Southwest Bancorp, Inc. is a financial holding company. The Company operates in four segments: Oklahoma Banking, Texas Banking, Kansas Banking and Other Operations. The Oklahoma Banking segment provides deposit and lending services and consists of residential mortgage lending services to customers. The Texas Banking segment and the Kansas Banking segment provide deposit and lending services. Other Operations segment includes funds management unit and corporate investments. The Oklahoma Banking segment includes the Stillwater division, the Central Oklahoma division based in Oklahoma City, the Tulsa division, and the Colorado division based in Denver; Texas Banking segment includes the Dallas division, the Fort Worth division, the Austin division and the San Antonio division, and Kansas Banking segment includes the Wichita division and the Hutchinson division. The Stillwater division, Hutchinson division and Denver division serve their respective markets as full-service community banks.