Southwest Bancorp Inc. in Stillwater, Okla., said Monday that it had earned $3.3 million in the first quarter, more than 11 times its year-earlier profit.

The $3.1 billion-asset company said net interest income grew 27%, to $26.8 million, and its provision for loan losses declined 22%, to $8.5 million.

Southwest's net interest margin grew by 59 basis points, to 3.59%. The company exceeded regulatory standards for being considered well-capitalized, with a leverage ratio of 12.32% and a tangible common equity ratio of 7.87%.

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