitions. In 2007, we plan to drill approximately 15 gross wells in the onshore Gulf Coast area and 53 gross wells in our Barnett Shale area and 25 to 30 gross wells in our East Texas areas, primarily in our Camp Hill oil field. The actual number of wells drilled and capital expended is dependent upon our available financing, cash

 
 
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