XML 81 R70.htm IDEA: XBRL DOCUMENT v3.23.2
Summary of Activities in Shares of Capital Stock (Details) - shares
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Common Class A [Member]    
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]    
Common stock, shares, outstanding, beginning 18,758,031 17,642,722
Exercise of stock options 127,688 69,096
Vesting of restricted stock units 405
Stock dividends 949,675 889,554
Conversion of Class C to Class A 57,901 77,316
Common stock, shares, outstanding, ending 19,893,700 18,678,688
Common Class C [Member]    
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]    
Common stock, shares, outstanding, beginning 2,889,859 2,866,565
Exercise of stock options
Vesting of restricted stock units
Stock dividends 141,594 139,462
Conversion of Class C to Class A (57,901) (77,316)
Common stock, shares, outstanding, ending 2,973,552 2,928,711