Major Customers - Significant Customers as Percentage of Total Net Sales (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue, Major Customer [Line Items]
Percentage of total net sales	10.00%
Customer A [Member]
Revenue, Major Customer [Line Items]
Percentage of total net sales	16.80%	20.40%	20.70%
Customer B [Member]
Revenue, Major Customer [Line Items]
Percentage of total net sales	13.10%	11.40%	10.50%
Customer C [Member]
Revenue, Major Customer [Line Items]
Percentage of total net sales	12.30%	10.30%	8.90%