NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued Unum Group and Subsidiaries Note 3 - Investments - Continued Investment Real Estate Transfers of Financial Assets As of December 31, 2020, the carrying amount of fixed maturity securities loaned to third parties under our securities lending program was $96.6 million, for which we received collateral in the form of cash and securities of $17.6 million and $82.8 million, respectively. As of December 31, 2019, the carrying amount of fixed maturity securities loaned to third parties under our securities lending program was $176.4 million, for which we received collateral in the form of securities of $186.5 million. We had no outstanding repurchase agreements at December 31, 2020 or 2019. Our investment policy also permits us to lend fixed maturity securities to unaffiliated financial institutions in short-term securities lending agreements. These agreements increase our investment income with minimal risk. Our securities lending policy requires that a minimum of 102 percent of the fair value of the securities loaned be maintained as collateral. We may receive cash and/or securities as collateral under these agreements. Cash received as collateral is typically reinvested in short-term investments. If securities are received as collateral, we are not permitted to sell or re-post them. To manage our cash position more efficiently, we may enter into repurchase agreements with unaffiliated financial institutions. We generally use repurchase agreements as a means to finance the purchase of invested assets or for short-term general business purposes until projected cash flows become available from our operations or existing investments. Our repurchase agreements are typically outstanding for less than 30 days. We post collateral through our repurchase agreement transactions whereby the counterparty commits to purchase securities with the agreement to resell them to us at a later, specified date. The fair value of collateral posted is generally 102 percent of the cash received. Our investment real estate balance was $106.3 million and $90.5 million at December 31, 2020 and 2019, respectively, and the associated accumulated depreciation was $97.7 million and $49.8 million at December 31, 2020 and 2019, respectively. For the year ended December 31, 2020, we recognized $36.6 million in impairments related to certain of our real estate held for investment. We did not recognize any impairments on investment real estate during 2019 and we recognized $0.6 million in impairments in 2018. At December 31, 2020, we had commitments of $11.4 million to fund certain commercial mortgage loans. Consistent with how we determine the estimate of current expected credit losses for our funded mortgage loans each period, we estimate expected credit losses for loans that have not been funded but we are committed to fund at the end of each period. At December 31, 2020, we had $0.1 million of expected credit losses related to unfunded commitments on our consolidated balance sheets. For the year ended December 31, 2020, we had no impaired mortgage loans. Our average investment in impaired mortgage loans was $0.6 million, and $2.3 million for the years ended December 31, 2019 and 2018, respectively. We did not recognize any interest income during 2020, 2019 or 2018 on mortgage loans subsequent to impairment. We had no loan foreclosures for the years ended December 31, 2020, 2019, or 2018. September 2018 and the loan was considered impaired as of December 31, 2018. The loan was settled during the first quarter of 2019 resulting in an additional loss of $0.1 million. At December 31, 2020, we held no mortgage loans that were greater than 90 days past due regarding principal and/or interest payments. 155