Southwest Bancorp, Inc. Tueday reported a net loss available to common shareholders of ($59.3) million, or ($3.05) per diluted share for the fourth quarter of 2011, compared to net income available to common shareholders of $3.3 million, or $0.17 per diluted share for the fourth quarter of 2010.

The Tulsa based Bank with branches in Hutchinson and South Hutchinson, reported fourth quarter results in 2011 include the pretax loss of ($101.0) million resulting from the sale of nonperforming assets and potential problem loans.

The net loss available to common shareholders for the year ended December 31, 2011 was ($72.5) million, or ($3.73) per diluted share, compared to net income available to common shareholders for the year ended December 31, 2010 of $12.8 million, or $0.71 per diluted share.