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, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net earnings per share, basic, Net Earnings	$ 49,556	$ 59,341	$ 152,997	$ 175,807
Effect of stock options and stock grants, Net Earnings	0	0	0	0
Net earnings per share, diluted, Net Earnings	$ 49,556	$ 59,341	$ 152,997	$ 175,807
Net earnings per share, basic, Weighted Average Shares	142,707,260	142,524,500	142,691,389	142,588,373
Effect of stock options and stock grants, Weighted Average Shares	442,113	601,588	351,469	658,395
Net earnings per share, diluted, Weighted Average Shares	143,149,373	143,126,088	143,042,858	143,246,768
Net earnings per share, basic, Per Share Amount	$ 0.35	$ 0.42	$ 1.07	$ 1.23
Effect of stock options and stock grants, Per Share Amount	0	(0.01)	0	0
Net earnings per share, diluted, Per Share Amount	$ 0.35	$ 0.41	$ 1.07	$ 1.23