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Summary of Significant Accounting Policies - Computation of Basic EPS to Dilutive EPS (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Earnings Per Share [Abstract]        
Net earnings per share, basic, Net Earnings $ 60,494 $ 56,379 $ 116,466 $ 113,297
Effect of stock options and stock grants, Net Earnings 0 0 0 0
Net earnings per share, diluted, Net Earnings $ 60,494 $ 56,379 $ 116,466 $ 113,297
Net earnings per share, basic, Weighted Average Shares 142,682,251 142,245,555 142,620,838 142,196,190
Effect of stock options and stock grants, Weighted Average Shares 556,418 919,056 652,553 906,418
Net earnings per share, diluted, Weighted Average Shares 143,238,669 143,164,611 143,273,391 143,102,608
Net earnings per share, basic, Per Share Amount $ 0.42 $ 0.40 $ 0.82 $ 0.80
Effect of stock options and stock grants, Per Share Amount 0 (0.01) (0.01) (0.01)
Net earnings per share, diluted, Per Share Amount $ 0.42 $ 0.39 $ 0.81 $ 0.79