Net Earnings Per Share ("EPS") - Reconciliation of Denominators of Basic and Diluted EPS Calculations (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator:
Net earnings	$ 56,631	$ 43,168
Denominator:
Weighted average shares used to compute basic EPS (in shares)	34,974	35,199
Dilutive potential common shares due to dilutive RSUs, net of tax effect (in shares)	330	461
Weighted average shares used to compute diluted EPS (in shares)	36,981	36,699
Net earnings per share:
Basic (in usd per share)	$ 1.62	$ 1.23
Diluted (in usd per share)	$ 1.53	$ 1.18
Notes
Denominator:
Dilutive potential common shares due to the Notes (in shares)	1,677	1,039