Dallas Mavericks owner Mark Cuban has been fined $500,000 for "public criticism and detrimental conduct regarding NBA officiating," the league office announced Friday.

The NBA also denied the Mavs' protest of their loss to the Atlanta Hawks on Feb. 22, after which Cuban confronted the referees on the court and criticized them on Twitter and while speaking to reporters.

The NBA said in a statement that Cuban's comments were "highly critical, personal and demeaning to the league and its officiating staff" and that he continued to publicly criticize the officiating over the following days.

"It is a recognized part of sports for fans and the media at times to criticize officiating, but team executives must be held to a higher standard," the NBA said. "A team owner's effort to influence refereeing decisions during and after a game creates the perception of an unfair competitive advantage and thereby undermines the integrity of the game.

"Demeaning league employees also creates an intimidating workplace environment. With an increased focus on respectful conduct by coaches, players and fans during games, the actions of team executives should set an example and not lower expectations for appropriate behavior in our arenas."

The league noted that Cuban's postgame confrontation with the referees marked the second time he had walked on to the court to challenge a call during the game.

Cuban has been a longtime critic of NBA officiating and its management -- accumulating more than $3 million in fines -- but this is the first time Cuban has been so public in his attacks of league management since he had to pay a $10 million donation to charity in 2018 after the unearthing of sexual misconduct within the Mavericks organization.

In the game against the Hawks, Cuban was irate that the officials counted a putback by Atlanta's John Collins with 8.4 seconds remaining following a goaltending call that was overturned upon replay review. The decision essentially sealed the Hawks' win over the Mavericks.

"Refs have bad games," Cuban tweeted. "Crews have bad games. But this isn't a single game issue. This is the same s--- that has been going on for 20 years. Hire former refs who think they know how to hire, train and manage. Realize 2 years later they can't. Repeat."

Commissioner Adam Silver determined there was no misapplication of playing rules on Collins' putback, which was the grounds of the Mavs' protest.

"The Replay Center Official correctly understood the rules to require that Collins' basket count if he was in the act of shooting when the goaltending call was made," the NBA said in the statement. "The Replay Center Official also correctly followed the established process of replay review.

"The league's investigation included an analysis of the game footage showing that the whistle began to sound one-fifteenth of a second before Collins gained possession of the ball. However, it is well-established by prior NBA protest decisions that a factual determination by game officials -- including replay officials -- that is shown in a post-game review to be incorrect is not a misapplication of the playing rules.

"While officials strive to get every call right, games cannot be replayed when, after the fact and free from the need to make rulings in real time, a different judgment about events on the playing floor can be made. For these reasons, Commissioner Silver found that the extraordinary remedy of granting a game protest and replaying the last portion of a completed game was not warranted."

The NBA statement listed several actions that the league has taken to "enhance its officiating program through improved management, training, transparency, and technology," noting that these steps were made in part due to input from team executives including Cuban.

"Officiating is one of the toughest jobs in sports," the final paragraph of the statement read. "While officials remain accountable for their on-court performance, maintaining competitive fairness and the integrity of the game is a fundamental obligation of the league office, team owners and personnel, and players.

ESPN NBA Senior Insider Adrian Wojnarowski contributed to this report.