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Employee Benefits
6 Months Ended
Jun. 30, 2012
Compensation And Retirment Disclosure [Abstract]  
Employee Benefits
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 $1.0 million and $1.2 million for the three months ended June 30, 2012 and 2011, respectively, and $1.9 million for each of the six months ended June 30, 2012 and 2011.  The Company made no Pension Plan contributions during the six months ended June 30, 2012 and 2011.

Management has been advised that the maximum allowable contribution for 2012 is $28 million.  No minimum contribution is required for 2012.