We reported $50.5 million net revenue from GEOs in the first quarter of 2021, compared to $25.2 million or $0.21 million per diluted share in the first quarter of 2020. For the first quarter of 2021, we reported total revenue of $576.4 million compared with $605.0 million for the first quarter of 2020. The results from the first quarter of the year reflect a $13.3 million gain in real estate assets, pre-tax, $3.0 million gain in extinction of debt, pre-tax and a tax benefit of $0.1 million from net income adjustment attributable to GEO. With the exclusion of those items, in the first quarter of 2021 adjusted net revenue for the second quarter of 2020 was 34.1 million dollars, or 0.28 dollars per diluted share, compared with 28.8 million, or 0.24 dollars per diluted share. Events
The normalized Operations Funds ("Normalized FFO") for the first quarter of 2021 amounted to 53.1 million dollars or 0.44 dollars per diluted share, up from 47.2 million dollars or 0.39 dollars for each diluted share, over the first quarter of 2020. We reported $72.2 million in adjusted funds from business operations ("AFFO"), or $0.60 per diluted share, compared to $66.6 million for the first quarter of 2020, or $0.55 per diluted share.
"With the ongoing operational and financial challenges of COVID-19, we remain pleased with the performance of our diversified business units," says George C. Zoley, Chairman and Chief Executive Officer of GEO. We believe that our business remains stable and is supported by long-term immovable assets and contracts involving essential government services. We recognize that heightened policy rhetoric has raised concerns about future access to funding, and recent federal policy measures have led to some of our contracts not being renewed. To address these challenges, we focus on debt reduction, debt deleveraging and domestic financing growth that we believe is in the best interests of our shareholders in addressing our maturities and improving long-term shareholder value."."
Developments Recent
On 26 January 2021, President Biden signed an Executive Order not to renew, in compliance with applicable law (the Executive Order) contracts with the US Department of Justice ("DOJ") for private criminal detention facilities. Our services are used by two DOJ agencies, the Federal Prison Bureau ("BOP") and US Marshal Service ("USMS"). The BOP houses prisoners convicted of federal crimes and the USMS generally has responsibility for prisoners waiting for trial or sentencing in U.S. federal courts.
As we had previously stated, the BOP had already decided before the signing of the Executive Order that it would not renew contracts for three of our secure services, one of which expired by the end of January 2021 and the other at the end of March 2021. BOP has informed us in the first quarter of 2021 that the contract for our Great Plains Correctional Facility in Oklahoma will not be renewed after the current term of the contract expires on 31 May 2021. We were also informed that BOP decided to terminate its agreement with the county-owned and running Reeves County Detention Center I & II effective 10 May 2021 and that our management consultancy agreement with Reeves County, Texas, was also concluded for this facility. Our remaining safe service contracts with BOP are not expected to be renewed if current contract periods expire between the end of November 2021 and the end of September 2022. Our secure service contracts with BOP accounted for approximately 12% of our total revenues for three months ended 31 March 2021.
Contrary to the BOP, the USMS does not own and operate its holdings. The USMS contracts for the use of facilities that are usually located near the federal courthouses mainly through intergovernmental contracts for service and, to a lesser extent, direct contracts. We cooperate with the USMS to evaluate different alternatives for compliance with the Executive Order. In the first quarter of 2021, the USMS informed us not to renew the contract for the Queens Detention Facility of our New York company which ended on 31 March 2021. We currently operate 4 additional detention centers under direct contracts and 8 detention centres, under intergovernmental agreements with the USMS. In the next few years, the four direct contracts will be renewed at different times, two of them in late 2021. Direct contracts and intergovernmental agreements with the USMS represented approximately 15 percent of our total revenue for the three months ended 31 March 2021.
President Biden's administration may implement additional executive orders or directives relating to federal criminal justice and immigration policies that may impact on the use of public-private partnerships in relation to corrections and detention needs by the Federal Government, including our contracts and/or may affect the federal agencies' budget and spending priorities
For the entire year 2021, we updated our financial guidance and issued our financial guidance for the second quarter of 2021. Our updated guidance continues throughout 2021 to support a slow recovery from the COVID-19 pandemic. Our updated guidance reflects the earlier announced expiration in the first quarter of 2021 of three of our secure services contracts with BOP and the termination of our management consulting with Reeves County, Texas. Our guidance also reflects our earlier expectations that the BOP will not renew its three additional secure services contracts when their current contract option periods expire in 2021.
Our 2021 guidance reflects only the previously announced non-renovation of the contract for our New York Queens Detainment Facility, which expired on March 31, 2021, and will continue to monitor President Biden's executive order's scope and execution timeline. This non-renewal is partly offset by the launch by late 2020 of the three California ICE Annex facilities and our Texas Eagle Pass Detainment Facility, which will be normalized in 2021.
For the entire year 2021, the net revenue attributable to GEO is expected to reach between 141 million and 150 million dollars. We expect revenues of around $2.23 billion to $2.25 billion in the full year of 2021. We expect the Adjusted EBITDA of around $395 million to $406 million for the full year 2021. It is anticipated that the total year 2021 Adjusted Net Income per diluted share will be between $1.02 and $1.10, and the full year of 2021 AFFO per diluted share will be between $2.23 and $2.31.
We expect the net revenue attributable to GEO to be between 35 million and 38 million dollars in the second quarter of 2021. We expect revenues in the second quarter of 2021 to be between $558 million and $563 million. We expect AFFO in the second quarter of 2021 to be between $0.57 and $0.59 for each diluted share.