Key insight: The merged bank will hold the number-one deposit share in Beaumont, home to a bustling port and some of the nation's largest oil refineries.Expert quote: "By joining forces, we are creating one of the strongest Texas banking franchises, supported by an exceptional deposit base and a shared commitment to relationship-driven community banking." — Stellar Bancorp Chairman and CEO Robert FranklinSupporting data: Prosperity has completed 31 M&A deals since 2000.UPDATE: This story includes additional ...