Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2012

Financial Assets and Liabilities Measured at Fair Value

The following table presents the Company’s financial assets and liabilities which are measured at fair values on a recurring basis and that are subject to the disclosure requirements of the authoritative guidance as of December 31, 2012 and 2011 (in thousands).

	Fair Value		Level 1		Level 2		Level 3
December 31, 2012
Assets:
Overnight repurchase agreements	$	128,269	$	—	$	128,269	$	—
Certificates of deposit		11,849		—		11,849		—
Total	$	140,118	$	—	$	140,118	$	—
December 31, 2011
Assets:
Overnight repurchase agreements	$	100,077	$	—	$	100,077	$	—
Certificates of deposit		—		—		—		—
Total	$	100,077	$	—	$	100,077	$	—