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Components of Other Income (Expense) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Component of Operating Other Cost and Expense [Line Items]
Income and investment income	$ 8	$ 87
Income tax expense	(297)	(218)
Acquisition related expenses		(15)
Other non-operating income	10
Total other income (expense), net	$ (279)	$ (146)

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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- Definition

The aggregate amount of other income amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), and (d) miscellaneous other income items.

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