Earnings Per Share - Reconciliation of Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Net income for basic and diluted earnings per share	$ 46,505	$ 102,846	$ 108,285	$ 190,349
Weighted average shares outstanding - basic	32,037	33,651	32,293	33,647
Dilutive effect of restricted stock	256	284	273	303
Weighted average shares outstanding - diluted	32,293	33,935	32,566	33,950
Earnings per share - basic	$ 1.45	$ 3.06	$ 3.35	$ 5.66
Earnings per share - diluted	$ 1.44	$ 3.03	$ 3.33	$ 5.61