Earnings Per Share - Computation of Basic and Diluted Net Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Numerator:
Net income	$ 340,788	$ 281,389	$ 195,960
Denominator:
Basic weighted average shares outstanding	57,707	57,928	57,885
Diluted weighted average shares outstanding	57,974	58,175	58,191
Earnings per share:
Earnings per share, basic	$ 5.91	$ 4.86	$ 3.39
Earnings per share, diluted	$ 5.88	$ 4.84	$ 3.37
Restricted Stock Units [Member]
Denominator:
Dilutive effect of unvested restricted stock and restricted stock units	267	247	306