Summarized Financial Information of Unconsolidated Joint Ventures (Additional Information) (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) joint_venture	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Schedule of Equity Method Investments [Line Items]
Number of joint ventures that are 50% owned | joint_venture	2
Equity income in unconsolidated joint ventures	$ 4,898	$ 4,146	$ 2,890
Due from joint ventures, current	3,700	2,400
Due to joint ventures, current	$ 2,100	$ 1,600
Rogers INOAC Corporation
Schedule of Equity Method Investments [Line Items]
Ownership interest in joint venture	50.00%