Fair Value (Tables)

6 Months Ended

Jun. 30, 2013

Fair Value Disclosures [Abstract]

Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis

The following is a list of the Company’s assets required to be measured at fair value on a recurring basis and where they were classified within the hierarchy as of June 30, 2013 (in thousands):

	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Marketable Securities
Money market funds (1)	$	15,834	$	15,834	$	—	$	—
Corporate bonds and notes (2)	132,948		—		132,948		—
Municipal bonds and notes (2)	118,256		—		118,256		—
Treasury and agency notes and bills (2)	17,391		—		17,391		—
Certificate of deposit (2)	3,501		—		3,501		—
Commercial paper (3)	44,806		—		44,806		—
Total Assets	$	332,736	$	15,834	$	316,902	$	—

The following footnotes indicate where the noted items were recorded in the Condensed Consolidated Balance Sheet at June 30, 2013:

(1) Reported as cash and cash equivalents.

(2) Reported as short-term investments.

(3) Reported as either cash and cash equivalents or short-term investments.

The following is a list of the Company’s assets required to be measured at fair value on a recurring basis and where they were classified within the hierarchy as of December 31, 2012 (in thousands):

	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level  1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Marketable Securities
Money market funds (1)	$	34,106	$	34,106	$	—	$	—
Corporate bonds and notes (2)	171,564		—		171,564		—
Municipal bonds and notes (2)	110,208		—		110,208		—
Treasury and agency notes and bills (2)	29,058		—		29,058		—
Certificate of deposit (2)	4,504		—		4,504		—
Commercial paper (3)	46,143		—		46,143		—
Total Assets	$	395,583	$	34,106	$	361,477	$	—

The following footnotes indicate where the noted items were recorded in the Condensed Consolidated Balance Sheet at December 31, 2012:

(1) Reported as cash and cash equivalents.

(2) Reported as short-term investments.

(3) Reported as either cash and cash equivalents or short-term investments.