PROPERTY AND EQUIPMENT

The major categories of property and equipment and related accumulated depletion, depreciation, amortization and impairment as of December 31, 2013 and 2012 are as follows:



	December 31,
	2013			2012
	(In thousands)
Oil and natural gas properties	$	2,477,178		$	1,611,090
Office furniture and fixtures	6,093			4,476
Building	4,626			3,926
Land	412			260
Total property and equipment	2,488,309			1,619,752
Accumulated depletion, depreciation, amortization and impairment	(784,717		)	(665,884		)
Property and equipment, net	$	1,703,592		$	953,868

No impairment of oil and natural gas properties was required under the ceiling test for the years ended December 31, 2013, 2012 or 2011.

Included in oil and natural gas properties at December 31, 2013 and 2012 is the cumulative capitalization of $47.5 million and $32.6 million in general and administrative costs incurred and capitalized to the full cost pool. General and administrative costs capitalized to the full cost pool represent management’s estimate of costs incurred directly related to exploration and development activities such as geological and other administrative costs associated with overseeing the exploration and development activities. All general and administrative costs not directly associated with exploration and development activities were charged to expense as they were incurred. Capitalized general and administrative costs were approximately $14.9 million, $9.1 million and $5.4 million for the years ended December 31, 2013, 2012 and 2011, respectively.

The following is a summary of Gulfport’s oil and gas properties not subject to amortization as of December 31, 2013:



	Costs Incurred in
	2013		2012		2011		Prior to 2011		Total
	(in thousands)
Acquisition costs	$	342,857	$	493,981	$	106,704	$	1,068	$	944,610
Exploration costs	—		—		—		—		—
Development costs	—		—		—		—		—
Capitalized interest	5,980		—		—		—		5,980
Total oil and gas properties not subject to amortization	$	348,837	$	493,981	$	106,704	$	1,068	$	950,590

The following table summarizes the Company’s non-producing properties excluded from amortization by area at December 31, 2013:



	December 31, 2013
	(In thousands)
Colorado	$	6,054
Bakken	295
Southern Louisiana	542
Ohio	943,654
Other	45
	$	950,590

At December 31, 2012, approximately $626.3 million of non-producing leasehold costs was not subject to amortization.

During the year ended December 31, 2012, the Company determined that further development of its non-producing leasehold assets located in Belize was not in alignment with its current strategic operating plan, and therefore, recognized a loss on disposal of assets, net of tax, of approximately $3.5 million which is included in discontinued operations on the accompanying consolidated statements of operations for the year ended December 31, 2012.

The Company evaluates the costs excluded from its amortization calculation at least annually. Subject to industry conditions and the level of the Company’s activities, the inclusion of most of the above referenced costs into the Company’s amortization calculation is expected to occur within three to five years.

A reconciliation of the Company's asset retirement obligation for the years ended December 31, 2013 and 2012 is as follows:



	December 31,
	2013			2012
	(In thousands)
Asset retirement obligation, beginning of period	$	13,275		$	12,653
Liabilities incurred	3,556			2,195
Liabilities settled	(2,465		)	(2,271		)
Accretion expense	717			698
Asset retirement obligation as of end of period	15,083			13,275
Less current portion	795			60
Asset retirement obligation, long-term	$	14,288		$	13,215

On May 7, 2012, the Company entered into a contribution agreement with Diamondback. Under the terms of the contribution agreement, the Company agreed to contribute to Diamondback, prior to the closing of the Diamondback initial public offering (“Diamondback IPO”), all its oil and natural gas interests in the Permian Basin (the "Contribution"). The Contribution was completed on October 11, 2012. At the closing of the Contribution, Diamondback issued to the Company (i) 7,914,036 shares of Diamondback common stock and (ii) a promissory note for $63.6 million, which was repaid to the Company at the closing of the Diamondback IPO on October 17, 2012. This aggregate consideration was subject to a post-closing cash adjustment based on changes in the working capital, long-term debt and certain other items of Diamondback O&G LLC, formerly Windsor Permian LLC ("Diamondback O&G"), as of the date of the Contribution. In January 2013, the Company received an additional payment from Diamondback of approximately $18.6 million as a result of this post-closing adjustment. Diamondback O&G is a wholly-owned subsidiary of Diamondback. Under the contribution agreement, the Company is generally responsible for all liabilities and obligations with respect to the contributed properties arising prior to the Contribution and Diamondback is responsible for such liabilities and obligations with respect to the contributed properties arising after the Contribution.

In accordance with the Company's policy under the full cost method of accounting to only recognize a gain or loss upon the disposal of oil and natural gas properties if such dispositions significantly alter the relationship between capitalized costs and proven oil and natural gas reserves, the Company recognized a gain on the sale of its Permian Basin assets of approximately $7.3 million, which is included in the accompanying consolidated statements of operations for the year ended December 31, 2012. In addition, the Company recorded a reduction to its full cost pool of approximately $213.0 million as a result of the Contribution.

In connection with the Contribution, the Company and Diamondback entered into an investor rights agreement under which the Company has the right, for so long as it beneficially owns more than 10% of Diamondback’s outstanding common stock, to designate one individual as a nominee to serve on Diamondback’s board of directors. Such nominee, if elected to Diamondback’s board, will also serve on each committee of the board so long as he or she satisfies the independence and other requirements for service on the applicable committee of the board. So long as the Company has the right to designate a nominee to Diamondback’s board and there is no Gulfport nominee actually serving as a Diamondback director, the Company has the right to appoint one individual as an advisor to the board who shall be entitled to attend board and committee meetings. The Company is also entitled to certain information rights and Diamondback granted the Company certain demand and “piggyback” registration rights obligating Diamondback to register with the SEC any shares of Diamondback common stock that the Company owns. Immediately upon completion of the Contribution, the Company owned a 35% equity interest in Diamondback, rather than leasehold interests in the Company’s Permian Basin acreage. Upon completion of the Diamondback IPO in October 2012, Gulfport owned approximately 21.4% of Diamondback's outstanding common stock. As of December 31, 2013, Gulfport owned approximately 7.2% of Diamondback's outstanding common stock. Following the Contribution, the Company has accounted for its interest in Diamondback as an equity investment. See Note 5, "Equity Investments - Diamondback Energy, Inc."