Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Income from continuing operations	$ 130,582	$ 41,939	$ 60,075
Income from discontinued operations (see Note 7)	2,348	0	0
Net income	$ 132,930	$ 41,939	$ 60,075
Weighted average shares outstanding - basic (in shares)	5,123,613	5,120,922	5,118,198
Weighted average shares outstanding - diluted (in shares)	5,123,613	5,120,922	5,118,198
Income from continuing operations, diluted (usd per share)	$ 25.48	$ 8.19	$ 11.74
Income from continuing operations, basic (usd per share)	25.48	8.19	11.74
Income from discontinued operations (see Note 7), diluted (usd per share)	0.46	0	0
Income from discontinued operations (see Note 7), basic (usd per share)	0.46	0	0
Net income per common share, diluted (in dollars per share)	25.94	8.19	11.74
Net income per common share - basic and diluted (in usd per share)	$ 25.94	$ 8.19	$ 11.74