Stock Options and Other Equity-Based Incentive Instruments - Stock Option Activity (Detail)	9 Months Ended
	Sep. 30, 2023 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding at beginning of period (in shares) | shares	15,500
Options granted (in shares) | shares	0
Options exercised (in shares) | shares	(8,000)
Options forfeited (in shares) | shares	0
Options outstanding at end of period (in shares) | shares	7,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price at beginning of period (in USD per share) | $ / shares	$ 21.27
Weighted Average Exercise Price of Options Granted (in USD per share) | $ / shares	0
Weighted Average Exercise Price of Options Exercised (in USD per share) | $ / shares	19.46
Weighted Average Exercise Price of Options Forfeited (in USD per share) | $ / shares	0
Weighted Average Exercise Price at end of period (in USD per share) | $ / shares	$ 23.21