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Related Party Transactions - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Carrier and Its Affiliates \| Cost of Goods, Total \| Supplier Concentration Risk
Related Party Transaction [Line Items]
Percentage of purchases from key suppliers	64.00%	62.00%	63.00%	62.00%
Amount payable to Carrier and its affiliates, net of receivables	$ 93,000		$ 93,000		$ 75,000
Carrier and Its Affiliates \| Sales Revenue, Product Line [Member] \| Customer Concentration Risk [Member]
Related Party Transaction [Line Items]
Revenues from sales to Carrier and its affiliates	28,000	$ 19,000	65,000	$ 51,000
Moss & Associates LLC \| Customary Payments for Remodeling of Corporate Headquarters
Related Party Transaction [Line Items]
Payment for related party transaction	0	58	124	702
Amount payable to related party	0		0
Greenberg Traurig, P.A. \| Customary Fees for Legal Services
Related Party Transaction [Line Items]
Payment for related party transaction	0	$ 71	18	$ 291
Amount payable to related party	$ 113		$ 113