Stock Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-based Compensation Stock Options Activity [Table Text Block]

The following table presents stock options outstanding during 2012, 2011 and 2010 under these plans (in thousands, except for per share data):



	Number		Weighted- Average Exercise Price	Aggregate Intrinsic Value
Options outstanding at December 31, 2009	3,521,763		$44.58	$	10,359
Options awarded	345,945		48.30
Options exercised	(486,280	)	39.29
Options forfeited	(97,443	)	46.89
Options expired	(148,651	)	51.35
Options outstanding at December 31, 2010	3,135,334		$45.62	$	24,405
Options awarded	185,007		55.94
Options exercised	(576,518	)	44.35
Options forfeited	(60,005	)	47.93
Options expired	(62,471	)	54.13
Options outstanding at December 31, 2011	2,621,347		$47.01	$	20,769
Options awarded	67,155		58.76
Options exercised	(708,295	)	45.32
Options forfeited	(22,559	)	50.36
Options expired	(66,862	)	45.97
Options outstanding at December 31, 2012	1,890,786		$48.29	$	11,748
Options vested at:
December 31, 2010	805,781		$45.26	$	6,556
December 31, 2011	825,682		46.72	6,779
December 31, 2012	601,367		47.99	3,890

Outstanding and Vested Stock Options [Table Text Block]

The following table summarizes information concerning currently outstanding and vested stock options:



Options Outstanding				Options Vested
		Weighted				Weighted
		Average	Weighted		Weighted	Average
Range of		Remaining	Average		Average	Remaining
Exercise	Number	Contractual	Exercise	Number	Exercise	Contractual
Prices	Outstanding	Life (years)	Price	Vested	Price	Life (years)
$30.87	426	0.01	$30.87	426	$30.87	0.01
37.74	25,338	1.00	37.74	25,338	37.74	1.00
45.15 - 47.34	77,569	1.04	47.32	77,569	47.32	1.04
47.05	160,902	2.00	47.05	90,785	47.05	1.03
54.33	297,887	2.50	54.33	144,360	54.33	1.04
48.46	387,385	3.00	48.46	133,184	48.46	1.05
36.65	371,373	3.50	36.65	77,788	36.65	1.04
48.30	208,365	4.00	48.30	13,468	48.30	1.57
55.94	273,792	5.00	55.94	38,449	55.94	2.07
58.76	87,749	6.00	58.76	—	0.00	0.00

Assumptions used in the determination of fair value of stock options awarded [Table Text Block]

The fair value of options was determined as of the date of grant using a Black-Scholes option pricing model with the following weighted average assumptions:



	2012			2011			2010
Average risk-free interest rate¹	0.93		%	1.87		%	2.36		%
Dividend yield	2.20		%	1.80		%	2.00		%
Volatility factors	0.280			0.268			0.261
Weighted average expected life	4.9 years			4.9 years			4.9 years
Weighted average fair value	$	11.48		$	11.92		$	10.17


¹	Average risk-free interest rate represents U.S. Treasury rates matched to the expected life of the options.

Schedule of Nonvested Share Activity [Table Text Block]

The following represents a summary of the non-vested stock awards as of December 31, 2012 (in thousands):



	Shares		Weighted Average Grant Date Fair Value
Non-vested at January 1, 2012	503,738
Granted	197,058		$55.63
Lapsed	(76,192	)	47.32
Forfeited	(31,773	)	50.45
Non-vested at December 31, 2012	592,831

Schedule of Subsequent Year Grant [Table Text Block]

During January 2013, BOK Financial awarded the following stock-based compensation:



	Number	Exercise Price	Fair Value / Award
Stock options	81,492	$55.74	$9.67
Non-vested stock	208,770	0.00	55.74