Common Stock (Tables)

3 Months Ended

Mar. 31, 2019

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)	2019		2018
Basic income per common share:
Net income attributable to Commerce Bancshares, Inc.	$	97,138	$	100,984
Less preferred stock dividends	2,250		2,250
Net income available to common shareholders	94,888		98,734
Less income allocated to nonvested restricted stock	944		1,121
Net income allocated to common stock	$	93,944	$	97,613
Weighted average common shares outstanding	110,011		110,916
Basic income per common share	$	.85	$	.88
Diluted income per common share:
Net income available to common shareholders	$	94,888	$	98,734
Less income allocated to nonvested restricted stock	943		1,118
Net income allocated to common stock	$	93,945	$	97,616
Weighted average common shares outstanding	110,011		110,916
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	290		348
Weighted average diluted common shares outstanding	110,301		111,264
Diluted income per common share	$	.85	$	.88