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Shareholders' Equity (Tables)
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Equity [Abstract]    
Summary of Changes in Shareholders' Equity A summary of changes in shareholders’ equity for the three months ended March 31, 2022 is presented below:
 Common
Stock		Additional
Paid-In
Capital		Retained
Earnings		Treasury
Stock		Deferred
Compensation
Trust		Deferred
Compensation
Liability		Total
Balance, December 31, 2021$206 $2,378,191 $10,047,839 $(9,423,858)$(16,710)$16,710 $3,002,378 
Net income— — 426,100 — — — 426,100 
Purchase of common stock for treasury— — — (748,788)— — (748,788)
Equity-based compensation— 11,668 — — — — 11,668 
Proceeds from Options exercised— 34,241 — — — — 34,241 
Treasury stock issued upon Option exercise and restricted share vesting— (7,440)— 7,440 — — — 
Balance, March 31, 2022$206 $2,416,660 $10,473,939 $(10,165,206)$(16,710)$16,710 $2,725,599 
 A summary of changes in shareholders’ equity for the three months ended March 31, 2021 is presented below:
 Common
Stock		Additional
Paid-In
Capital		Retained
Earnings		Treasury
Stock		Deferred
Compensation
Trust		Deferred
Compensation
Liability		Total
Balance, December 31, 2020$206 $2,214,426 $8,811,120 $(7,922,678)$(16,710)$16,710 $3,103,074 
Net income— — 248,762 — — — 248,762 
Purchase of common stock for treasury— — — (377,425)— — (377,425)
Equity-based compensation— 14,471 — — — — 14,471 
Proceeds from Options exercised— 57,625 — — — — 57,625 
Treasury stock issued upon Option exercise and restricted share vesting— (14,516)— 14,516 — — — 
Balance, March 31, 2021$206 $2,272,006 $9,059,882 $(8,285,587)$(16,710)$16,710 $3,046,507