) The amortization of intangible assets is calculated using the straight-line method, over the estimated useful life of the asset. NotE 11-Goodwill a) The detail of this item is as follows: Opening Balance Net Impairment Losses Recognized in Equity 31.12.2010 31.12.2009 01.01.2009 ThCLP$ ThCLP$ ThCLP$ Impairment Losses Recognized in Profit and Loss Final Balance, net Opening Balance Net Impairment Losses Recognized in Equity Impairment Losses Recognized in Profit and Loss Final Balance, net Opening Balance Net Impairment Losses Recognized in Equity Impairment Losses Recognized in Profit and Loss Goodwill Inv. Interrentas 24,170,173 (697,722) 23,472,451 25,217,196 - 1,047,023 24,170,173 25,217,196 - - 25,217,196 Goodwill Inv. <strong>Banco</strong>, Dresdner 2,224,741 - 2,224,741 2,224,741 - - 2,224,741 2,224,741 - - 2,224,741 Goodwill Inv, Copper 13,112,972 - 13,112,972 13,112,972 - - 13,112,972 13,112,972 - - 13,112,972 Goodwill Inv. Factoring - - - 180,097 - 180,097 - 180,097 - - 180,097 Goodwill Inv. <strong>Banco</strong> <strong>Security</strong> - - - 124,090 - 124,090 - 124,090 - - 124,090 Goodwill Inv. Corredora Dresdner - - - 101,865 - 101,865 - 101,867 - - 101,867 Goodwill Vida <strong>Security</strong> 2,099,306 - 2,099,306 2,099,306 - - 2,099,306 2,099,306 - - 2,099,306 Goodwill Seg.Generales Previsión 862,415 - 862,415 862,415 - - 862,415 862,415 - - 862,415 Goodwill Inversion Travel 1,098,615 - 1,098,615 1,098,615 - - 1,098,615 1,181,741 - (83,126) 1,098,615 Total 43,568,222 (697,722) - 42,870,500 45,021,297 - 1,453,075 43,568,222 45,104,423 - 83,126 45,021,299 Final Balance, net NotE 12- Trade and Other Accounts Receivable The total trade and other accounts receivable (net of provisions) of Grupo <strong>Security</strong> as of December 31, 2010 amounts to ThCLP$2,196,578,756. Grupo <strong>Security</strong> has an allowance for doubtful accounts policy, which is determined based on a rating scheme of its risk portfolio, which uses components related to the behavior of clients and its debtors, allowing associating such provision to the industry trends. Before a new client is accepted, Grupo <strong>Security</strong> uses an external credit points system to assess the potential quality of the client’s credit and to define the credit limits of the client. The limits and points allocated to the clients are reviewed periodically. Grupo <strong>Security</strong> does not maintain any guarantees over such balances.
149 <strong>PA</strong>GE As of December 31, 2010, this item includes the following: Balance Balance Balance 31.12.2010 31.12.2009 01.01.2009 ThCLP$ ThCLP$ ThCLP$ Bank Subsidiary Owed by banks 11,356,392 312,446,740 93,490,130 Commercial loans 1,519,400,526 1,505,519,919 1,662,059,056 Mortgage loans 300,440,978 245,255,107 214,300,571 Consumer loans 107,438,753 85,690,192 78,434,819 Brokerage debtors 70,210,324 26,429,826 11,135,210 Other accounts receivable from clients 2,590 Vida <strong>Security</strong> - Notes and accounts receivable 3,184,137 2,573,427 2,222,380 Lease receivable 33,767,748 27,762,025 23,804,372 Other receivables 7,134,744 4,137,164 5,119,184 Other Subsidiaries Invoices receivable 10,021,118 8,258,619 10,244,086 Notes and accounts receivable 129,881,498 125,144,113 132,279,592 Leases receivable 2,133,069 2,512,687 4,474,136 Other receivables 1,609,469 2,330,391 12,139,023 2,196,578,756 2,348,060,210 2,249,705,149