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Marketable Securities: (Tables)

3 Months Ended

Mar. 31, 2012

Marketable Securities:

Reconciliation of marketable securities

		March 31, 2012			December 31, 2011
Government debt securities, at par value		$	25,048		$	25,147
Less discount			(256	)		(314	)
			24,792			24,833
Unrealized gain			1,499			1,803
Fair value (Level 1 measurement)		$	26,291		$	26,636

Future contractual maturities of marketable securities

1 year or less		$	1,378
2 to 5 years			23,670
		$	25,048

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- Definition

A table of investments, shown as a text block.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

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- Definition

Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.

+ References

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