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Operations and Summary of Significant Accounting Policies - Reconciliation of Denominators of Basic and Diluted EPS Calculations (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Numerator:      
Net earnings $ 219,345 $ 172,640 $ 159,407
Denominator:      
Weighted-average shares used to compute basic EPS (in shares) 35,011 35,117 35,538
Dilutive RSUs, net of tax effect (in shares) 399 327 421
The convertible senior notes (in shares) 1,453 0 0
Diluted (in shares) 36,863 35,444 35,959
Net earnings per share:      
Basic (in dollars per share) $ 6.27 $ 4.92 $ 4.49
Diluted (in dollars per share) $ 5.95 $ 4.87 $ 4.43