Earnings per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Basic Earnings:
Net income (loss) available to common stockholders	$ (132,477)	$ (1,718,778)	$ 319,675
Basic Earnings:
Shares available to common stockholders (in shares)	275,132,233	173,730,389	132,305,568
Effect of dilutive securities:
Restricted stock awards (in shares)	0	0	12,000
Dilutive Shares (in shares)	275,132,233	173,730,389	132,317,853
Earnings (loss) per share:
Basic (in usd per share)	$ (0.48)	$ (9.89)	$ 2.42
Diluted (in usd per share)	$ (0.48)	$ (9.89)	$ 2.42
Restricted stock awards
Antidilutive Securities Excluded from Computation of Earnings Per Share
Potential common shares excluded from diluted earnings per common share (in shares)	16,061	11,017