Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Income from continuing operations	$ 57,632	$ 130,582	$ 41,939
Income from discontinued operations (see Note 7)	0	2,348	0
Net income	$ 57,632	$ 132,930	$ 41,939
Weighted average shares outstanding - basic (in shares)	5,126,100	5,123,613	5,120,922
Weighted average shares outstanding - diluted (in shares)	5,126,100	5,123,613	5,120,922
Income from continuing operations, basic (usd per share)	$ 11.24	$ 25.48	$ 8.19
Income from continuing operations, diluted (usd per share)	11.24	25.48	8.19
Income from discontinued operations (see Note 7), basic (usd per share)	0	0.46	0
Income from discontinued operations (see Note 7), diluted (usd per share)	0	0.46	0
Net income per common share, basic (usd per share)	11.24	25.94	8.19
Net income per common share, diluted (in dollars per share)	$ 11.24	$ 25.94	$ 8.19