Earnings per Share - Calculation of Earnings per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings per Share
Net income (loss)	$ (13,403)	$ 9,816	$ 352,759	$ 47,234	$ 29,220	$ (48,614)	$ 349,172	$ 27,840
Less: Net income allocated to participating securities	0			2,272			15,771	1,310
Net income (loss) available to common stockholders	$ (13,403)			$ 44,962			$ 333,401	$ 26,530
Common shares:
Common shares outstanding - basic	39,063			38,441			38,911	38,318
Dilutive effect of potential common shares	0			0			0	0
Common shares outstanding - diluted	39,063			38,441			38,911	38,318
Basic	$ (0.34)			$ 1.17			$ 8.57	$ 0.69
Diluted	$ (0.34)			$ 1.17			$ 8.57	$ 0.69