EARNINGS PER COMMON SHARE - Calculations of Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net Income (Loss):
Net income	$ 70,558	$ 21,256	$ 131,708	$ 23,522
Preferred stock dividends	(669)	(669)	(1,338)	(1,338)
Net income attributable to common stockholders	$ 69,889	$ 20,587	$ 130,370	$ 22,184
Weighted-Average Shares:
Average common shares outstanding	213,574	216,920	215,294	216,853
Average potential dilutive common shares	1,035	650	1,139	589
Average common shares outstanding - assuming dilution	214,609	217,570	216,433	217,442
Earnings per common share:
Basic	$ 0.33	$ 0.09	$ 0.61	$ 0.10
Diluted	$ 0.33	$ 0.09	$ 0.60	$ 0.10