Regional casino operator Pinnacle Entertainment reversed a net loss in the second quarter, crediting results from the Las Vegas-based company’s Midwest properties. Pinnacle, which announced this month it was selling the land and buildings associated with 14 of the company’s casinos to a real estate investment trust in a $4.1 billion transaction, reported a net income Thursday of $15.8 million, or 34 cents per share for the quarter that ended June 30. A year ago, Pinnacle lost $2.3 million, or 4 cents per share.