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Earnings per Share - Computation of Earnings Per Share (Detail) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings Per Share [Abstract]
Net income	$ 117,390	$ 125,419	$ 117,655
Average number of common shares outstanding (in shares)	33,261	32,584	29,721
Effect of dilutive stock options and restricted stock (in shares)	94	137	161
Average number of common shares outstanding used to calculate diluted earnings per share (in shares)	33,355	32,721	29,882
Equity awards excluded from diluted earnings per share because their effect was antidilutive (in shares)	0	0	0

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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