Earnings Per Share - Computation of Basic and Diluted Net Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Numerator:
Net income	$ 73,278	$ 67,970	$ 247,187	$ 75,219	$ 64,516	$ 119,296	$ 388,435	$ 259,031
Denominator:
Basic weighted average shares outstanding	55,929			57,825			56,307	57,871
Diluted weighted average shares outstanding	55,964			57,966			56,365	58,056
Earnings per share:
Earnings per share, basic	$ 1.31			$ 1.3			$ 6.9	$ 4.48
Earnings per share, diluted	$ 1.31			$ 1.3			$ 6.89	$ 4.46
Restricted Stock Units [Member]
Denominator:
Dilutive effect of unvested restricted stock and restricted stock units	35			141			58	185