Summarized Financial Information of Unconsolidated Joint Ventures (Sales, Profit, and Income) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Equity Method Investments and Joint Ventures [Abstract]
Net sales	$ 63,297	$ 70,368	$ 104,570
Gross profit (loss)	11,512	13,638	21,302
Net income (loss)	$ 9,486	$ 10,902	$ 17,316