Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value of Financial Instruments

Schedule of fair value of financial assets and liabilities by level

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  The tables below set forth, by level, our financial assets and liabilities that are recorded at fair value in the accompanying condensed consolidated balance sheets (in thousands):

	Fair Value at December 31, 2012
Description	Level 1		Level 2		Total
Assets
Money market funds(1)	$	145,422	$	—	$	145,422
Commercial paper and short term marketable securities(1)	$	—	$	—	$	—
Derivative financial instruments	$	—	$	13,785	$	13,785
Investments in marketable securities	$	—	$	80,341	$	80,341

	Fair Value at December 31, 2011
Description	Level 1		Level 2		Total
Assets
Money market funds(1)	$	238,812	$	—	$	238,812
Commercial paper and short term marketable securities(1)	$	—	$	45,897	$	45,897
Derivative financial instruments	$	—	$	2,275	$	2,275
Investments in marketable securities	$	—	$	75,228	$	75,228

(1)

Included in cash and cash equivalents in the consolidated balance sheets along with $51.9 million and $119 million of demand deposits at December 31, 2012 and 2011, respectively.