Earnings Per Share - Summary of Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Basic:
Net income (loss) allocable to common stockholders	$ 62,621	$ 7,821	$ 57,688
Weighted average common shares outstanding	15,486,928	15,531,712	16,212,429
Weighted average vested restricted stock units	2,442	4,060	1,620
Weighted average shares	15,489,370	15,535,772	16,214,049
Basic earnings (losses) per common share	$ 4.04	$ 0.50	$ 3.56
Diluted:
Net income (loss) allocable to common stockholders	$ 62,621	$ 7,821	$ 57,688
Weighted average common shares outstanding for:
Basic earnings per common share	15,489,370	15,535,772	16,214,049
Dilutive effects of the assumed redemption of RSUs	108,049	72,448	129,056
Average shares and dilutive potential common shares	15,671,674	15,648,842	16,437,906
Diluted earnings (losses) per common share	$ 4.00	$ 0.50	$ 3.51
ESPP [Member]
Weighted average common shares outstanding for:
Dilutive effects of the assumed exercise	1,495	2,670	1,908
Stock Options [Member]
Weighted average common shares outstanding for:
Dilutive effects of the assumed exercise	72,760	37,952	92,893