After a lifetime of chanting "Hook 'Em Horns" at University of Texas games, David Zalman will have to learn to sing "Boomer Sooner," too.

Prosperity Bancshares (PB) in Houston, where Zalman serves as chief executive, has agreed to pay $194 million in cash and stock to acquire Coppermark Bancshares in Oklahoma City. The deal would be the acquisitive company's first foray outside of the Lone Star State - but it's a nearby leap that differs from the precrisis expansions into distant markets that hobbled many banks.

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