Earnings per Share - Schedule of Earnings per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share [Abstract]
Net income	$ 87,946	$ 66,648	$ 72,234	$ 58,139	$ 76,410	$ 65,256	$ 67,090	$ (150,173)	$ 284,967	$ 58,583	$ 179,630
Preferred stock dividends									(41)	(41)	(41)
Net income available to common equity									284,926	58,542	179,589
Dividends and undistributed earnings allocated to participating securities									(24)	(26)	(30)
Net income available to common shareholders									$ 284,902	$ 58,516	$ 179,559
Basic weighted-average shares outstanding (in shares)									39,371	39,307	39,232
Stock options and other stock-based awards (in shares)									164	166	175
Diluted weighted-average shares outstanding (in shares)									39,535	39,473	39,407
Antidilutive stock options (in shares)									0	0	0
Earnings per share:
Basic (in dollars per share)	$ 2.23	$ 1.69	$ 1.83	$ 1.48	$ 1.94	$ 1.66	$ 1.71	$ (3.83)	$ 7.24	$ 1.49	$ 4.58
Diluted (in dollars per share)	$ 2.22	$ 1.69	$ 1.83	$ 1.47	$ 1.93	$ 1.65	$ 1.70	$ (3.83)	$ 7.21	$ 1.48	$ 4.56