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, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Earnings Per Share [Abstract]
Net earnings per share, basic, Net Earnings	$ 52,485	$ 50,873	$ 105,882	$ 103,441
Effect of stock options and stock grants, Net Earnings	0	0	0	0
Net earnings per share, diluted, Net Earnings	$ 52,485	$ 50,873	$ 105,882	$ 103,441
Net earnings per share, basic, Weighted Average Shares	142,814,363	142,700,905	142,769,518	142,683,322
Effect of stock options and stock grants, Weighted Average Shares	274,567	386,650	297,675	344,181
Net earnings per share, diluted, Weighted Average Shares	143,088,930	143,087,555	143,067,193	143,027,503
Net earnings per share, basic, Per Share Amount	$ 0.37	$ 0.36	$ 0.74	$ 0.72
Effect of stock options and stock grants, Per Share Amount	0	0	0	0
Net earnings per share, diluted, Per Share Amount	$ 0.37	$ 0.36	$ 0.74	$ 0.72