Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2022

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The net income available to common stockholders and weighted average number of common shares outstanding used to compute basic and diluted earnings per share for each class of common stock are as follows (in thousands, except per share amounts): 

	Three months ended March 31,
	2022		2021
Distributed earnings	$	16,751	$	15,396
Undistributed earnings	14,590		16,932
Net income	$	31,341	$	32,328
Class A common stock:
Basic net income available to common stockholders	$	21,617	$	21,809
Basic weighted average common shares outstanding	28,150		27,317
Basic earnings per share	$	0.77	$	0.80
Diluted net income available to common stockholders	$	21,682	$	21,912
Effect of potential exercise of stock options	273		401
Diluted weighted average common shares outstanding	28,423		27,718
Diluted earnings per share	$	0.76	$	0.79
Class B common stock:
Basic net income available to common stockholders	$	9,724	$	10,519
Basic weighted average common shares outstanding	12,662		13,177
Basic earnings per share	$	0.77	$	0.80
Diluted net income available to common stockholders	$	9,659	$	10,416
Diluted weighted average common shares outstanding	12,662		13,177
Diluted earnings per share	$	0.76	$	0.79