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Discontinued Operations (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended		0 Months Ended		0 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Jun. 04, 2012 Shipping Systems Division [Member]	Dec. 31, 2012 Shipping Systems Division [Member]	Aug. 30, 2012 Precise Structural Products Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Description and Timing of Disposal			On June 4, 2012, the Company sold substantially all of the assets and liabilities of its railway securement business, Shipping Systems Division (SSD)		On August 30, 2012, the Company sold substantially all of the assets and liabilities of its precise structural products business
Proceeds from Divestiture of Businesses, Net of Cash Divested			$ 8,579		$ 2,643
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	3,193		3,508		(315)
Goodwill Allocated To Discontinued Operations		$ 2,588		$ 2,588

Amount of gain (loss), before tax expense or benefit and not previously recognized, resulting from the sale of a business component.

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- Definition

A description of the facts and circumstances leading to the completed or expected disposal, and the manner and timing of that disposal. Sales of disposal groups, including those classified as components of the entity (discontinued operations), are generally expected to be completed within one year of their classification as held-for-sale.

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