Earnings Per Share and Equity - Calculations of Net Income Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share Reconciliation [Abstract]
Net income	$ 15,081	$ 20,521	$ 24,344	$ 45,746
Preferred stock dividends	198	198	396	396
Net income applicable to common stockholders	$ 14,883	$ 20,323	$ 23,948	$ 45,350
Weighted average common shares outstanding
Shares used in calculating basic earnings per share	46,519	54,466	47,075	54,664
Stock option	0	489	198	449
Series C Preferred	16,500	16,500	16,500	16,500
Shares used in calculating diluted earnings per share	63,019	71,455	63,773	71,613
Earnings allocated to common stockholders per common share
Basic	$ 0.32	$ 0.37	$ 0.51	$ 0.83
Diluted	$ 0.24	$ 0.28	$ 0.38	$ 0.63