Summarized Financial Information of Unconsolidated Joint Ventures (Sales, Profit, and Income) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Equity Method Investments and Joint Ventures [Abstract]
Net sales	$ 43,438	$ 48,259	$ 52,982
Gross profit	11,993	14,277	15,214
Net income	$ 5,753	$ 8,246	$ 8,652