Presented below is a summary of the components used to calculate basic and diluted income per share. The Company applies the two-class method of computing income per share, as nonvested share-based awards that contain nonforfeitable rights to dividends are considered securities which participate in undistributed earnings with common stock. The two-class method requires the calculation of separate income per share amounts for the nonvested share-based awards and for common stock. Income per share attributable to common stock is shown in the table below. Nonvested share-based awards are further discussed in Note 12.



	For the Three Months Ended June 30				For the Six Months Ended June 30
(In thousands, except per share data)	2015		2014		2015		2014
Basic income per common share:
Net income attributable to Commerce Bancshares, Inc.	$	74,353	$	66,531	$	135,408	$	130,844
Less preferred stock dividends	2,250		—		4,500		—
Net income available to common shareholders	72,103		66,531		130,908		130,844
Less income allocated to nonvested restricted stock	997		856		1,793		1,658
Net income allocated to common stock	$	71,106	$	65,675	$	129,115	$	129,186
Weighted average common shares outstanding	94,380		98,206		94,832		98,855
Basic income per common share	$	.75	$	.67	$	1.36	$	1.31
Diluted income per common share:
Net income available to common shareholders	$	72,103	$	66,531	$	130,908	$	130,844
Less income allocated to nonvested restricted stock	995		854		1,789		1,653
Net income allocated to common stock	$	71,108	$	65,677	$	129,119	$	129,191
Weighted average common shares outstanding	94,380		98,206		94,832		98,855
Net effect of the assumed exercise of stock-based awards - based on
the treasury stock method using the average market price for the respective periods	322		403		311		423
Weighted average diluted common shares outstanding	94,702		98,609		95,143		99,278
Diluted income per common share	$	.75	$	.66	$	1.36	$	1.30