Shareholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Sep. 13, 2016
Equity [Abstract]
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, shares issued	15,135,598	15,080,594
Common stock, par value	$ 0.01	$ 0.01		$ 0.01
Change in pension and postretirement obligations, net of tax	$ (141)	$ 82	$ (73)
Common stock, shares authorized	45,000,000	45,000,000