Earnings Per Share - Weighted Average Shares and Share Equivalents Used to Calculate Basic and Diluted Earnings Per Share (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Earnings Per Share [Abstract]
Weighted average number of shares outstanding used to calculate basic EPS (in shares)	3,126,831	3,262,529	3,156,247	3,250,960
Dilutive securities:
Stock options and restricted share units (in shares)	194,823	204,407	198,272	205,446
Weighted average number of shares and share equivalents outstanding used to calculate diluted EPS (in shares)	3,321,654	3,466,936	3,354,519	3,456,406