Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2012

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

Our financial assets and liabilities carried at fair value measured on a recurring basis as of March 31, 2012 and December 31, 2011, consisted of the following (in thousands):

			Fair Value Measurements Using
	Total Fair		Quoted prices in		Significant other		Significant
	Value at		active markets		observable inputs		Unobservable inputs
Description	March 31, 2012		(Level 1)		(Level 2)		(Level 3)
Marketable securities (1)	$	3,064	$	3,064	$	—	$	—
			Fair Value Measurements Using
	Total Fair		Quoted prices in		Significant other		Significant
	Value at		active markets		observable inputs		Unobservable inputs
Description	December 31, 2011		(Level 1)		(Level 2)		(Level 3)
Marketable securities (1)	$	2,798	$	2,798	$	—	$	—

(1)    Our marketable securities, which consist entirely of available-for-sale equity securities, are valued using market prices in active markets. Level 1 instrument valuations are obtained from real-time quotes for transactions in active exchange markets involving identical assets.