Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Net income	$ 64,147	$ 14,814	$ 75,373	$ 29,346
Weighted average shares outstanding - basic (in shares)	5,128,823	5,125,710	5,127,959	5,125,098
Weighted average shares outstanding - diluted (in shares)	5,128,823	5,125,710	5,127,959	5,125,098
Net income per common share - basic (in usd per share)	$ 12.51	$ 2.89	$ 14.70	$ 5.73
Net income per common share - diluted (in usd per share)	$ 12.51	$ 2.89	$ 14.70	$ 5.73