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Other Income, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended					12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Income and Expenses [Abstract]
Interest income						$ 14	$ 7	$ 51
Loss on foreign currency transactions						(336)	(316)	(118)
Other, net						(85)	255	97
Total	$ 17	$ (117)	$ (17)	$ (82)	$ 162	$ (407)	$ (54)	$ 30

The aggregate foreign currency transaction gain (loss) (both realized and unrealized) included in determining net income for the reporting period. Excludes foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements. For certain enterprises, primarily banks, that are dealers in foreign exchange, foreign currency transaction gains (losses) may be disclosed as dealer gains (losses).

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