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Summary of Activities in Shares of Capital Stock (Details) - shares
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Common Class A [Member]    
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]    
Outstanding shares, beginning [1] 22,321,559 [2] 22,119,436
Exercise of stock options 66,273 63,512
Vesting of restricted stock units 6,639 1,325
Conversion of Class C to Class A 774 266
Outstanding shares, ending [1] 22,395,245 22,184,539
Common Class C [Member]    
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]    
Outstanding shares, beginning [1] 3,492,674 [2] 3,291,271
Exercise of stock options 95,337
Vesting of restricted stock units
Conversion of Class C to Class A (774) (266)
Outstanding shares, ending [1] 3,587,237 3,291,005
[1] Adjusted retroactively for the effect of annual stock dividends
[2] Issued and outstanding shares have been adjusted retroactively for the effect of annual stock dividends.