Income Taxes - Component of Income Taxes Expenses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Components of income tax expense (benefit):
Currently payable			$ 200
Deferred income tax expense (benefit)	$ 7,500	$ (2,500)	400
Income tax expense (benefit)	$ 7,479	$ (2,515)	$ 579