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Employee Benefits	6 Months Ended
Employee Benefits	Jun. 30, 2014
Compensation And Retirment Disclosure [Abstract]
Employee Benefits [Text Block]	(7) 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 $149 thousand and $500 thousand for the three months ended June 30, 2014 and 2013, respectively and $297 thousand and $1.0 million for the six months ended June 30, 2014 and 2013, respectively. The Company made no Pension Plan contributions during the three and six months ended June 30, 2014 and 2013. No minimum contribution is required for 2014.