Summary of Significant Accounting Policies - Computation of Basic EPS to Dilutive EPS (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Net earnings per share, basic, Net Earnings	$ 55,308	$ 49,556	$ 161,190	$ 152,997
Effect of stock options and stock grants, Net Earnings	0	0	0	0
Net earnings per share, diluted, Net Earnings	$ 55,308	$ 49,556	$ 161,190	$ 152,997
Net earnings per share, basic, Weighted Average Shares	142,853,215	142,707,260	142,797,621	142,691,389
Effect of stock options and stock grants, Weighted Average Shares	335,642	442,113	362,031	351,469
Net earnings per share, diluted, Weighted Average Shares	143,188,857	143,149,373	143,159,652	143,042,858
Net earnings per share, basic, Per Share Amount	$ 0.39	$ 0.35	$ 1.13	$ 1.07
Effect of stock options and stock grants, Per Share Amount	0		0	0
Net earnings per share, diluted, Per Share Amount	$ 0.39	$ 0.35	$ 1.13	$ 1.07