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Employee Benefits	9 Months Ended
Employee Benefits	Sep. 30, 2011
Compensation And Retirment Disclosure [Abstract]
Employee Benefits	(6) Employee Benefits BOK Financial has sponsored a defined benefit Pension Plan for all employees who satisfied certain age and service requirements. Pension Plan benefits were curtailed as of April 1, 2006. The Company recognized periodic pension expense of $965 thousand and $778 thousand for the three months ended September 30, 2011 and 2010, respectively and $2.9 million and $2.3 million for the nine months ended September 30, 2011 and 2010, respectively. The Company made no Pension Plan contributions during the nine months ended September 30, 2011 and 2010. Management has been advised that the maximum allowable contribution for 2011 is $28 million. No minimum contribution is required for 2011.

The entire disclosure for pension and other postretirement benefits.

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