Branch Closures and Related Costs - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2020
Restructuring Cost And Reserve [Line Items]
Pre-tax charge	$ 1,500		$ 1,500,000
Closure of Columbus, OH and Selkirk, NY Branches [Member]
Restructuring Cost And Reserve [Line Items]
Branch closures announcement description			During the second quarter of 2020, the Company announced the planned closure of its Columbus, OH and Selkirk, NY branches to improve operating results and gain operational efficiency through leverage of workforce, logistics and working capital
Pre-tax charge		$ 1,500,000
Estimated impairment of inventory and inventory transfer costs		700,000
Facility exit costs		200,000
Employee retention and extension of benefits		100,000
Other branch closure costs		$ 500,000
Expected substantially completion date of facility closures			Sep. 30, 2020