Net income per common share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income	$ 215,300	$ 36,702	$ (66,131)	$ 4,893	$ 294,811	$ 113,940	$ 185,871	$ 413,644
Less: Preferred Stock dividends	0			0			(652)	0
Net income available to common stockholders	$ 215,300			$ 4,893			$ 185,219	$ 413,644
Weighted-average common shares outstanding:
Basic (in shares)	37,459			18,455			36,472	17,646
Dilutive preferred stock (in shares)	0			0			777	0
Diluted (in shares)	37,580			18,569			37,370	17,740
Net income per common share:
Basic (in dollars per share)	$ 5.75			$ 0.27			$ 5.08	$ 23.44
Diluted (in dollars per share)	$ 5.73			$ 0.26			$ 4.97	$ 23.32
Restricted stock awards
Weighted-average common shares outstanding:
Dilutive non-vested stock and performance share awards (in shares)	102			112			108	93
Net income per common share:
Anti-dilutive weighted-average common shares outstanding	396			270			104	268
Performance share awards
Weighted-average common shares outstanding:
Dilutive non-vested stock and performance share awards (in shares)	19			2			13	1