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Property and Equipment | 9 Months Ended
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Sep. 30, 2013
Property and Equipment | (7) Property and Equipment Property and equipment consisted of the following (in thousands):
|  | At December 31, 2012 |  |  | At September 30, 2013 |
Computer and other related equipment |  | $ | 15,842 |  |  | $ | 17,947 |
Purchased and internally developed software |  |  | 7,452 |  |  |  | 7,672 |
Furniture and fixtures |  |  | 1,242 |  |  |  | 1,313 |
Leasehold improvements |  |  | 1,809 |  |  |  | 1,831 |
|  | $ | 26,345 |  |  | $ | 28,763 |
Less: accumulated depreciation and amortization |  |  | (20,340 | ) |  |  | (22,796 | )
Property and equipment, net |  | $ | 6,005 |  |  | $ | 5,967 |
The Company has capitalized certain costs of internally developed software for internal use. The estimated useful life of costs capitalized is evaluated for each specific project. Amortization begins in the period in which the software is ready for its intended use. The Company has not capitalized any internally developed costs for the three and nine months ended September 30, 2012 and 2013. Depreciation and amortization expense, related to property and equipment was approximately $823,000 and $868,000 for the three months ended September 30, 2012 and 2013, respectively, and was $2.3 million and $2.6 million for the nine months ended September 30, 2012 and 2013, respectively.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13-14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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