Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity - Additional Information (Detail)

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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