Common Stock (Tables)

3 Months Ended

Mar. 31, 2020

Common Stock [Abstract]

Summary Of Components Used To Calculate Basic And Diluted Income Per Share

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 13.

	For the Three Months Ended March 31
(In thousands, except per share data)	2020		2019
Basic income per common share:
Net income attributable to Commerce Bancshares, Inc.	$	51,857	$	97,138
Less preferred stock dividends	2,250		2,250
Net income available to common shareholders	49,607		94,888
Less income allocated to nonvested restricted stock	470		944
Net income allocated to common stock	$	49,137	$	93,944
Weighted average common shares outstanding	111,118		115,511
Basic income per common share	$	.44	$	.81
Diluted income per common share:
Net income available to common shareholders	$	49,607	$	94,888
Less income allocated to nonvested restricted stock	469		943
Net income allocated to common stock	$	49,138	$	93,945
Weighted average common shares outstanding	111,118		115,511
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	258		305
Weighted average diluted common shares outstanding	111,376		115,816
Diluted income per common share	$	.44	$	.81