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Segment Information - Net Sales to Foreign Customers (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Sales Information [Line Items]
Foreign net sales to unaffiliated customers	$ 149,035	$ 177,350	$ 202,223	$ 150,679	$ 177,137	$ 182,374	$ 209,275	$ 190,245	$ 679,287	$ 759,031	$ 805,256
Unaffiliated Customers [Member]
Sales Information [Line Items]
Foreign net sales to unaffiliated customers									34,154	32,170	36,215
Canada [Member] | Unaffiliated Customers [Member]
Sales Information [Line Items]
Foreign net sales to unaffiliated customers									19,976	21,079	23,765
Other [Member] | Unaffiliated Customers [Member]
Sales Information [Line Items]
Foreign net sales to unaffiliated customers									$ 14,178	$ 11,091	$ 12,450

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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