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Marketable Securities: (Tables)

3 Months Ended

Mar. 31, 2013

	March 31, 2013			December 31, 2012

Government debt securities, at par value	$	23,670		$	23,769
Less discount		(58	)		(102	)

		23,612			23,667
Unrealized gain		416			685

Fair value (Level 1 measurement)	$	24,028		$	24,352

- Definition

Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets.

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